EllisTrust2_V1.pdf

ELLIS TRUST 2 WATER WELL

STATEMENT OF WORK & SITE LOCATION

CASPER FIELD OFFICE

HIGH PLAINS DISTRICT

W yom ing - H igh P lains D istrict O ffice

O ffice N am e and S tate goes here

WORK DATA SHEET

For

Drilling Ellis Trust 2

WATER WELL

Name of Well Desired Min.

Yield (GPM)

Estimated Drilling Depth

(ft)

Estimated Casing

(Lin. Ft.)

.020 V-Slot Stainless

Steel Screen (Lin. Ft.)

Formation Stabilizer (Lin. Ft.)

Gravel Packing

.020 silica sand

(Lin. Ft.)

Surface Grout and Prot.

Casing

(Lin. Ft.)

Water Producing Formation

Ellis Trust 2 Well T. 38N R. 82W Sec. 30

SENW

3 340 320 20 315 20 5 Shannon

1. A flowing artesian well is not anticipated for this well.

2. Closest water availability for drilling is in Casper, WY or Waltman, WY. There is a reservoir next to site but will likely be dry.

3. The wells have easy access via a two-track trail.

4. The well be drilled using a minimum 9 ½ inch bit.

5. 5.5” PVC certalok casing, 20’ lengths, will be used and provided for by the contractor.

6. All items will be furnished by the contractor.

7. Centralizers will be installed to center the casing in the bore hole. Centralizers will be spaced every 40’.

Centralizers must be positioned to allow the proper placement of sealing material around the casing within the interval to be sealed.

8. All work must be performed by a licensed well driller and follow the guidelines as set forth in the Wyoming Water Well Minimum Construction Standards.

9. After drilling of the well and before installation of well equipment the government will test the water ph and electrical conductivity. If water quality testing does not meet standards for livestock the well will be plugged and abandoned by the contractor according to WYSEO guidelines. The contractor must negotiate with the CO to determine a fair and reasonable price.

10. Disinfect the well according to standards (see 02674P.l and 3.11).

11. All drill cuttings shall be graded to blend with the surrounding area.

WORK DATA SHEET

For

Equipping Ellis Trust 2

WATER WELL

T. 38N R. 82W Sec. 30 SENW

Summary:

Equipping and installation of water well equipment on the Ellis Trust 2 Water Well. The project will consist of equipping the well with a solar pump and two 8’ tire troughs with associated equipment. Estimated capacity of the well is 2.5 gallons per minute with the pump set at 340’. The capacity of the well will be finalized at the conclusion of the drilling. If the estimated capacity is different than the finalized capacity the contractor must inform the CO/COR. If the finalized capacity will change the well setup the contractor will negotiate the new equipment and price with the CO.

Contractor Furnished Materials:

All materials needed to complete the well to specifications will be provided for by the contractor.

Responsibilities:

a. Contracting Officer (CO):

The CO is the official spokesperson for this project. The CO is the sole person who can authorize any changes during construction.

b. Technical Representative (COTR):

The technical representative has the authority to review the practice during construction and conduct necessary tests and quality control reviews to ensure that all work is in compliance with the construction plan. The technical representative reviews all construction changes and insures that the CO approves prior to installation. The technical representative maintains a job diary and/or construction notes and prepares as-built drawings of the project.

c. Contractor:

The contractor has a contractual agreement with the CO for the project installation as set forth in the construction plan. The contractor shall not make changes to the construction plan without technical representative and CO approval. The contractor shall comply with all applicable permits and conduct the work in a safe manner.

Permits:

Electrical work must be done by certified solar panel installer and follow all guidelines as set forth by the state of Wyoming. The water well permit will be submitted to the Wyoming State Engineers Office by the government and provided to the contractor before drilling begins.

Basis of Award:

Contract will be based on past performance, technical specifications and price.

