Cordova_Water_System_Specifications.pdf

USDA Forest Service

Chugach National Forest

Cordova Work Center Water Line Replacement

Technical Specifications

LIST OF TECHNICAL SPECIFICATIONS

010100 SUMMARY OF WORK

011250 MEASUREMENT AND PAYMENT

013300 SUBMITTALS

017320 SELECTIVE DEMOLITION

221100 WATER DISTRIBUTION SYSTEMS

221103 PLUMBING APPURTENANCES

312000 EARTHWORK

321216 ASPHALT PAVING

SUMMARY OF WORK SECTION 010100- 1

USDA FOREST SERVICE, R-10

CORDOVA WORK CENTER WATER LINE REPLACEMENT

SECTION 010100 - SUMMARY OF WORK

PART 1 - GENERAL

1.1 SUMMARY

A. Work for this project involves replacement of water distribution piping at the Cordova Work Center. The Cordova Work Center consists of a warehouse, storage building, an 8 person crewhouse, a 12 person crewhouse, a four-plex residence, carport, woodshed, and multiple other out buildings. This work shall include the following:

BASE ITEMS

1. 11900 Mobilization, Demobilization, and Bonding. This Item includes transport of all equipment, labor, and materials to and from the site; and bonding. Contractor shall pothole all potential conflicts and utility crossings incidental to this item and report any issues to the CO.

2. 221100-A 1-1/4” HDPE Waterline Replacement. Replacement of copper waterline with approximately 560’ of 1.25” HDPE water line. Incidental to this item is all waterline fittings and appurtencances; line marker posts, wire, and tape;

all earthwork including bedding and backfill material, and care taken to preserve vegetation onsite; 4” PVC conduit with water metering system control conduit and CAT5 cable to each service connection in shared waterline trench; and final hydrostatic testing and disinfection.

3. 221100-B Curb Valve and Box Assembly. (3) total installations each including

(1) 1.25” poly curb valve, (1) 1” poly curb valve and (2) contractor furnished valve boxes. Incidental to this are all line; fittings and appurtenances; box insulation; and all other work within 5’ of valve boxes. Also incidental, Contractor shall furnish

(1) dry steam machine for thawing line and valves.

4. 221100-C 1” HDPE Waterline Replacement. Replacement of copper waterline with approximately 170’ of 1.00” HDPE water line. Incidental to this item are all waterline fittings and appurtenances; line marker posts, wire, and tape; all earthwork including bedding and backfill material, and care taken to preserve vegetation onsite; 4” PVC conduit with water metering system control conduit and CAT5 cable to each service connection in shared waterline trench; and final hydrostatic testing and disinfection.

5. 221100-D Waterline Tie-In. Connection of new HDPE 1.25” waterline to existing 1.25” copper water service lateral within 5’ of existing cast iron city water main.

Work shall not interfere with city water service and any impacts should be coordinated with the City of Cordova.

6. 221103-A Main Junction Valve Cluster Replacement. Removal of an existing corrugated metal valve box at the main system junction and adjacent line and appurtenances. Replacement with a new main valve cluster in the warehouse crawlspace. Valve cluster shall include (2) 1.25” globe valves and (1) 1” globe

SUMMARY OF WORK SECTION 010100- 2

valve. Incidental to this are all line; valves; fittings and appurtenances; line and valve insulation; all other work including earthwork within 5’ of existing utility box.

7. 221103-B Reduced Pressure Principle Backflow Assembly Installation of a new reduced pressure backflow assembly within the crawlspace of the warehouse.

Incidental to this work are all pipe, fittings and appurtenances; and assembly and pipe insulation..

8. 221103-C Service Connection Assembly A. Replacement of the warehouse service connection. Work includes replacement of existing copper waterline with new HDPE waterline from exterior through building foundation to 5’ past the stem wall; watertight and flexible pipe sleeves; atleast 5’ from stermwall, transition from HDPE to copper pipe, check valve, (2) globe valves, 1” water meter and register;

select demolition; earthwork; above ground pipe, and valve insulation within the crawl spaces as well as trench insulation where waterline rises above 7’ min. bury depth at foundation penetration; pipe supports; all pipe, fittings, and appurtanances;

and all other work within 5’ of exterior foundation and 10’ interior foundation.

Contractor shall complete wiring of remote data logger (to be located in the garage of the warehouse) with the conductors from all 4 water meters onsite. The FS will program the data logger.

9. 221103-D Service Connection Assembly B. Replacement of service connections including those to the (2) crewhouses, and (1) four-plex residence. Work includes replacement of existing copper waterline with new HDPE waterline from exterior through building stem wall foundation to 5’ past the stem wall; watertight and flexible pipe sleeves; atleast 5’ from stem wall transition from HDPE to copper pipe, check valve, (2) globe valves, water meter and register. Incidental to this work are conductors and conduit; completion of water meter wiring; select demolition;

earthwork; pipe, and valve insulation within the crawl spaces as well as trench insulation where waterline rises above 7’ min. bury depth at foundation penetration;

pipe supports; all pipe, fittings, and appurtanances; and all other work within 5’ of exterior foundation and 10’ interior foundation. Contractor shall decommission the distribution line to the fourplex residence within the crawlspace of the adjacent 8 person crewhouse.

OPTION ITEMS

1. 321216-A Asphalt Paving Resurfacing. Repave Cordova Workcenter parking lot with 2” asphalt overlay and paint striping. This option item can be coordinated with another paving job in Cordova to minimize asphalt plant mobilization costs. It can be completed within 2 years of the issuance of the notice to proceed on the base work at such a time when asphalt plant equipment is locally available. The estimated area of existing asphalt within the Workcenter is 18,010 SF, or 1674 SY.

