Att 1 CNF Well Improv Specifications_Rev.docx

SPECIFICATION LIST FOR

CLEVELAND NATIONAL FOREST

WATER WELL IMPROVEMENTS

DIVISION 1 - GENERAL REQUIREMENTS

SECTION 01010 - SUMMARY OF WORK

SECTION 01505 - MOBILIZATION

SECTION 01600 – USE OF GOVERNMENT FACILITIES….……...1

SECTION 01711 - CLEANUP AND DISPOSAL

DIVISION 2 - SITE WORK

SECTION 02220 – EXCAVATION AND BACKFILL ………………4

SECTION 02640 – VALVES, ENCLOSURES & WELL

PLUMBING……..………………………………..………………….4

SECTI0N 02670 - VERTICAL WATER WELL DRILLING…

SECTION 02675 – DISINFECTION OF WATER SYSTEM…………2

DIVISION 3 – CONCRETE

SECTION 03300 – CAST IN PLACE CONCRETE………..………...13

DIVISION 13 – SPECIAL CONSTRUCTION

SECTION 13200 – WELLHEAD/PUMP HOUSE ……………………4

DIVISION 3 – 12 , 14,15 NOT USED

DIVISION 16 – ELECTRICAL

END OF INDEX

SECTION 01010

SUMMARY OF WORK

PART 1 - GENERAL

1.01 SCOPE: This contract shall provide the Forest Service with a new vertical water well at the Mt. Laguna Recreation Area – Los Rasalies Ravine, located on the Cleveland National Forest. Base bid work includes drilling a new vertical water well, well development and yield and drawdown testing. Upon successful drilling and development of a successful well, optional work includes installation of a submersible pump, electrical pump control panel, pump saver, wellhead plumbing and concrete slab, wellhead/pump house, and valve /splice boxes for pump line, electrical power line and pump control line. Base bid work also includes the destruction of existing wells that are currently abandoned and not beneficial to the Forest for future use.

The Contractor is responsible for obtaining the Well Construction permit with the San Diego County Department of Environmental Health.

B. Upon completion of successful well drilling, development, yield test and sanitary seal, and approval by the Contracting Officer, the Contractor shall perform the following OPTIONAL work: install a new submersible well pump in accordance with Section 02670, Vertical Water Well Drilling and as approved by the Contracting Officer.

New wellhead plumbing shall be installed AS SHOWN ON DRAWINGS. Waterline shall be installed from the wellhead to a new valve box adjacent to the well slab. Within the valve box will be a shut off valve and a capped stub for future waterline distribution AS SHOWN ON THE DRAWINGS.

A new electrical conduit shall be installed from the pump control panel to a new valve/splice box and shall be capped AS SHOWN ON THE DRAWINGS. All electrical panel work and connections shall be performed by a state licensed electrician.

Construct a new pumphouse over the existing well in accordance with Specification Section 13200 and AS SHOWN ON THE DRAWINGS.

C. The existing abandoned wells located in Mt. Laguna, California (Cuyapaipe well) and Silverado Canyon (Silverado Fire Station well) and Descanso (Descanso Fire Station) will be destroyed in accordance with Contract Specification Section 02670 and California Well Standards, Bulletin 74, Part III.

The Cuyapaipe well is a 394 foot deep well that was drilled in 1964. Present depth measures at 385 feet and the static water level is around 100 feet deep. It has a well casing that is 6 inch diameter and measures approximately 20 feet deep. There is a CMU structure enclosing this well. Work includes demolition of this structure and the remnants of the electrical panel on the nearby pole including demolition of the pole, removal of these components from Forest Service land and proper disposal.

The Silverado Fire Station well is a 400 foot deep well that was drilled in 1960 and abandoned due to water quality problems. This well is located on an active Forest Service and Orange County Fire Authority fire station compound. The existing compound receives water from the local municipal water district. The abandoned well is cased down to 224 feet. At the surface there is an 8 inch diameter casing that has a concrete slab poured around it.

The Descanso Fire Station well is located within the engine bay of the existing garage at the station site. The well is presently capped with a concrete patch and is presumed to be a hand dug well six feet in diameter and 25 feet deep. A similar hand dug well was found and destroyed on the same site in 2008. Optional work will require equipment to be used outside of the existing engine garage since it is still an active structure and facility.

1.03 SITE ACCESS: Los Rasalies Well - From San Diego, California, travel east on Interstate 8 for approximately 60 miles to Sunrise Highway (S1). Thence turn left on sunrise Highway and travel northeast 5 miles to the second gated dirt road named Old County Road. Thence turn left and travel through gate on Old County Road and travel Northeast for approximately 0.4 miles to the project site on the right side of the road. See staking and flagging for drill site.

