Solicitation_Body.pdf

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SECTION B

BID SCHEDULE - BASE YEAR

The following Bid Schedule is based on estimated quantities required to meet the specifications. The total extended prices shall be used for bid 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 bid prices awarded. Work performed under the contract will be ordered by issuance of delivery orders in accordance with clause 52.216-18 Ordering (See Section I). The designated ordering office is the Contracting Office, Indian Health Service Service/California Area Office, Sacramento, CA.

Construction of Water Wells Fresno, Madera, Mariposa, Tulare and Tuolumne Counties

Base Year Plus Two Option Years

ITEM DESCRIPTION

ESTIMATED

QUANTITY UNIT

UNIT

PRICE

TOTAL

PRICE

101 Mob./Demob. - TP 02670 6 EA

102 Well Drilling for 6-inch Casing - TP 02670 700 FT

103 Steel Well Casing - TP 02670

A. 0.25" wall thickness 180 FT

B. 0.156" wall thickness 180 FT

104 Well Grouting - TP 02670 140 FT

105 PVC Liner - TP 02670 100 FT

106 Well Screen - TP 02670 24 FT

107 PVC Slotted Casing - TP 02670 50 FT

108 Filter Pack - TP 02670 40 FT

109 Well Development - TP 02670 12 HR

110 Formation Stabilizer - TP 02670 100 FT

111 Test Pumping - TP 02670

A. 5 gpm to 20 gpm 10 HR

B. Recovery Measurements 10 HR

112 Well Disinfection/Water Analysis - TP 02670 6 EA

113 Standby Time - TP 02670 10 HR

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114 Well Abandonment - TP 02670 300 FT

115 Pitless Adapter - TP 02670 6 EA

116 Submersible Pump - TP 15450

A. 1 1/2 Hp 3 EA

B. 1 Hp 3 EA

C. 3/4 Hp 3 EA

117 Booster Pump - TP 15450 1 EA

118 1.5 Inch Galv. Drop Pipe/Sub. Cable - TP 15450

A. With #8 Wire 300 FT

B. With #10 Wire 300 FT

119 1 Inch Sch. 80 PVC Drop Pipe/Sub. Cable - TP 15450

A. With #8 Wire 100 FT

B. With #10 Wire 150 FT

C. With #12 Wire 150 FT

120 Pressure Enclosure System - TP 15450 6 LS

121 Water Storage Tank - TP 15450 1 LS

122 Water Service Line - TP 15450

A. 1 inch - PE 500 FT

B. 1 1/2 inch - PE 150 FT

123 Buried Electrical Cable - TP 16100

A. With #8 Wire 600 FT

C. With # 12 Wire 150 FT

D. With #16 Wire 100 FT

124 Mod./Demod Service Truck - TP 02670 3 EA

125 Submersible Pump and Removal - TP 15450 1 EA

126 Booster Pump and Removal - TP 15450 1 EA

127 Pressure Tank and Removal - TP 15450 1 EA

128 Pump Saver and Removal - TP 15450 3 EA

129 Test Pumping - TP 15450 3 HR

130 Imported Pipe Embedment - TP 02200 5 CY

131 Imported Structural Fill - TP 02200 5 CY

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132 Permits and/or Fees

EA **

TOTAL BASE YEAR:

** Do not bid on permits and/or fees. The costs will be reimbursed as indicated on each delivery order at the actual cost of the permits and/or fees.

Option Year Bid Schedule is continued on following pages.

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BID SCHEDULE - OPTION YEAR #1

QUANTITY UNIT

UNIT

PRICE

TOTAL

201 Mob./Demob. - TP 02670 6 EA

202 Well Drilling for 6-inch Casing - TP 02670 700 FT

203 Steel Well Casing - TP 02670

204 Well Grouting - TP 02670 140 FT

205 PVC Liner - TP 02670 100 FT

206 Well Screen - TP 02670 24 FT

207 PVC Slotted Casing - TP 02670 50 FT

208 Filter Pack - TP 02670 40 FT

209 Well Development - TP 02670 12 HR

210 Formation Stabilizer - TP 02670 100 FT

211 Test Pumping - TP 02670

212 Well Disinfection/Water Analysis - TP 02670 6 EA

213 Standby Time - TP 02670 10 HR

214 Well Abandonment - TP 02670 300 FT

215 Pitless Adapter - TP 02670 6 EA

216 Submersible Pump - TP 15450

A. 3/4 Hp 3 EA

C. 1 1/2 Hp 3 EA

217 Booster Pump - TP 15450 1 EA

218 1.5 Inch Galv. Drop Pipe/Sub. Cable - TP 15450

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1 Inch Sch. 80 PVC Drop Pipe/Sub. Cable - TP 15450

