Solicitation_Body.pdf

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SECTION B

Cortina Rancheria Project CA 11-M62

The following Bid Schedule is based on estimated quantities required to meet the specifications. The total extended prices shall be used for quote evaluation purposes only. The actual amount to be paid by the Government under the contract shall be computed on the actual quantities installed at the unit prices awarded. The designated ordering office is the Contracting Office, Indian Health Service, California Area Office, Sacramento, California.

UNIT TOTAL

ITEM DESCRIPTION QTY UNIT PRICE PRICE

DIVISION 2 - Site Work

1 Mobilization & Demobilization 1 LS

Section 02100

2 Water Main 50 LF

Section 02667

3 2" Gate Valve 1 EA

4 Water Meters for Individual homes 6 EA

5 Connection to Existing Water main 1 EA

6 Well Drilling 400 LF

Section 02670

7 Geophysical Logging 1 LS

8 Aquifer Testing 1 LS

9 PVC Well Casing-6 in. 280 LF

10 Well Grouting 50 LF

11 Stainless Steel Well Screen 120 LF

12 Gravel Pack 190 LF

13 Formation Stabilizer 150 LF

14 Well Development 4 HR

15A Test Pumping 20 HR

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15B Recovery Measurements 4 HR

16 Well Disinfection and Water Analysis 1 EA

17 Well Testing and Chemical Analysis 1 EA

18 Well Abandonment 200 LF

19 PVC Drop Pipe-2in. With Sub Cable 400 LF

20 Submersible Pump 1 LS

21 Enclosure System 1 EA

DIVISION 16 - Electrical

22 Buried Electrical Cable 50 LF

Section 16100

Total Quote

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SECTION C

SPECIAL PROVISIONS

C.1 SCOPE OF WORK

The work to be done under this contract consists of construction of a new pump house building on structural fill to house water treatment equipment, a new water transmission line to connect the pump house to the upper storage tank, treatment equipment, booster pumps, aeration tank, controls and telemetry system, water service lines, miscellaneous piping and other required appurtenances in accordance with the attached drawings and specifications.

C.2 SITE CONDITIONS

The Contractor shall determine actual site conditions with regard to surface vegetation and other miscellaneous obstacles to construction. The Contractor shall perform, at no additional cost, all necessary clearing, grubbing, and disposal of these and other obstacles in order to do work required by the contract.

Locations, materials, and sizes of any utilities shown are approximate only and are not meant to be a complete representation of all utilities actually present. The Contractor shall determine exact locations and details from the responsible utility authority.

C.3 CONTRACT DOCUMENTS

A maximum of 5 sets of contract drawings and specifications will be furnished without charge to the Contractor at award of this contract, except applicable publications incorporated by reference which will be furnished on request at the cost of reproduction.

C.4 DAYS OF WORK

Construction work shall not be normally permitted on Saturdays, Sundays, or Federal holidays.

The Contractor may submit a written request to the Project Engineer for permission to work on any Saturday, Sunday, or Federal holiday. Written approval from the Contracting Officer must be obtained before the Contractor may work on any such day.

C.5 LAWS AND PERMITS AFFECTING WORK

The Contractor shall at all times observe and comply with Federal, State, City, and County laws, Tribal ordinances and regulations which in any manner affect the conduct of the work; and all such orders and decrees as exist at the present and which may be enacted later by legislative bodies or tribunals having legal jurisdiction or authority over the work. All other required permits, certificates and licenses shall be obtained by and at the expense of the Contractor. No

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13-235-SOL-00005 Page 7 of 73 pleas of misunderstanding or ignorance thereof will be considered. The Contractor shall be wholly responsible for any claim or liability arising from or based on the violation of any such law, ordinance, regulation, order or decree.

C.6 RIGHTS-OF-WAY

The Government shall obtain from the Tribe rights-of-way and easements necessary to install facilities located specifically by the plans and specifications.

C.7 MAINTENANCE OF UTILITIES AND SITE FACILITIES

The Contractor is responsible to determine the exact location of any and all utilities not specifically located on the plans and to protect them from damage during construction. Should any utility be damaged or disturbed, the Contractor shall immediately notify the Project Engineer and the owner of the damaged utility. Any and all damage that results from work under the contract shall be promptly repaired at the expense of the Contractor.

During the progress of work, the Contractor shall protect all existing vegetation, structures, sidewalks, streets, mailboxes, ditches, culverts, signposts, fences, driveways, and similar items.

If the Contractor must remove or disturb these facilities, provision shall be made to maintain a temporary facility serving the same purpose as that which it was intended to replace. Destruction of vegetation shall be kept to a minimum. Upon completion of the work, the Contractor shall restore all such facilities to a condition at least equal to that existing prior to construction. The Contractor shall not obstruct access to the site.

The Contractor shall perform his work at all times in a manner to ensure minimal obstruction to traffic and minimal inconvenience to the general public.

C.8 CONTRACT SUBMITTAL REQUIREMENTS

The Contractor shall furnish material submittals, design submittals, shop drawings, test reports, and as-built drawings in accordance with the requirements detailed in the Contract Submittal Requirements section.

C.9 CLEANUP AND FINISH GRADING

The Contractor shall restore all areas disturbed by construction to a condition at least equal to that existing prior to construction. Excess construction materials, equipment, tools, waste excavation, and rubbish shall be removed. Excavated areas shall be finish graded to provide drainage as required by the drawings and specifications, or in the absence of specific requirements, to provide drainage away from the facilities constructed and to provide drainage

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13-235-SOL-00005 Page 8 of 73 away from excavated areas and installed facilities. Where a lawn is disturbed, the Contractor shall place a generous amount of grass seed to the disturbed area following final grading.

