B. Missouri Office of Administration's Land Disturbance Permit No. MOR from the State of Missouri Department ofnatural Resources.

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1 Guhleman and Hearnes Boiler Plant Project Number: Ml SECTION SEDIMENT AND EROSION CONTROL PART 1 -GENERAL 1.1 RELATED DOCUMENTS Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections apply to this section. B. Missouri Office of Administration's Land Disturbance Permit No. MOR from the State of Missouri Department ofnatural Resources. C. The publications listed below form a part of this specification to the extent referenced. 1. Federal Water Pollution Control Act (Public Law , 92nd Congress), as currently amended. 2. United States Environmental Protection Agency, Document EPA-832-R (September, 1992), "Storm Water Management for Construction Activities, Developing Pollution Prevention Plans and Best Management Practices". 3. United States Environmental Protection Agency, Document EPA 833-R (May 2007), "Developing Your Stormwater Pollution Prevention Plan: A Guide for Construction Activities." 4. Missouri Clean Water Law (Chapter 644, R.S. Mo), as currently amended. 5. Missouri Department of Natural Resources publication, "Protecting Water Quality: A Field Guide to Erosion, Sediment, and Storm Water Best Management Practices for Development Sites in Missouri" (November, 1995). 6. The Mid American Association of Conservation Districts, Kansas City, Mo, "Protecting Water Quality," A field guide to erosion, sediment and stormwater best management practices for development sites in Missouri and Kansas. Latest Version. D. The latest revision of the following materials and testing standards shall apply to work under this section: 1. ASTM D Method for Measuring Thickness of Textile Materials 2. ASTM D Test Method for Biological Clogging of Geotextile or Soil/Geotextile Filters 3. ASTM D Test Method for Hydraulic Bursting Strength of Knitted Goods and Nonwoven Fabrics: Diaphragm Bursting Strength Tester Method 4. ASTM D Practice for Sampling ofgeosynthetics for Testing 5. ASTM D Test Method for Deterioration of Geotextiles from Exposure to Ultraviolet Light and Water (Xenon-Arc Type Apparatus) 6. ASTM D Terminology for Geotextiles 7. ASTM D Test Method for Trapezoid Tearing Strength ofgeotextiles 8. ASTM D Test Method for Tensile Properties of Geotextiles by the Wide-Width Strip Method 9. ASTM D Test Method for Grab Breaking Load and Elongation of Geotextiles SEDIMENT AND EROSION CONTROL

2 Guhleman and Hearnes Boiler Plant Project Number: Ml41 l ASTM D Test Method for Index Puncture Resistance of Geotextiles, Geomembranes, and Related Products 11. ASTM D Guide for Identification, Storage, and Handling of Geotextiles 12. ASTM F Specification for Corrugated Polyethylene Tubing and Fittings 13. ASTM F Specification for Large Diameter Corrugated Polyethylene Tubing and Fittings 1.2 WORK INCLUDED IN THIS SECTION Preparation of Storm Water Pollution Prevention Plans (SWPPP) in accordance with the requirements of MODNR, if required by the City of Fulton, City Engineer. The proposed work will disturb less than one acre. B. Requirements for minimizing soil loss and the transport of sediment from the site during construction and permanent erosion control after construction. C. Related Work in Other Sections: 1. Division 31 Section "Site Clearing". 2. Division 31 Section "Earth Moving". 1.3 LAND DISTURBANCE PERMITS General: The Contractor shall follow the Missouri State Operating Permit Number MOR for the discharge of storm water and other non-storm discharges (Land Disturbance Permit) that has been issued to the Missouri Office of Administration B. Contractor shall obtain Missouri Department of Natural Resources 401 Water Quality Certification and U.S. Army Corps of Engineers 404 Permit, as needed. 1.4 QUALITY ASSURANCE The Contractor shall designate an on-site representative who shall be responsible for all matters pertaining to water quality of storm discharges from the site. The on-site representative shall act as the permittee as called out in the Missouri Office of Administration's Land Disturbance Permit No. MOR B. The Contractor shall inspect and maintain all devices and procedures that function to prevent pollution of storm water or to remove pollutants from storm water or non-storm runoff from the site. BMPs shall be continually implemented and effective. 1.5 JOB CONDITIONS The Contractor shall inspect all disturbed areas on a regular schedule (at least once per week). If a rainfall causes stormwater runoff to occur onsite, the BMP must be inspected. These inspections must occur within 48 hours after the rain event has ceased during a normal work day and within 72 hours on the next business day if the rain even ceases during a non-work day SEDIMENT AND EROSION CONTROL