WELL DESTRUCTIONS – Cuyapaipe Well: From Old County Road, continue on Sunrise Highway for another 3 mile to Thing Valley Road. Turn right and travel east for approximately 0.2 mile, veering to the right on Thing Valley Road, then turn left and travel for 0.1 mile down road to drilled well site on right hand side. Silverado Fire Station: From San Diego, California, Travel north on Interstate 5 for approximately 60 miles to Tustin Ranch Road. Then turn right and travel 0.4 mile to Walnut Avenue. Then Turn left and merge onto CA 261 north via ramp on left and travel for 5.6 miles. There are portions of this road that are subject to tolls. Take the Santiago Canyon road exit (CA 261 South) toward Chapman. Then turn right on Santiago Canyon Road and travel east for approximately 5.3 miles and then turn left on Silverado Canyon Road and travel east for approximately 1.8 miles to the Silverado Fire Station on the right side of the road. Site address is 27172 Silverado Canyon Road, Silverado 92676. Site phone is (714) 649-2645. The drilled well is located near the sheds on the southeast portion of the compound. Descanso Station: From San Diego, California, travel Interstate 8 East to the Japatul Valley Road exit. Then turn left and travel North for ~ 1 mile to Riverside Drive, turn left and go ~ 1 mile. Then turn left on Viejas Grade for ~ 0.5 miles to the Descanso Fire Station, on the left side of the road. Site address: 24321 Viejas Grade, Descanso, California 92016. Site phone: (619) 445-4650.

1.04 DAYS/HOURS OF OPERATION: The Contractor's construction activities shall be restricted to Monday through Friday, 6:00 am to 6:00 pm.

1.05 CONTRACTOR'S SCHEDULE: The Contractor shall provide the Government with a complete work schedule describing the different work activities and when they will be initiated and completed. The Contractor will be expected to follow this schedule during the course of the contract or shall submit a revised schedule within 48 hours of unforeseen delays or changes. There will be no work on Federal holidays, including Fourth of July and Labor Day.

1.06 CONSTRUCTION STAKING: The Forest Service will stake the location of the new wellhead.

1.07 MEASUREMENT AND PAYMENT

A. Measurement: The work shall be measured for each item as listed below and as shown on the Schedule of Items.

1. Lump Sum Quantity (LSQ) shall be measured as the entire job and shall include all items to complete that particular item in it's entirety.

2. Actual Quantity (AQ) shall be measured as the actual work installed, completed and accepted.

B. Payment: Payment for the quantity or unit, as measured above, will be at the contract unit price as shown on the Schedule of Items. Payment will constitute full compensation for all labor, equipment, materials and incidentals necessary to complete the work described herein and AS SHOWN ON THE DRAWINGS.

1.08 COUNTY WELL CONSTRUCTION AND DESTRUCTION PERMIT: The well driller shall hold a valid C-57 drillers license issued by the State of California for vertical well drilling. Well driller shall secure and provide payment to the San Diego County Environmental Health Department for a well construction permit in the name of the United Stated Forest Service. The well destruction permits will be obtained in the same manner, with payment and application to the County of San Diego EHD for Cuyapaipe well and to the County of Orange EHD for the Silverado well.

1.09 SUBMITTALS: Per specification for vertical water well drilling, Contractor shall perform a yield and the test as described in Specification Section 02670, Vertical Water Well Drilling. Contractor shall submit both a legible well log and a yield and drawdown chart to Contracting Officer's Representative as soon as practicable. Further, copies of the approved well permits preceding the well construction and destruction activities must be submitted to the Contracting Officer.

PART 2 - PRODUCTS (Not Applicable)

PART 3 - EXECUTION

3.01 REQUIREMENTS OF REGULATORY AGENCIES All work performed shall comply with health and safety, fire codes, OSHA regulations, American Water Works Association (AWWA), California Well Standards, and/or applicable regulations established by local, county and state codes.

END OF SECTION

SECTION 01505

MOBILIZATION

1.01 SCOPE

A. This work consists of preparatory work and operations necessary for the movement of personnel, equipment, supplies, and incidentals to the project site, and for all other work and operations that must be performed or that cause costs to be incurred prior to beginning work on the various items on the project site.