220 Pressure Enclosure System - TP 15450 6 LS

221 Water Storage Tank - TP 15450 1 LS

222 Water Service Line - TP 15450

223 Buried Electrical Cable - TP 16100

224 Mod./Demod Service Truck - TP 02670 3 EA

225 Submersible Pump and Removal - TP 15450 1 EA

226 Booster Pump and Removal - TP 15450 1 EA

227 Pressure Tank and Removal - TP 15450 1 EA

228 Pump Saver and Removal - TP 15450 3 EA

229 Test Pumping - TP 15450 3 HR

230 Imported Pipe Embedment - TP 02200 5 CY

231 Imported Structural Fill - TP 02200 5 CY

232 Permits and/or Fees

TOTAL OPTION #1:

** Do not bid on permits and/or fees. The costs will be reimbursed as indicated on each delivery order at the actual cost of the permits and/or fees.

Option Year Bid Schedule is continued on following pages.

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BID SCHEDULE - OPTION YEAR #2

QUANTITY UNIT

UNIT

PRICE

TOTAL

301 Mob./Demob. - TP 02670 6 EA

302 Well Drilling for 6-inch Casing - TP 02670 700 FT

303 Steel Well Casing - TP 02670

304 Well Grouting - TP 02670 140 FT

305 PVC Liner - TP 02670 100 FT

306 Well Screen - TP 02670 24 FT

307 PVC Slotted Casing - TP 02670 50 FT

308 Filter Pack - TP 02670 40 FT

309 Well Development - TP 02670 12 HR

310 Formation Stabilizer - TP 02670 100 FT

311 Test Pumping - TP 02670

312 Well Disinfection/Water Analysis - TP 02670 6 EA

313 Standby Time - TP 02670 10 HR

314 Well Abandonment - TP 02670 300 FT

315 Pitless Adapter - TP 02670 6 EA

316 Submersible Pump - TP 15450

A. 3/4 Hp 3 EA

C. 1 1/2 Hp 3 EA

317 Booster Pump - TP 15450 1 EA

318 1.5 Inch Galv. Drop Pipe/Sub. Cable - TP 15450

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1 Inch Sch. 80 PVC Drop Pipe/Sub. Cable - TP 15450

320 Pressure Enclosure System - TP 15450 6 LS

321 Water Storage Tank - TP 15450 1 LS

322 Water Service Line - TP 15450

323 Buried Electrical Cable - TP 16100

324 Mod./Demod Service Truck - TP 02670 3 EA

325 Submersible Pump and Removal - TP 15450 1 EA

326 Booster Pump and Removal - TP 15450 1 EA

327 Pressure Tank and Removal - TP 15450 1 EA

328 Pump Saver and Removal - TP 15450 3 EA

329 Test Pumping - TP 15450 3 HR

330 Imported Pipe Embedment - TP 02200 5 CY

331 Imported Structural Fill - TP 02200 5 CY

332 Permits and/or Fees

TOTAL OPTION #2:

** Do not bid on permits and/or fees. The costs will be reimbursed as indicated on each delivery order at the actual cost of the permits and/or fees.

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SUMMARY: Base Year

Option Year #1

Option Year #2

TOTAL BID

END OF SECTION B

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SECTION C

SPECIAL PROVISIONS

C.1 SCOPE OF WORK

The work to be done under this contract consists of furnishing all labor, materials, equipment, and supervision necessary to construct individual water wells, individual water systems, also repair existing water well, existing water systems and other required appurtenances in accordance with the attached drawings and specifications.

Work is to be performed at or near Indian residences located in Fresno, Madera, Mariposa, Tulare and Tuolumne Counties, California. It is estimated that 10 water well systems and 10 individual new and existing water well systems will be installed or repaired during each the base and option year.

