MONTROSE COUNTY 2017 ASPHALT OVERLAY PROJECT SPECIFICATIONS

Transcription

1 SECTION 1 General Requirements: MONTROSE COUNTY 2017 ASPHALT OVERLAY PROJECT SPECIFICATIONS 1.1 Montrose County Specifications: All work performed on this project shall be performed in conformance with these plans, Montrose County Standards and Specifications for Roads and Bridges (latest edition), supported by CDOT Standard Specifications for Road & Bridge Construction (latest edition). In the event of conflict between specifications, the more rigorous requirement will apply. 1.2 Safety Requirements: The Contractor shall have full and complete responsibility for jobsite safety and shall perform all work in full conformance with all Federal, State, and local safety regulations. 1.3 Contractor Investigation: The Contractor shall familiarize itself with local conditions and the specifications of Montrose County, shall examine the site, make such tests, and perform such explorations as Contractor deems necessary to evaluate all conditions on site, in order to perform the work in accordance with the Contract Documents for the Contract Price within the Contract Time. Contractor shall immediately advise Owner of any errors in the plans. 1.4 Trained & Experienced Personnel: Contractor shall staff the project with personnel, supervisors, and quality control technicians who are experienced and properly trained in the methods and equipment required to accomplish this work. Contractor s paving supervisor shall be on site at all times when paving is in progress to monitor and manage the work. Project supervision is a full time job: the supervisor shall not routinely operate equipment. Contractor s Quality Control technician shall be physically present each day to test density and sample the HMA to verify that the work conforms to project specifications. In the event that any mission critical personnel are not present on the project, the Owner s Representative may direct that work shall cease until Contractor has a full crew available to perform the work. 1.5 Underground Utility Locates: The Contractor shall have full responsibility to identify, locate, protect, and repair if damaged, all existing utility lines. Contractor shall contact the Utility Notification Center of Colorado, 811, and the individual tier II utility companies as needed, to locate existing underground utilities prior to construction. Utilities shown on the drawings are based upon information provided by other organizations, and may not be entirely accurate nor complete. Contractor shall field verify all existing utility locations and depths prior to initiating construction. 1.6 Hazardous Materials: In the event that the Contractor encounters any hazardous materials on the site (including but not limited to asbestos cement pipe), Contractor shall leave such materials undisturbed and shall contact the Owner for directions regarding disposal of said materials. 1.7 Start of Work:

2 Owner shall issue a Notice to Proceed to Contractor after execution of the Contract and receipt of required submittals and certificates of insurance from Contractor. Contractor shall notify the Owner at least 48 hours prior to commencing construction to arrange for inspection(s). 1.8 Payment for Extra Work: A Change Order signed by the Owner is required to qualify any extra work for extra payment. Any extra work undertaken or performed by the Contractor prior to having a Change Order signed by the Owner shall be deemed to have been undertaken for the Contractor's convenience and shall not be eligible for extra compensation. 1.9 Record Drawings: Contractor shall record all variations from the design that occur during construction on "as-built" drawings showing locations and dimensions sufficient to document changes, and shall provide such mark ups to the Owner upon completion of the project Pre-Construction Submittals: Contractor shall submit the following information prior to mobilization for the work: a. HMAC Mix Design b. Qualifications of the materials testing laboratory that prepared the mix design c. Qualifications of the personnel providing Field Quality Control during paving operations d. Contractor's Internal Quality Control Plan e. Oil supplier's name & location of refinery f. Location of aggregate source and asphalt hot plant g. Proposed herbicides and sterilants h. Superintendent's name & qualifications i. Proposed Schedule j. Traffic control plan 1.11 Construction Surveying: Owner may set reference stakes at regular intervals to aid in locating repairs and tracking material usage Pre Construction Conference: Contractor shall schedule a pre construction conference on