1.02 MEASUREMENT AND PAYMENT

A. The accepted quantities will be paid for at the contract unit price for item 01505 Mobilization.

B. Progress payments will be made as follows:

1. The Government will pay to the Contractor in the first progress payment the total premium paid by the Contractor to obtain bonds. This payment shall not be in addition to the contract price and will be included in Item 01505, Mobilizaton.

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

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

4. Upon completion of all work on the project, any upaid amount for item 01505, Mobilization, will be paid.

C. The total of all payments will not exceed the original contract amount for item 01505, Mobilization.

PART 2 - PRODUCTS

Not Applicable

Not Applicable

SECTION 01600

USE OF GOVERNMENT FACILITIES

1.01 SCOPE

A. This work consists of the use, by the Contractor, of areas and facilities owned by the Government during the construction of this project.

PART 2 - PRODUCTS

Not Applicable.

PART 3 - EXECUTION

3.01 The Government will not have any facilities available to the Contractor .

3.02 The Contractor can create a storage area in the immediate area as approved by the Contracting Officer. The Contractor's may store equipment and materials in this area. The Contractor shall be responsible for providing for the security of the equipment and materials delivered to the jobsite. The contractor will need to provide their own water and electrical power.

3.03 The Contractor shall return the area designated for equipment and materials storage to the original state at the completion of the project.

3.04 The Contractor's hours of operation shall be limited to Monday through Friday, 6:00 am to 6:00 pm. Shut down periods as noted in Section 01010, Summary of Work, paragraph 1.05 shall apply.

SECTION 01711

CLEANUP AND DISPOSAL

1.01 SCOPE

A. The work in this section consists of the cleanup required in areas affected by the construction and the disposal of refuse and excess material resulting from construction operations. Such work includes but is not limited to the following items:

1.02 MEASUREMENT AND PAYMENT

A. No separate measurement or payment will be made for work specified in this section.

Not applicable.

3.01 Excess materials, and refuse materials generated by the Contractor's construction operations including all construction debris, unsuitable excavation, and the like shall be removed from the project site as it accumulates and disposed of off National Forest Lands to an appropriate landfill. The Contractor shall keep all areas adjacent to, and leading to the site, clean and free of debris at all times. All roads shall be kept clear and accessible to thru traffic.

3.02 Salvageable items not intended for use in this contract and not specifically designated to remain the property of the Government shall become the property of the Contractor. Items not salvageable shall be disposed of according to article 3.01 above.

3.03 Burning is not permitted on Government Property. No welding operations shall proceed until an approved welding permit has been issued by qualified Forest Service fire personnel.

SECTION 02220

CNF Water Well Improvements

EXCAVATION AND BACKFILL

1.01 SCOPE: This work consists of excavating and backfilling for the installation of the well head, valve box, pull box, well destruction work and concrete surface slabs and includes all necessary compaction.

1.02 MEASUREMENT AND PAYMENT: No separate measurement and payment will be made for work specified in this section. Work shall be considered incidental to other work.

2.01 BACKFILL

A. GENERAL: All fill material shall be approved by the Contracting Officer. Excavated materials from the site may be used if approved. Imported fill shall be nonexpansive and predominantly granular soil or soil rock mixture which is free from organic matter and deleterious substances and which does not contain materials over two inches in greatest dimension. Material having a dimension greater than 1-1/2 inches shall not be used in the upper six inches of fill.

B. CRUSHED ROCK: Material for use below slabs as drain course shall consist of approved sound, hard, durable, well-graded sands and gravels meeting the following gradation requirements, or approved equal:

U.S. Standard Sieve Size Percent Passing

1-1/2 inch 90-100%

No. 4 60-100%

No. 30 5-60%

No. 200 0-10%

C. SELECT BACKFILL shall consist of hard, durable granular soil or a soil-rock mixture. It shall be non-expansive, free of organic matter and deleterious substances. It shall contain no lumps or particles larger than 1/2 inch and only 30 percent of material shall exceed 1/4 inch. Material shall be obtained by screening of excavated or borrow material, or from an approved source.

D. NON-SELECT BACKFILL shall be of the same quality as select backfill, except it shall contain no particles or lumps in excess of 2 inches.

E. NATIVE BACKFILL, where designated, shall be excavated native material replaced as is. The top 6 inches of trench backfill shall contain no rocks greater than 3 inches in largest dimension.

2.02 DRAIN ROCK / VALVE BOX GRAVEL shall be washed, evenly graded mixture of crushed stone, or crushed or uncrushed gravel, with 100 percent passing a 1-1/2 inch sieve and not more than 5 percent passing a No. 4 sieve.

