Attachment_1_1_-_00_00_01A_NGWSP_BLK_2-3_Specifications_05192026_0002.pdf

Navajo-Gallup Water Supply Project 140R4026B0001

San Juan Lateral – Block 2-3 Pipeline Solicitation No.

Protection of Existing Utilities

01 56 15 - 1

SECTION 01 56 15

PROTECTION OF EXISTING UTILITIES

PART 1 GENERAL

1.01 MEASUREMENT AND PAYMENT

A. Utility Crossing Investigations Reach 2:

1. Payment: Lump-sum price offered in Price Schedule 1.

B. Utility Crossing Investigations Reach 3:

1. Payment: Lump-sum price offered in Price Schedule 2.

C. Cost: Include in prices offered in Price Schedules for other items of work, except for

Utility Crossing Investigations.

1.02 REFERENCE STANDARDS

A. Bureau of Reclamation (Reclamation)

1. RSHS Reclamation Safety and Health Standards, including revisions, available at https://www.usbr.gov/safety/rshs/index.html

B. Institute of Electrical and Electronics Engineers (IEEE)

1. IEEE C2-2023 National Electrical Safety Code (NESC)

1.03 SUBMITTALS

A. Submit in accordance with Section 01 33 00 – Submittals.

B. RSN 01 56 15-1, Utility Owner Acknowledgement:

1. Copy of notification acknowledgement showing underground and overhead utility agreements.

C. RSN 01 56 15-2, Utility Crossing Investigation:

1. Include the following for each utility line as applicable:

a. Owner company name, address, and telephone number.

b. Utility line crossing location.

c. Utility line or item material.

d. Elevation.

e. Diameter.

https://www.usbr.gov/safety/rshs/index.html

01 56 15 - 2

f. Service restrictions.

g. Powerline voltage.

D. RSN 01 56 15-3, Work Plan within Utility Easements:

1. Proposed installation method including construction equipment.

2. Methods for protecting.

3. Approval of work plan from Utility owner.

1.04 PROJECT CONDITIONS

A. Drawings included in these specifications show existing utilities but may not show all utilities existing at jobsite.

B. Unknown existing utility lines may cross pipeline alignment.

C. Government does not represent that location of known existing utilities shown on drawings are exact. It is Contractor’s responsibility to determine actual location of and make provision for all known and unknown utilities:

1. Verify locations, depths, and clearances of both above and below ground utilities prior to excavation.

D. Ensure that each utility line is in service as required by each utility owner.

E. Coordinate work within existing pipeline and transmission line Rights-of-Way with all utility owners. Contractors shall comply with all Utility owner crossing requirements and shall be responsible for all costs associated with utility crossings. Obtain permission from utility owners before procuring materials to be installed in Right-of-Way.

PART 2 PRODUCTS

Not Used

PART 3 EXECUTION

3.01 GENERAL

A. Have New Mexico One Call 811 locate utilities before doing underground work.

1. New Mexico 811

1021 Eubank Blvd NE

Albuquerque, NM 87112 www.nm811.org

Statewide: Dial 811 or 800-321-ALERT (2537) during regular business hours.

By Web: Request a Line Spot 24-hours a day.

http://www.nm811.org/

01 56 15 - 3

2. Navajo Tribal Utility Authority (NTUA)

Shiprock District

PO Box 1749, Shiprock, NM 87420

Telephone: 928-729-5721

B. Utility Crossing Investigation:

1. Determine height and voltage of overhead utility lines. Clearances in accordance with RSHS and OSHA, whichever is more stringent.

2. Determine location, elevations, diameters, and materials of each underground utility line by potholing or test pits or as approved by utility owners.

3. Obtain permission from utility owner before performing physical utility investigation (potholing or test pits).

4. Reference notes on drawings.

C. Notify impacted property owner at least 2 working days before disturbing waterline that serves their property. Water service to property shall not be shut off for more than 8 hours.

D. No excavation will be permitted within 10 feet of gas lines when in service without written approval from Gas Company.

E. Protect and support existing utilities that intersect work area. Before commencing work, obtain approval and necessary permits from utility owners within project ROW:

1. Protect overhead power facilities as required by utility owner if working in their

ROW.

2. Protect existing waterlines as required by utility owner when working within 100 feet of their lines.

F. For abandoned electric and water lines near Shumway Arroyo on Reach 2, contact power and water companies to turn off lines prior to work.

G. Repair existing utilities damaged during construction as approved by COR and utility owner.

3.02 CLEARANCE

A. Obtain clearances required for construction operations; provide in accordance with RSHS and IEEE C2.

B. Contractor to coordinate de-energizing the power transmission line or provide additional poles with NTUA to meet required clearance for construction.

01 56 15 - 4

3.03 INTERFERENCE WITH OPERATION OR MAINTENANCE

A. Do not interfere with operation or maintenance service on utilities, existing on date offers are received:

1. Provide for access to utilities in a manner satisfactory to owners and operators and

Government.

B. Provide required temporary structures; make necessary repairs, replacements, or similar operations; and furnish indemnity or other bonds.

C. Do not cross, park or travel along utility ROW without written permission from utility owner:

1. Permission shall be obtained by Contractor.

2. If permit(s) are required, Contractor shall include Government as permittee.

END OF SECTION

Protected Species

01 57 60 - 1

SECTION 01 57 60

PROTECTED SPECIES

PART 1 GENERAL

1.01 MEASUREMENT AND PAYMENT

A. Cost:

1. Include in prices offered in Price Schedules for other items of work.

1.02 PROJECT CONDITIONS

A. Certain native plant and animal species in the State of New Mexico are protected under

Federal, State and Tribal laws. Government has ascertained that protected species and/or their habitats may exist in the areas to be disturbed by construction activities. These species include, but may not be limited to, the following:

1. Migratory Birds.

2. Burrowing Owl.

3. Ferruginous Hawk.

4. Prairie Dog.

5. Kit Fox.

6. Mesa Verde Cactus.

7. Raptors.

B. Federal legislation provides for protection of Threatened and Endangered Species, which might otherwise be lost due to alteration of terrain as a result of any Federal construction projects.

C. Project is designed to comply with Environment Commitments of Navajo-Gallup Water

Supply Project Final Environmental Impact Statement, Realignment of the Northern

Portion of the San Juan Lateral Environmental Assessment, and Final Biological Opinion for the Navajo-Gallup Water Supply Project reissued by U.S. Fish and Wildlife Service on September 20, 2022.

D. Insert this section in subcontracts.

E. In accordance with Federal, State, and Tribal Law, Government may arrange for removal of protected species.

1. Cooperate with those performing such removal.

2. If these species are not removed, cooperate with and abide by protection plans developed by appropriate Federal, State, and Tribal entities to avoid damage to or disturbance of protected species.