3 Guhleman and Hearnes Boiler Plant Project Number: M such as weekends or holidays. All BMPs and other pollution control measures shall be inspected for proper installation, operation, and maintenance. Locations where storm water leaves the site shall be inspected for evidence of erosion or sediment deposition. B. A log of each inspection and a current copy of all inspection reports shall be kept at the site or at an easily accessible location so that it can be made available at the time of an on-site visit or at the request of the Owner's Construction Representative. C. The Contractor shall notify all subcontractors, suppliers, private or public utility agencies, and other authorized parties performing work at the site what actions or precautions should be taken while on site to minimize the potential for erosion or damage to any erosion protection measures. D. The Contractor shall be responsible for repairs to BMPs damaged by others and stabilization of all areas disturbed by others. 1.6 SUB MITT ALS Submit shop drawings and/or manufacturer's product information and ce1tifications for the following: 1. Geotextile fabrics. 2. Mulches and Tackifiers 3. Other specialized products for proposed erosion protection measures. PART 2 - PRODUCTS 2.1 GEOTEXTILE F ABRlCS Filter Fabric: Mirafi 1 OOX, or approved equal. B. Silt Fence: Mirafi Envirofence, or approved equal. C. Silt Sock: Filtrexx SOXX, or approved equal. 2.2 MULCHES AND T ACKIFIERS Vegetative Mulch: Shall be straw from oats, rye, wheat or barley. The mulch shall be free of prohibited weed seed as stated in the Missouri Seed Law and shall be relatively free of all other noxious and undesirable seed. The mulch shall be clean and bright, relatively free of foreign matter and be dry enough to spread properly. 2.3 TEMPORARY COVER CROP SEEDING General: Shall only be permitted by written authorization from the Owner's Construction Representative. SEDIMENT AND EROSION CONTROL

4 Guhleman and Hearnes Boiler Plant Project Number: Ml41 l Avena sativa (Annual Oats), 98% purity, 90% germination, weed seed content not to exceed 0.25%. PART 3 - EXECUTION 3.1 GENERAL The Contractor shall install and maintain structural BMPs in accordance with the Construction Documents, the requirements of authorities having jurisdiction, and all applicable permits. Additionally, the Contractor shall implement non-structural site management BMPs as required to prevent contamination of all storm and/or non-storm discharges from the site. 3.2 PRESERVATION OF NATURAL VEGETATION Preservation of natural vegetation on site shall be planned before any site disturbance begins. The Contractor shall preserve all existing vegetation that falls beyond the construction limits indicated on the plans. 1. Comply with requirements in Division 31 Section "Site Clearing." 3.3 SILT FENCES Construction Requirements - Silt fences shall be installed prior to any major disturbance in the drainage area. Silt fences should be installed where there is even, overland flow, of relatively slow velocity. Silt fences should generally not be constructed in streams, ditches, or areas of concentrated, high velocity flows. The fence should be placed across the bottom of slopes, along a line of uniform elevation, perpendicular to the direction of flow. 1. Install silt fences in accordance with the details indicated on the Construction Documents, and Manufacturer's recommendations. B. Maintenance Requirements - The Contractor shall perform inspections and maintenance of silt fences after each rainfall. The Contractor shall repair all areas where runoff has eroded a channel beneath the fence, or where the fence was caused to sag or collapse by runoff flowing over the top. 1. Remove and properly dispose of sediment when it reaches one-half the height of the fence. 3.4 TEMPORARY COVER CROP SEEDING Construction Requirements - The season for temporary cover crop seeding shall be from April l to May 15 and August 15 to October 30. However, the actual seeding shall be done only during periods within the season which are normal for such work as determined by weather conditions and by accepted practice in the locality of the project. Only upon written approval by the Engineer may planting begin earlier or continue later than the dates specified. SEDIMENT AND EROSION CONTROL