The individual water wells will consist of a drilled and cased well with sanitary seal. The existing individual water well systems will consist of the removal and replacing item listed in the bid schedule to provide water to an individual dwelling, or constructing of a new individual water system including installation of a water service line to a dwelling.

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 3 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

Normal work days are Monday through Friday with 10 work hours allowed per day.

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, Federal holiday or in excess of 10 hours per day. Written approval from the Contracting Officer must be obtained before the Contractor may work on any such day.

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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 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 all 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

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14-235-SOL-00013 Page 14 of 83 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 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 the line item quantities are estimates, the Contractor will be paid full compensation based upon the actual quantities utilized/completed and verified by the Project 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

02110 Site Clearing 15

02200 Excavating, Trenching, and Backfilling 17

02670 Water Wells 26

15450 Individual Water System 35

16100 Electrical 45

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SECTION 02110

SITE CLEARING

PART 1 – GENERAL

1.1 SECTION INCLUDES

A. This section includes protection of facilities, clearing site of incidental paving and curbs, surface debris, grass, trees, and other plant life in preparation for site or excavation work.

1.2 UNIT PRICE - MEASUREMENT AND PAYMENT

A. There is no separate payment for work under this section. Merge work required with pay items defined within the Measurement and Payment portion of other Sections of this contract.

1.3 RELATED SECTIONS

A. Section 02200 - Excavating, Trenching and Backfilling

PART 2 – PRODUCTS

NONE

PART 3 – EXECUTION

3.1 PROTECTION

A. Locate, identify, and protect existing facilities (remaining), from damage.

B. Identify and protect trees, plant growth, and features designated to remain as final landscaping.

C. Protect bench marks from damage or displacement.

3.2 CLEARING

A. Clear only those areas required for access to site and execution of Work.

B. Remove paving, curbs, and other structures or debris per drawings.

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3.3 REMOVAL

A. Remove paving, brush, trees, and other debris and dispose of off-site.

3.4 TOPSOIL EXCAVATION

A. Excavate topsoil from areas to be further excavated or re-graded.

B. Stockpile topsoil in designated area.

1. Protect from erosion.

2. Remove excess topsoil from site.

END OF SECTION 02110

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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. Imported Pipe Embedment, Imported Structural Fill and Cement Slurry Fill are exceptions.

B. Imported Pipe Embedment: Paid by the cubic yard, measured to the nearest 0.1 yd3. Includes delivery, protection, placement, compaction of imported pipe embedment. Quantity of embedment measured for payment shall not exceed the quantity derived from calculating compacted, in-place volume, as shown on plans, drawings or specifications.

C. Imported Structural Fill: Paid by the cubic yard, measured to the nearest 0.1 yd3.

Includes delivery, protection, placement, compaction of imported structural fill.

Quantity of fill measured for payment shall not exceed the quantity derived from calculating compacted, in-place volume, as shown on plans, drawings or specifications.

D. Cement Slurry Fill: Paid by the cubic yard, measured to the nearest 0.1 yd3.

Includes delivery, protection and placement of concrete slurry fill. Quantity of fill measured for payment shall not exceed the quantity derived from calculating, in-place volume, as shown on plans, drawings or specifications.

A. Section 02110 – Site Clearing

B. Section 15450 – Individual Water System

1.4 REFERENCES

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

Soil-Aggregate Mixtures, Using 5.5 lb (2.5 Kg) Rammer and 12 inch (300 mm) Drop.

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

Method.

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

Soil-Aggregate Mixtures Using 10 lb (4.5 Kg) Rammer and 18 inch (450 mm) Drop.

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

Nuclear Methods (Shallow Depth).

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

Mixtures.

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

G. ASTM D2321 - Recommended Practice for Underground Installation of Flexible

Thermoplastic Sewer Pipe.

H. State of California, Department of Transportation, Latest Edition of the Standard

Specifications.

1.5 REGULATORY REQUIREMENTS

A. Project Engineer to obtain an Encroachment/Trenching Permit from the local roads authority prior to construction. Contractor to 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.

C. Solid Rock: Large continuous masses of igneous, metamorphic, or sedimentary rock, which in the opinion of the Project Engineer cannot be excavated without drilling and blasting. Soil that is capable of being excavated with rippers is not considered solid rock.

