Section 02510 - Water Distribution.doc

SECTION 02510

water distribution part 1 - GENERAL

1.1 SUMMARY

A. This Section includes piping and appurtenances for potable-water service outside the buildings. This Section also includes flushing, testing, and disinfecting waterlines.

1.2 SUBMITTALS

A. Product Data for the following:

1. PVC Pipe and fittings

2. Compression couplings for similar and dissimilar pipes

3. Gate Valve and Box

4. Operating Tools For Curb Stop, Gate Valve & Meter Can Lids

SPEC WRITER: DELETE WATER METERS BELOW IF PROVIDED BY UTILITY COMPANY.

5. Backflow preventers and assemblies.

SPEC writer: ADD MORE SUBMITTAL REQUIREMENTS FOR ITEMS SPECIFIED IN pART 2

B. Operation and Maintenance Manufacture Data: For the following:

SPEC WRITER: DELETE WATER METERS BELOW IF PROVIDED BY UTILITY COMPANY.

1. Any/All Valves.

2. Backflow preventers.

3. Protective enclosures (valve boxes).

4. Hydrants.

1.3 QUALITY ASSURANCE

SPEC WRITER: RETAIN AND EDIT FIRST PARAGRAPH AND SUBPARAGRAPHS BELOW TO SUIT PROJECT OR DELETE IF NOT APPLICABLE.

A. Regulatory Requirements:

1. Comply with requirements of utility company supplying water. Include tapping of water mains and backflow prevention.

2. Comply with standards of authorities having jurisdiction for potable-water-service piping, including materials, installation, testing, and disinfection.

B. Piping materials shall bear label, stamp, or other markings of specified testing agency.

C. EPA Compliance: Ensure lead free EPA requirements are met for hydrants and plumbing.

D. NSF Compliance:

1. Comply with NSF 14 for plastic potable-water-service piping.

2. Comply with NSF 61 for materials for water-service piping and specialties for domestic water.

1.4 SYSTEM PERFORMANCE REQUIREMENTS

A. Minimum Working Pressures: The following are minimum pressure requirements for piping and specialties, unless otherwise indicated:

1. Potable-Water Service: 160 psig.

1.5 PROJECT CONDITIONS

SPEC WRITER: DELETE THIS ARTICLE IF NO EXISTING UTILITIES. COORDINATE WITH REQUIREMENTS SPECIFIED IN DIVISION 1 SECTION “TEMPORARY FACILITIES AND CONTROLS” FOR TEMPORARY UTILITIES.

A. Existing Water Utilities: The existing water system at the Echo Amphitheater Campground, is a US Forest Service owned system (public drinking water system) monitored by the New Mexico Environment Department; Drinking Water Bureau (NMED; DWB). Contractor may utilize the water system for various applications in accordance with the following:

1. All usage must first and foremost be approved and directly supervised by COR to ensure reasonable usage.

2. If the contractor wishes to hook up to existing drinking water system, it will be the responsibility of the contractor to provide a well-documented backflow prevention plan, furnish and install vacuum breakers on the hydrants to mitigate cross connections and aid in preventing contamination of the drinking water system.

3. Do not interrupt utilities serving facilities occupied by Government or others unless permitted under the following conditions and then only after arranging to provide temporary utility services according to requirements indicated: (IF APPLICABLE)

SPEC WRITER: EDIT FIRST SUBPARAGRAPH BELOW TO SUIT PROJECT.

4. Notify Contracting Officer (CO) not less than two days in advance have proposed utility interruptions. (IF APPLICABLE)

5. Do not proceed with utility interruptions without CO's written permission.

NOTE: If it is discovered that the contractor is not complying with any/all of the regulations noted in section 2.3 Project Conditions (or NMED DWB regulations), contractor will be held responsible for immediate disinfection of the system, any/all sampling required to sufficiently prove adequate disinfection and acceptable water quality, and will be responsible for providing their own water (regardless of the use) from that point on. All this at NO ADDITIONAL COST TO THE FEDERAL GOVERNMENT.