5 Guhleman and Hearnes Boiler Plant Project Number: M All temporary cover crop areas shall be hydraulically seeded. Seed shall be added to bonded fiber matrix according to the manufacturers' specifications. The bonded fiber matrix slurry shall be applied from two directions to ensure proper coverage. 2. Keep mulch slurry out of plant beds and off of walks, structures, and areas not to be seeded. Clean up these areas to the satisfaction of the Engineer. 3. The seeding rate shall be 10 lbs./1000 s.f. B. Maintenance Requirements - Bare patches or washouts due to heavy rains prior to establishment of turf shall be re-graded as needed, scratched, and reseeded as often as may be necessary for establishment of turf. All costs for maintenance and repair of temporary cover crop areas shall be at the Contractor's expense. 3.5 MISCELLANEOUS All miscellaneous BMPs shall be installed and maintained in accordance with the requirements of the MODNR "Protecting Water Quality: A Field Guide to Erosion, Sediment, and Storm Water Best Management Practices for Development Sites in Missouri". Erosion and sedimentation control devices shall be maintained by the Contractor until such time that permanent turf has been established to such a level to prevent erosion and the transport of sediment. B. Remove erosion and sedimentation controls and restore and stabilize areas disturbed during removal. END OF SECTION SEDIMENT AND EROSION CONTROL

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7 Guhleman and Hearnes Boiler Plant Project Number: Ml41 l-05 SECTION SITE CLEARING PART 1 - GENERAL 1.1 RELATED DOCUMENTS Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section. 1.2 SUMMARY Section Includes: 1. Removing above- and below-grade site improvements. 2. Disconnecting, capping or sealing, removing site utilities, and abandoning site utilities in place. B. Related Sections: 1. Division 31 Section "Sediment and Erosion Control" for control of storm water on site and prevention of sediment leaving the site. 2. Division 31 Section "Earth Moving" for excavation and backfill for utilities, structures, buildings and pavements. 1.3 DEFINITIONS Subsoil: Soil beneath the level of subgrade; soil beneath the topsoil layers of a naturally occurring soil profile, typified by less than 1 percent organic matter and few soil organisms. B. Surface Soil: Soil that is present at the top layer of the existing soil profile. In undisturbed areas, surface soil is typically called "topsoil," but in disturbed areas such as urban environments, the surface soil can be subsoil. C. Topsoil: Top layer of the soil profile consisting of existing native surface topsoil or existing inplace surface soil; the zone where plant roots grow. Its appearance is generally 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 larger than 1 inches (25 mm) in diameter; and free of weeds, roots, toxic materials, or other non-soil materials. D. Vegetation: Trees, shrubs, groundcovers, grass, and other plants. 1.4 MATERIAL OWNERSHIP Except for materials indicated to be stockpiled or otherwise remain Owner's property, cleared materials shall become Contractor's property and shall be removed from Project site. SITE CLEARING

8 Guhleman and Hearnes Boiler Plant Project Number: Ml B. Historic items, relics, antiques, and similar objects including, but not limited to, cornerstones and their contents, commemorative plaques and tablets, and other items of interest or value to Owner that may be uncovered during demolition remain the property of Owner. 1. Carefully salvage in a manner to prevent damage and promptly return to Owner. 1.5 SUB MITT ALS Record Drawings: Identify and accurately show locations of capped utilities and other subsurface structural, electrical, and mechanical conditions. 1.6 PROJECT CONDITIONS Traffic: Minimize interference with adjoining roads, streets, walks, and other adjacent occupied or used facilities during site-clearing operations. 1. Do not close or obstruct streets, 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 Owner or authorities having jurisdiction. B. Utility Locator Service: Notify Missouri One Call for area where Project is located before site clearing. C. Do not commence site clearing operations until temporary erosion- and sedimentation-control measures are in place. PART 2 - PRODUCTS 2.1 MATERIALS Satisfactory Soil Material: Requirements for satisfactory soil material are specified in Section "Earth Moving." 1. Obtain approved borrow soil material off-site when satisfactory soil material is not available on-site. All borrow material shall be approved by the Owner's Construction Representative. PART 3 - EXECUTION 3.1 PREPARATION Protect and maintain benchmarks and survey control points from disturbance during construction. B. Protect existing site improvements to remain from damage during construction. SITE CLEARING