C.10 MEASUREMENT AND PAYMENT

As line item quantities are estimates, contractor will be paid full compensation based upon the actual quantities utilized/completed and verified by the Engineer. The price paid for the completed item of work shall include full compensation for furnishing all labor, materials, tools, equipment, and performing all work required by the provisions of the contract to furnish and install the items of work, completed in place. In all cases, the finished product shall be a complete, operational system or component. The price for the completed item of work shall also include all applicable state and local sales or other taxes.

C.11 TECHNICAL PROVISIONS

Section Number Title Page

02100 Mobilization and Demobilization 9

02220 Excavation, Trenching and Backfilling 11

02667 Water Mains 18

02670 Water Well 25

03300 Concrete 46

16100 Electrical 54

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SECTION 02100

MOBILIZATION & DE-MOBILIZATION

PART 1 GENERAL

1.1 SECTION INCLUDES

A. This section includes mobilization and demobilization to and from jobsite.

1.2 UNIT PRICE - MEASUREMENT AND PAYMENT

A. Mobilization and De-mobilization: Paid by the lump sum. Includes all labor equipment and materials to mobilize and demobilize to and from the project site to complete the work outlined in the contract documents and for temporary facilities and controls as required. Note: There shall only be 1 (one) payment paid for mobilization and demobilization for this contract and it shall be limited to no more than 10% of the bid amount.

1.3 RELATED SECTIONS

A. Section 02110 – Site Clearing

B. Section 02200 – Excavating, Trenching and Backfilling

PART 2 PRODUCTS

NONE

PART 3 EXECUTION

3.1 PREPARATION

A. Make arrangements to contact all public works departments and Tribal Business Center prior to mobilizing on job site location, coordinating a materials/equipment yard, and ensure all necessary permits are secured prior to performing work.

B. Notify Engineer 48 hours in advance prior to mobilization to job site location.

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3.2 MOBILIZATION

A. Move materials, equipment, and laborers as necessary to job site location with minimal disturbance.

3.3 DE-MOBILIZATION

A. Remove all materials, equipment, laborers, solid waste, and debris created by construction activities from job site location.

B. Maintain minimal disturbance to site upon departure.

END OF SECTION 02100

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SECTION 02200

EXCAVATING, TRENCHING AND BACKFILLING

A. This Section includes regulatory requirements, protection, imported pipe embedment, excavation, backfilling, compaction, quality control, and restoration.

A. Work required under Section 02200 shall be merged with pay item defined within the Measurement and Payment portion of other Sections of this contract.

A. Section 02110 - Site Clearing

B. Section 02667 – Water Mains

1.4 REFERENCES

A. ASTM C136 - Method for Sieve Analysis of Fine and Coarse Aggregates.

B. ASTM D698 - Test Methods for Moisture-Density Relations of Soils and

Soil-Aggregate Mixtures, Using 5.5 lb Rammer and 12 inch Drop.

C. ASTM D1556 - Test Method for Density of Soil in Place by the Sand-Cone

Method.

D. ASTM D1557 - Test Methods for Moisture-Density Relations of Soils and

Soil-Aggregate Mixtures Using 10 lb Rammer and 18 inch Drop.

E. ASTM D2922 - Test Methods for Density of Soil and Soil-Aggregate in Place by

Nuclear Methods (Shallow Depth).

F. ASTM D3017 - Test Methods for Moisture Content of Soil and Soil-Aggregate

Mixtures.

G. ASTM D4829 - Test Methods for Expansion Index of Soils

H. California State Labor Code Section 6705

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1.5 REGULATORY REQUIREMENTS

A. Obtain an Encroachment/Trenching Permit from the local roads authority prior to construction. Comply with the requirements of the encroachment/trenching permit.

B. In accordance with the requirements of Section 6705 of the Labor Code of the

State of California, submit a detailed plan to the Engineer before excavation, showing the design of shoring, bracing, sloping, or other provisions to be made for worker protection from the hazard of caving ground during the excavation of any trench or trenches 5 feet or more in depth.

C. Submit the plan to the Project Engineer prior to start of excavation.

1.6 DEFINITIONS

A. Utility: Any buried pipe, duct, conduit, or cable.

B. Structure: Foundation, manhole, septic tank, cleanout, catch basin, or culvert.

1.7 FIELD MEASUREMENTS

A. Verify that survey benchmarks, control points, and intended elevations are as shown on drawings.

1.8 PROTECTION

A. Barricade open excavations.

B. Protect structures, utilities, sidewalks, pavements, and other facilities from damage caused by settlement, lateral movement, undermining, washout, and other hazards created by earthwork operations.

C. Provide safe conditions for workers and passers-by.

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2.1 IMPORTED PIPE EMBEDMENT

A. Use crushed stone or gravel that is free of shale, clay, friable material, and debris.

Grade in accordance with ASTM C136, within the following limits:

Sieve Size Percent Passing

1 in 100 3/4 in 90 to 100 3/8 in 20 to 55

#4 0 to 10 #8 0 to 5

2.2 IMPORTED STRUCTURAL FILL

A. Use imported soil (if required) that has angular fragments and a low expansion index (less than 30 per ASTM D 4829). Use imported fill that complies with the requirements of Caltrans Class 3 Aggregate Sub-base:

3 in 100

2.5 in 90 to 100

# 4 50 to 100 # 200 15 to 40

2.3 DRAINAGE ROCK

2 in 100

3/4 in 35 to 70 # 4 0 to 5

3.1 PREPARATION

A. Notify Underground Service Alert (800) 227-2600 in Northern and Central California and (800) 422-4133 in Southern California prior to excavation.

Comply with their notice requirements.

B. Identify required lines, levels, contours, and datum locations.

C. Protect plant life, lawns, rock outcropping, and other features remaining as final landscaping.

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D. Protect benchmarks, existing structures, fences, and paving from excavating equipment and vehicular traffic.