1.6 DELIVERY, STORAGE, AND HANDLING

A. Deliver piping with factory-applied end-caps. Maintain end-caps through shipping, storage, and handling to prevent pipe-end damage and to prevent entrance of dirt, debris, and moisture.

B. Protect flanges, fittings, and specialties from moisture and dirt.

C. Store plastic piping protected from direct sunlight. Support to prevent sagging and bending.

1.7 COORDINATION

SPEC WRITER: EDIT THIS ARTICLE TO SUIT PROJECT IF NEW WATER-SERVICE PIPING WILL CONNECT TO OTHER ON-SITE WATER-SERVICE PIPING.

A. Coordinate connections to existing water mains with Forest Service Engineer/CO.

B. Coordinate piping materials, sizes, entry locations, and pressure requirements with building water distribution piping.

C. Coordinate with other utility work.

part 2 - PRODUCTS

1.8 GENERAL

A. All waterlines, pipes, and fittings shall be new and unused, of the type, pressure rating or class, and size specified and as shown on the drawings.

1.9 pvc, schedule pipe

A. PVC, Schedule 80 Pipe: ASTM D 1785.

1. PVC, Schedule 80 Glued Fittings: ASTM D 2467.

1.10 couplings for similar or dissimilar pipe

A. Compression type transition fittings for making connections between like and dissimilar pipe materials shall be designed to enable a variety of connections between polyethylene pipe to various pipes. Fittings shall be Cepex performance series compression fittings as manufactured by Cepex Holding, S.A. and distributed by The Lateral Connection Corp., Sparks, NV 89434 (775) 626-6777 or approved equal and supplied by Ferguson Waterworks, Denver, CO, (303) 571-4444 or approved equal.

1.11 pipe sleeve

A. 4” PVC, Schedule 80 Pipe: ASTM D 1785.

1. PVC, Schedule 80 Socket Fittings: ASTM D 2467.

1.12 gate valve

A. 1” Gate shall be:

a. Grainger Approved Gate Valve: Class 200,1 in Pipe Size, 200 psi Max. Water Pressure – CWP, FNPT; Item 4VMW2, Mfr. Model 4VMW2; Or Approved Equal B. 1-1/2” Gate Valve shall be:

a. Grainger Approved Gate Valve: Class 200,1-1/2 in Pipe Size, 200 psi Max. Water Pressure – CWP; Item 4VMW4, Mfr. Model 4VMW4; Or Approved Equal NOTE: All fitting required for connection shall be accounted for in items 02510.01 & 02510.02 respectively.

OR FROM AIA

SPEC WRITER: AIA RECOMMENDS ONE OF THE FOLLOWING TYPES OF VALVES RETAIN ONE OF TWO SUBPARAGRAPHS BELOW.

Underground Valves, NPS 3 (DN 80) and Larger: AWWA, cast-iron, nonrising-stem, [metal] [resilient] [high-pressure, resilient]-seated, gate valves with valve box.

Underground Valves, NPS 4 (DN 100) and Larger, for Indicator Posts: UL/FM, Cast-iron, nonrising-stem gate valves with indicator post.

General Application: Use mechanical-joint-end valves for NPS 3 (DN 80) and larger underground installation. Use threaded- or flanged-end valves for installation in vaults. Use UL/FM, nonrising-stem gate valves for installation with indicator posts. Use corporation valves and curb valves with ends compatible with piping, for NPS 2 (DN 50) and smaller installation.

OR FROM AIA

1.13 Valve Boxes

A. Valve Boxes for this project will serve as housing for multiple drinking water system components and shall be:

a. Manufacturer: Bass & Hays Foundry, Inc.