9 Guhleman and Hearnes Boiler Plant Project Number: Ml4l l Restore damaged improvements to their original condition, as acceptable to Owner's Construction Representative. 3.2 TREE AND PLANT PROTECTION Repair or replace trees, shrubs, and other vegetation indicated to remain or be relocated that are damaged by construction operations in a manner approved by the Owner's Construction Representative. 3.3 EXISTING UTILITIES Locate, identify, disconnect, and seal or cap utilities indicated to be removed or abandoned in place. 1. Arrange with utility companies and Owner's Construction Representative to shut off indicated utilities. B. Locate, identify, and disconnect utilities indicated to be abandoned in place. C. Interrupting Existing Utilities: Do not interrupt 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: I. Notify Owner not less than two days in advance of proposed utility interruptions. 2. Do not proceed with utility interruptions without Owner's Construction Representative's written permission. 3. Do not open or close any water valves or hydrants. Water Department personnel shall open or close all water valves and hydrants as coordinated with the Contractor. D. Excavate for and remove underground utilities indicated to be removed. 3.4 CLEARING AND GRUBBING Remove obstructions, shrubs, and other vegetation to permit installation of new construction. 1. Do not remove trees, shrubs, and other vegetation indicated to remain. 2. Remove obstructions and debris to a depth of 18 inches ( 450 mm) below exposed sub grade. B. Fill depressions caused by clearing and grubbing operations with satisfactory soil material unless further excavation or earthwork is indicated. L Place fill material in horizontal layers not exceeding a loose depth of 8 inches (200 mm), and compact each layer to a density equal to adjacent original ground. SITE CLEARING

10 Guhleman and Hearnes Boiler Plant Project Number: M SITE IMPROVEMENTS Remove existing above- and below-grade improvements as indicated and 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 along line of existing pavement to remain before removing adjacent existing pavement. Saw-cut faces vertically. 2. Paint cut ends of steel reinforcement in concrete to remain with two coats of antirust coating, following coating manufacturer's written instructions. Keep paint off surfaces that will remain exposed. 3.6 DISPOSAL OF SURPLUS AND WASTE MATERIALS Remove surplus soil material, unsuitable topsoil, obstructions, demolished materials, and waste materials including trash and debris, and legally dispose of them off Owner's property, or onsite at the direction of the Owner's Construction Representative. B. 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. Do not interfere with other Project work. END OF SECTION SITE CLEARING

11 Guhleman and Hearnes Boiler Plant Project Number: M SECTION EARTH MOVING PART 1 - GENERAL 1.1 RELATED DOCUMENTS Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section. B. "Missouri Standard Specifications for Highway Construction, 2011," Missouri Highways and Transportation Commission. 1.2 SUMMARY Section Includes: 1. Excavating and filling for rough grading the Site. 2. Preparing subgrades for slabs-on-grade, walks, pavements, turf, grasses, and plants. 3. Excavating and backfilling for buildings and structures. 4. Excavating and backfilling trenches for utilities, tunnels and pits for buried utility structures. B. Related Sections: 1. Division 31 Section "Sediment and Erosion Control" for control of storm water on site and prevention of sediment leaving the site. 2. Division 31 Section "Site Clearing" for site stripping, grubbing and removal of aboveand below-grade improvements and utilities. 1.3 DEFINITIONS Backfill: Soil material or controlled low-strength material used to fill an excavation. 1. Initial Backfill: Backfill placed beside and over pipe in a trench, including haunches to support sides of pipe. 2. Final Backfill: Backfill placed over initial backfill to fill a trench. B. Base Course: Aggregate layer placed between the subbase course and hot-mix asphalt paving. C. Bedding Course: Aggregate layer placed over the excavated subgrade in a trench before laying pipe. D. Borrow Soil: Satisfactory soil imported from off-site for use as fill or backfill. E. Excavation: Removal of material encountered above subgrade elevations and to lines and dimensions indicated. EARTH MOVING

