Exhibit A - Construction Project Manual and Drawings CONTRACT DOCUMENTS AND SPECIFICATIONS FOR

Transcription

1 Exhibit A - Construction Project Manual and Drawings CONTRACT DOCUMENTS AND SPECIFICATIONS FOR UTHSC Student and Faculty Housing Pavement Repair Phase IV TO SERVE Walter P Moore 1301 McKinney, Suite 1100 Houston, Texas Date: August 12, 2014

2 TABLE OF CONTENTS Subject Division 31 - Earthwork Section Clearing and Grubbing Section Site Grading Section Trenching, Backfilling and Compaction Section Erosion and Sedimentation Control Section Lime Stabilization Section Trench Safety Section Fine Grading Division 32 Exterior Improvements Section Operation & Maintenance of Planting Section Concrete Pavement Section Painted Pavement Markings Section Thermoplastic Pavement Markings Section Hydromulch Seeding Section Tree & Plant Protection Section Gravel Section Irrigation System Section Soil Preparation Section Planting Media Section Mulches, Chemicals and Nutrients Section Lawns and Grasses Section Planting Division 33 - Utilities Section Drainage TABLE OF CONTENTS - 1 OF 1

3 SECTION CLEARING AND GRUBBING PART 1 - GENERAL Subsurface data is available from the Owner. The topographic survey is available from the Owner. Contractor is urged to carefully analyze the site conditions, including the topographic survey and geotechnical engineering report. 1.1 SCOPE A. This section pertains to the specifications for clearing and grubbing, topsoil removal and stockpiling, disconnecting, capping or sealing, and abandoning site utilities in place, and disposal of all vegetation, rubbish and excess material, as required for site grading and related staging areas as noted on the drawings and in accordance with these specifications. Protecting existing trees, shrubs, groundcovers, plants, irrigation system and grass to remain shall be dictated by Tree and Shrubbery Preservation Sections. 1.2 RELATED WORK SPECIFIED ELSEWHERE A. Drawings and general provisions of the Contract, including General and Supplemental Conditions and Division 01 Specifications apply to this section. B. Division 02 Section Existing Conditions for demolition of buildings, structures, and site improvements. C. Section Site Grading D. Section Trenching Backfill and Compaction E. Section Erosion and Sedimentation Control F. Section Tree and Plant Preservation Sections. 1.3 DEFINITIONS A. Topsoil: Natural or cultivated surface-soil layer containing organic matter and sand, silt, and clay particles; friable, pervious, and black or a darker shade of brown, gray, or red than underlying subsoil; reasonably free of subsoil, clay lumps, gravel, and other objects more than 2 inches in diameter; and free of subsoil and weeds, roots, toxic materials, or other non-soil materials. B. Tree Protection Zone: Area surrounding individual trees or groups of trees to be protected during construction, and defined by the drip line of individual trees or the perimeter drip line of groups of trees, unless otherwise indicated. C. Subgrade: The uppermost surface of an excavation, including excavation for trenches, or the top surface of a fill or backfill immediately below base course, pavement, or topsoil materials. Clearing and Grubbing Houston, Texas

4 D. Unauthorized excavation consists of removing materials beyond indicated subgrade elevations or dimensions without direction by the Owner. Unauthorized excavation, as well as remedial work directed by the Owner shall be at the Contractor's expense. 1.4 MATERIAL OWNERSHIP A. Except for stripped topsoil or other materials indicated to remain on Owner's property, cleared materials shall become Contractor's property and shall be removed from Project site. 1.5 SUBMITTALS A. Record drawings, according to Division 01 Section "Project Record Documents," identifying and accurately locating capped utilities and other subsurface structural, electrical, and mechanical conditions. 1.6 PROJECT CONDITIONS A. Traffic: Minimize interference with adjoining roads, streets, driveways, walks, and other adjacent occupied or used facilities during site-clearing operations. 1. Do not close or obstruct streets, driveways, walks, or other adjacent occupied or used facilities without permission from Owner and authorities having jurisdiction. 2. Provide alternate routes around closed or obstructed traffic ways if required by authorities having jurisdiction. B. Salvable Improvements: Carefully remove items indicated on drawings to be salvaged and store on Owner's premises where indicated. Contractor to contact Owner for coordination. C. Do not commence site clearing operations until temporary erosion and sedimentation control measures are in place D. Improvements on Adjoining Property: Authority for performing site clearing indicated on property adjoining Owner's property will be obtained by Owner before award of Contract. 1. Do not proceed with work on adjoining property until directed by Architect. E. Utility Locator Service: Notify utility locator service for area where Project is located before site clearing. F. General site narrative The limits of the project site consists of existing concrete parking, sidewalks, buildings and landscaped areas. Access to the site will be from the guard gate, located off of El Paseo Street. All buildings are to remain. Sidewalks and parking outside of the limits of construction are to remain. G. Staging Areas - Approval must be obtained from the Owner to use any area for staging that is not specifically identified as such on the plans. The Contractor shall restore all areas used for staging, the extent of said restoration to be defined by the Owner upon granting approval for the use of said area for staging. Clearing and Grubbing Houston, Texas

5 PART 2 - PRODUCTS 2.1 SOIL MATERIALS A. Satisfactory Soil Materials: Requirements for satisfactory soil materials are specified in Division 31 Section "Site Grading." 1. Obtain approved borrow soil materials off-site when satisfactory soil materials are not available on-site. PART 3 - EXECUTION 3.1 PREPARATION A. Protect and maintain benchmarks and survey control points from disturbance during construction. B. Protect existing site improvements to remain from damage during construction. 1. Restore damaged improvements to their original condition, as acceptable to Owner. C. Locate and clearly flag trees and vegetation to remain or to be relocated D. Control dust and noise, perform work in accordance with requirement of authorities having jurisdiction. No explosives are permitted. No on-site burning is permitted. 3.2 TEMPORARY EROSION AND SEDIMENTATION CONTROL A. Provide temporary erosion and sedimentation control measures per Section Erosion and Sedimentation Controls. B. Provide measures according to a sediment and erosion control plan, specific to the site, which complies with EPA 832/R or requirements of authorities having jurisdiction, whichever is more stringent. C. Inspect, repair, and maintain erosion and sedimentation control measures during construction until permanent vegetation has been established. D. Remove erosion and sedimentation controls and restore and stabilize areas disturbed during removal 3.3 TREE PROTECTION A. Refer to Tree and Plant Preservation Sections. Clearing and Grubbing Houston, Texas

6 3.4 UTILITIES A. Owner will arrange for disconnecting CenterPoint and AT&T utilities and sealing indicated utilities that serve existing structures before site clearing, when requested by Contractor. 1. Verify that utilities have been disconnected and capped before proceeding with site clearing. B. Locate, identify, disconnect, air conditioning units indicated to be adjusted 1. Disconnection is to be coordinated with the owner. All air conditioners are to be returned to service the same day it is disconnected in such a way as to minimize down time and tenant disruption. 2. Contractor is responsible for any service charge required for shut-off action. If other outstanding fees or billings are encountered, the Contractor shall notify the Owner for direction. C. Known utilities are shown on drawings. If utility discovered that is not shown contact Engineer for direction. Do not interrupt unknown utilities serving facilities occupied by Owner or others unless permitted under the following conditions and then only after arranging to provide temporary utility services according to requirements indicated: 1. Notify Owner not less than five days in advance of proposed utility interruptions. 2. Do not proceed with utility interruptions without Owner s written permission. 3.5 CLEARING A. Construction - That portion of the site required for constructing the work under these specifications shall be cleared of all vegetation, such as trees, brush, grass and weeds and all other objectionable matter to the limits as depicted in the plans. Stumps and roots shall be completely removed. B. Fill depressions caused by clearing and grubbing operations with satisfactory soil material unless further excavation or earthwork is indicated. 1. Place fill material in horizontal layers not exceeding a loose depth of 8 inches and compact each layer to a density equal to adjacent original ground. 3.6 STRIPPING A. Topsoil stripping: 1. Remove sod and grass before stripping topsoil. 2. Strip topsoil to whatever depths are encountered in a manner to prevent intermingling with underlying subsoil or other waste materials. A minimum of six (6) inches of soil shall be stripped. Clearing and Grubbing Houston, Texas

7 a. Remove subsoil and non-soil materials from topsoil, including trash, debris, weeds, roots, and other waste materials. 3. Stockpile topsoil materials away from edge of excavations without intermixing with subsoil. Grade and shape stockpiles to drain surface water. Cover to prevent windblown dust. a. Limit height of topsoil stockpiles to 72 inches. b. Do not stockpile topsoil within tree protection zones. c. Stockpile surplus topsoil to allow for re-spreading deeper topsoil. 4. Strip man-made fills under structures and pavements to minimum 12 below the ground surface and dispose of all waste materials. B. At all times during clearing and stripping operations the area shall be kept in a manner to prevent ponding. Refer to Section "Erosion and Sedimentation Control." 3.7 SITE IMPROVEMENTS A. Remove existing above- and below-grade improvements as indicated and as necessary to facilitate new construction. B. Remove slabs, paving, curbs, gutters, and aggregate base as indicated. 1. Unless existing full-depth joints coincide with line of demolition, neatly saw-cut length of existing pavement to remain before removing existing pavement. Saw-cut faces vertically. 2. Paint cut ends of steel reinforcement in concrete to remain to prevent corrosion. 3.8 DISPOSAL A. Disposal of cleared materials - Subject to approval of the Owner, material from clearing operations shall be disposed of by removal from the worksite. 1. Disposal of Material by Removal a. Material disposed of by removal from the construction area shall be removed from the areas prior to the completion of the work under these specifications. All materials removed shall become the property of the Contractor. b. Materials to be disposed of by dumping shall be hauled to an approved dump. It shall be the responsibility of the Contractor to make any necessary arrangements with private parties and with local officials pertinent to locations and regulations of such dumping. Any fees or charges required to be paid for dumping of materials shall be paid by the Contractor. c. In hauling any material from the site, it shall be the responsibility of the Contractor to prevent debris from dropping from vehicles and littering the site or area streets and roads. The Contractor shall promptly remove any debris which falls from vehicles. d. Separate recyclable materials produced during site clearing from other nonrecyclable materials. Store or stockpile without intermixing with other materials and transport them to recycling facilities Clearing and Grubbing Houston, Texas

8 3.9 STOCKPILING A. All topsoil from the stripping operations shall be stockpiled in the areas so designated on the drawings. Materials shall be deposited and spread in such a manner to ensure proper drainage and prevent severe erosion of the stockpile. B. Stockpile borrow materials and satisfactory excavated soil materials. Stockpile soil materials without intermixing. Place, grade, and shape stockpiles to drain surface water. Cover to prevent windblown dust. 1. Stockpile soil materials away from edge of excavations. Do not store within drip line of remaining trees. END OF SECTION Clearing and Grubbing Houston, Texas

9 SECTION SITE GRADING PART 1 - GENERAL 1.1 SCOPE OF WORK A. This Section pertains to the earthwork generally consisting of excavation, filling, backfilling and subgrade preparation as required for construction of site retaining walls/structures, slab on grade walks, pavement surfaces, landscaped areas and the general shaping of the site as shown, described or reasonably inferred on the drawings. B. Subsurface data is available from the Owner. Contractor is urged to carefully analyze the site conditions by review of the geotechnical engineering report and topographic survey. C. Construction Means, Methods, Techniques, Sequences and Procedures: 1. The Contractor is solely responsible for, and has sole control over, construction means, methods, techniques, sequences and procedures, and for coordinating all portions of the Work. 2. Shoring that is required to complete the Work, is considered a method or technique and is the sole responsibility of the Contractor. If a regulatory agency requires a licensed engineer to design, approve or provide drawings for shoring, then it is the sole responsibility of the Contractor to engage the services of a qualified Engineer for shoring design services. 1.2 RELATED WORK SPECIFIED ELSEWHERE A. Drawings and general provisions of the Contract, including General and Supplemental Conditions and Division 01 Specifications apply to this section B. Section Clearing and Grubbing C. Section Trenching, Backfilling and Compaction D. Section Erosion and Sedimentation Control E. Section Concrete Paving F. Section Tree and Plant Preservation G. Contractor shall comply with all current, applicable codes and regulations, including the Uniform Building Code. H. Contractor shall comply as applicable with Standard Specifications for City of Houston Public Works Construction, Current Edition, including all City of Houston and Harris County Amendments (herein after referred to as "Standard Specifications"). Site Grading Houston, Texas

10 I. Geotechnical Data: Subsurface data is available from the Owner. Contractor is urged to carefully analyze the site conditions. 1.3 PERMITS A. Prior to commencement of work, the Contractor shall be responsible for obtaining, at the contractors own expense unless otherwise specified in the Contract, Supplementary or General Conditions, all construction permits necessary to complete the site grading according to the plans and specifications. 1.4 APPLICABLE PUBLICATIONS A. The following specifications of the latest issue listed below, but referred to thereafter by basic designation only, form a part of this specification to the extent required by the references thereto. 1. American Society for Testing and Materials (ASTM). a. D 698 Laboratory Compaction Characteristics of Soil Using Standard Effort. b. D 1556 Density & Unit Weight of Soil in Place by the Sand-Cone Method. c. D 1557 Laboratory Compaction Characteristics of Soil Using Modified Effort. d. D 4253 Maximum Index Density & Unit Weight of Soils using a Vibratory Table. e. D 4254 Minimum Index Density & Unit Weight of Soils in Calculation of Relative Density. f. D 6938 Standard Test Method for In-Place Density and Water Content of Soil and Soil-Aggregate by Nuclear Methods (Shallow Depths) 2. Texas Department of Transportation (TXDOT) a. TXDOT Tex-227-F b. TXDOT 2004 Standard Specifications Item 247 c. TXDOT 2004 Standard Specifications Item PROTECTION OF EXISTING UTILITIES AND ADJACENT WORK A. Prior to earthwork operations, existing utilities, facilities and permanent objects to remain shall be located and adequately protected. Contractor shall contact the local utility coordinating committee or the utility company involved to locate all public and private utility company lines. B. If unknown and uncharted utilities are encountered during excavation, promptly notify Owner and the governing utility company when determinable and wait for instructions. C. For private property utilities found, if it is ascertained by Owner that such utility line has been abandoned, properly cap line at a depth approved by Owner or remove line as directed. All work to cap and remove abandoned public utilities found, must be coordinated through the governing utility company. D. If such unknown utilities are encountered and work is continued without contacting the Owner for instructions, and damage is caused to said utilities, Contractor shall repair, at his own expense, such damage to the satisfaction of the Owner and the Utility Company. Site Grading Houston, Texas

11 E. Refer to Specification section for other site related items requiring protection. 1.6 DEFINITIONS A. Excavation consists of the removal of material encountered to subgrade elevations and the reuse or disposal of materials removed. B. Subgrade: The uppermost surface of an excavation, including excavation for trenches, or the top surface of a fill or backfill immediately below base course, pavement, or topsoil materials. C. Borrow: Soil material obtained off-site when sufficient approved soil material is not available from excavations. D. Base Course: The layer placed between the subgrade and surface pavement in a paving system. E. Unauthorized excavation consists of removing materials beyond indicated subgrade elevations or dimensions without direction by the Owner. Unauthorized excavation, as well as remedial work directed by the Owner shall be at the Contractor's expense. F. Structures: Buildings, footings, foundations, retaining walls, slabs, tanks, curbs, mechanical and electrical appurtenances, or other man-made stationary features constructed above or below ground surface. G. Unforeseen Excavation: Excavation of material, regardless of its character or nature, below the subgrade elevation required to construct the work as indicated on the drawings or specified herein. H. Geotechnical Engineer: Person or company contracted by the owner and/or through the architect to provide testing and onsite Geotechnical services during the construction schedule. 1.7 QUALITY ASSURANCE A. Pre-Excavation Conference: Conduct conference at Project site to comply with requirements in Division 01 Section "Project Meetings." B. Codes and Standards: Perform earthwork complying with requirements of authorities having jurisdiction. C. Testing and Inspection Service: Contractor will employ a qualified independent geotechnical engineering testing agency to classify proposed on-site and borrow soil materials to verify that soils comply with specified requirements and to perform required field and laboratory testing. Contractor responsible to coordinate with the testing agency prior to start of work requiring testing so as to minimize unnecessary cost or delays to the project. D. Testing: 1. Contractor will retain and pay a qualified Geotechnical engineer to take all field samples and do all laboratory testing necessary to verify compliance of the work to these Specifications or as required by City or other regulatory agencies. The Geotechnical Engineer shall submit results of all testing done during the course of the work to the Owner, Engineer, and Contractor. Site Grading Houston, Texas

12 2. Notify testing lab a minimum of 48 hours in advance of the time testing is required to satisfy requirements of this section. 3. Should testing specified above show work which does not satisfy these Specifications, the Contractor shall pay, for all additional tests required to determine the extent of work that is not satisfactory and for all additional tests necessary to demonstrate compliance with these specifications. 4. All tests shall be performed by the Soil Engineer in accordance with ASTM D 1557, D1556, D2922, D3017, or other test method selected by Geotechnical Engineer. 1.8 PROJECT/SITE CONDITIONS A. The limits of the project site consists of existing concrete parking, sidewalks, buildings and landscaped areas. Access to the site will be from the guard gate, located off of El Paseo Street. All buildings are to remain. Sidewalks and parking outside of the limits of construction are to remain. 1.9 SUBMITTALS A. Samples: Submit samples of all materials used for Architect's approval wherever specified or as directed by the Architect. B. Shoring and Slope Protection Design: 1. Prior to beginning any excavation, submit certification to the Owner that the proposed shoring and slope protection system has been accepted and approved by all governing jurisdictions. Certification shall be signed and sealed by the engineer of record for the shoring design. 2. Provide signed letter from the Geotechnical Engineer stating that the proposed design complies with the recommendations of geotechnical reports. PART 2 - PRODUCTS 2.1 SOIL MATERIALS A. Fill materials and sources must be approved by the Geotechnical Engineer. The Contractor is responsible for providing adequate samples and testing results to the Geotechnical Engineer for testing and approval. B. Not used. C. General fill per 2.3 below, material shall be used for fill in landscaping areas not supporting structures. Topsoil per 2.4 below, shall be spread over landscape areas as needed. Site Grading Houston, Texas

13 D. Fill material beneath paving can be per 2.2 and 2.3 below. Regardless of the fill material used, subgrade treatment shall be chemically stabilized for the thickness specified and detailed in the drawings. E. Material excavated onsite may be used as fills, with prior Geotechnical Engineer approval. 1. Site Materials: a. Onsite fill materials shall be free of organic or deleterious products. b. Onsite soils may be considered for use as fill in pavement areas. The onsite soils shall be compacted to a minimum of 95% of the Standard Proctor maximum dry density at a moisture content between optimum and +4% wet of the optimum moisture content in lifts not exceeding 8 loose measure. c. Moisture content of existing soils may require adjustment for compaction approval. 2.2 SELECT FILL A. See geotechnical engineering report for select fill recommendations. 2.3 GENERAL FILL A. General fill material shall be used for fill in landscaping areas not supporting structures, but may be used beneath pavement where approved by the Engineer. General fill material may be any native soil free of debris, trash, rocks over 2 inches in diameter and other objectionable material. General fill shall be placed and compacted in lifts not exceeding 8" in thickness to 95 percent standard density as defined by ASTM D 698. Where called for by the plans or by the landscape specifications, the fill shall be kept sufficiently low to accommodate the proper depth of topsoil and related sod or other vegetation. 2.4 TOPSOIL A. Topsoil material shall be native earthen material suitable for growth of vegetation such as silty and sandy loams. The site stripings may be used as topsoil unless otherwise dictated by the Owner. Topsoil shall be spread over landscape areas to a depth of 4 to 6 inches and compacted to 85 percent of standard density ASTM D 698. Stockpiling of Topsoil may not exceed 6 feet in height. 2.5 SPECIAL DRAINAGE MEDIA A. Drainage Fabric: Nonwoven geotextile, specifically manufactured as a drainage geotextile; made from polyolefins, polyesters, or polyamides; and with the following minimum properties determined according to ASTM D 4759 and referenced standard test methods: 1. Grab Tensile Strength: 110 lbf; ASTM D Tear Strength: 40 lbf; ASTM D Puncture Resistance: 50 lbf; ASTM D Site Grading Houston, Texas

14 4. Water Flow Rate: 150 gpm per sq. ft.; ASTM D Apparent Opening Size: No. 50; ASTM D B. Approved Materials 1. Mirafi 140 filter fabric 2. or acceptable substitution. PART 3 - EXECUTION 3.1 PREPARATION A. Inspection: 1. Prior to performing the work of this Section, carefully inspect the installed work of all other trades and verify that all such work is complete to the point where work may properly commence. 2. Verify that work may proceed in complete accordance with the design. B. Discrepancies: 1. In the event of discrepancy, immediately notify the Engineer. C. General 1. Use all means necessary to control dust on or near the site resulting from the performance of the Work. Thoroughly moisten all surfaces to prevent dust being a nuisance to the public, adjacent uses, and concurrent work on site. Moisture level during compaction operations shall not exceed that amount as specified by Geotechnical Engineer. 2. Verify existing grades and dimensions before starting any grading operations. If any discrepancy exists, notify Architect immediately. 3. Use all means necessary to protect all existing features, products, or items designated to remain, as well as all work of this Section. In the event of damage, repair or replace immediately to the approval of and at no additional cost to the Owner. 4. Protect and maintain existing benchmarks throughout the course of the work. Reestablish monuments or stakes disturbed or destroyed during the course of the Work at no additional expense to the Owner. 5. Conduct work so as to avoid injury to persons and damage to adjacent property. Provide appropriate shoring, bracing and barriers, including light when necessary. 6. Coordinate operations with, and provide access to, the Geotechnical Engineer or designated representative during demolition and construction for purposes of testing, investigation and inspection. Site Grading Houston, Texas

15 D. Preparation 1. Protect structures, utilities, sidewalks, pavements, and other facilities from damage caused by settlement, lateral movement, undermining, washout, and other hazards created by earthwork operations. 2. Provide erosion-control measures to prevent erosion or displacement of soils and discharge of soil-bearing water runoff or airborne dust to adjacent properties and walkways. 3. Protect subgrade from excessive drying or excessive moisture. 3.2 EXCAVATION A. General - Contractor shall complete all excavation required regardless of the variations in hardness, type, or density of materials encountered, to the dimensions and elevations shown on the drawings. When unsatisfactory material is uncovered, that material shall be removed and replaced with select fill, the extent of such excavation to be directed by the Owner. Unsatisfactory material shall be removed to the stockpile area or from the site as directed by the Owner. 1. Unclassified Excavation: Excavation is unclassified and includes excavation to subgrade elevations regardless of the character of surface and subsurface conditions encountered, including rock, soil materials, and obstructions. a. If excavated materials intended for fill and backfill include unsatisfactory soil materials and rock, replace with satisfactory soil materials. b. Remedial work due to over-excavation including provision of suitable and stable backfill meeting the degree of compaction required shall be at the Contractor s expense. 2. Borrow Material: If excavated materials of a suitable nature are not of sufficient quantity to complete the work, contractor may provide borrow material in sufficient quantity to complete the work at Owner s approval at no additional cost to the Owner. 3. Disposing of Excavated Material: Dispose of excess satisfactory soil material and all unsatisfactory soil material and rock obtained from excavations in accordance with the provisions of this Section. B. Excavation for Pavement 1. See geotechnical engineering report for direction. 2. Excavation required beneath pavement sections shall comply with elevations and dimensions shown on the plans and detailed sections within a tolerance of plus or minus 0.10 foot. Contractor shall take care not to disturb areas that are designated to be protected or are outside the construction limits. Excavated areas shall be kept free of ground and surface water. C. Cut Slopes and Ditches Site Grading Houston, Texas

16 1. Slopes and grades of ditches shall conform to the plans within a tolerance of plus or minus 0.10 foot. No exposed slopes shall be steeper than three feet horizontal to one foot vertical. Where slope protection is specified or called out on the plans, said protection shall be placed as soon as practical, after exposing the slope. Erosion and sedimentation controls shall be implemented in all cut areas as specified in Section , Erosion and Sedimentation Control. 3.3 FILL AND BACKFILL A. Placement 1. Fill material shall be placed in loose lifts not exceeding eight (8) inches for areas beneath site structures and pavement, and twelve (12) inches for landscape areas not supporting structures. Fill areas shall be compacted to 95 percent of Standard Maximum Density at the proper moisture of that soil as defined by ASTM D Each lift shall be thoroughly compacted and shall have obtained satisfactory density prior to proceeding with the next lift. 3. The top six (6) inches of material beneath vehicular pavement shall be lime stabilized after placement as shown in the details. Material shall be free of trash and rocks over three (3) inches in diameter. 4. Fill shall be brought up to the proper elevations as determined from the lines, grades, sections and elevations shown on the plans. B. Site Retaining Wall/Structure Backfill: 1. Not used. C. Compaction and Finishing 1. Suitable compaction equipment commonly used to meet the requirements for this type of compaction work should be used. 2. The finished surface shall be reasonably smooth, compacted, and free from irregular surface changes. The surface grade shall be consistent with the drainage intent shown on the plans such that no unwanted ponding shall occur. 3. Surface shall not be more than 0.10 feet above or below the established grade, and all ground surfaces shall vary uniformly between indicated grades. 4. Cut material from the site may be used for fill material if approved by Geotechnical Engineer. Where cut material is used as fill, each lift of such material shall be properly mixed to obtain a uniform material, with clay being the predominant material when mixed with silt, maintaining a plasticity index less than 20. a. Lime stabilization shall be used for clay material and shall conform to Section Lime Stabilization Site Grading Houston, Texas

17 3.4 EROSION AND PROTECTION A. There shall be at all times adequate protection to newly graded areas to prevent soil erosion as provided in Section , Erosion and Sedimentation Control. B. Soil erosion that occurs prior to acceptance of the work shall be repaired at no expense to the Owner. C. Protecting Graded Areas: Protect newly graded areas from traffic, freezing, and erosion. Keep free of trash and debris. D. Repair and reestablish grades to specified tolerances where completed or partially completed surfaces become eroded, rutted, settled, or where they lose compaction due to subsequent construction operations or weather conditions. 1. Scarify or remove and replace soil material to depth as directed by Owner s Testing and Inspection Service; reshape and re-compact. E. Where settling occurs before Project correction period elapses, remove finished surfacing, backfill with additional soil material, compact, and reconstruct surfacing. 1. Restore appearance, quality, and condition of finished surfacing to match adjacent work, and eliminate evidence of restoration to the greatest extent possible. 3.5 GRADING A. Rough Grading 1. Cut and fill shall be left sufficiently high to require cutting by fine grading. 2. Grade to subgrade depths required for construction of finished surface materials and for controlled internal drainage of site. B. Fine Grading 1. Fine grading shall conform to elevations required to insure finished elevations as indicated on the drawings. 2. Provide a smooth transition between adjacent existing grades and new grades C. Slope grades to direct water away from buildings and to prevent ponding at a minimum of 5% grade for the initial 20 feet, as shown on the drawings or as directed by engineer. Maximum cross slope for all walkways shall be 2% for disabled access. Finish subgrades to required elevations within the following tolerances: 1. Lawn or Unpaved Areas: Plus or minus 0.1 foot (1.2 inches) 2. Walks: Plus or minus ½ inch 3. Pavements: Plus or minus ½ inch Site Grading Houston, Texas

18 3.6 TESTING AND INSPECTION A. Testing of Materials and Installed Work 1. Materials and installed work require testing to show that the specifications for the materials and work have been met. The Owner may, at the Owner s expense, take random tests on materials and installed work. The Contractor shall allow free access to material stockpiles and facilities at all times. In fill areas each lift must be tested and approved before proceeding on the next lift. Tests, not specifically indicated to be done at Owner's expense including the retesting of rejected materials and installed work, shall be done at the Contractor's expense. a. Testing to be provided by Contractor 1) All re-testing for areas failing the first test. B. Contractor shall notify Owner 24 hours prior to performing any testing. C. Maximum density tests per ASTM D 698 shall be taken on all fill materials at a rate of one test for each type of soil to be used and at least one test for every 1000 cubic yards of fill. D. Field density tests per ASTM D 1556 or ASTM D 2922 shall be taken on all fill material at a rate of one test for every 10,000 square feet and at least one test per lift. E. All imported fill material shall be approved prior to importing. 3.7 DUST ABATEMENT A. The Contractor shall comply with applicable Federal, State, and local laws and regulations concerning the prevention and control of dust pollution. B. During the performance of the work required by these specifications or any operations appurtenant thereto, whether on right-of-way provided by the Owner or elsewhere, the Contractor shall furnish all the labor, equipment, materials, and means required, and shall carry out proper and efficient measures wherever and as often as necessary to reduce the dust nuisance, and to prevent dust which has originated from the contractor s operations from damaging crops, orchards, cultivated fields, and dwellings, or causing a nuisance to persons. The Contractor will be held liable for any damage resulting from dust originating from the contractor s operations under these specifications. C. Dust Control shall be accomplished by one of the following methods: 1. Whenever ordered by the Owner, the Contractor shall furnish and distribute over the traveled road surfaces, which have not yet been fully restored, an application of Calcium Chloride. The material used shall be Regular Flake Calcium Chloride having a minimum chemical content of Calcium Chloride of 77%. Unless otherwise specified or ordered by the Owner, rate of application shall be three (3) pounds per square yard of surface covered. 2. Whenever ordered by the Owner, the Contractor shall apply on traveled road surfaces "Bituminous Surface Treatment" in accordance with the current Texas Standard Specifications for Construction of Highways, Streets and Bridges. Site Grading Houston, Texas