Contractor shall confirm this measurement prior to bid. Incidental to this item is all work required to clean and prepare existing asphalt, and all materials, labor, equipment required to install new asphalt pavement to specification.

SUMMARY OF WORK SECTION 010100- 3

1.2 LOCATION

A. The Forest Service Work Center in Cordova AK is located at 913 Le Fevre Street.

1.3 GENERAL SITE CONDITIONS AND WEATHER

A. The elevation of the work Center is approximately 38 feet above mean sea level. The construction site is in a residential municipal setting and experiences heavy snowfall and cold temperatures, with snow on the ground typically from mid-September through May.

B. In-depth soil surveys have not been performed; however, rocks at the ground surface are evident throughout the area. Blasting of rocks will not be permitted.

C. In-depth water table surveys have not been performed; however groundwater has been encountered in prior excavations and should be expected in this work. The Contractor shall perform adequate dewatering to keep the excavation free from water and dispose of the water without damage to property.

1.4 USE OF PREMISES

A. General: Contractor shall have full access to grounds for construction operations during construction period, and limited access to facilities. Contractor's use of premises is limited by the Government's right to perform work or to retain other contractors on portions of Project site. Crew housing buildings will not be available other than for construction access. Power, water, and toilet facilities are available in the warehouse.

Building access shall be coordinated with CO.

B. Contractor shall conduct his operations to ensure the least inconvenience to the public and employees. Work is limited to the hours of 7am-8pm to accommodate FS personnel living onsite.

C. Notify Contracting Officer at least 72 hours prior to start of work. Provide 24 hours notice prior to any work occurring within warehouse, crewhouses, or residence.

D. Confine storage of equipment and materials to areas as approved by the CO.

E. Contractor shall provide adequate signing and barricades and take necessary safety measures to protect the public during all construction operations. Contractor shall minimize disturbance of all undisturbed areas.

F. Preservation of Natural Features: Confines all operations to work limits of the project.

Prevent damage to natural surroundings. Restore damaged areas, repairing or replacing damaged trees and plants, at no additional expense to the Government.

1. Provide temporary barriers to protect existing trees and plants and root zones.

2. Do not remove, injure, or destroy trees or other plants without prior approval.

Consult with CO and remove agreed-on roots and branches that interfere with construction.

3. Do not fasten ropes, cables, or guys to existing trees.

4. Carefully supervise excavating, grading, filling, and other construction operations near trees to prevent damage.

SUMMARY OF WORK SECTION 010100- 4

G. Existing Utilities: Notify CO and utility companies of proposed locations and times for excavation.

1. Contractor shall be responsible for locating and preventing damage to known utilities. Call the Alaska Dig Line at 811 or 1-800-478-3121 2 business days in advance of excavation for the marking of underground utilities. If damage occurs, repair utility at no additional expense to the Government.

2. Interruption of Existing Utility Service: Notify CO, 48 hours in advance of any interruption of existing utilities.

3. Water service interruption shall be minimized and approved by the Contracting Officer in the construction schedule.

1.5 MEALS AND LODGING

A. Meals and lodging are commercially available in the city of Cordova area within 5 miles of the construction site. Meals or lodging will not be available at Forest Service facilities.

1.6 CAMPING

A. With approval by the Cordova Ranger District, National Forest Service lands may be used by the Contractor to have one fully contained recreation vehicle which may remain at this site for security.

1.7 CONSTRUCTION SEQUENCE

A. In order to reduce impact to residents in the 4-plex and bunkhouses, this project should be planned for September or October. Water outages to the 4-plex residences and the bunkhouses shall be kept to a minimum, no longer than 24 hours at a time if possible.

Contractor shall provide construction sequencing in the schedule that reduces service interruption to the inhabited buildings.

B. Depending on conditions, normal fire restrictions may apply to activities associated with this project.

C. The Contractor may use water and power utilities available onsite.

1.8 FIELD VERIFICATION

A. Field verify all new and existing dimensions affecting the work of this contract before ordering materials.

1.9 PERMITS

A. Special permits for electrical work or any other permits required by County, State, or Federal laws or regulations shall be obtained by the Contractor.

PART 2 - PRODUCTS (Not Used)

PART 3 - EXECUTION (Not Used)

SUMMARY OF WORK SECTION 010100- 5

END OF SECTION 010100

May 2019

MEASUREMENT AND PAYMENT 011250- 1

CORDOVA WORK CENTER WATERLINE REPLACEMENT

SECTION 011250 - MEASUREMENT AND PAYMENT

PART 1 - GENERAL

1.1 SUMMARY

A. Measurement and payment for contract work will be made only for and under those pay items included in the Schedule of Items. All other work, labor, materials, equipment, and incidentals necessary to successfully complete the project will be considered as included in the payment for items shown. This section defines the method of measurements and basis of payment for work items listed in the Schedule of Items.

B. When more than one class, size, type, thickness, etc. is specified in the Schedule of Items for any pay item, suffixes will be added to the item number to differentiate between the pay items.

1.2 DETERMINATION OF QUANTITIES

A. The following measurements and calculations shall be used to determine contract quantities for payment.

1. For items that are measured by the linear foot, such as pipe culverts, fencing, guardrail, piping, utilities, and underdrains, measurements shall be made parallel to the base or foundation upon which the structures are placed.

1.3 UNITS OF MEASUREMENT

A. Payment shall be by units defined and determined according to U.S. Standard measure and by the following:

1. Each (EA): One complete unit, which may consist of one or more parts.

2. Linear Foot (LF): Measurement of work along its length from point-to-point;

parallel to the base or foundation. Do not measure overlaps.