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D. Loose Rock: Boulders and other detached stones, with a minimum volume of 1 cubic yard.

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.

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

no. 4 0 to 10

no. 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 Subbase:

3 in 100 2 in 90 to 100

no. 4 50 to 100

no. 200 15 to 40

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2.3 DRAINAGE ROCK

2 in 100 ¾ in 35 to 70

no. 4 0 to 5

2.4 CEMENT SLURRY FILL

A. Slurry cement backfill shall consist of a fluid, workable mixture of aggregate, cement and water that will flow without segregation of the aggregate while being placed.

B. Water used for mixture shall be free from oil, salts and other impurities which would have an adverse effect on the quality of the backfill material.

C. Not less than 188 lbs of cement shall be used for each cubic yard of material produced.

D. The aggregate shall can be commercial quality concrete sand or material meeting the following gradation:

Sieve Size Percent Passing 1 1/2 “ 100 1” 80 to 100 3/4” 60 to 100 3/8” 50 to 100 No. 4 40 to 80 No. 100 10 to 40

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.

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

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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).

B. All material drilled and blasted for removal is classified as rock excavation.

Inform the Project Engineer prior to rock excavation to determine pay measurement.

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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14-235-SOL-00013 Page 22 of 83 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 over night.

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 CEMENT SLURRY BACKFILLING

A. Maintain a minimum of 6 inches clear distance between the outside of pipe and the side of the excavation for pipes 42” in diameter and smaller.

B. Compacted earth plugs or other suitable system shall be placed as the ends of the trench to receive slurry backfill to completely contain the slurry in the trench.

C. Place cement within 1 hour after mixing.

D. Place in a uniform manner that will prevent voids in, or segregation of, the backfill, and will not float or shift the pipe.

E. Backfilling over or placing any material over the slurry cement backfill shall not commence until 4 hours after the slurry has been placed, except that when concrete sand is used for the aggregate and the in-place material is free draining, back filling may commence as soon as the surface water is gone.

F. Cement Slurry Backfill shall not be used where it will be in contact with aluminum and aluminum coated materials.

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3.10 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 Initial Final

Location Bedding Haunching Backfill Backfill

Roadways, Improved Surfaces 95 95 95 95

Roadway Rights-of-Way Outside of Roadway 90 90 90 90 Prism

Unimproved Surfaces, Fields, Etc. 90 90 80 80

Backfill Around Structures 95 95 95 95

3.11 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.

3.12 PROTECTION OF FINISHED WORK

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

3.13 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.

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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 02670

WATER WELLS

A. General and Performance Requirements

B. Drilling and well construction

C. Test pumping

D. Well disinfection and water analysis

A. MOBILIZATION AND DEMOBILIZATION is paid by the unit as specified in the bid schedule, and includes: Site clearing and access, all set-up, take-down, and transportation costs of drilling equipment to and from each well site, test hole or well deepening site. Multiple drilling attempts on the same site will not constitute a new unit.

B. MOBILIZATION AND DEMOBILIZATION FOR SERVICE TRUCK is paid by the unit as specified in the bid schedule, and includes: Site clearing and access, all set-up, take-down, and transportation costs of service truck equipment from each existing well site or water system. Multiple attempts to correct the same problem on the same site shall not constitute a new unit.

C. 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.

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. PVC LINER is paid by the vertical foot of liner depth and includes: PVC casing, connection to PVC slotted casing if required and other incidentals required for complete installation.

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G. WELL SCREEN is paid by the vertical foot of screen length and includes: Screen, sieve analysis, seals, couplings, riser pipe and other incidentals required for installation of the well screen. End fittings, riser pipe or seals are not to be used to determine measurement of vertical meter of screen used.

H. PVC SLOTTED CASING is paid by the vertical foot of slotted casing installed as stated in the bid schedule and includes: Slotted casing, connection to PVC casing and other incidentals required for a complete installation.

I. FILTER PACK is paid by the vertical foot as stated in the bid schedule and includes: Underreaming, filter material, placement of filter material in the annular space between the well screen or the PVC slotted casing and the drilled hole, disinfection and other related work.

J. 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.

K. FORMATION STABILIZER is paid by the vertical foot as stated in the bid schedule and includes: Stabilizer material, placement of material in the annular space between the well screen or the PVC slotted casing and the drilled hole, disinfection and other related work.