12 Guhleman and Hearnes Boiler Plant ProjectNumber: Ml Authorized Additional Excavation: Excavation below subgrade elevations or beyond indicated lines and dimensions as directed by Owner's Construction Representative. Authorized additional excavation and replacement material will be paid for according to Contract provisions for unit prices. 2. Unauthorized Excavation: Excavation below subgrade elevations or beyond indicated lines and dimensions without direction by Owner's Construction Representative. Unauthorized excavation, as well as remedial work directed by Owner's Construction Representative, shall be without additional compensation. F. Fill: Soil materials used to raise existing grades. G. Maximum Density: Maximum dry weight in pounds per cubic foot of a specific material, as determined by ASTM 0698, Standard Proctor Density. H. Optimum Moisture: Percentage of water at maximum density. I. Rock: Rock material in beds, ledges, unstratified masses, conglomerate deposits, and boulders of rock material that exceed l cu. yd. (0.76 cu. m) for bulk excavation or 3/4 cu. yd. (0.57 cu. m) for trench and pit excavation that cannot be removed by rock-excavating equipment, without systematic drilling, ram hammering, ripping or blasting, when permitted. J. Rubble: Buried concrete foundations, beams, walls, and other material. K. Structures: Buildings, footings, foundations, retaining walls, slabs, tanks, curbs, mechanical and electrical appurtenances, or other man-made stationary features constructed above or below the ground surface. L. Subbase Course: Aggregate layer placed between the subgrade and base course for hot-mix asphalt pavement, or aggregate layer placed between the subgrade and a cement concrete pavement or a cement concrete walk. M. Subgrade: Uppermost surface of an excavation or the top surface of a fill or backfill immediately below subbase or topsoil materials. N. Utilities: On-site underground pipes, conduits, ducts, and cables as well as underground services within buildings. 0. Sand: Class "A" River Fill Sand, for water and gas main bedding as indicated in drawings. 1.4 SUBMITT ALS Product Data: For each type of the following manufactured products required: 1. Controlled low-strength material, including design mixture. 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 earth-moving operations. Submit before earth moving begins. EARTH MOVING

13 Guhleman and Heames Boiler Plant Project Number: M QUALITY ASSURANCE Testing to be performed by Owner's Representative. 1.6 PROJECT CONDITIONS Traffic: Minimize interference with adjoining roads, streets, walks, and other adjacent occupied or used facilities during earth-moving operations. 1. Do not close or obstruct streets, walks, or other adjacent occupied or used facilities without permission from Owner's Construction Representative and authorities having jurisdiction. 2. Provide alternate routes around closed or obstructed traffic ways if required by Owner's Construction Representative or authorities having jurisdiction. B. Utility Locator Service: Notify "Missouri One Call" for area where Project is located before beginning earth moving operations. C. Do not commence earth-moving operations until erosion- and sedimentation-control measures specified in Section "Sediment and Erosion Control" and Section "Site Clearing" are in place. PART 2-PRODUCTS 2.1 SOIL MATERIALS B. General: Provide borrow soil materials when sufficient satisfactory soils are not available from excavation. Satisfactory Soils: Soil classification groups CL, GM, GW, GP, ML, SW, SP, SM, SC, and GC according to ASTM D 2488 or a combination thereof, free of rock or gravel larger than 4" in any dimension, debris, waste, frozen materials, vegetation and other deleterious matter. 1. Liquid Limit: Plasticity Index: 30. C. Satisfactory Soil within 36" of finish grade in turf and landscape areas shall be cohesive soils in soil classification groups ML, CL, CH or a combination thereof, free of rock or gravel larger than 1" in any dimension, debris, waste, frozen materials, vegetation and other deleterious matter. D. Unsatisfactory Soils: Soil Classification Groups OL, CH, MH, OH, and PT according to ASTM D 2488 or a combination of these groups. 1. Unsatisfactory soils also include satisfactory soils not maintained within 3 percent of optimum moisture content at time of compaction. 2. Unsatisfactory soils also include deleterious materials such as concrete, rock and masonry fragments larger than 4 inches (100 mm) in any dimension, organic material, wood, plastic, metal, tires, trash and other debris. EARTH MOVING