01 57 60 - 2

F. Persons who, without permission contribute to the take of threatened and endangered species are subject to arrest and penalty of United States, Navajo Nation, and New

Mexico laws.

1. Take: to harass, harm, pursue, hunt, shoot, wound, kill, trap, capture or collect, or to attempt to engage in any such conduct.

2. Harm: includes significant habitat modification or degradation that results in death or injury to listed species by significantly impairing essential behavioral patterns, including breeding, feeding, or sheltering.

3. Harass: intentional or negligent actions that create the likelihood of injury to listed species to such an extent as to significantly disrupt normal behavior patterns which include, but are not limited to, breeding, feeding or sheltering.

4. Incidental take: take that is incidental to, and not the purpose of, the carrying out of an otherwise lawful activity.

5. Offenders will be subject to United States, Navajo Nation, and New Mexico environmental protection laws and civil penalties.

G. Immediately notify COR if protected species listed above are disturbed. Include written account, map, extent of disturbance, number of impacted species, and circumstances.

COR will coordinate notifications to USFWS and Navajo Nation.

1.03 SPECIAL REQUIREMENTS

A. Migratory Birds

1. Nesting may occur in area between March 15th and August 15th.

2. Government will survey for nesting birds in vegetated areas to be disturbed.

Evaluation shall be performed no more than 5 days prior to area disturbance.

3. Notify OGR 10 days before disturbing an area.

4. Do not disturb a nesting pair of birds with eggs.

5. Avoid birds and modify construction activities as directed by COR.

B. Mesa Verde Cactus

1. Mesa Verde Cactus is found directly adjacent to construction areas.

a. Government will monitor work in these areas.

b. Coordinate work with COR and OGR.

c. Government will conduct preconstruction surveys for Mesa Verde Cactus.

Evaluation shall be performed in blooming season in the year prior to construction.

1) Blooming may occur from April to May.

d. Notify OGR before a minimum of 14 days prior to disturbing an area to complete spring surveys.

01 57 60 - 3

1) Do not disturb potential Mesa Verde Cactus habitat prior to preconstruction surveys.

2) Modify construction activities as directed by COR.

e. Onsite Contractor personnel shall complete Mesa Verde Cactus awareness training prior to working in project area.

1) Government will provide training to inform onsite personnel of environmental requirements and expectations.

2) Training session will occur during preconstruction meeting or other mutually agreed upon time before initial groundbreaking takes place.

a) Duration: Approximately 1 hour.

b) Training will be recorded, and a digital copy of Mesa

Verde Cactus awareness training will be provided to

Contractor

3) Require onsite personnel to complete required Mesa Verde Cactus awareness training before being allowed to work in project area.

4) Maintain training records

5) Onsite personnel added after completion of Government-provided training session shall view digital copy of training before being allowed to work in project area.

6) The Contractor shall adhere to all requirements outlined in the

Mesa Verde Cactus Education and Awareness training, which will include requirements Reclamation develops developed in coordination with the United States Fish and Wildlife Service

(FWS) during preparation of the Mesa Verde Cactus Construction

Plan, including required buffer areas.

a) Construction Plan is a required Conservation Measure of the FWS’s 2022 Final Re-issued Biological Opinion, No, 2-

22-01-F-532.

C. Raptors:

1. Raptor nesting may occur in the area from January 15th to July 15th:

a. Minimize disturbance to raptors. Government will conduct raptor surveys prior to construction that is to begin between January 15th and July 15th.

Evaluation shall be performed no more than 5 days prior to area disturbance. The survey will include all potential nesting habitat within specified buffer distances (0.25-mile to 0.625-mile, depending on the species) of the construction right- of-way.

2. Notify COR 10 days prior to construction to allow for raptor nest surveys.

3. Do not disturb an active raptor nest:

01 57 60 - 4

a. Government will notify Contractor of nest locations.

b. No construction will be allowed within the above months within 0.25-mile to 0.625-mile of active nests, depending on the species.

4. Raptor Safe Utility Poles:

a. All above ground utility poles shall conform to a design standard(s) that comply with the Raptor Electrocution Prevention Regulations RCS-43-08 published September 10, 2008. This is to avoid unintentional electrocution of raptors that may perch on the utility pole.

D. Ferruginous Hawk

1. Nesting may occur in the area from March 1st to July 31st.

a. Government will conduct pre-construction surveys for nesting hawks in areas to be disturbed within 1.0 km (0.62 miles) of suitable nesting habitat during species breeding and chick reading seasons (March 1st to July 31st, of any year). Evaluations shall be performed no more than 5 days before an area is disturbed.

b. Notify COR 10 days before disturbing an area.

c. Do not disturb nesting birds within buffers established by Navajo Nation

Department of Fish and Wildlife.

1) Avoid hawks and modify construction activities as directed by

COR.

E. Burrowing Owl

1. Nesting may occur in the area from March 1st to August 31st.

a. Government will survey for burrowing owls if any work is proposed during the species’ active season (March 1st to August 31st, of any given year). Surveys shall occur within 0.4 km (1/4 mile) of the project location and follow appropriate protocols.

1) If burrowing owl(s) are found during survey, no surface work shall occur within ¼ mile of the active nest until after the nesting period

(March 1st -August 15th); additionally, no habitat alteration is allowed year-round within 0.2 km of nest site.

2) If burrowing owls are found that impact the contractor’s work, a contract modification may be issued.

b. Notify COR 10 days before disturbing an area.

c. Do not disturb nesting owls within buffers established by Navajo Nation

Department of Fish and Wildlife.

F. Kit Fox

1. Active Kit fox den sites may occur in the project area.

01 57 60 - 5

a. Government will survey for kit fox den sites in areas disturbed.

b. Notify COR 30 days before disturbing an area.

c. Do not disturb kit fox den sites during breeding and reproduction season

(December 1st to August 1st) within buffers established by Navajo Nation

Department of Fish and Wildlife (0.2 km or 1/8 mile).

1) Avoid kit fox den site and modify construction activities as directed by COR.

G. Prairie Dogs

1. Active prairie dog colonies may be present in portions of the project area.

a. Government will survey for prairie dogs in these project areas if any work is proposed in the species’ breeding and reproduction season (March 1st to

June 1st).

b. Notify COR 30 days before disturbing an area.

2. Do not disturb prairie dogs during breeding and reproduction season.

a. Breeding and reproduction may occur from March 1st to June 1st.

b. Avoid breeding prairie dogs and modify construction activities as directed by COR.

1.04 REPLACEMENT PLANTS

A. Protected plant species shall not be removed or damaged by Contractor.

1. If inadvertent effects occur to protected species during construction:

a. Notify COR:

1) Verbal: Within 2 hours.