2.03 WATER:

Water for compaction shall be clean, and free of all organic, deleterious substances and contaminants.

2.04 WELL DESTRUCTION SEALING MATERIAL shall be as specified in the California Well Standards Bulletin 74 and as required by the local County and Environmental Health Department.

3.01 EXCAVATION - GENERAL

A. General excavation shall be made to dimensions and elevations indicated or implied on the drawings. Excavation for concrete sections to be formed shall be sufficient in width to allow for convenient construction and removal of forms.

B. Excavation material not suitable for backfill, including boulders, logs, or any other objectionable material encountered shall be removed and disposed of at an area approved by the Contracting Officer.

C. All material to be excavated shall be unclassified and shall include earth fills, gravels, boulders, debris and any other materials encountered in excavation. The contractor shall remove all materials to the depth and extent indicated on the drawings or specified herein.

D. Excess excavated material may be utilized as designated by the Contracting Officer in erosion channels.

3.02 EXCAVATION FOR TRENCHES

A. Excavation shall be performed AS SHOWN ON THE DRAWINGS and shall conform to dimensions, elevations and depths shown within a tolerance of plus or minus 0.15 foot. Material suitable for backfilling shall be piled in an orderly manner along the trench line or stockpiled in designated locations approved by the Contracting Officer.

B. All roots 2-inches or less in diameter, and any stump roots, shall be cut off at trench walls. Any roots, over 2-inches in diameter, that interfere with the laying and which cannot be bypassed, shall only be removed with the Contracting Officer's approval. Where cutting is approved, the tree side of the cut root shall be treated with an approved commercial product specifically manufactured for that purpose.

3.03 BACKFILL PLACEMENT

A. Excavations shall not be backfilled until all subgrade and utility installations have been approved by the Contracting Officer. Contractor shall backfill as work is completed and accepted.

B. SELECT MATERIAL/CRUSHED ROCK shall be used for backfill around the well head and inside valve boxes AS SHOWN ON THE DRAWING. All select backfill shall be placed in 12 inch maximum lifts and compacted by mechanical tampers.

C. NON-SELECT MATERIAL shall be placed in 12 inch maximum lifts. Backfill material within 6 inches of the surface shall be free of rock greater than 3 inches.

D. Place backfill and fill materials in layers not more than 8 inches in loose depth for material compacted by heavy compaction equipment, and not more than 4 inches in loose depth for material compacted by hand-operated tampers. Wheel rolling material in trenches is not an acceptable method to achieve compaction.

E. Before compaction, moisten or aerate each layer as necessary to provide optimum moisture content.

3.04 COMPACTION

A. FOR WATER UTILITY TRENCHES, VALVE BOXES AND WELL HEAD FOUNDATIONS: The Contractor shall perform the following density tests of compacted material in accordance with AASHTO T-238, and moisture tests of compacted material in accordance with AASHTO T-239, or other approved field density and moisture tests. The Contractor shall submit certified results of such tests to the Contracting Officer for review and approval prior to backfilling against any major structures or utilities. The desired compaction level is 95% under foundations and 90% in all other locations. If the Contracting Officer determines, by such tests, that the specified density has not been attained, the Contractor shall perform additional work as may be necessary to attain the specified compaction at no additional cost.

If field tests are performed using nuclear methods, make calibration checks of both density and moisture gages at beginning of work, on each different type of material encountered, and at intervals as directed by the Contracting Officer.

D. Do not place backfill or fill material on surfaces that are muddy, frozen, or contain frost or ice.

3.05 DEWATERING

A. The contractor shall maintain all excavated and general site area free of water at all times. Grading, drainage ditches, dikes and any other necessary work shall be undertaken to divert rainfall or other surface water from the excavation. The Contractor shall prevent and remove, if necessary all subsurface or ground water from flowing into excavations and from flooding project site and surrounding area.

B. Concrete curing water or water from other construction operations shall not be allowed to accumulate in the excavation during foundation construction.

3.06 STORAGE OF EXCAVATED MATERIALS

A. Stockpile excavated materials acceptable for backfill and fill where directed. Place, grade, and shape stockpiles for proper drainage.

1. Locate and retain soil materials away from edge of excavations.

2. Dispose of excess excavated soil material and materials not acceptable for use as backfill or fill.

B. No excavated material shall be deposited at any time so as to endanger the partly finished structure either by direct pressure, indirectly overloading bank contiguous to the operation, or by any other manner.

