Cedar_Butte_Eastside_Well_Spec.pdf

TABLE OF CONTENTS

SPECIFICATIONS NUMBER OF PAGES

01000 – GENERAL REQUIRMENTS 6

02525 – WATER SUPPLY WELLS 11

WORK DATA SHEET 1

FEBURARY 2025 GENERAL REQUIREMENTS

CEDAR BUTTE EASTSIDE WELL 01000 - 1

SECTION 01000 - GENERAL REQUIREMENTS

PART 1 - GENERAL

1.1 SUMMARY OF WORK

A. Project Description: This project will be to drill a well that provides 16 gallons per minute for future cattle troughs.

B. Location: Work under this Contract is located in Twin Falls County, Idaho. T12S R13E Sec 24 Cedar Butte Well is in an undeveloped area of BLM lands located approximately 16 miles south of Castleford, Idaho. The well is accessed from the corner of 800 E 2400 N. The work location is shown on the drawings.

1.2 REFERENCES

A. Referenced Specifications/Standards with Abbreviations and/or Acronyms: Wherever the following acronyms are used in these specifications or on the drawings, they are to be construed the same as the respective expressions represented. Copies of the referenced specifications/standards referred to herein may be procured by the Contractor, from the following:

ANSI American National Standards Institute ASSE American Society of Sanitary Engineering ASTM American Society for Testing and Materials AWS American Welding Society AWWA American Water Works Association CFR Code of Federal Regulations IEEE Institute of Electrical and Electronics Engineers, Inc. (The) MFMA Metal Framing Manufacturers Association MSS Manufacturers Standardization Society of The Valve and Fittings Industry Inc.

NECA National Electrical Contractors Association NEMA National Electrical Manufacturers Association NEC National Electric Code NFPA National Fire Protection Association NSF National Sanitation Foundation OSHA Occupational Safety & Health Administration UL Underwriters Laboratories Inc.

1.3 DEFINITIONS

CEDAR BUTTE EASTSIDE WELL 01000 - 2

A. Approvals: Approval of the submittals is an indication that the Contractor's submittals have been reviewed and that there are no objections, except as noted. Approval of deviations shall apply only to those deviations or omissions from the requirements of the drawings and specifications brought to the Contracting Officer's attention in writing. After approval of an item, submit a substitute for approval when the approved item cannot be purchased or delivered in time to avoid delay in completion of the project.

1.4 SUBMITTALS

A. Scope: Submittals include product data, shop drawings, quality control reports, manufacturers' literature, as-built drawings, samples, and operation and maintenance data.

B. Requirements: Refer to specifications for submittals required. Allow at least 10 working days for review. Submittals shall be delivered to the Contracting Officer’s Representative.

C. Identification of Submittals: Completely identify each submittal by showing at least the following information:

1. Name and address of submitter, plus name and telephone number of the individual to contact for further information.

2. Name of project as it appears in these specifications.

3. Contract number, drawing number, and specification section number to which the submittal applies.

4. Whether this is an original submittal or resubmittal.

5. Each item shall clearly note the manufacturer's name and address, trade name, product, lot, style, color, catalog designation or model number, and locations of use.

1.5 CERTIFICATES OF CONFORMANCE

A. Requirements: The Contracting Officer may permit use, prior to sampling and testing, of materials when accompanied by Certificates of Conformance. Materials used on the basis of a Certificate of Conformance may be sampled and tested. Installation of materials on the basis of Certificates of Conformance shall not relieve the Contractor of responsibility for incorporating materials which conform to the requirements of the drawings and specifications. Material not conforming to those requirements will be subject to rejection, whether in place or not.

B. Format: The Certificate of Conformance provided by the supplier shall:

1. State that the named product conforms to the Contract requirements.

2. Either be accompanied with a certified copy of the test results or certify that such test results are on file with the manufacturer and will be furnished to the Contracting Officer upon request.

3. Provide the name and address of the manufacturer, the testing agency, and the date of tests.

4. Set forth the means of identification which will permit field determination of the product delivered as being the product covered by the certification.

CEDAR BUTTE EASTSIDE WELL 01000 - 3

1.6 QUALITY ASSURANCE

A. Codes and Standards: The work shall comply with codes and standards applicable to each type of work and as listed in the individual sections of these specifications. This Contract incorporates materials, applications, and tests by reference, with the same force and effect as when they were given in full text.

1.7 PROJECT/SITE CONDITIONS

A. Access to the Work: Access to the worksite is accessed from the corner of 800 E 2400 N and a BLM road. The site location is T12S R13E Sec 24.