2) Written: Within 24 hours.

b. Cease work in affected work area until consultation commitments are completed.

2. Government, in consultation with Bureau of Indian Affairs (BIA) and State of

New Mexico, will manage required removal/replacement planting in accordance with consultation commitments.

3. Replacement numbers/ratio in accordance with consultation commitments.

1.05 DISCOVERY OF RESOURCES

A. When Contractor or parties operating or associated with Contractor, in performance of this contract discover threatened and endangered species on ROW:

1. Immediately cease work within 50 feet of discovery location.

01 57 60 - 6

a. Place temporary safety fence in accordance with 01 56 32 –Temporary

Safety fence to prevent disturbance until biologist can investigate to avoid inadvertent disturbance by construction activities.

2. Verbally notify CO and OGR within 2 hours, giving location, extent of the disturbance, number of cacti, and nature of findings.

a. Follow with written confirmation to CO within 12 hours, to include a map of the disturbed area.

3. Verbally notify Reclamation staff biologist within 2 hours.

a. Name of assigned staff biologist and telephone number will be provided at preconstruction meeting.

B. Do not disturb or damage threatened and endangered species discovered during construction activities. Provide cooperation and assistance to preserve findings for removal or other disposition by CO.

C. Government, in consultation with appropriate regulatory agencies upon discovery of threatened and endangered species, will manage required removal/replacement planting in accordance with consultation commitments.

1. When discovery mitigation has been completed, CO will notify Contractor that work can resume in discovery area.

2. Do not resume work in area of discovery until receipt of written notice to proceed from CO.

D. Where appropriate by reason of discovery, CO may order delays in time of performance or changes in work or both. When such delays or changes are ordered, an equitable adjustment will be made in the contract in accordance with applicable clauses of the contract.

PART 2 PRODUCTS

Not Used

PART 3 EXECUTION

3.01 MESA VERDE CACTUS MONITORING AREA

A. See Section 01 14 12 – Work Restriction and Limitations for access to north and west sides of Road 6800.

B. Provide 30-day notice to OGR prior to approaching or entering the Mesa Verde Cactus

Monitoring Area (Road 6800) for pre-construction activities.

01 57 60 - 7

1. Coordinate with the Government for a biological monitor for new ground disturbing construction activities along the Shumway Arroyo HDD or other areas as directed by COR.

C. Install and maintain approximately 1,555 1,355 feet of fence from Station 2052+45 to

2068+00 prior to disturbing these areas.

1. Fence shall be installed and remain in place for the duration of the contract.

2. Government Biologist will be on site during fence installation

a. COR will coordinate Government Biologist attendance.

b. Notify COR 7 days prior to fence installation.

3. Fence will be built of materials that will not draw attention to the sensitive area and shall be simple t-post and wire. Refer to wire safety fence in Section 01 56 32

– Temporary Safety Fence.

4. Government may direct Contractor to remove fence prior to completion of the project.

a. Government Biologist will be on site during fence removal.

5. Notify COR 28 days prior to project completion for direction from the government.

6. When construction is complete, temporary access roads and staging areas within the Mesa Verde Cactus Monitoring Area shall be closed and hand-ranked to remove tire tracks.

D. Provide 48-hour notice to OGR prior to approaching or entering the Mesa Verde Cactus

Monitoring Area (Road 6800) for construction activities.

1. Coordinate with the Government for a biological monitor for new ground disturbing construction activities along the Shumway Arroyo or other areas as directed by COR.

E. Cleaning Construction Equipment:

1. If within Mesa Verde Cactus Monitoring Area, follow cleaning protocols outlined in the Mesa Verde Cactus Construction Plan.

01 57 60 - 8

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Soil-Applied Herbicide

31 31 30 - 1

SECTION 31 31 30

SOIL-APPLIED HERBICIDE

PART 1 GENERAL

1.01 MEASUREMENT AND PAYMENT

A. Cost:

1. Include in prices offered in Price Schedules for Gravel Surfacing.

1.02 SUBMITTALS

A. Submit the following in accordance with Section 01 33 00 – Submittals.

B. RSN 31 31 30-1, Use Plan.

C. RSN 31 31 30-2, Applicator Certification.

1.03 QUALIFICATIONS

A. Applicators: Certified by appropriate Federal, State, Tribal, or local agencies, as required.

1.04 REGULATORY REQUIREMENTS

A. Comply with label directions, and applicable EPA, Federal, State, Tribal, or local laws and regulations.

PART 2 PRODUCTS

2.01 HERBICIDES

A. Label: EPA (Environmental Protection Agency) pesticide registration number.

B. Provide soil-applied herbicide conforming to one of the following:

1. Atrazine:

a. Composed of a finely divided, wettable powder containing a minimum of

80 percent chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine and related compounds.

b. Mix: Minimum of 2 gallons of water per pound of dry product.

2. Bromacil:

a. Composed of a finely divided, wettable powder containing a minimum of

80 percent bromo-3-sec-butyl-6-methyluracil.

Soil-Applied Herbicide

31 31 30 - 2

b. Mix: Minimum of 2 gallons of water per pound of dry product.

3. Prometon:

a. Composed of a liquid emulsifiable solution containing a minimum of

25 percent 2-methoxy-4, 6-bis isopropylamino-s-triazine.

b. Mix with water:

1) For small areas, add sufficient water to provide thorough and uniform coverage.

2) For large areas, add concentrate to 100 gallons of water per acre.

4. Commercial mixtures meeting requirements may be used.

PART 3 EXECUTION

3.01 PREPARATION

A. Apply herbicide after gravel surfacing has been placed.

3.02 APPLICATION

A. Apply herbicide to gravel surfacing placed under this section as directed by COR.

1. Select one herbicide from those specified.

2. Apply soil-applied herbicide at following rate:

a. Atrazine: Equivalent of 0.035 pound of dry product per 100 square feet

(about 15 pounds per acre).

b. Bromacil: Equivalent of 0.035 pound of dry product per 100 square feet

(about 15 pounds per acre).

c. Prometone: Equivalent of 0.017 gallon of herbicide concentrate per

100 square feet (about 7 1/2-gallons per acre).

B. Apply herbicide only with approval of COR.

1. If herbicide is within Mesa Verde Cactus Monitoring Area (Road 6800), verify application with Government Biologist prior to placement.