E. Maintain and protect utilities and structures which are to remain.

3.2 EXCAVATION

A. Use open cut method on all excavation unless otherwise shown on the drawings, required by permit, or approved in writing by the Project Engineer.

B. Stockpile excavated material in designated area on site, and remove excess material from site.

C. Grade top perimeter of excavation to prevent surface water from entering.

3.3 CLASSIFICATION OF EXCAVATION

A. All excavation with equipment commonly used in the industry is classified as common excavation (except for drilling and blasting).

3.4 TRENCH EXCAVATION

A. Cut trenches sufficiently wide to enable installation and inspection. Remove water or materials that interfere with work.

B. Maintain trench sides as vertical as possible - between 12 inches and 24 inches wider than the outside diameter of the pipe barrel - below pipe level.

C. Excavate trench width above the pipe as wide as necessary for shoring, sheeting, and installation.

D. Center trench excavation on pipe alignment for a minimum clearance of 6 inches on each side of the pipe.

E. Hand trim for bell and spigot pipe joints. Remove loose matter.

F. Restore over-excavated areas. If the trench bottom is over-excavated below the intended grade, fill over-excavation with imported pipe embedment and compact to density equivalent to the in situ material.

G. Remove lumped subsoil, boulders, and rock up to ½ yd3 (measured by volume).

H. Excavate for additional trench depth when soil prevents adequate pipe support.

Refill addition with imported pipe embedment. Remove large rock, boulders, and

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13-235-SOL-00005 Page 15 of 74 large stones to provide 3 inches of soil cushion on all sides of the pipe and pipe accessories.

I. Length of trench that may be left open at any one time is 100 yards. Do not leave trench open overnight.

J. Stockpile excavated material in designated area on site, and remove excess material from site.

3.5 STRUCTURE EXCAVATION

A. Excavate for structures down to the levels indicated on the drawings. Excavate as large as necessary to accommodate the work forms. Comply with all safety regulations.

B. Excavate a sufficient distance from walls and footings to provide forming except where concrete for walls or footings is directly against excavated surfaces.

C. Do not excavate below depths indicated in the drawings. Restore over-excavated areas to proper elevation by filling with imported structural fill. Do not interfere with 45 degree bearing splay of foundations.

D. Hand trim the bottom of the excavation to prevent disturbing the soil below the required depth.

3.6 BACKFILLING

A. Use care to prevent disturbance or damage to utilities or structures in trench.

B. Maintain optimum moisture content to attain required compaction density.

C. Remove surplus fill materials from site.

D. Leave fill material stockpile areas free of excess fill materials.

3.7 TRENCH BACKFILLING

A. Use excavated soil as embedment unless Project Engineer determines it unsuitable. Unsuitable material is defined as incapable of being compacted to specified density with optimum moisture content, solid or loose rock, lump material larger than 1 inch, organic matter, or debris.

B. Use excavated soil as final backfill unless Project Engineer determines it unsuitable. Unsuitable final backfill material is solid or loose rock larger than 6 inches or lumps larger than 3 inches. Do not use organic matter or debris.

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C. Backfill pipe embedment material in uniform layers on all sides of the pipe in lifts not to exceed 6 inches.

D. Use the following methods when placing final backfill material unless otherwise required by permits or authority.

Compact Not to Exceed (In loose measure) Roadways 6 inches thick

Rights-of-way and outside roadway 12 inches thick Unimproved surfaces 24 inches thick

3.8 STRUCTURE BACKFILLING

A. Place structure fill material in uniform layers on all sides of the structure 6 inches thick.

B. Do not fill structure material until the structure footing or other portions of the structure have been inspected

C. Use excavated soil as final backfill material unless Project Engineer determines it unsuitable. Unsuitable final backfill material is solid or loose rock larger than 6 inches or lumps larger than 3 inches. Do not use organic matter or debris.

3.9 COMPACTION

A. Compact final backfill to the percentage of maximum density determined by ASTM D1557 unless otherwise specified by permit or authority.

Percent of Maximum Density

Location Bedding Haunching Initial Backfill Final Backfill Roadways, Improved Surfaces

95 95 95 95

Roadway Rights-of- Way Outside of Roadway Prism

90 90 90 90

Unimproved Surfaces, Fields, Etc.

90 90 80 80

Backfill Around Structures

95 95 95 95

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3.10 FIELD QUALITY CONTROL

A. The government, at its discretion, may acquire the services of a certified soils testing laboratory to perform baseline Modified Proctor density tests in accordance with ASTM D1557 or latest revision:

1. Tests may be performed at locations approved by Project Engineer.

2. Test results from tests prior to construction will be made available to the contractor.

3. Testing is at the government's expense.

B. Compaction testing will be determined at the Project Engineer's discretion.

C. If work does not meet specified requirements, remove, replace, and retest. All re-testing is at the contractor’s expense.

3.11 PROTECTION OF FINISHED WORK

A. If vehicular traffic has altered finished work, reshape and re-compact fills.

3.12 SIDEWALK, CURB AND GUTTER RESTORATION:

A. Restore the sidewalks, curbs, and gutters to their original condition. Comply with the standards and construction requirements of the local authority.

B. Machine compact backfill under the sidewalk as follows:

1. Cut the existing curb or sidewalk to a neat line.

2. Match the depth of base course material with that present under adjacent curbs or sidewalks.

3. Match to the existing concrete walk in width, thickness, slope, and finish, but not less than 4 inches in thickness.

4. Use wire mesh reinforcement; 6 inch by 6 inch.

END OF SECTION 02200

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SECTION 02667

WATER MAINS

A. This section includes water pipe, gate valves, preparation, bedding, installation, and disinfection.

A. PVC Water Main: Paid by the linear foot, measured to the nearest foot. Includes trench excavation, placement of bedding material, hand trimming, pipe, fittings, thrust blocks, water main metallic tracer tape, marker posts, backfilling, as-builts, site cleanup, and all appurtenances not otherwise specified in the bid schedule.