3. Lump Sum (LS): One complete unit.

1.4 METHOD OF MEASUREMENT

A. One of the following methods of measurement for determining final payment is designated on the Schedule of Items for each pay item:

1. ACTUAL QUANTITIES (AQ) - These quantities are determined from actual measurements of completed work.

2. LUMP SUM QUANTITIES (LSQ) - These quantities denote one complete unit of work as required by or described in the contract, including necessary materials, equipment, and labor to complete the job. They shall not be measured.

MEASUREMENT AND PAYMENT 011250- 2

PART 2 - PRODUCTS (NOT APPLICABLE)

PART 3 - EXECUTION (NOT APPLICABLE)

END OF SECTION 011250

WATER DISTRIBUTION SYSTEMS 221100- 1

CORDOVA WORK CENTER WATER SYSTEM UPGRADES

SECTION 221100 - WATER DISTRIBUTION SYSTEMS

PART 1 - GENERAL

1.1 SUMMARY

A. This Section shall consist of furnishing and installing the following:

1. Potable water distribution pipe and fittings.

2. Valves, valve boxes and appurtenances.

B. This Section shall also include the flushing, testing and disinfection of waterlines.

C. Related Sections include the following:.

1. Section 312000 “Earthwork.”

1.2 DEFINITIONS

A. HDPE: High Density Polyethylene plastic.

B. PVC: Polyvinyl Chloride

C. NSF: Formerly National Sanitation Foundation, now NSF International, a global public health and safety organization

1.3 SUBMITTALS

A. Product Data: For the following:

1. Pipe and fittings.

2. Valves, valve boxes, operating wrenches.

B. Plan for disposal of water used for testing and disinfection of waterlines.

C. Water System Operations and Maintenance Manual.

1.4 QUALITY ASSURANCE

A. All work is to be completed according to applicable Federal, State and Local codes. This work includes, but is not limited to, materials, installation, testing and disinfection.

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

C. NSF Compliance:

1. Comply with NSF 14 for plastic potable-water-service piping. Include marking "NSF-pw" on piping.

WATER DISTRIBUTION SYSTEMS 221100- 2

2. Comply with NSF 61 Annex G for materials for water-service piping and specialties for domestic water. All pipes, fittings, fixtures, solder and flux shall meet the 0.25% maximum lead content rules for all wetted components.

1.5 MINIMUM SYSTEM REQUIREMENTS

A. Unless otherwise noted, the minimum working pressure for piping and specialties shall be 160 psig.

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 stored piping from moisture and dirt. Elevate above grade.

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

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

1.7 PROJECT CONDITIONS

A. Existing Utilities: Do not interrupt utilities serving facilities occupied by the Government or others unless permitted under the following conditions:

1. Notify the Contracting Officer not less than three days in advance of proposed utility interruptions.

2. Do not proceed with utility interruptions without the Contracting Officer’s written permission.

3. Construction shall not interfere in any way with the city water system.

1.8 COORDINATION

A. Coordinate connection to existing waterlines with Contracting Officer.

B. Verify piping materials, sizes, entry locations and pressure requirements are compatible with connection point.

C. Contractor shall coordinate work with the City of Cordova Water Superintendent.

D. Coordinate other utility impacts.

1.9 MEASUREMENT AND PAYMENT

A. Payment will be as listed for the following items:

1. 221100-A, 1-1/4” HDPE Waterline Replacement

2. 221100-B, Curb Valve and Box Assembly

3. 221100-C, 1” HDPE Waterline Replacement

WATER DISTRIBUTION SYSTEMS 221100- 3

4. 221100-D, Waterline Tie-In

5. 221103-A, Main Junction Valve Cluster Replacement

6. 221103-B, Reduced Pressure Backflow Assembly

7. 221103-C, Service Connection Assembly A

8. 221103-D, Service Connection Assembly B

PART 2 - PRODUCTS

2.1 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.

2.2 WATER DISTRIBUTION PIPES AND FITTINGS AND CONDUIT

A. PVC (For pipe sleeves and conduit only): ASTM D 1785, Schedule 40; solvent-cemented joints.

1. Solvent Cement: ASTM D 2564.

2. Socket Fittings: PVC, Schedule 40, ASTM D 2467.

B. HDPE (For all new piping):

1. Pipe, AWWA C901:

a. Material Designation: PE 4710 resin

b. Material Classification: ASTM D1248

c. Minimum Cell Classification: ASTM D 3350, 445574C

d. Dimension Ratio and Minimum Pressure Rating: DR 11, 160 psig

e. NSF-61 Listed

2. Fittings:

a. Molded HDPE Fittings: ASTM D 3350, PE 4710 resin, butt-fusion type, made to match HDPE pipe dimensions and class.

b. Insert Fittings: Not allowed.

c. Transition Fittings to non-HDPE Pipe: Approved by HDPE pipe manufacturer. Compression-type fittings are not allowed.

d. HDPE transitions to copper line shall be welded/threaded, AWWA 800-89 and NSF 61 certified, manufactured to D1599, D1598, and F-714, Series 911 Adaptor as manufactured by Poly-Cam, Inc OR approved equal

3. Buried HDPE Frost Protection: Closed cell extruded polystyrene foam board insulation. Styrofoam Highload 40 Extruded Polystyrene Insulation as manufactured by Dow Chemical Company or approved equal.

a. Thermal Resistance, per inch, ASTM C518, C177, R-value min: 5.0

b. Compressive Strength, ASTM D1621, psi, min: 40

WATER DISTRIBUTION SYSTEMS 221100- 4

c. Water Absorption, ASTM C272, % by volume, 24 Hr max: 0.3

d. Water Vapor Permeance, ASTM E96, perms: 1.0

e. Max Use Temp, deg F: 165

f. Coeff. Linear Therm. Expansion, ASTM D696, in/in°F: 3.5X10-5

g. Flexural Strength, ASTM C203, psi, min: 60

h. Compressive Modulus. ASTM D 1621, psi, typical: 1,400

i. Complies with ASTM C578, Type: VI

Where water lines rise above the 7’ minimum bury depth to penetrate stem wall foundations at service connections, water line trenches shall be insulated.