C. Apply uniformly.

D. During application, continuously agitate suspension.

Seeding

32 92 20 - 1

SECTION 32 92 20

SEEDING

PART 1 GENERAL

1.01 MEASUREMENT AND PAYMENT

A. Seeding:

1. Measurement: Area of surface disturbance seeded, or as determined by OGR.

2. Payment: Acre price offered in Price Schedules.

1.02 DEFINITIONS

A. Pure live seed content: Weight of seed times percent purity times percent germination.

1.03 SUBMITTALS

A. Submit the following in accordance with Section 01 33 00 – Submittals.

B. RSN 32 92 20-1, Seeding Plan:

1. Method and equipment used for seeding.

2. Date for seeding.

3. Mulch type and application equipment.

4. Qualifying experience of person responsible for supervision of seeding, and approval.

5. Names, addresses, and telephone numbers of references.

6. Name and address of seed suppliers.

C. RSN 32 92 20-2, Certifications:

1. Origin of seed.

2. Percent purity and germination.

3. Prohibited and restricted weed seed content.

1.04 DELIVERY STORAGE AND HANDLING

A. Seed Containers:

1. Sealed.

2. Labeled:

a. Identify seed origin on label:

32 92 20 - 2

1) Intrastate shipping: In accordance with New Mexico State Seed

Laws and Regulations.

2) Interstate shipping: In accordance with U.S. Department of

Agriculture Rules and Regulations under the Federal Seed Act.

1.05 AMBIENT CONDITIONS

A. Do not seed when ambient temperature is below 38 degrees F without approval of OGR.

B. Do not seed when ground is snow covered or frozen.

C. Do not seed, mulch, or hydroseed when wind velocities prevent uniform application of materials or would drift materials.

PART 2 PRODUCTS

2.01 SEED

A. Weed seeds classified by State Seed Department:

1. Prohibited noxious weeds: None allowed.

2. Restricted noxious weeds: 0.5 percent maximum by weight.

B. Seed Mixture:

1. Purity, minimum: 85 percent.

2. Germination, minimum: 85 percent.

a. Germination test: Less than 1-year old at time of seeding.

3. Uniform mixture shown in Table 32 92 20A – Seed Mixture.

4. Uniform mixture shown in Table 32 92 20B – Secondary Seed Mixture for Mesa

Verde Cactus Habitat Area from Station 2163+00 to Station 2052+00 or as directed by COR.

5. Seed in accordance with Section 51 00 35 – Site Specific Revegetation Plan for

Navajo-Gallup Water Supply Project and this section.

Table 32 92 20A – Seed Mixture

Common Name Scientific Name Cultivar

Seeding Rate

(Pounds pure live seed per acre)

Sterile triticale Triticum aestivum

X Secale cereale

‘Quickguard’

VNS 2.0

Fourwing saltbush

Atriplex canescens VNS 3.0

32 92 20 - 3

Shadscale

Winterfat Krascheninnikovia lanata

VNS 2.0

Indian ricegrass Achnatherum hymenoides

Paloma or Rimrock 3.0

Western wheatgrass Pascopyrum smithii Arriba 2.0

Galleta Pleuraphis jamesii Viva or Florets 2.0

Purple threeawn Aristida purpurea VNS 2.0

Sand dropseed Sporobolus cryptandrus

VNS 0.25

Alkali sacaton Sporobolus airoides VNS 0.25

Scarlet globemallow Sphaeralcea coccinea

VNS 0.25

Narrowleaf penstemon Penstemon angustifolius

VNS 0.25

Rocky Mountain beeplant Cleome serrulata VNS 0.25

Hairy false goldenaster Heterotheca villosa VNS 0.25

Shadscale Krascheninnikovia lanata

VNS 2.0

Table 32 92 20B – Secondary Seed Mixture for Mesa Verde Cactus Habitat

Common Name Scientific Name Cultivar Season Form

Seeding

Rate*

(Pounds pure live seed per acre)

Mat saltbush Atriplex corrugata VNS - Shrub 2.0

Winterfat Krascheninnikovi a lanata

VNS Cool Subshrub 2.0

Shadscale saltbush

Atriplex confertifolia

VNS Cool Subshrub 2.0

Indian ricegrass Achnatherum hymenoides

Paloma or

Rimrock

Cool Bunch 2.0

Galleta Pleuraphis jamesii Viva or florets

Warm Bunch/Sod 2.0

Blue grama Bouteloua gracilis Alma or

Hachita

Warm Sod 2.0

Purple threeawn Aristida purpurea VNS Warm Bunch 2.0

Sand dropseed Sporobolus cryptandrus

VNS Warm Bunch 0.25

Scarlet globemallow

Sphaeralcea coccinea

VNS Warm Forb 0.25

Narrowleaf penstemon

Penstemon angustifolius

VNS Cool Forb 0.25

32 92 20 - 4

Rocky Mountain beeplant

Cleome serrulata VNS Warm Forb 0.25

Sand verbena Abronia villosa VNS Warm Forb 0.50

* Based on 60 pure live seeds (PLS) per square foot, drill seeded. Double this rate (120 PLS per square foot) if broadcast or hydroseeded.

2.02 STRAW MULCH

A. Wheat or barley straw.

B. Free of mold or other evidence of decomposition.

C. Free from weed seed.

2.03 HYDROMULCH

A. Mat-Fiber Plus, manufactured by Mat Inc.,12402 Hwy 2, Floodwood, MN 55736, 1 888 477-3028; Spray Mulch X-80 manufactured by Pacific Wood Fibers, PO Box 2109, Redmond WA 98052; or equal, having the following essential characteristics:

1. Wood cellulose fiber.

2. No germination or growth inhibiting factors.

3. Dyed appropriate color to allow visual metering of application.

4. Evenly dispersed and suspended when agitated in water.

5. Forms blotter like ground cover that readily absorbs water and allows infiltration to underlying soil.

2.04 TACKIFIER

A. Mixture of at least three specially blended compatible hydrocolloids:

1. One hydrocolloid will act as a slippery agent during suspension.

2. Will form loose, long-chain-like film on drying

3. No growth or germination inhibiting factors.

4. Hydrates and disperses in circulating water to form homogeneous slurry.

5. Equilibrium air dry moisture content at time of manufacture of 8 percent, ±2 percent.

6. Minimum water holding capacity: 6 1/2 times weight of dry material.

32 92 20 - 5

PART 3 EXECUTION

3.01 SEEDBED PREPARATION

A. Complete prior to seeding, and mulching or hydromulching:

1. Rip, till, and disc compacted areas to create suitable medium for reseeding prior to spreading topsoil.

2. Respread topsoil and scarify or harrow and rake topsoil to minimum depth of

3-inches.

3. Remove stiff clods, lumps, roots, litter, stones, and other foreign material greater than 6-inches in size from surface.