B. Environmental Considerations: Areas that have become saturated with oil, gasoline, or bituminous products shall be excavated to a depth of 12 inches beyond the contaminated material; backfill with approved material. Excavated material shall be disposed of offsite in a legal manner. Excavation and disposal of contaminated material shall be performed at no additional cost to the Government. Prescribed measures to prevent water pollution to nearby water resources shall be strictly observed. Silt fencing and other sediment and erosion control measures shall be employed, as necessary.

C. Public Access and Safety: The site will remain open to the public during construction. The Contractor shall take necessary measures to ensure public safety at all times. Portions of the site can be closed to the public use as needed for construction purposes after being approved by the Contracting Officer. The Contractor shall be responsible for providing, installing and maintaining barriers and other closure devices needed. Any excavation shall be barricaded or otherwise adequately protected to provide public safety when actual work is not taking place in the excavation.

1.8 SEQUENCING AND SCHEDULING

A. Work Schedule: The schedule shall be submitted at the pre-work conference. When requested, submit an updated schedule within 3 calendar days. As a minimum, the estimated start and completion dates shall be shown in the estimate.

PART 2 - PRODUCTS (Not Used)

PART 3 - EXECUTION

3.1 PROJECT MEETINGS

A. Pre-Work Conference:

1. Will be held prior to the start of work. The Contractor will be notified in advance of meeting time, date and place. The purpose will be to review required work, project

CEDAR BUTTE EASTSIDE WELL 01000 - 4

drawings and specifications, construction schedules, payroll and payments, and administrative provisions of the Contract.

2. The Contractor, subcontractors and the persons responsible for coordination of the work shall be present at the meeting.

3. Be prepared to summarize and explain procedures planned for the project and present the submittals requested in the specifications.

B. Progress Meetings:

1. To be held at the project site, or as determined by the Contracting Officer.

2. May be called by either the Contracting Officer or the Contractor. Request shall state who should attend and include an agenda.

C. Final Inspection:

1. To be held at the project site, or as determined by the Contracting Officer.

2. Notify the Contracting Officer in writing at least 5 working days before the completion date so the Government can schedule final inspection.

3. The superintendent shall be present during this inspection.

3.2 DISPOSAL OF DEBRIS

A. Requirements: Items or debris not designated as salvage for the Government shall become the property of the Contractor. Disposal of materials in a legal manner and payment of fees required is the Contractor's responsibility. Sale of material onsite is not allowed unless authorized in writing by the Contracting Officer. When hazardous materials are encountered during demolition operations, comply with applicable federal, state, and local regulations, laws, and ordinances concerning removal, handling, and protection against exposure or environmental pollution. Burning of removed materials is not permitted on the work site.

3.3 AS-BUILT DRAWINGS

A. Requirements: A complete set of full-sized prints, furnished by the Contracting Officer for this purpose only, shall be kept at the site. As the job progresses, continuously maintain as-built drawings of the work. The changes shall be noted legibly in red pencil or red ink. These drawings shall be submitted to the Contracting Officer prior to final inspection.

3.4 WARRANTY

A. Requirements: Materials and equipment furnished under this Contract shall be covered by the most favorable commercial warranties given to customers for such materials or equipment. The rights or remedies provided herein are in addition to and do not limit rights afforded to the Government by other clauses of this Contract. With respect to warranties, expressed or implied, CEDAR BUTTE EASTSIDE WELL 01000 - 5 from manufacturers or suppliers for materials or equipment furnished under the Contract the Contractor shall:

1. Obtain warranties that would be given in normal commercial practices.

2. Require warranties to be executed, in writing, for the benefit of the Government.

3. Submit warranties to the Contracting Officer prior to the final inspection.

3.5 TRAINING OF GOVERNMENT EMPLOYEES

A. Requirements: Prior to final acceptance, provide instruction for employees designated by the Government in the operation and maintenance of each system and its equipment.

PART 4 - MEASUREMENT AND PAYMENT

4.1 METHOD AND MEASUREMENT

A. Units: There will be separate measurement for individual items of work done under this Contract. Below includes a general description of work included in each pay item.

B. 01000(01) Mobilization: This item includes all work required to mobilize and demobilize from the project site.

1. When 5% of the original Contract amount is earned from other bid items, 50% of the amount bid for mobilization or 5% of the original Contract amount, whichever is lesser, will be paid.

2. When 10% of the original Contract amount is earned from other bid items, 100% of the amount bid for mobilization or 10% of the original Contract amount, whichever is lesser, will be paid.