Additionally buried insulation shall surround the valve boxes. Insulation shall terminate directly against and flush with the surfaces of service connection foundations and valve boxes.

C. Copper Tube and Fittings (if needed for repairs to lines scheduled to remain.)

1. Soft Copper Tube: ASTM B88, Type K, water tube, annealed temper.

2. Copper Fittings: ASME B16.18, cast-copper-alloy or ASME B16.22, wrought-copper, solder-joint pressure type. Furnish only wrought-copper fittings if indicated.

3. Copper Unions: MSS SP-123, cast-copper-alloy, hexagonal-stock body with ball-and-socket, metal-to-metal seating surfaces, and solder-joint or threaded ends.

2.3 ELECTRICAL CABLE

A. Ethernet Cable

1. Description: Category 5e transmission performance characterized to 350MHz, for 10BASE-T through 1000BASE-T Ethernet applications, OSP rated, copper shield tapes, fully filled construction, UV resistant, suitable for buried applications.

2. Model: BBDGE OSP CAT 5e as manufactured by Superior Essex or approved equal.

2.4 WATER VALVES, BOXES, and APPURTENANCES

A. Valves: Valves shall be the same nominal size as the line in which they are installed or as indicated on the Drawings.

1. Valve Operating Rods: Steel, tee-handle, stem of length to operate deepest buried valve, and end socket to match curb valve. Furnish one valve operating wrench with every five (or fraction thereof) curb boxes installed, as indicated on the Drawings.

B. Poly Valves (All Buried Valves)

1. NSF 61 Certified. Potable water systems only. Valves used in gas distribution are not permitted.

2. PE4710 resin.

3. Opening (Bore): Full port.

4. Ball lubricant shall be optimized for potable water applications.

WATER DISTRIBUTION SYSTEMS 221100- 5

5. Dimension Ratio and Pressure Rating: Same as pipe in which the valve is installed

6. Model: Polyvalve “Poly-Water II NSF” Valves, as manufactured by Polyvalve

LLC, an Andronaco Industries Company., or an approved equal.

a. Body: Polyethylene

b. Adapter: Polypropylene

c. Groundwater Seal: Neoprene

d. Seat and Stem Seal: EPDM

e. Ball: Acetal

f. Seat Retainer: Acetal

g. Stem: Stainless Steel

h. End Configuration: Butt fusion

i. Operator: 2” square nut

C. VALVE BOXES

1. Valve boxes shall be furnished for all buried valves sized to fit the entire assembly.

Valve boxes shall consist of galvanized steel, and lockable lid. Contractor may fabricate a box and lid system, consistent with project plans, in lieu of a commercial box.

a. Cover shall receive a 2” padlock.

b. Cover shall be easily removeable by hand.

2. Insulation of Valve Boxes: 4” Thick closed cell extruded polystyrene foam board insulation. Cut to fit tightly and attached securely to underside of lid, and placed around box exterior. Styrofoam Highload 40 Extruded Polystyrene Insulation as manufactured by Dow Chemical Company or approved equal.

a. Thermal Resistance, per inch, ASTM C518, C177, R-value min: 5.0

b. Compressive Strength, ASTM D1621, psi, min: 40

c. Water Absorption, ASTM C272, % by volume, 24 Hr max: 0.3

d. Water Vapor Permeance, ASTM E96, perms: 1.0

e. Max Use Temp, deg F: 165

f. Coeff. Linear Therm. Expansion, ASTM D696, in/in°F: 3.5X10-5

g. Flexural Strength, ASTM C203, psi, min: 60

h. Compressive Modulus. ASTM D 1621, psi, typical: 1,400

i. Complies with ASTM C578, Type: VI

D. TOOLS FOR OPENING VALVES AND BOXES

1. The Contractor shall supply two valve operating rods for operation of each type of product furnished.

E. DRY STEAM VALVE THAWING MACHINE

WATER DISTRIBUTION SYSTEMS 221100- 6

1. The Contractor shall supply (1) dry steam pipe thawing machine including water/steam unit with pressure blow down protection, 50’ braided 3/8” non-restricted delivery hose, 50’ braided ¼” non restricted delivery hose, quick connector couplings, and compatible propane torch.

2. Model: Arctic Blaster and Tiger Torch as manufactured by Arctic Blaster

2.5 END SEALS FOR SLEEVES

A. Design: With ASTM C443 compliant gaskets.

B. Model: Link-Seal, as manufactured by Pipeline Seal & Insulator, Inc. or an approved equal.

2.6 LOCATING WIRE

A. Nonconductive pipe shall have a 10 AWG copper tracer wire with blue PE-30 insulation.

2.7 OPERATION AND MAINTENANCE MANUAL

A. The Contractor shall furnish three sets of instructions for operating and maintaining the complete water system, including location of valves and other key system features, testing requirements for any backflow assemblies, parts list and parts order form, etc.

PART 3 - EXECUTION

3.1 EARTHWORK

A. Refer to Section 312000 “Earthwork” for excavating, trenching, bedding, and backfilling.

3.2 PIPING INSTALLATION

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

B. Stake locations of waterlines as shown on the Drawings. Waterline location shall be approved by the Contracting Officer before installation.

