SPECIFICATIONS_summary of work.docx

CSI SPECIFICATION INDEX

FOR

NKRD Facilities Maintenance – FY24

DIVISION 1 – GENERAL REQUIREMENTS

011100 – Summary of Work 013300 – Submittal Procedures 016010 – Mobilization

DIVISION 31 – EARTHWORK

312333 – Trenching and Backfill DIVISION 33 – UTILITIES 330500 – Common work Results for Utilities 331419 – Valves and Hydrants

END OF SPECIFICATION INDEX

DIVISION 1 GENERAL

SUMMARY OF WORK – 011100

PART 1 - GENERAL

1.1 Scope of Work

The Contractor shall be responsible for furnishing all labor, equipment, transportation, and specified materials/supplies necessary to complete the replacment of two (2) underground water system control valves, one (1) 4” backflow preventer assembly, two (2) electric heaters, two (2) roof penetration boots, one (1) propane shut-off valve, one (1) electric incinerating toilet, and one (1) ¾” PEX water line (approximatly 3” in length).

The contractor is also responsible for furnishing all labor, equipment, transportation, and specified materials/supplies necessary to complete the following new improvements. One (1) French Drain (21’L x 2’W x 2.5’D) and associated underground 4” drainage culvert (approximatly 65 L.F.), one (1) 120v, 15 amp circuit with quadplex outlet installed on existing steel lookout tower (intended outlet location is approximatly 100’ above ground level)

The Contractor shall be responsible for furnishing all labor, equipment, transportation, and specified materials/supplies necessary to complete the repair/replacement of the existing 4” sanitary sewer at Big Springs Work Center (Bid Items #9 and #9A). The intent of this contract is to either clear the blocked sewer line using non-destrictive methods or to completely replace the blocked section of sewer (damaged sections of sewer line shall not be left in-place without adaquate repair to fully restore integrity of sewer pipe). Contractor will be responsible for investigating the nature of the blockage, and determining the appropriate course of action to bring the blocked sewer into full working order. If the sewer pipe is found to be physically compromised, then replacment of the compromised section will be requiered. Only one of the two bid items, #9 and #9A will be paid. Contractor is responsible for coordinating with COR during the process to elect which bid item will be necessary for successful repair of the sanitary sewer.

1.2 Background

The Jacob Lake Work Center and Big Springs Work Center have seasonal potable water systems that provide water to administrative, recreational and residential facilites. Control valves on the systems have become inoperable due to corrosion and burst damage and are in need of replacement.

The backflow preventer for the Jacob Lake water system has also been found to be ineffective and is in need of replacement.

Electric heaters for the pump house at Big Springs Work Center and the BFP enclosure at Jacob Lake Work Center have failed and need to be replaced.

The PEX supply line to one of the facilities at Big Springs Work Center has burst and is in need of repair

A roof penetration at the Big Springs Lookout cabin has shown signs of leaking and is in need of replacment.

A roof penetration at the Jacob Lake Work Center admin building has been ripped away from the roof due to snow buildup on the roof. The boot and penetrating pipe need to be replaced.

The incinerating toilet at the Dry Park Lookout has beecome inoperable and causes the 20 amp gfi outlet to trip during operation. The toilet needs to be replaced.

The propane shut off valve for an RV pad at the Jacob Lake Work Center has a crack in the valve body and needs to be replaced.

A recent camara installation on the Big Springs Lookout Tower requires a dedicated power source. A new dedicated circuit and outlet shall be installed so that the outlet is located within 6’ of the recently installed equipment enclosure which is installed approximately 100’ above the ground. The new circuit shall be connected to the existing panel located on the adjacent communications building.

The mess hall at Big Springs Work Center is located adjacent to a spring feed drainage that flows year round with water. During periods of high flow, water will pool next to the mess hall and infiltrate the mess hall concrete slab foundation. A french drain is needed to convey water away from the mess hall and divert flow back into the adjacent channel.

The Sanitary Sewer for Big Springs Work Center is an On-Site Septic System. The sewer line that conveys flow from the mess hall to the septic tank has a blockage that causes flow to back up into the plumbing (floor drains begin to overflow while kitchin sink is running). There is a possibility that the serwer has become compromised due to damage from tree roots. The sewer needs to be restored to provide 100% capacity and any compromised sections between the mess hall and septic tank shall be repaired to full integrity.

1.3 - Location

There are several project locations for this contract, all located within the North Kaibab Ranger District on the Kaibab National Forest:

Jacob Lake Work Center: From Fredonia, Arizona, take US-89A southbound for 29.5 miles. At the Junction of US-89A and AZ-67, Turn Right (to the south) and travel for 0.4 miles. At the junction of AZ-67 and FSR 461, turn right (to the west) and travel for 0.4 miles. Jacob Lake Work Center will be located on the left side of the road (south side).

Big Springs Work Center: From Fredonia, Arizona, Take Highway US-89A southbound for 1.3 miles. At the junction of US-89A and FSR 22, turn right (to the south) and travel for 27.5 miles. Big Springs Work Center will be on the left side of the road (east side)

Big Springs Lookout: From Fredonia, Arizona, Take Highway US-89A southbound for 1.3 miles. At the junction of US-89A and FSR 22, turn right (to the south) and travel for 28.5 miles. At the junction of FSR 22 and FSR 429, turn left (to the east) and travel 5.4 miles. At the junction of FSR 429 and FSR 454, turn left (to the west) and travel 3.7 miles. Big Springs Lookout will be at the end of FSR 454.