1) Model No./Part: BH 536F 48” Depth x 36” Diameter

2) Associated Locking Lid: 5LID1

3) Or approved equal

1.14 underground detection and marking tape

A. Section 02316.

SPEC WRITER: DELETE ARTICLE BELOW TO SUIT PROJECT.

1.15 WATER METERS (not applicable IN THE CONTRACT)

A. Available Manufacturers:

1. Neptune Meters.

2. Badger Meter, Inc.

3. Or equal as approved by CO.

SPEC WRITER: RETAIN ONE OF FIRST TWO PARAGRAPHS BELOW. VERIFY TYPE OF METER REQUIRED WITH UTILITY COMPANY.

B. Description: AWWA C700, displacement-type, bronze main case. Register flow in gallons (liters) unless cubic feet (cubic meters) are indicated.

C. Description: AWWA C702, compound-type, bronze case. Register flow in gallons (liters) unless cubic feet (cubic meters) are indicated.

D. Water-Meter Boxes: Cast-iron body and cover for disc-type water meter with lettering "WATER METER" in cover; and slotted, open-bottom base section of length to fit over service piping.

1.16 BACKFLOW-PREVENTION DEVICES

A. Available Manufacturers:

1. Ames Co., Inc.

2. Cla-Val Co.

3. CMB Industries, Inc.; Febco Div.

4. Conbraco Industries, Inc.

5. FLOMATIC Corp.

6. Grinnell Corporation; Mueller Co.; Hersey Meters.

7. Watts Industries, Inc.; Water Products Div.

8. Zurn Industries, Inc.; Wilkins Div.

9. Or equal as approved by CO.

B. General: ASSE standard, backflow preventers.

1. Working Pressure: 150 psig (1035 kPa) minimum, unless otherwise indicated.

2. NPS 2 (DN 50) and Smaller: Bronze body with threaded ends.

3. NPS 2-1/2 (DN 65) and Larger: Bronze, cast-iron, steel, or stainless steel body with flanged ends.

a. Interior Lining: AWWA C550 or FDA-approved, epoxy coating for backflow preventers having cast-iron or steel body.

4. Interior Components: Corrosion-resistant materials.

5. Exterior Finish: Polished chrome plate if used in chrome-plated piping system.

SPEC WRITER: UNITS IN PARAGRAPH BELOW ARE FOR MODERATE TO HIGH HAZARD AND ARE AVAILABLE IN NPS ¼ TO NPS 3 (DN 8 TO DN 80). THEY ARE UNSUITABLE FOR CONTINUOUS PRESSURE OR PROTECTION FROM BACKFLOW.

SPEC WRITER: UNITS IN PARAGRAPH BELOW ARE FOR LOW HAZARD AND ARE AVAILABLE IN NPS ¾ TO NPS 10 (DN20 TO DN 250).

C. Double-Check-Valve Backflow Prevention Assemblies: [ASSE 1015] [or] [AWWA C510], suitable for continuous pressure application. Include outside screw and yoke gate valves on inlet and outlet, and strainer on inlet; test cocks; and two positive-seating check valves.

1. Maximum Pressure Loss: [5 psig (35 kPa)] through middle 1/3 of flow range.

SPEC WRITER: RETAIN PARAGRAPH AND SUBPARAGRAPH ABOVE OR BELOW.

SPEC WRITER: UNITS IN PARAGRAPH BELOW ARE FOR MODERATE TO HIGH HAZARD AND ARE AVAILABLE IN NPS ½ TO NPS 2 (DN 15 TO DN 50).

1.17 YARD HYDRANTS

A. All Drinking Water Hydrants shall be:

1. Murdock M-92 3/4" Hydrant with Paddle Handle; 3/4" Freeze Resistant, Compression-Type Post Hydrant complete with the “BFH” option (double ball check valve and vacuum breaker).

2. For bidding purposes depth to bury shall be estimated at 4 feet.

3. Any and all fittings needed to connect to either existing or new/supply line(s) shall be incidental to Line Items 02510.01 & 02510.02 respectively.