3. Upon completion of work for the project, payment of the amount bid for mobilization in excess of 10% of the original Contract amount will be paid.

4. The total sum of all payments shall not exceed the original Contract amount bid for mobilization, regardless of the fact that the Contractor may have shut down the work on the project or moved equipment away from the project and then back again.

C. 01000(02) Well drilling and casing: This item includes all work required to drill and furnish, install pitless adapter, and any other incidental work. It will be measured for payment by the Linear Foot.

4.2 BASIS OF PAYMENT

A. Payment: Payment will be made at the Contract price, as indicated in the Bid Schedule, and will include full compensation for the work described in the Contract. If no pay item exists for a portion of the work, include the costs in a related pay item. Payment will be made under:

CEDAR BUTTE EASTSIDE WELL 01000 - 6

Pay Item Pay Unit

01000(01) Mobilization Lump Sum 01000(02) Drilled Well Hole, 12" Diameter Linear Foot 01000(03) Drilled Well Hole, 10" Diameter Linear Foot 01000(04) Steel Well Casing, 8" Diameter x 40' Linear Foot 01000(05) Steel Well Casing, 8” Linear Foot 01000(06) Develop Well Lump Sum 01000(07) Pump Test Lump Sum

END OF SECTION 01000

FEBURARY 2025 WATER SUPPLY WELLS

CEDAR BUTTE EASTSIDE WELL 02525 - 1

SECTION 02525 - WATER SUPPLY WELLS

PART 1 - GENERAL

1.1 SUMMARY

A. This section includes construction of water wells using conventional drilling methods, including record keeping, casing, well screen, gravel packing, formation seal(s), grouting, pitless adapter, capping of well, water quality testing, construction of well platform.

1.2 DEFINITIONS

A. Listed and Labeled: The terms “listed” and “labeled” as defined in the National Electric Code, Article 100.

1.3 SUBMITTALS

A. Drilling Program: Within 10 calendar days after the date of receipt of notice to proceed, submit a complete and practicable drilling program. The program shall provide for orderly performance of the work and be in such form and detail as to show the following:

1. Sequence of drilling operations.

2. Drilling method, including make and model of drill rig.

3. The days of the week and month that work is to be performed.

4. The number and length of each shift per day. The length of a shift may be extended in the field as required to avoid interrupting a drilling and testing operation.

5. Plan for mud pits and disposal of waste.

6. Development method to be used, including the size and/or rating of the proposed equipment.

7. Submit proof of Idaho license to perform the work (Idaho Code 42-238) and proof of five

(5) years of well drilling experience.

B. Certificates of Conformance: Submit a copy of written certification from the supplier of the Contractor-furnished equipment listed below to be used on this project that it conforms to the requirements of this specification section:

1. Casing.

2. Grout.

3. Well cap.

4. Screen.

5. Gravel Pack

6. Pitless adaptor.

C. Drawings: Submit a copy of drawings or catalog cuts showing water well components. Detail drawings or catalog cuts shall include a cross section showing the relative size, location, and

CEDAR BUTTE EASTSIDE WELL 02525 - 2

spacing of the well components such as the hole size, casing, well screen, gravel filter, grout, pump intake level, and pitless adaptor.

D. Daily Record: A copy of the daily record, as specified under “Quality Assurance”, below, shall be submitted to the Contracting Officer upon completion of work each day. The form of the daily report shall be approved by the Contracting Officer prior to the start of work. Information recorded by the daily report shall include, but is not limited to:

1. Time of start up and shut down.

2. Time of any standby periods with explanation of reasons therefore.

3. Type of work (drilling, development, test pumping, standby, etc.).

4. Number of personnel and equipment on job.

5. Depths - referenced from “drilling datum” of:

a. Top and bottom of each stratum penetrated.

b. Depths from which cutting samples are taken.

c. Static water level - measured beginning of each shift and at observed changes in water level.

d. Well screens and accessories installed in the well.

e. Perforations of well casing.

6. Type of material encountered.

7. Well casing - Length, size and grade of each piece assembled and cumulative total length of casing assembly.

8. Any drilling difficulties, and adjustments or corrections to the work.

9. Weather conditions.

10. Amount of water disposed of on-site and any difficulties related to disposal.

11. Any problems that might result in a change of conditions or contract negotiations.

E. Driller’s Logs: At the completion of the work, the Contractor shall submit a driller’s log for each hole drilled. The log shall summarize the following information:

1. Size of drill hole and method of drilling.

2. Depths: referenced from “drilling datum” of:

a. Top and bottom of each strata formation encountered.

b. Water bearing formations.

c. Static water level - measured beginning of each shift and at observed changes in water level.

d. Finished well.

e. Well screens and accessories installed in the well.