Dry Park Lookout: From Fredonia, Arizona, Take Highway US-89A southbound for 1.3 miles. At the junction of US-89A and FSR 22, turn right (to the south) and travel for 42.0 miles. Dry Park Lookout will be on the right side of the road (west side).

1.4 Work Description:

BASE ITEMS

1. 2” curb stop replacement – Jacob Lake Work Center

1.1. Remove and replace existing curb stop

1.1.1. Designated as V10 on EX-1

1.1.2. According to available records, existing waterline is shown to be 2” PVC. The waterline has been measured to be buried 3.5’ below grade.

1.2. Reuse of existing meter box shall be contingent on COR approval.

1.3. Water system is seasonal and is typically in use April-October

2. Replace 1” propane shut-off valve – Jacob Lake Work Center

2.1. Remove and replace existing shut-off valve

2.2. Valve is exterior installation located at site “T1A”; shown on EX-1

3. Replace Backflow Preventer Enclosure Heater – Jacob Lake Work Center

3.1. Existing enclosure heater has failed and should be replaced in like kind.

3.1.1. Hot Box, 120-volt, 1000 watt, single phase electric heater with integrated circulation fan and adjustable thermostat. Wall mounted. Or approved equal

3.2. Existing 120-volt duplex outlet is installed in the enclosure.

3.3. Heater shall be attached to the interior of the enclosure, location shall be confirmed with COR.

4. Replace roof penetration boot – Jacob Lake Work Center

4.1. Existing drain vent roof penetration has become unattached to roof.

4.2. Contractor shall repair the drain vent pipe and install commercially manufactured boot on existing metal roof/galvanized pipe penetration.

4.3. Contractor shall clean roof and pipe surface of all debris and shall remove previously placed sealants and boot.

4.4. Contractor shall install boot according to manufacture’s recommendations. In addition, contractor shall use butyl sealing tape on interface between boot and metal roof, as well as, use “through the roof” sealant between boot and pipe. Flexible sealant shall be tooled into joint between pipe and boot. Contractor may submit other flexible sealant brands with COR for approval.

5. Replace 1” Curb Stop Valve – Big Springs Work Center

5.1. Existing 1” ball valve shall be replaced with 1” curb stop.

5.1.1. The existing valve is located in an existing water meter box near the volleyball court, shown on EX-2

5.1.2. The existing valve is attached to a threaded 1” water meter on one side and threaded PVC on the other end. The water line has been measured to be buried 3.0’ below grade.

5.2. Water meter shall remain. Reuse of existing meter box shall be contingent on COR approval.

5.3. The water system is seasonal and is typically in use April-October

6. Install 15-amp, 120v circuit and quadplex outlet – Big Springs Lookout

6.1. Contractor shall install a new quadplex outlet on a new dedicated circuit on an existing exterior electrical panel

6.1.1. Contractor shall evaluate current service and make appropriate improvements to install the proposed circuit.

6.2. New electrical conductor shall be completely enclosed (water tight) in schedule 40 PVC electrical conduit, Flexible PVC type B electrical conduit ,or galvanized steel electrical conduit. Above ground conduit shall be attached to steel tower using galvanized steel conduit hangers and galvanized steel beam clamps. Clamps, hangers, and conduit shall be of a compatible size and design for use on the existing steel tower members. All equipment shall be installed according to manufacture’s recommendations.

6.3. All conduit supports shall be clamp directly to steel tower structural members only (strap style support may be used for attachment to adjacent masonry and wood structure).

6.4. New quadplex outlet shall be installed within 6 feet of the existing camera equipment enclosure (approximately 100 feet above ground level, wet location). Contractor may use galvanized steel channel with maximum dimensions of 3x3 to support the new outlet to the tower. Steel channel must be clamped to steel tower structural members only.

6.5. Any buried conduit shall be wrapped in 20 mil pipe wrap tape, no portion of bare conduit shall be installed below grade.

6.6. Contractor shall confirm location of new outlet with COR prior to installation.

6.7. All Cutting and/or drilling of existing steel tower structure must be approved by COR prior to cutting/drilling.

6.8. Installation of new circuit shall not interfere with any existing systems or appurtenances of the tower.

7. Replace roof penetration boot – Big Springs Lookout

7.1. Existing drain vent roof penetration has become unattached to roof.

7.2. Contractor shall repair the drain vent pipe and install commercially manufactured boot on existing metal roof/galvanized pipe penetration.

7.3. Contractor shall clean roof and pipe surface of all debris and shall remove previously placed sealants and boot.

7.4. Contractor shall install boot according to manufacture’s recommendations. In addition, contractor shall use butyl sealing tape on interface between boot and metal roof, as well as, use “through the roof” sealant between boot and pipe. Flexible sealant shall be tooled into joint between pipe and boot. Contractor may submit other flexible sealant brands to COR for approval.