All dimensions after installation conform to the dimensions as SHOWN ON THE DRAWINGS. The hydrant provided meets all requirements of the Forest Service Outdoor Recreation Accessibility Guidelines (FSORAG) section 4.7. Submit hydrant section to COR before installation.

Accessibility standards: All dimensions after installation shall conform to the dimensions shown on the drawings. In addition to the dimensions shown, the hydrant provided shall meet all the Forest Service Outdoor Recreation Accessibility Guidelines (FORSAG).

Concrete Hydrant Pad shall drain a maximum of 2% and shall be designed to drain water away from the user.

part 3 - EXECUTION

1.18 pipe alignment and grade

A. Construct the water system to the lines and grades shown or established in the field.

B. Stake locations of water lines as shown on the drawings. The Contracting Officer (CO) shall approve the water line location prior to the start of excavation.

C. Pipelines may be relocated slightly, if necessary, to avoid existing obstacles. However, seasonally operated lines shall be installed to slope towards drains as shown on the drawings.

D. Deflections from a straight line or grade, as required by vertical curves, horizontal curves, or offsets, shall not exceed the manufacturer's recommended maximum joint deflection or curvature for their pipe. If the alignment requires curvature or deflections in excess of these limitations, the Contractor shall provide special bends, standard fittings, or a sufficient number of shorter lengths of pipe to provide angular deflections at the joints within the limit set forth by the manufacturer.

E. Bends resulting in tension on joints will not be allowed.

1.19 General

A. All pipe, fittings, and appurtenances shall be handled and laid in strict conformance to the manufacturer’s recommendations.

B. Drains, valves, and other regulating and controlling devices shall be installed in the line where called for on the drawings.

C. The interior of all pipe, fittings, and other accessories shall be kept as free as possible from dirt and foreign matter at all times. Each piece of line as it is laid shall be cleaned of all debris. When the pipeline has become dirty on the inside during shipment or storage, it shall be swabbed out by drawing a damp swab through the line before lying. Care shall be exercised to keep all joining surfaces clean. Any pipe with contaminated or damaged joining surfaces, which cannot be satisfactorily cleaned or repaired, shall be discarded. Under no circumstances shall pipe be laid in water, and no pipe shall be laid when trench conditions or the weather is unsuitable for such work. At all times when work is not in progress, all open ends of the pipe and fittings shall be securely closed to the satisfaction of the CO so that no trench water, rodents, earth, or other substance will enter the pipe or fittings.

D. Any section of pipe already laid and found to be defective shall be taken up and replaced with new pipe at the Contractor’s expense.

E. When sewer and water lines cross, the water and sewer pipes shall be centered at the crossing so that the joints will be an equal distance and as far as possible from the crossing. When sewer lines are less than 10 feet horizontally from water lines or if they are less than 18 inches lower than waterlines then encase the joints of the sewer lines in concrete.

F. Where water line crosses a road culvert, adjust grade of water line to provide a minimum of 12 inches of separation between the water line and culvert, maintaining slope of water line to daylight drain.

G. A minimum of one-foot separation shall be maintained between electric and water lines in the same trench. Unless the electric conductors are in conduit the water line shall be a minimum of one foot below the electric conductors.

SPEC WRITER: EDIT FIRST PARAGRAPH BELOW FOR REQUIRED MINIMUM DEPTH IF KNOWN.

H. Bury piping with depth of cover over top at least 30 inches (750 mm), with top at least 12 inches (300 mm) below level of maximum frost penetration.

SPEC WRITER: RETAIN AND EDIT PARAGRAPH BELOW FOR PIPING WITH GASKETED JOINTS; DELETE IF NOT REQUIRED.

I. Install underground piping with restrained joints at horizontal and vertical changes in direction. Use restrained-joint piping, thrust blocks, anchors, tie-rods and clamps, and other supports.