19 D. The cost of sprinkling or of other methods of reducing formation of dust shall be included in the prices bid in the schedule for other items of work. 3.8 STORAGE OF SOIL MATERIALS A. Stockpile borrow materials and satisfactory excavated soil materials. Stockpile soil materials without intermixing. Place, grade, and shape stockpiles to drain surface water. Cover to prevent windblown dust. 1. Stockpile soil materials away from edge of excavations. Do not store within drip line of remaining trees. 2. Stockpile Topsoil may not exceed 6 feet in height. 3.9 FIELD QUALITY CONTROL A. General: Testing shall be the responsibility of the Owner and costs of initial testing shall be paid by Owner. Cost of all subsequent testing necessary due to non-compliance with specifications shall be paid by Contractor. B. Density Test: 1. Density tests shall be performed by an approved commercial testing laboratory approved per ASTM D Tests shall be performed in accordance with the referenced Standards. 3. Field and laboratory tests for moisture-density relations shall be determined in accordance with ASTM D The frequency and location of field density tests will be determined by the Geotechnical Engineer. 4. Trenches improperly compacted shall be reopened to the depth directed, then refilled and compacted to the density specified at no additional cost to the Owner DRAINAGE CONTROLS A. Provide all necessary temporary apparatus, pumps, curbs or ditches as required to divert or convey water from any source away from the Work. Do not allow water from any source to accumulate within or damage earthwork. END OF SECTION Site Grading Houston, Texas

20 SECTION TRENCHING, BACKFILLING AND COMPACTION PART 1 - GENERAL 1.1 SCOPE A. This Section specifies the requirements for excavating and backfilling for storm sewer, sanitary sewer, water distribution lines, and all related appurtenances. Excavation and backfill shall be in conformance with the locations, lines, elevations and grades shown on the plans. This section also specifies the requirements for clay plugs that must be installed near building face on all utility trenches including water, storm sewer, sanitary sewer, mechanical, electrical, telecom, data, plumbing and other utility trenches for slab on grade and structural first floor building projects. B. Subsurface data is available from the Owner. Contractor is urged to carefully analyze the site conditions. 1.2 APPLICABLE PUBLICATIONS A. The following specifications and standards of the latest issue listed below, but referred to thereafter by basic designation only, form a part of this specification to the extent required by the reference thereto. 1. American Society for Testing and Materials (ASTM). a. D 698 Laboratory Compaction Characteristics of Soil Using Standard Effort. b. D 1556 Density and Unit Weight of Soil in Place by the Sand-Cone Method. c. D Maximum Index Density and Unit Weight of Soils using a Vibratory Table. d. D Minimum Index Density and Unit Weight of Soils in Calculation of Relative Density. e. D Standard Practice for Underground Installation of Thermoplastic Pipe for Sewers and Other Gravity-Flow Applications 2. Texas Department of Transportation (TxDOT) Test Procedures a. Tex-110-E Particle Size Analysis of Soils b. Tex-120-E Soil Cement Testing 1.3 RELATED WORK SPECIFIED ELSEWHERE A. Drawings and general provisions of the Contract, including A-procurement and Contracting Requirements, Division 00 and Division 01 apply to this section. B. Section Site Grading C. Section Trench Safety D. Section Drainage Trenching, Backfilling and Compaction Houston, Texas

21 1.4 SUBMITTALS A. Material Test Reports: From a qualified testing agency indicating and interpreting test results for compliance of the following with requirements indicated: 1. Classification according to ASTM D 2487 of each on-site and borrow soil material proposed for backfill B. Pre-excavation Photographs or Videotape: Show existing conditions of adjoining construction and site improvements, including finish surfaces that might be misconstrued as damage caused by earthwork operations. Submit before excavation begins. 1.5 PROJECT CONDITIONS A. Existing Utilities: Do not interrupt utilities serving facilities occupied by Owner or others unless permitted in writing by Owner and then only after arranging to provide temporary utility services according to requirements indicated 1. Notify Owner not less than five days in advance of proposed utility interruptions. 2. Do not proceed with utility interruptions without Owner s written permission. 3. Contact utility-locator service for area where Project is located before excavating. B. Demolish and completely remove from site existing underground utilities indicated to be removed. Coordinate with utility companies to shut off services if lines are active. C. Utilities have been located from surveys and available existing records. Not all utilities may be shown on the Drawings. Locate all utilities prior to beginning any construction activities. D. Where utilities require adjustment or relocation to construct the Work, and those utilities are shown on the Drawings, relocation or adjustment is a part of the Work and shall be completed at no additional expense to the Owner. E. Where utilities require adjustment or relocation to construct the Work, and those utilities are not shown on the Drawings, notify Architect before proceeding. Relocate or adjust utility as directed. Utility relocation and/or adjustment will be paid for according to the Contract provisions for changes in Work. F. If utility is damaged by Contractor, notify utility owner and Architect immediately. Repair or replacement of utilities damaged by Contractor, whether utilities are shown on the drawings or not shown on the drawings, shall be Contractor's expense. 1.6 PERMITS A. Prior to commencement of work, the Contractor shall be responsible for obtaining, at the contractors own expense, all construction permits necessary to complete the project according to the plans and specifications. Trenching, Backfilling and Compaction Houston, Texas

22 1.7 DEFINITIONS A. Excavation consists of the removal of material encountered to subgrade elevations and the reuse or disposal of materials removed. B. Subgrade: The uppermost surface of an excavation, including excavation for trenches, or the top surface of a fill or backfill immediately below base course, pavement, or topsoil materials. C. Borrow: Soil material obtained off-site when sufficient approved soil material is not available from excavations. D. Base Course: The layer placed between the subgrade and surface pavement in a paving system. E. Unauthorized excavation consists of removing materials beyond indicated subgrade elevations or dimensions without direction by the Owner. Unauthorized excavation, as well as remedial work directed by the Owner shall be at the Contractor's expense. F. Structures: Buildings, footings, foundations, retaining walls, slabs, tanks, curbs, mechanical and electrical appurtenances, or other man-made stationary features constructed above or below ground surface. G. Utilities include underground pipes, conduits, ducts, and cables, as well as underground services within building lines. H. Unforeseen Excavation: Excavation of material, regardless of its character or nature, below the subgrade elevation required to construct the work as indicated on the drawings or specified herein. I. Bedding Material: Granular material utilized to bed piped utilities placed in trench excavations. 1.8 QUALITY ASSURANCE A. Pre-Excavation Conference: Conduct conference at Project site to comply with requirements in Division 01. B. Codes and Standards: Perform earthwork complying with requirements of authorities having jurisdiction. C. Testing and Inspection Service: Owner will employ a qualified independent geotechnical engineering testing agency to classify proposed on-site and borrow soil materials to verify that soils comply with specified requirements and to perform required field and laboratory testing. PART 2 - PRODUCTS 2.1 EARTH BACKFILL A. Earth backfill shall be native soils free of debris, trash, rocks over 2 inches in diameter and other objectionable material. Trenching, Backfilling and Compaction Houston, Texas

23 2.2 CEMENT STABILIZED SAND BACKFILL A. Cement stabilized sand material shall contain clean bank sand meeting TxDOT Test Method TEX-110-E, water and a minimum of 7% hydraulic cement based on the dry weight of the aggregate meeting TxDOT Test Method Tex-120-E. B. The sand cement mixture shall produce a minimum unconfined compressive strength of one hundred pounds per square inch (100psi) in forty eight hours, when compacted to ninety fire percent (95%) of Standard Proctor density (ASTM D558), without additional moisture control and when cured in plastic bags at a temperature of 73.4 degrees F at plus or minus 3 degrees F and tested in accordance with ASTM D SAND BACKFILL A. Clean bank sand meeting TxDOT Test Method TEX-110-E. 2.4 WATER A. Water used for mixing or curing shall be reasonably clean and free of oil, salt, acid, alkali, sugar, vegetable matter or other substances injurious to the finished product. B. Water sources other than the local municipal domestic water supply must be approved by the Owner. C. If onsite reclaimed water sources are used, tanks and apprentices must be clearly marked with the words non-potable water. PART 3 - EXECUTION 3.1 PREPARATION A. Protect structures, utilities, sidewalks, pavements, and other facilities from damage caused by settlement, lateral movement, undermining, washout, and other hazards created by earthwork operations. B. Not used. C. Provide erosion-control measures to prevent erosion or displacement of soils and discharge of soil-bearing water runoff or airborne dust to adjacent properties and walkways. 3.2 EXCAVATION A. General: 1. All utility trenches shall be constructed in conformance with OSHA trench safety standards. Trenching, Backfilling and Compaction Houston, Texas

24 2. Sheeting and shoring shall be accomplished to the extent necessary to maintain the sides of the trench in a vertical position throughout the construction period for trenches five (5) feet in depth or deeper. Where approved, trench sides may be laid back in lieu of shoring to meet OSHA safety standards. 3. Utilities shall not be constructed or laid in a trench in the presence of water. All water shall be removed from the trench sufficiently prior to the line placing operation to insure a dry, firm bed on which to place the utility line. 4. Unclassified Excavation: Excavation is unclassified and includes excavation to subgrade elevations regardless of the character of surface and subsurface conditions encountered, including rock, soil materials, and obstructions. a. If excavated materials intended for fill and backfill include unsatisfactory soil materials and rock, replace with satisfactory soil materials. b. Remedial work due to over-excavation including provision of suitable and stable backfill meeting the degree of compaction required shall be at the Contractor s expense. 5. Borrow Material: If excavated materials of a suitable nature are not of sufficient quantity to complete the work, provide borrow material in sufficient quantity to complete the work at no additional cost to the Owner. 6. Disposing of Excavated Material: Dispose of excess satisfactory soil material and all unsatisfactory soil material and rock obtained from excavations in accordance with the provisions of this Section. 7. Where utilities are in fill, compact fill material to 95% standard proctor maximum dry density at least 12 above the top of the proposed utility prior to excavation of trench. 8. Where indicated widths of utility trenches are exceeded, provide stronger pipe, or special installation procedures, as required by Engineer. Unauthorized excavation, as well as remedial work directed by the Owner, shall be at the Contractor s expense. B. Sewer Trenches: 1. For pipe sizes less than 42" in diameter, the minimum trench width shall be outside diameter of pipe plus 18 inches. 2. For pipe sizes 42" in diameter and larger the minimum trench width shall be outside diameter of pipe plus 24 inches. 3. Trenches shall be excavated to a depth at least 6" below the barrel of pipe, and then the pipe bedding shall be placed as shown on the appropriate details contained with the plans and as described in paragraph *3.3 A.* of this section. C. Appurtenances 1. Excavation for manholes, tie-in to existing facilities and similar structures shall be sufficient to leave at least 12" clear between the outer surfaces and the embankment or sheeting that may be used to hold and protect the banks. Any over depth excavation below Trenching, Backfilling and Compaction Houston, Texas

25 such appurtenances shall be refilled with cement stabilized sand, as directed, at no additional cost to Owner. D. Water line Trenches: 1. Water lines must be a minimum of four feet in depth from the top of proposed grade to the top of pipe, unless otherwise shown on the plans. 2. Trench width for water lines shall be a minimum of the outside pipe diameter plus 18 inches. 3. Trenches shall be excavated to a depth of at least 6 inches below the barrel of pipe, and then the pipe bedding shall be placed as shown on the details within the plans and as described in paragraph *3.3 B.* of this section. 3.3 PIPE BEDDING AND BACKFILL A. Storm and sanitary sewer trenches: 1. Pipe shall be bedded in trench in accordance with the details shown on the plans. When pipe has greater than twelve (12) feet of cover, use Class A bedding and backfill. 2. Cement stabilized sand shall be per Part 2.2.A of this specification, mixed in a mill type mixer. When the details call for cement stabilized sand bedding, the material shall extend from a point 6" below the bottom of the pipe to the level of the spring line. This material cannot be used after is loses its moisture content. 3. The cement stabilized sand shall be thoroughly rodded after being placed in trench. 4. Bedding, sewer pipe and initial backfill over the top of pipe must be placed in a single day's operation for any given portion of pipe. Initial backfill shall be placed to one foot above the top of pipe for earth backfill and 6 inches over the top of pipe for cement stabilized sand backfill. 5. Remainder of trench backfill shall be placed the next day or later in 8" lifts, after pipe is laid in conformance with these specifications and the details on the plans. 6. Backfill shall be placed in uniform layers not to exceed 8" loose depth, and compacted to a minimum of 95 percent of Standard Maximum Density (ASTM D 698) at the proper moisture content specified in the Geotechnical report for this project. 7. Backfill, under pavement and to one foot from outer edge, shall be cement stabilized sand of the type and method described under paragraph 3.3 A.1 through 5, above, up to one foot below subgrade elevation. Remainder of backfill to subgrade to be as specified in paragraph 3.3 A.5. above and stabilized where required. B. Water line Trenches 1. Pipe bedding shall consist of 6 inches of clean sand placed before the pipe is laid. Trenching, Backfilling and Compaction Houston, Texas

26 2. After laying pipe and insuring that the pipe is properly placed and supported by the sand bedding, clean sand backfill shall be placed to 6 inches above the top of pipe. The sand backfill shall be thoroughly rodded and tamped for compaction. 3. For water lines beneath pavement and to one foot horizontally from the outer edge of pavement, the remainder of the trench backfill shall be clean sand placed up to the top of subgrade, thoroughly rodded and tamped. 4. For water lines not beneath pavement or within one foot horizontally from the outer edge of pavement, the remainder of the trench backfill shall be earth fill paced in uniform layers not to exceed 8" loose depth, each lift to be compacted to a minimum of 95 percent of Standard Density (ASTM D698) at the proper moisture content specified in the Geotechnical report for this project. All earth backfill to be placed the next day or later after the pipe is laid. C. Bentonite Clay Plug for All Utility Trenches (water, storm, sanitary, mechanical, electrical, telecom, plumping, etc.) 1. All trenches must have a bentonite granular clay plug installed to reduce the transmission of ground water under slab on grade buildings and structural first floor buildings. a. The plug must be installed at a distance of one foot beyond the face of the building foundation and be a minimum of one-foot wide. b. The plug must extend 6 beneath utility trench into undisturbed soil. This portion of the clay plug must be installed prior to the installation of the utility pipe. c. The plug must extend across the entire trench width and extend 6 into undisturbed soil beyond the trench width. Install bentonite clay plug and the utility pipe at the same time. d. The plug must extend to within 12 of finished grade. A clay plug cap consisting of material with a plasticity index greater than 15 and a liquid limit in excess of 30 shall be placed on top of the bentonite granular clay plug. This clay plug cap shall fill the remaining 12 up to finished grade and be placed up to the edge of the building. 3.4 STORAGE OF SOIL MATERIALS A. Stockpile borrow materials and satisfactory excavated soil materials. Stockpile soil materials without intermixing. Place, grade, and shape stockpiles to drain surface water. Cover to prevent windblown dust. 1. Stockpile soil materials away from edge of excavations. Do not store within drip line of remaining trees. 3.5 FIELD QUALITY CONTROL A. General: Testing shall be the responsibility of Owner and costs of initial testing will be paid by Owner. Cost of subsequent testing necessary due to non-compliance with Specifications shall be paid by Contractor. B. Density Test: Trenching, Backfilling and Compaction Houston, Texas

27 1. Density tests shall be performed by representatives of Owner s Testing Agency. 2. Frequency and scope of testing shall be established by Geotechnical Engineer, and as required by local jurisdictional authority. If Geotechnical Engineer has not established a frequency of testing in the Geotechnical Report, testing shall be at every 100 linear foot of trench at a minimum of one per lift and a minimum of one per day. 3. Tests shall be performed in accordance with the referenced Standards. 4. Laboratory tests for moisture-density relations shall be determined in accordance with ASTM D A minimum of one test shall be performed for each major soils type. In addition, sufficient number of retests or check points shall be performed to evaluate accuracy of maximum density values being used. 5. Field in-place density shall be determined in accordance with ASTM Test Methods D 1556 or D 2922, and the moisture-density relations shall be determined in accordance with ASTM Test Method D Reopen improperly compacted trenches to depth directed, then refill and compact to the specified density at no additional cost to Owner END OF SECTION Trenching, Backfilling and Compaction Houston, Texas

28 SECTION EROSION AND SEDIMENTATION CONTROL PART 1 - GENERAL 1.1 SCOPE OF WORK A. This Section pertains to the provisions for the control of erosion in the construction area and in stockpile areas including seeding as required and shown on the drawings. All areas where existing vegetation and grass cover have been bared by construction activities shall be protected from erosion. B. Contractor is responsible for meeting all local, state and federal regulations regarding erosion control including the applicable provisions of the National Pollution Discharge Elimination System, Phase II, regulations from the Clean Water Act. 1.2 RELATED WORK SPECIFIED ELSEWHERE A. Drawings and general provisions of the Contract, including A-procurement and Contracting Requirements, Division 00 and Division 01 apply to this section. B. Not Used C. Section Clearing and Grubbing D. Section Site Grading E. Section Trenching, Backfilling and Compaction F. Section Drainage G. Texas Department of Transportation s Standard Specifications for Construction and Maintenance of Highways, Streets, and Bridges (2004) H. Harris County Public Infrastructure Department Engineering Division Specifications for the Construction of Roads and Bridges within Harris County, TX latest printing October Erosion and Sedimentation Control Houston, Texas

29 1.3 PERMITS (NOT USED) 1.4 APPLICABLE PUBLICATIONS (NOT USED) 1.5 PROTECTION OF ADJACENT WORK (NOT USED) 1.6 DEFINITIONS A. Best Management Practices (BMP's) means physical facilities schedules of activities, prohibition of practices, maintenance procedures, and other management practices, when properly designed, installed, and maintained, will be effective to prevent or reduce the discharge of pollution associated with construction activities. BMP's also include treatment requirements, operating procedures, and practices to control site runoff, spillage or leaks, sludge or waste disposal, or drainage from raw material storage. B. Block Sodding: Sodding for erosion control and for final stabilization shall consist of providing and planting Bermuda grass, Saint Augustine grass, or other acceptable sod along or across such areas as are designated on the drawings and in accordance with the specification requirements herein outlined. C. Hydromulch Seeding: Seeding, followed by the application of a mulch erosion control blanket shall consist of preparing the ground, sowing of seeds, application of a fertilizer, and stabilization with mulch consisting of a biodegradable fiber along and across such areas as are designated on the plans and in accordance with these specifications D. Silt Fence: The reinforced filter fabric barrier consists of geotextile fabric supported by a net reinforced fence stretched across and attached to supporting posts or frame and entrenched. Work shall be performed during construction operations and prior to final stabilization to control erosion and sedimentation as designated on the plans and in accordance with these specifications. E. Inlet Protection Barriers: The inlet protection barrier consists of a geotextile fabric (filter fabric) supported by a net reinforced fence structure and constructed around a storm drain inlet, catch basin, or culvert. An alternative design of the inlet protection barrier, as approved by the Engineer, consists of fiber rolls placed around a frame, staked in place (or weighted down with clean gravel bags), and constructed around a storm drain inlet, catch basin or culvert. This work shall be performed during construction operations and prior to final stabilization to control erosion and sedimentation. As designated on the plans and in accordance with these specifications. F. Stabilized Construction Access: This work shall consist of the installation of temporary erosion protection and sediment control stabilized construction access - type I, rock, utilized during construction operations and prior to final stabilization, in accordance with these specifications and construction drawings G. Rock Filter Dams: Rock filter dams are temporary berms constructed of stone to intercept and slow storm water runoff to retain sediment on the construction site. Erosion and Sedimentation Control Houston, Texas

30 1. Depending upon the type of rock filter dam specified in the construction plans as Type 1, 2, 3, or 4, the aggregate fill may be unwrapped, wrapped in twisted hexagonal wire mesh, or confined in a gabion wire basket. Applications of Rock Filter Dams are as follows: a. Type 1 dams may be used at toe of slopes, around inlets, in small ditches, and at dike or swale outlets. Type 1 dams are recommended for erosion and sediment control from a drainage area of 5 acres or less. b. Type 2 dams may be used in ditches and at dike or swale outlets. c. Type 3 dams may be used in stream flow. d. Type 4 sack gabions may be used in ditches and smaller channels to form an erosion and sediment control dam 1.7 QUALITY ASSURANCE A. Codes and Standards: Install and maintain erosion control systems in compliance with all authorities having jurisdiction. 1.8 PROJECT/SITE CONDITIONS (NOT USED) 1.9 SUBMITTALS (NOT USED) PART 2 - PRODUCTS 2.1 SUSTAINABLE MATERIALS A. Contractor shall strive to utilize sustainable materials, which include rapidly renewable materials, regional materials, regionally manufactured materials, regionally extracted materials, recycled contents. 2.2 GRASS A. Materials for erosion control seeding shall conform to TxDOT Item 164. B. Materials for erosion control sodding shall conform to TxDOT Item FERTILIZER A. Materials for fertilizing erosion control seeding and/or sodding shall conform to TxDOT Item WATER A. Use clean potable water for maintaining the grass developed after erosion control seeding and/or sodding. Water shall be reasonably clean and free of oil, salt, acid, alkali, sugar, vegetable matter or other substances injurious to the finished product. Erosion and Sedimentation Control Houston, Texas

31 B. Water sources other than the local municipal domestic water supply must be approved by the Owner. C. If onsite reclaimed water sources are used, tanks and apprentices must be clearly marked with the words non-potable water. 2.5 SILT FENCE A. Geotextile fabric for Silt Fences must meet the TxDOT Departmental Material Specifications DMS 6230 Temporary Sediment Control Fence Fabric. 2.6 STRAW BALES A. Standard rectangular hay bales bound by baling wire, clean and dry 2.7 INLET PROTECTION BARRIERS A. Geotextile per 2.5 Silt Fence above. B. Hardwood Posts shall be 2x2 minimum length 4 feet. C. Net reinforced fence shall be 2 inch by 4 inch welded wire fabric mesh. The mesh support height shall be the equivalent height, or greater, of the geotextile fabric to be attached. 2.8 STABILIZED CONSTRUCTION ACCESS A. Materials to be per TxDOT spec section E.1 for Type ROCK FILTER DAM (Not Used) PART 3 - EXECUTION 3.1 GENERAL A. Protection 1. Protect benchmarks, monuments, existing structures, existing fences, existing roads, existing sidewalks, existing paving, existing curbs, and other features indicated on Drawings to remain, or not indicated to be removed, from damage and displacement. If damaged or displaced, notify Engineer and correct defects as directed. 2. Protect above and below grade utilities which are to remain. B. Preparation: Erosion and Sedimentation Control Houston, Texas

32 1. Use all means necessary to control dust on and near the work, and on and near off-site storage, and spoil areas, if such dust is caused by performance of the work of this Section, or if resulting from the condition in which Project Site is left by Contractor. 2. Moisten surfaces, as required, to prevent dust from being a nuisance to the public, neighbors, and concurrent performance of other work on Project Site. C. Install erosion control systems at the site's boundary at locations where stormwater runoff will leave the site prior to starting any clearing, stripping, or earthwork operations D. Minimize the time areas are to be exposed without vegetative cover. E. Properly dispose of solid waste, paints, solvents, cleaning compounds, etc. F. Store construction materials in designated areas away from drainageways and low areas. G. Provide portable toilets and properly dispose of sanitary sewage. H. Construct containment berms and utilize drip pans at fuel and liquid storage tanks and containers. 3.2 INSTALLATION OF EROSION CONTROL DEVICES A. Install erosion control devices to protect adjacent and downstream properties from damage and pollution resulting from erosion caused by the work of this Contract. 1. Implement erosion control measures indicated on drawings and additional erosion control measures necessary to prevent damage to adjacent and downstream properties. B. Install silt fence located along perimeter of site or grading limits immediately following site clearing operations specified under Division 31 Section Clearing and Grubbing. 1. Install silt fence fabric from a continuous roll for the length of the silt fence whenever possible to minimize the number of joints. a. Create joints in fabric by securely fastening fabric at the support post with overlap extending to the next post. 2. Drive support post into ground not less than 18 inches. 3. Excavate a 4 inch wide by 4 inch deep trench on up-slope side of silt fence. a. Line trench with silt fence fabric material. b. Backfill trench with soil or gravel. C. Install straw bale fence at completion of grading operations in affected area as indicated on drawings. 1. Install erosion control devices at storm sewer inlets immediately after completion of the storm sewer. 2. Place straw bales in a single row, lengthwise on the contour, and embedded 4 inches into soil. Erosion and Sedimentation Control Houston, Texas

33 3. Secure each individual bale in place by stakes or reinforcement bars driven through bales into the ground to a depth of not less than 18 inches. D. Install inlet protection barriers at curb inlets and at area inlets. E. Install straw bale fences as ditch checks in drainage ditches. F. Install Stabilized Construction Access per TxDOT specification C EROSION CONTROL SEEDING A. Exposed fill and stockpile areas shall be protected from windborne erosion if the phasing of the construction operations is anticipated to leave the exposed fill and stockpile areas unattended for 6 weeks or more. At completion of stockpiling operations, stockpiles shall be shaped and graded to drain. Provide a layer of mulch to all sides of the stockpile to protect the stockpile from windborne erosion. B. Areas designated on the drawings to be seeded shall be seeded in accordance to the Texas Department of Transportation Standard Specifications, Item 164, titled "Seeding for Erosion Control". Broadcast seeding method shall be used as described in TxDOT, Item unless otherwise instructed. C. Areas to be seeded with slopes steeper than 10H:1V shall also utilize a soil retention blanket as specified in TxDOT Item 169 Soil Retention Blanket. 3.4 TEMPORARY SWALES A. Temporary drainage swales shall be provided as required to carry drainage away from the work area to an approved outfall point. B. Unless otherwise shown on the drawings, swales shall be earthen "V" shaped channels graded to a sufficient depth and slope to carry the anticipated runoff, but at least two (2) feet deep with a slope of 0.1%. C. Swales not designated to remain in place at the completion of the contract shall be cleaned of any muck, debris and other unsuitable material and filled with approved fill before final grading operations begin. D. Swales shall have erosion control barriers as required in these specifications. 3.5 FILL AND CUT SLOPES A. Fill slopes in all cases shall be no steeper than 3:1 unless specifically stated on the plans or approved by the Owner's Geotechnical engineer. B. When cut slopes exceed 2:1 for depths over three (3) feet, proper bracing and shoring per OSHA requirements shall be used and maintained. Erosion and Sedimentation Control Houston, Texas

34 C. For permanent slopes, cut or fill, between 2:1 and 10:1, erosion protection shall be provided with hydromulch, seeding, sodding, or other method as approved. D. Where cut slopes of more than 5 feet deep, extend more than 100 feet in length, contractor shall provide a backfill drain at the top of the slope to ease in drainage and erosion control. 3.6 SEDIMENTATION BASINS (Not Used) 3.7 MAINTENANCE A. Check all erosion control measures after each rainfall event to ensure that they are in proper working order. 1. Immediately restore all measures to installed condition. 2. During the course of construction all temporary swales constructed for this contract shall be maintained so as to allow proper drainage from the construction area. Before Contractor leaves the site at the end of construction, all temporary swales must be reworked to meet final conditions as set forth in the drawings and specifications. 3. The Contractor shall assure that all sub work with other contractors at the site understand the importance of the erosion control features. The Contractor shall require all subcontractors to respect the function of the erosion control features and enlist their coordination in maintaining existing swales and ditches. B. Inspect silt and straw bale fences at least once a week. 1. Immediately replace damaged portions of the silt fences, including portions which have collapsed, contain tears, have decomposed, or have become ineffective. 2. Remove sediment deposits, as necessary, to provide adequate sediment storage and to maintain the integrity of fences. Dispose of accumulated sediment by spreading over upland areas of the site. C. Maintain erosion control devices in place, as specified, until completion of the work of this Contract. 1. At completion of work, inspect all systems, make necessary repairs, remove and dispose of all accumulated sediment, and turn completely operable systems over to Owner for continued maintenance. D. Where necessary for equipment and vehicular access to the work areas, adequately sized culverts shall be installed and maintained to provide the access without disturbing the site drainage. E. Sedimentation Basins (Not Used) 3.8 INSPECTIONS A. Inspect all erosion control systems and devices at least once every seven calendar days. Erosion and Sedimentation Control Houston, Texas

35 B. Inspect all erosion control systems and devices within 24 hours of the end of any storm which results in precipitation of 1/2 inch or more. C. During inspections, locations where stormwater leaves the site shall be inspected for evidence of erosion or sediment deposition. D. Correct deficiencies within three calendar days. E. Complete a report of each inspection. Report shall contain the following minimum information: 1. Inspector's name 2. Inspection date 3. Observations of the effectiveness of erosion control systems 4. Actions taken if necessary to correct deficiencies 5. Listing of areas where construction operations have permanently or temporarily stopped 6. Authorized signature END OF SECTION Erosion and Sedimentation Control Houston, Texas

36 SECTION LIME STABILIZATION PART 1 - GENERAL 1.1 SCOPE OF WORK A. This Section specifies the requirements for treating and stabilizing existing subgrade material or select fill material under pavements or site structures as shown on the drawings, by pulverizing, adding lime, and finishing to the lines and grades shown on the drawings and constructed as specified herein APPLICABLE PUBLICATION The following publications of the latest issues listed below, but referred to thereafter by basic designation only, form a part of this specification to the extent indicated by references thereto: A. Texas Department of Transportation 2004 Standard Specifications for Construction of Highways, Streets and Bridges (TxDOT): 1. Item Lime Treatment (Road Mixed). 2. Item 263 Lime Treatment (Plant Mixes) B. Texas Department of Transportation Departmental Material Specifications (DMS) latest edition. 1. DMS 6350 Lime and Lime Slurry C. American Society for Testing and Materials Standards (ASTM): 1. D e1 Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Efforts (12,400 ft-lbf/ft3 (600 kn-m/m3)) 2. D Standard Test Method for Density and Unit Weight of Soil in Place by the Sand- Cone Method. 1.3 RELATED WORK SPECIFIED ELSEWHERE A. Drawings and general provisions of the Contract, including A-procurement and Contracting Requirements, Division 00 and Division 01 apply to this section. B. Section Clearing and Grubbing C. Section Site Grading D. Section Asphalt Concrete Pavement E. Section Concrete Pavement Lime Stabilization Houston, Texas