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

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

E. 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 placing in trench. 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 installed in water, and

WATER DISTRIBUTION SYSTEMS 221100- 7

no pipe shall be installed 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 Contracting Officer so that no trench water, rodents, earth, or other substance will enter the pipe or fittings.

F. Any section of pipe already installed and found to be defective shall be removed and replaced with new pipe at the Contractor’s expense.

G. Water and Non-Potable/Sewer Line Crossings

1. Potable and NPWL lines shall never be installed in the same trench.

2. If a new line crosses below an existing line, the existing line shall be supported to prevent settling.

3. Where waterlines intersect NPWLs or are within 10 horizontal feet of NPWLs, the following applies:

a. At least one of the pipes (either the waterline or NPWL) shall be constructed or reconstructed with 200 psi pipe or encased in a continuous sleeve with same rating. At crossing, extend 200 psi pipe or sleeve for a distance of 10 feet perpendicular distance from each side of the waterline. The waterline and NPWL pipes or sleeves shall be centered at the crossing so that the joints will be an equal distance and as far as possible from the crossing.

1) Sleeves: Nominal sleeve diameter to be at least 3 inches larger than nominal diameter of pipe to be encased. Install end seals in annular space at each end of sleeves.

2) In lieu of constructing or reconstructing the NPWL with pipe conforming to waterline requirements, the NPWL may be encased in concrete at least 6 inches thick around the pipe measured at the bell, for 10 feet each side of the waterline.

b. Construct according to applicable federal, state and local regulations which the Contractor is responsible for obtaining and following.

c. Where applicable, state and local regulations supersede the above requirements.

H. Culvert Crossings: Where waterline crosses a road culvert, adjust grade of waterline to provide a minimum of 12 inches of separation between the waterline and culvert, maintaining slope of waterline to drain.

I. A minimum of one-foot separation shall be maintained between electric and waterlines in the same trench. Unless the electric conductors are in conduit the waterline shall be a minimum of one foot below the electric conductors.

J. Cutting and Handling of Pipe

1. 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.

WATER DISTRIBUTION SYSTEMS 221100- 8

K. Laying Pipe

1. No pipe shall be placed in the trench until the Contracting Officer has approved the trench and bedding.

2. Do not drop pipe into trench. Ensure installation procedures meet the manufacturer’s requirements.

3. Pipes shall be placed true to the lines and grades shown on the Drawings and as specified.

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

5. 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.

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

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

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

9. When pipes are installed in a structure or utility box, they shall be adequately supported.

10. Use proper fittings in order to follow the required line and grades and to avoid excessive curvature. 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.

11. When more than one pipeline is in the same trench, the pipes shall be separated by at least eight horizontal inches, or as shown on the Drawings.

12. Bends that result in joint tension or permanent pipe deformation are prohibited.

13. Pipelines may be relocated slightly, if necessary, to avoid existing obstacles.

However, slopes shall be maintained to avoid sags, and mid-line low points.

L. Branch Connections

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

2. Horizontal tees for waterline laterals shall not be permitted. The branch side of tees shall be up when drainage is toward the tee, and down when drainage is away from the tee.

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

M. Pipe Joints

1. Joints shall be made, using jointing materials and applied with the proper accessories, in accordance with the manufacturer's instructions. Completed joints shall be watertight, and capable of passing the required hydrostatic testing. If pipe and fittings are assembled with a lubricant, it must be nontoxic.

2. Dissimilar Joints: Connections between two dissimilar pipes or fittings shall be installed in manner recommended by the pipe manufacturer and approved by the Contracting Officer. Use adapters compatible with both piping materials, outer diameters and system working pressure.

WATER DISTRIBUTION SYSTEMS 221100- 9

3. HDPE Heat-Fusion Joints

a. According to ASTM D 2657 and piping manufacturer's written instructions.

b. The joining method shall be butt fusion method and shall be performed in accordance with the pipe manufacturer's recommendations. Butt fusion equipment used in the joining procedures shall be capable of meeting all conditions recommended by the pipe manufacturer, including but not limited to, temperature requirements, alignment, and fusion pressures.

c. Personnel trained in butt fusion techniques by the manufacturer of the pipe, shall supervise or perform butt fusion operations.

d. Butt fusion shall be performed between pipe ends or pipe ends and fitting and valve outlets, of like outside diameter and wall thickness, SDR or DR. Butt fusion joining between same diameters but unlike wall thickness shall not be permitted. Transitions between unlike wall thickness shall be made with a transition nipple (a short length of the heavier wall pipe with one end machined to the lighter wall) or by mechanical means.

e. Branch connections to the main shall be made with polyethylene fittings, and butt fused.

f. Bent Strap Test: On each day that butt fusions are to be made, perform a “Bent Strap Test.” The first fusion of the day shall be a trial fusion. The trial fusion shall be allowed to cool completely, and then fusion test straps shall be cut out. The test strap shall be 12" (min) or 30 times the wall thickness in length with the fusion in the center, and 1" (min) or 1.5 times the wall thickness in width. Bend the test strap until the ends of the strap touch. If the fusion fails at the joint, a new trial fusion shall be made, cooled completely and tested. Butt fusion of pipe to be installed shall not commence until a trial fusion has passed the bent strap test.

4. Plastic Piping Solvent-Cemented Joints: Clean and dry joining surfaces. Join pipe and fittings according to the following:

a. PVC Pressure Piping: Join schedule number ASTM D 1785, PVC pipe and PVC socket fittings according to ASTM D 2672. Join other-than-schedule-number PVC pipe and socket fittings according to ASTM D 2855.