3. Identify the material in each stratum.

4. Well casing - material, length, diameter, thickness, weight per foot of length and grade of each piece assembled and cumulative total length of casing assembly. Include the depth below grade that casing was installed and any changes in size of casing.

5. Screen: Material, construction, length, diameter, and opening size.

6. Well completion date.

7. Upon completion of the well, the log shall be prepared and signed by the Contractor, and submitted to the Contracting Officer for approval.

CEDAR BUTTE EASTSIDE WELL 02525 - 3

F. Samples: Take samples, approximately 16 ounces, of substrata formation at 20-foot intervals and at all pronounced changes in formation throughout entire depth of each well. Carefully preserve samples on-site in suitable containers properly labeled for identification (plainly marked to show the well description and the depth below the ground surface at which the sample was taken).

G. Field Test Reports: Submit field test reports for the following:

1. Pump test.

2. Water quality analysis.

3. Plumbness and alignment test.

1.4 QUALITY ASSURANCE

A. Regulatory Requirements: Each system, including equipment, materials, installation, and workmanship shall be in accordance with the standards and regulations of the state of Idaho regarding water wells and water systems.

B. Reference Standard: Well construction shall comply with all applicable provisions of AWWA A100, IDWR’s IDAPA 37, and ASNI/NGWA-01-14 Water Well Construction Standard.

C. Records and Logs: The Contractor shall keep an accurate daily record of all work. Daily records shall be kept current during the progress of the day’s work in a neat and legible report form. They shall be available for examination by the Contracting Officer at all times during the work.

D. Well Driller Qualifications:

1. The well driller shall be licensed as required by the State of Idaho with a minimum of 5 years’ experience and shall comply with all the laws of the State pertaining to water well drilling.

2. The Contractor is responsible for submitting all well construction records required by the State, with a copy to the Contracting Officer.

3. Final well construction information shall be recorded on forms furnished by the State.

E. Testing Agency Qualifications: Certified by the EPA or State to analyze water for bacteriological, physical, and chemical quality.

1.5 DELIVERY, STORAGE, AND HANDLING

A. Deliver materials in an undamaged condition.

B. Store materials off the ground to provide protection against oxidation caused by ground contact.

Replace defective or damaged materials with new materials at the Contractor's expense.

CEDAR BUTTE EASTSIDE WELL 02525 - 4

1.6 SEQUENCING AND SCHEDULING

A. Follow the approved drilling program.

PART 2 - PRODUCTS

2.1 MATERIALS

A. Casing: Materials specified shall be new and free from defects. No used or old material will be accepted. However, when necessary or desirable to use temporary casing, the temporary casing may be used casing, subject to the approval of the Contracting Officer.

B. Steel Casing: Steel casing shall be either seamless or electric-welded black steel pipe, with either welded or threaded and coupled joints conforming to ASTM A 53 Grade B, or line pipe conforming to API 5L, either Grade A or B. Each section of steel casing shall be marked to show the diameter, standard number, weight, wall thickness, and United States manufacturer.

C. Steel Casing Joints: Shall be watertight and may be either welded or threaded and coupled.

Welded joints shall be full penetration of the casing wall.

D. Bio-Degradable Drilling Fluid: NSF 60 certified drilling additives only (i.e. Drispac Plus Regular, Alcomer 123L, etc.) The material shall be certified by the manufacturer to dissolve and breakdown when dosed with chlorine.

E. Drilling Foam: Certified by the manufacturer for use with approved type of drilling rigs. Shall be NSF 60 certified.

F. Steel Well Screen: Well screens shall be of the continuous slot design to provide maximum open area to reduce entrance velocity, increase hydraulic efficiency and promote more effective development. The screens and end fittings shall be made of Low Carbon Steel. Screen to be V-shaped openings that widen inwardly or provide standard slot size screen (.035). Screen slot openings shall be completely clean and free of burrs, frayed edges and cuttings. Screen shall have a K-packer for insertion into the casing. Johnson or approved equal. Recommend the size of screen to be approved by the Contracting Officer.

G. Formation Stabilizers: Shall be Approved Seal Material as per the IDAPA 37.303.09.

H. Filter Packing: After reaching the water-bearing zone and test pumping indicates that gravel packing will be required, obtain samples of the sand formation and recommend the size and quantity of gravel packing required to the Contracting Officer for approval. Submit material samples and analyses along with the recommendation. Shall be Artificial Filter Pack as per the

IDAPA 37.303.09.