4. Dispose of removed materials in accordance with Section 01 74 00 – Cleaning and Waste Management.

5. Fill or smooth topsoil surface to remove rills, gullies, and depressions.

6. Protect prepared topsoil surfaces from erosion and washouts. Repair damaged surfaces as required.

3.02 SEEDING APPLICATION

A. Seeding in Project Areas:

1. Apply seed and mulch by one of the following methods:

a. Broadcast seeding followed by mulching or hydromulching.

b. Drilling seed followed by mulching or hydromulching.

c. Hydroseeding.

2. Apply seed mixture at rate specified in applicable Table 32 92 20A – Seed

Mixture. Double rate of seed application if broadcast seeding.

3. Seed between July 15 and November 15.

B. Seeding Under Erosion Control Blanket:

1. Prior to placing erosion control blankets apply seed mixture at rate specified in

Table 32 92 20A – Seed Mixture. Double rate of seed application if broadcast seeding.

2. Seed between July 15 and November 15.

3.03 BROADCAST SEEDING

A. Broadcast seed only in areas not accessible for drilling or hydroseeding.

B. Mechanical Broadcasting:

1. Equipment: Centrifugal type.

2. Designed and regulated to apply seed uniformly at proper rate per acre.

32 92 20 - 6

C. Hand Broadcasting:

1. By hand broadcaster.

2. By hand.

3. Uniformly applied.

D. Cover seed with soil to depth of 1/4-inch to 1/2-inch immediately after broadcasting:

1. Use hand rake or float.

2. Do not use log chain or similar devices.

3.04 DRILLING SEED

A. Drill:

1. Disc-type seed drill.

2. Space rows 1-foot or less apart.

3. Perform on contour, perpendicular to slopes to minimize runoff, rilling, and erosion.

B. Regulate drill to uniformly distribute seed at rate specified in Table 32 92 20A – Seed

Mixture and at proper seed depth:

1. Smaller seed depth: 1/4- to 1/2-inch.

2. Larger seed depth: 1- to 2-inches.

3.05 MULCHING

A. Certified weed-free straw or native grass hay.

B. Spread and crimp within 24-hours of seeding.

C. Rate: 1 to 2 tons/acre uniformly spread

D. Anchor with threader:

1. Operate crosswise to slope.

2. Depth: 3- to 4-inches.

3. Interval: 6- to 12-inches across slope.

3.06 HYDROSEEDING AND HYDROMULCHING

A. Slurry:

1. Mix to keep homogeneous.

2. Ingredients:

a. Water.

32 92 20 - 7

b. Tackifier.

c. Seed.

d. Wood cellulose fiber mulch:

1) Rate: 4,000 pounds per acre at 10 percent moisture content.

2) Add to water slurry after seed.

3. Maximum time between batching slurry and application: 1-hour.

B. Spray apply slurry mix uniformly.

C. Use mulch coloring as metering agent.

32 92 20 - 8

Steel Line Pipe

Revised - 33 11 12 - 1

SECTION 33 11 12

STEEL LINE PIPE

PART 1 GENERAL

1.01 MEASUREMENT AND PAYMENT

A. Cost:

1. Include cost of furnishing and installing steel line pipe in prices offered in Price

Schedules for Pipeline General Requirements.

a. Does not include pipe specified in Section 33 21 95 – Metal Piping for

Line Pipe Installations.

1.02 REFERENCE STANDARDS

A. ASTM International (ASTM)

1. ASTM A139/A139M-16 Electric-Fusion (Arc) - Welded Steel Pipe

(NPS 4 and Over)

2. ASTM A283/A283M-18 Low and Intermediate Tensile Strength

Carbon Steel Plates

3. ASTM A1011/A1011M-15 Steel, Sheet and Strip, Hot-Rolled, Carbon, Structural, High-Strength Low-Allow and

High-Strength Low-Allow with Improved

Formability

4. ASTM A1018/A1018M-16a5 Steel, Sheet and Strip, Heavy Thickness

Coils, Hot Rolled, Carbon, Structural, High-

Strength Low-Alloy, Columbium or

Vanadium, and High-Strength Low-Alloy with Improved Formability

5. ASTM E165/E165M-12 Liquid Penetrant Examination for General

Industry

6. ASTM E709/E709M-15 Standard Guide for Magnetic Particle

Testing

B. American Welding Society, Inc. (AWS)

1. AWS D1.1/D1.1M-15 Structural Welding Code – Steel

C. American Water Works Association (AWWA)

1. AWWA C200-12 Steel Water Pipe - 6 Inch (150mm) and

Larger

Revised - 33 11 12 - 2

2. AWWA C205-12 Cement-Mortar Protective Lining and

Coating for Steel Water Pipe - 4 Inch

(100mm) and Larger - Shop Applied

3. AWWA C206-17 Field Welding of Steel Water Pipe

4. AWWA C208-12 Dimensions for Fabricated Steel Water Pipe

Fittings

5. AWWA C227-11 Bolted, Split-Sleeve Restrained and

Non-restrained Couplings for Plain-End

Pipe

6. AWWA C604-11 Installation of Buried Steel Water Pipe

4 Inch (100 mm) and Larger

7. AWWA M11-04 Steel Pipe: A Guide for Design and

Installation, Fourth Edition

1.03 SUBMITTALS

A. Submit the following in accordance with Section 01 33 00 – Submittals.

B. RSN 33 11 12-1, Steel Line Pipe Thicknesses:

1. Show straight line pipe fabrication details.

2. Provide steel thickness and yield stress tables for each pipe size, depth, and head class.

3. Show details of factory epoxy lining of joint cement mortar hold back area if alternate epoxy joint recess lining is proposed.

C. RSN 33 11 12-2, Field Welder Qualifications

1. Welder Certifications.

D. RSN 33 11 12-3, -4, -5, -6, Shop Drawings:

1. RSN 33 11 12-2, Reach 2, Start of Reach 2 to Start of San Juan River HDD.

2. RSN 33 11 12-3, Reach 2, End of San Juan River HDD to end of Reach 2.

3. RSN 33 11 12-4, Reach 3, Start of Reach 3 to Start of Chaco River HDD.

4. RSN 33 11 12-5, Reach 3, End of Chaco River HDD to end of Reach 3.

5. Submit concurrently with applicable corresponding Reach section of pipelaying diagrams submitted until Section 33 11 10 – Pipeline General Requirements.

6. Show pipe and fitting fabrication details.

7. Show exact dimensions of joints and proposed joint restraint.

8. Show exact dimensions of welding lead holes and repair method.

9. Show details of factory epoxy lining of joint cement mortar hold back area if alternate epoxy joint recess lining is proposed.