3.3 IDENTIFICATION

A. According to Section 312000 “Earthwork.”

B. Wrap all buried, non-metallic, nonperforated piping with locating wire.

C. Use detectable warning tape over piping and at outside edges of underground structures.

3.4 VALVE INSTALLATION

A. Valves shall be installed in accordance with manufacturer’s requirements and recommendations and good trade practices.

WATER DISTRIBUTION SYSTEMS 221100- 10

B. Valves shall be installed at the required locations with the joints centered, and valve stems plumb and straight. Valves shall be installed so as to be easily accessible for operation and service. Valves shall be set and joined to pipe and supported, as recommended by the manufacturer or as needed to prevent stress on the valve, fitting, or pipe.

C. Test all valves and appurtenances for proper operating adjustments and settings, and for freedom from vibration, binding, scraping, and other defects.

3.5 HYDROSTATIC TESTING

A. General

1. The Contractor shall conduct pressure and leakage tests on 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 Contracting Officer specifies another pressure. Pneumatic testing will not be allowed.

2. The contractor shall ensure that any appurtenance attached to the pipeline at the time of testing is rated to withstand the pressures that will exist during testing.

3. 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.

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

5. The Contracting Officer shall be present during the testing period.

6. 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.

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

B. Pressure and Leakage Test

1. The test pressure shall:

a. Equal at least 125% of the normal working pressure at the highest elevation of the test but not exceed 160 psi at any point being tested.

b. Not exceed the thrust restraint design pressures.

c. Not vary by more than +/- 5 psi from the established test pressure.

d. Not exceed twice the rated pressure of valves when the test section includes closed valves.

e. Be not less than 100 psi for all piping within buildings.

2. Pressure Test Procedure

a. Equipment: The test pressure shall be applied by means of a pump connected to the pipe in a manner satisfactory to the Contracting Officer.

WATER DISTRIBUTION SYSTEMS 221100- 11

b. Preparation: Fill pipeline 24 hours before testing. Use only potable water.

Each valved section of pipeline shall be slowly filled with water and all air shall be expelled from the pipeline. Apply test pressure to stabilize system.

c. Pressurization:

1) Increase pressure in 50-psig increments and inspect each joint between increments.

2) Hold at test pressure for 1 hour.

3) Decrease to 0 psig.

4) Slowly increase again to test pressure and hold for 1 more hour. If the test pressure cannot be sustained within +/- 5 psi during this time, then the system will be determined to have leakage.

5) Leakage shall be verified by the Contractor and the Contracting Officer.

6) Locate and repair leaking joints with new materials and repeat test until leakage is within allowed limits. All visible leaks are to be repaired regardless of the amount of leakage.

d. Examination: All exposed pipe, fittings, valves, and joints shall be carefully examined. Any cracked or defective pipe, fitting, or valve discovered shall be repaired or replaced by the Contractor at his own expense with new material and the test repeated until satisfactory to the Contracting Officer.

3. Results

a. The Contractor shall furnish a written report to the Contracting Officer 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.

3.6 CLEANING AND DISINFECTION

A. Clean and disinfect water-distribution piping as follows:

1. Purge new water-distribution piping systems and parts of existing systems that have been altered, extended, or repaired before use.

2. Use purging and disinfecting procedure prescribed by authorities having jurisdiction or, if method is not prescribed by authorities having jurisdiction, use procedure described in AWWA C651 or as described below:

a. Flushing Pipelines

1) After the pressure and leakage testing has been completed, all water pipes shall be thoroughly flushed.

2) Flushing shall remove all debris from the pipeline, including HDPE pipe shavings, gravel and any other material that may have accidentally entered the pipeline during construction.

3) Remove all self-closing faucets from hydrants before flushing lines.

Failure to do so will likely clog the internal parts of the faucet.

WATER DISTRIBUTION SYSTEMS 221100- 12

4) Minimum velocities must be obtained in all mainlines, laterals and drainlines.

5) Ensure flushing outlets have adequate drainage and no damage or erosion will occur from the flushing process. Install hoses and/or pipe extensions if necessary.

TABLE 1

Required Flow in Gallons per Minute (GPM) to provide 2.5 feet per second

Flushing Velocity

Nominal Pipe Size (inches)

HDPE

(SDR 11)

1 7 1 ¼ 11 1 ½ 14

b. Requirement of Chlorination

1) Pipelines: After flushing, all new waterlines and repaired portions of, or extensions to, existing waterlines shall be disinfected by chlorination. Chlorination shall provide a minimum of 25 mg/l residual after 24 hours contact in the system. This may be expected with an application of 50 mg/l, although some conditions may require more.

The entire system including the storage tank or spring box shall be filled with the disinfecting solution. All taps, hydrants, and other outlets shall be opened and left open until chlorine is noticeable by odor or testing in the water coming from each. Immediately close taps, hydrants, and other outlets. The chlorinated water shall be retained in the waterlines for at least 24 hours. An alternative of introducing a chlorine solution of 300 mg/l for a period of 3 hours is also approved.

c. Preparation of Disinfecting Mixture: Chlorine-bearing compounds used for disinfection shall comply with ANSI/NSF 60.

1) Calcium hypochlorite must be prepared as a water mixture for introduction into the waterlines. The powder should first be made into a paste and then thinned to either a 1 percent or 5.25 percent chlorine solution.

2) Sodium hypochlorite is already a water mixture.

3) Table 2 gives the amount of chlorine-bearing compound to mix to obtain either a 1 percent or 5.25 percent solution.

4) Table 3 gives the amount of a 1 percent or 5.25 percent solution required to obtain a 50 mg/l solution for various volumes.

5) Table 4 gives the volume of water contained in each 100 feet of pipe of various sizes.