Design:

The contractor will need to design and install a solar pump system for the well. The well will be used primarily in the spring and fall though all plumbing material should be designed for cold temperatures. The installation will include a solar pump/motor, drop pipe, pump/motor wire, check valve(s) in drop pipe (if pumps not sufficient for depth), pitless adapter, safety cable/rope for pump/motor, pump/motor controller, circuit breaker box, grounding rod/wire, solar panels and wiring, solar rack mounts (either top of pole mount or ground mount) and any other equipment needed to have a fully operational solar livestock water well. A 1/8” weep hole will need to be drilled in the drop pipe. Tape wire to drop pipe every 20’ joint. Tape must be approved for water well use, ie green tape (2” cold weather vinyl cable and pipe wrap tape).

The solar rack will need to be designed for high winds.

A concrete pad, 3’x3’x4” will need to be poured around the wellhead. An 8” steel casing buried from 3’ below surface to 18” above surface will need to be installed to protect the certalok casing. The contract will also include installation of two livestock tire troughs, 8’ diameter. The installation will include all plumbing from the well to the tire troughs and overflow, see engineered design sheet. Each tire trough will have an 8’ gravel pad installed out from the edge of the tire trough and 8” deep to grade. The tire troughs will be installed at least 50 from the wellhead and slightly uphill as to allow water from the supply line back into the well as to prevent freezing. Tire troughs will be buried at same elevation with 20” of the tire above surface.

See spec. sheet (614-02). Gravel will be ¾” limestone (gray). 24” diameter CMP or PE pipe will be placed in center of trough to protect piping and cemented in. The supply line from the well will fill both tanks simultaneously. A float valve will be installed and connected to the controller as to turn off the pump when the tanks are full.

Plumbing:

See “Material Specification” in the Appendix for acceptable plastic pipe. Plumbing from the well to the tire troughs will be buried 5’ below surface. Backfill will be compacted. Plumbing between the tire troughs will also be buried 5’ below surface and the backfill compacted.

Overflow plumbing from the second trough will start buried at least 18” and angled slightly downslope until reaching the overflow point. The overflow will be rocked with at least 4-6” diameter rocks and minimum surface area coverage of at least 2’x4’ as to prevent erosion.

Plumbing will be designed so as the supply line will flow back into the well when the pump is turned off and the overflow will drain as well.

Backfill:

a. The initial backfill shall be select material, placed and compacted around and above the pipe to the specified depth and density, taking care not to displace or damage the conduit or its protective coating.

b. The final backfill shall be the material from the trench excavation and shall be compacted to the density of the surrounding material.

c. Backfill material shall contain no frozen soil, sod, brush, roots, or other perishable material.

d. Rock fragments greater than 3 inches shall not be placed within 2 feet of the pipe.

Final Grading:

All disturbed areas shall be graded without surface depressions to blend with the surrounding area.

Tire Troughs:

The first tire trough will be set 50’ from the wellhead slightly upslope. The second tire trough will be set 16’ edge to edge from the first trough and slightly upslope. The supply line from the well will feed into the second tire trough with the overflow flowing into the first trough. A float will be installed in the first trough. The supply line will be determined by the pump design while the overflow lines will be 2” minimum. A bird escape ramp shall be included in the construction design and installed in each tire trough.

Fencing:

A triangular barricade will be installed around each tire trough (see spec sheet ND_DWG_107). A fence will be built around the well head and solar panels with enough room for a person to walk in between the solar panels, well and fence. The fence will consist of 4”-6” wooden posts spaced every 8’. Wooden posts will be pressure treated and buried at least 28” with at least 50” above surface. Wooden posts will be tamped in to stabilize the posts. Feedlot Panels with 4 ga. Wire and 50” tall will be placed around the boundary of the wooden posts and fence stapled in. Where the feedlot panel contacts a wooden post at least 3 fence galvanized barbed staples will be used (staples at least 1.75 inches). A 2”x10” rough-cut board will be placed on the outside of the fence panels with the bottom of the board ~20” above the ground.

Boards can be staggered. The boards will be nailed or screwed into each wooden post twice on each end. Nails or screws must be long enough to securely hold the board in place.

Safety:

The contractor is responsible for compliance with all state and local laws, ordinances, codes, and/or regulations applicable for the installation. The technical representative will document any safety violations witnessed.

Acceptance:

Acceptance of the project will be performed by the technical representative during construction and after the work has been completed. If deficiencies are found the contractor will be notified by the technical representative verbally or in writing and the corrective action necessary in order to accept the project.