SPEC WRITER: RETAIN AND EDIT BELOW FOR PIPING WITH GASKETED JOINTS; DELETE IF NOT REQUIRED OR IF PIPING IS ADEQUATELY RESTRAINED INSIDE BUILDING.

J. Anchor service-entry piping to building wall.

1.20 eXCAVATION, TRENCHING AND BEDDING

A. Refer to Section 02316 EXCAVATION, TRENCING AND BACKFILLING FOR UTILITIES SYSTEMS.

1.21 cutting and handling of pipe

A. Cutting of pipe for closure pieces or for other reasons shall be done in a neat manner by methods, which will not damage the pipe. The pipe and fittings shall be handled in such a manner as to insure delivery and final placement in good, undamaged condition. Particular care shall be exercised not to injure the pipe surfaces or coatings. Damaged pipe shall not be used in the work.

1.22 laying pipe

A. No pipe shall be placed in the trench until the CO has approved the trench and bedding.

1. Bedding Requirements: Utility/pipe shall not rest on an uneven surface with protruding rocks. Should the bottom of the trench not be a smooth even surface free of protruding rock and debri, contractor shall bed pipe with “Satisfactory Material” as defined in As specified in “Section 02316 EXCAVATION, TRENCING AND BACKFILLING FOR UTILITIES SYSTEMS.” Bedding layer shall be no less than 3” but shall be thick enough to ensure pipe is not resting on protruding rock and/or debri.

B. Each section of the pipe shall rest upon the pipe bed for the full length of its barrel.

C. Backfill the pipe within 24 hours after installing the pipe in the trench, leaving the joints and one foot of pipe on each side of each joint exposed until testing is complete.

D. When work is not in progress, securely close open ends of pipe and fittings.

E. When high density polyethylene pipe is used, it shall be weaved in the trench to provide horizontal slack in the line for expansion and contraction.

F. High density polyethylene pipe shall be allowed to cool to within 20° F of the shaded trench bottom temperature before backfilling.

1.23 JOINT CONSTRUCTION

A. Joints shall be made using jointing materials and applied with the proper accessories, in accordance with the manufacturer’s instructions. The joints shall be adjusted and the work performed in a manner so as to obtain the degree of water tightness required. If pipe and fittings are assembled with lubricant, it must be nontoxic. Where connections are made between new work and existing lines, the connections shall be made by using special fittings to suit the actual conditions.

B. Dissimilar Materials Piping Joints

1. Polyethylene pipe and fittings may be joined to other materials by means of couplings designed for joining polyethylene pipe to another material. Couplings shall be fully pressure rated and fully thrust restrained such that when installed in accordance with manufacturer’s recommendations, a longitudinal load applied to the coupling will cause the pipe to yield before the coupling disjoints.

2. Use adapters compatible with both piping materials, OD, and system working pressure.

or from aia

1.24 JOINT CONSTRUCTION

A. Make pipe joints according to the following:

1. PVC Piping Gasketed Joints: Use joining materials according to AWWA C900. Construct joints with elastomeric seals and lubricant according to ASTM D 2774 or ASTM D 3139 and pipe manufacturer's written instructions.

2. Dissimilar Materials Piping Joints: Use adapters compatible with both piping materials, with OD, and with system working pressure.

1.25 connection to EXISTING WATERLINE A. Arrange connections with Forest Service Engineer/CO.

SPEC WRITER: RETAIN ONE OF TWO SUBPARAGRAPHS BELOW.

B. Tap water main according to requirements of Forest Service in location indicated.

C. Branch connections to the main shall be made with tees.

D. Waterline tees shall be the same diameter as the largest pipe connected to the tee.

SPEC WRITER: RETAIN PARAGRAPH AND SUBPARAGRAPHS BELOW FOR TAPPING OF PIPE WITH CONNECTIONS LARGER THAN NPS 2 (DN 50).