site with Contractor's Project Manager and Project Superintendent, the Montrose County Engineer, the Owner's Representative, and the County Road Superintendent to clarify project requirements, confirm traffic control details, coordinate materials testing, and establish lines of communication Traffic Control: The Contractor shall prepare and submit a traffic control plan to the County for review & approval at least 10 days prior commencement of work. Contractor shall furnish, install, and maintain all signs, barricades, and lights required under the County approved traffic control plan, and shall provide trained traffic control personnel to control access to the area when work is in progress. The traffic control plan shall be prepared in accordance with section 6.18 of the Montrose County Standards and Specifications for Roads and Bridges, the CDOT Model Traffic Code, and the USDOT Manual on Uniform Traffic Control Devices. Flaggers shall be CDOT certified. Roads shall not be closed except for short durations of 10 minutes or less. Such closures shall be kept to an absolute minimum Local Access:

3 To the greatest extent practical Contractor shall maintain access to individual residences during all construction activities. Prior to commencement of work, Contractor shall provide hand delivered written notice to all businesses and residences that access directly onto these streets, advising them of planned construction and associated traffic control plans. This notice shall alert local residents and businesses of the need to keep traffic off of tack oil and fresh asphalt pavement for at least an hour after placement to allow it to cool sufficiently to accommodate personal automobiles, and 4 hours to accommodate trucks. Contractor shall request residents' cooperation. Daily Notice: Contractor shall hand deliver notice each day to those residences expected to be inconvenienced by the next day's work, advising them that their driveways will be closed during paving operations. The notice shall again request cooperation. Contractor shall designate a person to answer calls from concerned residents, and shall provide the phone number for that person on the notice to residents. Where necessary to provide prompt vehicular access, Contractor may cool a fresh mat by watering the surface after passing density tests have been obtained at that location, if approved by the Owner s Representative. Montrose County will set up its portable message board one week in advance of paving operation advising citizens to expect half day closures of driveways during paving operations Project Documentation: Contractor shall weigh all hot mix asphaltic concrete (HMAC), Base Course Gravel (BCG), except owner supplied shouldering material, used on this project on certified scales, and shall deliver copies of all weight tickets to the Owner's Representative each day. Contractor shall measure and record pavement repair areas and quantities as the work progresses, and shall deliver copies of the record to the Owner's Representative each day. Contractor shall deliver Certificates of Compliance for all Liquid Asphalt Binder used to make HMAC for this project to the Owner's Representative with each day's weight tickets. Contractor shall deliver copies of Contractor's internal quality control test results to the Owner's Representative upon request. Owner will provide before and after stockpile surveys of Owner furnished shouldering gravel for the purpose of determining pay quantities of said material. Contractor may, at Contractor s option, also survey the stockpiles. In the event of significant discrepancy between measurements by Owner and Contractor, an independent licensed surveyor acceptable to both parties will be retained to measure before and after stockpiles. The parties agree to accept the measurements provided by the licensed surveyor. Cost of the independent surveyor will be shared equally between the Owner and Contractor. SECTION 2 Technical Requirements 2.1 Contractor's Scope of Work: Contractor shall construct a Hot Mix Asphaltic Concrete (HMAC) overlay as directed by the Owner at the following locations: Site #1 Spring Creek Road between 6000 and 6175 Roads (1.75 miles, 3 overlay, two lifts) Site # Rd between Oak Grove and Spring Creek Roads (1.0 miles, 3 overlay, two lifts) Site #3 Maple Grove Road between 5875 and 6000 Roads (1.25 miles, 3 overlay, two lifts) Site #4 Banner Road between 5400 and 5500 Roads (1.0 miles, 3 overlay, two lifts) Site # Road north of Hwy 145 approximately 3 miles northwest of Norwood) (0.96 miles, 3 overlay, two lifts)