8. Incinerating toilet replacement – Dry Park Lookout

8.1. Replacement of existing electric incinerating toilet; Brand: Incinolet

8.2. Replacement toilet shall be incinolet (stainless steel model), installation of other brand or model toilets requires COR approval.

8.3. Contractor shall install toilet in accordance with manufacture’s recommendations.

8.3.1. Electric service at the existing toilet is a 20amp GFI outlet; with a 20amp, 120volt circuit.

8.3.1.1. Contractor is responsible for assuring electrical system is adequate to operate replacement toilet.

8.3.2. Existing toilet exhaust vent is a 4” PVC mounted horizontally through the exterior wall, centerline of vent tube is measured 10” above floor elevation.

8.4. Contractor is responsible for any improvements to the electrical system need for operation of the toilet.

9. Remove blockage existing 4” sanitary sewer – Big Springs Work Center

9.1. Existing sanitary sewer has reduced capacity and is suspected of having a blockage in the line.

9.2. Existing cleanout is located to the rear of the messhall near the kitchen sink (see exhibit)

9.3. Contractor shall inspect and clear sewer line using mechanical or hydraulic means.

9.4. Contractor shall T.V. sewer line (minimum 90 L.F. measured from the cleanout) during certification of work, . Digital file of T.V. inspection shall be provided to COR prior to closure of contract

10. Install French Drain w/ 4” perforated pipe, approx. 21 L.F.; 4” storm drain, approx. 60 L.F. – Big Springs Work Center

10.1. Existing messhall has water infiltration through the foundation slab.

10.2. Contractor shall install French drain and subsurface drainage to convey run-off into adjacent channel.

10.3. Construction shall conform to drawings and details shown on sheets C-01 and C-02

11. Replace Pump House Heater – Big Springs Work Center

11.1. Existing heater is Cadet Model CS101, 120v, 60 Hz, 1000w

11.2. Contractor shall install new electrical heater with 1000w heating capacity. Heater shall be attached to the interior pumphouse wall. Location shall be confirmed with COR.

11.3. Contractor is responsible for verifying that existing electrical circuit has capacity for new heater.

12. Repair ¾” PEX Waterline – Big Springs Work Center

12.1. Make repair to existing PEX supply water line, which has burst.

12.1.1. PEX pipe failure is located in crawl space of residential building, shown on photo 012.1

12.1.2. Contractor shall be responsible for evaluating condition of supply line plumbing at the immediate location of the repair and shall choose an appropriate method of repair/replacement.

12.1.3. Material used shall be compatible with existing plumbing and materials.

12.2. The water system is seasonal and is typically in use April-October

13. Replace 4” Double Check Valve Backflow Preventer – Jacob Lake Work Center

13.1. Existing BFP has been determined to have leaks through one check valve. One of the gate valves also leaks through when closed.

13.2. Contractor shall replace the faulty BFP assembly (including 4” gate valves on inlet and discharge end of BFP). Existing waterline connections should be utilized if possible.

13.2.1. Existing BFP is Wilkins Zurn 4” 350DA

13.3. Contractor shall tested BFP in accordance with AWWA and IAPMO recommendations.

13.3.1. Tester shall have ASSE/IAPMO/ANSI Series 5000 professional qualifications for BFP testing. Contractor shall provide certification ID of tester to COR.

1.5 – Contractor Representative The contractor shall provide a contract representative for the performance of the work. The name of this person and an alternate(s) who shall act for the contractor when the contractor is absent shall be designated in writing to the contracting officer. The contractor representative or alternate shall have full authority to act for the contractor on all contract matters relating to daily operation of this contract.

1.6 – Timing/Scheduling of Work This work is anticapted to start July 10, 2024. The site shall be open to normal work activities during construction. Contractor shall provide 48 hour notice prior to service disruptions and shall coordinate service disruptions with COR. No restrictions are placed on weekend work.

Contractor shall provide a schedule of proposed work prior to commencement of work.

1.7 – Quality Control/Quality Assurance

All work shall be completed in accordance with county/state applicable codes, project specifications, and construction drawings. The contractor shall provide all labor, material, and equipment necessary to perform all the operations for the work specified.

Contractor is solely responsible for verifying conditions of existing facilities. Any discrepancies between the existing conditions and the specifications in this contract found by the contractor shall immediately be reported to the COR. Work shall not continue, within the conflicting scope, until discrepancies have been resolved.

Dimensions of existing conditions are provided in these documents as reference only, it is the contractors sole responsibility to verify these dimensions and determine the requiered material quantiites and construction methods needed to complete all items contained in this contract.

1.8 – Warranty

Contractor shall warranty all workmanship from defects for a minimum period of 1 year, starting on the date of final acceptance of work. All materials and equipment shall be warrentied from defects by contractor or product manufacture for a minimum period of 1 year, starting on the date of final acceptance of work.

1.9– Use of Government Facilities

1. The work sites are available to the Contractor for staging and storage during construction. Any damage resulting from the Contractor's use of the site will be repaired or replaced at the Contractor’s expense at the direction of the Engineer.