3.07 COLD WEATHER PROTECTION: Protect the bottom of excavation from freezing when atmospheric temperature is less than 35 degrees F.

3.08 CLEANUP: The disturbed area along the utility trench, around excavations and above demolition sites shall be finished to grade and left in a condition to present a natural appearance. All debris and materials not utilized shall be disposed of as specified in SECTION 01711 Cleanup and Disposal.

SECTION 02640

VALVES AND ENCLOSURES &

WELLHEAD PLUMBING

PART 1 GENERAL

1.01 SCOPE: This work consists of furnishing and installing water valves, plumbing and valve boxes as SHOWN ON THE DRAWINGS and specified herein.

1.02 CODES AND STANDARDS:

A. Work performed under this Section shall meet the requirements of the following:

4. Underwriters Laboratory (UL)

5. American Concrete Institute

6. National Sanitation Foundation (NSF)

1.03 SUBMITTALS:

A. Contractor shall furnish submittals to the Government for review and approval at least 15 days prior to intended installation.

B. Product Data

1. Submit manufacturer’s technical product data and instructions for those products AS SHOWN ON THE DRAWINGS.

2. Product literature shall be sufficient to determine compliance with the Drawings and Specifications.

1.04 MEASUREMENT AND PAYMENT

DIVISION 02 02640-13

DIVISION 2 Section 02670-

Measurement and payment for all wellhead improvements and valves and enclosures, including all plumbing and electrical work within the wellhead/pump house AS SHOWN ON DRAWINGS and described herein and will be measured as a lump sum basis and will include all labor, materials and equipment necessary. Contract work will be made under the pay items as listed in the Schedule of Items.

B. PAYMENT

DIVISION 2 Section 02670-14

The item as described above will be paid for at the contract unit price as shown on the Schedule of Items. Such payments shall be considered full compensation for completion of the work and providing a fully operational and automated vertical water supply well.

PART 2 PRODUCTS

2.01 VALVES: Valves and valve boxes shall be new, of size, material and type shown on the drawings or specified herein. All valves shall be equipped with hand wheel or other operating devices. Extensions shall be supplied for valves whose standard handle would exceed 12 inches below the top of valve enclosure. All valves shall be NSF approved for potable water use.

A. Bronze Gate Valves, Class 125 - 1/2 inch through 2 1/2 inch. Valves shall be bronze, screw-in bonnet with solid wedge disk, non-rising stem, with wheeled handle, 200-psi non-shock cold water, oil, or gas.

B. Ball Valves, full port, bronze body with chrome plated brass ball, reinforced TFE seats and PTFE stem packing and stem thrust bearing with blowout proof brass stem. Valve shall be Class 150 and shall be Watts B6080 or approved equal.

C. Iron Gate Valves, below grade, Class 125 ductile iron- 3 inch and larger. Valves shall be non-rising stem, bolted bonnet, bronze mounted, solid wedge disk, 200-psi non-shock cold water, oil, or gas. Valves shall have mechanical joint or flanged ends and hand wheel unless otherwise SHOWN ON THE DRAWINGS.

D. Globe valves shall be bronze, Class 125 WSP, 200 WOG. Valve shall have threaded bonnet, non-rising stem and swivel type disc. Valve shall be a Watts Series GLV or approved equal.

2.02 PRESSURE RELIEF VALVE: Water pressure reducing valve shall be bronzed body construction with thermal expansion bypass, stainless steel springs. Adjustable range of 50-175 psi. PRV shall be a Watts 530c or approved equal. Well pressure relief valve shall be set at 25 psi plus system design pressure.

2.03 HOSE BIBBS: Hose bibbs shall be of rough brass, service line pattern, no hose kink design, I.P. male, and with tee-handle. Hose bib located at wellhead site shall be a non-threaded sampling tap. They shall be the size as shown on the drawings.

2.04 PRESSURE GUAGE: Pressure gauge shall be a liquid filled, 2-1/2” face stainless steel gauge with a range up to 160 psi. Gauge shall be an Ashcroft 251008 or approved equal.

2.05 CHECK VALVE: Check valve shall be a bronze body cap and disc, tee pattern, class 125 WSP, 200 psi WOG, meet ASTM B584 non-shock valve with IPS threaded connection. Valve shall be a Watts CV Series or approved equal.

2.06 WATER METERS AND SETTERS: 2” water meter shall be a positive displacement type meter with standard read out and screwed end connections. Meter shall be a Sensus DN 50. The meter setter shall be a Ford Series 70 Coppersetter with angle ball valve.