I. Casing Centralizers: If utilized, shall be steel sized to fit the casing and the hole, spaced at 60 foot maximum intervals.

CEDAR BUTTE EASTSIDE WELL 02525 - 5

J. Auxiliary Piping: Provide discharge piping to dispose of pumped water during developing and testing of well. Locate the discharge flow at a sufficient distance from each well to prevent flooding, erosion, and flow back into well.

K. Well Cap: Baker Water Systems Part No. 6WTCL or approved equal. Manufactured well seal providing a compression seal with penetration for piping and cables, which fits into the top of the casing and is removable, waterproof and vermin-proof.

L. Pitless Adapter: NSF 56 fitting, of shape required to fit onto casing. Include waterproof seals and threaded pipe connections.

M. Depth Test Apparatus: Provide a depth test apparatus consisting of a pressure gauge, air pump connection, and drawdown tubing. Or can utilize e-tape and/or transducer.

1. Pressure Gauge: Water level gauge, Model # A-566 as manufactured by Ametek Inc., US Gauge Division, or approved equal. Steel case, 4-1/2 inch diameter, ±3-2-3 percent accuracy, 0 to 390-foot range, adjustable dial to permit reading water level in feet below the ground surface.

2. Air Valve: Schrader type, 1/4-inch MPT standard, Type I.

3. Drawdown Tubing: Tubing shall be 3/8-inch (OD) 1/8-inch (ID) polyethylene.

2.2 EQUIPMENT

A. Drilling Equipment: Shall be that required to drill well according to the drilling method specified. Shall be capable of achieving a depth of 1.5 times the depth listed on the Work Data Sheet.

2.3 MIXES

A. Grout:

1. Type II Portland cement, water, and sand and a maximum of 2 percent calcium chloride.

Portland cement shall meet the requirements of ASTM C 150 and the calcium chloride shall meet the requirements of ASTM D 98. Mixed grout shall be 1 part Portland cement and 3 parts sand mixed with no more than 6 gallons of water per 94 pound sack of cement to form a workable mix. Water shall be potable.

2. Formation stabilizer may be bentonite gravel material free of dirt and foreign matter or bentonite grout (i.e. Black Hills Ultra Grout or equivalent) mixed to a specific gravity of

9.75 to 9.85 pounds per gallon with a solids content of 22% to 25%. Bentonite gravel may not be poured through more than 200 feet of water.

PART 3 - EXECUTION

3.1 PREPARATION

A. Clearing: Limit worksite clearing to a maximum 50 foot by 50 foot area or as designated by the Contracting Officer.

CEDAR BUTTE EASTSIDE WELL 02525 - 6

B. Site Preparation: Minimize surface disturbance at sites. Level construction sites only as necessary for drilling operations. Cut or fill slopes shall not be steeper than 4:1, unless approved otherwise.

3.2 WELL LOGS AND SAMPLES

A. Well Log: Keep a complete well log as required by State law, and check formations and enter the results in the log for intervals not to exceed 20 feet. The log of the well shall show material penetrated and full descriptive notes made of each stratum found by the drill and difficulties, or unusual conditions met in drilling. Water-bearing strata shall be described in detail as to loose or compact material, color, and if gravel, whether it is water-worn or angular. The presence of clay shall be noted. The log must be kept up-to-date with the progress of the well drilling, and shall be available for inspection by the Contracting Officer during the drilling operations.

Furnish one copy of the complete log to the Contracting Officer after completion of drilling.

B. Samples: Take a cuttings sample at each apparent change in the materials penetrated, or every 20 feet, whichever is lesser. If drilling is proceeding beyond the estimated depth for the well, STOP and confirm with the contracting officer if drilling should continue. If continued, take samples at 15-foot intervals. The sample shall be placed on the ground away from operations and labeled in plain view for the Contracting Officer. The Contractor shall recommend a screen size to the Contracting Officer, based on the samples. The Government will have 24 hours to accept or reject the recommendation.

C. Information for State Filing: The Contractor shall obtain all Drilling Permits and furnish the Contracting Officer with drilling information required by State law for filing on water wells and prepare and submit reports required of the driller by State law. The well driller shall obtain any drilling permits required by IDWR.