2. Camping sites: No Forest Service campgrounds shall be made available for use by Contractor or his/her employees. All personel under supervision of the contractor and subcontractors shall abide by all laws regarding camping and overnight use of Forest Service land.

3. Sanitary facilities for construction workers shall be furnished and maintained by the Contractor during the life of the contract.

4. All temporary services and use areas shall be completely removed and the areas restored upon completion of use.

5. Electricity is available on site for contractor’s use.

6. Water is available on-site during the work season (typically April-October)

7. Transportation to and from the work site for the Contractor's personnel and materials will be provided at the Contractor's expense.

1.10 - Material Sources

All materials shall be obtained from a commercial source unless noted otherwise. Incinerating toilets shall be obtained from vendors that are approved by original manufacture.

1.11 - Clean up and Disposal

The Contractor shall keep the work site free from accumulation of waste materials and rubbish resulting from the work.

All materials that are demolished or replaced must be disposed of by the contractor, unless otherwise specified. Disposal of waste material will be off National Forest Land and in compliance with local, state and federal laws regarding disposal of construction waste.

Before final acceptance of the project by the Government, the Contractor shall remove from Government land all waste materials and rubbish resulting from this work.

1.12 - Subsurface Soils and Investigations

No auger boring tests were made in the area. Under supervision of the COR, the Contractor may undertake any site investigations necessary to ascertain subsurface conditions.

The Forest Service has made every attempt to reflect the location of existing utility lines accurately on the attached drawings. The exact location of the lines, however, may vary. The Contractor shall take care during excavations in the area of known lines or near any existing buildings. The Contractor shall field verify the exact location of existing utility lines for the purpose of making new connections.

Prior to commencement of work, the Contractor shall call AZ811 for all commercial utility line locations: 1-800-782-5348.

1.13 - Precautionary Measures

Environmental Protection:

All vehicles and equipment entering the project area must be clean of noxious weeds and will be subject to inspection. Wash all construction equipment to thoroughly remove all dirt, plant, and other foreign material prior to entering the project. Particular attention must be given to the under carriage and any surface where soil containing exotic seeds may exist.

Protection of Work:

The Contractor shall take precautions to protect all work during the construction period and shall provide and maintain adequate protection during severe weather conditions to prevent damage to the work, materials and equipment.

Safety:

The Contractor is responsible for safeguarding employees, public, existing facilities, and forest resources from their operations. All operations shall be in compliance with the requirements and restrictions of OSHA, the Arizona Occupational Safety and Health Code, and the Workman’s Compensation Board. The Contractor shall erect signs and chain-link fencing barricades as necessary to make unguarded operations safe. Signs and barricades shall be maintained at night and on weekends. Precautions such as lowering tractor blades and safely storing materials shall be practiced to prevent injury to others in the area.

Security:

No security shall be provided by the Government. The Contractor shall take all precautions deemed necessary to secure the worksite, improvements and equipment. This may include security fencing and/or a night watchman with mobile communication.

Site Accessibility The project sites are located on primitive, gravel roads. These roads are not maintained for winter weather and should be considered inaccessible when snow is present. Contractor shall consider accessibility when scheduling work.

1.14 – Construction Codes

Construction shall meet the requierments of all codes requiered by the Coconino County Building Division as well as all current AWWA and NSF standards

1.15 – Protection of Wildlife

· Prior to the start of project activities, the COR will contact personnel monitoring condor locations and movement to determine the locations and status of condors in or near the project area.

· All workers at the project site will be instructed to avoid interaction with condors and to immediately contact the COR if condor(s) occur at the project area.

· Any project activity that may cause imminent harm to condors will temporarily cease until a KNF wildlife biologist can assess the situation and determine the correct course of action.

· The project area shall be kept clean of trash, by the contractor, in order to minimize the possibility of condors accessing inappropriate materials.

· All vehicle fluid-leakage shall be cleaned up immediately.

· If condors consistently occur at the project area, or nest within 1 mile, then additional conservation measures may be necessary. KNF will report consistent condor occurrence at the project area to the U. S. Fish and Wildlife Service (USFWS) in a timely manner and will facilitate any necessary consideration of additional measures by KNF and the USFWS.

1.16 – Protection of Existing Conditions

Contractor is responsible for protecting all existing improvements. Contractor shall make repairs to any existing improvements that have been damaged due to the direct or indirect actions of the contractor/subcontractors. Repairs to damaged existing improvements must be made at no additional cost to the government.

Contractor shall establish grass seed in all disturbed soils, unless directed otherwise by COR. Grass seed mix shall approved by COR and shall be provided, placed, watered, and protected by contractor until grass cover is established in a manner consistent with surrounding area.