Revised - 33 11 12 - 3

10. See RSN 33 11 10-2 through -5 for further details.

E. RSN 33 11 12-7, Ventilation Plan:

1. Method for ventilating inside of pipe when placing mortar lining for joints.

F. RSN 33 11 12-8, Single Lap Weld Stress Calculations:

1. In accordance with Article 3.01 B. 5.

1.04 GENERAL

A. In accordance with applicable portions of Section 33 11 10 – Pipeline General

Requirements.

1.05 QUALIFICATIONS

A. Steel Pipe Welders: Welders and Welding Operators to be qualified in accordance with

AWS D1.1.

PART 2 PRODUCTS

2.01 STEEL LINE PIPE

A. Pipe:

1. Electric fusion (arc) welded helical-seam steel pipe: ASTM A139, Grade C, D, or

E.

2. Fabricated in accordance with AWWA C200:

a. Except:

1) Steel plate: ASTM A283, Grade C or D.

2) Steel Sheet or coil: ASTM A1011, designation SS, Grade 40, 45, or 50; or ASTM A1018, designation SS, Grade 40 or designation

HSLAS-F, Grade 50.

3. Apply heat sheet shrink sleeve as detailed in Section 09 96 20 – Coatings. Install weld seam tape prior to applying sleeve.

B. Inside diameter measured to inside of lining shall not be less than nominal diameter shown on drawings.

C. Minimum Steel Wall Thickness:

1. Greater thickness from the following requirements:

a. Steel Wall Thickness for Handling:

1) Equal to inside diameter (inches) of pipe steel shell divided by 240 for mortar lined and flexible coated steel pipe.

2) In no case shall steel pipe wall thickness be less than 0.135-inches.

Revised - 33 11 12 - 4

b. Steel Wall Thickness for Internal Pressure:

1) Hoop stress of pipe shell. Not to exceed:

a) 50 percent yield strength as defined by steel grade of steel using the Barlow formula. With pressure defined by

Hydraulic Grade Line as shown on pipeline plan and profile drawings.

b) 75 percent yield strength as defined by grade of steel using the Barlow formula. With pressure defined by pipe head class as shown on pipeline plan and profile drawings.

2) Barlow formula as defined by AWWA M11 Equation 4-1.

c. Steel Wall Thickness for Steep Pipe (“K”): Minimum 0.25-inches or greater as required for Internal Pressure.

D. Steel shall be fully killed and conform to fine grain practice.

E. Rubber gaskets: In accordance with AWWA C200.

2.02 FITTINGS

A. Steel: Materials listed in Section 2.01A. ASTM A283, Grade C or D or ASTM A1011, designation SS, Grade 40, 45, or 50; or ASTM A1018, designation SS, Grade 40 or designation HSLAS-F, Grade 50.

B. Minimum steel wall thickness and fitting dimensions: In accordance with AWWA C200, AWWA C208 and AWWA M-11.

C. Minimum pressure rating of fittings shall match adjacent pipe.

D. Welding:

1. AWS D1.1.

E. Lifting eyes and other handling devices: Made part of fitting before lining and coating are applied.

F. Bolts and Nuts: ASME B18.2.1 and FS FF-N-836.

G. Coating and lining in accordance with Section 09 96 20 – Coatings.

H. Cement-Mortar Lining for Specials and Bends Larger than 24-inches:

1. In accordance with AWWA C205.

2. Apply lining with a resultant surface finish, including joints, equal to finish of adjacent pipe.

I. Joints between fittings and ductile iron pipe:

Revised - 33 11 12 - 5

1. Rubber gasket joints.

2. Joint dimensions and tolerances: Same as pipe manufacturer's joint design.

J. Miter Bends: Fabricate steel bends in accordance with AWWA C208, AWWA M-11 and as shown on drawings. Radius of miter bends for line pipe shall be 2.5 times the pipe outside diameter.

K. Pipe Couplings:

1. Coupling types as shown on drawings.

2. Suitable for line pipe materials used.

3. Suitable for cold water pressures of pipe head classes on drawings.

4. Refer to Section 33 21 95 – Metal Piping for Line Pipe Installations for coupling requirements.

L. Closure Section Joints

1. Restraint requirements shown on drawings.

2. Field welded butt strap joints.

3. Bolted, Split-Sleeve Restrained and Nonrestrained Couplings for Plain – End:

a. In accordance with AWWA C227.

b. Refer to Section 33 21 95 – Metal Piping for Line Pipe for coupling requirements.

M. Tees:

1. Tees for air valves, blowoffs, manholes, and turnout as shown on drawings.

2. Tee length, minimum: As shown on drawings, required for blocking, or in accordance with AWWA C208 whichever is greater.

2.03 LININGS AND COATINGS

A. In accordance with Section 09 96 20 – Coatings.

B. Do not field apply mortar lining without COR approval.

C. Fill inside joint recess of cement mortar lined pipe with cement mortar per AWWA

C205.

2.04 CONCRETE

A. Concrete in Thrust Blocks and Collars: Section 03 30 00 – Cast-in-Place Concrete.

2.05 FLANGES:

A. In accordance with AWWA C207.

Revised - 33 11 12 - 6

B. Class: Working pressure meets or exceeds head class of attached pipe

C. Flange bolt pattern shall match bolt pattern of mating flange.

2.06 INSULATED FLANGE

A. Full face gasket insulating kit as manufactured by Pipeline Seal and Insulator, Inc., 6525 Goforth Street, Houston, TX 77021, complete with Linebacker type gasket, Advanced Products and Systems, Inc., P.O. Box 60399, Lafayette, LA 70596-0399, complete with Trojan type gasket, or equal with the following essential characteristics:

1. Gasket:

a. Full face, Type E.

b. Outside diameter same as outside diameter of flange.

c. Retainer:

1) Phenolic or other material suitable for water service as recommend by the manufacturer.

2) Thickness, minimum: 1/8-inch.

3) Dielectric strength, minimum: 500-volts per mil.

d. Sealing ring: Nitrile.

2. Bolt isolating sleeves:

a. Full length. Extends halfway into both steel washers when installed.

b. Tube thickness: 1/32-inch.

c. Mylar or other suitable material recommended by the manufacturer.

3. Washers:

a. Isolating washers:

1) Phenolic or other material suitable for water service as recommend by the manufacturer.

2) Thickness, minimum: 1/8-inch.

3) Dielectric strength, minimum: 500-volts per mil.

4) Inside diameter: Fit over isolating sleeve.

b. Steel washers:

1) Thickness: 1/8-inch.

2) Inside and outside diameters: Same as isolating washers.