37 1.4 DEFINITIONS A. Subgrade: The uppermost surface of an excavation, including excavation for trenches, or the top surface of a fill or backfill immediately below base course, pavement, or topsoil materials. B. Backfill: Soil material or controlled low-strength material used to fill an excavation. C. Base Course: The layer placed between the subgrade and surface pavement in a paving system. D. Geotechnical Engineer: Person or company contracted by the owner and/or through the architect to provide testing and onsite Geotechnical services during the construction schedule. 1.5 SUBMITTALS A. None required for this section. 1.6 PROJECT CONDITIONS Project is located within the existing UT Health and Science Center student housing campus located near the northwest corner of the intersection of Cambridge Road and El Paseo Street in Houston, TX. 1.7 QUALITY ASSURANCE A. Codes and Standards: Perform earthwork complying with requirements of authorities having jurisdiction. B. Testing and Inspection Service: Owner employ a qualified independent geotechnical engineering testing agency to classify proposed on-site and borrow soil materials to verify that soils comply with specified requirements and to perform required field and laboratory testing. Contractor responsible to coordinate with the testing agency prior to start of work requiring testing so as to minimize unnecessary cost or delays to the project. C. Testing: 1. Owner will retain and pay a qualified Geotechnical engineer to take all field samples and do all laboratory testing necessary to verify compliance of the work to these Specifications or as required by City or other regulatory agencies. The Geotechnical Engineer shall submit results of all testing done during the course of the work to the Owner, Architect, and Contractor. 2. Notify testing lab a minimum of 48 hours in advance of the time testing is required to satisfy requirements of this section. 3. Should testing specified above show work which does not satisfy these Specifications, the Contractor shall pay, through the Owner, for all additional tests required to determine the extent of work that is not satisfactory and for all additional tests necessary to demonstrate compliance with these specifications. Lime Stabilization Houston, Texas

38 4. All tests shall be performed by the Geotechnical Engineer in accordance with ASTM D 698, D1556, or other test method selected by Geotechnical Engineer. D. Certification: Note used. PART 2 - PRODUCTS 2.1 LIME SLURRY A. Lime slurry for use in treating the subgrade shall conform to the chemical and physical requirements listed in Tables 1 and 2 of TxDOT Departmental Material Specification (DMS) 6350 for Commercial Lime Slurry. Lime Slurry may be prepared at the job site or other Owner approved location by using Hydrated Lime or Quicklime as specified by chemical and physical requirements in Tables 1 and 2 of TxDOT Departmental Material Specifications (DMS) WATER A. Water used for mixing or curing shall be reasonably clean and free of oil, salt, acid, alkali, sugar, vegetable matter or other substances injurious to the finished product. B. Water sources other than the local municipal domestic water supply must be approved by the Owner. C. If onsite reclaimed water sources are used, tanks and apprentices must be clearly marked with the words non-potable water. 2.3 SOIL A. Soil should be a clayey type soil, free of organic material, large rocks and other unsuitable materials with a plasticity index greater than 15 and a liquid limit in excess of 30. The soil should not contain more than twenty percent sands or silts. PART 3 - EXECUTION 3.1 GENERAL A. Construction methods shall conform to the applicable specifications of the TxDOT specifications, Item 260, Lime Treatment. B. Lime shall be spread only on that area where the first mixing operations can be completed during the same working day. Lime Stabilization Houston, Texas

39 3.2 APPLICATION A. The percent of lime to the dry weight of the soil shall be a minimum of seven (7) percent. Refer to the Project Geotechnical Report. B. The lime shall be mixed with water in trucks with approved distributors and applied as a thin water suspension or slurry. C. The distribution of lime shall be uniformly placed in such quantity that all soil to be treated receives the minimum percentage of lime and successive passes made until the proper moisture and lime content is obtained. D. The distributor truck shall be equipped with an agitator which will keep the lime and water in uniform mixture unless the prescribed consistency can be otherwise maintained. If an agitator is not used, a standby pump shall be available at the site for agitating the lime and water in case of delays in dispersing the slurry. 3.3 MIXING A. The material and lime shall be thoroughly mixed by approved road mixers until a homogeneous, friable mixture of material and lime is obtained, free from all clods or lumps. B. Immediately after the "first mixing" operation, the mixture shall be brought to the proper moisture content and sealed with a light pneumatic rubber tire roller and left to cure for 1 to 4 days, as directed by the Owner. If rework is required to obtain compaction after 72 hours of the last mixing, add 25% of the specified rate of lime. C. After curing time the material shall be uniformly mixed. All clods shall be reduced in size by raking, blading, disking, harrowing, scarifying or other approved method. 3.4 COMPACTION A. Compaction of the mixture shall begin immediately after final mixing and in no case later than 3 calendar days after final mixing. B. The moisture content at time of compaction shall be at optimum to 4 percent above optimum. C. The mixture when used as pavement subgrade shall be compacted by sheepsfoot rollers or 25 ton pneumatic self-propelled rollers until a minimum density of 95 percent of Standard Maximum Density (ASTM D e1) is obtained. D. The mixture when used for support of a building slab or foundation shall be compacted by the same method above until a minimum density of 90 percent of Standard Maximum Density (ASTM D ) is obtained. Lime Stabilization Houston, Texas

40 3.5 FINISHED SUBGRADE GRADING A. Surface of the subgrade shall not show any deviation in excess of 1/4 inch above or one inch below established subgrade elevation. B. The surface shall be uniform and smooth without large clumps or voids. END OF SECTION Lime Stabilization Houston, Texas

41 SECTION TRENCH SAFETY PART 1 - GENERAL A. This Section is intended to provide specifications for the minimum requirements for trench safety. The Contractor shall endeavor to insure the safety of their employees working in and around trenches and other excavations in accordance with current Occupation and Safety Health Administration (OSHA) standards and in particular, Excavations, Trenching and Shoring, Federal OSHA Standards, 29 C.F.R. part 1926, Subpart P, as amended including Final Rule, published in Federal Register Vol. 54, No. 209 Tuesday October 31, 1989 and latest amendment thereto. These specifications outline minimum standards of construction safety to be followed, but should not be construed as the means, methods and operations of construction. Where the Contractor deviates from these outlined minimum standards, the Contractor is required to submit for approval by the Owner sealed engineering plans designed by a Registered Professional Engineer in the State of Texas showing the proposed method of trench protection. A copy of the approved design shall be kept at the site. 1.2 SCOPE OF WORK A. For all trenches in excess of five (5) feet of depth or for all trenches less than five (5) feet of depth in soils which will not stand up in vertical excavations, the Contractor shall either lay back the sides of the excavation, provide sheeting and shoring to hold the walls of the excavation in place, or use a trenching box meeting or exceeding the protection provided by the sheeting and shoring system. Trenches are defined by a horizontal width less than 15 feet. In all cases the method of trench wall protection shall be in conformance with the plans, details, and specifications or an Owner approved method designed and sealed by a Registered Professional Engineer. Owner's approval shall be permission to deviate from the specifications only and shall not be construed in any way to mean approval of the specific design, means or method of construction. The Contractor shall assume full responsibility for the system design the contractor uses, including those options presented in the contract documents and in these specifications. 1.3 RELATED WORK SPECIFIED ELSEWHERE A. Section Site Grading B. Section Trenching, Backfilling and Compaction C. Section Drainage PART 2 - PRODUCTS A. Materials used for sheeting, sheet piling, cribbing, bracing, shoring, underpinning, and other structural retaining systems shall be in good serviceable condition, of good quality, of a suitable condition and grade to perform the intended use. Wood shall be sound, free from large or loose knots, and of the proper dimensions. The Contractor shall be responsible for maintaining the systems in a manner consistent with the intended design and in a manner that will prevent exposure of workers to hazards. Trench Safety Houston, Texas

42 PART 3 - EXECUTION 3.1 GENERAL SAFETY REQUIREMENTS A. The work area shall be kept free of hazards to the employees. All surface encumbrances which may create a hazard shall be removed, supported or otherwise isolated as necessary to safeguard employees. B. The Contractor shall take special precautions to locate existing utilities and to protect those systems as required. The Contractor shall call the Utility Coordinating Committee as required 24 hours prior to excavating around existing utilities. C. The Contractor shall provide safe access and egress to excavations. Ramps or stairways shall be structurally sound and capable of providing a safe means of escape from the excavation. Trenches in excess of four (4) feet in depth shall have a safe means of egress from the trench spaced such that no more than 25 feet of lateral travel would be required to reach the egress system. D. The employees shall be protected from work place hazards such as vehicular traffic, falling loads, and hazardous atmosphere. Excavations shall be marked so that employees and equipment are clearly warned of the location of the excavations. Trenches shall be kept free of water accumulations that would present a hazard to employees. Adjacent structures shall be stabilized as necessary so as not to present a possible hazard to the employees. Equipment shall be kept sufficiently clear of excavations so as not to create a potential overburden stress to trench walls causing cave-ins. Safe access shall be provided with handrails where access over trenches is required. E. Emergency rescue equipment as required by OSHA shall be readily available at the site and shall be maintained to good working condition. F. Daily inspections of excavations, the adjacent areas, and the protective systems shall be made by a person or persons competent to make such inspections to keep the Contractor notified of unsafe conditions so that necessary precautionary actions can be taken. 3.2 TRENCH WALL LAYBACK A. General In areas where no pavement or other structural elements are to be constructed, the sides of the trenches over five (5) feet deep may be sloped to provide protection from cave ins. If written approval is given by the Owner, trenches beneath pavement or other structures may also be laid back. Backfill for laid back trenches shall be as provided for a vertical wall trench for the full width of the excavation. B. Layback Slope Requirements 1. The Contractor shall be responsible for providing the proper lay back slopes for all soil conditions encountered. Where soils data is provided for the Contractor's use, that information is intended as a sampling of the types of soils materials that may be encountered; however, the Contractor shall be diligent in observing the actual soil conditions as the work proceeds and shall be responsible for providing a safety system adequate to meet the minimum standards for the actual types of soils encountered. Special Trench Safety Houston, Texas

43 precautions shall be taken to monitor conditions when working in fill areas, areas subject to surcharge and areas exposed to vibrations from nearby equipment and machinery. 2. At the Contractor s option where a layback trench system is approved for use, the Contractor may layback the sides of the trench at a slope of one and one-half (1-1/2) feet horizontal to one (1) foot vertical without testing for the soil s stability. When this method is used, it does not preclude the removal of unsuitable materials encountered and replacement with suitable materials. This method shall not be used in unsuitable soils such as wet sands, silts, peat or in other areas which require special procedures, equipment and materials. 3. The Contractor may engage a competent person in the means of soil classification to determine the soil classification as a means of reducing the trench wall slopes. Layback slopes may be sloped up to the maximum allowable slopes as follows for the given types of soil. MAXIMUM ALLOWABLE SLOPES Soil Materials For Excavations Less than 20 Feet Deep Slope H:V Stable Rock Vertical (90 ) Type A-[b] 3/4:1 (53 ) Type B 1:1 (45 ) Type C 1 1/2:1 (34 ) Notes: a. Numbers shown in parentheses next to maximum allowable slopes are angles expressed in degrees from the horizontal. Angles have been rounded off. b. A short-term maximum allowable slope of 1/2H:1V (63 ) is allowed in excavations in Type A soil that are 12 feet (3.67 m) or less in depth. Short-term maximum allowable slopes for excavations greater than 12 feet (3.67 m) in depth shall be 3/4H:1V (53 ). c. Sloping or benching for excavations greater than 20 feet deep shall be designed by a registered professional engineer. 4. The types of soil given in paragraph 3.2.B are defined as follows: a. Stable Rock - Natural solid mineral matter that can be excavated with vertical sides and remain in tract while exposed. b. Type A - Cohesive soils with an unconfined compressive strength of 1.5 tons per square foot or greater. Examples of cohesive soils are: clay, silty clay, sandy clay, clay loam and in some cases, silty clay loam and sandy clay loam cemented soils such as caliche and hard pan are also considered Type A. However, no soil is Type A if: 1) The soil is fissured. 2) The soil is subject to vibration from heavy traffic, piling driving, or similar effects. 3) The soil has been previously disturbed. 4) The soil is part of a sloped, layered system where the layers dip into the excavation on a slope of four horizontal to one vertical or greater. Trench Safety Houston, Texas

44 5) The soil is subject to other factors that would require it to be classified as a less stable material. c. Type B - Soil that meets one of the following: 1) Cohesive soil with an unconfined compressive strength greater than 0.5 tons per square foot, but less than 1.5 tons per square foot. 2) Granular cohesionless soils including: angular gravel, silt, silt loam, sandy loam and in some cases, silty clay loam and sandy clay loam. 3) Previously disturbed soils except those which would otherwise be classified as Type C soil. 4) Soil that meets the unconfined compressive strength or cementation requirements for Type A, but is fissured or subject to vibration. 5) Dry rock that is not stable. 6) Material that is part of a sloped, layered system where the layers dip into the excavation on a slope less steep than four horizontal to one vertical, but only if the soil would otherwise be classified as Type B. d. Type C - Soil that meets one of the following: 1) Cohesive soil with an unconfined compressive strength of 0.5 tons per square foot or less. 2) Granular soils including: gravel, sand and loamy sand. 3) Saturated or submerged soil. 4) Submerged rock that is not stable. 5) Soil in a sloped, layered system where the layers dip into the excavation on a slope of four horizontal to one vertical or greater. 5. Unconfined compressible strength shall mean the load per unit area at which a soil will fail in compression. It can be determined by laboratory testing, estimated in the field using a pocket penetrometer, or other previously approved methods. 6. Wet soil shall mean soil that contains significantly more moisture than moist soil, but in such a range of values that cohesive material will slump or begin to flow when vibrated. Granular material that would exhibit cohesive properties when moist will lose those cohesive properties when wet. 7. Layered systems shall be classified in accordance with its weakest layer; however, each layer may be classified individually where a more stable layer lies under a less stable layer. 8. Previously classified material whose properties, factors, or conditions affecting its classification change in any way shall be reclassified as necessary and changes to the trench safety plan shall be accomplished before continuing any work in or near the trench where there may be potential danger to workers due to trench failure. 9. The slope of a laid back trench wall shall be less steep than the maximum allowable slope when there are signs of distress. The maximum allowable slope for a material in distress shall be 1/2 horizontal to one vertical or less steep than the maximum allowable slope for the material in a non-distressed condition. Distress shall mean a condition in which a cavein is imminent or likely to occur. 10. When surcharge loads from adjacent structures, stored material or equipment, operating equipment, or traffic are present, a competent person shall determine the degree to which the actual slope must be reduced below the maximum allowable slope, and shall assure that such a reduction is achieved. Trench Safety Houston, Texas

45 11. An adequate means of exit such as a ladder or steps shall be provided and located so as to require no more than 25 feet of lateral travel to exit the trench. 3.3 TIMBER SHORING A. General Timber shoring may be used as a means of trench protection from cave-ins in trenches that do not exceed 20 feet in depth. The timber shoring system may be used in lieu of sloping and benching systems, or in conjunction with those systems. Good judgment shall be used by the Contractor in selecting the proper system when alternative designs are given. B. Soil Classification The timber shoring system designs are subject to soil classifications outlined in 3.2.B.4 of this section. Classification shall be conducted by a competent person using the proper means and methods of classification as described in this section. C. Basis and Limitations 1. Dimension of Timber Members a. The sizes of the timber members shown in the details are taken from the National Bureau of Standards (NBS) report, "Recommended Technical Provisions for Construction Practice in Shoring and Sloping of Trenches and Excavations." In addition where NBS did not recommend specific sizes for members, member sizes are based upon an analysis of the sizes required for use by existing codes and an empirical practice. b. The required dimensions of the members listed in the tables refer to actual dimensions and not nominal dimensions of the timber. 2. Limitation of Application a. It is not intended that the timber shoring specification apply to every situation that may be experienced in the field. This data was developed to apply to situations that are anticipated to be present at the site. Where the system provided does not meet the requirement of the actual conditions in the field, the Contractor shall either notify the Owner of the situation and present an engineered solution designed and sealed by the Registered Professional Engineer, or shall notify the Owner of the unanticipated conditions and await instructions. b. When any of the following conditions are present, the members specified and shown in the details are not considered adequate. 1) When loads imposed by structures or by stored material adjacent to the trench weigh in excess of the load imposed by a two foot soil surcharge. Adjacent shall mean the area within a horizontal distance from the edge of the trench equal to the depth of the trench. 2) When vertical loads imposed on cross braces exceed a 240 pound gravity load distributed on a one foot section of the center of the cross brace. 3) When surcharge loads are present from equipment weighing in excess of 20,000 pounds. 4) When only the lower portion of a trench is shored and the remaining portion of the trench is sloped or benched unless: a) The sloped portion is sloped at an angle less steep than 3H:1V; Trench Safety Houston, Texas

46 b) The members are selected from the tables based upon the total trench depth from the top of the overall trench and not the toe of the slope. 3. Cross braces or trench jacks shall be placed in true horizontal position, be spaced vertically, and be secured to prevent sliding, falling or kickouts. 4. Backfilling and removal of trench supports shall progress together from the bottom of the trench. Jacks or braces shall be released slowly and, in unstable soil, ropes shall be used to pull out the jacks or braces from above after employees have cleared the trench. 5. An adequate means of exit shall be provided such as a ladder or steps and shall be located so as to require no more than 25 feet of lateral travel to exit the trench. 6. Where necessary due to wet soils or other similar conditions, the shoring system shall use tight sheeting such that material is contained behind the sheeting. 3.4 ALTERNATIVE SHORING SYSTEMS A. General Alternative shoring systems may be used when approved by the Owner. Steel, aluminum or other approved materials may be used in lieu of wood for shoring where the system is designed, constructed and maintained in a manner that will give equal to or greater protection than the wood system. B. Sheet Piling Sheet piling may be used when approved by the Owner to shore the sides of the trench. Sheet piles shall be removed at the completion of the work unless otherwise directed by the Owner. When piling is to remain, the piling shall be cut off at least three feet from the top of the excavation or at least three feet from the top of the proposed finished grades, whichever is lower. The sheet piling system shall be designed by a Registered Professional Engineer and shall provide equal or greater protection than the specified wood shoring system. Materials for the piling shall be approved by the Owner. C. Trench Boxes Trench boxes that provide equal or greater protection as the specified wood shoring system may be used. The Contractor shall be responsible for insuring the adequacy, maintenance, and design of the trench box used. The Contractor shall also be responsible for the proper use and operation of the trench box. D. Shield Systems 1. General a. Shield systems shall not be subjected to loads exceeding those which the system was designed to withstand. b. Shields shall be installed in a manner to restrict lateral or other hazardous movement of the shield in the event of the application of sudden lateral loads. c. Workers shall be protected from the hazard of cave-ins when entering or exiting the areas protected by shields. d. Workers shall not be allowed in trenches or shields when shields are being installed, removed, or relocated. Trench Safety Houston, Texas

47 2. Excavations of earth material to a level not greater than two feet below the bottom of a shield shall be permitted, but only if the shield is designed to resist the forces calculated for the full depth of the trench and there are no indications while the trench is open of a possible cave-in below the bottom of the shield. 3. Use of shields shall be subject to approval by the Owner. END OF SECTION Trench Safety Houston, Texas

48 SECTION FINE GRADING 1.0 GENERAL 1.1 Related Documents A. Drawings and general provisions of Contract, including General and Supplementary Conditions and Division-1 Specification Sections, apply to the work specified in this section. 1.2 Related Sections 1.3 Scope A. Lawns and Grasses: Section A. Machinery restrictions. B. Soil preparation for grass areas. C. Finished grading. D. Prevention of excessive weed growth in lawns. 2.0 MATERIALS 2.1 TOPSOIL A. Topsoil for all fine grading operations shall be classified as sandy loam, free of debris or any vegetative matter. 3.0 EXECUTION 3.1 GENERAL A. Finished grading shall be defined as placing and grading of additional soil that may be required to bring the grade to the required grades for lawns. Where practical and as directed, the use of heavy machinery shall be kept to a minimum. 3.2 PLACEMENT OF FINE GRADE MATERIALS A. Clear the subgrade of stones larger than 4 inches (4") in any dimension, and of concrete, wood, construction debris, and other deleterious matter. Excavate to a depth of 12 inches (12") all areas that have become saturated with oil, gasoline or bituminous products and backfill with clean earth. Fine Grading Houston, Texas Asakura Robinson Company

49 B. Import topsoil directly to site of deposition or stockpile new topsoil on site in quantity needed to produce the 2 depth after spreading. Protect topsoil piles from erosion with tarpaulins and limit boards. C. Spread topsoil to a minimum settled 2 depth required. Feather smoothly into finished grade at edges so as to blend with adjacent ground shapes. D. Exercise precautions to keep the topsoil friable and porous. Do not handle or work topsoil when it is excessively wet, or during a rainfall. Do not place topsoil on any subgrade that has not been loosened or tilled, or allowed for drainage. Loosen and till the full depth of the topsoil and re-till any areas that become unduly compacted by vehicular movement. 3.3 FINE GRADING A. The Contractor shall be responsible for minor adjustments to the finished subgrade if such treatment is required in the opinion of the Landscape Architect. B. Hand rake the surface, removing all clods and undesirable material greater than one half inch (1/2") from ground surface. Fill all low spots with specified materials and cut irregularities to the acceptance of the Landscape Architect. C. An acceptable fine grade shall be free from depressions greater than 6 inches (6") over any given space of 25' except at grade transitions which shall be gradual and even. D. During the finished grading operations, all swales and additional swales that may be required to drain areas shall be finished. In general, all grade adjustments shall be made so there are no areas that will have standing water. E. To prevent excessive weed growth in the lawn areas, the Contractor should be prepared to immediately install the lawn upon the completed and acceptable finished grade CLEAN UP AND PROTECTION A. After completion of fine grading and topsoiling operations, do not drive trucks or other heavy equipment over finished areas. B. Upon completion of the work, remove all debris and excess material from the site so that the area is left neat and clean. END OF SECTION Fine Grading Houston, Texas Asakura Robinson Company

50 SECTION OPERATION & MAINTENANCE OF PLANTING 1.0 GENERAL 1.1 Scope A. Maintenance required under this contract shall conform to the specifications and criteria in this section. Items included in this section include, but are not limited to, the following: 1.2 Contract Period 1. Mowing, edging and trimming of lawn areas 2. Application of pesticides, as required 3. Weeding, cultivating and cleaning of all plantings 4. Application of herbicides 5. Adjustment of irrigation clocks for weather and growth conditions 6. General site clean up. Removal of trash and products of maintenance 7. Hand watering of machine-transplanted trees 8. Truck watering of trees, turf, and shrubs via manual system A. These specifications shall govern all maintenance work by the contractor on completed, partially completed, and area to be completed of the project. Maintenance shall be commencing at the Notice to Proceed and terminating at 90 days (or as specified by owner) after the issuance of Notice of Substantial Completion. 1.3 Intent of the Contract A. It is the intent of the contract to provide the owner with a project site that is attractive in appearance, and to keep all plant materials and lawns in a healthy and vigorous condition. 1.4 Contractor's Performance A. The contractor shall perform all work as often as necessary to fulfill the spirit and intent of the contract. The workmen shall be neat in appearance, perform their work in a professional manner, keep noise to a minimum, and stage their work from a location on the site out of the way of the mainstream of the users. In general, the contractor's presence on the site shall be as inconspicuous as possible. 1.5 Neglect and Vandalism Operation and Maintenance of Planting Houston, Texas Asakura Robinson Company

51 A. Turf, shrubs, trees or plants that are damaged or killed due to contractor's operations, negligence, or chemicals shall be replaced at no expense to the owner. B. Sprinklers or structures that are damaged due to the contractor's operation must be replaced by the contractor promptly. C. All damage to, or thefts of landscape elements not caused or allowed by the contractor subsequent to the issuance of the Certificate of Substantial Completion shall be corrected by the contractor at the owner's expense, upon receipt of written authorization to proceed. D. Damage due to thefts or vandalism prior to the date of the Certificate of Substantial Completion shall be at the contractor's expense. 1.6 Emergencies A. The contractor shall answer emergency or complaint calls regarding conditions in landscaped areas regarding fallen trees or branches, or shrubs or trees that obstruct the driveways, and shall correct the problem or place warning signs and advise the owner of the need for major work to be performed. 2.0 MATERIALS 2.1 Machinery A. Machinery requirements listed under this section are not intended to be restrictions of specific manufacturers or models unless so stated. Specific mention of manufacturers is intended as a guide to illustrate the final product of maintenance operations desired. 1. Lawn Mowers a. Shall be of the rotary-type, in good working order, finely turned to protect the lawn from excessive exhaust fumes. b. Blades shall be sharp, to reduce shredding of the cut grass. 2. Lawn Edgers a. Shall be of a rigid or flexible blade-type that will produce a fine, clean edge where lawns meet walkways, pavements, or curbs. 3. Fertilizer Spreaders a. Cyclone-type spreader, or equal. b. No visible under lapping of applications will be permitted. 4. Pruning Tools a. Shall be maintained in good working order. Operation and Maintenance of Planting Houston, Texas Asakura Robinson Company

52 3.0 EXECUTION 3.1 General b. Cutting edges shall be sharp. c. Disinfect all tools when used for the removal of diseased limbs with a solution of Clorox and water, mixed at a 1:5 ratio. 5. Watering Truck & Pump a. Minimum 1200 gal. tank/pump. b. Pressure at nozzle: 35 PSI (1 1/2" outlet). A. All maintenance operations shall be performed by the contractor's own force, superintended by personnel familiar with the job. Subcontracting of maintenance work shall not be allowed. B. Maintenance period shall commence immediately upon the issuance of the contract. It will be the contractor's sole responsibility to maintain plantings in original intended condition throughout the maintenance period of this contract. C. Accidental damage to the landscape plantings beyond the control of the contractor shall be reported immediately to the owner. 3.2 Irrigation System A. Irrigation system maintenance shall generally be construed as any activity or activities necessary to keep the system 100% operational. Irrigation system maintenance shall include, but not be limited to: 1. Replacement of equipment damaged by contractor operations. 2. Repair of other equipment damaged or malfunctioning on a time and material basis. 3. Adjustment and cleaning of heads so as to correct miss directional throw, improper coverage and damage to equipment. B. The contractor shall monitor and program the irrigation controllers to maintain optimum moisture levels in all planted areas. C. Irrigation cycles shall be set to take place after 10:00 pm and prior to sunrise (4:00 am - 5:00 am), unless otherwise instructed by the owner, except during visits of grounds maintenance personnel. During such visits, the irrigation system may be operated as desired by those personnel. D. Irrigation cycles should gradually be reduced from September to the winter, in order to Operation and Maintenance of Planting Houston, Texas Asakura Robinson Company

53 3.3 Staking and Guying 3.4 Pruning generally reduce late season plant growth and vigor, and to stimulate hardening off and dormancy of plant material. A. Contractor shall maintain staking and guying of trees at all times, and shall be responsible for any damage to trees or plant materials caused by chafing or breaking of foliage or limbs coming in contact with stakes, ties, guys, eye bolts, or bracing materials. Periodically, adjust broken stakes and ties as needed. If ties are too tight, they must be replaced or adjusted. All labor and material costs shall be considered in base bid for time period up to Notice of Substantial Completion and / or completion of punch list items. Labor and material costs for post-substantial Completion time period (approx days after Notice of Substantial Completion; time length to be determined by owner) shall be bid separately as a line item. B. Trees and large shrubs that may require guys, stakes or special care during the winds and rains shall receive the required care prior to and immediately after anticipated and actual occurrences, to insure that no damage results to the plant material. A. Contractor shall prune regularly, as required. Remove dead wood and aesthetically balance the planting, as directed by the landscape architect. All suckers and undesired growth shall be removed immediately. B. Do not prune limbs from trunks more than 12" above ground per 1" caliper (min. 8"). C. Pruning of shrubs should create a uniformly dense plant. Selectively thin and tip back annually. Prune to enhance natural branching effect of plants. Do not change shape of shrubs by pruning. Refer to schedule. 3.5 Turf Maintenance A. Mowing 1. During periods of cool weather, mow at one and one-half inches (1 1/2"), but during hot weather should not be lower than two inches (2") from the soil. 2. Regular weekly mowing is strongly recommended. Never scalp the lawn, or cut more than one-third (1/3) of the existing top growth in one mowing. 3. Remove excessive clippings, never allowing clippings to remain on lawn surface for more than four (4) hours. B. Watering 1. Provide a regular, deep watering program. The established turf should not be kept wet, but should dry out under regular conditions. If it is hot or windy, water more often. Operation and Maintenance of Planting Houston, Texas Asakura Robinson Company

54 2. In very hot weather, a fast watering with fine spray will cool the turf zone and can supplement the regular deeper watering program. 3. In shaded areas caused by trees or shrubs, water more frequently because of the competition for soil moisture. 4. If lawn wilts (shows gray-brown), water more frequently. C. In areas of new planting and lawns, allow new lawn to grow over tree ball. Maintain height of grass at tree trunk with hand clippers. Do not use weed whips around tree trunks. 3.6 Manual Watering (Quick Coupler System) A. Water all plant material twice weekly or as necessary to maintain materials in thriving condition. Frequency may be reduced, as directed by the Landscape Architect during periods of wet weather. 3.7 General Clean Up container size water quantity 65 gallon 30 gallons 30 gallon 16 gallons 15 gallon 10 gallons 10 gallon 7 gallons 5 gallon 4 gallons 3 gallon 2 gallons 1 gallon 2 gallons Seedlings, 4 pot and plugs ½ gallon A. The contractor shall dispose of all waste materials or refuse from his operations off the property, except where other arrangements have been made with the owner. B. Keep all expansion and score joints free of any vegetation which may appear, and apply appropriate herbicide to discourage future growth in these areas. C. Leaves, papers, grass clippings or other debris shall be removed weekly, or at each visit from all areas. D. Remove dead animals from the site immediately, as they are encountered. 4.0 SCHEDULE 4.1 Schedules A. The schedule as included herein shall be used as a guide for the work specified, which may fall within the post-construction maintenance period. Should the contractor require an alteration of the schedule, contact the landscape architect. Operation and Maintenance of Planting Houston, Texas Asakura Robinson Company