1.14 – Location Maps Dry Park Lookout Big Springs Lookout Big Springs Work Center Jacob Lake 003, 004 – Backflow Preventer 002 – 1” propane Shut Off 001 – 2” Curb Stop

Jacob Lake Work Center

008, 009, 010 – Incinerating Toilet, plumbing fixtures waterline Repair

Dry Park Lookout

011, 011A, 012 – Sewer Blockage, Sewer Replacement, French Drain 005 – 1” Curb Stop

Big Springs Work Center

006 – Electrical Outlet 007 – Roof Penetration Boot

Big Springs Lookout

1.15 – Photos

001.1 – 2” Curb Stop Replacement

001.2 – 2” Curb Stop Replacement

002.1 – 1” Propane Shut-Off

002.2-1” propane Shut-Off

003.1-BFP Enclosure Heater

004.1 – Roof Penetration Boot

004.2 – Roof Penetration Boot

005.1 – 1” Curb Stop Replacement

006.1 – New Electrical Outlet

006.2 – New Electrical Outlet

006.3 – Existing Camera Equimpent Enclosure

006.4 – Existing Steel Tower

006.5 – Existing Steel Tower

007.1-Roof Penetration Boot

008.1-Incinerating toilet

009.1, 009A.1 – Sanitary Sewer Blockage/Replacement and French Drain

010.2 – French Drain

010.3 – French Drain

011.1 – Existing Pump House Heater

012.1 – Repair PEX Waterline

013.1 – 4” Backflow Preventer

013.2 – 4” Backflow Preventer

END OF SPECIFICATION 011100

SUMMARY OF WORK

011100

DIVISION 1 GENERAL

SUBMITTALS

013300

SUBMITTALS – 013300

01300 - 8

PART 1 - GENERAL

1.1 - Requirements

It will be the Contractor's responsibility to submit all items with such promptness as to cause no delay in the work. Approvals must be obtained before starting work which involves the item. Contractor shall allow ten (10) days for processing of submittals by the Government.

Submittals may also be referred to as SHOP DRAWINGS.

1.2 - Manufacturer's Literature and Shop Drawings

Submit two (2) copies to the COR for approval on the items required herein. A digital copy may be submitted in place of hard copies.

Submittal specifications are to be submitted in the following format:

A. The specifications and salient qualities of the item specified in the contract.

01300 -

B. The specifications and salient qualities of the submittal item.

C. A listing of the differences and a comparison between the two, including but not limited to the structural qualities, operational qualities, any modifications necessary to accomplish installation of unit, and guarantee and warranty.

D. A cost comparison between the specified and submitted item(s) with the cost reduction benefit to the government or adequate justification for a cost increase to the government.

E. Shop drawings of submitted item(s) including wiring or layout diagrams.

If there are any modifications necessary to facilitate installation, a set of drawings showing installation of specified item and a set showing how the submittal item will be installed.

01300 - 10 Submittals will be waived if Contractor furnishes exact item used for design when manufacturer's model, size, etc. are shown in the contract.

01300 - 10

Submittals are required per the following sections:

Other required submittals include all those as specified in the referenced Forest Service Specifications for this project.

END OF SPECIFICATION 013300

SECTION 016010 – MOBILIZATION

PART 1 - GENERAL

PART 2 - PRODUCTS (Not Used) PART 3 - EXECUTION (Not Used)

PART 4 - MEASUREMENT AND PAYMENT

The Contractor can request payment for performance and payment bonds. The amount of the premium, including coinsurance and reinsurance agreements, will be paid upon receipt of evidence of full payment to the surety. When separate payment for bonding cost is made, the bonding cost will be subtracted from the total contract amount for this pay item and the balance paid in accordance with the progress payment schedule outlined below.

(a) When 5 percent or more of the original contract amount is earned from other pay items, 50 percent of the amount for mobilization, or 5 percent of the original contract amount, whichever is less, will be paid.

(b) When 10 percent or more of the original contract amount is earned from other pay items, 100 percent of the amount for mobilization, or 10 percent of the original contract amount, whichever is less, will be paid.

(c) Upon completion of all work on the project, any unpaid amount for mobilization will be paid.

B. Any bonding costs in excess of the total contract amount of this pay item will be paid under one or more other pay items under this contract as determined by the Contracting Officer. In no circumstance will the total amount of this contract be increased as a result of bonding costs exceeding the total contract amount of this pay item.

C. The total of all payments shall not exceed the original contract amount for this item.

END OF SECTION 016010

013300

DIVISION 31 - EARTHWORK

TRENCHING AND BACKFILL – 312333

PART 1 - GENERAL

1.1 - Description

This section covers excavation; furnishing, hauling, and placing select backfill materials; watering; compaction; disposal of excess or unsuitable material; and grading for utilities.

1.2 - Related Work Specified Elsewhere

330500 – Common work Results for Utilities 331419 – Valves and Hydrants

1.3 - Class of Material

Material to be excavated for installation of utilities is unclassified. Contractor is advised to classify the material to their satisfaction.

1.4 - Approvals Required Excavation Notify COR when excavation is completed. Do not place pipe, bedding, or backfill until the excavation is approved by the COR.

Commercially Supplies Bedding, Shading, & Backfill Material Submit material certification for COR approval prior to supplying backfill materials to project.

Backfill Do not place shading or backfill until installation of pipe/utility has been approved by the COR.

1.5 - Backfill Time Limit Backfill and restore surface materials of utility line trenches located in existing roadways or parking areas within 24 hours after approval to place backfill by the COR.

PART 2 - PRODUCTS

2.1 - Backfill Materials

Backfill shall contain no frozen or organic material.

TRENCHING AND BACKFILL – 312333

(a) Select Excavated Material Excavated material shall not contain rocks larger than 6 inches in largest dimension.