L. 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. Recovery measurements will be paid by the hour as shown on the bid schedule. Discharge piping will be paid by the meter as shown on the bid schedule.

M. WELL DISINFECTION AND WATER ANALYSES is paid by the unit and includes: Supplies, labor, equipment, sampling, laboratory fees, and incidentals.

N. STANDBY TIME is paid by the hour as stated in the bid schedule for time contractor is delayed by the Indian Health Service. Standby time will not be paid for contractor caused delays such as maintenance or failure of equipment.

O. WELL ABANDONMENT is paid by the unit foot as stated in the bid schedule and includes all necessary equipment, tools, labor, and other related work necessary for the well abandonment.

P. PITLESS ADAPTER is paid by the unit as stated in the bid schedule and includes all necessary equipment, tools, labor, and related work necessary for the adapter installation.

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A. 02110 - Site Clearing

A. AWWA A100 - Standard for Water Wells.

B. AWWA B301 - Standard for Liquid Chlorine.

C. California Well Standards

1.5 SYSTEM DESCRIPTION

A. Water well with the following characteristics:

1. The well shall be drilled by conventional mud rotary, air rotary, or down-the hole method. Equipment used shall be in good condition and capable of drilling to a depth of 500 feet.

2. Drill cased well at locations staked by the Project Engineer or as shown in the drawings.

3. 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.

4. Casing Diameter Size: 6" and 8" inside diameter. Depth determined by geologic conditions.

5. 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.

1.6 PERFORMANCE REQUIREMENTS

A. Water well capable of producing:

1. Individual home: Minimum 5 gallons of water per minute.

2. Community well: Well yield determine by geologic conditions and the

Project Engineer.

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B. Maximum Sand Suspended in Delivered Water: 5 ppm.

1.7 SUBMITTALS AT PROJECT CLOSEOUT

A. Accurately record locations of well, depth, subsoil strata, and drilling difficulties encountered on IHS well log (form attached).

B. Submit signed copy of driller's logbook statements.

C. Approved and completed county well drilling permit, if applicable.

D. Test pumping data on IHS form (form attached)

1.8 QUALITY ASSURANCE

A. Perform Work in accordance with AWWA A100 AND water well standards:

State of California.

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

2.1 MATERIALS

A. Well Casing: ASTM A53B, 0.25" or 0.156” wall thickness black steel pipe, Type E (electrical resistance) or S (seamless).

B. Drive Shoes: Heat-treated SAE 1040 steel ring or equivalent.

C. Grout:

1. Cement Grout

a. ASTM 150 Portland Cement, Type 1 or Type 3.

b. 4.5 to 6.6 gallons of clean water per bag of cement (95 lbs).

2. Wet Bentonite

a. Baroid's Aquagel or equal. This type of bentonite shall not be applied dry.

D. Well Screen: ANSI Type 304 stainless steel. Continuous slot; outer windings welded to longitudinal bars. The riser pipe shall be stainless steel ASTM Type A312.

E. PVC Slotted Pipe: ASTM F480, Type 1, Schedule 80 pipe; machined slots in a uniform pattern of spacing and rows. Pipe size: 4.8" inside diameter. Required slot

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14-235-SOL-00013 Page 30 of 83 opening: 10 slot. Fittings: Schedule 80 PVC ASTM F480 flush thread fittings including Buna N O-ring on the male end. Johnson Screens (800) 833-9473 or approved equal.

F. PVC Line: ASTM F480, Type1, Schedule 80 pipe. Schedule 80 PVC ASTM F480 flush thread fittings, Buna N O-ring on the male end. Ends squared within .004 inch of the diameter. Johnson Screens (800) 833-9473.

G. Filter Pack: The filter material shall consist of clean, well-rounded grains that are smooth and uniform. The material shall be mostly siliceous with not more than 5 percent calcareous material by weight. The specific gravity of the filter pack material shall be 2.5 or greater.

H. Formation Stabilizer: Well rounded. Grain size distribution should be equal to or slightly larger than the natural formation.