1.26 ANCHORAGE INSTALLATION

SPEC WRITER: DELETE THIS ARTICLE IF ANCHORAGES ARE NOT REQUIRED.

A. Install anchorages for tees, plugs and caps, bends, crosses, valves, and hydrant branches. Include anchorages for the following piping systems:

1. Gasketed-Joint, PVC Water-Service Piping: According to AWWA M23.

1.27 Pipe sleeve INSTALLATION

A. Where waterline crosses road paving install waterline in pipe sleeve. Extend pipe sleeve a minimum of three feet beyond edge of pavement.

B. Waterline tees shall be the same diameter as the largest pipe connected to the tee.

1.28 VALVE INSTALLATION

A. AWWA Gate Valves

1. Comply with AWWA C600 and AWWA M44

2. Install each underground valve with stem pointing up and with valve box.

3. Install concrete pad around top of box as shown on the drawings.

B. UL/FM Gate Valves

1. Comply with NFPA 24.

2. Install each underground valve and valves in vaults with stem pointing up and with vertical cast-iron indicator post.

1.29 WATER-METER INSTALLATION

SPEC WRITER: DELETE THIS ARTICLE IF UTILITY COMPANY PROVIDES WATER METERS.

A. Install water meters, piping, and specialties according to utility company's written requirements.

SPEC WRITER: RETAIN ONE OF TWO PARAGRAPHS BELOW.

B. Water Meters: Install displacement-type water meters, NPS 2 (DN 50) and smaller, in meter boxes with shutoff valves on water-meter inlets. Include valves on water-meter outlets and valve bypass around meters unless prohibited by authorities having jurisdiction.

C. Water Meters: Install compound-type water meters, NPS 3 (DN 80) and larger, in meter vaults. Include shutoff valves on water-meter inlets and outlets and valve bypass around meters. Support meters, valves, and piping on brick or concrete piers.

SPEC WRITER: RESTAIN BELOW ONLY IF CONTRACTOR IS TO ROUGH IN FOR WATER METERS TO BE INSTALLED BY UTILITY COMPANY.

D. Rough-in piping and specialties for water-meter installation according to utility company's written instructions and requirements.

1.30 BACKFLOW-PREVENTER INSTALLATION

A. Install backflow preventers of type, size, and capacity indicated. Include valves and test cocks. Install according to requirements of plumbing and health department and authorities having jurisdiction.

B. Backflow preventors shall be installed in a steel water meter compartment for future access/inspection. See section: Part 2-Products 3.11 item E. Contractor shall provide USFS with 3 “keys” for accessing the water meter compartment.

C. Do not install bypass piping around backflow preventers.

SPEC WRITER: REVISE BELOW TO SUIT PROJECT OR DELETE.

D. Support NPS 2-1/2 (DN 65) and larger backflow preventers, valves, and piping near floor and on brick or concrete piers.

1.31 YARD HYDRANT INSTALLATION

A. Install sanitary-type yard hydrants in pavement or with concrete anchor as indicated by manufacurer.

1.32 Capping/Terminatin piping

A. Terminate water-service piping at shown in drawings. Verify locations with Forest Service Engineer/CO. Terminate piping with caps, plugs, or flanges as required for piping material. Coordinate waterline draining with Forest Service Engineer/CO prior to cutting and capping lines.

1.33 backfilling and waterline marking

A. As specified in “Section 02316 EXCAVATION, TRENCING AND BACKFILLING FOR UTILITIES SYSTEMS.”

1.34 Final pipe cleaning and flushing

A. Before testing, clean new water distribution piping systems and parts of existing systems that have been altered, extended, or repaired by high pressure water jet or mechanical means.

B. If the new waterlines are extensions or modifications of an existing water system, the new system(s) and all of the existing system immediately downstream of the control valve shall be flushed to remove sediment. The control valve referred to here is the valve in the existing system that must be closed to allow construction of new facilities.