(b) Bedding/Shading Material Fine sand or soil with a maximum P.I. of 10, 100% passing the 3/8" sieve, without sharp chips or points.

(d) Conduit Backfill Material free of sharp edges and rocks greater than 4" inches diameter.

2.2 Water

Furnish water that is reasonably clean and free of substances detrimental to the work.

2.3 Marking Tape

Plastic marking tape printed with the words “Buried Water Line” or approved wording. Contractor may use “Detectatape” by Allen Systems, Inc., Terra-Tape, or approved equal.

PART 3 - EXECUTION

3.1 - Excavation Excavation shall not begin until all clearing or grubbing work has been completed. Operations shall be in compliance with the requirements and restrictions of OSHA, the Arizona Occupational Safety and Health Code, and the Workman's Compensation Board.

All trenches shall be excavated in reasonably close conformity with the lines and grades shown on the drawings. Any shifting or change from the alignment and grade shown on the drawings must receive prior approval by the COR in writing.

Lay utilities in continuous open trench. Short tunnel sections or boring may be used in special locations with the approval to the COR.

3.2 – Excavation Near Trees

Any excavation within an adjacent tree’s drip line must be approved by the COR. Contractor shall use extreme caution to not cause undue damage to trees while excavating. Excavation of trenches within the drip line shall be vertical wall trenches, roots within the trench zone shall be cut with pruning tools.

TRENCHING AND BACKFILL – 312333

3.3 - Overexcavation

Restore to grade any overexcavation by backfilling with bedding material.

3.4 - Wet Excavation

If water is encountered during trench excavation, provide adequate pumping equipment and piping to keep trench free from water and dispose of the water without damage to adjacent property. Separate payment will not be made for pumping of water from trenches or for excavation of material rendered unsuitable as a result of water encountered.

3.5 - Backsloping, Sheeting and Shoring

Backsloping of trench walls will be allowed only upon prior written approval of the COR.

Remove all shoring and sheeting when construction is completed. Withdraw shoring in such a manner as to prevent trench wall from caving in while backfilling.

3.6 - Excavated Material Pile excavated material at the side of the trench where it will provide the best protection for the work. Leave adequate space between the toe of the spoil pile and edge of trench, to prevent material from falling into the trench.

3.7 - Backfill

Before compacting backfill other than rock or sand, prepare material to a water content that will permit proper compaction by either aerating the material if it is too wet, or spraying the material with water if it is too dry. Thoroughly mix each lift before compaction to assure uniform distribution of water content. Do not compact material above pipe until there is 6 inches of cover over the pipe. There shall be no machine compaction within 6" of an electric cable or conduit. Compact each lift to the required density.

(a) Bedding and Shading Place in lifts 6 inches or less and compact using a vibrating plate compactor or jumping jack compactor with a minimum of 3 passes over the entire lift surface. Compact around pipe barrel and bells by hand tamping.

(b) Select Excavated Material and Conduit Backfill Distribute large rocks so they are individually surrounded by fine materials. Place 12-inch lifts or less and compact to at least 90% of the maximum dry density as determined by AASHTO T-99.

02223-3

(c) Backfill and Compaction in Roadways Place 6-inch lifts and compact to at least 95% of maximum dry density as determined by AASHTO T-99.

(d) Surface Restoration In Areas Other Than Roads All surfaces shall be restored to the required grade (usually original ground line), mounded over or smoothed off as directed, and left in a uniform and neat condition, to the satisfaction of the COR. Surface drainage shall be diverted so that it will not follow along a trench. In areas where natural re-vegetation is designated (no planting to be done), the Contractor shall scarify all disturbed or compacted areas and right-of-ways such that the surface of the ground is loose to a depth of at least one inch.

(e) Final Finish After the utility installation and backfill have been completed, finish all disturbed areas, except trench area required to be mounded AS SHOWN ON DRAWINGS, to a smooth, uniform grade and texture, well blended to the original contours, showing minimum evidence of construction activity.

(f) Trenches in Embankments When pipelines are to be placed in trenches excavated in embankments, the excavation of each trench shall be performed after the embankment has been constructed to a place at least 3 feet over the pipe or to finish grade, whichever is least.

Backfill Above-Pipe-Zone A. Above-Pipe-Zone Material - Backfill material shall be free from brush, perishable material, trash, rocks, or boulders larger than 6 inches in greatest dimension, or frozen material.

Backfill material shall be trench-excavated material whenever it meets specification requirements. Whenever trench excavated material contains less than 10 percent of oversized material, the Contractor will be required to remove boulders larger than 6 inches from the trench excavated material at no additional compensation and utilize it as backfill material. If, after all suitable trench excavated material has been used as backfill, the trench is not filled to the required grade, the Contractor will be required to import material from a designated or approved source, at no additional cost to the governemnt.

B. Procedure - When shown on the drawings as being required, marking tape shall be installed six to ten inches below the ground surface and shall run the full length of the trenches.

Backfill in trenches in area other than under roadways and parking areas shall be placed in horizontal layers 12-inches thick or less (loose measurement), and compacted before the succeeding lift is placed with at least three passes of vibratory plate compactor or jumping jack compactor.