4 Pavement milling for transitions will be required where new overlays join existing pavement, or as directed by the Owner. Contractor shall load, haul, place, and compact Owner-supplied shouldering gravel, as directed by the Owner. Equipment operators working in County gravel pits shall have current MSHA training, and will be provided site specific training by the Owner. Any and all additional work, if authorized by Owner, shall comply with these specifications and all other contract documents. 2.2 Public Access: Contractor shall maintain continuous public access through the work area. Single lane traffic with flagger control shall be provided during working hours. Access to adjacent properties shall be coordinated with individual property owners when paving operations are scheduled for that segment of roadway. 2.3 HMAC Mix Design: The Hot Mix Asphalt (HMA) mixture shall be a Superpave Mix Design prepared in conformance with CDOT Procedure 52 by a qualified materials testing laboratory acceptable to the Owner. A mix design currently in use on CDOT work in this area, at similar elevations, is requested and preferred. Contractor shall submit the mix design to the Owner for review at least 10 days prior to paving. The Mix Design shall include, at a minimum, all items identified in section 5.28 of Montrose County Standards and Specifications for Roads and Bridges, latest edition. Superpave Mixture Properties shall conform to values presented in Section 5.30, Hot Mix Asphalt Mixture Composition, Superpave Mixture Properties, for Minor Arterials, Montrose County Standards, unless otherwise approved by the County Engineer. DEVIATIONS BETWEEN THE LAB MIX DESIGN AND THE FIELD PLACED MATERIAL SHALL NOT EXCEED TOLERANCES SPECIFIED IN THE APRROVED MIX DESIGN UNLESS APPROVED IN WRITING BY THE COUNTY ENGINEER. Contractor shall provide Owner with information describing the qualifications of the laboratory preparing the HMAC mix design. 2.4 Asphalt Cement: The asphalt cement shall be PG unless otherwise approved by the County Engineer. 2.5 Aggregate Properties: Aggregate for hot mix asphalt shall conform to Montrose County Standards and Specifications, including: Gradation: CDOT Grading SX, conforming to CDOT Table Hardness: L.A. Abrasion Test, % Loss: 45% Maximum at 500 revolutions (AASHTO T-96). Coarse Aggregate Fractured Faces (2 or more): 80% minimum of aggregate retained on the #4 sieve (ASTM D-5821). Fine Aggregate Angularity (Method A): 45 Min (AASHTO T-304 or CP-L5113). Sand Equivalent Value (Referee Method): 45 Min (AASHTO T-176) Flat and Elongated Pieces: 10% maximum (AASHTO M283) Sodium Sulfate Soundness: 12% max, combined coarse & fine (AASHTO T 104) Adherent Coating (Dry Sieve): 0.5% retained on #4 sieve, 45% min passing #4 (AASHTO T 176) Plasticity Index: Non Plastic (AASHTO T-89) 2.6 HMAC Production Mix Temperatures and Tolerances: The production mix shall conform to the tolerances specified in Table 401-1, Tolerances for Hot Mix Asphalt, CDOT Standards and Specifications for Road & Bridge Construction, current edition, and in

5 Montrose County Standards, Section 5.30, in the table titled "HMA Mixture Design Verification Tolerances." HMAC shall be batched and delivered to the site at temperatures conforming to CDOT Table Warm Mix Additive Contractor s HMA Mix Design may utilize warm mix additives, such as Evotherm 3G or an approved equivalent, at Contractor s option. In that event, the Mix Design shall specify temperatures for batching, placement, and compaction of the Warm Mix. 2.8 Contractor Furnished Materials: Contractor shall furnish all materials necessary to construct the project, with the exception of Owner furnished gravel shouldering material. 2.9 Owner Furnished Shouldering Gravel: Owner shall furnish shoulder gravel at Owner s gravel pits located in best proximity to each element of the work. Contractor shall moisture condition shoulder gravel at the source, prior to loading, and shall load, haul, place, and compact shoulder gravel materials. Contractor shall supply water and water truck for moisture conditioning the gravel at the source Tack Coat: Tack coat shall be placed on all asphalt to asphalt contact surfaces, including edges of patches. Tack coat material shall be emulsified asphalt conforming to AASHTO M 140 or M 208. Tack coat will not normally be required between bottom and top lifts of two lift pavements, provided the surface mat is placed promptly after placement of the leveling course. The Owner s Representative will decide whether intermediate tack coat is needed between lifts. Payment Detail: Contractor shall be paid for Tack Coat by the undiluted gallon of material used, based on the daily readings of the calibrated distributor