55 SCHEDULE FUNCTIONS FREQUENCY Jan. Feb. Mar. Apr. May Jun. July Aug. Sept. Oct. Nov. Dec. Mowing Edging Debris Removal Pruning 1 1 Weed Control Beds Clean/Sweep Curbs/Gutters Overseed Rye 1* Index Irrigation Spray for Borers * Depending on Prevailing Weather END OF SECTION Operation and Maintenance of Planting Houston, Texas Asakura Robinson Company

56 SECTION CONCRETE PAVEMENT PART 1 - GENERAL 1.1 SCOPE OF WORK A. This Section specifies the requirements for forming and placing reinforced concrete curbs, pavement and sidewalks to the lines and grades shown on the drawings and constructed as specified herein. 1.2 APPLICABLE PUBLICATIONS The following specifications and standards of the latest issues listed below, but referred to thereafter by basic designation only, form a part of this specification to the extent indicated by the references thereto: A. Texas Department of Transportation 2004 Standard Specifications for Construction and Maintenance of Highways, Streets and Bridges (TxDOT). 1. Item Concrete Pavement 2. Item 421 Hydraulic Cement Concrete B. American Society for Testing and Materials Standards (ASTM): 1. D Standard Specification for Preformed Expansion Joint Filler for Concrete Paving and Structural Construction 2. A 653 Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) by the Hot-Dip Process 3. C 309 Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete 4. A 615 Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement 5. C 94 Standard Specification for Ready-Mixed Concrete 6. C 31 Standard Practice for Making and Curing Concrete Test Specimens in the Field 7. C 39 Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens 8. A 185 Standard Specification for Steel Welded Wire Reinforcement, Plain, for Concrete 9. D 698 Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Effort Concrete Pavement Houston, Texas

57 10. D 994 Standard Specification for Preformed Expansion Joint Filler for Concrete (Bituminous Typed) 11. C Standard Practice for Agencies Testing Concrete and Concrete Aggregates for Use in Construction and Criteria for Testing Agency Evaluation 12. E Standard Specification for Agencies Engaged in Construction Inspection, Testing, or Special Inspection 1.3 RELATED WORK SPECIFIED ELSEWHERE A. Section Site Grading B. Section Lime Stabilization C. Section Painted Pavement Markings D. Section Thermoplastic Pavement Markings 1.4 PROJECT CONDITIONS A. Traffic Control: Maintain access for vehicular and pedestrian traffic as required for other construction activities. B. Contractor to maintain access for the maintenance building. Coordination with the Owner is required for temporary driveway closure. 1.5 SUBMITTALS A. Product Data: For each type of manufactured material and product indicated. B. Design Mixtures: For each concrete pavement mixture. Include alternate mixture designs when characteristics of materials, Project conditions, weather, test results, or other circumstances warrant adjustments. C. Qualification Data: For testing laboratory D. Material Test Reports: From a qualified testing laboratory indicating and interpreting test results for compliance of the following with requirements indicated, based on comprehensive testing of current materials: 1.6 QUALITY ASSURANCE A. Manufacturer Qualifications: Manufacturer of ready-mixed concrete products who complies with ASTM C 94/C 94M requirements for production facilities and equipment. Concrete Pavement Houston, Texas

58 B. Concrete Testing Service: Engage a qualified independent testing laboratory to perform material evaluation tests and to design concrete mixtures. PART 2 - PRODUCTS 2.1 CONCRETE A. Cement, aggregates, admixtures, and water shall conform to the specifications of TXDOT, Item 421. Preparation of concrete mix shall be in accordance with article of TxDOT, Item 360 B. Maximum size of aggregate 1-1/2 inches. Maximum size aggregate on concrete curbs to be 3/8 inch. C. Slump shall range from 2 to 5 inches. D. Air entrainment concrete mixture shall have an air content by volume of 4.5 percent plus or minus 1.5%. E. Concrete shall be mixed in accordance with TxDOT, Item 421. F. Ready mixed concrete conforming to ASTM C 94 may be used. G. The concrete mix shall be designed by a commercial testing laboratory, and submitted for approval. 2.2 REINFORCEMENT A. Reinforcing steel shall meet the specifications of ASTM A615, Grade 60. Bars shall be deformed billet steel free of defects. 2.3 BOARD FILLER A. Filler board of selected stock. Use wood of density and type as follows: 1. Clear, all-heart cypress weighing no more than 40 pounds per cubic foot, after being oven dried to constant weight. 2. Clear, all-heart redwood weighing no more than 30 pounds per cubic foot, after being oven dried to constant weight. B. Board filler shall be free of defects which will impair their usefulness as expansion joint fillers. 2.4 PREFORMED BITUMINOUS EXPANSION BOARD A. Preformed bituminous expansion boards shall meet the specifications for ASTM D 994 and D Concrete Pavement Houston, Texas

59 2.5 JOINT SEALING MATERIAL A. Curb and Pavement joint sealing material shall meet the requirements and specifications of TxDOT Items 360.2F and 360.4D. B. Sidewalk joint sealing materials shall be NR-201Self Leveling, Traffic Grade and Traffic Loop Sealant as manufactured by Pecora or approved equal. 2.6 DEFORMED CONTRACTION JOINT METAL STRIPS A. Deformed contraction joint metal strips shall be 28 ga. steel, galvanized 1.25 oz. per square foot or heavier and meet the specifications of ASTM A CURING COMPOUND A. Curing compound shall conform to the specifications of ASTM C 309, Type 1 or Type 2, white pigmented. 2.8 LOAD TRANSMISSION DEVICES FOR EXPANSION AND CONTRACTION JOINTS A. Load Transmission devices shall be as detailed on plans and conform to the properties specified in ASTM A615, Grade 60 steel. 2.9 STEEL DOWEL BARS A. Steel dowel bars and steel reinforcement shall be deformed or smooth bars conform in properties to ASTM A 615 Grade 40. Unless otherwise shown on the plans all reinforcing steel shall be deformed bars, all dowel bars at joints shall be smooth bars, and all curb dowels shall be deformed bars. B. Greenstreak two component speed dowel system can be used at construction joints pending engineer approval. Product submittal required for approval. C. Greenstreak two component speed load system can be used at expansion joints pending engineer approval. Product submittal required for approval. PART 3 - EXECUTION 3.1 GENERAL A. The curb and sidewalk pavement shall be constructed to the lines and grades shown on the drawings. Concrete Pavement Houston, Texas

60 3.2 PAVEMENT A. Preparation of Subgrade 1. The subgrade shall be a previously prepared subgrade, stabilized if required, compacted to a minimum of 95% standard density ASTM D-698, and graded to the required section and grades shown on the drawings and as specified. 2. Rolling and sprinkling shall be performed to maintain the specified moisture content of the subgrade as necessary prior to placing the concrete curbs. 3. Refer to Section Site Grading for applicable specifications for materials and placement. B. Placing and Removing Forms 1. Forms shall be of wood or metal, properly treated to insure concrete does not adhere to the forms, straight, clean, free from warp or defect, and of sufficient depth. 2. The forms shall be so placed that when placed each form section will be firmly in contact for its whole length and base width and exactly at the established grade. 3. Any subgrade under the forms below established grade shall be corrected using suitable material, placed, sprinkled, and rolled. 4. Forms shall be securely staked and tightly jointed and keyed to prevent displacement. 5. Sufficient stability of forms to support equipment operated thereon and to withstand its vibration without springing shall be required. 6. Forms shall remain in place not less than 24 hours after concrete is placed. C. Joints in Concrete Pavement 1. Shall be constructed in the pavement slab at locations and according to details as shown on the drawings. Stakes, braces, brackets or other devices shall be used as necessary to keep the entire joint assembly in true vertical and horizontal position. 2. When prefabricated plastic strips are used to form joints, they shall be placed after the concrete surface has been leveled and before the finishing is completed. The strips shall be of a type specifically manufactured for the purpose of forming joints in concrete pavement and to the dimensions as required to form the specified joints. The strips shall be removed after the concrete has set per the manufacturer's recommendations. Any blemishes caused by the removal of the strips shall be repaired immediately using approved methods. D. Tie Bars and Load Transmission Devices shall be accurately placed and held securely (parallel to pavement surface and perpendicular to joint) during placing and finishing of pavement. E. Expansion Joints shall be constructed with board filler and sealed at top. Board filler must be perpendicular to plane of concrete slab. Alignment of joint shall not vary more than 1/4 inch in 10 feet. Concrete Pavement Houston, Texas

61 F. Reinforcing Steel shall be accurately placed as shown on drawings and secured in place. Each bar intersection shall be tied. All bars shall be supported on steel or plastic bar chairs. Laps shall be a minimum of twelve (12) inches and tied. Wire fabric may not be used in vehicular pavement. G. Concrete Placing and Finishing 1. Concrete not placed as herein prescribed within 90 minutes after mixing shall be rejected. 2. Concrete shall not be placed when temperature is below 40 degrees F and falling, but may be placed when the temperature is above 35 degrees F and rising, the temperature being taken in the shade and away from artificial heat. 3. Concrete shall not be placed before the time of sunrise, and shall not be placed later than will permit the finishing of the pavement during sufficient natural light. 4. Concrete shall be consolidated by a mechanical vibrator to remove all voids. Special care shall be exercised in placing and spading concrete against forms and at all joints to prevent the forming of honeycombs and voids and to prevent displacement of steel reinforcement and load transmission devices. 5. The concrete shall be struck off with an approved strike-off screed to such elevation that when consolidated and finished, the surface of pavement shall conform to the required section and grade. In no case shall the maximum ordinate from a 10 foot straight edge to the pavement be greater than 1/8 inch. 6. The strike template shall be moved forward with a combined transverse and longitudinal motion in the direction the work is progressing, maintaining the template in contact with the forms, and maintaining a slight excess of material in front of the cutting edge. 7. After completion of a strike-off, consolidation and transverse screeding, a hand-operated longitudinal float shall be operated to test and level the surface to the required grade. 8. Workmen shall operate the float from approved bridges riding on the forms and spanning the pavement. The longitudinal float shall be held in contact with the surface and parallel to the center line, and operated with short longitudinal strokes while being passed from one side of the pavement to the other. If contact with the pavement is not made at all points, additional concrete shall be placed if required, and screeded, and the float shall be used to produce a satisfactory surface. After a section has been smoothed so that the float maintains contact with the surface at all points in being passed from one side to the other, the bridges may be moved forward half the length of the float, and the operations repeated. 9. After completion of the straightedge testing, a pass with a burlap drag shall be made as soon as construction operations permit and before the water sheen has disappeared from the surface. This shall be followed by as many passes of the drag as required to produce the desired surface texture. 10. After completion of dragging and about the time the concrete becomes hard, the edge of the slab and joints shall be left smooth and true to line. H. Curing Concrete Pavement Houston, Texas

62 1. Concrete pavement shall be cured by protecting it against excessive loss of moisture for a period of not less than 72 hours from the beginning of curing operation. 2. Immediately after finishing operations have been completed, the entire surface of the newly laid concrete shall be covered and cured in accordance with the requirements of "Membrane Curing", TxDOT Item 360.4I. 3. Special care should be exercised to keep spraying curing compound out of pavement joints. 3.3 CURBS A. Dowelled on Curb 1. After curing the concrete pavement, doweled on curbs, using secure forms shall be constructed to the size shown on the plans. 2. Dowels may be placed in the pavement slab before the concrete has set, or placed in drilled holes using epoxy adhesive to secure the bars in place. 3. Pavement joints shall extend through the curbs. Expansion joint material shall be the same thickness, type and quality as specified for the pavement. 4. When sawed joints are provided, the placement of curb shall be delayed until all transverse joints are sawed. 5. Weakened plane joints shall be formed by inserting an asphaltic board strip cut to conform to the shape of the curb. 6. All joints should be tool finished after sufficient curing of the concrete. 7. The concrete, reinforcement and curing of the curbs shall conform to the requirements specified for the concrete pavement. 8. In finishing the curbs, a thin coating of mortar shall be worked into the exposed face of the curb in order to obtain a brush finish free of all blemishes and form or tool marks. 9. Curbs shall have a straightness tolerance of 1/8 inch in 10 feet, measured longitudinally along the back and face of the curb. 10. The top of the curb shall not vary vertically in height more than 1/8" when measured up from the concrete pavement. 3.4 SIDEWALKS A. Preparation of Subgrade 1. The subgrade shall be four (4) inches of compacted subgrade, compacted to at least 95% dry standard proctor ASTM D 698, placed in accordance with the elevations and section shown on the drawings. Concrete Pavement Houston, Texas

63 B. Forms 1. Forms shall be of wood or metal, straight, free from warp, and of sufficient depth to finish the work to the plan required thickness. 2. Forms shall be securely staked to line and grade and maintained in a true position during the depositing of the concrete. 3. Forms shall be properly treated to insure that the concrete does not adhere to the forms. C. Reinforcing Steel 1. Reinforcing steel, shall be number 6 gage wire fabric reinforcing steel per ASTM A-185 placed in position as shown on the plans. 2. Care shall be exercised in the work and operation to keep all steel in its proper location and off the ground. 3. Tie at all sheet overlaps and intersections. Support on steel or plastic bar chairs. 4. Do not stand on steel to pour and finish concrete. D. Construction Joints 1. Construction joints shall be placed where shown on the plans and where two lines of sidewalks intersect, where meeting existing sidewalk or driveway, and at intervals not to exceed 30 feet. Construction joints shall be a butt joint, not a keyway joint. E. Crack Control Joints 1. Crack control joints for all sidewalks other than exposed aggregate or other special finish or as noted otherwise on the plans shall be marked off 1/4" deep, transversely at intervals equal to the width of the sidewalk and along the centerline of sidewalks eight (8) feet in width and greater. 2. All edges shall be edged with a tool having a 1/4" radius. F. Joint Sealant 1. Joint sealant shall be placed in construction joints only where sidewalks meet structures and as shown on the plans. 2. In the areas identified on the plans for joint sealant replacement, Urexpan NR-200 two-part self-leveling polyurethane sealant shall be used and installed as per manufacturer s specifications. G. Concrete Placing and Finishing 1. Concrete shall be placed in the forms to the depth specified, thoroughly tamped and compacted, until the concrete mixture covers the entire surface. 2. The top shall then be struck off with a wood strike off board to a smooth finish. Concrete Pavement Houston, Texas

64 3. Surface shall then be floated and finished to a gritty texture with a wood hand float working in circular motion. H. Tolerances 1. The surface shall be checked with a 10 foot straightedge and any irregularities of more than 1/8" in 10 feet shall be corrected. I. Curing 1. Curing shall conform to the above paragraph 3.2.H. 3.5 APPLICATION OF JOINT SEALING COMPOUND A. Joints shall be thoroughly cleaned of loose scale, dirt, dust and curing compound. When necessary, existing joint material shall be removed to the depth as shown on the plans. B. Joints shall be filled to the full depth of the joint opening. Pouring shall be done in a neat and workman like manner to give satisfactory results. Sufficient joint sealer shall be poured into the joints so that upon the completion of the work the surface of sealer within the joint shall be 1/4" above top of the pavement surface. 3.6 TESTS A. Concrete Test Specimens 1. Test cylinders for compressive strength shall be taken and cured in accordance with ASTM C 31 and tested in accordance with ASTM C At least 3 cylinders shall be made for each day for each 100 c.y. of concrete or fraction thereof, placed. A testing laboratory for the tests shall be selected and paid for by the Contractor. 3. Laboratory technician will prepare concrete test cylinders. B. Testing of Concrete Surface 1. After finishing is complete and while the concrete is still workable, the surface shall be tested for trueness with an approved 10' steel straightedge. 2. The straightedge shall be operated from the side of the pavement placed parallel to the pavement center line and passed across the slab to reveal any high spots or depressions. 3. The straightedge shall be advanced along the pavement in successive stages of not more than 1/2 its length. A tolerance of 1/8" in 10' must be met. 4. Any correction of the surface required shall be accomplished by adding concrete if required and by operating the longitudinal float over the area. 5. The surface test with the straightedge shall then be repeated. Concrete Pavement Houston, Texas

65 3.7 OPENING PAVEMENT TO TRAFFIC A. The pavement shall be closed to all traffic, including vehicles of the Contractor, until the concrete is at least 7 days old or has attained a minimum average of 3000 psi compressive strength. B. Any damage to the pavement prior to acceptance by the Owner shall be repaired by the Contractor at no extra cost to the Owner. C. This does not relieve the Contractor from the normal liabilities and maintenance responsibilities, implied or otherwise, for the pavement or other items. END OF SECTION Concrete Pavement Houston, Texas

66 SECTION DECOMPOSED GRANITE PAVING 1.00 GENERAL 1.01 Related Documents A. Drawings and General Provisions of Contract, including General and Supplementary Conditions and Division -1 Specifications Sections apply to this Section.1.02 Related Sections 1.03 Scope A. Fine Grading: Section B. Excavation and Backfilling: Section A. Furnish all labor, tools, equipment, materials, transportation, and perform all operations necessary to proper execution and completion of site work in accordance with the drawings and Specifications Reference Standards A. Any reference to the Standard Specifications, or ASTM shall mean the current or latest editions. B. ASTM : American Society of Testing and Materials 1.05 Requirements of Regulatory Agencies A. All work and materials shall be in full accordance with the latest rules and regulations of the City of Houston, Texas. Nothing in these drawings or specifications is to be construed to permit work not conforming to these codes. Should the Contract Documents be at variance with the aforementioned rules and regulations, notify the Owner s Authorized Representative and get his instructions before proceeding with the work affected Inspection of Site A. Examine related work and surface before starting work on this Section. Report to the Owner s Authorized Representative, in writing, the site conditions which will prevent the proper provision of this work. Beginning the work on this section without reporting unsuitable conditions to the Owner s Authorized Representative constitutes acceptance of site conditions by Contractor. B. Any required or necessary removal, repair, or replacement of this work caused by unsuitable conditions shall be done at no additional cost to the Owner. Decomposed Granite Houston, Texas Asakura Robinson Company

67 1.07 Protection of Existing Conditions A. Contractor shall acquaint himself with all site conditions. He shall take the necessary precautions to protect existing site conditions including existing trees to be saved. Should damage be incurred, the Contractor shall repair the damage to it s original condition, or furnish and install equal replacement at his own expense, to the satisfaction of the Owner Coordination A. Coordinate andcooperate with other Contractors to enable the work to proceed as rapidly and efficiently as possible Approval A. Wherever the terms approve, approval, or approved are used in the specifications, they mean approval in writing by the Owner s Authorized Representative Submittals A. At least ten (10) days prior to beginning the work, the Contractor shall submit for approval samples and/or manufacturers latest catalog cuts and specifications of the following. Approved samples shall be standards for completing work: 1.11 Analysis of Samples and Test 1. Five (5) foot section of walkway. 2. Five (5) pound bag of representative material. 3. Submit sieve analysis of proposed material to ensure it meets grading requirements. 4. Submit sample of decompose granite and crushed limestone screenings for approval to ensure color will be compatible with project site. Sample shall be sufficiently large to illustrate clearly the functional characteristics, and full range of color and texture of the material. 5. Sieve analysis and color of decompose granite and crushed limestone screenings shall be approved in writing by the Owner s Authorized Representative before any material is delivered to the project site. 6. Prepare a sample finished walk section using all specified materials and edging. Samples shall be full width of walk, and length equal to 2X the width. Sample walk shall be approved in writing by the Owner s Authorized Representative. A. The Contractor shall advise Owner s Authorized Representative when work has begun. B. The Owner s Authorized Representative reserves the right to take and analyze samples of materials for conformity to specifications at any time. Decomposed Granite Houston, Texas Asakura Robinson Company

68 C. Contractor shall furnish samples, upon request by Owner s Authorized Representative. Rejected materials shall be immediately removed from the site and replaced at the Contractor s expense. Cost of testing of materials not meeting specifications shall be paid by the Contractor Project Conditions A. Use lightweight hauling equipment. Exercise care in using equipment, avoiding damage to adjacent plant and tree growth MATERIALS 2.01 Crushed Aggregate Screenings A. Clean, hard, durable particles or fragments of 1/4 minus select decomposed granite. Fines shall be evenly mixed throughout the aggregate. When produced from gravel, 50 percent, by weight, of the material retained on a No.4 sieve shall have one fractured face. Color to be approved by Contracting officer. B. The portion passing a No. 40 sieve shall have a maximum liquid limit of 25 and a maximum plasticity index of 7, as determined by AASHTO T89-81 and AASHTO T90-81, respectively. C. The portion retained on the No. 4 sieve shall have a maximum percentage of wear of 50 at 500 revolutions as determined by AASHTO T D. The decomposed granite shall be free from clay lumps, vegetable matter and deleterious material Grading Requirements Percentage of Weight Passing a Square Mesh Sieve AASHTO T11-82 and T27-82 Percent Percent Sieve Designation Passing Sieve Designation Passing No No No No No No Decomposed Granite Houston, Texas Asakura Robinson Company

69 No Soil Stabilizer A. Stabilizer, a non-toxic, colorless, odorless, non-staining, concentrated organic powder that binds soils and crushed aggregate screenings together, creating a natural appearing, firm walk surface. Stabilizer is manufactured and distributed by Stabilizer, Inc., 4832 East Indian School Rd., Phoenix AZ 85018, Tel: , Fax: Weed Control Fabric A. Typar # 3401 thermally spunbonded polypropylene, non-woven, thin geotextile weed control fabric, 4.0 oz / lineal yard weight (American Excelsior Co., 609 South Front Street, Yakima WA 98901, Tel: , or CSI Geotextile Fabric, 600 SE Assembly, Suite 100, Vancouver, WA , Tel: ), or equal. Needle punched material is not acceptable EXECUTION 3.01 Fine Grading A. Section Ground Surface Preparation A. Strip the top 8 inches of topsoil within the designated trail corridor and exhibit areas. Stockpile at on site location designated by the Owner s Authorized Representative to removed off site by contractor upon completion of work Subgrade Preparation 3.04 Forms A. Prior to placing decompose granite and crashed limestone screenings, shape, fill grade and compact the Subgrade. A. Contractor to layout trail on site for architects approval prior to construction Edges A. Trail edges should be sharp clean cut at a 90 degree angle. Any tearing of adjacent areas should be patch up to prevent erosion Weed Control Fabric Decomposed Granite Houston, Texas Asakura Robinson Company

70 A. Fabric shall be installed between the compacted subgrade and crashed limestone screening to prevent weeds from growing up through the crushed stone trail; preemergent chemicals may not be used. Place fabric across the entire width of trail surface to receive aggregate; over-lap ends of rolls a minimum of six (6 ) inches Soil Stabilizer A. Thoroughly pre-blend Stabilizer with the 1/4 minus crushed aggregate screenings, at the rate of 10 lbs. of Stabilizer per ton of aggregate screenings prior to placing of Stabilized mix. It is essential that Stabilizer be mixed thoroughly and uniformly through the crushed aggregate screenings to achieve a successful result. The Stabilizer locks the fines together, trapping the larger crushed aggregate screenings; Stabilizer does not act directly on larger aggregate screenings. Blending is best accomplished with a truck-mounted mixer; a portable mechanical mixer may be used. Blend for a minimum of 15 minutes prior to placing on subgrade. Refer to manufacturer s recommendations for recommended rates per decomposed granite material for both pedestrian and vehicular paving. B. Drop spreading of Stabilizer over crushed aggregate screenings and mixing Stabilizer by rototilling is not acceptable. C. Soil stabilizer shall not be applied during, just prior to, or immediately following rainfall Placed Crushed Aggregate Screenings A. After pre-blending, place the stabilized crushed aggregate screenings on prepared subgrade, and rake smooth using a steel tine rake to desired grade and cross section Watering A. Water heavily to achieve full depth moisture penetration of the trail mix. Watering is best accomplished using a garden hose with spray nozzle set to a coarse spray; pressure should not disturb leveled trail surface. A one-hour application at a rate of +/- 20 gpm per 1,000 sq. ft. of trail mix surface seems to achieve the desired full depth moisture penetration. Water activates stabilizer ; consequently, it is essential that the full depth of Stabilized trail material is saturated. Test for the depth of water penetration by random inspection of trail cores. After inspection, fill core holes with material removed smooth and hand tamp to match adjoining trail surface grade. (Let watered trail mix stand 6-24 hours until surface water is no longer present; the trail mix should then be moist not wet) Compaction A. While the trail mix is still thoroughly moist, roll with a heavy lawn roller (minimum 225 pounds and maximum 30 inch width) to achieve finish grade and initial compaction. Hand tamp edges around benches, signposts, interpretive exhibits, etc. Use a heavy (1 ton minimum) small rider, after having initially used the lawn roller, to obtain the desires final dense, smooth, uniform texture. Do not use wackers or vibratory rollers; the trail mix will not harden for weeks after vibration Finishing Decomposed Granite Houston, Texas Asakura Robinson Company

71 A. After finished compacted trail surface has been achieved, compact adjacent shoulder to match existing undisturbed ground, and slope to required grade and cross section for proper drainage Inspection A. Finished surface of trail shall be smooth, uniform and solid. Compacted trail material shall be firm all the way through with no spongy areas. Loose material shall not be present on the surface initially. After the first year of use, a minor amount of loose material is expected on the surface. B. Loose gravel on the surface, or unconsolidated crushed aggregate screenings below the surface, is evidence of improper bonding due to poor mixing or insufficient watering. Test the loose material for adequate Stabilizer by wetting, then tamping, and allowing it to dry. If the material still is unconsolidated, Stabilizer did not get mixed adequately throughout the crushed aggregate screenings. If the material now is solid, initial watering was insufficient. Cracking or sponginess is evidence of excessive Stabilizer in the mix. C. Unconsolidated areas shall be dug out, and be replaced with new crushed aggregate screenings with a high proportion of fines meeting the grading requirements of Section 2.2 above, pre-blended with Stabilizer per the procedures listed under Section 3.07A above. Patched areas then shall be wetted thoroughly and rolled smooth. Patching shall be completed prior to any trail smoothing required. D. Any significant irregularities shall be smoothed out prior to final acceptance of work. Smoothing shall be accomplished by rewetting / saturating rough areas thoroughly, and then rolling the trail again with heavy roller ( lbs. powered by walk-behind or small rider) Wackers are not recommended. E. Final thickness of completed trail shall not vary more then 1/2 inch from dimension indicated. Measurements may be taken by means of test holes taken at random in finished trail surface. Correct any variations in the thickness beyond the allowable 1/2 inch by repeating the procedures listed under Sections above. F. Final width completed trail shall not vary more than 1.2 inch from typical dimension indicated. Measurements may be taken at random cross sections in the finished trail surface. G. No edges of weed control fabric shall be exposed Clean Up A. All debris resulting from the work of this Section shall be removed from the site. END OF SECTION Decomposed Granite Houston, Texas Asakura Robinson Company

72 SECTION PAINTED PAVEMENT MARKINGS PART 1 - GENERAL 1.1 SCOPE OF WORK A. This Section pertains to the application of pavement marking as indicated on the drawings and as specified herein. 1.2 APPLICABLE PUBLICATIONS A. Harris County Public Infrastructure Department Engineering Division Specifications for Roads and Bridges within Harris County, Texas, published April 1988 latest revision February B. Drawings and general provisions of the Contract, including General and Supplemental Conditions and Division 01 Specifications apply to this section. 1.3 SUBMITTALS (NOT USED) 1.4 PROJECT CONDITIONS A. The Contractor shall provide adequate public protection at all times, by erecting fences, barricades, and etc., as necessary. B. All work shall be in accordance with the Texas Manual on Uniform Traffic Control Devices latest edition. C. Proceed with pavement marking only on clean, dry surfaces and at a minimum ambient or surface temperature of 40 degrees F (4 degrees C) for oil-based materials, 50 degrees F (10 deg C) for water-based materials, and not exceeding 95 degrees F (35 degrees C). 1.5 DELIVERY, STORAGE, AND HANDLING A. Deliver pavement-marking materials to Project site in original packages with seals unbroken and bearing manufacturer's labels containing brand name and type of material, date of manufacture, and directions for storage. B. Store pavement-marking materials in a clean, dry, protected location within temperature range required by manufacturer. Protect stored materials from direct sunlight. Painted Pavement Markings Houston, Texas

73 PART 2 - PRODUCTS 2.1 PRODUCTS A. Materials shall consist of paint and glass beads. Paint for striping shall conform to Harris County Engineering Specifications Item 676 latest edition Glass reflective beads for traffic paint shall conform to Harris County Engineering Specification Item 662 latest edition PART 3 - EXECUTION 3.1 APPLICATION A. Do not apply pavement-marking paint until layout, colors, and placement have been verified with Architect. B. Allow paving to age for 7 days before starting pavement marking. C. The pavement surface to receive the striping shall be thoroughly cleaned of all dirt, organic growth, oil, grease, or other materials that will prevent adhesion of the paint to the roadway surface. D. Paints shall be applied by brush, spray, or flow methods to clean and dry surfaces with surface temperature 50 F or above. 1. Paint shall have net film thickness of inches with a uniform cross section. Minimum thickness of inches measured in the dry condition prior to adding any glass reflective spheres. 2. Paint shall be applied no sooner than 14 days after seal coat has been applied. 3. Paint shall be applied in one (1) coat. 4. Paint shall be applied as shown on drawings. 5. Glass spheres or reflectorized granules shall be applied, before the paint sets or dries, evenly at a rate of 6 pounds of glass spheres or 1.7 pounds of reflectorized granules per gallon of paint. END OF SECTION Painted Pavement Markings Houston, Texas

74 SECTION THERMOPLASTIC PAVEMENT MARKINGS PART 1 - GENERAL 1.1 SCOPE OF WORK A. This item includes white thermoplastic pavement markings for crosswalks, stop lines, lane lines, and other types of traffic controls. 1.2 RELATED WORK SPECIFIED ELSEWARE A. Section Concrete Paving 1.3 APPLICABLE PUBLICATIONS A. ASTM E 28 - Standard Test Methods for Softening Point of Resins Derived from Naval Stores by Ring-and-Ball Apparatus. B. ASTM G Standard Practice for Operating Carbon Arc Light Apparatus for Exposure of Nonmetallic Materials. C. ASTM G Standard Practice for Operating Enclosed Carbon Arc Light Apparatus for Exposure of Nonmetallic Materials. D. TxDOT Tex-822-B - Determining Refraction Index of Glass Beads. E. TxDOT Tex-826-B - Water Absorption Test of Beads. F. TxDOT Tex-839-B - Determining Color in Reflective Material. G. TxDOT Tex-851-B - Evaluating the Abrasion Resistance of Pavement Marking Material. 1.4 SUBMITTALS A. Product Data: Submit Manufacturer's literature indicating product specifications and instructions for handling, installation, and curing. Include performance test data sheets for each product. B. Submit material supplier's certification of compliance with specifications. C. Chemical Analysis: Submit infrared analysis of Type B resins for each manufacturer used. Thermoplastic Pavement Markings Houston, Texas