14 Guhleman and Hearnes Boiler Plant Project Number: M E. Sub base Material: Naturally or artificially graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sand meeting the requirements of MoDOT Type 1 Base Aggregate. F. Granular Trench Backfill: 1. Under Pipe: All backfill under the barrel of the pipe shall be free from debris, organic matter, and stones larger than one inch, and shall be tamped into place. Sand or stone crushed aggregate (95% passing a Yi" screen but not more than 10% passing a #200 sieve) are acceptable substitutes for soil. 2. Adjacent To and Top of Pipe: The first foot of backfill over the top of the pipe shall be "3/4" minus waste rock with fines" uncleaned crushed stone aggregate or suitable soil. Backfill shall be free of debris, brush, roots and stones or rubble more than one inch. 3. Under, Adjacent To, and top of Pipe in bedrock: Sand or fine rock (3/8" minus). This can be local creek run sand as approved by the Owner's Construction Representative. 4. Under Pavement: Full depth (1" minus) rock or crushed stone aggregate, or beginning one foot above pipe if in bedrock. G. Bedding Course: ASTM Naturally or artificially graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sand with 95 percent passing a Yi-inch sieve and not more than 10 percent passing a No. 200 sieve. H. Sand: Class "A" River Fill Sand. 2.2 CONTROLLED LOW-STRENGTH MATERIAL Controlled Low-Strength Material: Self-compacting, flowable concrete material produced from the following: 1. Portland Cement: ASTM C 150, Type I. 2. Normal-Weight Aggregate: ASTM C 33, 3/4-inch nominal maximum aggregate size. 3. Water: ASTM C 94/C 94M. 4. Air-Entraining Admixture: ASTM C 260. B. Produce conventional-weight, controlled low-strength material with 140-psi compressive strength when tested according to ASTM C 495. PART 3 - EXECUTION 3.1 PREPARATION Protect structures, utilities, sidewalks, pavements, and other facilities from damage caused by settlement, lateral movement, undermining, washout, and other hazards created by earth-moving operations. B. Protect and maintain erosion and sedimentation controls during earth-moving operations. C. Protect subgrades and foundation soils from freezing temperatures and frost. Remove temporary protection before placing subsequent materials. EARTH MOVING

15 Guhleman and Hearnes Boiler Plant Project Number: M141 l SAFETY The means of the work and the safety of the Contractor's employees are solely the responsibility of the Contractor. The Contractor has a contractual obligation to comply with all applicable laws and regulations including those of OSH At no time will either the Owner or Owner's Constrnction Representative take responsibility for either the means of the work or the safety of the Contractor's employees. 3.3 DEWATERING B. Prevent surface water and ground water from entering excavations, from ponding on prepared subgrades, and from flooding Project site and surrounding area. Protect subgrades from softening, undermining, washout, and damage by rain or water accumulation. 1. Reroute surface water rnnoff away from excavated areas. Do not allow water to accumulate in excavations. Do not use excavated trenches as temporary drainage ditches. 3.4 EXPLOSIVES Explosives: Explosives are not authorized for this Project. 3.5 EXCAVATION, GENERAL Unclassified Excavation: Excavate to subgrade elevations regardless of the character of surface and subsurface conditions encountered. Unclassified excavated materials may include concrete, masonry, rock, soil materials, debris, organic materials and obstructions. No changes in the Contract Sum or the Contract Time will be authorized for concrete, masonry, rock excavation or removal of any debris, organic materials or obstructions. 1. If excavated materials intended for fill and backfill include unsatisfactory soil materials, concrete, masonry and rock, replace with satisfactory soil materials. 2. No material larger than 2 inches (50 mm) in any dimension shall be used as fill material onsite for backfilling of excavations from depths of O to 4 feet (0 to 1.25 m) below proposed subgrade. B. Machine slope banks, to angle of repose or less, until shored. Excavations should be made in accordance with OSHA regulations. 3.6 EXCAVATION FOR STRUCTURES Excavate to indicated elevatiqns and dimensions within a tolerance of plus or minus 1 inch (25 mm). If applicable, extend excavations a sufficient distance from structures for placing and removing concrete formwork, for installing services and other construction, and for inspections. EARTH MOVING