4. No asbestos.

Revised - 33 11 12 - 7

2.07 FLANGE GASKETS

A. Multi-Swell Style 3760-U as manufactured by Garlock, www.garlock.com or equal with the following essential characteristics:

1. AWWA C207 or ASME B16.21.

2. Flat, full face or ring type.

3. NSF 61 Certified.

4. Suitable for cold water service.

5. Provide flanges suitable for line pipe pressure locations.

2.08 CONTRACTOR SOURCE QUALITY TESTING

A. Pipe and Fittings:

1. Hydrostatic Test:

a. Perform shop hydrostatic test on pipe which stresses steel to 75 percent of minimum yield point of the steel.

b. Hold pressure long enough to allow thorough inspection of welded joints.

c. Repair leaks by rewelding and retesting joints.

d. Test sections prior to forming bell and spigot joints.

e. Repair defects and retest section before applying lining and coating.

f. Government may witness hydrostatic testing and calibration of pressure gauges. Notify Government 30 days prior to performing hydrostatic test.

2. Fittings fabricated from tested steel pipe do not require hydrostatic testing if welds are tested.

a. Weld test: Dye penetrant test in accordance with ASTM E165 or

Magnetic Particle in accordance with ASTM E709.

b. Weld defect repair. Chip, flame gouge, or grind to sound metal; reweld;

and test repaired weld.

B. Joint Testing: Assemble one joint for each pipe diameter to check bell and spigot to check fit prior to coating or lining.

PART 3 EXECUTION

3.01 INSTALLATION

A. Joining Pipe:

1. In accordance with AWWA C604.

2. Verify inside joint gap meets manufacturer’s tolerances as work progresses.

B. Joints for Pipe with Welded Joints:

http://www.garlock.com/

Revised - 33 11 12 - 8

1. In accordance with AWWA C206. Welded joints after backfill not allowed.

2. Perform dye penetrant test on welds in accordance with ASTM E165 and repair any defects.

3. Welded Butt Joints:

a. As required for pipe on steep slopes as shown on drawings.

4. Double Lap Weld Joints:

a. Provide joint with full fillet welds.

b. Air test double lap welds in accordance with AWWA C206 and repair any defects.

c. Required on thrust restrained joints greater than 30 degree bend deflection angles, unless butt welded joints are required, and within steel casing pipe.

5. Single Lap Weld Joints: : May be used if calculations sealed by professional engineer in the State of New Mexico show allowable stresses of weld and pipe materials shall not be exceeded for each head class:

a. May be used on thrust restrained joints with 30 degree bend deflection angles or less.

b. Road and wash crossings unless butt or double-lap welded joints are required.

c. Perform Vacuum Box Test and repair any defects in accordance with

AWWA C206.

6. Joint Thrust Restraint: As shown on drawings.

7. Joints within casings: Double lap or full penetration butt welded.

C. Connections at Thrust Blocks and Structures: As shown on drawings

D. Closure Sections:

1. Where necessary as determined by Contractor, subject to approval of COR.

2. Ambient temperature when closure section is welded, maximum: 60 degrees F.

3.02 TOLERANCES

A. Lay pipe to lines and grades shown on drawings or established by COR to following tolerances:

1. Departure from and return to established alignment and grade, maximum:

1/16-inch per foot of pipe.

2. Total departure from established alignment and grade, maximum: 1-inch.

3.03 ADJUSTMENTS IN ALIGNMENT AND GRADE FOR PULLED JOINTS

A. Per approved pipe laying diagrams.

B. Refer to Section 33 11 10 – Pipeline General Requirements.

Revised - 33 11 12 - 9

C. Make small minor changes in alignment and grade by providing small deflections between adjacent pipe sections as follows:

1. Pulling rubber gasket bell-and-spigot joint:

a. A total 1-inch joint deflection may be permitted by reducing normal

1/2-inch inside mortar space to 1/4-inch and pulling opposite side of pipe

3/4-inch from normal closure.

b. Provide unsymmetrical closure at welded lap joint up to maximum pullout of 1-inch.

2. Maximum deflection angle between adjacent pipe sections: Manufacture’s recommendations but shall not exceed 5 degrees.

D. Lay ends of each section of steel line pipe on theoretical centerline of curve and to grade shown on drawings within laying tolerances prescribed above.

3.04 JOINT LINING AND COATING

A. Field joints for pipe with shop applied cement-mortar lining.

1. Line field joints with cement-mortar in accordance with AWWA C205.

2. Coat exterior joints as specified in Section 09 96 20 – Coatings.

3. Do not backfill field joints until coating is approved by OGR.

4. Welding after backfill not allowed.

B. Apply shrink sleeves to field joints in accordance with Section 09 96 20 – Coatings.

3.05 BACKFILL

A. Keep internal supports in place until embedment has been placed and compacted above bottom of pipe to minimum height of 0.7 times diameter.

3.06 PIPE DIAMETER DEFLECTION

A. Allowable short-term vertical pipe diameter deflection after backfilling is complete.

1. Decrease, maximum: 2 percent of nominal pipe diameter.

2. Elongation, maximum: 3 percent of nominal pipe diameter as measured when backfill reaches pipe crown.

3. Short term is within 2 weeks after backfilling is complete.

B. Allowable long-term vertical pipe diameter deflection, at end of warranty period:

1. Decrease, maximum: 3 percent of nominal pipe diameter.

Revised - 33 11 12 - 10

PVC Gravity Drain for San Juan Lateral Water Treatment Plant Regulating Tanks

33 11 17 - 1

SECTION 33 11 17

PVC GRAVITY DRAIN FOR SAN JUAN LATERAL WATER TREATMENT PLANT

REGULATING TANKS

PART 1 GENERAL

1.01 MEASUREMENT AND PAYMENT

A. Cost:

1. Include in price offered Price Schedule 2 for San Juan Lateral Water Treatment

Plant Regulating Tanks:

a. Includes:

1) Pipe bedding and backfill for gravity drain.

2) Solid and Slotted PVC pipe for gravity drain.

3) Fittings for gravity drain.

4) Flexible coupling for gravity drain.

5) Metallic warning tape for gravity drain.

6) Outfall screen for gravity drain.