75 PART 2 - PRODUCTS 2.1 MATERIAL REQUIREMENTS A. General Requirements. Type B thermoplastic pavement marking material for use on either asphaltic or Portland cement concrete surfaces. Clearly mark each container to indicate color, weight, type of material, and lot or batch number (consider lot or batch as each individual mix or blend that produces finished product ready for use). Package material in either suitable corrugated containers or thermal degradable plastic bags to avoid sticking during shipment or storage. B. Thermoplastic markings shall not be slippery when wet, nor exhibit tacky, exposed surface. Cold ductility of material shall permit normal road surface expansion and contraction without chipping or cracking. Markings shall retain their original color, dimensions, and placement under normal traffic conditions at road surface temperatures of 158 F and below. C. Prime and filler pigments shall pass U.S. Standard sieve No. 230 ( inch opening) when washed free of resins by solvent washing, and meet following specific requirements for each pigment. 1. Prime Pigments: White pigment shall be Rutile Titanium Dioxide. 2. Filler Pigment: Filler pigment shall be calcium carbonate, 95% purity. D. Binder 1. Type B - Alkyd: Use binder consisting of mixture of resins, at least one of which is solid at room temperature, and high boiling point plasticizers. At least one-third of binder compositions shall be a maleic-modified glycerol ester 012 Rosin and shall be no less than 8% by weight of entire material formulation. E. Glass Traffic Beads: the total silica used in formulation shall be in form of glass traffic beads meeting the following requirements: 1. Manufacture. Use glass traffic beads having the following characteristics: a. Manufactured from glass; b. Spherical in shape; c. Free of sharp angular particles; d. Free of particles showing milkiness, surface scoring, or surface scratching; e. Water white in color. 2. Contaminants. Use glass traffic beads having the following characteristics: a. Containing less than 1/4 of 1% moisture by weight; b. Free of trash, dirt, etc.; c. Showing no evidence of objectionable static electricity when flowing through regular traffic-bead dispenser. 3. Gradation: a. Sieve Analysis. Glass traffic beads shall meet following gradation requirements: Openings U.S. Standard Sieves Percent Passing No No Thermoplastic Pavement Markings Houston, Texas

76 No No b. Irregular Particles: Glass traffic beads, retained on screen used to determine gradation requirements, shall not contain more than 30% (by weight) irregular particles. 4. Index of Refraction: Glass traffic beads, when tested by TxDOT Tex-822-B, using liquid immersion method at 25 C (77 F) shall show index of refraction within range of 1.50 to Wetting. Use glass traffic beads capable of being readily wet with water when tested in accordance with TxDOT Tex-826-B. 6. Stability. Use glass traffic beads showing no tendency toward decomposition, surface etching, change in retro reflective characteristics, or change in color after: a. One hour exposure to concentrated hydrochloric acid at 25 C (77 F); b. Twenty-four-hour exposure to weak alkali; c. One hundred hours of Weather-O-Meter exposure, in accordance with ASTM G 152 and ASTM G FINISHED PRODUCT REQUIREMENTS A. Physical Characteristics. Finished thermoplastic pavement markings material shall be free flowing granular material, unless otherwise shown on Drawings. Material shall remain in free flowing state in storage at temperatures of 100 F or less. Materials shall be readily sprayed through nozzles commonly used on thermoplastic spray equipment at temperatures between 205 and 218 C (401 to 425 F). B. Toxicity. At temperatures up to and including 230 C (446 F), materials shall not give off fumes which are toxic and otherwise injurious to persons, animals, or property. C. Material shall not break down or deteriorate when held at 205 C (401 F) for 4 hours. D. Temperature versus viscosity characteristics of material in plastic state shall remain constant throughout up to four reheatings at 205 C (401 F) and from batch to batch. E. Material shall not be adversely altered by contact with sodium chloride, calcium chloride, or other similar chemicals on, or used on, roadway surface; by contact with oil content of pavement materials, or by contact from oil dropping from traffic. F. Softening Point. After heating thermoplastic materials for two hours at 204 C (400 F) Type B Alkyd material shall have softening point greater than 90 C (194 F) when tested in accordance with ASTM E 28-58T - Ball and Ring Method. G. Color. CIE chromaticity coordinates of materials, when determined in accordance with TxDOT Tex-839-B, shall fall within area having following corner points and shall meet following luminosity requirements. CIE CHROMATICITY COORDINATE CORNER POINTS Point 1 Point 2 Point 3 Point 4 Thermoplastic Pavement Markings Houston, Texas

77 Color X Y X Y X Y X Y Luminosity White {tc \ Min 65 "White} Material shall meet above specified color requirements, before and after 70 hours of exposure in Weather-O-Meter (Atlas, Sunshine Type) fitted with (18 minutes of sunshine and rain and 102 minutes of sunshine) cyclic gear. Prepare panels for testing with material as supplied. H. Abrasion. Thermoplastic pavement marking materials shall have loss between 4.0 and 12.0 grams when tested for abrasion in accordance with TxDOT Tex-851-B. Test according to steps 1 through 8 of procedure utilizing following test parameters: Test distance: 5 inches Blast pressure: 40 psi Sample angle: 10 degrees and 122 gram blast media Blast Media: 1200 grams I. Uniformity. Manufacture material so that, when sampled in accordance with TxDOT Manual of Testing Procedures, 100-gram sample will be representative of batch or lot of material. J. When applied 1/8 inch thick, setting time shall not exceed characteristic straight-line curve, lower limit of which is four minutes at 59 F road surface temperatures, and upper limit of which is ten minutes at 90 F road surface temperature. Both temperatures are to be measured at maximum relative humidity of 90%. 2.3 FORMULAE A. Type B - Alkyd Thermoplastic Marking: Pounds Binder Titanium Dioxide Calcium Carbonate Glass Traffic Beads TOTAL 100 PART 3 - EXECUTION 3.1 GENERAL A. Spray apply pavement marking or extrude hot to pavement surface unless application method is specified on Drawings. B. Provide continuous mixing and agitation of material. Provide clean, square, marking ends. Do not use pans, aprons, or similar appliances which dye overruns. C. Provide thermometer capable of measuring temperature of pavement marking material. Thermoplastic Pavement Markings Houston, Texas

78 D. Use automatic bead dispenser attached to pavement marking equipment in manner that beads are dispensed uniformly and almost instantly upon marking as marking is being applied to road surface. Rate of application shall be sufficient to achieve retro-directive reflective characteristics specified. Provide automatic cut-off control for bead dispenser, synchronized with cut-off of pavement marking equipment. E. Place markings in accordance with approved traffic control plan so that minimal interruption to traffic flow is achieved. Protect newly-installed pavement markings from damage by traffic. F. Apply pavement markings onto clean, dry pavement having road surface temperature above 60 F for Portland cement concrete surface and above 50 F for asphaltic surface. When pavement marking application is by spray and operations cease for five or more minutes, flush spray head by spraying pavement marking material into pan or similar container until material is proper temperature for application. G. Use markings that are completely reflectorized internally and externally. H. Use crew experienced in work of installing pavement markings and supply all equipment and materials necessary for placement of pavement markings. I. Apply material within temperature limits recommended by manufacturer. J. Prior to placement of thermoplastic material, properly prepare pavement with primer. 3.2 LAYOUT A. Place pavement markings in proper alignment with guidelines established on roadway. Do not deviate from alignment established greater than two inches. Do not deviate in alignment of marking being placed greater than one inch per 200 feet of marking and do not deviate abruption. B. Place additional markings required to achieve alignment specified throughout both straight and horizontally curved sections of roadway. Additional markings placed on roadway for alignment purposes shall be temporary in nature and shall not establish permanent marking on roadway. Materials used for alignment markings and equipment used to place markings shall be approved by Engineer. 3.3 SURFACE PREPARATION A. Clean pavement by sandblasting and prepare in accordance with recommendations of thermoplastic material manufacturer and to satisfaction of Engineer, prior to placement of markings. Surface scarification can be used with prior approval of Engineer. B. Use cleaning methods approved by Engineer that completely remove contaminants, loose materials, and conditions deleterious to proper adhesion. Do not clean Portland cement concrete surfaces by grinding. C. Prepare Portland cement concrete surfaces further after cleaning by completely sealing with epoxy or methyl methacrylate sealer, as recommended by thermoplastic material manufacturer. Placed sealer sufficiently in advance of thermoplastic to allow release of all solvents. Thermoplastic Pavement Markings Houston, Texas

79 D. Prime asphaltic surfaces with sealer, as recommended by thermoplastic material manufacturer based on surface conditions. Include adhesive or adhesion promoter when asphaltic surfaces exhibit polished aggregate. 3.4 INSTALLATION A. Install in widths of 4, 6, 8, or 12 inches, or shaped otherwise as shown on Drawings. Tolerances in width shall not exceed 1/8 inch. Tolerance shall not exceed 1/4 inch in case of undulation in pavement. B. Material shall not prohibit adhesion of other thermoplastic markings if, at some future time, new markings are placed over existing materials. C. Maintain uniform thickness of each pavement marking. Minimum thickness of markings, as measured above plane formed by pavement surface, shall not be less than 1/8 inch (125 mils), unless shown otherwise on Drawings. Maximum thickness shall be 3/16 inch. Supply device, approved by Engineer, to measure thickness of applied extruded markings. 3.5 TESTING A. Maintain uniform cross section, density, quality, and thickness for markings. Markings shall be uniform throughout their thickness. Use applied markings that are 95% free of holes and voids, and free of blisters for minimum of 60 days after application. END OF SECTION Thermoplastic Pavement Markings Houston, Texas

80 SECTION HYDROMULCH SEEDING PART 1 - GENERAL 1.1 SCOPE A. Refer to the Drawings, Schedules and Details for type and locations of work required herein. Furnish all labor, materials, equipment and supervision for the installation of items included within these specifications. Such work includes, but is not limited to the following: 1. Furnishing and applying hydromulch seeding including all materials and equipment required for the specified method of lawn installation. 2. Site cleanup. 3. Maintenance and guarantee. 1.2 APPLICABLE PUBLICATIONS A. The following publications of the latest issues listed below, but referred to thereafter by basic designation only, form a part of this specification to the extent indicated by references thereto: 1. Texas Department of Transportation 2004 Standard Specifications for construction of Highways, Street and Bridges (TxDOT). a. Item Sodding for Erosion Control b. Item Seeding for Erosion Control 1.3 RELATED WORK A. Section Site Grading. B. Section Erosion and Sedimentation Control 1.4 QUALITY ASSURANCE A. Requirements of Regulatory Agencies: 1. Perform Work in accordance with all applicable laws, codes, and regulations required by authorities having jurisdiction over such work and provide for all inspections and permits required by Federal, State, and local authorities in furnishing, transporting, and installing materials. 1.5 SUBMITTALS A. Samples: Hydromulch Seeding Houston, Texas

81 1. The Owner reserves the right to request samples of materials for conformity to specifications at any time. Contractor shall furnish samples upon request. Rejected materials shall be immediately removed from the site at Contractor's expense. Cost of replacement of materials not meeting the specifications shall be paid by Contractor. 2. Typical requests from the owner may include copies of manufacturers literature, certifications, or laboratory analytical data for the following items: a. Fibre Mulch. b. Tank Mix Fertilizer. c. Top Dress Fertilizer. 1.6 SCHEDULE A. Submit a proposed work schedule to the Owner for approval at least fifteen (15) days prior to start of work under this Section. After approval, no modification shall be made to this schedule without written authorization by the Owner. B. In general, the work shall proceed as rapidly as the site becomes available, consistent with normal seasonal limitations for planting work. 1.7 PRODUCT DELIVERY, HANDLING AND STORAGE A. Furnish standard products in manufacturer's standard containers bearing original labels showing quantity, analysis and name of manufacturer. B. Submit written requests for inspections to the Engineer at least seven (7) days prior to anticipated inspection date. PART 2 - MATERIALS 2.1 SEED A. All seed used shall be labeled in accordance with U.S. Department of Agriculture Rules and Regulations under the Federal Seed Act in effect on the date of Invitation for Bids. All seed shall be furnished in sealed standard containers unless exception is granted in writing by the Engineer. Seed which has become wet, moldy, or otherwise damaged in transit or in storage will not be acceptable. The minimum percentage by weight or pure live seed in each lot of seed shall be as follows and seed shall be planted at the rate per acre indicated under pure live seed required per acre. Kind of Seed Minimum % Pure Live Seed Required Pounds Pure Live Seed Required Per Acre Bermuda Grass 85 7 K.R. Bluestem 85 1 Bahia Grass (Pensacola) 85 9 Note: % Pure Live Seed = (% Purity) X (% Germination) Hydromulch Seeding Houston, Texas

82 B. Weed seed shall not exceed ten (10%) of weight of the total of pure live seed and other material in the mixture. Johnson grass, nut grass, or other noxious weed seed will not be allowed. C. Source - Quality Control 1. Seed: The Contractor must follow the Federal Seed Act with respect to interstate commerce and transportation. Each lot of seed may be re-sampled and retested in accordance with latest Rules and Regulations under the Federal Seed Act at the discretion of the Owner. The seed retests will be conducted by a testing laboratory allowed by the State of Texas Department of Agriculture Seed Control Office. Material found to be below specified content levels will be at the contractor s responsibility to correct by removing and replanting and/or additional plantings. 2.2 FERTILIZER FOR TANK MIX A. Shall be grade, pelleted, uniform on composition, free-flowing, and suitable for application with approved equipment. The fertilizer shall be delivered to the site in bags or other convenient containers, each fully labeled, conforming to the applicable state fertilizer laws, and bearing the name or trademark and warrant of the producer. 2.3 WOOD CELLULOSE FIBER MULCH A. Wood Cellulose fiber mulch, for use with the hydraulic application of grass seed and fertilizer, shall consist of specially prepared wood cellulose fiber. It shall be processed in such a manner that it will not contain germination of growth inhibiting factors. It shall be dyed a green color to allow visual metering of its application. The wood cellulose fibers shall have the property of becoming evenly dispersed and suspended when agitated in water. When sprayed uniformly on the surface of the soil, the fibers shall form a blotter-like groundcover which readily absorbs water and allows infiltration to the underlying soil. Weight specifications from suppliers for all applications shall refer only to air dry weight of the fiber, a standard equivalent to eighteen (18%) percent moisture. The mulch material shall be supplied in packages having a gross weight not in excess of 100 pounds and be marked by the manufacturer to show the dry weight content. Suppliers shall be prepared to certify that laboratory and field testing of their product has been accomplished and that meets all of the foregoing requirements. 2.4 WATER A. Water used for mixing or curing shall be reasonably clean and free of oil, salt, acid, alkali, sugar, vegetable matter or other substances injurious to the finished product. B. Water sources other than the local municipal domestic water supply must be approved by the Owner. If onsite reclaimed water sources are used, tanks and apprentices must be clearly marked with the words non-potable water. Hydromulch Seeding Houston, Texas

83 2.5 SLURRY MIX COMPONENTS PER ACRE A. Wood Cellulose Fiber Mulch = 2,000 pounds B. Grass Seed = (as specified) C. Fertilizer ( ) = 800 pounds 2.6 TOP DRESS FERTILIZER A. (Delayed Application) Complete fertilizer, fifty (50%) percent of the nitrogen to the derived from natural organic sources or urea-form. Available phosphoric acid shall be from superphosphate, bond, or tankage. Potash shall be derived from muriate of potash containing sixty (60%) percent potash: 1. 16% Nitrogen 2. 6% Phosphoric Acid 3. 8% Potash PART 3 - EXECUTION 3.1 HYDROMULCH SEEDING ON PREPARED FINISHED GRADE A. Bed Preparation: Immediately after the finished grade has been approved, begin hydroseeding operation to reduce excessive weed growth. B. Special Mulching Equipment and Procedures: Hydraulic equipment used for the application of fertilizer, seed, and slurry of prepared wood fiber mulch shall have a built-in agitation system with an operating capacity sufficient of agitate, suspend, and homogeneously mix a slurry containing up to forty (40) pounds of fiber plus a combined total of seventy (70) pounds of fertilizer solids for each one hundred (100) gallons of water. The slurry distribution lines shall be large enough to prevent stoppage. The discharge line shall be equipped with a set of hydraulic spray nozzles which provide even distribution of the slurry on the slopes to be seeded. The slurry tank shall have a minimum capacity of eight hundred (800) gallons and shall be mounted on a traveling unit which may be either self-propelled or drawn with a separate unit which will place the slurry tank and spray nozzles within sufficient proximity to the areas to be seeded so as to provide uniform distribution without waste. The Engineer may authorize equipment with smaller tank capacity provided that the equipment has the necessary agitation system and sufficient pump capacity to spray the slurry in a uniform coat. C. Mixing: Care shall be taken that the slurry preparation should be accomplished per the material supplier s recommendations and the equipment manufacturer s written operations manual. Spraying shall commence immediately when the slurry is mixed and the tank is full. The operator shall spray the area with a uniform, visible coat by using the green color of the wood pulp as a guide. Hydromulch Seeding Houston, Texas

84 D. Application: 1. Contractor shall obtain approval of hydromulch area preparation from the Engineer prior to application. 2. Operators of hydromulching equipment shall be thoroughly experienced in this type of application. Apply specified slurry mix in a motion to form a uniform mat at specified rate. 3. Keep hydromulch within areas designated and keep from contact with other plant material. 4. Slurry mixture which has not been applied within four (4) hours of mixing shall not be used and shall be removed from the site. 5. After application, the Contractor shall not operate any equipment over the covered area. 6. Immediately after application, thoroughly wash off any plant material, planting areas, or paved areas not intended to receive slurry mix. Keep all paved and planting areas clean during maintenance operations. 7. Refer also to the maintenance portion of this section. 8. All areas designed on drawings shall be covered uniformly with specified materials using hydromulching processes. If surfaces remain uncovered within the designated area, the Contractor shall seed with required grasses or ground cover materials those areas missed by the hydromulch application. Method used to seed these missed surfaces shall be an alternate seeding operation approved by the Architect/Engineer/Owner s Representative and shall be accomplished at no additional cost to the Owner. 3.2 CLEAN UP A. Keep all areas of work clean, neat, and orderly at all times. Keep all paved areas clean during installation operations. Clean up and removal all deleterious materials and debris from the entire work area prior to Final Acceptance to the satisfaction of Engineer. 3.3 INSPECTIONS A. Make written request for inspection prior to seeding and after areas have been seeded. B. Submit requests for inspections to Engineer at least two (2) days prior to the anticipated inspection date. 3.4 MAINTENANCE BY THE CONTRACTOR A. The Contractor's Maintenance Period shall begin upon inspection and approval at Substantial Completion and shall be for the period of 60 days. B. The Contractor's maintenance of new planting shall consist of watering, weeding, repair of all erosion and reseeding and re-sodding as necessary to establish a uniform stand of the specified Hydromulch Seeding Houston, Texas

85 grasses. Contractor shall guarantee growth and coverage of hydromulch planting under this Contract to the effect that a minimum of ninety five (95%) percent of the area planted will be covered with specified planting after sixty (60) days with no bare spots greater than ten (10) square feet. Any sod panels that are dead or dying shall be replaced. C. The Contractor shall be responsible for one (1) mowing in the event that the time between seeding or sodding and Final Acceptance exceeds thirty (30) days. D. Contractor shall make a second application of specified hydromulch planting to bare areas not meeting specified coverage as determined by the Engineer. Such replanting to be performed within sixty (60) days of initial application and immediately upon notification by Engineer to replant. E. Apply top dress fertilizer (16-6-8) at the rate of ten (10) pounds per 1,000 square feet at no less than nor more than twenty five (25) days after seeding unless approved in writing by the Owner. 3.5 FINAL ACCEPTANCE A. Work under this Section will be accepted by Engineer upon satisfactory completion of all work, but exclusive of re-application under the Guarantee Period. Final Acceptance of lawn establishment shall be as follows: B. For Seed: Ninety Five (95%) percent uniform coverage of grass in excess of one (1") inch height. No bare spots of greater than two (2) square feet will be accepted. C. The Engineer and/or Owner shall interpret the above. Upon Final Acceptance, the Owner will assume the responsibility for maintenance of the work. END OF SECTION Hydromulch Seeding Houston, Texas

86 SECTION TREE AND PLANT PROTECTION 1.0 GENERAL 1.1 Related Documents 1.2 Scope A. Planting and irrigation A. The work in this Section includes all material, labor, machinery and supervision required for tree and plant protection. 1.3 Project Conditions A. Preserve and protect existing trees and plants to remain from foliage, branch, trunk, or root damage that could result from construction operations. B. Any damage to preservation trees shall result in equivalent replacement to be paid by contractor. Prevent following types of damage: 1.4 Damage Assessment 2.0 MATERIALS 1. Compaction of root zone by foot or vehicular traffic, or material storage. 2. Trunk damage from equipment operations, material storage, or from nailing or bolting. 3. Trunk and branch damage caused by ropes or guy wires. 4. Root poisoning from spilled solvents, gasoline, paint, and other noxious materials. 5. Branch damage due to improper pruning or trimming. 6. Damage from lack of water due to failure to provide adequate watering. 7. Damage from alteration of soil ph factor caused by depositing lime, concrete, plaster, or other base materials near roots. 8. Cutting of roots larger than 1-1/2 inches in diameter. A. When trees other than those designated for removal are destroyed or badly damaged as a result of construction operations, remove and replace with same size, species, and variety up to and including 8 inches in trunk diameter. Tree larger than 8 inches in diameter shall be replaced with an 8-inch diameter tree of the same species. Tree and Plant Protection Houston, Texas Asakura Robinson Company

87 2.1 Products A. Asphalt paint: Emulsified asphalt or other adhesive, elastic, antiseptic coating formulated for horticultural use on cut or injured plant tissue, free from kerosene and coal creosote. 3.0 EXECUTION B. Burlap: Suitable for use as tree wrapping. C. Fertilizer: Liquid containing 20 percent nitrogen, 10 percent phosphorus, and 5 percent potash. D. All necessary tree replacements shall be as approved by Owner. 3.1 Protection and Maintenance of Existing Trees and Shrubs A. Except for trees and shrubs shown on drawings to be removed, all trees and shrubs within the project area are to remain and be protected from damage. B. For trees or shrubs to remain, perform the following: 1. Trimming of trees and shrubs to remain shall be done only under extreme care. a. Trees and shrubs requiring pruning for construction should also be pruned for balance as well as to maintain proper form and branching habit. b. Cut limbs at branch collar. No stubs should remain on trees. Branch cuts should not gouge outer layer of tree structure or trunk. 2. Use extreme care to prevent excessive damage to root systems. a. Roots in construction areas will be cut smoothly with a trencher before excavation begins. Do not allow ripping of roots with a backhoe or other equipment. b. Temporarily cover exposed roots with wet burlap or mulch to prevent roots from drying out. c. Cover exposed roots with soil as soon as possible. 3. Prevent damage or compaction of root zone (area below dripline) by construction activities. a. Do not allow scarring of trunks or limbs by equipment or other means. Tree and Plant Protection Houston, Texas Asakura Robinson Company

88 b. Do not store construction materials, vehicles, or excavated material under dripline of trees. c. Do not pour liquid materials under dripline. 4. Water and fertilize trees and shrubs that will remain to maintain their health during construction period. a. Supplemental watering of landscaping during construction should be done once every 7 days in cold months and once every 4 days in hotter months. b. This watering shall consist of saturating soils at least 6 to 8 inches beneath surface. 5. Water areas currently being served by private sprinkler systems while systems are temporarily taken out of service to maintain health of existing landscapes. 6. At option of the Contractor and with the City Engineer s permission, trees and shrubs to remain may be temporarily transplanted and returned to original positions under supervision of professional horticulturist. 3.2 Protection A. Protection of Trees or Shrubs in Open Area: 1. Install steel drive-in fence posts in protective circle, approximately 8-10 feet on center, not closer than 4 feet to trunk of trees or stems of shrubs. 2. Drive steel drive-in fence posts 3 feet minimum into ground, leaving 5 feet minimum above ground. 3. Wrap trunk with layer of burlap. 4. Install 2 x 4's or 2 x 5's (5-foot to 6-foot lengths) vertically, spaced 3 inches to 5 inches apart around circumference of tree trunk. 5. Tie in place with 12 to 9 gage steel wire. 6. Upon approval by Owners or landscape architect, other fencing material may be used. Such as 3 T-post at 8-10 on center with orange fiberglass fencing. 3.3 Maintenance of Newly Planted Trees A. Show proof of capacity to water during dry periods. B. The Contractor guarantees that trees planted for this Project shall remain alive and healthy at least until the end of a one-year warranty period and the additional one year period required by the Surface Restoration Bond. Tree and Plant Protection Houston, Texas Asakura Robinson Company

89 1. Within four weeks of notice from Owner, Contractor shall replace, at his expense, any dead trees or any trees that in the opinion of Owner, have become unhealthy or unsightly or have lost their natural shape as a result of additional growth, improper pruning or maintenance, or weather conditions. 2. When tree must be replaced, the guarantee period for that tree shall begin on date of replacement of tree, subject to the Owner or Landscape Architect s inspection, for no less than one year. 3. Straighten leaning trees and bear entire cost. 4. Dispose of trees rejected at any time by Owner at Contractor s expense. END OF SECTION Tree and Plant Protection Houston, Texas Asakura Robinson Company

90 SECTION GRAVEL 1.00 GENERAL 1.01 Related Documents 1.02 Scope A. Drawings and general provisions of contract, including general and supplementary conditions and all applicable specification sections, apply to this section. A. Provide labor, materials, equipment and appliances necessary to install and complete gravel bed in accordance with contract documents. B. Work shall include, but not necessarily be limited to, compaction of subgrade and installation of non woven geotextile fabric Related Work Sections A. Fine Grading: Section Quality Assurance A. The Contractor is responsible for correction of work which does not conform to the specified requirements, including colors and sizes. Correct deficient materials as directed by the owner MATERIALS A. Gravel type shall be Bullrock 3-5 diameter typical and shall be clean from all foreign materials. A. Geotextile fabric -shall be Contech C-60NW Nonwoven Geotextile or approved equal. Material shall be made of polypropylene, stable fiber, needle punched nonwoven, with permeability or water flow rate at 120 gallons minimum per square foot Submittals A. Contractor shall provide samples of gravel in small bags for approval. B. Filter fabric manufacturer s product data Product Handling A. Material shall only be delivered and stockpiled at job site at a location agreed upon with the landscape architect and owner when the site is ready for installation. Gravel Houston, Texas Asakura Robinson Company

91 2.03 Delivery and Storage A. Promptly notify the owner s representative in advance of the time of delivery of the gravel material EXECUTION 3.01 General A. Review the site and related drawings for ground areas to receive gravel work and obtain approval of the owner s representative before work is begun. B. In order to minimize conflict, locate all existing utilities and drainage pipes prior to beginning work Installation A. Inspect finished grades as it shall be level and true to line. Installation shall be properly coincide and align with adjacent work and elevations. All edges must be retained as per details B. Install geotextile fabric with all edges properly secured to the ground to prevent fabrics from flipping and exposing finish grade that causes erosion. C. Install gravel to specified depth. END OF SECTION Gravel Houston, Texas Asakura Robinson Company

92 SECTION IRRIGATION SYSTEM 1.0 GENERAL 1.1 SCOPE A. The work in this Section includes the installation of all materials specified herein and as shown on the contract drawings required to complete the irrigation system. All areas shown on plans are to receive irrigation. Work in this section shall include, but not be limited to: 1. Furnishing and installing a complete irrigation system. 2. Permit and fees as per City of Houston regulations. 3. Trenching and backfill. 3. Furnishing and installing backflow prevention devices. 4. Furnishing and installing sleeves where indicated. 5. Coordinate all activities with the installation of related electrical equipment and primary power wiring by electrical subcontractor. 6. Coordinating and installation of water meter and controller according to plans. 7. Boring under existing paving for irrigation piping and control valve wring if additional sleeves are required. 8. Inspections and tests. 9. Install extra control and ground wires if requested by Owners. 11. Clean up and disposal. 12. Coordinate connector of controller inside of building with other trades. 13. Record As Built drawings. 14. Warranties. 1.2 RELATED WORK 15. Disconnection of temporary irrigation zones. A. Costs for the following related items shall be part of the irrigation subcontract, unless otherwise specifically arranged for: Irrigation System Houston, Texas Asakura Robinson Company

93 1.3 RELATED SECTIONS 1. Contractor is required to notify Harris County authorities for work within city or county right-of-way. 2. Contractor is required to obtain all necessary permits and pay all fees prior to any construction. 3. Water meters installation. (if applicable) 4. Electrification of controllers, including meters and disconnects. A. Lawns and Grasses: Section B. Planting: Section C. Operation & Maintenance of Planting: Section COORDINATION OF WORK A. No portion of the irrigation system shall be installed until such time that all mechanical transplanting is complete. B. Contractor is to coordinate with other trades for construction sequence to avoid conflicts. 1.5 INSPECTION OF SITE A. The irrigation Contractor shall inspect the site and become familiar with the conditions. Where additional site prep is required prior to irrigation work under this Contract, Contractor shall coordinate his portion of the work with all other trades under this contract. The irrigation Contractor shall not mobilize his forces until the site is suitably prepared to facilitate the completion of all work in any given portion of the site. Beginning the work of this Section without reporting unsuitable conditions to the Landscape Architect constitutes acceptance of conditions by the Contractor. Any required removal, repair, or replacement of this work caused by unsuitable conditions shall be done at no additional cost to Owner. Contractor shall take necessary precautions to protect site conditions. Should damage be incurred, this Contractor shall repair damaged to its original condition, or furnish and install equal replacement at his expense. 1.6 REQUIREMENTS OF REGULATORY AGENCIES A. All work and materials shall be in full accordance with the latest rules and regulations of safety orders of Division of Industrial Safety, the Uniform Plumbing Code published by the Western Plumbing Officials' Association, and other applicable laws or regulations, including the Harris County Plumbing Code. Nothing in these drawings or specifications is to be construed to permit work not conforming to these codes. Should the Contract Documents be at variance with the aforementioned rules and regulations, notify Landscape Architect and get his instructions before proceeding with the work affected. Irrigation System Houston, Texas Asakura Robinson Company