meter, as documented in writing daily by the paving supervisor and delivered to the Owner s Representative. Owner will only pay for those quantities of tack coat that Contractor has properly documented each day. The application rate shall be as approved by the Owner. Where a two lift process is employed, Contractor shall be paid for both tack coats Finished Surface, Crown, HMAC Mat Thickness: The Contractor shall construct a uniform smooth riding surface, a nominal mat thickness at each work location as described in these plans, smooth transitions to join existing pavement, and uniform radii of curvature in the curves for the new pavement. Contractor shall center pavement on the center of the existing roadway, and shall generally match the existing road profile, unless otherwise directed by the Owner. Longitudinal joints shall be offset from underlying longitudinal joints in conformance with CDOT The existing surface and crown of County roadways are somewhat irregular. The Contractor shall implement best construction practices to achieve a smooth riding surface and a 2% to 4% crown. Three inch (3 ) thick overlays shall be constructed in two lifts, consisting of an initial leveling course nominally 1 thick, and a surface course, nominally 2 thick, with each lift being placed utilizing a laydown machine equipped with an automatically controlled screed that averages out variations in the underlying surface over a longitudinal distance of not less than 30 lf. Minor variations in final mat thickness are acceptable as part of an effort to average out high and low spots.

6 2.12 Smoothness Smoothness of the finished pavement may be measured by the Owner, at Owner s expense and discretion, in conformance with CDOT (a) 1, HRI Category I. Corrective work may be required if HRI exceeds 90 inches / mile, or if localized roughness exceeds 135 inches / mile when measured on 0.1 mile increments Yield Contractor shall monitor the HMAC yield (tons/100 If) regularly as the work progresses to verify the finished product averages the design thickness. Unauthorized material overages will be at the Contractor s expense Weed Control: Contractor shall apply bare ground herbicide and soil sterilant to all shoulder areas prior to placement of gravel shouldering material. At least two weeks prior to spraying, Contractor shall submit to Owner the applicator s name and license number, the chemical type, generic and trade name, mix rate, application rate, and application method. Applicator shall be a Colorado licensed chemical applicator Pavement Repairs: If areas of damaged or failing asphalt pavement are encountered on the project, the Contractor shall cut out and remove damaged asphalt, and excavate unsuitable material to a depth determined by the Owner's Representative, based upon evaluation of existing conditions. Contractor shall grade and compact the underlying surface as directed by the Owner s Representative, and shall place moisture conditioned Class 6 aggregate in lifts not exceeding 6 in thickness, compacted to at least 95% modified proctor density, ASTM D-1557, up to 3 below the surface of the existing asphalt. Contractor shall apply tack coat to the edges of the patching area, and shall place and compact HMAC patching material in lifts not exceeding 3" thick. Contractor shall compact the HMAC patch to 94% +/- 2% maximum theoretical density. The completed repair shall match the surface of the existing pavement. Contractor shall remove waste pavement and gravel from the site and dispose in a legal manner. Payment Detail: Contractor will be paid for repair work based on the volume of material removed, the weight of Class 6 base course and HMAC placed back into the excavated area. Asphalt removal, grading, moisture conditioning, hauling, disposal, compaction, and edge tack coat are considered incidental to this work and will not be paid separately HMAC Placement and Compaction: The Contractor s laydown machine shall be equipped with automatic screed controls (ski type device at least 30 feet in length per CDOT , or Owner approved equal) to average out irregularities in the existing surfaces. Contractor s compaction equipment shall include steel drum vibratory breakdown and finish rollers, and a pneumatic tire roller to be used during placement of the initial HMAC leveling course. Additional use of the pneumatic tire roller may be required elsewhere on the project, if directed by the Owner. HMAC pavement shall be finished to provide a uniform smooth surface, and shall be compacted to 94% +/- 2% of maximum theoretical density. Compaction shall be completed before temperature of the mat falls below 185 F.