WATER DISTRIBUTION SYSTEMS 221100- 13

TABLE 2

Amount of Chlorine-bearing Compound to Mix to Obtain a 1% or 5.25% Solution

Product 1% Solution 5.25% Solution Amount of Compound

Gallons of Water

Amount of Compound

Gallons of Water

Calcium Hypo-chlorite (65% Cl)

1 pound 7.67 1 pound 1.36

Sodium Hypochlorite (5.25% Cl)

1 gallon 4.25 1 gallon 0

TABLE 3

Amount of Chlorine-Water Solution Required to make 50 mg/l

Chlorine Solution for Various Volumes Volume

(Gallons) 5.25%

Solution 1.00%

Solution 100 1.52 cup 0.50 gal.

500 0.48 gal. 2.50 gal.

1,000 0.95 gal. 5.00 gal.

5,000 4.76 gal. 25.0 gal.

10,000 9.52 gal. 50.0 gal.

50,000 47.6 gal. 250 gal.

100,000 95.2 gal. 500 gal.

TABLE 4

Volume in Gallons per 100 feet of Pipe Type of Pipe

Nominal Pipe Size (inches)

HDPE

(SDR 11)

1 4.6 1 1/4 7.3 1 1/2 9.6

2 15.0

6)

d. Method of Chlorine Application: The preferred method is to fill the storage tank (for a distribution system) or the spring head box (for a supply system) with chlorinated water of the proper strength. The water shall then be released through the outlet lines to the remainder of the system and retained there for the required period of time. If either of these points of application is unavailable, chlorinated water of the proper strength may be added to the beginning of the pipeline extension, or to any valved section of the extension, through a corporation stop installed by the Contractor in the top of the pipe.

Other methods may be approved by the Contracting Officer.

e. Testing of Chlorine Residual: To ascertain the concentration, the chlorine residual shall be measured by the Contracting Officer in accordance with the

WATER DISTRIBUTION SYSTEMS 221100- 14

procedures described in the current edition of “Standard Methods for the Examination of Water and Wastewater,” or AWWA M12, or by using an appropriate high-range chlorine test kit

f. Final Flushing and Testing: Following the retention period, as specified in this Section, all heavily chlorinated water shall be thoroughly flushed from the pipeline until the chlorine concentration in the water leaving any part of the line is no higher than 1 mg/1.

g. Disposal:

1) Heavily chlorinated water shall not be drained directly into streams, rivers, lakes or drainage ditches which lead to surface water.

2) When emptying the lines or tank after the 24-hour period, whether the system has passed or failed, the chlorine solution shall be neutralized before being discharged. Neutralize system by adding sodium thiosulfate to the storage tank in accordance with Table 5 below. Let the sodium thiosulfate sit in the storage tank for 24-hours and then release the water from the tank and flush the system. Residual chlorine at the outlets shall be minimal.

TABLE 5

Amounts of Chemical Required to Neutralize Various Residual Chlorine Concentrations in

1,000 gallons of Water Residual Chlorine Concentration mg/L

Pounds of Sodium Thiosulfate (Na2 S2 O3 – 5H2O)

1 0.012 2 0.024 10 0.12 50 0.60

h. Bacteriological Examination: After the system has been disinfected as specified, but before the new water piping is put to use or connected to existing piping, the Contractor shall test the water for bacteriological contamination from representative points in the system as approved by the Contracting Officer. The coliform organisms shall be tested for presence/absence in accordance with State drinking water regulations. If coliform bacteria are present, testing shall be repeated in accordance with State drinking water regulations. If the report of this examination is unsatisfactory, the system shall be flushed and the disinfection procedure repeated until the results of bacteriological examinations are satisfactory.

END OF SECTION 221100

PLUMBING APPURTENANCES 221103- 1

CORDOVA WORK CENTER WATER SYSTEM UPGRADES

SECTION 221103 - PLUMBING APPURTENANCES

PART 1 - GENERAL

1.1 SUMMARY

A. This section includes piping, fittings, valves, gauges, backflow preventers, and other plumbing devices within buildings, utiltity boxes, service connection assemblies, and other designated locations.

B. Related sections include the following:

1. Section 221100 “Water Distribution Systems.”

1.2 SUBMITTALS

A. Product Data: For the following:

1. Backflow preventers and assemblies.

2. Water meters and registers

3. Water meter system remote data logger

4. Conductors

5. Pipe supports

B. Operation and Maintenance Data: To be used in emergency, operation, and maintenance manuals. Include the data for the following:

1. Backflow preventers.

2. Water meters

1.3 MINIMUM SYSTEM REQUIREMENTS

A. Unless otherwise noted, the minimum working pressure for piping and specialty valves and devices shall be 160 psig.

1.4 Q UALITY ASSURANCE

A. NSF Compliance:

1. All products in contact with potable water shall comply with NSF 61 Annex G. All pipes, fittings, fixtures, solder and flux shall meet the 0.25% maximum lead content rules for all wetted components.

1.5 MEASUREMENT AND PAYMENT

A. Payment will be as listed for the following items:

PLUMBING APPURTENANCES 221103- 2

1. Reduced Pressure Backflow Assembly

2. Service Connection Assembly

PART 2 - PRODUCTS

2.1 GENERAL

A. All plumbing appurtenances shall be new and unused, of the type, pressure rating or class, and size specified and as show on the Drawings.

2.2 MAIN JUNCTION AND SERVICE CONNECTION GLOBE VALVE

A. Description: Threaded, 150 psi, union bonnet, renewable composition disc with integral seat, with bronze body.

B. Model: Powell Class 150 as manufactured by Wm. Powell Company, or No. 7, as manufactured by the Crane Company, Chicago, or an approved equal.