94 B. Furnish and maintain all warning signs, shoring, barricades, red lanterns, etc., as required by the Safety Orders of the Division of Industrial Safety, and local ordinances. C. Procure required permits and pay required fees for water meter taps and backflow devices. D. Arrange inspections required by local agencies and ordinances during the course of construction, as required. 1.7 APPLICABLE STANDARDS A. Current published standards, specifications, tests or recommended methods of trade, industry, or governmental organizations apply to work of this Section where cited by abbreviations noted below: 1.8 SUBMITTALS 1. American Society of Testing and Materials (ASTM) A. At least ten (10) days prior to beginning work, submit five (4) copies of manufacturer's current catalog cuts, specifications, and operating instructions of the complete list of materials and assemblies to be installed. Quantities of materials and equipment need not be included. 1.9 SUBSTITUTIONS A. Specific reference to manufacturers' names and products specified in this Section are used as standards. This implies no right to substitute other material or methods, without written approval of the Landscape Architect. No substitutions should be used as a basis for bid unless otherwise allowed and authorized by bid addendum, prior to receipt of bids SCHEDULING A. Submit a proposed work schedule to Landscape Architect at least ten (10) days prior to start of work under this Section. After approval, no delays shall be authorized to this schedule without written authorization by Landscape Architect. B. The Contractor shall complete all irrigation and related electrical work and have complete irrigation system installed prior to the commencement of any planting. C. The Contractor may submit an alternate plan for release of partial areas where irrigation is complete and automated for commencement of planting operations PRODUCT HANDLING A. Protect work and materials under this Section from damage during construction and storage. Protect pipes and fittings from direct sunlight. Beds on which pipe is stored must be the full length of the pipe. Do not use any pipe or fitting which has been damaged or dented RECORD IRRIGATION DRAWINGS Irrigation System Houston, Texas Asakura Robinson Company

95 A. Contractor shall furnish Record Drawings of the complete irrigation system, in accordance with the General and Special Conditions. Procure from the Landscape Architect full-sized of Contract Drawings. Construction drawings shall be on the construction site at all times while the irrigation system is being installed. Contractor shall make a daily record of all work installed during each day. Actual location of valves and quick couplers and all irrigation piping shall be shown on the prints from easily identified permanent features, such as buildings, curbs, fences, walks or property lines. B. Drawings shall show approved revisions and substitutions, if any, of material, including manufacturer's name and catalog number. Contractor shall provide 3 hard copies of complete irrigation plans with color coded for clear reading or outline each irrigation zone. The drawings shall be made to scale and all indications shall be neat. All information noted on the print shall be transferred to the reproducible drawings by Contractor, and all indication shall be recorded in a neat, orderly way. The record shall be turned over to the Landscape Architect at or before the Final Acceptance of the project IRRIGATOR LICENSE A. All work in this contract shall be performed under the direct supervision of a Texas licensed irrigator REVIEWS AND TESTS A. The Contractor shall test lines under hydrostatic (line) pressure for a 12 hour period and repair any leaks as required by the Landscape Architect. B. Final review shall be made in conjunction with the final review of lawn, shrub and tree planting. C. The Contractor shall be responsible for making all repairs required to the irrigation system until the issuance of the Certificate of Substantial Completion. Upon the issuance of the Certificate, the Owner shall assume responsibility for the repair and maintenance of the irrigation system. D. All hydrostatic testing required in this section shall be at the Contractor's expense, and part of this contract. 2.0 MATERIALS 2.1 GENERAL 2.2 PIPE A. All materials and equipment to be installed shall be new and the best of their respective kinds. A. All pipe shall be continuously and permanently marked with the following information: Manufacturer's name or trademark, size, schedule and type of pipe, working pressure at 73 degrees F. and National Sanitation Foundation (N.S.F.) approval. Irrigation System Houston, Texas Asakura Robinson Company

96 B. Piping on pressure side of irrigation control valves: 1. Three inch (3") diameter and smaller, and all mains in sleeving Polyvinyl chloride (PVC) , and shall conform to ASTM #D inch (3") and larger: Polyvinyl chloride (PVC) SDR 21.0, Class 200 rubber-gasketed pipe, conforming to ASTM D-1784 and ASTM D Rubber gasket shall conform to ASTM D-1869 and shall be provided by the pipe manufacturer. C. Piping on non-pressure side of irrigation control valves: 1. Polyvinyl chloride (PVC) , SDR 21, Class 200, and conforming to ASTM D Except one-half inch (1/2") diameter pipe shall be Class 315, SDR 135. D. Backflow Devices 2.3 FITTINGS 1. Type K - Copper pipe A. Fittings for Rubber-Gasketed Pipe 1. Connections at 3" and 4" mains to 3" and 4" mains or laterals shall be Schedule 80, as provided by the same manufacturer as the pipe, and conforming to ASTM D-2466 and ASTM D Connections at 3" and 4" mains to 2 1/2" and smaller mains and laterals to remote-control and quick-coupling valves shall be Schedule 40 solvent-weld socket fittings conforming to ASTM B. Fittings for Solvent-Welded Pipe 1. Schedule 40, polyvinyl chloride, standard weight, as manufactured by "Sloane", "Lasco", or approved equal, to meet ASTM D and D Threaded PVC nipples shall be Schedule 80 PVC. 3. Solvent glue shall be "Christy's Red Hot Blue Glue" with compatible primer. C. Fittings for Polyethylene Pipe (Flex-Joints) 1. Polyalomer, as manufactured by "Flintkote" or approved equal. 2. Compression type of COVC, as manufactured by "Pepco" or equal. D. Fittings for Sprinkler Swing Joints Irrigation System Houston, Texas Asakura Robinson Company

97 1. Supply two (2) Schedule 40 "Marlex" street elbows and one (1) Schedule 40 thread-to-thread. 2. Threaded PVC Nipples shall be Schedule 80 PVC. 3. Lengths of nipples as shown on plans. E. Fittings for Quick Coupler Swing Joints (Schedule 40) 2.4 GATE VALVES 1. Supply three (3) galvanized thread-to-thread elbows 2. Two (2) three inch (3") galvanized nipples 3. One two inch (2") threaded galvanized nipple 4. One twelve inch (12") threaded galvanized nipple 5. Use "Permatex" pipe compound for all threaded fittings 6. Eighteen inch (18") #5 rebar 7. Two (2) stainless steel hose clamps A. Up to three inch (3"):125 lb. bronze construction, non-rising, as manufactured by "Grinnel", Red and White, or approved equal 2.5 SLEEVES FOR CONTROL WIRE AND WATER LINE A. All conduits and sleeves for irrigation mains and laterals shall be six inch (6") Schedule 40 PVC, common conduit. Use two inch (2") Schedule 40 PVC for remote control wiring. For controller power feed, use 3/4" galvanized steel, unless otherwise specified on the drawings or existing in the field. 2.6 CONTROL WIRE A. Wire 1. Solid copper wire, U.L. approved for direct burial in ground. 2. Minimum gauge: #14 U.F. 3. Common ground wire shall be white. B. Extra Wire 1. Supply a minimum of one (1) extra wire for each direction of run to last valve. 2. Extra wire shall be of a fugitive color, loop at each valve. C. Splicing Material Irrigation System Houston, Texas Asakura Robinson Company

98 2.7 VALVE BOXES 1. "Scotchlock Sealing Pack" or "Rainbird Snap-Tites" (use separate packs for each splice) or ring on step. A. Valve boxes shall be injection-molded of polyesters and fibrous inorganic, temperatureresistant components. Box shall provide adequate clearance to operate and service valve. Box and lid to be black, as manufactured by Carson Industries, Inc., LaVerne,California or approved equal. 1. Hose Connection Valve Boxes shall be rectangular, approximately ten inches by fourteen inches (10" x 14"), and shall be approximately fifteen inches (15") deep. Model # with hinged cover. Extensions for rectangular boxes shall be Carson #1419E-12 or Ametek. 2. Gate Valve and Electric Valve Boxes shall be round, approximately nine inches (9") inside diameter by ten inches (10") deep. Model # Extensions for round boxes shall be Carson #910E-12 or Ametek. 2.8 QUICK-COUPLING VALVES / HOSE END CONNECTIONS A. Valve and key shall be Rainbird #33D and #33DK. B. Hose connectors shall be NIBCO # or approved equal. C. Furnish two (2) valve keys fitted with three-quarter inch (3/4") swivel hose ells. 2.9 CONTROL WIRE SPLICE BOXES A. Shall be nine inches (9") in diameter by ten inches (10") deep. Carson # or Ametek SPRINKLER HEADS A. See plans legend for Manufacturer and Model. B. Spray nozzles (as indicated on plan) 1. MP Rotator: Adjustable arc, Adjustable Radius, Matched Precipitation Rate, Multi- Stream, Multi- Trajectory, Rotating Stream Sprinkler. 2. The sprinkler shall be of the viscous fluid brake rotary type and be a multi-stream rotating stream sprinkler. 3. In full or part circle mode the sprinkler shall be capable of covering a foot radius at psi pressure with an equivalent full circle discharge rate of gpm. Side strip sprinkler shall be capable of irrigating a rectangular area of 5 feet x 30 feet at gpm. Left and right strip sprinkler shall be capable of irrigating a rectangular area of 5 feet x 15 feet at 0.14 gpm. Irrigation System Houston, Texas Asakura Robinson Company

99 4. The sprinkler shall produce and maintain a matched precipitation rate -----greater than 0.6 per hour throughout the arc adjustment range and radius adjustment range, (up to 25% of radius reduction), when spaced at 50% of wetted diameter. 5. The part circle sprinkler shall have an infinitely adjustable arc from 45 to 105, 90 to 210 or between 210 to 270 depending on the model selected. The full circle sprinkler shall irrigate a full 360. The 45 to 105 model shall not require coverage from adjacent sprinklers closer than 3 from the head. 6. Full or part circle sprinklers shall be capable of up to 25% radius reduction using a stainless steel radius adjustment screw. The radius reduction screw shall have a slip clutch mechanism to prevent internal damage if turned past the minimum or maximum radius settings. The radius reduction screw shall reduce the pressure and flow upstream of the adjustment orifice thereby maintain stream integrity. 7. Part circle sprinklers shall have arc adjustment capabilities using a stainless steel ring. The adjustment ring shall be effective only while the sprinkler is popped up and shall be ineffective while the sprinkler is popped down. When turned past the minimum or maximum arc limits the adjustment mechanism shall have a slip clutch action to prevent internal damage. 8. This same slip clutch action shall allow the orientation of the fixed edge of the variable arc when installed on a fixed riser or in a popup body. This independent of and in addition to any ratchet that may exist in a popup body. 9. The sprinkler itself shall popup at approximately 15 psi of water pressure. Upon cessation of water pressure, the sprinkler itself shall retract. When installed in a popup body the sprinkler itself shall pop-up after the popup of the body stem has begun. Upon decreasing pressure the sprinkler itself shall pop-down before the popdown of the body stem is complete. 10. The sprinklers adjustable orifice shall be manufactured from poly-urethane and acetyl plastic materials for durability. 11. The sprinkler shall be fitted with a detachable filter. 12. Sprinkler Assembly models MP Corner, MP Side Strip, MP Left Strip, MP Right Strip, MP 1000, MP 2000, & MP 3000 shall be installed in popup bodies having a 5/8-27 UNS male threaded stem, at all common popup heights. Sprinkler Assembly shall also be able to attached to a ½ FIPT x 5/8-27 UNS male threaded adapter for use on fixed pipe risers. Models MP Corner T, MP Side Strip T, MP Left Strip T, MP Right Strip T, MP 1000T, MP 2000T, & MP 3000T shall be able to installed in popup spray head bodies having a 5/8-29 UNS female threaded stem, at all common popup heights. Sprinkler shall also be able to be attached to a ½ FIPT x 5/8-28 UNS female threaded adapter for use on fixed pipe risers. 13. The sprinkler shall be as manufactured by Hunter Industries Irrigation System Houston, Texas Asakura Robinson Company

100 2.11 DRIP SYSTEM 14. MP Rotator is available at Ewing Irrigation Golf Industrial, 4519 Techniplex Drive, Stafford, Tx 77478, Contact: Luis Andrade, Tel: A. Lateral line shall be Rainbird 1/2 inch XBS Black Strip polyethylene tubing. B. Dripline tubing shall be Rainbird 1/2 inch Landscape Dripline LD C. 3 /4 inch Control Zone Kit shall be Rainbird XCZ-075-RPF-BF which included LFV-075 Valve: Back Flush Pressure Regulating Filter, Duck Bill Boot REMOTE CONTROL VALVES A. Valves shall be of plastic construction, slow acting "Rainbird" PE Series or approved equal. Use PRS regulators where shown on plans REMOTE CONTROL TAGS A. "Christy Irrigation I.D. Tags", yellow, with thermofused numbers with letter prefixes to match controller letters 2.14 VALVE KEYS A. "Champion" #30, thirty inches (30") long, or approved equal. Furnish two (2) keys CONTROLLER(S) A. All controllers shall be positively grounded to a three-quarter inch (3/4") copper rod, driven a minimum of forty-two inches (42") into the ground. All units shall come equipped from the manufacturer with complete lighting and power surge protection. B. See plans legend for Manufacturer and Model CONCRETE FOR THRUST BLOCKS A. Portland Cement 1. Shall conform to current requirements of ASTM Designation C150, Type I or II cement. B. Coarse Aggregate 1. Coarse aggregate for regular-weight concrete shall be hard, durable, uncoated, washed, graded, cleaned and screened crushed rock or gravel, conforming to current requirements of ASTM Designation C33. C. Concrete shall be designated to surpass compressive strength of 3,000 PSI GRAVEL BACKFILL Irrigation System Houston, Texas Asakura Robinson Company

101 A. Gravel for backfilling quick-couplers, remote control valve boxes and rotor heads shall be three-eighths inch (3/8") diameter "pea gravel". 3.0 EXECUTION 3.1 LAYOUT A. No consideration shall be given to any design changes until after the awarding of the contract. Should any changes be deemed necessary after award of contract for proper installation and operation of the system, such changes shall be negotiated by the Landscape Architect, based upon the price schedule. B. Sprinkler heads shown on the drawings are diagrammatic. It shall be the Contractor's responsibility to establish the location of all sprinkler heads on all turf areas, in order to assure proper coverage of all areas. In no case shall spacing of sprinkler heads exceed distances shown on the drawings and/or those specified. Pipe sizes shall conform to those shown on the drawings. No substitutions of smaller pipe sizes will be permitted, but substitutions of larger sizes may be approved. All pipe damaged or rejected because of defects shall be removed from the site at the time of rejection. C. The Contractor will stake out the location of each run of pipe and all sprinkler heads for sprinkler valve locations, prior to trenching. Before installation is started in a given area, Landscape Architect shall check all locations and give his approval. 3.2 PREPARATION A. Generally, all piping under concrete and special paving shall be Schedule 40 PVC. Piping under concrete or asphalt shall be installed by boring. Where any cutting or breaking of sidewalks, concrete work and/or asphalt is necessary, it shall be removed and replaced by the Contractor as part of this contract, in accordance with the Owner and/or Landscape Architects' direction, at no cost to the Owner. Where piping on the drawings is shown under paved areas, but running parallel and adjacent to planted areas or turf areas, the intent of the drawings is to install the piping in the planted turf areas. B. Unless otherwise specified or indicated on the drawings, the construction of the sprinkler system shall include the furnishing, installing, and testing of all mains, laterals, risers and fittings, the furnishing and installing of sprinkler heads, control valves and all necessary specialties and accessories, the removal and/or restoration of existing improvements, excavation and backfill, and all other work in accordance with the plans and specifications, as required for a complete system. 3.3 EXCAVATING AND TRENCHING A. In areas where electrical conduit will be installed by the electrical contractor, coordinate all trenching activities with electrical subcontractor, so as to minimize duplication of work and/or damage to other's work. B. Perform all excavations as required, for installation of work included under this Section, including shoring of earth banks, if necessary. Restore all surfaces, existing underground Irrigation System Houston, Texas Asakura Robinson Company

102 installations, etc., damaged or cut as a result of the excavations, to their original conditions. C. The exact location of all existing utilities and structures and/or underground utilities, which may not be indicated on the drawings, shall be determined by the Contractor and indicated on the "as built" drawings as they are encountered. The Contractor shall conduct his work so as to prevent interruption of service or damage to them. D. The Contractor shall protect existing structures and utility services and be responsible for their replacement if damaged by him, or make necessary adjustments in their location, if required, in order to complete the work of this Contract. Minor adjustments in the system will be permitted to clear existing fixed obstructions, subject to the approval of the Owner's representative or the Landscape Architect. E. Installation of main and lateral lines by the vibratory flow method will not be allowed. F. Trenches for plastic pipe shall be excavated of sufficient depth (12" to top of pipe) and width to permit handling and installation of the pipe and fittings. The backfill shall be thoroughly compacted by water tamping or approved method, and evened off with the adjacent soil level. All trenches that are opened during any particular working day shall be closed and backfilled the same day. No open trenches or partially-backfilled trenches shall be left overnight, except as required for inspection. G. Trenches shall be of sufficient depth to provide minimum cover from finish grade, as follows: 3.4 BORING METHOD 1. Over pipe, on pressure side of irrigation control valve, control wires and quickcoupling valves: twenty inches (20") minimum. 2. Over pipe, on non-pressure side of irrigation control valve: twelve inches (12") typical. A. All borings shall be performed with a water-lubricated rotary machine. B. All bores shall be a minimum of eighteen inches (24") below any pavement, or at a depth required by governing code. C. For bores greater than two inches (2"), a maximum pilot diameter of two inches (2") shall be used, with reamers for larger bores at a maximum of two inch (2") increments. D. Sleeves shall be immediately installed, as part of the boring operation. E. Provide shoring, if required, to eliminate subsidence from under pavement structures. F. Report any irregularities and obstructions in the boring process to the Landscape Architect. Irrigation System Houston, Texas Asakura Robinson Company

103 3.5 WATER METERS A. Make required connections to water meter per the requirements of the local water authority codes. 3.6 BACKFLOW PREVENTION DEVICE A. Install pressure-type backflow preventer at required grade for plumbing code. All exposed main line and main line riser above PVC main elevation, shall be type "K" copper. Install one (1) brass union in riser downstream, or device. Wrap all controllers with foam-type insulators. 3.7 LINE INSTALLATION A. All pipe, fittings, and valves, etc. shall be carefully placed in the trenches. Interiors of pipe shall be kept free from dirt and debris. When pipe laying is not in progress, open ends of pipe shall be closed by approved means. B. All lateral connections to the mainline, as well as all other connections shall be made to the side of the mainline pipe. No connections to the tip of the line shall be allowed. Pipes shall be bedded in at least two inches (2") of finely divided material with no rocks or clods over one inch (1") diameter, to provide a uniform bearing. In common trenches, do not allow pipe to overlap. C. Plastic pipe shall be installed in a manner so as to provide for expansion and contraction, as recommended by the manufacturer. D. Plastic pipe shall be cut with PVC pipe cutters or hacksaw, or in a manner as to ensure a square cut. Burrs at cut ends shall be removed prior to installation, so that a smooth, unobstructed flow will be obtained. E. All plastic-to-plastic joints, except polyethylene, shall be solvent-weld joints or slip-seal joints. F. Shall be made with plastic male adaptors. 3.9 SOLVENT-WELD JOINTS FOR PLASTIC PIPES A. Thoroughly clean the mating pipe and fitting with a clean, dry cloth. B. Apply a uniform coat of primer to the outside of the pipe and the fitting. C. Apply a uniform coat of solvent to the outside of the pipe first, and then inside the fitting. Apply a second coat of solvent to the outside of the pipe, and quickly insert it into the fitting. D. Give the pipe or fitting a quarter turn to ensure even distribution of the solvent, and make sure the pipe is inserted to the full depth of fitting socket. E. Hold in position for fifteen (15) seconds. Irrigation System Houston, Texas Asakura Robinson Company

104 F. Wipe off excess solvent that appears at the outer shoulder of the fitting. Care should be taken so as not to use an excess amount of solvent, causing an obstruction to form on the inside of the pipe. The joints shall be allowed to set at least twelve (12) hours before G. Use "Permatex" pipe compound on the threaded PVC fittings, except where Marlex fittings are used. H. Use strap-type friction wrench only. Do not use metal-jawed wrench. I. When connection is plastic-to-metal, male adaptors shall be used. The male adaptor shall be hand tightened, plus one turn with a strap wrench. Joint compound shall be Teflon tape or equal, upon approval. 3.1 CONCRETE THRUST BLOCKS A. Install where the rubber-gasketed irrigation main changes direction, as at ells and tees, and where the rubber-gasketed main terminates. B. Pressure tests shall not be made for a period of thirty-six to forty-eight (36-48) hours following the completion of pouring the blocks. C. Blocks for these mains shall be sized and placed in strict accordance with the pipe manufacturer's specifications. Blocks shall be placed to take all thrust created by the maximum internal water pressure. 3.2 REMOTE CONTROL VALVES A. Unless otherwise specified, the installation of all valves shall include the excavation and backfill, the furnishing, installing and testing of risers, fittings and valves, and the removal and/or restoration of existing improvements, and all other work, in accordance with the plans and specifications, and as required for the completed installation. B. Valve installation shall include setting of the specified valve box to proposed grade. All valves shall be teed off the main, to facilitate setting at six inches (6") below grade, measured at the top of the handle. C. Install control valves in valve boxes where shown, and group together, where practical. Place no closer than eighteen inches (18") to walk edges, buildings and walls. Valve boxes shall be flush with finished grade. Set all remote control boxes in centerline of median for all esplanade applications. D. Set valves in bead of four inches (4") of pea gravel, and fill to half of valve body. 3.3 SPRINKLER INSTALLATION A. All sprinkler heads and quick-coupling valves shall be set perpendicular to finished grade, unless otherwise designated on the drawings, or otherwise specified. Sprinkler heads adjacent to existing walls, curbs and other paved areas shall be set to grade no closer than eighteen inches (18") from such walls. Sprinkler heads which are to be installed in lawn Irrigation System Houston, Texas Asakura Robinson Company

105 areas where the turf is not yet established shall be set one-half inch (1/2") above the proposed finish grade. B. Heads installed in this manner will be lowered to grade when the turf is sufficiently established to allow walking on it without appreciable destruction. Such lowering of heads shall be done by the Contractor as part of the original contract, with no additional cost to Owner. All sprinklers having an adjusting screw shall be adjusted on a lateral line or circuit, as required, for the proper arc of coverage, radius, diameter and/or gallonage discharge. C. Backfill all rotor heads having drain holes in body with a minimum of one-half cubic foot (1/2 c.f.) of pea gravel. D. After all new sprinkler piping and risers are in place and connected, and all necessary division work has been completed, and prior to the installation of sprinkler heads, all control valves shall be opened and a full head of water used to flush out the system. The same procedures shall apply to the polyethylene tubing. Testing of the system shall be performed after completion of each section. 3.4 AUTOMATIC CONTROLLER A. Install specified units in specified enclosures. B. Install per local code and manufacturer's latest printed instructions. C. Connect remote control valves to controller in clockwise sequence to correspond with station setting, beginning with Stations 1, 2, 3, etc. D. All controllers shall be fully grounded and have full manufacturer-approved lightening protection. E. Contractor shall contract with licensed electrician to supply electricity for the required controllers. 3.5 QUICK COUPLERS A. Pre-assemble quick coupler swing joint, using brass nipples and fittings as shown on details. Use Teflon tape for all threaded joints. B. Discard nipples and fittings with damaged threads. C. Test swing joint and quick coupler by pressuring to specified main line pressure. All joints should withstand pressure, while still being flexible. D. Glue pre-assembled quick coupler and swing joint to main line and stack quick coupler, as shown. E. Stake quick coupler assembly with specified rebar and two (2) hose clamps. Irrigation System Houston, Texas Asakura Robinson Company

106 F. Install specified nine inch (9") round box and pea gravel. Top of quick coupler shall be four inch (4") below top of box. Fill box with pea gravel to six inches (6") below top of box. 3.7 SPRINKLER SWING JOINTS A. Install swing joints, as shown on drawings. B. All joints shall be hand-tightened to eliminate leakage, but loose enough to remain flexible. C. All pipe and fittings shall be oriented on either a horizontal or vertical access. D. When complete, the heads should be fully adjustable. E. Where possible, make all connections to the bottom of the sprinkler body. Avoid side connections, except for planter box applications. F. All head height adjustment shall be made through the swing joint. When adjusted to grade, sufficient adjustment shall remain to facilitate raising or lowering at a later date. 3.8 CONTROL WIRES A. Install control wires with sprinkler mains and laterals in common trenches, wherever possible. Lay to the side of pipe lines. Snake wires in trench, to allow for contraction of wires. Tie wires in bundles at ten foots (10') intervals with 3/4" black electrician tape. B. Control wire splices at remote control valves to be crimped and sealed with specified splicing materials. Line splices will be allowed only on runs of more than five hundred feet (500'). Splice each connection in a separate "Scotchlock Sealing Pack". Place all splices in nine inches (9") diameter boxes. C. Coil control wires and extra wires at each R.V.C. connection. Coil by neatly wrapping wire around a section of pipe, ten (10) wraps before splicing. Similarly coil all control wires at each end of all sleeves and where wire changes direction. D. Install a minimum of one (1) extra control wire to the control valve located the greatest distance from the controller in each direction, and label each blank end. E. Pilot Wires to be red or black and white to be for all common ground wires. 3.9 GATE VALVES A. Install isolation and branch gate valves directly on main. B. Where gate valves isolates branch mains of a smaller size, size valve to largest main and add reducing fittings down stream of valves. Irrigation System Houston, Texas Asakura Robinson Company

107 C. Place gate valve on minimum of four inches (4") of pea gravel. Place to cover pipe, while leaving handle fully exposed. D. Install specified "Carson" box and "Carson" extension over valve. Box and extensions should extend from finished grade to top of pipe. 3.0 CONDUITS AND SLEEVES A. Furnish and install conduit where control wires pass under or through curbs. B. Conduits to be of adequate size to accommodate retrieval for repair of wiring and shall extend twenty-four inches (24") beyond edge of walls. Minimum size shall be four inches (4"). C. Install sleeves for all pipes passing through or under walls, walks, and paving. Sleeving to be of adequate size to accommodate retrieval for repair and wiring, or piping, and shall extend twelve inches (12") beyond edge of paving or other construction, where possible. Minimum size shall be six inches (6"). 3.1 TESTING A. Test piping on the non-pressure side of control valves after system is operational, by observing for leaks in pipe trenches. B. Leaks resulting from tests shall be repaired, and tests repeated until system passes tests. C. Completely install meter, mains, control valves and isolation valves. D. Fill all lines with water and shut off at backflow. E. Open all isolation valves. F. Pressurize main to approximately 125 PSI. Monitor gauge for pressure for four (4) hours, with a maximum allowable loss of one (1) PSI per hour. Pressurize at quick coupler, or fabricate a fitting for this purpose. G. Repair any leaks or sources of pressure loss. H. Test all isolation valves for leakage. I. Perform above test prior to operation of laterals. J. Laterals to be visually inspected for leaks during operation. 3.2 BACKFILL AND COMPACTING A. After system is operating and required tests and inspections have been made, backfill excavations and trenches with clean soil, free of debris. Irrigation System Houston, Texas Asakura Robinson Company

108 B. Backfill for all trenches, regardless of the type of pipe covered, shall be compacted to minimum 95% density under pavements, 85% under planted areas. C. Compact trenches in areas to be planted, by thoroughly flooding the backfill. Jetting process may be used on those areas. D. Dress off all areas to finish grades. 3.3 CLEAN UP A. Keep all areas of work clean, neat and orderly at all times. Keep paved areas clean during installation. Clean up and remove all debris from the entire work area to satisfaction of Landscape Architect prior to Final Acceptance. 3.4 EXTRA MATERIALS A. The Contractor shall provide the following extra parts as part of this contract, prior to Final Acceptance. 3.5 WARRANTY ITEM QUANTITY Quick Couplers 2 Gate Valve Box 2 Quick Coupler Box Covers 2 R.C.V. Box 2 Sprinkler Heads 2 of each type used Quick Coupler Keys 2 Thompson Keys 2 Valve Cover Keys 2 of each type used A. In addition to manufacturer's guarantees or warranties, all work shall be warranted for one (1) year from the date of Substantial Completion against defects in material, equipment and workmanship by the Contractor. Warranty shall also cover repair of damage to any part of the premises resulting from leaks or other defects in materials, equipment, and workmanship, to the satisfaction of the Owner. This shall not be interpreted to include damage caused by vandalism, accident or the result of activities by other parties. B. The irrigation Contractor shall submit a letter of warranty, through the prime Contractor, containing the following paragraph: "We hereby guarantee that the sprinkler irrigation system that we have furnished and installed is free from defects in materials and workmanship. The work has been completed in accordance with the drawings and specifications, ordinary wear and tear and/or unusual abuse or neglect, excepted. We agree to repair or replace any defects in material or workmanship which may develop during the period of one year from the date of acceptance, and also to repair or replace any damage resulting from the repairing or replacing of such defects at no additional cost to the Owner. We shall make such repairs or replacements within a reasonable time, as determined by the Owner, after receipt of replacements within a reasonable time, after receipt of written notice by Certified Mail from the Owner, we Irrigation System Houston, Texas Asakura Robinson Company