2.07 NON-TRAFFIC RATED (NTR) VALVE BOXES shall be Christy Fiberlyte FL 36 Box X 18 with 2 – 8 inch extensions and pentahead bolts as manufactured by Christy Concrete Products, Inc. 1-800-486-6804.

2.08 GRAVEL shall meet the following requirements: Use washed, evenly graded mixture of crushed stone, or crushed or uncrushed gravel, with 100 percent passing a 1-1/2 inch sieve and not more than 5 percent passing a No. 4 sieve.

2.09 WATER PUMPLINE STUB OUT – 3” SCH 40 PVC shall be connected to well head plumbing and extend down through the wellhead/pump house slab and into a valve box just outside the wellhead/pump house. The 3” pump line shall be capped. The concrete slab penetration shall be sleeved.

PART 3 EXECUTION

3.01 GENERAL: Valves, valve boxes, fire hydrants, and all other valves shall be new, of size, material and type SHOWN ON THE DRAWINGS or specified herein.

3.02 VALVES:

A. Valves shall be installed as SHOWN ON THE DRAWINGS. Valves shall be installed in such positions that they are readily accessible and can be easily and fully opened and closed without binding. All valves shall be installed with stems pointing up. Where possible all valves shall be installed in the center of the valve box. Where extension handles are required to operate valves, contractor shall provide the Government with two handles.

B. All PVC and ductile iron fittings and valves shall be joined together using a Mechanical Joint (MJ).

C. Reduced Pressure (RP) devices shall be installed as shown on the drawings. RP devices shall be installed level and plumb with the relief port directed downward.

3.03 VALVE BOX ENCLOSURE:

A. The box shall be set over the pipes, centered on the capped end. elated assemblies. Box shall be installed so as not to be in contact with the pipe or apparatus they serve so as not to create any undo stress or strain on the piping system. The area in which the box sets shall be compacted as required for the sub-base for structures. The box, when in final position, shall be 1-inch minimum above surrounding finish grade and there shall be a minimum of 1/2-inch minimum clearance between the box and the pipeline at any point. The box shall have ¼” x ¼” hardware cloth placed on the bottom of the box AS SHOWN ON THE DRAWINGS.

B. All boxes shall be provided with a lid marked “WATER”. For areas in traffic (TR) areas, the lid shall be rated for H20 loading. Lid in non-traffic (NTR) areas shall be concrete manufactured for the box it serves.

C. After the box is in final position, the area around the box shall be backfilled and compacted the same as for structures.

3.04 COMPACTION: Valve box assembly shall be backfilled and compacted to a level of 90% ASTM T180, Method C. There shall be no settling of the valve box or risers upon installation completion. There shall be no backfill material inside the box near the valve assembly. All riser cut outs shall be sealed to allow for uniform compaction around the entire box to grade and to prevent backfill material intrusion.

3.05 Grading and Cleanup - Upon completion of backfill, the area around the boxes shall be finish graded to the contour of the original ground or to the lines shown on the drawings. The general area disturbed by the installation operation, shall be raked smooth. All extra debris and material not utilized shall be removed from the area.

SECTION 02670

VERTICAL WATER WELL

DRILLING

1.02 ABBREVIATIONS AND DEFINITIONS::

AQ.........Actual Quantity

DIVISION 2 Section 02670- HR.........Hour L.F..... ...Linear Foot

LSQ.......Lump Sum Quantity

DIVISION 2 Section 02670-18 PVC.......Polyvinylchloride

B. Definitions:

DIVISION 2 Section 02670-

Actual Quantity - These quantities are determined from measurements of completed work.

DIVISION 2 Section 02670-

Lump Sum Quantity - The quantities denote one complete unit of work as required or described in the contract, including necessary materials, equipment, and labor to complete the job. They will not be measured.

DIVISION 2 Section 02670-

C. Location of Work - The exact location of the well will be staked on the ground by the Government. The Government will assume all responsibility for locating the well site. It is understood that the drilling contractor does not represent, warrant, or guarantee the quality, quantity, or kind of water, if any, which may be encountered.

DIVISION 2 Section 02670-18

experienced support personnel and cable tool or rotary (air or mud, standard or reverse circulation) drilling equipment. All work under this contract shall be performed in a skillful and workmanlike manner.

DIVISION 2 Section 02670-18

E. Licenses and permits - The contractor shall be responsible for obtaining applicable permits. The Contractor shall have a valid California C57 license and shall supply all required information to the State and County subsequent to completion of the work.