TRENCHING AND BACKFILL – 312333

Backfill in trenches under roadways and parking areas shall be maintained, wetted, or dried to optimum moisture for maximum compaction, placed in the trench in horizontal layers not to exceed 6 inches in thickness (loose measurement), and compacted to not less than 95 percent of maximum dry unit weight, as determined by AASHTO T-99, Method D.

3.8 - Disposal of Excess Excavation and Unsuitable Material All suitable excavated materials shall be used as backfill. Any unsuitable excavation material may be disposed on-site in a location and manner approved by the COR.All excavated materials not required or unsuitable for backfill shall be utilized on the site or removed to waste areas as directed by the COR.

3.9 – Finishing and Cleanup After the utility installation and backfill has been completed, the disturbed area along the utility shall be finish graded to present as near a natural appearance as possible and cleaned up by removing all debris and materials not utilized. Stockpiled topsoil shall be smoothly distributed over disturbed areas.

END OF SPECIFICATION 312333

DIVISION 33 - UTILITIES

COMMON WORK RESULTS FOR UTILITIES - 330500 PART 1 - GENERAL

1.1-Description This section specifies the furnishing and installation of underground pipe for water, sewer, and drainage improvements.

All references to pipe sizes refer to the nominal diameter.

1.2-Related Work Specified Elsewhere 331419 – Valves and Hydrants 312333 – Trenching and Backfilling 1.3- Quality Assurance All piping and components used in contact with drinking water shall comply with ANSI/NSF 61, Drinking Water System Components – Health Effects. All plastic pipe and components shall also comply with ANSI/NSF 14, Plastic Pipe Components and Related Materials

Plastic pipe and components used for potable water systems shall be marked with NSF certification for potable water use.

All products shall be used in accordance with manufacture’s recomendations 1.4- Submittals Submit sufficient descriptive literature to demonstrate compliance with these specifications for the following:

Pressure Pipe and fittings Sewer Pipe and fittings. Drain Pipe and fittings.

1.5- Single manufacturer

All pipe of a given type, material, and size shall be the product of a single manufacturer.

1.6- Applicable Codes

AWWA, ASTM, International Plumbing Code, ADEQ, NSF

PART 2 - PRODUCTS

2.1 – Bushings When reducing fittings are required for installation, bushings of the same material as the fitting may be approved by the COR, if space is available.

2.2- Joints between Dissimilar Materials

Use flanges, couplings, unions, or other transition fittings manufactured specifically for the types of pipe being joined and having a minimum pressure rating, or pressure class (as applicable) equal to or greater than the lower pressure rating or class of the pipes being joined. Plastic threaded pipe/fittings shall not be joined directly with metal threaded pipe/fittings

2.3- Pressure Pipe and Fittings

Pressurized water lines and fittings shall conform to the following unless otherwise

SHOWN ON DRAWINGS.

Pipe and Fittings, 3/4” – 4” diameter:

Polyvinyl Chloride: Pipe, couplings, and fittings shall be schedule 40, manufactured of material conforming to ASTM D 1784, Class 12454B, designated as PVC 1120 in ASTM D 1785. PVC pipe and fittings shall be joined using solvent cement. Install PVC, AWWA pipe according to ASTM F645 and AWWA M23.

Polyethylene (PE): Install PE pipe according to ASTM D2774 and ASTM F645. Pipe shall comply with requirements of ANSI/AWWA C901-88. Joining methods and fittings shall be per approved submittal. Flare, insert, compression and fusion type fittings can be employed. If compression fittings are used, they shall be a type with a split clamp.

Pipe and Fittings, 4” and greater diamter:

Polyvinyl chloride: Pipe and fittings shall be elastomeric bell joint with mechanical restraint and shall comply with requirements of ANSI/AWWA C900-

89. Fittings shall comply with the requirements of ANSI/AWWA C110/A21.10- 87.

Ductile Iron: Pipe shall comply with the requierments of ANSI AWWA C151/A21.5. Pipe shall be cement-mortar lined, threaded joint. Fittings shall comply with the requirements of ANSI/AWWA C110/A21.10-87.

2.3 – Sewer Pipe and Fittings

Polyvinyl Chloride: Pipe, couplings, and fittings shall be schedule 80, manufactured of material conforming to ASTM D 1784, Class 12454B, designated as PVC 1120 in ASTM D 1785. Joints shall be solvent cemented.

2.5 – Specialties

Compression Couplings; Elastomeric, Steel, or Cast Iron: Rockwell, Dresser, Muller or approved equal.

Pipe Supports: Cast iron saddle, locknut nipple and reducer to provide vertical adjustment.

Thread Compound and Tape: A lead-free, seize-sealing compound or tape approved for use in joints and threaded parts of potable water systems.

3.1 – Pipe Installation Handle and install pipe in accordance with manufacturer’s Installation Guide and the following:

Placement of Pipe: Place so its full length (except for couplings) bears uniformly on the bedding material. Do not lay pipeline in water. Debris shall not be allowed to accumulate within installed pipes.

Pipe Protection: Keep interior of pipeline and joining surfaces clean. Plug exposed ends of pipe at end of work shifts.