I. Drilling Fluids: Water-based or natural drilling fluids.

J. Chemicals: AWWA B301, Liquid Chlorine.

K. Pitless Unit: Baker-Monitor PS Model 3PS810NBWE22T4 or equal.

3.1 WELL CONSTRUCTION

A. Disinfect all tools and equipment prior to lowering into well to prevent contamination.

B. The method of drilling will be left to the discretion of the Contractor. The equipment used shall be in good repair and be capable of drilling in unconsolidated and consolidated formations.

C. Drill concentric well shaft to diameters and depths as required.

D. Place well casing immediately after drilling. Set firmly in place.

E. Clean shaft bottom of loose material.

F. Allow inspection of casing prior to placement of grout.

G. Place grout to depths as directed by the Project Engineer with a minimum thickness of 2". The method of grouting must be approved by the Project Engineer prior to the commencement of grouting. The method must force the grout under pressure from the bottom of the space to be grouted towards the top surface or the pitless adapter\unit in a single operation.

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H. No drilling, test pumping or other work in the well will be permitted within 72 hours after completion of grouting. If type 3 grout is used this period may be reduced to 48 hours.

I. If bentonite grout is to be used, a 4" thick concrete cap will be installed on top of the bentonite seal for structural strength.

J. Maintain well opening and casing free of contaminating materials.

K. Maintain 10 ppm Cl residual on any drilling fluid.

L. Cut off shaft top 20 inches above grade. Do not permit metal cuttings to enter casing.

M. Size, locate and install well screens according to AWWA A100.

N. Screen sections are joined by welded or threaded connections. If joints are to be welded, the welding rod must be made of material suitable for joining corrosion resistant materials. Where dissimilar metals are joined, a dielectric coupling shall be used.

O. A suitable length of riser pipe should be used on top of the screen.

P. Use one of the following methods for well development: Surge plunger, compressed air, or high velocity water jetting. Pumping is not considered well development.

Q. Perforating casing at the jobsite either above or below ground with torches or cutting tools is not acceptable.

R. Use of liners when unstable formations exist in an open hole shall be approved by the Project Engineer. Terminate the liner 5 feet below the top of the casing unless otherwise approved by the Project Engineer. Slotted PVC pipe will be connected to the PVC liner and be located opposite to the water-bearing formation.

S. The grading of the filter pack material shall be selected by the Contractor based on the formation samples and the drillers's log.

T. Before emplacement, the filter pack material should be treated with a chlorine solution having 50-mg/l free-chlorine residual.

U. The filter pack shall be introduced uniformly and continuously to minimize or eliminate hydraulic segregation and bridging. The filter pack shall be placed by gravity through a tremie pipe. The filter pack shall extend at least 25 percent of the screen length above the top of the screen and riser pipe.

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V. Weld cap on top of casing at completion. Remove cap when installing water system.

3.2 TOLERANCES

A. The maximum variation from plumb not to exceed 2/3 of casing diameter per 100 feet of well depth.

B. The alignment must be satisfactory for the successful installation and operation of the permanent pumping equipment.

3.3 TEST PUMPING

A. Notify Project Engineer 3 days prior to test pumping.

B. Discharge shall be measured with an accurate totalizing meter and stopwatch.

Discharge shall be maintained within plus or minus 5 percent of the designated rate by means of a gate valve or throttling device.

C. Discharged water shall be pumped from the discharged line to the nearest surface-water body, storm sewer or ditch to prevent recirculation of discharged water into the aquifer being tested as approved by the Project Engineer.

D. Run pumping for a minimum of 4 hours for an individual well.

E. It is anticipated that test pumping for community wells will be performed according to the following schedule:

Predominant Aquifer Material Minimum Pumping Time, hours

Silt and Clay Aquifer 170 Fine Sand 30 Medium sand and coarser materials 4

Running the test beyond these times requires Project Engineer approval.

F. Measure and record the drawdown and time of reading the test pump form according to the following schedule:

1. First 10 minutes--drawdown recorded every 1 minute

2. Next 55 minutes--drawdown recorded every 5 minutes.

3. Next 2 hours--draw down recorded every 15 minutes.

4. Final hours--drawdown recorded every 30 minutes.

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G. Immediately upon completion of the test pumping, take recovery measurements and record them on the Aquifer Test Data form (form attached). The recovery readings to be measured according to the following schedule:

1. First 5 minutes--recovery readings every 1-minute.

2. Next 55 minutes--recovery reading every 5 minutes.

3. Final hours--recovery reading every 15 minutes.

H. Recovery readings for an individual home well are for two hours or until the water level recovers to within 1 foot of the static water level, whichever comes first.