B. Gate Valve and Box: Paid by the unit, measured to the whole unit. Includes excavation, gate valve, gate valve key, box, thrust blocks, protection posts, backfilling, as-builts, site cleanup, and other appurtenances as necessary.

C. Water Meters for home connections: Paid by the unit measured to the whole unit.

Includes excavation, backfilling, as-builts, site cleanup, and other appurtenances as necessary.

D. Connection to Existing Water Main: Paid by the unit, measured to the whole unit.

Includes excavation, removal and disposal of existing water main and fittings, locating existing valves, draining existing water mains, coordinating shut-down with local utility authority, fittings, backfilling, as-builts, site cleanup and other appurtenances as necessary.

A. Section 02200 - Excavating, Trenching and Backfilling

B.. Section 02675 - Disinfection of Water Main System

A. ASTM D1785 - Poly (VinylChloride) (PVC) Plastic Pipe, Schedules 40, 80, and 120.

B. ASTM D2241 - Poly (VinylChloride) (PVC) Plastic Pipe (SDR-PR).

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C. ASTM D2466 - Poly (VinylChloride) (PVC) Plastic Pipe Fittings, Schedule 40.

D. ASTM D2855 - Making Solvent-Cemented Joints with Poly (Vinyl Chloride)

(PVC) Pipe and Fittings.

E. ASTM D2239 - Polyethylene (PE) Plastic Pipe (SDR-PR) Based on Controlled

Outside Diameter.

F. ASTM D3139 - Joints for Plastic Pressure Pipes using Flexible Elastomeric Seals.

G. AWWA C104 - ANSI Standard for Cement-Mortar Lining for Ductile-Iron Pipe and Fittings for Water.

H. AWWA C105 - ANSI Standard for Polyethylene Encasement for Ductile-Iron

Pipe Systems.

I. AWWA C111 - ANSI Standard for Rubber-Gasket Joints for Ductile-Iron

Pressure Pipe and Fittings.

J. AWWA C151 - ANSI Standard for Ductile-Iron Pipe, Centrifugally Cast, for

Water.

K. AWWA C509 - Resilient-Seated Gate Valves for Water Supply Service.

L. AWWA C515 – Reduced Wall, Resilient-Seated Gate Valves for Water Supply

Service.

M. AWWA C900 - Polyvinyl Chloride (PVC) Pressure Pipe, and Fabricated Fittings, 4 In. Through 12 In. (100 mm Through 300 mm), for Water Distribution.

N. AWWA C901 - Polyethylene (PE) Pressure Pipe and Tubing, ½ In. (13 mm)

Through 3 In. (76 mm), for Water Service.

1.5 QUALITY ASSURANCE

A. Pipe: Perform Work in accordance with manufacturer's recommended procedures.

B. Valves: Mark manufacturer's name and pressure rating on valve body.

1.6 DELIVERY, STORAGE, AND HANDLING

A. Deliver, store, and protect products to site.

B. Deliver and store valves in shipping containers with labeling in place.

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2.1 WATER PIPE

A. Manufacturers: Certainteed, Diamond Plastics, Johns Manville, PW Pipe, or equal.

B. PVC Pipe: AWWA C900, elastomeric-gasket couplings, Class 100, 150, or 200 as shown on the drawings or bid schedule.

1. Fittings: AWWA C111, rubber-gasket joints, Ductile-Iron

2. Joints: ASTM D3139 compression gasket ring.

3. Trace Wire: Magnetic detectable conductor, plastic covering, imprinted with “Water Line” in large letters.

C. Ductile Iron Pipe: AWWA C151, pressure class 350, centrifugally cast in metal molds or sand-lined molds, or C104, cement-mortar lining, as shown on the drawings or bid schedule.

1. Fittings: Ductile iron, standard thickness.

2. Joints: AWWA C111, rubber-gasket joints with rods.

3. Jackets: AWWA C105 polyethylene encasement, double layer, half lapped, ½-inch polyethylene tape.

2.2 GATE VALVES

A. Manufacturers: American Darling, Mueller, Clow, or Waterous, or equal.

B. Meet or exceed either AWWA C509 or C515, resilient seated gate valves 2 inch through 12 inch NPS, ductile iron body, trim, non-rising stem with square nut, single wedge, mechanical joint, flanged, or slip-on ends as specified in drawings, control rod, and extension box.

C. Furnish one valve key per contract or delivery order as applicable.

2.3 GATE VALVE BOX

A. Manufacturer: Tyler Pipe or equal.

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B. Cast iron and of the sliding type, sized for use with the appropriate valve. Box lid marked "WATER." Box shall extend from the body of the valve to the finished grade and be locking.

2.5 ACCESSORIES

A. Provide all necessary assembly bolts, washers, and nuts, thrust blocks, supports, gaskets, flanges, and all other appurtenant items shown on the Drawings, specified or required for the proper installation and operation of the piping and devices included in or on the piping, equipment and piping accessories.