C. During the flushing operation, operate all valves, hydrants, hose bibs and other outlets.

D. Flush system with clean potable water until dirty water does not appear at points of outlet.

1.35 pressure testing waterlines

A. Conduct piping tests before joints are covered and after thrust blocks, if required, have hardened sufficiently. Joints shall remain uncovered until testing is completed satisfactorily.

B. The Contractor shall furnish the pump, pipe, gauge, measuring device, connections, and all other necessary apparatus, and shall furnish the necessary personnel to conduct the tests. All equipment, gauges, and attachments shall be subject to approval by the CO.

C. The CO and/or COR shall be present during the testing period.

D. Test all newly constructed portions of the water system, including water mains, service lines, fittings, valves, and hydrants. New waterlines that are extensions or modifications of an existing water system shall be tested at the test pressure specified here unless the CO specifies another pressure. Pneumatic testing will not be allowed.

E. Use only potable water.

F. Waterlines shall be tested in sections not to exceed 2,000 ft in length or a maximum pressure differential of 30 psi in the test section.

G. Test Procedure

1. Slowly fill each valve or plugged test section of pipe with water. The line shall be filled by means of a pump connected to the pipe. Operate all hydrants and taps to bleed entrapped air from the test section. Operate the pump continuously during bleeding operations. The pump shall take suction from a small auxiliary tank for measuring the water the water pumped into the test section.

2. Raise the internal pressure of the system by pumping in water. Increase pressure in 50-psig increments and inspect each joint between increments. Raise internal pressure to a test pressure of 1.5 times the working pressure at the point of testing based on the elevation of the lowest point of the line or section under test, or other test pressure as approved by the CO.

3. The system should be allowed to stabilize for 3 hours at the test pressure before conducting the hydrostatic test. Make up liquid may be added during this time to return to test pressure.

4. After obtaining the approved test pressure record the water level in the auxiliary tank.

5. The test phase follows immediately and shall last 2 hours.

6. Immediately following the initial expansion phase, reduce the test pressure by 10 psi, and stop adding test liquid. If the test pressure remains steady (within 5% of the target value) for one (1) hour, no leakage is indicated.

H. Leakage shall be verified by the Contractor and the CO.

I. If there is leakage in excess of the above requirements, the Contractor shall, at his own expense, locate and replace any defective pipe, fittings, valves, joints, and hydrants as required, until the leakage is within the specified allowance. All visible leaks are to be repaired regardless of the amount of leakage. Flush the system, and repeat the pressure test until leak is repaired.

J. No paints, asphalts, tars, enamels, or other types of pipe compounds shall be used to eliminate leaks.

K. Backfill for waterlines shall be completed after the CO approves testing.

L. The Contractor shall furnish a written report to the CO describing the results of each test. The report must identify the specific portions of the pipeline tested, the pressure, the duration of the tests, and the amount of leakage.

1.36 DISINFECTION OF WATERLINES

A. Disinfection by chlorination will be performed by US Forest Service staff once Contractor has properly installed, and pressure checked all new components of the water system per contract line items, requirements and specifications.

B. Contractor will be held responsible for the disinfection of the water system, AT NO ADDITIONAL COST TO THE FEDERAL GOVERNMENT, if found in non-compliance with guidelines in section 2.3 Project Conditions of this document.

1. In this event contractor shall follow NMED DWB Revised Total Coliform guidelines for a seasonal water system startup. The NMED DWB has a form that the contractor will be responsible for obtaining and filling out to ensure NMED DWB guidelines are adhered to. All disinfection work shall take place immediately, and COR must be present throughout the entire process. Contractor shall submit form to COR. NOTE: All disinfection work must be performed by a Certified Water Operator as defined by NMED DWB. Certification level must be in accordance with water system classification.

C. Dosage: Provide chlorine solution with approximately 25 mg/l of total chlorine for disinfecting the water system unless otherwise directed by the CO.

END OF SECTION 02510

02510 - 27

WATER DISTRIBUTION