I. Recovery readings for a community well shall be measured until the water level recovers to within 1 inch of the static water level or as determined by the Project Engineer.

3.4 WELL DISINFECTION AND WATER QUALITY TESTING

A. Inject and circulate a chlorine solution into well so that the chlorine concentration is at least 50 ppm.

B. Maintain disinfectant in well for 24 hours.

C. DO NOT use undissolved granular HTH for disinfection.

D. Positive bacteriological results require repeated well disinfection and samples retaken until negative results are obtained. Contractor shall notify Project Engineer of positive bacteriological results within 24 hours.

E. Collect water samples during the pump test. The date, time and temperature of each sample are then recorded. The Contractor is responsible for the following chemical tests:

arsenic barium cadmium chromium copper lead mercury nitrate as nitrogen selenium silver fluoride iron manganese chloride sulfates pH alkalinity corrosivity carbonate hardness total hardness coliform bacteria total dissolved solids antimony

F. Collect water samples and submit them to an EPA certified laboratory. Conform to all lab-sampling requirements.

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G. Contractor will furnish sample containers.

3.5 ABANDONMENT

A. Abandon wells when there is insufficient capacity, unsatisfactory water quality, poor alignment, loss of tools, or other unforeseen problems.

B. Adhere to State and local health department rules and regulations for well abandonment.

C. Well abandonment due to contamination, poor alignment, loss of tools, or any other cause attributable to the Contractor, will be conducted at the Contractor's expense.

3.6 CLEANING

A. Restore the well site to its original condition. Remove all underbrush or trees damaged during the drilling operation per Section 02110 (Site Clearing). Remove or bury all drill tailings to restore surface profile to its original condition.

END OF SECTION 02670

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SECTION 15450

INDIVIDUAL WATER SYSTEM

SECTION INCLUDES

A. This Section includes: the construction of a new individual water wells system & water system, water service line, repair of existing water wells and existing water systems. The unit price, measurement and payment follow the bid schedule contain in the contract.

A. Submersible pump

B. Booster pump

C. Drop pipe and sanitary well seal

D. Pressure enclosure system

E. Water storage tank

F. Water service line

G. Yard Hydrant

H. Submersible pump and replacement, w/pump and controls

I. Booster pump and replacement, w/pump and controls

J. Pressure tank replacement

K. Pump saver and replacement

L. Test pumping

1.2 RELATED SECTIONS

A. Section 02200 - Excavating, Trenching and Backfilling.

B. Section 02670 - Individual Water Well.

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C. Section 16100 - Electrical Requirements.

D. Section 03300 – Cast-in-Concrete

1.3 UNIT PRICE - MEASUREMENT AND PAYMENT

A. 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, and all other electrical appurtenances.

B. BOOSTER PUMP: By the unit for the specified booster pump as indicated in the bid schedule and includes: Material & installation of booster pump, pump control box, and all other electrical appurtenances.

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

D. PRESSURE ENCLOSURE SYSTEM: By the unit as stated in the bid schedule and includes: Materials and installation of the enclosure and concrete slab, pressure tank, unions, pressure switch, gate valve, hose bib with vacuum/backflow preventer, check valve, pressure gauge, 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, disinfection, sampling, laboratory fees, and all other fittings and incidentals.

E. WATER STORAGE TANK: By the unit as stated in the bid schedule and includes: Materials and installation of the water storage tank. Price shall include the tank, tank pad excavation, gravel base ring, gravel, conduit (from top of tank to buried electrical connection), electrical junction box, float switch, magnetic contactor, gate valves, check valve, plumbing, foam insulation, and all miscellaneous water service and electrical appurtenances, record drawings, and site cleanup.

F. WATER SERVICE LINE: By the linear foot as stated in the bid schedule and includes: Trench excavation, hand trimming, pipe, fittings, connection to pressure enclosure system, house connection including gate valve, hose bib and adapters, water line warning tape, backfilling, record drawings, and site cleanup.