B. Marker Post

1. Manufacturers: Bernsten

2. Aluminum post model no. A1NBF60-OS with stampable cap.

3. Post may be 3 inch galvanized pipe filled with concrete and with stamp-able aluminum cap set in concrete.

C. Protection Post

1. Black iron, 3 inch diameter, 6 feet long, buried 3 feet.

2. Cover each post above grade with 2 coats of yellow reflectorized paint or tape for a band 3 inches wide at the top.

3. Metallic Tracer Tape, magnetic detectable conductor, plastic covering, imprinted with "Water Line" in large letters.

D. Thrust Blocks: Refer to Section 03300 (Cast-In-Place Concrete).

E. Locating Wire: Solid copper No. 10, soft drawn insulated wire, Type THHN

F. Polyethylene encasement shall comply with AWWA C105.

3.1 EXAMINATION

A. Verify existing water main size and location.

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3.2 PREPARATION

A. Cut pipe ends square, ream pipe and tube ends to full pipe diameter, and remove burrs.

B. Remove scale and dirt on inside and outside before assembly.

C. Prepare pipe connections to equipment with flanges or unions.

3.3 BEDDING

A. Excavate pipe trench in accordance with Section 02200 (Excavating, Trenching and Backfilling). Hand trim excavation for accurate placement of pipe to elevations indicated.

B. Backfill around sides and to top of pipe with bedding material and tamp in place.

C. Maintain optimum moisture content of bedding material to attain required compaction density.

3.4 INSTALLATION - WATER MAIN

A. Maintain separation distances of water main from sewer pipe as per Title 22 of the California Environmental Health Code.

B. Route pipe in straight line.

C. Install pipe to allow for expansion and contraction without stressing pipe or joints.

D. Install access fittings per Section 02675 (Disinfection of Water Main System).

E. Form and place concrete for thrust restraints at each elbow or direction change of pipe main.

F. Establish elevations of buried piping to ensure not less than 30 inches of cover.

G. Install Metallic Tracer Tape buried continuously at 12 inches below finish grade.

H. Backfill per Section 02200 (Excavating, Trenching and Backfilling).

I. Install marker post at all bends, gate valves…etc as shown on in the detail.

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3.5 VALVE INSTALLATION

A. Set valves on solid bearing.

B. Install thrust blocking and rebar as shown in the drawings.

C. Center and plumb valve box over valve. Set box cover as specified in drawings.

3.6 VALVE BOX INSTALLATION

A. Firmly support, center, and set valve box plumb over the wrench nut of the gate valve.

B. Pour a concrete collar around the top of the valve box and mark clearly to show direction of pipeline and the size (diameter) of the pipe.

3.7 OTHER COMPONENT INSTALLATION

A. All components shown on the plans shall be installed per the details and the project manual specifications.

B. Place marker posts and concrete collars as shown on the plans.

3.8 CONNECTION TO EXISTING WATER MAINS

A. Make the necessary arrangements with the owner of the existing utility prior to any connections to any water mains.

B. Do not start work until all the materials, equipment, and labor have been assembled on the site. When work is started on a connection, proceed continuously without interruption, and as rapidly as possible until completed.

C. If the connection to the existing system involves turning off the water, notify affected customers 24 hours in advance. No shutoff of mains will be permitted overnight, over weekends, or on Federal holidays. Water shut-off is limited to 4 hours maximum.

D. Make connections to existing water mains in a neat, workmanlike manner to suit actual conditions encountered at the existing main. Adhere to manufacturer's recommendation to avoid damage to pipe coating when wet or dry tapping. Leave a smooth end at right angles to the axis of the pipe.

E. Prevent the existing main from being contaminated when making the connection.

Take all action necessary to prevent trench water, mud or other contaminants from entering the connection line or main at any time.

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3.9 DISINFECTION OF WATER MAIN

A. Flush, disinfect, and pressure test system per Section 02675 (Disinfection of Water Main System).

3.10 FIELD QUALITY CONTROL

A. Government may perform compaction tests per ASTM D1557 when desired. Cost of testing will be at government expense. If compaction is not in accordance with specifications, retesting will be done at Contractor’s expense.

B. Contractor is responsible for removing, replacing, and retesting all work that does not meet specified requirements. This applies even if a government representative was present during installation.

END OF SECTION 02667

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SECTION 02670

WATER WELL

A. General and Performance Requirements

B. Drilling and well construction

C. Test pumping

D. Well disinfection and water analyses

A. WELL DRILLING is paid by the vertical foot of well depth and includes:

Drilling, formation sampling, and related items not specifically paid for in other bid items.

B. GEOPHYSICAL LOGGING is paid by the lump sum as specified in the bid schedule and includes: Site access (off road locations), all set-up, take-down, and transportation costs of logging equipment to and from each site, calibration and standardization, logging, logs, geophysical log interpretations and geophysical log interpretation report.

C. AQUIFER TESTING is paid by lump sum as specified in the bid schedule and includes taking water quality samples of each water bearing formation and providing a field test of the following parameters including pH, Chloride, Hardness, Sodium, Turbidity, TDS, Iron, Manganese, Flouride, and Conductance.

The contractor shall also estimate flow quantity from each water bearing formation.

D. WELL CASING is paid by the vertical foot of casing depth and includes: Casing, drive shoes, and other incidentals required for complete installation. No payment shall be made for surface casing of a larger diameter used as a temporary construction aid.

E. WELL GROUTING is paid by the vertical foot and includes: Materials, placement of grout in the annular space between the well casing, and drilled hole.

F. STAINLESS STEEL WELL SCREEN shall be paid by the vertical foot of screen installed as specified in the bid schedule and includes: Well Screen, sieve analysis

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13-235-SOL-00005 Page 26 of 74 and sizing, seals, couplings, and other incidentals required for the installation of the well screen. End fittings, blank portions, or seals are not to be used to determine measurement or vertical foot of screen installed.

G. GRAVEL PACK shall be paid by the vertical foot as specified in the bid schedule and includes unerreaming, filter material selection, formation stabilization, placement of the filter material in the annual space between the well screen and the drilled borehole, disinfection and other related work.

H. FORMATION STABILIZER shall be paid by the vertical foot as specified in the bid schedule and includes: Equipment, stabilizer material, set up time, placement seals and other related work.