1.02 REFERENCE STANDARDS

A. ASTM International (ASTM)

1. ASTM A240/A240M-17 Chromium and Chromium-Nickel Stainless

Steel Plate, Sheet, and Strip for Pressure

Vessels and for General Applications

2. ASTM C33/C33M-16e1 Concrete Aggregates

3. ASTM C1173-18 Flexible Transition Couplings for

Underground Piping Systems

4. ASTM D882-12 Tensile Properties of thin Plastic Sheeting

5. ASTM D1785-15 Rigid Poly(Vinyl Chloride) (PVC) Plastic

Pipe, Schedule 40, 80 and 120

6. ASTM D2103-15 Polyethylene Film and Sheeting

7. ASTM D2466-15 Poly Vinyl Chloride (PVC) Plastic Pipe

Fittings, Schedule 40

8. ASTM D2564-12 Solvent Cements for Poly(Vinyl Chloride)

(PVC) Plastic Piping Systems

9. ASTM D2672-96a(2009) Joints for IPS PVC Pipe Using Solvent

Cement

33 11 17 - 2

10. ASTM D5926-15 Poly (Vinyl Chloride) (PVC) Gaskets for

Drain, Waste, and Vent (DWV), Sewer, Sanitary, and Storm Plumbing Systems

11. ASTM F480-14 Thermoplastic Well Casing Pipe and

Couplings made in Standard Dimension

Ratios (SDR), SCH 40 and SCH 80

12. ASTM F656-10 Primers for Use in Solvent Cement Joints of

Poly (Vinyl Chloride) (PVC) Plastic Pipe and Fittings

1.03 SYSTEM DESCRIPTION

A. This specification section covers the gravity drain around perimeter of the San Juan

Lateral Water Treatment Plant Regulating Tanks and continuing to a daylight termination point at the site riprap lined drainage channel.

B. Gravity drain conveys water collected from the concrete tank gravel drain system to site riprap lined drainage channel through 6-inch PVC pipeline.

C. General routing of the gravity drain is shown on drawing 1695-D-624731695-D-60160.

D. Pipe connection locations are shown on drawing 1695-D-624731695-D-60162.

1.04 SUBMITTALS

A. Submit the following in accordance with Section 01 33 00 – Submittals.

B. RSN 33 11 17-1, Certification:

1. Submit manufacturer’s certification that pipe meets specified requirements.

C. RSN 33 11 17-2, Pipe Layout Drawings:

1. Contractor’s drawings of piping covered by this specification.

2. Plan view drawing showing dimensions and distances of all system components.

3. Profile view drawing showing elevations, centerlines and depth of cover.

D. RSN 33 11 17-3, Product Approval Data:

1. Shipping, handling and installation procedures.

2. Manufacturers name, commercial products data and drawings, illustrations and dimensions for all pipe, fittings, and components.

E. RSN 33 11 17-4, Final Data:

1. As-built drawings.

33 11 17 - 3

1.05 DELIVERY, STORAGE, AND HANDLING

A. Deliver, store and handle equipment and components in accordance with manufacturer’s recommendations to prevent damage.

B. Do not use rope, cable, or chain slings to handle drain pipe. Fabric slings not less than

12-inches in width may be used to handle drain pipe.

PART 2 PRODUCTS

2.01 PIPE AND FITTINGS

A. Solid Polyvinyl Chloride (PVC) Pipe, Schedule 40, 6-inch:

1. ASTM D1785.

2. End Style: Socket solvent cement.

B. Slotted PVC Underdrain Pipe, SDR17:

1. ASTM F480.

2. Slot Requirements:

a. Width: 0.085-inch.

b. Spacing: 0.25-inch.

c. Open Area: 43.0 square inches, minimum, per foot of pipe.

3. End Style: Socket solvent cement.

C. PVC Extruded or Injection-Molded Pressure Fittings:

1. ASTM D2466.

2. Pressure rating equal to pipe.

D. Solvent cement ASTM D2564.

E. Primer ASTM F656.

F. Metallic Warning Tape:

1. Compliant with ASTM D882 and ASTM D2103.

2. Standard 6-inch wide, commercial quality, detectable underground warning tape.

3. Continuous tape with message “Caution Buried Waterline Below.”

4. Color: Blue.

33 11 17 - 4

2.02 COMPONENTS

A. Flexible Coupling:

1. Fernco 1056 Series manufactured by Fernco, Incorporated, 300 S. Dayton Street, Davison, MI, 48423; or equal, having the following essential characteristics:

a. Compatible with the pipe material and fittings.

b. Positive seal against infiltration and exfiltration.

c. Leakproof and resistant to chemicals and fungus growth.

d. Conforms to ASTM D5926 and C1173.

e. Connects pipes of same or different sizes and materials quickly and easily.

f. Stainless steel clamps are corrosion resistant and rustproof.

2.03 OUTFALL SCREEN

A. Stainless Steel Wire Cloth:

1. Stainless steel, ASTM A240, Type 304 or 316.

2. Mesh openings per linear inch: 4 by 4.

3. Wire diameter, minimum: 0.080-inch.

B. Bands for Screen:

1. Stainless steel: ASTM A240, Type 304 or 316.

2. Thickness, minimum: 10 gauge.

3. Width, minimum: 1/2-inch.

2.04 PIPE BEDDING

A. ASTM C33, coarse sand 100 percent passing 3/8-inch screen and 95 percent passing

No. 4 screen.

2.05 PIPE TRENCH BACKFILL

A. Per Section 31 23 02 – Compacting Earth Materials.

PART 3 EXECUTION

3.01 INSTALLATION

A. Laying of slotted wall pipe:

1. In accordance with 31 24 18 – Gravel Drain for Water Storage Tanks.

33 11 17 - 5

B. Laying of solid wall pipe:

1. Install water pipes in conformity to the approved design plan and in coordination with OGR.

2. Clean each section of pipe and each fitting before installation.

3. Lower pipe and fittings into the trench preventing damage to pipe. Use approved slings when required.

4. Lay pipe true and uniform to line and grade, with no visible change in alignment at any joint unless curved alignment is called for on the drawings:

a. If deflection is required, maximum deflection must not exceed the manufacturer's recommendation for the type of pipe and joint being used.

5. Whenever pipe laying is discontinued for an hour or more, close open ends of pipe with water-tight plugs.

6. Pipe shall not be laid when condition of trench or weather is unsuitable or when there is the possibility of foreign material entering the pipe.

7. Keep pipe interior free of dirt, filter material, and foreign material. Provide temporary closure at open pipe ends during work shutdown.

C. Flexible coupling:

1. Install on the gravity drain polyvinyl chloride pipe, beyond the tank foundation liner, as shown on drawing 1695-D-62473.

D. Joining Methods:

1. Solvent cement pipe sections in accordance with ASTM D2467, and

ASTM D2672.

E. Slope gravity drain lines to daylight above riprap lined drainage channel. Slope shall be

0.01 minimum.

F. Install stainless steel metal cloth on open ends of pipes at site drainage channel.

3.02 EARTHWORK AND TRENCHES

A. Pipe Bedding and Backfill:

1. Minimum 4-inches below pipe and 6-inches above.

2. Place initial fill in even layers not exceeding 4-inches in depth and hand tamped to the spring line of the pipe, before proceeding to next layer.

3. Place backfill in even layers not exceeding 6-inches in depth and compacted, before proceeding to next layer.

B. Gravel Drain Material: In accordance with Section 31 24 18 –…