DIVISION 2 Section 02670-18

H. Timing of Drilling - Drilling and drilling related activities at the site will be limited to between the hours of 6 am and 6 pm of each day during the life of the contract.

DIVISION 2 Section 02670-18

DIVISION 2 Section 02670-

DIVISION 2 Section 02670-19

DIVISION 2 Section 02670-

DIVISION 2 Section 02670-

DIVISION 2 Section 02670-

DIVISION 2 Section 02670-

DIVISION 2 Section 02670-

DIVISION 2 Section 02670-19

DIVISION 2 Section 02670-19

1.04 MEASUREMENT AND PAYMENT

DIVISION 2 Section 02670-19

A. MEASUREMENT

Measurement and payment for contract work will be made under those pay items as listed in the Schedule of Items.

DIVISION 2 Section 02670-20

4. The quantity of perforated water well casing to be measured will be the actual number of linear feet of perforated casing furnished, accepted and installed in the well. The perforated casing shall have a minimum 6 inch ID.

5. The quantity for well development will be measured as a lump sum quantity and will be determined to be complete by the Contracting Officer.

6. The pump draw down and yield test will be measured as a lump sum quantity and will be performed as an 8 to 24 hour test as directed by the C.O.

7. The annular seal grout to be measured will be the actual linear feet of approved approved annular seal grout furnished and installed in the well. ( In no case shall the depth be less then 50 linear feet).

8. The destroyed wells will be measured as a lump sum quantity for each abandoned well and will include the destruction of all above ground appurtenances including pump panel, pump, valves, piping, surface concrete, top portion of well casings and well enclosures.

9. Should the well fail to conform to these specifications through faulty workmanship or procedural failure by the Contractor and the Contractor is unable to correct the condition or negotiate a mutually acceptable cost reduction with the Contracting Officer for specification deviations, the well shall be considered an abandoned well through the fault of the Contractor and no payment will be made for any portion of the work. The Contractor shall be responsible for abandonment of the well at no cost to the Government.

10. Should the Contracting Officer determine that the failure of the well to conform to these specifications is through no fault or responsibility of the Contractor or the Contractor's equipment, the work will be paid for at the unit prices in the Schedule of Items for the work performed. Additional well(s) drilled, at the direction of the Contracting Officer, in the same general location of the well previously drilled and abandon under this contract, shall be considered new wells and will be negotiated for at the contract rates. The Government shall be responsible for abandoning wells abandoned through no fault of the Contractor.

[Type text]

B. PAYMENT

DIVISION 2 Section 02670-4

The quantities as measured above will be paid for at the contract unit price as shown on the Schedule of Items. Such payments shall be considered full compensation for completion of the work and providing a fully operational and sanitary vertical water well.

DIVISION 2 Section 02670-21

DIVISION 2 Section 02670-4

DIVISION 2 Section 02670-4

DIVISION 2 Section 02670-

1. ANNULAR SEAL CASING: The annular seal casing shall be a new, single wall, steel water well casing with a minimum thickness of a quarter (1/4) inch and fabricated from high-tensile strength, corrosion-resistant steel with the minimum material properties set forth in ASTM A53.

DIVISION 2 Section 02670-4

2. PRODUCTION CASING: The production well casing shall be a new, undamaged, polyvinyl chloride (PVC) water well casing. PVC casing shall be pressure class 200 and meet ASTM F480 "Standard Specifications for Thermoplastic Water Well Casing Pipe and Couplings Made in Standard Dimension Ratios" including the later revisions thereof.

CNF Water Well Improvments

3. PERFORATED CASING: Perforated well casing shall be of the same material as the solid well casing or may be an approved manufactured perforated casing or well screen. The Contracting Officer shall specify where perforated water well casing shall be installed. The casing shall be perforated to give the maximum yield and to minimize the intrusion of sediment into the well. The casing must be perforated before it is installed. The Contractor may machine cut the casing. The slot width will be determined by Contractor and approved by Contracting Officer.

DIVISION 2 Section 02670-5

DIVISION 2 Section 02670-

DIVISION 2 Section 02670-5

DIVISION 2 Section 02670-5

DIVISION 2 Section 02670-

DIVISION 2 Section 02670-

2.05 DISINFECTANT

DIVISION 2 Section 02670-22

A. The test pump shall be like new and will have a capacity of 50 gpm with maximum pumping level of 500 feet below the ground and shall be equipped for variable discharge so that various drawdown rates including the rate of 3 gpm can be determined.