7 2.17 Two Lift Paving Process: A principal objective of this project is to improve the smoothness of these roads. Where the Contract prescribes overall pavement thickness of 3, the Contractor shall place HMAC in two lifts, consisting of a 1 thick nominal leveling course followed by a 2 thick nominal surface course. Contractor shall utilize a laydown machine equipped with sensors and automatic screed controls to average out elevation variations in the underlying surface, on both lifts. Contractors are invited to propose methods and equipment to meet this objective, to be considered by the Owner when deciding which firm shall be awarded the work. Owner's evaluation of paving methods proposed by bidders may come down to a judgment call, considering cost and anticipated results when evaluating competing proposals which may or may not be directly comparable. Owner reserves the right to award the work on considerations other than lowest cost. Payment Detail: Contractor shall be paid for HMAC pavement by the ton of HMAC delivered and compacted in place, upon acceptance by the Owner. The quantity of HMAC material used on the project shall be documented by individual weigh tickets accompanying each load of material delivered to the project Weather Limitations: Paving operations shall be suspended during rain, when rain is imminent, or when the existing pavement surface is wet. Loads of hot mix asphalt shall be tightly covered whenever rain threatens or is falling. A load shall be discarded if the temperature of the load falls below CDOT placement minimums because of rain, placement delays, or other adverse weather. Contractor is responsible to manage and schedule its work in accordance with limitations imposed by weather, and shall not be compensated for HMA discarded due to adverse weather or other conditions Contractor's Quality Control The Contractor shall provide quality control testing to ensure its work conforms to project specifications. Contractor shall provide a full time Quality Control technician to measure field density during paving operations, and to obtain samples for laboratory testing. Paving work may commence only when the Contractor s Quality Control technician is physically on site. Contractor s Quality Control technician shall regularly communicate density measurement results to the operators of the compaction equipment as the work progresses, and shall be authorized and directed to adjust the roller pattern as needed to ensure the new pavement is compacted to 94% +/- 2% of maximum theoretical density. Contractor s Quality Control program shall include tests each day to verify that oil content and gradation of the HMAC are within tolerances. Contractor s Quality Control program shall include measuring maximum theoretical density each day. Sampling and testing frequencies shall conform to Montrose County Road & Bridge Specifications. Contractor s Quality Control program shall be structured to ensure that each day s quality control data is available to Contractor s field supervisor and to the Owner s Representative no later than close of business on the subsequent work day. The Owner reserves the right to order asphalt placement to pause, or cease, at any time when measured density behind the breakdown roller is less than 91%. Owner reserves the right to order asphalt placement to cease, or slow down, at any time when the breakdown roller is not working immediately behind the laydown machine.