109 authorize the Owner to proceed to have said repairs or replacements made at our expense and we will pay the costs and charges therefore upon demand." 3.5 DISCONNECTION OF TEMPORARY IRRIGATION ZONES B. One year after date of substantial completion, all zones of irrigation (except those labeled on plan as permanent irrigation) shall be disconnected. See irrigation plans for limits of permanent irrigation. To complete disconnection, irrigation controller shall be set to eliminate irrigation in temporary zones. Permanent irrigation zones shall continue to receive irrigation as regularly scheduled. See manufacturer s literature for programming instructions. END OF SECTION Irrigation System Houston, Texas Asakura Robinson Company

110 SECTION SOIL PREPARATION 1.0 GENERAL 1.1 Work included in this Section shall include, but not be limited to, the following: A. Project Layout B. Preparation of existing rough grade for deposition of fine grading materials and turf C. Cleanup and removal of debris and material, labor, tools, machinery and processes necessary to complete the above. 1.2 All work under this Contract not specifically designated on the drawings shall be field directed by the Owner or their Agent. 1.3 The use of any area for the purposes of equipment access, storage and employee parking shall be subject to the approval of the Owner or their Agent and in accordance with Division I. Prior to the start of any work, the Contractor shall submit a site plan clearly showing all access points, storage areas, employee parking areas and temporary facilities for approval by the Owner or their Agent. 1.4 Work Included A. Clearing and grubbing required for this Work includes, but is not necessarily limited to: 2.0 MATERIALS 1. Felling of trees including removal of stumps, roots, and other debris. 2. Removing shrubs, grass, weeds, and other understory vegetation. 3. Removing improvements or obstructions that interfere with new construction. 4. Construction of temporary barriers around trees and/or tree save areas designated to remain. 5. Removal of all debris. 6. Siltation fence maintenance and installation. 2.1 The Contractor shall submit an outline of methods, materials and machinery to be employed to complete work in this Section for approval. 2.2 Herbicide A. Round Up or approved equal. 2.3 Barricades Soil Preparation Houston, Texas Asakura Robinson Company

111 A. 48" orange snow fencing or equal. B. 5' metal "T" posts 2.4 Siltation Fencing A. 18" Mirafi 400 or equal. 3.0 EXECUTION 3.1 All work shall be performed under the direct supervision of the Contractor's designated superintendent. The above shall apply to all work, whether performed by the Contractor's own forces or sub-contractors. 3.2 Site Inspection A. The drawings do not purport to show all objects existing on the site. B. Before commencing the work of this Section, verify with the Owner or their Agent all objects to be removed and all objects to be preserved. C. Locate all existing utility lines and determine all requirements for disconnecting, abandonment, and capping. Assistance in the location of all existing utilities can be obtained from the Utility Coordinating Committee for The city of Galveston. D. Locate all existing active utility lines traversing or adjacent to the site, and determine the requirements for their protection. E. Attention is called to Division I requirements for protection of existing utilities and for reporting utilities not shown in plan. 3.3 Removal of Debris A. Remove all debris from the site and leave the site in a neat and orderly condition to the Approval of the Owner or their Agent. B. All debris, the product of demolition, clearing, etc. unless otherwise designated, shall be removed from the site and legally disposed of. Such debris will not be allowed to accumulate so as not to constitute a hazard to the public. C. Debris shall include all barricades or fencing and silt fencing upon completion of their intended use. 3.4 Preparation of Areas to Receive Fill Material A. Treat all existing vegetative areas with Round Up and allow 7-10 days for effect. B. Remove all dead vegetation. C. Scarify top 4" of existing soil. Soil Preparation Houston, Texas Asakura Robinson Company

112 D. Apply till material. 3.5 Tree Barricade Fencing A. Install 48" orange snow fencing continuously around all forested areas which are to remain undisturbed within the site as well as those isolated individual trees to remain. B. Repair as necessary during the course of the work to keep areas free of intrusion by machinery, materials, equipment and workmen. 3.6 Siltation Fencing A. Install specified fencing at all curbs, property lines and edges of undisturbed forested areas to enclose the perimeter adjacent to all disturbed areas. B. Fence shall be installed so as to prevent the migration of silt onto streets and adjacent properties and undisturbed forested areas. 3.7 Clearing and Grubbing A. Felling of Trees B. Grubbing 3.8 Stripping Topsoil 1. Protect roots and branches of trees designated to remain. 2. Remove only trees and shrubs within clearing areas designated on the drawings unless otherwise indicated or directed. 3. Completely remove stumps, root and other debris protruding through ground surface to a minimum depth of 12 inches. 4. Carefully and cleanly cut roots and branches of trees indicated to be left standing, where such roots and branches obstruct new construction. 1. Remove all surface rocks, stumps, roots and other vegetation within limits of construction to a minimum depth of 6". 2. Do not leave any roots greater than 3 inches in diameter in the ground. A. Strip to whatever depths encountered in such a manner to prevent intermingling with underlying subsoil or other objectionable material. B. Remove heavy growths of vegetation from areas before stripping. C. Where trees are indicated to be left standing, stop topsoil stripping a sufficient distance from trees to prevent damage to main root system. D. Stock pile topsoil where directed. Soil Preparation Houston, Texas Asakura Robinson Company

113 E. Construction storage piles to freely drain surface water. F. Cover storage piles if required to prevent windblown dust. END OF SECTION Soil Preparation Houston, Texas Asakura Robinson Company

114 SECTION PLANTING MEDIA 1.0 GENERAL 1.1 Work Included A. Provide materials, testing, equipment and labor required to prepare amended plant mediums for: 1.2 Related Section 1. Planting Backfill Mix 2. Tree Planting Pit Backfill Mix 3. Shrub Bed Planting Backfill Mix A. Planting: Section Quality Assurance A. All soil components shall be tested by local or state testing laboratory for conformity to the specifications: 1. Contractor to submit proposed laboratory name, address, and telephone numbers. B. For delivered material, test one grab sample for each 100 c.y. of bulk material delivered to the site. C. Excavated material from tree pits and shrub beds shall not be used for preparation of backfill mix. 1.4 Inspections A. Testing will be at the expense of the Owner 1.5 Product Delivery, Storage and Handling A. Deliver material to site when permitted by the Owner and only when project is ready for related work. 2.0 MATERIALS 2.1 On Site Materials A. Specified backfill mixes shall consist of like material to that used for landscape grading. Planting Media Houston, Texas Asakura Robinson Company

115 2.2 Soil Amendments A. Wood Residuals 1. Source a. Shall be naturally composted stockpiled, and not have been chemically treated. 2. Physical Properties a. Grading: U.S. Sieve Dry Weight Percent Passing 3/ /4" No No b. Organic Content by Ash Analysis: % Dry Weight c. Chemistry 1. Saturation Extract Conductivity (EDc): Nil-3.5 B. Sand d. Salinity 1. Physical Properties a. Grading: 2. Reaction (ph): Maximum saturation extract conductivity 1.0 millimhos per cm at 25 degrees centigrade. U.S. Sieve Percent Passing No No Planting Media Houston, Texas Asakura Robinson Company

116 No No No No No b. Chemistry: Saturation Extract Conductivity (EDC): Sodium Absorption Ratio (SAR): Boron-ppm in saturation extract sltn.: Nil-3.0 Nil-6.0 Nil-1.0 Reaction (ph): Available calcium-sodium acetate extractable-ppm dry weight: Nil Planting Mix c. Iron Sulfate (Ferric or Ferrous) 1. Shall contain 30 to 35% iron, 35-40% sulphur and be supplied by a commercial fertilizer supplier. d. Treble Superphosphate 1. Commercial product containing 19 to 20% available phosphoric acid. e. Urea Formaldehyde 1. Commercial product containing 38% Nitrogen f. Soil Sulphur 1. Agricultural grade sulphur containing a minimum of 96% sulphur. g. Ammonium Sulfate 1. Commercial product containing approximately 21% ammonia. Planting Media Houston, Texas Asakura Robinson Company

117 A. Shall be thoroughly mixed in the following proportions: 1. Tree Planting, Shrub Bed, and Planter Backfill mixes: a. Contain sandy loam topsoil b. Double ground aged rice hull compost c. #1 bank sand d. Growers grade pine bark e. Forest floor mulch (Black Humus) f. All material are screened to provide 99% 1 minus sizing then blended to provide a uniform mixture. A minimum of 40% composted organic are utilized to add natural nutrients, provide aeration and optimum moisture retention capacities. B. Actual mixes and additive may vary depending on samples extracted from actual plant sources. C. Prepared backfill mixes shall come from the following source, unless otherwise specifically approved: 3.0 EXECUTION 3.1 Mixing 1. Living Earth Technology, Houston, TX (713) A. Mix soil base, amendments and chemical additives by mechanical means. Do not mix additives with excavated material at the plant pit site. B. Thoroughly mix all amendments with soil by mechanical means. C. Soil and sand bases shall be completely pulverized and free of lumps or aggregated material. Moisture content of base materials shall not be such that chemical, granular or pelletized additives become dissolved during the mixing process. D. Mix media in quantities of not less than 50 cubic yards or mix total quantity required, if less than 100 cubic yards. The Contractor shall be responsible for continuity between batches. E. For soil media mixes, do not incorporate soil from mixing area with mix. END OF SECTION Planting Media Houston, Texas Asakura Robinson Company

118 SECTION MULCHES, CHEMICALS AND NUTRIENTS 1.0 GENERAL 1.1 Work Included A. Provide materials, testing, equipment and labor required to prepare amended plant mediums for: 1.2 Related Section 1. Planting Backfill Mix 2. Tree Planting Pit Backfill Mix 3. Shrub Bed Planting Backfill Mix A. Planting: Section Testing will be at the expense of the Owner. 1.4 Excavated material from tree pits and shrub beds shall not be used for preparation of backfill mix. 1.5 Quality Assurance A. All soil components shall be tested by local or state testing laboratory for conformity to the specifications: 1. Contractor to submit proposed laboratory name, address, and telephone numbers. B. For delivered material, test one grab sample for each 100 c.y. of bulk material delivered to the site. 1.6 Product Delivery, Storage and Handling A. Deliver material to site when permitted by the Owner and only when project is ready for related work. 2.0 MATERIALS 2.1 On Site Materials A. Specified backfill mixes shall consist of like material to that used for landscape grading. 2.2 Soil Amendments A. Wood Residuals Mulches, Chemicals, and Nutrients Houston, Texas Asakura Robinson Company

119 1. Source A. Shall be naturally composted stockpiled, and not have been chemically treated. 2. Physical Properties A. Grading: U.S. Sieve Dry Weight Percent Passing 3/ /4" No No Organic Content by Ash Analysis: % Dry Weight 4. Chemistry A. Saturation Extract Conductivity (EDc): Nil-3.5 B. Sand 5. Salinity B. Reaction (ph): A. Maximum saturation extract conductivity 1.0 millimhos per cm at 25 degrees centigrade. 1. Physical Properties A. Grading: U.S. Sieve Percent Passing No No No No No No Mulches, Chemicals, and Nutrients Houston, Texas Asakura Robinson Company

120 2. Chemistry No A. Saturation Extract Conductivity (EDC): B. Sodium Absorption Ratio (SAR): C. Boron-ppm in saturation extract sltn.: Nil-3.0 Nil-6.0 Nil-1.0 D. Reaction (ph): E. Available calcium-sodium acetate extractable-ppm dry weight: Nil-2000 C. Iron Sulfate (Ferric or Ferrous) 1. Shall contain 30 to 35% iron, 35-40% sulphur and be supplied by a commercial fertilizer supplier. D. Treble Superphosphate 1. Commercial product containing 19 to 20% available phosphoric acid. E. Urea Formaldehyde 1. Commercial product containing 38% Nitrogen. F. Soil Sulphur 1. Agricultural grade sulphur containing a minimum of 96% sulphur. G. Ammonium Sulfate 2.3 Planting Mix 1. Commercial product containing approximately 21% ammonia. A. Shall be thoroughly mixed in the following proportions: 1. Tree Planting, Shrub Bed, and Planter Backfill mixes A. Contain sandy loam topsoil B. Double ground aged rice hull compost C. #1 bank sand Mulches, Chemicals, and Nutrients Houston, Texas Asakura Robinson Company

121 D. Growers grade pine bark E. Forest floor mulch (Black Humus) F. All material are screened to provide 99% 1 minus sizing then blended to provide a uniform mixture. A minimum of 40% composted organic are utilized to add natural nutrients, provide aeration and optimum moisture retention capacities. B. Actual mixes and additive may vary depending on samples extracted from actual plant sources. C. Palm tree, shrub and groundcover backfill/planting bed mix: Ultra Soil or approved equal as supplied by San Jacinto Environmental Supplies, 2221 W 34th St., Houston, Texas 77018, ph: Planting depth using this material shall six inches (6 ). D. Palm tree fertilizer: Mycor Palm Saver or approved equal as supplied by Houston Palm Tree Inc., Gulf Freeway, League City, Texas, ph: (for reference only) E. Fertilizer: Shrub, groundcover and seasonal color fertilizer shall be Microlife Ultimate (8-4-6) or approved equal as supplied by San Jacinto Environmental Supplies, 2221 W 34th St., Houston, Texas 77018, F. Root stimulator for palm trees, shrubs and groundcover shall be Super Seaweed or approved equal as supplied by San Jacinto Environmental Supplies, 2221 W 34th St., Houston, Texas 77018, ph: EXECUTION 3.1 Mixing A. Mix soil base, amendments and chemical additives by mechanical means. Do not mix additives with excavated material at the plant pit site. B. Thoroughly mix all amendments with soil by mechanical means. C. Soil and sand bases shall be completely pulverized and free of lumps or aggregated material. Moisture content of base materials shall not be such that chemical, granular or pelletized additives become dissolved during the mixing process. D. Mix media in quantities of not less than 50 cubic yards or mix total quantity required, if less than 100 cubic yards. The Contractor shall be responsible for continuity between batches. E. For soil media mixes, do not incorporate soil from mixing area with mix unless specified otherwise. END OF SECTION Mulches, Chemicals, and Nutrients Houston, Texas Asakura Robinson Company

122 SECTION LAWNS AND GRASSES 1.0 GENERAL 1.1 Work covered in this section shall include all materials, labor, equipment and supervision required for the installation of turf grass where and as described on the Drawings and in the Specifications. This work includes, but is not limited to the following: A. Installation of turf by the hydroseed method. B. Establishment of turf by sodding. C. Site clean up. D. Maintenance and guarantee. 1.2 Related Sections A. Fine Grading: Section B. Planting: Section Quality Assurance A. Sod: Shall be subject to inspection and approval by Owner s representative at the site upon delivery for conformity to Specifications. Such approval shall not impair the right of inspection and rejection during progress of the work. Owner s representative reserve the right to refuse inspection at this time is in his judgment, a sufficient quantity of sod is not available for inspection. B. Seed: The Owner s representative shall be furnished a signed copy of statement from vendor, certifying that each container or bag of seed delivered is labeled in accordance with the Federal Seed Act and is at least equal to requirement previously specified. Seed analysis shall be furnished prior to commencement of planting operations. Each lot of seed may be resampled and retested in accordance with latest Rules and Regulations under the Federal Seed Act at the discretion of the Owner s representative. If these tests reveal the seed to be below the specified pure live seed content, the Contractor shall be required to plant additional seed to compensate for the deficiency at no cost too the Owner. C. The Owner reserves the right to take or request samples of materials for conformity to specifications at any time. Contractor shall furnish samples upon request. Rejected materials shall be immediately removed from the site at Contractor's expense. Cost of replacement of materials not meeting specifications shall be paid by Contractor. 1.4 Inspections A. Make written request for inspection after seeding of sodding operation have been completed. Such inspection is for the purpose of establishing maintenance period. Lawns and Grasses Houston, Texas Asakura Robinson Company

123 B. Submit written requests for inspection to the Owner s representative at least 7 days prior to anticipate inspection date. 2.0 SUBMITTAL A. Furnish required copies of manufacturers literature, certifications, or laboratory analytical data for the following items: 1. Sod and seed source (certification) 2. Fiber mulch (laboratory analytical data) 3. Tank mix fertilizer (certification or laboratory analytical data) 4. Topdress fertilizer (certification) B. Submittal by Contractor of paperwork documenting source of products used is required for adherence to LEED requirements as listed in checklist MATERIALS 3.1 Seed A. All seed used shall be labeled in accordance with U.S. Department of Agriculture Rules and Regulations under the Federal Seed Act in effect on the date of Invitation for Bids. All seed shall be furnished in sealed standard containers, unless exception is granted in writing by the Owner s representative. Seed which has become wet, moldy, or otherwise damaged in transit or in storage will not be acceptable. B. The minimum percentage by weight of pure live seed in each lot of seed shall be as follows and seed shall be planted at the rate per acre indicated under pure live seed required per acre Pounds Pure Live Seed Minimum % Pure Live Required Kind of Seed Seed Required Per Acre (Summer Mix) Common Bermuda Grass (Hulled) Apply between September-November and/or March-May (Winter Mix) Common Bermuda Grass (Un-Hulled) Winter Rye Apply between October-December only. Note: % Pure Live Seed = % Purity X % Germination = Weed seed shall not exceed ten percent (10%) by weight of the total of pure live seed and other material in the mixture. Johnson grass, nut grass, or other noxious weak seed will not be allowed. Lawns and Grasses Houston, Texas Asakura Robinson Company

124 3.3 Fertilizer for Tank Mix A. The additives shall be delivered to the site in bags or other convenient containers, each fully labeled, conforming to the applicable state fertilizer laws, and bearing the name or trademark and warranty of the producer. Fertilizer to conform to following for 1,000 S.F. 20 lbs. ( ) NPK for Turf 3.4 Wood Cellulose Fiber Mulch 3.5 Water A. Wood cellulose fiber mulch, for use with the hydraulic application of grass seed and fertilizer, shall consist of specially prepared wood cellulose fiber. It shall be processed in such a manner that it will not contain germination or growth-inhibiting factors. It shall be dyed an appropriate color to allow visual metering of its application. The wood cellulose fibers shall have the property of becoming evenly dispersed and suspended when agitated in water. When sprayed uniformly on the surface of the soil, the fibers shall form a blotter-like groundcover which readily absorbs water and allows infiltration to the underlying soil. Weight specifications from suppliers for all applications shall refer only to air dry weight of the fiber, a standard equivalent to 18% moisture. The mulch material shall be supplied in packages having a gross weight not in excess of 100 lbs. and be marked by the manufacturer to show the dry weight content. Suppliers shall be prepared to certify that laboratory and field testing of their product has been accomplished and that it meets all of the foregoing requirements. Shall be free from oil, acid, alkali, salt, and other substances harmful to growth of grass. The water source shall be subject to approval prior to use. 3.6 Slurry Mix Components Per Acre Wood Cellulose Fiber Mulch ,000 pounds Grass Seed (as specified) Fertilizer ( ) pound 3.7 Top Dress and Lawn Fertilizer for Existing Lawn (Delayed Application) 3.8 Sod Complete fertilizer, fifty percent (50%) of the nitrogen to be derived from natural organic sources or urea-form. Available phosphoric acid shall be from superphosphate, bone, or tankage. Potash shall be derived from muriate of potash containing sixty percent (60%) potash with elemental 20% iron sulfate equivalent to 400 lbs/acre: 16% Nitrogen 6% Phosphoric Acid 8% Potash A. Sod shall be one (1) year old St. Augustine grass. Sod shall be dense with grass having been mowed at one and one inch (1") height before lifting from field. All sod delivered to the Lawns and Grasses Houston, Texas Asakura Robinson Company

125 site for the duration of the project shall be uniformly cut by the same sod cutter or multiple machines adjusted to cut the same thickness of sod root/soil mass. B. Sod shall be in vigorous condition, dark green in color, free of disease and harmful insects and grown on fumigated soil. C. Do not stack for more than 24 hours between time of cutting and time of delivery. D. The Landscape Architect reserves the right to reject any sod deemed unacceptable for installation. 4.0 EXECUTION 4.1 Hydromulch Seeding on Prepared Finished Grade A. Bed Preparation: Spread topsoil to a 3 minimum depth required and feather smoothly into finished grade at edge so as to blend with adjacent ground shapes. Immediately after finished grade has been approved, begin hydroseeding operation to reduce excessive weed growth. B. The Contractor shall apply seed, fertilizer and mulch by spraying them on the previously prepared seedbed in the form of an aqueous mixture and by using the methods and equipment described herein. The rates of application shall be as specified above. C. Spraying Equipment: The spraying equipment shall have a container or water tank equipped with a liquid level gauge calibrated to read in increments not larger than 50 gallons over the entire range of the tank capacity, mounted so as to be visible to the nozzle operator. The container or tank shall also be equipped with a mechanical power driven agitator capable of keeping all the solids in the mixture in complete suspension at all times until used. The unit shall also be equipped with a pressure pump capable of delivering 100 gallons per minute at a pressure of 100 pounds per square inch. The pump shall be mounted in a line which will recirculate the mixture through the tank whenever it is not being sprayed from the nozzle. All pump passages and pipelines shall be capable of providing clearance for 5/8 inch solids. The power unit for the pump and agitator shall have controls mounted so as to be accessible to the nozzle operator. There shall be an indicating pressure gauge connected and mounted immediately at the back of the nozzle. D. Homogeneously mix a slurry containing up to forty (40) pounds of fiber plus a combined total of seventy (70) pounds of fertilizer solids for each one hundred (100) gallons of water. The slurry distribution lines shall be large enough to prevent stoppage. The discharge line shall be equipped with a set of hydraulic spray nozzles which provide even distribution of the slurry on the slopes to be seeded. Nozzles or spray shall never be directed toward the ground in such a manner as might produce erosion or runoff. The slurry tank shall have a minimum capacity of eight hundred (800) gallons and shall self-propelled or drawn with a separate unit which will place the slurry tank and spray nozzles within sufficient proximity to the areas to be seeded so as to provide uniform distribution without waste. The Landscape Architect may authorize equipment with smaller tank capacity provided that the equipment has the necessary agitation system and sufficient pump capacity to spray the slurry in a uniform coat. Lawns and Grasses Houston, Texas Asakura Robinson Company

126 E. Particular care shall be exercised to insure that the application is made uniformly and at the prescribed rate and to guard against miss and overlapped areas. Proper predetermined quantities of the mixture in accordance with specifications shall be used to cover specified sections of known area. Check on the rate and uniformity of application may be made by observing the degree of wetting of the ground or by distributing test sheets or paper or pans over the area at intervals and observing the quantity of material deposited thereon. F. Operators of hydromulching equipment shall be thoroughly experienced in this type of application. Apply specified slurry mix in a motion to form a uniform mat at specified rate. G. Keep hydromulch within areas designated and keep from contact with other plant material. H. Slurry mixture which has not been applied within four (4) hours of mixing shall not be used and shall be removed from the site. I. After application, the Contractor shall not operate any equipment over the covered area. J. Immediately after application, thoroughly wash off any plant material, planting areas, or paved areas not intended to receive slurry mix. Keep all paved and planting areas clean during maintenance operations. K. The Contractor shall guarantee a good healthy stand of grass. Areas which fail to germinate within a reasonable period of time shall be reseeded until a healthy stand of grass is attained. 4.2 Top Dress Fertilizer A. Apply top dress fertilizer at the rate of six (6) pounds per 1,000 square feet at 25 days after seeding or sodding. 4.3 Sodding on Prepared Finished Grade: A. Do not commence sodding operation until irrigation system is certified complete by the Landscape Architect and Owner. B. Bed Preparation: 1. Remove any weed or other volunteer plant growth from lawn areas by excavation and / or herbicides. Fine grade all lawn areas with a minimum application of 3 top soil. Spread topsoil by hand raking, breaking up lumps and providing a smooth even friable bed. Fine grade topsoil so finish grade is 1 below adjacent tops of edging, curbs and walks. Limit fine grading to areas which can be planted immediately after grading. Where proposed lawn meets existing lawn cut grade at limit so top of new sod is even with existing grade. 2. Immediately after the finished grade has been approved, begin sodding operations to reduce excessive week growth. If soil is dry immediately prior to sod installation, dampen surface with a fine mist of water. C. Installation: Lawns and Grasses Houston, Texas Asakura Robinson Company

127 1. Lay sod so that adjacent strips butt tightly with no spaces between strips. Sod joints shall butt evenly with no overlap. Discard sod with irregular edges, discolored, uneven thickness or insufficient topsoil. Lay sod on mounds and slopes with strips parallel to contours. Stagger joints. Sodded areas shall be flush with adjoining seeded areas. 2. Peg sod on slopes three to one or steeper with pegs driven through sod into soil until pegs are plush with turf. Space pegs 18 inches on center. Pegs to be one inch (1") square by six inches (6") long pine or six inch (6") lengths of lath or similar approved device. 3. Roll sod to eliminate any undulation or unevenness of finished grade. 4. Sod joint shall be top dressed with sharp sand. Roll again to achieve an even uniform lawn. 5. Water sod thoroughly within 45 minutes of laying with water truck, firehouse or similar method to deliver quick application of water. 6. Trim all sod edges and planting bed edges by the end of the same day as adjacent sod is laid. Hand water trim pieces as above. 7. Immediately after installation of the sod, remove sod clumps and soil. Keep all areas clean during the maintenance period. 4.4 Repair of Existing Turf A. All areas within this contract not disturbed by construction or where repair of grade is not required shall be overseeded with a cyclone or equivalent type machine at one half the rate of the specified hydroseed mix. B. Apply full rate of post seeding fertilizer as specified above. 4.5 Maintenance by the Contractor A. Maintenance under this contract shall commence immediately and include the care and periodical mowing as required to keep the site clean and presentable. B. The Contractor's maintenance period shall begin upon issuance of the Notice to Proceed and shall not be complete until final acceptance by the Owner or Owner's representative. C. The Contractor's maintenance of new turf planting shall consist of watering, weeding, repair of all erosion and resodding as necessary to establish a uniform stand of specified grasses. Contractor shall guarantee growth and coverage of planting under this contract to the effect that all turf areas will be covered with specified planting after sixty (60) days with no bare spots greater than four (4) square feet. Any sod panels that are dead or dying shall be replaced. D. Mowing shall be performed by the Owner. Lawns and Grasses Houston, Texas Asakura Robinson Company

128 E. The Contractor shall not be held responsible for failures due to neglect by the Owner, vandalism, etc., during the Guarantee Period. Report such conditions to the Landscape Architect in writing. 4.6 Final Acceptance (End of Maintenance Period) Work under this section will be accepted by Landscape Architect upon satisfactory completion of all work, but exclusive of re-application under the Guarantee Period. Final Acceptance of lawn establishment shall be as follows: Full coverage of all areas hydroseeded with full even coat of hydroseed mulch. Thin areas shall be reapplied. Schedule overseeding operations with Owner or Landscape Architect for observation of method and confirmation of application and conformity to rates specified. 4.7 Clean Up Keep all areas of work clean, neat, and orderly at all times. Keep all paved areas clean during lawn installation operations. Clean up and remove all deleterious materials and debris from the entire work area prior to Final Acceptance to the satisfaction of Landscape Architect. END OF SECTION Lawns and Grasses Houston, Texas Asakura Robinson Company

129 SECTION PLANTING 1.0 GENERAL 1.1 Work Included A. This Section includes specifications for furnishing and installing planting materials including: 1. Organic fertilizer 2. Chemical fertilizer 3. Mulch 1.2 Related Sections 4. Planting accessories 5. Inspecting material A. Mulches, Chemicals and Nutrients: Section B. Irrigation: Section Standards A. American National Standards Institute (ANSI)/American Association of Nurserymen (AAN): ANSI Z "Nursery Stock". B. "Grades and Standards", latest edition, Texas Association of Nurserymen Specifications, Austin, Texas C. Perform work in accordance with all applicable laws, codes, and regulations required by authorities having jurisdiction over such work and provide for all inspections and permits required by Federal, State, and local authorities in furnishing, transporting, and installing materials. 1.4 Material Inspections A. Plants shall be subject to inspection and approval by Landscape Architect at place of growth and upon delivery for conformity to specifications. Landscape architect may reject plant material that in his opinion does not conform to specifications. Submit a written or verbal request for inspection of plant material to Landscape Architect at least five (5) days prior to preferred date. The Landscape Architect reserves the right to refuse inspection at this time if, in his judgment, a sufficient quantity of plants is not available for inspection. The Contractor shall submit a primary and alternate source for material. Should neither of those sources be acceptable, additional cost incurred by the Owner to find and approve suitable material shall be back-charged from this contract. Planting Houston, Texas Asakura Robinson Company

130 B. Substitutions of plant materials will not be permitted unless authorized in writing by Landscape Architect. If proof is submitted that any plant specified is not obtainable, a proposal will be considered for use of the nearest equivalent size or variety with corresponding adjustment of Contract Price. Such proof shall be substantiated and submitted in writing to Landscape Architect at least thirty (30) days prior to start of Work under this Section. These provisions shall not relieve Contractor of the responsibility of obtaining specified materials in advance if special growing conditions, or other arrangements must be made in order to supply specified materials. C. Inspection: Make written request for inspection after planting operation have been completed. Such inspection is for the purpose of establishing the maintenance period. D. Submit written request for inspections to the landscape architect 5 working days prior to anticipated inspection date. 1.5 SUBMITTALS A. Furnish required copies of manufacturers literature, samples, certifications, or laboratory analytical data for the following items: 1. Tree, shrubs and groundcovers (Samples and / or photographs) 2. Planting backfill mix (sample bag) 3. Mulch (manufacturer s literature and samples) 4. Tree and shrub planting fertilizer (certification or laboratory analytical data) 5. Tree paint (manufacturer s, literature) 6. Subdrainage materials (pipes, gravel, soil separator) 7. Geotextile Fabric 1.6 Plant Material Delivery, Storage and Handling A. The following considerations for product handling shall be evaluated: 1. During hot weather and when practical, the Contractor may be required to transport plant materials between sunset and sunrise if transported in an open trailer or unrefrigerated van. 2. Dug material should be maintained and watered as required at the nursery to guarantee their vitality and health until shipping. 3. Protect from all damage trunks, stems, branches and root balls during tree tying, wrapping and loading operations. 4. Load containers onto transport vehicle and secure in a manner that protects the structural integrity of the root balls and branches. 5. The Contractor shall be solely responsible for the safe transportation of plants to the site and their condition upon arrival. Trees damaged, dehydrated or abused during transit and storage will be rejected. Planting Houston, Texas Asakura Robinson Company