Cutting Pipe: Make all cuts square and ream. Do not use damaged pipe.

Lubricated Joints: Use only non-toxic and water soluble lubricant.

Pipe Alignment and Grade: Where necessary to avoid existing obstacles, pipelines may be realigned slightly. Slope all lines for positive drainage or AS SHOWN ON DRAWINGS.

Do not exceed the manufacturer’s recommended maximum deflection. Deflections in excess of these limitations require special bends or a sufficient number of shorter pipe lengths.

3.6 – Hydrostatic Testing

Perform hydrostatic test of all waterlines. Furnish all equipment necessary for tests. Test as follows:

Preparation: Do not backfill couplings and fittings prior to test. Brace couplings and fittings to prevent movement during testing. Backfill other portions of waterline prior to test so no movement can occur when the line is under pressure.

Allow all thrust blocks in test section to cure for 48 hours, minimum, prior to testing. Flush all pipelines.

Furnish and install all temporary supports, blocking and plugs, necessary to run the test. Remove after testing.

Testing: Perform test in the presence of the COR as follows:

During Normal System Operation; Test each section at system pressure, for a period of 1 hour.

Maximum allowable overall leakage for a test section is: L = NDP, where

L = Allowable leakage, gph N = Number of joints in test section D = Nominal diameter of pipe, inches P = Square root of the average test pressure, psig

Repair any visible leakage at joints and repeat the test. If overall leakage is above maximum allowable, repair the pipeline and repeat the test. Continue this procedure until leakage is within the allowable range.

During System Closure; Test each section at 100 psi of compressed air. Contractor shall provide a gauge to measure static pressure during test. System shall remain pressureized for a minimum of 1 hr, pressure loss during this time shall not be more than 5 psi. If system fails to remain pressurized within acceptable range, contractor shall confirm any potential leaks of completed work by spraying a soapy solution on all new joints. Forming bubbles at joints will indicate a leak and contractor will be responsible for making repairs until no evidence of leaks are detected

PART 4 – MEASUREMENT AND PAYMENT

4.1 – Measurement

The work specified herein will not be measured for payment.

4.2 – Payment This work is incidental to other items in this contract and direct separate item payment will not be made.

END OF SECTION 330500

DIVISION 33 - UTILITES

VALVES AND HYDRANTS - 331419

PART 1 - GENERAL

1.1 - Description This section specifies the furnishing and installation of valves.

1.2-Quality Assurance All work shall be completed by a licensed plumber and shall comply with International Plumbing Code.

1.3- Working Pressure

150 psi minimum for all valves 1.4- Submittals Submit sufficient descriptive literature to demonstrate compliance with these specifications for each type and brand of valve being furnished.

PART 2 - PRODUCTS

2.2 – Curb Stop Valve

Curb Stop valve and body shall be brass construction.

Joints shall be threaded or compression style. Threaded joints are allowed for metallic threaded pipe only, no plastic-metal threaded joints will be allowed. Compression/Clamp style joints shall utilize EPDM gasket at pipe-valve interface Valves shall be designed to shut off pressure from both directions.

All valves shall be installed in accordance with manufacture’s recommendations.

All Curb Stops shall be accessible through Valve Boxes. If existing valve boxes cannot be salvaged for reuse, new 9” diameter x 2’ deep, cast iron valve boxes shall be furnished and installed by contractor, at no additional cost to government.

2.3 – Backflow Preventer

Ductile iron valve body with corrosion resistant exterior coating. Stainless steel internals. Conforming to AWWA C510

4” Wilkins Zurn 350A double check valve assembly, with OS&Y flanged gate valves on inlet and discharge, or approved equal

3.1 – Installation Old valve assemblies shall be removed and remaining pipe stubs shall be cleaned of debris. Damaged pipe shall be removed.

Existing valve boxes in good condition may be reused

Install valves according to manufacturer’s installation recommendations and the following:

Curb Stop: Install valves horizontal to pipelines with valve stems vertical and facing upward. Valve box shall be installed plumb, directly centered over valve stem. Top of valve box shall be placed 2 inches above finished grade.

Backflow Preventer: Contractor should utilize existing vault and water lines for installation. Contractor is responsible for confirming direction of flow with COR prior to installation.

3.2 – Demolition and Disposal Existing control valves and damaged waterlines to be removed shall be disposed of properly by Contractor.

Existing backflow preventer assembly to be removed (including gate valves on inlet and discharge) shall remain property of the Government and shall be left in a secured location on-site.

PART 4 – MEASUREMENT AND PAYMENT

4.1 – Measurement Measurement will not be made for items in this section.

4.2 – Payment Payment for these items will not be made separately. Cost associated with items in this section is considered incidental and should be included with other associated pay items.

END OF SECTION 331419

image4.png image5.png image6.jpeg image7.jpeg image8.jpeg image9.jpeg image10.jpeg image11.jpeg image12.jpeg image13.jpeg image14.jpeg image15.jpeg image16.jpeg image17.jpeg image18.jpeg image19.jpeg image20.jpeg image21.jpeg image22.jpeg image23.jpeg image24.jpeg image25.jpeg image26.jpeg image27.jpeg image1.png image2.png image3.png