8 Owner reserves the right to order asphalt placement to cease at any time when compaction equipment is not manned and operating. Owner reserves the right to order work to cease at any time when the paving supervisor is not on site, or is not monitoring and managing the work. The costs of Contractor's quality control work shall be included in the unit cost of HMAC paving Owner's Quality Assurance and Materials Testing: Owner will engage and pay a qualified materials testing laboratory to monitor Contractor's Work for Owner's convenience and information. The Owner will test density, gradation, fractured face, and oil content as the Owner deems necessary to verify that the work meets the specifications. Retesting of any failed section will be provided at the Contractor's expense. Acceptance of the work shall be based upon Owner's testing. Contractor shall notify the Engineer at least three working days in advance of paving in order to schedule testing. Initial density testing will be on 100' intervals in alternate lanes. Testing frequency may be adjusted depending upon reliability and consistency of results. Gradation, fractured face, and oil content tests will be performed daily. Tests performed each day will be deemed representative of the day's work Joints to Existing Pavement: Contractor shall mill all joints with existing asphalt pavement to create smooth riding joints. Transition lengths may be field adjusted to accommodate existing conditions. Wherever the new overlay terminates and joins an existing chip seal surface, a tapered overlay will be utilized in lieu of a milled joint. Payment Detail: Contractor shall be paid for each square yard of asphalt milled, regardless of depth, measured and accepted by the Owner Field Approaches: Contractor shall pave a two foot wide by 3" thick HMAC apron at each agricultural field approach, and shall place, shape, and compact sufficient gravel shouldering material to provide a smooth transition from the edge of pavement to the adjacent field approach. Payment Detail: Contractor shall be paid for approach paving by the ton of HMAC under the HMAC Pavement Item, and for gravel approaches by the cubic yard under the Shoulder Gravel Item Residential Driveways: Gravel Surfaced Driveways: Contractor shall pave a two foot wide by 3 thick HMAC apron at each gravel driveway, and shall place, shape, and compact sufficient shouldering material to provide a smooth transition from the edge of pavement to the adjacent driveway. Driveway throat widths shall be 16 where possible, or as directed by the Owner s Representative. Asphalt Paved Driveways: Where existing asphalt is in good condition, Contractor shall mill existing asphalt aprons 1-1/2 deep and transverse to the direction of travel and shall place HMAC up to the milled edge. The limits of the milled asphalt shall be determined by the Owner s Representative and Contractor on a case by case basis. Where driveway asphalt is in poor condition and cannot be milled, the Contractor shall construct a tapered the asphalt overlay onto the driveway, when directed by the Owner s Representative. Payment Detail: Contractor shall be paid for driveway paving by the ton of HMAC under the HMAC Pavement Item, for milling by the square yard of milling under the Milling Item, and by the cubic yard of shoulder gravel under the Gravel Shouldering Item.

9 2.24 Mail Box Turnouts: Contractor shall pave a two foot wide by 3" thick HMAC apron approximately 45 long, centered on each mail box, and shall place, shape, and compact sufficient shouldering material to provide a smooth transition from the edge of pavement to adjoining existing ground surface. Payment Detail: Contractor shall be paid for mail box turnout paving by the ton of HMAC under the HMAC Pavement Item, and by the cubic yard of shoulder gravel under the Gravel Shouldering Item Manhole Covers and Valve Boxes: Contractor shall install riser rings on manhole covers and valve boxes encountered in the paved area. The dimension of the riser shall be selected to set each lid ½ to ¾ below the finished paved surface to protect it from snowplows. Payment Detail: Contractor shall be paid for adjusting manhole lids and valve boxes under the Raise Manhole Lid and Raise Valve Box Cover pay items for each unit completed Intersecting County Roads: Contractor shall pave intersecting County gravel roads for a distance of forty feet (40') from the edge of pavement of the primary roadway, matching width and corner radii of the existing secondary road, or as otherwise directed by the Owner s Representative. Contractor shall furnish, deliver, place, and compact County furnished gravel to provide a smooth transition from the existing surface to the new pavement. Contractor's responsibility for graveling will generally be limited to the last 20' of the gravel road approaching the new pavement. Contractor shall mill joints and pave intersections with paved County roads as directed by the Owner s Representative. Payment Detail: Contractor shall be paid for paving road intersections by the ton of HMAC under the HMAC Pavement Item, and shall be paid for graveling transitions to new pavement by the cubic yard of gravel used thereon, under the Owner Supplied Gravel Item Gravel Shoulders: Contractor shall moisture condition, load, haul, place, shape, and compact Owner-supplied gravel for road shoulders. Shoulder gravel will be available from the following Montrose County gravel pits: LaSalle Rd. Pit located approx. 1.5 miles west of Hwy 50; Neal Pit located 2.5 miles west of Olathe, or the Nucla Pit located adjacent the Nucla Airport. Contractor shall moisture condition shouldering gravel at the source prior to loading. Contractor shall provide water necessary for moisture conditioning. Water is generally not available in County gravel pits. Equipment operators employed by Contractor who work in County gravel pits shall have current MSHA training, and shall be provided with site specific MSHA training by the Owner. Shouldering material shall be placed and compacted to a level approximately one inch (1 ) above the top edge of the new pavement surface by 24 to 36 wide, and then shall be struck off with a blade flush with the surface of pavement and matching the slope of the adjacent paved surface, or as directed by the Owner. Shouldering material shall be compacted to at least 90% modified Proctor density. Shoulder gravel shall be placed using equipment designed for that purpose. Dumping gravel on the new pavement and blading it off the edge is prohibited. Contractor shall take all necessary measures to avoid damaging the new pavement surface during placement of shoulder gravel.