I. WELL DEVELOPMENT is paid by the hour as stated in the bid schedule. Time required for hauling water, rigging up, running tools, and other preparatory and disassembly work is not included in the basis for payment. Neither bailing nor pumping will be considered development.

J. TEST PUMPING is paid by the hour and includes: All necessary equipment, tools, labor, measuring instruments and pumping equipment capable of pumping the discharge rates shown on the bid schedule. The pumping unit shall be complete with ample power source, controls and appurtenances.

K. TEST PUMP RECOVERY shall be paid by the hour as specified in the bid schedule and includes all necessary labor, equipment, tools and measuring instruments capable of measuring the recovery rate of the well after test pumping.

L. WELL DISINFECTION AND BACTERIOLOGICAL ANALYSES is paid by the unit and includes: Supplies, labor, equipment, sampling, laboratory fees, and incidentals for the water quality analysis and the bacteriological testing.

M. WELL QUALITY TESTING AND CHEMICAL ANALYSIS shall be paid on a lump sum basis and shall be considered full compensation for all labor, materials and equipment required for disinfection, flushing and collection of samples and analysis of samples at an EPA certified laboratory.

N. WELL ABANDONMENT shall be paid by the vertical foot as specified in the bid schedule and includes all necessary labor, equipment, tools, concrete, grout, clay, perforation and other related work necessary for well abandonment.

O. DROP PIPE and SUBMERSIBLE CABLE: By the vertical foot of drop length as indicated in the bid schedule and includes: Drop pipe, 1” sounding tube, vent, submersible cable, electrical wiring & connections, sanitary well seal, check valves, and adapters.

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P. SUBMERSIBLE PUMP: By the unit for the specified submersible pump as indicated in the bid schedule and includes: Material & installation of submersible pump, pump control box, 5 year pump warranty, and all other electrical appurtenances.

Q. ENCLOSURE SYSTEM: By the unit as stated in the bid schedule and includes:

Materials and installation of the enclosure and concrete slab, gate valve, hose bib with vacuum/backflow preventer, check valve, pressure gauge, flow meter, pressure relief, plumbing, conduit/cable, circuit breaker load center, pump protection, lightning arrestor, receptacle, buried electrical conduit/cable two feet beyond the edge of well slab, trenching, backfilling, and all other fittings and incidentals.

A. 02110 - Site Clearing

A. AWWA A100 – Standard for Water Wells

B. AWWA B301 – Standard for Liquid Chlorine

C. California Well Standards Bulletins 74-81 and 74-90

1.5 GENERAL

A. The well shall be drilled by conventional mud rotary or air rotary. Equipment used shall be in good condition and capable of drilling to a depth of at least 500 feet.

B. Drill hole at location staked by the Project Engineer.

C. Drill no deeper than directed by the Project Engineer. If a satisfactory yield is obtained at a lesser depth, the drilling shall be terminated and the well developed at the depth.

D. Grout Seal: The annular space to be grouted should be not less than a nominal 2" in radius. The length of grout seal (including any surface seals) should be whatever is necessary to prevent the entrance of surface water or undesirable subsurface water into the well. The length of seal must not be less than the minimum specified in the state or locally applicable construction codes.

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1.6 PERFORMANCE REQUIREMENTS

A. Well yield will be determined by geologic conditions. The expected combined minimum yield for the permanent production wells is 15 gpm (gallons per minute).

B. Maximum sand suspended in delivered water: 2 ppm.

1.7 SUBMITTALS

A. WORK PLAN: The Contractor shall submit a work plan to the Project Engineer.

This work plan shall include the following: proposed drilling method and equipment; proposed method of setting the casing, and grout; methods and equipment for developing and test pumping the well; and details of specific methods to be used to control potential contamination or pollution arising from well installation activities. The Contractor shall not perform work until a drilling plan for the well has been submitted to and approved by the Project Engineer.

B. DAILY DRILLER’S REPORT: The Contractor shall submit copies of all the daily driller’s reports one week after completion of the well. The detailed driller’s report shall be maintained on-site and furnished to the Indian Health Service upon request.

C. DRILLER’S LOG: The Contractor shall submit a completed driller’s log within one week of completion of the well. The Contractor shall use the State of California Department of Water Resources Water Well Driller’s Report form.

D. TEST PUMPING DATA: Test pumping data shall be submitted to the Project

Engineer within 72 hours following the conclusion of each pump test.

E. GEOPHYSICAL LOGGING: Contractor shall submit a copy of the geophysical logging test results and the log interpretation report to the Project Engineer within 72 hours following completion of the logging.

F. AQUIFER TESTING PLAN: Contractor shall provide an aquifer testing plan of how they are going to take water quality samples of each water bearing formation.

G. WATER QUALITY TESTING/CHEMICAL ANALYSIS: Contractor shall submit lab test results and summarize results on forms provided in Exhibits. The Contractor shall be responsible for both the water quality testing and bacteriological testing.

H. SUBMERSIBLE WELL PUMP AND DESIGN: Contractor shall submit well pump design along with pump curves and this must be approved by project engineer prior to purchase

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1.8 QUALITY ASSURANCE

A. Perform work in accordance with AWWA A100 and California Well Standards Bulletins 74-81 and 74-90.

B. Drilling Firm: Requires a company specializing in work required of this section with a minimum of 3 years documented experience.

C. Submit proof of California Class C-57 license to perform this work.

2.1 MATERIALS

A. WELL CASING: Seamless or electric resistance welded stainless steel pipe conforming to ANSI Type 304 stainless steel. All pipe shall be manufactured in the United States. Manufacturer rejected pipe shall not be used.