16 Guhleman and Hearnes Boiler Plant Project Number: Ml Excavation for Underground Utility Structures: Excavate to elevations and dimensions indicated within a tolerance of plus or minus 1 inch (25 mm). Do not disturb bottom of excavations intended as bearing surfaces. 3.7 EXCAVATION FOR UTILITY TRENCHES Excavate trenches to indicated gradients, lines, depths, and elevations. B. Excavate trenches to uniform widths to provide the following clearance on each side of pipe or conduit. Excavate trench walls vertically from trench bottom to 12 inches (300 mm) higher than top of pipe or conduit unless otherwise indicated. 1. Clearance: 6 inches (300 mm) each side of pipe ot conduit unless otherwise indicated. C. Trench Bottoms: Excavate and shape trench bottoms to provide uniform bearing and support of pipes. Shape subgrade to provide continuous support for bells, joints, and barrels of pipes. Remove projecting stones and sharp objects along trench subgrade. 1. Excavate trenches 6 inches (150 mm) deeper than elevation required in rock or other unyielding bearing material to allow for bedding course. 3.8 SUBGRADE INSPECTION B. c. Notify Owner's Construction Representative when excavations have reached required subgrade. If Owner's Construction Representative determines that unsatisfactory soil is present, continue excavation and replace with compacted backfill or fill material as directed. Reconstruct subgrades damaged by freezing temperatures, frost, rain, accumulated water, or construction activities, as directed by Owner's Construction Representative, without additional compensation. 3.9 UNAUTHORIZED EXCAVATION Fill unauthorized excavation with satisfactory soils as directed by Owner's Construction Representative STORAGE OF SOIL MATERIALS Stockpile borrow soil materials and excavated satisfactory soil materials without intermixing, unless otherwise indicated by the Owner's Construction Representative. 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. EARTH MOVING

17 Guhleman and Hearnes Boiler Plant Project Number: M BACKFILL Place and compact backfill in excavations promptly, but not before completing the following: 1. Construction below finish grade. 2. Surveying locations of underground utilities for Record Documents. 3. Testing and inspecting underground utilities. 4. Removing concrete formwork. 5. Removing trash and debris. 6. Removing temporary shoring and bracing, and sheeting. B. Place backfill on subgrades free of mud, frost, snow, or ice UTILITY TRENCH BACKFILL Place backfill on subgrades free of mud, frost, snow, or ice. B. Place and compact bedding course on trench bottoms and where indicated. Shape bedding course to provide continuous support for bells, joints, and barrels of pipes and for joints, fittings, and bodies of conduits. C. Backfill voids with satisfactory soil while removing shoring and bracing. D. Place and compact initial backfill of bedding course, free of particles larger than 1 inch (25 mm) in any dimension, to a height of 6 inches (150 mm) over the pipe. 1. Carefully compact initial backfill under pipe haunches and compact evenly up on both sides and along the full length of piping to avoid damage or displacement of piping. Coordinate backfilling with utilities testing. E. Place and compact final backfill of satisfactory soil to final subgrade elevation SOIL FILL Plow, scarify, bench, or break up sloped surfaces steeper than 1 vertical to 4 horizontal so fill material will bond with existing material. B. Place and compact fill material in layers to required elevations as follows: 1. Under grass and planted areas, use satisfactory soil material. 2. Under walks and pavements, use satisfactory soil material. 3. Under building slabs, use satisfactory soil material. C. Place soil fill on subgrades free of mud, frost, snow, or ice SOIL MOISTURE CONTROL Uniformly moisten or aerate subgrade and each subsequent fill or backfill soil layer before compaction to within 3 percent of optimum moisture content. EARTH MOVING