10 Payment Detail: Contractor shall be paid for shouldering by the cubic yard under the Shoulder Gravel Item. Quantity will be measured by before and after surveys of the stockpile by the Owner Paint Striping: Contractor shall paint centerline and edge stripes on the new road surface in conformance with Montrose County Standards. Contractor shall coordinate painting details with the Owner, and exactly replicate the existing striping configurations, unless otherwise directed by the Owner. The Contractor shall document the existing striping configuration and submit this striping log to the Owner prior to commencement of paving work. Technical Specifications: Paint Type: Fast dry traffic paint Environmental Statement: Product shall contain no lead, chrome, or other heavy or toxic metals, and complies with EPA S Federal Clean Air Act Amendment of Paint Specifications: Made to meet performance standards of Federal Specifications TT-P-1952D T Type II Wet Film: wet film per coat: 15 Mils. Coverage: coverage shall comply with manufacturer rate of linear feet of four inch strip yield per gallon of paint at 15 mils wet. (Ex. 320 lineal ft / gallon at 15 mil or 100 sq ft / gallon at 15 mils) Limitations: Do not apply when air, surface or product temperature is below 50 degrees F. Application above 70 degrees F ambient is ideal for quicker drying times. Reflective Beads: Traffic Marking Beads must meet AASHTO M247 Type I or Type II non floatation or Federal Specification TT-B-1325C Type I. Beads shall be applied at a minimum rate of 6 pounds per gallon of paint. Bead dispensers shall be calibrated at the beginning of the project to proper flow rate and monitored throughout the course of painting to ensure proper bead coverage. Contractor will broom sweep all roadways before striping to assure bonding of paint to pavement. Application shall produce an even and uniform film thickness at the required coverage and shall apply markings of uniform cross sections and distinct edges without running, splattering, hour glassing; and without over spray. A wind screen, shroud, or other form of mitigation should be used to prevent displacement of materials by wind. Paint shall not be thinned unless directed by the Owner. Proper bead adherence and paint cross sections are to be maintained or all marking operations shall cease until corrections are made. It is the contractor s responsibility to maintain quality assurance throughout the painting process. Day time visual inspections by a county representative may be conducted on a daily basis to verify quality control. Night time inspections will be conducted on a periodic basis by a county representative accompanied by a contractor representative to assure proper bead and paint application. The first night inspection shall be conducted upon completion of the first day of painting so any issues or adjustments can be dealt with in a timely manner. Defective workmanship or materials shall be corrected at the expense of the contractor when discovered, and prior to continuing work. Contractor will be required to grind out stripe errors instead of using black out paint unless grinding would leave an obvious grooved surface, or as directed by the Owner. Payment Detail: Contractor shall be paid for striping by the lineal foot of striping placed under the Paint Striping Item Cleanup: Contractor shall clean up and remove all debris from the work area upon completion of Contractor's work.

11 2.30 Spot Testing Limitation: The results of Owner's spot testing, spot materials sampling, spot field measurements, and spot observations by the Owner, the Engineer, or their agents, performed for the Owner's benefit, do not relieve the Contractor of the responsibility to construct all of the Work in full conformance with the Contract Documents.