3.3 WELL CONSTRUCTION

A. Drilling: For the first 38 feet, drill the hole of sufficient diameter to accommodate the specified casing and grout seal, but not less than 12 inches in diameter. Below 38 feet, the hole shall be of sufficient diameter to accommodate the specified well casing. Drill depth shall be as shown on the drawings and/or the Work Data Sheet. Methods of construction shall be as approved by the Contracting Officer and include drilling mud for conventional fluid rotary drilling or reverse circulation drilling. Drill straight, plumb, and circular from top to bottom. The hole below the outer casing shall fully penetrate the water-bearing stratum a sufficient depth to produce the required amount of water without causing excessive velocities through the aquifer. Diameter shall be not less than 10 inch for 8-inch nominal size casing and large enough to accommodate tremie pipe.

B. Grout: Grout casing from the bottom upward to effectively seal the annular void. Place grout utilizing a tremie pipe from the bottom up. Grout shall be installed continuously at a rate slow enough to ensure a tight efficient seal. A minimum of 50 percent excess amount of grout material shall be on site during the grout installation procedure. The tremie pipe shall be withdrawn as the seal is placed. Contractor shall utilize a grout retainer or shall allow the cement grout to cure for a minimum of 72 hours prior to resumption of drilling operations.

CEDAR BUTTE EASTSIDE WELL 02525 - 7

C. Inner Casing: Install the inner casing and well screens concentrically in the outer casing and drill hole. Fill the void between the outer casing and the inner casing with neat cement grout to seal the inside wall of the outer casing to the outside wall of the inner casing. Provide centralizers at the bottom of the casing and at other critical grouting points such as zones of unsuitable water quality. Provide a suitable grout retainer at the bottom of the inner casing so that grout does not leak into the bottom of the well. The hole shall be cased the full depth unless casing of a portion of the well is deemed unnecessary by the Contracting Officer. If the Contracting Officer determines that casing is not required to full depth in consolidated formations, the casing shall extend at least 5 feet into the formation to assure a proper seat and bottom seal, and the Contractor shall affect a proper seal. The joined casing string shall be installed in a predrilled hole and lowered into place with the drilling machine utilizing clamps, elevators, or other mechanical devices. Casing shall not be dropped onto the bottom of the well hole, nor forced down against the bottom of the hole during installation. Casing shall be kept continually suspended during and after installation, until such time that all of the gravel pack and formation stabilizer material have been properly installed.

D. Perforated pipe: Provide perforated pipe at the water bearing layer(s) to be developed to secure available flow as shown in the drawing and the Work Data Sheet. Seal the bottom of the deepest perforated pipe with a threaded or welded plug, consisting of the same material and thickness as the perforated pipe body, or a welded plate, consisting of the same material and thickness as the perforated pipe body or casing. The Contractor shall select the installation method, in accordance with the perforated pipe manufacturer's recommendations. Perforated pipe may have either a welding ring or a pipe-thread end fitting.

E. Gravel Envelope: Fill the entire void between the screen and the outside wall of the underreamed hole with gravel. The Contractor shall install gravel pack material 10 to 20 feet below (rat hole) and 10 to 20 feet above each screened zone as determined by the Contracting Officer upon review of the logs. The Contractor shall determine the volume of gravel pack material that will be required for each screened zone, based on the size of the screen and size of the hole drilled. The Contractor shall use a 1/2-inch minimum I.D. tremie pipe as an agitator for the gravel packing operations, or a minimum one-inch tremie if the gravel and/or formation stabilizer/grout is to be pumped in. Gravel pack and formation stabilizer will be continually tagged with the tremie as it is placed. Placement of gravel pack, formation stabilizer, and grout shall be performed in the presence of the Contracting Officer. Disinfect and place the gravel with a tremie pipe in accordance with Articles 54 and 50 of EPA 570/9-75-001. Control speed of gravel placement to prevent bridging and to allow for settlement of the gravel. Gravel placement equipment and gravel placement methods shall be approved by the Contracting Officer prior to commencement of work.

1. Placement using the tremie pipe as both a depth probe and agitator: Contractor will need to predetermine the volume or weight of gravel pack material required to fill one foot of annular space in the well. Lower the tremie pipe into the annular space between the casing and the wall of the bore hole to the lowest point to be gravel packed. Note and record the level at which the bottom of the tremie pipe is below the surface of ground.

Raise tremie pipe 5 feet and slowly pour or pump a predetermined quantity of gravel pack material into the annular space along the side of the tremie pipe (in even 1-foot increments) equal to no more than 5 feet of depth in the annular space before checking to see if the material has reached its prescribed destination using the tremie pipe as a depth probe. If, when pouring the gravel pack down the annulus, it is determined that the gravel pack material has not raised in the annular space to the level as calculated, the Contractor shall use the tremie pipe to loosen any bridging that may have occurred

CEDAR BUTTE EASTSIDE WELL 02525 - 8

further up the annular space by lifting, lowering and shaking the tremie pipe, including circulating water down through the tremie pipe, if needed. It may also be necessary to stretch, shake and attempt to rotate the casing in conjunction with the above procedure in order to break through bridged areas. If it is determined that the gravel pack volume is insufficient (due to oversized hole or washout), add additional gravel in one-foot increments until the pack can be tagged with the tremie. Repeat the above procedure as necessary until installation is satisfactorily completed in accordance with these specifications.