G. YARD HYDRANT: By the unit as stated in the bid schedule and includes:

Materials and installation of yard hydrant. Price shall include hydrant, concrete pad, pad excavation, gravel, bollards, and all other fittings and incidentals.

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H. SUBMERSIBLE PUMP REPLACEMENT AND REMOVAL: By the unit for the specified submersible pump as indicated in the bid schedule and includes:

Disconnect and removal of existing pump, wire and drop pipe from the site.

Material & installation of submersible pump, pump control box, and all other electrical appurtenances.

I. BOOSTER PUMP REPLACEMENT AND REMOVAL: By the unit for the specified booster pump as indicated in the bid schedule and includes: Disconnect and removal of existing booster pump, drop pipe and pressure switch from the site. Material & installation of booster pump, pump control box, and all other electrical appurtenances.

J. PRESSURE TANK REPLACEMENT AND REMOVAL: By the unit as stated in the bid schedule and includes: Disconnect and removal of existing pressure tank and pipe from site. Materials and installation, pressure tank , unions, pressure switch, gate valve, hose bib with vacuum/backflow preventer, check valve, pressure gauge, plumbing, includes disinfection, sampling, laboratory fees, and all other fittings and incidentals.

K. WATER SERVICE LINE: By the linear foot as stated in the bid schedule and includes: Material, sized per the bid schedule, trench excavation, hand trimming, pipe, fittings, connection as needed to pressure enclosure system and other water system components, house connection including gate valve, hose bib and adapters, water line warning tape, backfilling, record drawings, and site cleanup.

L. PUMP SAVER REPLACEMENT AND REMOVAL: By the unit at stated in the bid schedule and includes: Disconnect and removal of existing pump saver box from the site. Materials and installation of pump save box wires connection to existing breaker box or subpanel and water well pump.

M. TEST PUMPING: By is paid by the hour and includes: All necessary equipment, tools, labor, measuring instrument and pumping equipment capable of pumping the discharge rate shown on the bid schedule. The pumping unit shall be complete with ample power source, controls and appurtenances. Recovery measurements will be paid by the hour as shown on the bid schedule. The test pump shall be removed at the completion of the test pumping and replaced with a new submersible pump. The new submersible pump size shall be determined by the Project Engineer

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1.4 OPERATION AND MAINTENANCE DATA

A. Include typed report in a 3-ring binder with divider tabs containing:

Operation and Maintenance Requirements Trouble Shooting Checklist Inspection Data Replacement Part Numbers Supplier's Name/Telephone Number/Address Warranty Documentation and Registration Well Log Data and Forms

1.5 QUALITY ASSURANCE

A. Perform Work in accordance with the National Electrical Code.

2.1 SUBMERSIBLE PUMP

A. Manufacturer:

1. Grundfos: Model 5S, 7S or 10S

2. Other acceptable manufacturers offering equivalent products.

B. Performance:

1. Flow: At least 10 L per minute dependent on condition of well.

2. Motor: ¾ hp, 1 hp, and 1.5 hp, 230 volts, single phase three wire, 60 Hz.

C. Pump Shaft: Stainless steel, hex or splines.

D. Casing: Stainless steel.

E. Type: Pump and motor are separate, replaceable units.

F. Warranty: Provide a 5 year manufacturer's repair/replacement pump warranty.

Cost of pulling and reinstalling the pump after the expiration of the 1 year warranty is not the responsibility of the Contractor.

2.2 BOOSTER PUMP

1. Grundfos: Model JP-7

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2. Other acceptable manufacturers offering equivalent products.

B. Performance:

1. Flow: At least 10 L per minute @ 50 psi.

2. Motor: ¾ hp, 230 volts, single-phase three wire, 60 Hz.

C. Impeller: Stainless steel

E. Type: Pump and motor are separate, replaceable units.

2.3 DROP PIPE

A. Type:

1. Schedule 40, galvanized steel, ASTM A 120. Couplings: Schedule 40, galvanized steel.

2. TBE (threaded both ends) PVC Schedule, ASTM D 1785. Couplings:

PVC Schedule 80.

B. Joints: Teflon tape or teflon compound (galvanized only) on all threaded connections.

C. Size: 1 inch and 1.5 inch

2.4 WATER SERVICE PIPE

A.…