18 Guhleman and Hearnes Boiler Plant Project Number: Ml Do not place backfill or fill soil material on surfaces that are muddy, frozen, or contain frost or ice. 2. Remove and replace, or scarify and air dry, otherwise satisfactory soil material that exceeds optimum moisture content by 3 percent and is too wet to compact to specified compaction requirements COMPACTION OF SOIL BACKFILLS AND FILLS Place backfill and fill soil materials in layers not more than 8 inches (200 mm) in loose depth for material compacted by heavy compaction equipment and not more than 5 inches (125 mm) in loose depth for material compacted by hand-operated tampers. B. Place backfill and fill soil materials along the full length of each building pad. C. Compact soil materials to not less than the following percentages of maximum dry unit weight according to ASTM D 698: r 1. Building pads and pavement areas and five feet beyond: compact each layer of backfill or fill soil material at 95 percent. 2. Utility trenches away from building pads and pavement areas: compact each layer of initial and final backfill soil material at 90 percent. 3. All other areas: compact each layer of backfill or fill soil material at 90 percent GRADING General: Uniformly grade areas to a smooth surface, free of irregular surface changes. Comply with compaction requirements and grade to cross sections, lines, and elevations indicated. 1. Provide a smooth transition between adjacent existing grades and new grades. 2. Cut out soft spots, fill low spots, and trim high spots to comply with required surface tolerances. 3. Fill all holes and voids as a result of demolition tasks with suitable backfill material to pre-demolition ground elevation, unless otherwise specified. Modify surface as necessary to provide positive drainage. B. Site Rough Grading: Slope grades to direct water away from buildings and to prevent ponding. Finish subgrades to elevations required to achieve indicated finish elevations, within the following subgrade tolerances: 1. Building Pads and Parking Lots: Plus or minus 1/2.inch (13 mm). 2. All Other Areas: Plus or minus 1 inch (25 mm). C. Grading inside Building Lines: Finish subgrade to a tolerance of 1/2 inch (13 mm) when tested with a 10-foot (3-m) straightedge SUBBASE AND BASE COURSES UNDER PAVEMENTS AND WALKS Place subbase course and base course on subgrades free of mud, frost, snow, or ice. EARTH MOVING

19 Guhleman and Hearnes Boiler Plant Project Number: M B. On prepared subgrade, place subbase course and base course under pavements and walks as follows: 1. Place base course material over subbase course under hot-mix asphalt pavement. 2. Shape subbase course and base course to required crown elevations and cross-slope grades. 3. Place subbase course and base course 6 inches or less in compacted thickness in a single layer. 4. Place subbase course and base course that exceeds 6 inches in compacted thickness in layers of equal thickness, with no compacted layer more than 6 inches thick or less than 3 inches thick. 5. Compact subbase course and base course at optimum moisture content to required grades, lines, cross sections, and thickness to not less than 95 percent of maximum dry unit weight according to ASTM D B. c. FIELD QUALITY CONTROL All bearing soil and backfill will be inspected and tested and at the discretion of the Owner's Construction Representative. Owner will retain the services of an engineering inspection and testing firm. Contractor will be responsible for coordinating and scheduling inspections. Allow testing agency to inspect and test subgrades and each fill or backfill layer. Proceed with subsequent earth moving only after test results for previously completed work comply with requirements. Testing agency will test compaction of soils in place according to ASTM D 1556, ASTM D 2167, ASTM D 2922, and ASTM D 2937, as applicable. Tests will be performed at the following locations and frequencies: 1. Building Pad Areas: At subgrade and at each compacted fill and backfill layer, at least one test for every 2,500 sq. ft. or less of building pad, but in no case fewer than three tests. 2. Trench Backfill: At each compacted initial and final backfill layer, at least one test for every 200 feet or less of trench length, but no fewer than two tests. D. When testing agency reports that subgrades, fills, or backfills have not achieved degree of compaction specified, scarify and moisten or aerate, or remove and replace soil materials to depth required; recompact and retest until specified compaction is obtained B. PROTECTION Protecting Graded Areas: Protect newly graded areas from traffic, freezing, and erosion. Keep free of trash and debris. 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. EARTH MOVING

20 Guhleman and Hearnes Boiler Plant Project Number: Ml Scarify or remove and replace soil material to depth as directed by Owner's Construction Representative; reshape and re-compact. C. Where settling occurs before Project correction period elapses, remove finished surfacing, backfill with additional soil material, compact, and reconstruct surfacing DISPOSAL OF SURPLUS AND WASTE MATERIALS Transport surplus satisfactory soil to designated storage areas on Owner's property. Stockpile or spread soil as directed by Owner's Construction Representative. 1. Remove waste materials, including unsatisfactory soil, trash, and debris, and legally dispose of them off Owner's property. END OF SECTION EARTH MOVING