131 6. Plant materials should not be stored on concrete or left exposed to examples of climate without adequate protection. 7. Protect the root balls and water regularly until planting. If trees are left in storage over the weekend or holiday provide a means of periodical watering and inspection of container moisture. 8. B & B material shall be stored and maintained in a manner which affords protection from dehydration and damage of root ball. Balls shall be wrapped and stored in mulch or approved containers. B. The Landscape Architect may inspect any phase of this operation and may reject any plant material improperly handled during any point of this operation. C. Nothing in this Section shall be interpreted as relieving the Contractor of his responsibility to provide healthy, viable plants, nor shall it have any affect upon the terms of the warranty specified herein. 1.7 Incidental Repairs A. The Landscape Contractor shall coordinate repairs of damage to irrigation system incidental to the planting operation by either own forces or by Irrigation Subcontractor. Above repairs shall be made immediately so as to not interfere with the automatic cycling of the irrigation system. All repairs shall be permanent and include all flushing required to clean the lines of debris deposited by such damage. B. Incidental damage to work by other subcontractors during landscape installation shall be made immediately and at no extra cost to the owner. 2.0 MATERIALS 2.1 Plants A. Plants shall be nursery grown in accordance with good horticultural practices under climatic conditions similar to those of project for at least 12 (twelve) months unless specifically otherwise authorized by Landscape Architect in writing. Unless specifically noted otherwise, all plants shall be heavy, symmetrical, tightly knit, so trained or favored in development and appearance as to be superior in form, number of branches, compactness and symmetry. B. Plants shall be sound, healthy and vigorous, well branched and densely foliated when in leaf. They shall be free of disease, insect pests, eggs, or larvae, and shall have healthy, well developed root systems. They shall be free from physical damage or adverse conditions that would prevent thriving growth. C. Plants shall be true to species and variety and shall conform to measurements specified except that plants larger than specified may be used if approved by Landscape Architect. Use of such plants shall not increase Contract price. If larger plants are approved, the ball of earth or container size shall be increased as specified under Applicable Standards and subject to the approval of the Landscape Architect. Planting Houston, Texas Asakura Robinson Company

132 D. Plants shall be measured when branches are in their normal position. Height and spread dimensions specified refer to main body of plant and not branch tip to tip. Caliper measurement shall be taken at a point on the trunk six inches (6") above natural ground four inches (4") in caliper and at a point twelve inches (12") above the natural ground line for trees over four inches (4") in caliper. If a range of size is given, no plant shall be less than the minimum size and not less than 40% of the plants shall be as large as the maximum size specified. The measurements specified are the minimum size acceptable and are the measurements after pruning, where pruning is required. Plants that meet the measurements specified, but do not possess a normal balance between height and spread shall be rejected. E. Container stock shall have grown in the containers in which delivered for at least six months, but not over two years. Samples must prove no rootbound conditions exist. No container plants that have cracked or broken balls or earth when taken from container shall be planned. Container stock shall not be pruned before delivery. Field grown plants recently transplanted into containers will not be accepted. F. Balled and burlapped trees, when accepted, shall have a root ball size of ten (10X) times the caliper. 1. Nursery grown B&B material shall be first pruned and thinned at the place of growth immediately prior to digging as required for packaging and safe moving. Method or pruning shall be as approved in the field by the Landscape Architect. Do not remove self-locking tags during this pruning prior to delivery to site. Final pruning shall take place at the site. G. Trees which have damaged or crooked leaders, or multiple leaders, unless specified, will be rejected. Trees with abrasions of the bark, sun scalds, disfiguring knots, or fresh cuts of limbs over 3/4" which have not completely callused, will be rejected. H. Method of pruning shall be as approved in the field by the Landscape Architect. Do not remove self-locking tags during this pruning prior to delivery to site. Final pruning shall take place at the site. I. Plant Materials 1. Refer to landscape plans for Plant Schedule. J. Plant Material should come from within 100 mile radius of job site if available, A limit of a 500 mile radius from jobsite should not be exceeded in order to comply with LEED checklist concerning regional material 2.2 Guying Materials A. The Contractor shall use guying materials necessary to meet the requirements herein. 1. Pressure-treated 2" diameter lodge poles, "Wolman" treated, as provided by Bourbow Valley Company or equivalent. 2. Ties: Flexible strapping / Black rubber tire or other tie, as approved. Planting Houston, Texas Asakura Robinson Company

133 3. Tree Guying Material: Galvanized aircraft cable (7 x 19 GAC) D Galvanized nails. (if applicable) 5. Hardware a. Guying cable: 7 x 19 aircord, size as specified. b. Turnbuckles: galvanized or dip-painted, size as specified. c. 2 Hole Crimping Clamps: Galvanized or copper, size as required. d. Plastic guy covers: 3/8 "diameter x 3 'long white plastic tubing. e. Duckbill anchors (for reference only) 2.3 Water A. Furnished by Owner. Transport as required. 2.4 Pre-Emergence Weed Control 2.5 Mulch A. In areas of Woody Ornamental Plants Amaze as manufactured by Greenlight Products Company, San Antonio, Texas or approved equal. Under no circumstances shall this be done in areas that are to be seeded. A. Shredded pine, oak, or hardwood bark; shall be the product of standard stripping of bark from pine trees for fiber or pulp manufacturing. Bark shall be shredded in a manner where large pieces are at a minimum. The mulch shall be free of debris. 2.6 Pipe for Watering Tube A. Shall be perforated Polyvinyl Chloride pipe, Type (SDR 35), gray in color. 2.7 Planting Mix A. See Section "Planting Media". 2.8 Fertilizer (trees and shrubs) A. Post planting fertilization (shrubs and groundcover) 1. "Osmocote" Sierrablend. Apply at manufacturer's recommendation rate. 2.9 Steel Edging A. Shall be equal to that manufactured by the Ryerson Steel Company. Planting Houston, Texas Asakura Robinson Company

134 2.0 Geotextile Fabric A. Typar #3401 termanlly spunbonded polypropylene, non woven, weed control fabric, 4.0 oz / lineal yard weight (American Excelsior or equal). Needle punched material is not acceptable. 3.0 EXECUTION 3.1 Layout and Excavation of Planting Areas A. Layout plants in locations shown on drawings. Use wire stakes color-coded for each species of plant material. Stake location of each tree and major shrub and outline of shrub and groundcover beds. B. The Landscape Architect will check location of plants in the field and shall adjust to exact position before planting begins. C. If underground obstructions are encountered notify the Landscape Architect as to whether an adjustment or change of location is possible within the design intent. If the Contractor is allowed to adjust or change location, rather than remove the obstruction, he shall make the change at no expense to the Owner. Backfill and tamp abandoned pits have obstructions which cannot be removed. See contract drawings for further information. 3.2 Excavation to Subgrade for Planting Area and Verification of Finished Grade A. Excavate all planting areas (pit and beds) to required depth as hereinafter specified and stockpile enough material to prepare planting mix for all plants. Remove excess material from site. B. Verify that required grades are within two (2 ) inches of required subgrade provided under a separate contract, and excavate further as may be required. C. Subsoil shall not be worked when moisture content is so great that excessive compaction will not occur, nor when it is so dry that clods will not break readily. Water shall be applied, if necessary, to bring soil to an optimum moisture content before tilling and planting. D. Do not excavate tree pits more than 24 hours in advance of planting operation. Excavate container grown tree pits to the following dimensions: Excavation for Width Depth Boxed Trees Box + 24 in. Ball + 6 in. Container grown Trees Cont in. Ball + 6 in. B&B Trees Ball + 12 in. Ball + 6 in. Container grown Shrubs Cont in. Ball + 4 in 1. Excavation for trees pits in areas of select fill (crushed and compacted limestone or similar) shall be twice as wide and twice as deep as given root ball. Fill bottom Planting Houston, Texas Asakura Robinson Company

135 four inches of tree pit with gravel and cover with soil separator before backfilling pit. E. Excavate shrub and ground cover beds to the following depths: Excavation for Width Depth Shrubs & Entire Bed Cont. + 4 in., not to be less than Groundcover Entire Bed Cont. +4 in., not less than 8 in F. Rip or cultivates subgrade in pits and beds to a depth of three (3 ) inches minimum. 3.3 Drainage, Detrimental Soils and Obstructions A. Test drainage of plant beds and pits by filling with water twice in succession. Conditions permitting the retention of water in planting beds for more than twenty-four (24) hours or percolation of less than one (1") inch per hour shall be brought to the attention of the Landscape Architect. B. Notify the Landscape Architect of all soil or drainage conditions Contractor considers detrimental to growth of plant material. (State condition and submit proposal and cost estimate for correcting condition.) C. If rock, hardpan, underground construction work, tree roots or other obstructions are encountered in the excavation of plant pits and beds, alternate locations may be selected by Landscape Architect. Where locations cannot be changed, submit cost required to remove the obstructions to a depth of not less than six (6") inches below the required pit or bed depth. Proceed with work after approval. 3.4 Preparing Plant Materials for Planting A. Container grown stock shall be removed carefully and handled only by the root ball. Do not lift or handle container plants by tops, stems, or trunks at any time. B. Do not bind or handle any plant with wire or rope at any time so as to damage bark or break branches. Lift and handle plants only from bottom of ball. C. Balled and burlapped (B&B) plants shall have firm balls of earth. Plants moved with a ball will not be accepted if the ball is cracked or broken before or during planting operations. B&B material shall be dug only when dormant. Pre-dug stored B&B material shall be inspected and approved at the storage site. 3.5 Installation of Pit Planted Materials A. Do not commence any planting until the irrigation system is completely automated or can be operated manually. B. Fill plant pits with soil mix to compact depth to receive plant root ball, so top of root ball is two (2") inches above finished grade. C. Install PVC watering tubes in tree pits, vertically, at edge of pit as shown. Planting Houston, Texas Asakura Robinson Company

136 D. Scarify the walls and bottom of all plant pits immediately prior to the placement of plant and backfill mix. The Contractor shall remove all glazing caused by an auger or mechanical hole digger. E. For boxed & container grown material, break vertical bands and remove top and bottom of container. Carefully lower plant into pit with backhoe or approved method and adjust elevation. Cut horizontal banks and remove sides. Prune away girdled roots and tease root hair masses. Carefully fill pit and compact by watering in to support root ball. F. Place B&B plants carefully in the prepared planting pit. Do not disturb root ball or untie twine or roping until backfill settlement is complete and tree is staked, if applicable. Fill planting pit by flooding each eight (8") inches of backfill for balls greater than 24" diameter. Wrap trunks with double layer of tree wrap. G. Smooth planted areas to conform to specified grades after full settlement has occurred. Contractor shall bear final responsibility for proper surface drainage of planted areas. Any discrepancy in the drawings or specifications, obstructions on the site, or prior work done by another party, which Contractor feels precludes establishing proper drainage, shall be brought to the attention of the Landscape Architect in writing. H. Mulch circles shall not exceed width of root mass by more than 4". Mulch circles shall meet lawn or bed grades evenly and smoothly. I. Water all plants immediately again after planting. J. Apply pre-emergent weed control material in areas to receive mulch. K. Spread mulch in required areas to the compacted depth of two (2") inches. 3.6 Installation of Bed Planted Materials A. Install steel edging where shown. Anchor with steel stakes spaced not more than three (3 ) feet O.C. or as per often as necessary to have smooth radius or straight tangent. Drive stake to one (1 ) inch below top of edging. B. Fill all shrub and groundcover beds with plant bed mix to finished grade (compacted) plus two (2 ) inches minimum. C. Excavate in planting mix for individual plant and install as required. Set plant plumb and brace rigidly in position until planting soil mix has been tamped solidly around the ball and roots. D. When plant pits have been backfilled approximately two-thirds (2/3) full, fertilizer per manufacturer' recommendations at the maximum rate. E. Water plant thoroughly, saturating root ball, before installing remainder of the planting soil to top of pit, eliminating all air pockets. Top of root ball shall be two (2 ) inches above finished grade. Planting Houston, Texas Asakura Robinson Company

137 F. Smooth planting areas to conform to specified grade after full settlement has occurred. Contractor shall bear final responsibility for proper surface drainage of planting areas. G. Water all plants immediately again after planting. H. Apply pre-emergent weed control material over entire area to receive mulch. I. Mulch all shrub and groundcover beds to three (3 ) thick. 3.7 Surface Drainage of Planting Areas A. Contractor shall bear final responsibility for proper surface drainage of planted areas. Any discrepancy in the drawings or specifications, obstructions on the site, or prior work done by another party, which Contractor feels precludes establishing proper drainage, shall be brought to the attention of the Landscape Architect in writing. 3.8 Post Planting Fertilization A. Tree Planting 1. Apply fertilizer days after installation. 2. Inject material specified in Section 2 with a high pressure injector into soil at depth and diameter shown below. Tree Caliper Application Radius Depth Application Points Rate Per Tree Under 2" 3 4" - 6" 16" - 18" 1-1/2 2" - 4" 3 4" - 6" 18" - 24" 2 4" - 5" 4 4" - 6" 2' - 3' 2-1/2 5" - 6" 5 4" - 6" 3' - 4' Pruning Above 6" 3' 0. C. 4" - 6" 5 gal./100 sq.ft. Root Area (Drip Line) A. Prune containerized plants only at time of planting and according to standard horticultural practice to preserve the natural character of the plant. Prune by removing entangled branching and by removing crotches. Avoid removing branch tips wherever possible. Pruning shall be done under supervision of the Landscape Architect. B. Remove all dead wood, suckers, and broken or badly bruised branches. Use only clean, sharp tools. Planting Houston, Texas Asakura Robinson Company

138 3.0 Staking 3.1 Guying C. Prune lower branching from trees to a height of 18" above ground per 1 1/4" caliper. D. Prune B&B material in addition to place of growth as may be directed by Landscape Architect by removing a percentage of interior branching proportional to the root loss during digging (up to 1/3). A. The Contractor, will be responsible for material remaining plumb and straight for all given conditions through the guarantee period. Tree support shall be done as outlined on the following tables and as illustrated on the details. B. Trees should be staked during the same day as planting. Plants shall stand plumb after staking. C. Stake all trees under 3 inches caliper in accordance with the following table: Tree Caliper Stakes Length Stake Size To 1-3/4 in. 2 8' Lodge/pole (2" dia) 2 in. to 3 in. 2 8' Lodge/pole (2" dia) A. Guying shall be completed immediately after planting in accordance with the following table. Where manufactured product is specified, install per manufacturer's instructions. Plants shall stand plumb after guying. Palm Tree anchoring shall be Palm Tree Anchor Kit as supplies by Houston Palm Tree Inc., Gulf Freeway, League City, Texas, ph: or approved equal. B. Guy trees at points of branching with guys spaced equally around and outside perimeter of ball. Wrap rubber tire straps at points of contact with bark positioned at crotches and fasten to a deadman with specified cable with double crimp clamp. One turnbuckle shall be provided for each guy. Tree Caliper at No. Cable 12" Above Grade Guys Size Deadmen 3-1/4" to 4-1/2" 3 1/8" Diam. Duck Bill 7 x 7 Galvanized Earth Anchor Steel Cable Model 68 DTS Kit 4-3/4" to 6" 3 1/8" Diam. Duck Bill System 7 x 7 Galvanized Model 68 DTS Kit Steel Cable 6-1/4" to 8" 3 3/16" Diam. Duck Bill System Model 88 DTS Kit Planting Houston, Texas Asakura Robinson Company

139 3.2 Maintenance by the Contractor A. The Contractor shall begin maintenance after each plant is installed and continue until Final Acceptance. B. The Contractor's Maintenance Period shall begin upon inspection and approval at Substantial Completion and shall be for 120 days. C. The Contractor's maintenance of new planting shall consist of watering, cultivating, weeding, mulching, re-staking, tightening and repair of guys, resetting plants to proper grades or upright position, and furnishing and applying such pesticide sprays and invigorates as are necessary to keep the plantings free of insects and disease and in thriving condition. D. Protect planting areas and plants at all times against damage of all kinds for duration of maintenance period. Maintenance includes temporary protection barriers and signs as required for protection. If any plants become damaged or injured, because sufficient protection was not provided, treat or replace as directed by Landscape Architect at no additional cost to Owner. 3.3 Final Acceptance A. Work under this Section will be accepted by Landscape Architect upon satisfactory completion of all work, including maintenance, but exclusive of replacement of plant materials under the Warranty Period. Upon termination of maintenance period, the Owner will assume responsibility for maintenance of the work. 3.4 Warranty A. Planting shall be warranted by the Contractor to remain alive and healthy for a period of 12 months after the date of Substantial Completion. Plants in an impaired, dead or dying condition after initial acceptance or within 12 months shall be removed and replaced. New planting and method of placing shall comply with the requirements of the specifications. Plants replacing those removed during the guarantee period shall also be guaranteed to remain alive and healthy for an additional 12 months after installation and acceptance. B. Contractor shall not be held responsible for failure due to neglect by Owner, vandalism, Acts of God, during Warranty Period. Report such conditions to the Landscape Architect in writing when discovered. C. Contractor shall indicate during Pre-Bid regarding warranty status of plant material in the case of no irrigation system provided in the project. D. Submit a letter of warranty containing the following information: 1. "We hereby guarantee that the landscape planting we have furnished and installed is free from disease and in good condition, and the work has been completed in accordance with the drawings and specifications, ordinary wear and tear and unusual abuse, or neglect excepted. Planting Houston, Texas Asakura Robinson Company

140 We agree to repair or replace any defects in material or workmanship which may develop during the period of one (1) year from acceptance, and also to repair or replace any damage resulting from the repairing or replacing of such defects, at no additional cost to the Owner. We shall make such repairs or replacements within a reasonable time, as determined by the Owner, after receipt of written notice. In the event of our failure to make such repairs or replacements within a reasonable time after receipt of written notice from the Owner by Certified Mail, we authorize the Owner to proceed to have said repairs or replacements made at our expense, and we will pay the costs and charges therefore, upon demand. 3.5 Clean Up A. Clean up all areas as required for complete and acceptable inspection. B. It is Contractor s responsibilities to replace or restore any damaged or disturbed areas during planting operation back to it s original condition. 3.6 Inspections A. Submit requests for inspections to the Landscape Architect at least five (5) days prior to anticipated inspection date. END OF SECTION Planting Houston, Texas Asakura Robinson Company

141 SECTION DRAINAGE PART 1 - GENERAL 1.1 SCOPE OF WORK A. This Section specifies the requirements for furnishing and placing drainage pipe, laterals, stubs, and appurtenances. The pipe shall be of the size, type and location, and to the lines, grades and elevations shown on the plans and constructed in accordance with these specifications. 1.2 APPLICABLE PUBLICATIONS A. The following publications of the latest issues listed below, but referred to thereafter by basic designation only, form a part of this specification to the extent indicated by the references thereto. 1. American Society for Testing and Materials Standards (ASTM). a. A 48 Specification for Gray Iron Castings. b. A 615 Specification for Deformed and Plain Carbon -Steel Bars for Concrete Reinforcement. c. C 32 Specification for Sewer and Manhole Brick (Made from Clay or Shale) d. C 76 Specification for Reinforced Concrete Culvert, Storm Drain and Sewer Pipe. e. C 443 Specification for Joints for Concrete Pipe and Manholes, Using Rubber Gaskets. f. C 476 Specification for Grout for Masonry g. C 478 Specification for Precast Reinforced Manhole Sections. h. C 1433 Specification for Precast Reinforced Concrete Monolithic Box Sections for Culverts, Storm Drains, and Sewers. i. D 3034 Specification for Type PSM Poly (Vinyl Chloride) (PVC) Sewer Pipe and Fittings. j. D 3212 Specification for Joints for Drain and Sewer Plastic Pipes Using Flexible Elastomeric Seals. k. F 679 Specification for Poly (Vinyl Chloride) (PVC) Large-Diameter Plastic Gravity Sewer Pipe and Fittings. l. F 758 Specification for Smooth-Wall Poly (Vinyl Chloride) (PVC) Plastic Underdrain Systems for Highway, Airport and Similar Drainage. m. A 746 Specification for Ductile Iron Gravity Sewer Pipe. n. F 477 Standard Specification for Elastomeric Seals (Gaskets) for Joining Plastic Pipe o. C 150 Standard Specification for Portland Cement p. C 33 Standard Specification for Concrete Aggregates 2. Texas Department of Transportation 2004 Standard Specifications for Construction of Highways, Streets and Bridges (TxDOT). a. Item 460 Corrugated Metal Pipe. b. Item 462 Concrete Box Culverts and Sewers. c. Item 465 Manholes and Inlets d. Item 466 Headwalls and Wingwalls e. Item 467 Safety End Treatment Drainage Houston, Texas

142 f. Item 476 Jacking, Boring or Tunneling Pipe or Box g. Item 479 Adjusting Manholes and Inlets 3. American Water Works Association (AWWA) a. C 110 AWWA Standard for Ductile-Iron and Gray-Iron Fittings. 1.3 RELATED WORK SPECIFIED ELSEWHERE A. Section Trenching, Backfilling and Compaction B. Section Trench Safety 1.4 PROJECT CONDITIONS A. When working with storm manholes new or existing, contractor must keep requirements for confined space entries. In all activities, contractor shall work in a safe manner as required by OSHA and other governing criteria. B. Interruption of Existing Storm Drainage Service: Do not interrupt service to facilities occupied by Owner or others unless permitted under the following conditions and then only after arranging to provide temporary service according to requirements indicated: Notify Owner no fewer than three days in advance of proposed interruption of service. C. Do not proceed with interruption of service without Owner s written permission. D. If work requires interference with any public drainage systems within or outside of Public Rights of Way or Easements, contractor must obtain prior approval and coordinate with local municipality before commencing work 1.5 SUBMITTALS A. Product Data: For the following as used on the project: 1. Pipe material 2. Special pipe fittings, special fittings between dissimilar pipe materials, pressure type fittings, etc. 3. Backwater valves. 4. Drains. 5. Channel drainage systems. 6. Storage and leaching chambers. B. Shop Drawings: For the following: Drainage Houston, Texas

143 1. Cast in place manholes, inlets and catch basins: Include plans, elevations, sections, details, and frames and covers. Include design calculations, and concrete design-mix report 2. Stormwater Detention Structures: Include plans, elevations, sections, details, frames and covers, design calculations, and concrete design-mix report. C. Coordination Drawings: Show pipe sizes, locations, and elevations. Show other piping in same trench and clearances from storm drainage system piping. Indicate interface and spatial relationship between manholes, piping, and proximate structures. D. Profile Drawings (if not already shown in the plans): Show system piping in elevation. Draw profiles at horizontal scale of not less than 1 inch equals 50 feet and vertical scale of not less than 1 inch equals 5 feet. Indicate manholes and piping. Show types, sizes, materials, and elevations of other utilities crossing system piping. E. Field quality-control test reports. 1.6 QUALITY ASSURANCE (NOT USED) 1.7 DEFINITIONS A. LLDPE: Linear low-density, polyethylene plastic. B. PE: Polyethylene plastic. C. PP: Polypropylene plastic. D. PVC: Polyvinyl chloride plastic. PART 2 - PRODUCTS 2.1 PIPE A. Reinforced concrete pipe shall conform to ASTM C-76, wall B thickness for, Class III and Class IV as shown on the plans or as necessary to meet ASTM cover design requirements. B. Corrugated metal pipe shall conform to TxDOT Item 460 specifications. C. Polyvinyl Chloride (PVC) pipe 4 inch in diameter shall be DR 18 and conform to AWWA C900. PVC pipe 6 to 10 shall be SDR 26 and conform to ASTM PVC pipe 12 to 15 inch diameter shall be SDR35 and conform to ASTM D3034. Polyvinyl chloride pipe 18 to 36 inches shall be SDR35 and conform to ASTM F679. D. Precast box culverts shall conform to ASTM C 1433 and TxDOT Item 462. E. Polyvinyl Chloride Perforated pipe and fittings shall conform to ASTM F758. F. Ductile Iron Pipe (DIP) shall be Class 51 and conform to ASTM A-746. Drainage Houston, Texas

144 2.2 JOINTS A. Reinforced concrete pipe joints shall conform to ASTM C-443 Rubber Gaskets or approved equal. B. PVC pipe joints shall conform to ASTM D-3212 and ASTM F477 specifications. C. DIP pipe joints shall conform to AWWA C110, latest edition. 2.3 CONCRETE A. General: Cast-in-place concrete according to ACI 318, and the following for manholes and inlets: 1. Cement: ASTM C 150, Type II. 2. Fine Aggregate: ASTM C 33, sand. 3. Coarse Aggregate: ASTM C 33, crushed gravel. 4. Water a. Water used for mixing or curing shall be reasonably clean and free of oil, salt, acid, alkali, sugar, vegetable matter or other substances injurious to the finished product. b. Water sources other than the local municipal domestic water supply must be approved by the Owner. c. If onsite reclaimed water sources are used, tanks and apprentices must be clearly marked with the words non-potable water. B. Portland Cement Design Mix: 4000 psi minimum in 28 days, with 0.45 maximum water/cementitious materials ratio. 1. Reinforcement Bars: ASTM A 615, Grade 60 deformed steel. 2.4 BRICK A. Sewer brick for manholes, inlets and junction boxes shall be clay and shale masonry units that conform to ASTM C-32 grade MM. Compressive strength: 2200 psi min for individual brick; 2500 psi average for five bricks. 2.5 MORTAR A. Mortar for brick drainage structures and manholes shall conform to TxDOT Item 465.2(B) and ASTM C RIMS, GRATES AND FRAMES A. Castings for manhole and inlet rims, grates and frames shall conform to ASTM A 48, Class 35B gray iron or better quality. Drainage Houston, Texas

145 2.7 SAFETY END TREATMENTS A. Safety End Treatments shall conform to the products and installation requirements listed in TxDOT Item HEADWALLS AND WINGWALLS A. Headwalls and Wingwalls shall conform to the products and installation requirements listed in TXDOT Item 466 PART 3 - EXECUTION 3.1 PIPE SEWERS A. Open Trench Construction 1. Utilities have been located from surveys and available existing records. Not all utilities may be shown on the Drawings. Locate all utilities prior to beginning any construction activities. Start construction of storm drainage piping from lowest end and work back up to the highest flowline elevation. 2. No pipe shall be installed in the trench until excavation has been properly constructed per the plans and details to at least two (2) pipe lengths beyond the section of pipe being installed and the bottom of trench has been properly shaped. 3. Batter boards where used shall be placed into position properly. Boards shall be nominal 1 x 4 inch lumber, planed on all four sides to parallel faces. The boards and all location stakes must be protected from injury or change of location. 4. Pipe shall be so laid that after the sewer is completed the interior surface shall conform accurately to the grades and alignments fixed and given in the Plans. 5. All sewers must be laid accurately to line and grade, with tongue or spigot end downstream. 6. Pipes shall be fitted together and matched so that when laid, they form a sewer with a smooth and uniform invert. 7. When trenches exceed five feet in depth the Contractor shall utilize trench safety measures per Section Trench Safety. 3.2 MANHOLES, JUNCTION BOXES AND INLETS A. Manholes and inlets shall be constructed at locations shown on the plans and to the depth indicated thereon. B. Manholes may be constructed of brick, concrete or precast concrete sections and in all types shall be constructed to the dimensions shown on the plans. Drainage Houston, Texas

146 C. Inlets and junction boxes shall be constructed in accordance with the details shown on plans. D. Joints between precast concrete manhole and inlet sections shall be made by uniformly placing "Ram-Nek" flexible plastic gaskets or approved equal on all faces of the lower part of the joint and lowering the upper ring evenly into place to produce uniform bearing and compression on the sealer. E. The construction of manholes, junction boxes and inlets shall be done as soon as practical after sewer line into or through the manhole, junction box or inlet locations are completed. F. All sewers shall be cut neatly at the inside face of the walls of the manhole, junction box or inlet and pointed up with mortar. G. After the masonry work has been completed to the proper elevation, the cast iron manhole cover frame shall be set in a full mortar bed and adjusted to the elevation established on the drawings. H. The inverts of the sewer line or several sewer lines entering the manhole or junction box at or near the flow line elevation of the manhole or junction box shall be shaped and routed across the floor of the manhole or junction box using mortar to obtain the proper contour. I. Adjusting Manholes and Inlets shall conform to specifications in TxDOT Item FRAMES, GRATES, RINGS AND COVERS A. Castings shall conform to the type shown on the plans and shall be clean substantial castings, free from sand or blow holes or other defects. B. Surfaces of the castings shall be free from burnt-on sand and shall be reasonably smooth. C. Bearing surfaces between manhole rings and covers or grates and frames shall be cast or machined with such precision that uniform bearing shall be provided throughout the perimeter area of contact. D. Castings in pavement areas or areas designated to receive traffic loading shall be a heavy duty type capable of H-20 loading. 3.4 UNDERDRAIN SYSTEMS A. Pipe shall be laid per paragraph 3.1 and per the details on the plans. B. Prior to placing granular backfill and bedding, line trench with drainage fabric according to the details. The drainage fabric shall be Supac 4NP or approved equal. C. Granular bedding shall be prepared to a depth of 2 to 4 inches below the pipe invert. The pipe shall be laid with the perforations facing down. The granular backfill shall then be placed to the depth shown on the details. The filter fabric shall then be wrapped around the granular material with a minimum overlap at the top of 6 inches. Drainage Houston, Texas

147 D. Where vertical pipe risers penetrate the granular backfill to the surface, the drainage fabric shall be cut in an 'X' to accommodate the pipe penetration and then the fabric shall be sealed with a heavy duty tape to the pipe in the manner to insure the integrity of the filter fabric. END OF SECTION Drainage Houston, Texas

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