2.3 SERVICE CONNECTION CHECK VALVE

A. Description: Bronze, AWWA C508, swing-check type with 125-psig working-pressure rating, threaded ends, screwed-in cap, renewable brass disc and resilient seat. Include interior coating according to AWWA C550 and ends to match piping.

B. Model: Figure No. 578 as manufactured by Powell Company, or an approved equal.

2.4 UNION

A. Description: Female type, malleable iron, 150 pound, with ground brass to iron seat.

B. Model: Manufactured by Crane Company, or an approved equal.

2.5 WYE-STRAINER

A. Description: 125 psi minimum working pressure, semi-steel or bronze body with threaded ends, with brass plug in blow-off connection and removable stainless steel #30 mesh screen.

B. Model: Style B or F, as manufactured by O. C. Keckley Company, or Model: P/N LF777S, as manufactured by Watts Regulator Company, or an approved equal.

2.6 WATER METER AND REGISTER

A. Description: Lead free main case made from high-copper alloy, NSF/ANSI 372 certified and NSF/ANSI 61 compliant, lifetime guarantee, resists internal pressure stresses and

PLUMBING APPURTENANCES 221103- 3

external damage, handles in-line piping variations and stresses, positive displacement nutating disk chamber. Operating range ½ to 20 gpm at 5/8” meter size and 1 to 50 gpm at 1” meter size. Unit of measure US gallons. Register shall be compatible with meter maincase, have 10 gallon per pulse switch closure, rugged thermoplastic encasement, dry contact electronic pulse output reed switch technology, large easy to read numerals, monitoring capability permiting register locations up to 1,000 feet from controller.

B. Model: T-10 water meter and TRICON/S register as manufactured by Neptune Technology Group, or an approved equal.

2.7 WATER METER SYSTEM CONDUCTOR

A. Description: Rated CM, 2-22 AWG stranded tinned copper conductors with PVC insulation, waterblocking tape, PVC jacket and ripcord. Suitable for wet, underground installations.

B. Model: 5500F1 2 Conductor Waterblockes Cable as manufactured by Belden, or approved equal.

2.8 WATER METER INSULATION

A. Provide insulation in the form of a water meter jacket. Custom molded to fit project meter from expanded polystyrene EPS, or approved equal.

2.9 WATER METERING REMOTE DATA LOGGER

A. Description: Data logger with built in web server, flash memory local data storageUSB, data storage, remote data storage via email, remote real time display, four pulse input programmable channels, four alarm channels, time stamping, 20 programmable sampling intervals, built in Ethernet interface.

B. Model: DI-808 with 4 GB memory as manufactured by DATAQ Instruments or approved equal

2.10 BACKFLOW PREVENTER

A. General: ASSE 1013 standard, backflow preventers.

1. Working Pressure: 150 psig minimum, unless otherwise indicated.

2. NPS 2 and Smaller: Unleaded bronze body with threaded ends. Interior

Components: Corrosion-resistant materials.

3. Strainer: On inlet, if indicated.

B. Reduced-Pressure-Principle Backflow Preventers: AWWA C511, suitable for continuous pressure application. The assembly shall consist of an internal pressure differential relief valve located in a zone between two positive seating check modules with captured springs and silicone seat discs. Seats and seat discs shall be replaceable in both check modules and the relief valve. There shall be no threads or screws in the waterway exposed to line fluids. Service of all internal components shall be through a single access cover secured with stainless steel bolts. Body and shutoffs shall be

PLUMBING APPURTENANCES 221103- 4

constructed using Lead Free* cast copper silicon alloy materials. Lead Free* reduced pressure zone assembly shall comply with state codes and standards, where applicable, requiring reduced lead content. The assembly shall also include union connections, two resilient seated isolation valves, four resilient seated test cocks and an air gap drain fitting.

The assembly shall meet the requirements of: USC; CSA B64.4.

1. Maximum Pressure Loss: 12 psig through middle 1/3 of flow range.

C. Available Manufacturers:

1. Series LFU009M(2)QT-S as manufactured by Watts Industries, Inc.; Water Products Div., or approved equal.

2.11 BACKFLOW PREVENTER FROST PROTECTION:

A. Available manufacturers:

1. WG blankets with minimum R value 38 as manufactured Weatherguard sized as necessary to fit assembly, or approved equal.

2.12 PIPE AND FITTINGS

A. HDPE (For all new piping):

1. Pipe, AWWA C901:

a. Material Designation: PE 4710 resin

b. Material Classification: ASTM D1248

c. Minimum Cell Classification: ASTM D 3350, 445574C

d. Dimension Ratio and Minimum Pressure Rating: DR11, 160 psig

e. NSF-61 Listed

2. Fittings:

a. Molded HDPE Fittings: ASTM D 3350, PE 4710 resin, butt-fusion type, made to match HDPE pipe dimensions and class.

b. Insert Fittings: Not allowed.

c. Transition Fittings to non-HDPE Pipe: Approved by HDPE pipe manufacturer. Compression-type fittings are not allowed.

d. HDPE transitions to copper line shall be welded/threaded, AWWA 800-89 and NSF 61 certified, manufactured to D1599, D1598, and F-714, Series 911 Adaptor as manufactured by Poly-Cam, Inc OR approved equal

B. SERVICE CONNECTION FROST PROTECTION

1. Any above ground piping (within valve boxes and crawlspaces) shall be wrapped with 2” (wall thickness), R value 12.6 minimum, flexible, closed-cell elastomeric tube insulation product.

2. Available products: Insul-Tube as manufactured by K-Flex USA, or approved equal.

PLUMBIN…