DIVISION 2 Section 02670-22

DIVISION 2 Section 02670-

DIVISION 2 Section 02670-22

DIVISION 2 Section 02670-6

DIVISION 2 Section 02670-6

B. The Contractor will contain all drilling fluids and cuttings in an excavated drilling sump or portable sumps supplied by the Contractor, when drilling muds or other drilling additives are used. The Contractor must indicate before drilling begins whether or not drilling additives are likely to be used. No additives will be allowed when drilling has proceeded without a drilling sump. Construction of the sumps will be provided by the Contractor.

DIVISION 2 Section 02670-23

DIVISION 2 Section 02670-23

D. The bore size of the well shall accommodate both the production casing, conductor casing, sanitary seal and the gravel pack ( if needed) to the depth indicated on the Schedule of Items or determined by the Contracting Officer.

E. The bore size of the first fifty feet of the well shall be four (4) inches larger than the outside diameter of the production casing. The well shall not exceed 400 feet in depth unless the Contracting Officer approves deeper drilling. At any time during the drilling operation the Contracting Officer may determine the production of water as adequate and halt the operation.

DIVISION 2 Section 02670-23

F. Once the maximum depth is reached, provided the Contracting Officer does not abandon the well or stop the drilling, the Contractor shall install casing as specified by the Contracting Officer’s Representative. Unless the Contracting Officer approves otherwise, drilling, casing and surface sealing shall be completed in a reasonably continuous operation.

DIVISION 2 Section 02670-23

DIVISION 2 Section 02670-7

A. During the drilling operation the Contractor shall have a geologist oberve and record a detailed and technically accurately written log of the material encountered and the elevations where changes in soil materials and water production occurred. The materials shall be classified as to the type of geologic formations encountered and shall minimally include varying degrees of consolidation of the geology, fractures, and color. Entries shall be dated and signed. The Contractor shall take particular care to locate and log all water-bearing strata and to determine the actual depth and type of water-bearing strata encountered. Other entries shall include static water levels and the times at which they were taken and casing information, including the lengths installed, the locations and lengths of slotted casing. The log shall be made available to the Contracting Officer during the drilling operations. Upon completion of the work, a copy of the log shall be filed with the State and a copy furnished to the Contracting Officer.

DIVISION 2 Section 02670-24

DIVISION 2 Section 02670-7

A. All well casing shall be handled and placed with sufficient care to avoid damage to casing sections and joints. All sections shall be swabbed with a 50 parts per million (ppm) disinfectant solution as they are lowered into the well. All sections of the well casing shall be joined by sound, water-tight solvent welds or mechanical joints (threaded or otherwise coupled). Casings shall be equipped with centering guides to ensure the uniform radial thickness of the annular seal and/or gravel pack. The length of well casing to be installed will be determined by the depth of the drilled well. The well casing shall extend the entire depth of the well, or to bedrock, whichever is encountered first. The bottom of the well casing shall be capped if agreed upon by Contractor and Contracting Officer. A length of perforated well casing shall be installed at locations as approved by the Contracting Officer. If the drilled hole is primarily comprised of unconsolidated materials, a gravel pack of two (2) inches thick minimum around the casing shall be provided such that it will produce a maximum yield from the water bearing zone.

DIVISION 2 Section 02670-24

DIVISION 2 Section 02670-8

A. After the well casing has been lowered into position and before the gravel packing and cementing operations begin, the Contractor shall, at no cost to the Government, test the well for plumbness and alignment. The finished hole shall be straight and true with not more than 3 inches horizontal variation per 100 feet of depth. The alignment must be satisfactory for the successful installation and operation of the permanent pumping equipment. Should the allowable variation be exceeded, the well casing shall be removed from the well and the plumbness and alignment of the well shall be corrected by the Contractor at their own expense.

DIVISION 2 Section 02670-24

DIVISION 2 Section 02670-8

DIVISION 2 Section 02670-8

A. In order to prevent the entrance of contaminated water, all annular space between the outer-most casing and the natural earth formation from a point at least 50 feet below the ground surface to the ground surface shall be completely filled with cement grout. The conductor casing, used to maintain annular space, shall remain in place during grouting to become a permanent part of the sanitary seal. Grouting shall be introduced via tremie or grout pipe from the lowest level of the annular space to be grouted. The grout shall slowly fill the annular space toward the surface in one continuous operation, filling the minimum, 2 inch annular space between the wall of the drilled hole and the outside of the casing. Grout shall not be allowed to free fall through water and in a manner that shall prevent the possibility of voids. Grouting shall be done in the presence of the Contracting Officer and an Inspector from the County.