2. Water Bearing Formation Seal: Install bentonite gravel or pellet material for a thickness of ten feet directly above the gravel pack. This material shall be installed in the same manner as the gravel packing. Installation of the seal shall be performed in the presence of the Contracting Officer.

F. Formation Stabilizer: Install formation stabilizer material in the remaining zones in the well which do not require gravel pack material or surface grout. Formation stabilizer shall be installed in the same manner as the gravel packing or, as bentonite grout pumped in with a tremie from the top of the bentonite seal over the gravel pack to the surface (bottom up).

Installation of the formation stabilizer shall be performed in the presence of the Contracting Officer.

G. Well Development: Set the casings and allow the neat cement grout to harden a minimum of 72 hours prior to well development. Provide well development in accordance with Article 52 of EPA 570/9-75-001, except explosives will not be permitted. Furnish pumps, compressors, plungers, bailers, and other equipment required to fully develop the well for the maximum yield of water per foot of drawdown and to limit sand intrusion during the life of the well.

Developing equipment shall be of an approved type and of sufficient capacity to remove all cutting fluids, sand, rock cuttings, and any other foreign material. Pump the well free of sand, mud, drillings, and other foreign matter. Maximum sand concentration at the completion of well development shall be 2.0 ppm. The turbidity shall be less than 5 on the Jackson Turbidity Scale specified in AWWA. The well shall be thoroughly cleaned from top to bottom before beginning the well tests.

3.4 FIELD QUALITY CONTROL

A. After the well has the pump test run, water quality samples shall be collected from the in-place water and submitted to an approved testing laboratory for complete chemical and bacteriological analysis. The approved testing agency shall be certified by Idaho DEQ to make bacteriological, physical, and chemical analyses of water from each finished well and report the results. Make analysis according to requirements of authorities having jurisdiction. Contractor shall identify the proposed testing lab and include in prepared submittals. Report the results.

B. Pump Test: Upon completion of the permanent well, provide and set a temporary pump in the well with a capacity of not less than 1.5 times the design flowrate (test flowrate equals 1.5 times the design flowrate). After determining the static water level in the well, begin pumping at 50 percent of the test flowrate, measure and record the pumping level at 5-minute intervals until drawdown stabilizes (stabilization shall be less than 6 inches of drop in water level over an uninterrupted 60-minute period). Repeat procedure for 75 and 100 percent of the test flowrate.

Pump until the capacity of the well is determined or until the test flowrate is reached. The yield

CEDAR BUTTE EASTSIDE WELL 02525 - 9

of the well shall be the test flowrate at the corresponding drawdown or the flowrate at which drawdown is stabilized just above the temporary pump (if drawdown reaches the pump before 100 percent of the test flowrate is achieved, reduce flowrate until water level stabilized just above the pump). After determining the yield of the well, continue pumping at that rate for one hour. Coordinate with Contracting Officer to determine where to divert water at the well site.

1. Water level to be measured by sounder, by air line method, or other approved means.

Flowrate to be determined by flowmeter, by timed filling of a drum, or other approved method.

2. Furnish a complete written log of the pump test – showing depth of temporary pump setting, state water level, pumping rate and drawdown at the specified intervals. Also, note the general clarity, color, and odor of the water, presence / amount of sand, etc.

C. Well Plumbness and Alignment Test: Upon completion of the permanent well, provide a well plumbness and alignment test using a plummet in accordance with Article 51 of the EPA 570/9-75-001. Perform the test on the entire depth of the well. The plumb or dummy shall move freely through the entire depth of the well. The well shall not vary from the vertical in excess of two-thirds of the smallest inside diameter of that part of the well being tested per 100 feet of depth. Correct defects in plumbness and alignment and repeat test until the work is in compliance with contract requirements.

3.5 DRILLING WASTE

A. Waste Disposal: Drilling waste such as drilling fluid and drill cuttings shall be removed so that wastes will not interfere with installation of the well platform and pumping equipment and will not pollute surface waters or cause contamination of the well. Dispose of drilling waste by spreading the cuttings onsite to a depth of no more than 1”, unless otherwise authorized in writing by the Contracting Officer.