B. DRIVE SHOES: Heat-treated SAE 1040 steel ring or equivalent.

C. WELL SCREEN:

1. Design: Continuous slot, outer windings welded to longitudinal bars.

2. Materials: ANSI Type 304 stainless steel.

3. Length: As directed by the Project Engineer.

4. Fittings: The type of bottom fitting depends on the method of screen installation. The fitting must close off the bottom of the screen and shall be of mild steel. The packer shall be self-sealing neoprene with a mild steel or stainless steel collar.

5. Welding Rod: Stainless to Stainless – AWS rated E308-15 electrodes;

Mild Steel to Stainless – AWS rated E312 or E309 electrodes.

6. Riser: Install a 6-foot minimum riser pipe on the top of the screen and a 5-foot capped extension pipe to the bottom of the screen.

7. Slot Size: The screen shall be sized to permit the maximum practical sand-free yield after development. The size of the slot shall be based on the sieve analysis.

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8. Placement: The length of the screen shall depend upon the type and thickness of the aquifer encountered. Screen length shall limit the entrance velocity to a maximum of 0.1 feet per second. The screen opening size, length and diameter shall be approved by the Project Engineer before ordering or placing the screen.

9. Manufacturer: Johnson Well Screens, Howard Smith Company or equal.

D. GROUT:

1. Cement:

a. Portland Cement: ASTM C150 Type 1 or Type 3. Water of drinking water quality, free of oil and organic matter. Mixture:

One 94-lb sack of Portland cement per six (6) gallons of water. Up to 5% bentonite clay may be added to reduce shrinkage and improve fluidity.

b. Sand Cement: Mixture: 188 lbs of sand per one 94-lb sack of

Portland cement and 7 gallons of water.

2. Bentonite:

a. Wet Bentonite: Manufacturer – Wyo-Ben Enviroplug Grout, Grout Well, Grout Well DR or equal. Do not apply dry.

b. Dry Bentonite: Manufacturer – Wyo-Ben Enviroplug Medium

Benonite Chips or equal.

c. Do not use where structural strength of seal is required.

d. Do not use for sealing highly unstable unconsolidated material that could collapse and displace the sealing material.

e. Used drilling mud and/or cuttings from drilling shall not be used in the sealing material.

E. DRILLING FLUIDS: Water based or natural drilling fluids.

F. CHEMICALS: AWWA B301, Liquid Chlorine.

G. GRAVEL PACK: Well rounded, fine sand with a uniformity coefficient of 2.5 or less of water-washed quartz or granitic gravel. The gravel shall be sized and graded by the manufacturer of the well screen based on the gradation of the material composing the aquifer unless a size is specified in the bid schedule. Submit the gradation of the gravel-pack and the

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13-235-SOL-00005 Page 31 of 74 weight loss by the acid test (required weight loss less than 20%) to the Project Engineer for approval.

H. FORMATION STABILIZER: Well rounded. The grain size will be determined by the Project Engineer based on the physical characteristics of the formation materials.

I. SUBMERSIBLE PUMP

1. Manufacture:

a. Grundfos 16S15-14 or equal

b. Other acceptable manufacturers offering equivalent products

c. Pump selection will depend upon pump test results. Submit pump curves to project engineer prior to selection of pump.

2. Performance:

a. Flow: The well shall be equipped with a submersible pump capable of pumping at the design flow at a depth of 400 ft.

3. Pump shaft:

a. Stainless steel, hex or splines

4. Type:

a. Pump and motor are separate, replaceable units

5. Warranty:

a. Provide a 5 year manufacturers’s repair/replacement pump warranty. Cost of pulling and resinstalling the pump after the expiration of the 1 year warranty is not the responsibility of the contractor.

J. DROP PIPE

1. Type and size:

a. 2” Schedule 80 PVC

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K. SANITARY WELL SEAL

1. Manufacturer: Goulds AWG-6 or equal.

2. Compression type with central drop pipe opening and 3 additional threaded openings: One threaded opening is used for the electrical connection; the second threaded opening is for a screened air vent directed vertically downward and the third threaded opening is for a 1” sounding tube.

L. ENCLOSURE SYSTEM AND PIPING COMPONENTS

1. Enclosure:

a. Manufacturer: Dyer Manufacturing, Dyer, Tenn.

Phone: (731)692-3986. website: www.dyerfiberglass.com

b. Model: Dyer Manufacturing Model D-207.

c. Insulation: Urethane foam one inch.

d. Equip the enclosure with a continuous stainless steel hinge (3 feet

L x 3 ½ inch W).

e. Other acceptable manufacturers offering equivalent products.

2. Base Slab:

a. Concrete 6 feet x 4.5 feet x 4 inches thick.

b. 8 inch wire mesh.

3. Pressure Gauge:

a. 2 inch diameter dial size.

b. Type: Steel case with ¼ inch NPT.

c. Pressure Range: 0 to 100 psi.

4. Pressure Relief Valve:

a. Manufacturer: Goulds AV12-07 or equal.

b. Pressure setting: 75 psi to 80 psi.

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5. Flow Meter:

a. Manufacturer: Clow or equal.

b. Flow: 0-15 gpm.

6. Gate Valve:

a. Bronze, O ring stem seal, 125 psi rated.

7. Check Valve:

a. Manufacturer: Flowmatic

8. Piping:

a. Type: PVC Schedule 80.

b. Size: 2 inch.

3.1 WELL DRILLING

A. Anticipated Description of Work Sequence

1. Drill well to depth of 400 feet or as directed by the Engineer.

2. Obtain formation samples as described in these specifications

3. Perform geophysical logging as described in these specifications

4. Install production casing and screen into bored hole.

5. Install gravel pack as described in these specifications.

6. Install sanitary seal utilizing a tremie pipe per California Well Standards.

7. Test the well for plumbness and alignment as described in these specifications.

8. Develop well as described in these specifications.

9. Test pump well and measure recovery as described in these specifications.

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10. Disinfect well and perform all required water quality analysis testing.