3.6 ABANDONMENT OF THE WELL

A. Abandonment Due to the Contractor's Actions: When the drilled well must be abandoned because of lost tools, damaged well, misalignment, or other causes attributed to carelessness or poor workmanship, pull casing (if installed) that can be removed. Fill the hole with grout, puddled clay or other impervious earth material according to State regulations and requirements. This work will be at no additional cost to the government. The Contractor shall then drill a new well within 10 ft of the original well at no additional cost to the Government.

B. Abandonment Due to Other Causes: When the well must be abandoned because of inadequate quantity or quality of the water, or for another reason not the fault of the Contractor, pull the casing (if installed) that can be removed. Fill the hole with grout, puddled clay or other impervious earth material according to State regulations and requirements. The order to abandon the well must be in writing from the Contracting Officer.

C. Casing: Casing that can be removed shall be removed. The Government will retain ownership of the casing. If the casing cannot be removed, it shall be closed with a steel cap tack welded to the casing. The name of the well, total depth drilled, static water level, if any, and the date shall

CEDAR BUTTE EASTSIDE WELL 02525 - 10

be plainly and permanently marked by welding beads on the protruding part of the casing. The annulus around the casing shall be filled with grout, puddled clay or other impervious material according to State regulations and requirements.

3.7 SANITARY PROTECTION OF WELL

A. General: Protect the well during the construction period to prevent tampering or seepage of contaminated water, petroleum products, or other contaminants into the well from the ground surface.

B. Seal: When the well is completed, install a cap compression seal designed to prevent pollutants from entering the well. The watertight casing or pitless wellhead shall extend above the well platform as shown on the drawings. Seal or screen (#24 mesh) equipment that permits direct access to the well to prevent entrance of foreign matter or contaminants.

C. Pitless Adapters: The specified installation shall be complete including fittings and 10 feet of discharge line. Excavate around the existing casing as specified. Connect the drop pipe and horizontal discharge line to the adapter or unit according to the manufacturers' instructions.

Connections shall be watertight. The horizontal discharge line shall be below the frost line.

Field test per State requirements.

1. Pitless Adapters: The outside section of the adapter shall connect onto the well casing below the frost line. The adapter shall be connected to the casing by clamp-and-gasket or by welding. The casing shall extend above natural ground a minimum of 18 inches. Cut a hole in the casing specified for the horizontal discharge line or adapter.

D. Grading: Slope the ground and concrete slab immediately surrounding the top of the well casing or pitless wellheads away from the well in all directions, as shown on the drawings.

E. Correcting Contamination: If the well becomes contaminated, or water with undesirable physical or chemical characteristics enters the well due to the neglect of the Contractor, corrective work including the supplying of casing, seals, sterilizing agents, or other materials necessary to prevent contamination of the aquifers shall be performed at the Contractor's expense.

3.8 WELL PLATFORM

A. General: Construct a ¾” minus crushed base around the well as shown on the drawings. The casing shall extend above the platform as shown on the drawings. The area shall be at 3 feet square by 4 inches thick. The top of the casing shall extend 18 inches above the top of the base but not to exceed 24 inches.

3.9 CLEANUP

A. Requirements: Upon completion of the well construction and other incidentals, remove the debris and surplus materials resulting from the work from the jobsite.

CEDAR BUTTE EASTSIDE WELL 02525 - 11

END OF SECTION 02525

WORK DATA SHEET

For

Cedar Butte Eastside Well

Name of Well Desired

Min. Yield

(GPM)

Est. Drilling Depth

(ft)

8” Steel Casing

(LF)

.035 V-Slot Stainless Steel

Screen

(LF)

.025 Slotted

SDR17 PVC

Screen

(LF)

8” Steel Casing

(LF)

Surface Grouting

(LF)

Gravel Packing/Bent.

Seal

(LF)

Formation Stabilizer

(LF)

Cedar Butte Eastside Well

16 850 712 20 80 40 38 110 740

1. Flowing artesian conditions are not anticipated.

2. Wells with over 500’ of formation stabilizer, or wells with greater than 200’ of water above gravel pack, will require bentonite OR cement grout pumped in from the top of the bentonite seal (bottom up) via a tremie pipe or through the casing.

3. If an adequate water supply zone is encountered before the total estimated depth is reached, continue to drill to a depth of 100 feet below the water bearing zone before drilling is terminated.

4. Well drilling and testing must be done by a contractor currently licensed and in good standing with the Idaho Dept. of Water Resources.