11. Perform all incidental operations related to well drilling such as completing paperwork, cleanup and pitless unit.

12. Install Submersible Pump at depth specificied by the Project Engineer

13. Install a check Valve 20 feet above the pump and immediately above the well casing.

14. Install all well piping and connection to water system.

15. Install power connection to the well and well pump panel

B. Drilling may be accomplished using conventional mud rotary. If necessary, temporary casing with a bentonite seal shall be installed to ensure the stability of the upper formation.

C. The equipment shall be in good repair and be capable of drilling in consolidated and unconsolidated formations.

D. Drilling shall take place at the location staked by the Project Engineer.

E. Drilling shall stop when an adequate aquifer is encountered as determined by the

Contractor and confirmed by the Project Engineer. The determination to stop drilling when no aquifer is encountered shall be made by the Project Engineer.

The Contractor shall not drill deeper that the depth specified in the bid schedule.

F. Take all precautions necessary to prevent undesirable physical or chemical contaminants from entering the borehole. All tools and equipment shall be disinfected before being lowered into the borehole to prevent contamination.

Clean shaft bottom of loose material. Allow inspection of casing prior to placement of grout. Maintain well opening and casing free of contaminants.

G. While drilling the well, use a suitable threaded, flanged, or welded cap or compression seal to prevent surface pollutants from entering the well. Slope the ground immediately surrounding the top of the well casing away from the well to prevent surface runoff from entering the completed well.

3.2 FORMATION SAMPLING METHODS

A. The methods of sampling shall be submitted to the Engineer for approval.

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B. Formation samples must be unwashed and collected every 10 feet and at each change in formation. If so directed by the Engineer, the driller may be required to take samples at 1-foot intervals in a potential aquifer. If required samples are not provided, no payment will be made for drilling.

C. Samples shall be collected, dried, and preserved in separate jars, bags, or other containers of at least one-quart capacity for each interval. Plainly mark containers with well designation, location, depth interval, and the date and time the samples were taken.

D. For wells, which may or will utilize well screens, the Contractor shall obtain additional samples as required in water bearing formations for analysis by a well screen manufacturer. Duplicate samples shall be retained in a safe place until the analysis results are received from the manufacturer. The analysis report shall include the recommended slot size for the well screen to be installed. Submit the results of the analysis with the recommended slot size to the Engineer.

3.3 AQUIFER SAMPLING

A. When directed by the Project Engineer, water samples shall be taken for analysis from each aquifer. Samples shall be obtained in the following manner:

1. A well, in a consolidated formation shall be equipped with an assembly, which includes an inner perforated pipe with the bottom plugged and packers located above and below the target aquifer. The inner pipe shall then be pumped at a rate of at least 10 gallons per minute until a clear sample is obtained for analysis. This step shall be repeated for each aquifer.

2. A well, in a unconsolidated formation shall be equipped with an assembly which consists of a wound screen 2 feet in length set opposite each potential aquifer. Gravel is to be placed around the screen or clear water is to be pumped via reverse normal flow through the screen to cause the formation to collapse on the screen; or a well point shall be driven into the undisturbed aquifer. Water shall then be pumped at a rate of at least 10 gallons per minute until a clear sample is obtained for analysis. This step shall be repeated for each aquifer intended for use.

3. Water samples to be collected by contractor with sample containers provided by the Indian Health Service.

4. Contractor to write date, time, temperature and limits/depths of aquifer from which each respective sample was obtained on the bottle.

5. Samples obtained via air pumping of any type will not be acceptable.

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3.4 BOREHOLE PREPARATION

A. When the hole has been drilled to a depth determined by the Project Engineer and/or geological conditions, it must be prepared for geophysical logging.

Borehole preparation shall include:

1. Continuation of circulation of the drilling mud until drill cuttings have been removed from the borehole, and

2. Circulation of the drilling mud in the borehole until it is uniform and the drill pipe has been removed from the borehole.

B. The Contractor shall make all reasonable efforts to leave the borehole free from obstructions in preparation for geophysical logging.

The geophysical log(s) must be made immediately following the completion of borehole preparation unless otherwise approved by the Project Engineer.

3.5 BOREHOLE LOGGING EQUIPMENT

A. Geophysical and well logging instruments and equipment used must be in good condition to give accurate and representative logs.

B. All logs are recorded at the highest sensitivity that is consistent with a minimum of off-scale deflection.

C. All scales, calibration and standardization and other pertinent data are recorded on each log.

3.6 DRILLER’S LOGS AND REPORTS

A. DAILY DRILLER’S REPORT: A daily detailed Driller’s Report shall be maintained at the job site and delivered upon request by the Indian Health Service. The report shall give a complete description of all formations encountered, number of feet drilled, number of hours on the job, shutdown time due to breakdowns, the water level in the well at the beginning and end of each shift, water level at each change in formation if readily measurable with the drilling method used and feet of casing set. In rotary drilling, the fluid level in the hole should be measured daily prior to starting pumps.

B. DRILLER’S LOGS: The Contractor shall complete a Driller’s Log upon completion of the test hole. The Contractor shall use the State of California Department of Water Resources Water Well Driller’s Report form. The following information shall be recorded at a minimum:

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1. Reference point for all depth measurements.

2. Depth at which each change of formation occurs.

3. Depth at which the first water was encountered.

4. Depth at which each stratum was encountered.

5. Thickness of each stratum.

6. Identification of the material of which each stratum is composed, such as:

a. Clay

b. Sand or Silt

c. Sand or Gravel – Indicate whether the gravel is loose, tight, angular or…