Submittals:

• Prospective bids will include submittals of the design specifications for the solar pumping system. The specifications will include the pump curve, solar panel specifications, and solar rack specs plus any other pertinent information needed to assess the proper function of the design.

• Prospective bids will submit a drilling plan which will include equipment, drill bit, type of drilling, ie mud or air, schedule and any other pertinent information needed to assess the proper function of the design.

• Prospective bids will include a list of all materials that will be used in the design, ie type of pipe, wiring, valves, solar panels, etc.

• Prospective bids will include the design of the tire troughs and associated equipment. Designs will be considered if different than what has been described in this document.

• The contract can start after July 31st due to wildlife stipulations. The prospective bid will include an expected start date and timeframe of the project.

Note on Spec. Sheets” Spec. sheets are generalized, and the Ellis Trust 2 Water well uses a combination of designs from each sheet.

614-02 Gravel apron shows 4’ of gravel out from edge of tire tank. This contract calls for 8’ of gravel. The 6” diameter stem housing on the supply line is not needed. The supply line in the tire tank with float valve outlet will be installed above the max. water level to prevent water in the tire tank to flow back down the well.

ND_DWG_107

This spec sheet shows the tank guard plan view. The gravel drainfill will need to be installed as described in the spec sheet.

MATERIAL SPECIFICATION

MS-206:

“PLASTIC PIPE”

206.1 SCOPE

This specification governs the quality of plastic pipe and fittings.

206.2 QUALITY

The pipe shall conform to American Society of Testing Material Specification (ASTM) for the manufacture of this pipe.

Material SDR1 SCH 40 & 80 PIP2

NRCS or ASTM ASTM NRCS

Acrylonitrile-Butadiene- Styrene, ABS

D-2282

430-DD

430EE

D-1527 430-DD

430-EE

Polyethylene, PE D-2239 D-3035

430-DD

430-EE

D-2104 D-2247

Polyvinyl Chloride, PVC D-2241

430-DD

430-EE

D-1785 430-DD

*For pipelines conveying potable water, the material also requires approval of the National Sanitary Foundation, NSF.

1 SDR, Standard Dimension Ratio 2 PIP, Plastic Irrigation Pipe

206.3 FITTINGS

The fittings shall be of a material, size and pressure rating compatible with the pipe materials and withstand a working pressure equal to or greater than the pipe.

206.4 JOINTS

a. Solvent welding of joints shall be in accordance with the recommendation of the pipe manufacturer.

b. Rubber gasket joints and the gasket material shall conform to ASTM D-3139.

c. All joints and connections shall withstand a working pressure equal to or greater than the pipe.

Ellis Trust 2

Prepared by Shane Evans, CFO Hydrologist

January 14, 2013 (edited May 15, 2020) Proposed Well Location

T. 38N R. 82W Sec. 30 SENW Elevation 5,380’

Geohydrology of the Area

The proposed location is off of the 33 Mile Stock Driveway, Country Road 110. Rocks at the surface range are the Cretaceous aged Cody Shale. Underlying the Cody Shale is the Frontier formation which would be the target formation for water. The Cody Shale and Frontier formation make up part of the marine and continental rock unit which is predominantly a marine unit. The sandstones of the Frontier formation differ in the amount of shale partings and matrix and may range from a single massive sandstone to several sandstones inter-bedded with shales. The elevation of the proposed location is approximately 5,380’. The proposed location is within the Casper Arch and just to the west of the Powder River Basin. Ground-water resources of Natrona County, Wyoming (USGS WSP-1987) has an adequate geologic map and description of the geohydrology of the proposed well site area.

Existing Wells, Springs, and Streams

The South Fork of the Powder River is approximately 2 mile to the north. The well site is 3 miles to the northwest of Cloud Creek. Cloud Creek is an intermittent drainage while South Fork Powder River is perennial and intermittent in places. No springs are near the proposed location. 6 water wells are within 4 miles of the proposed location. The water wells are to the northwest and to the northeast of the proposed location. All of the wells are completed in the frontier formation and range from 2 g.p.m to 15 g.p.m and several are flowing wells. Geologic records from oil wells were also used in this investigation. Some of the oil wells had good geologic well logs.

Two recent wells (2018 and 2019) were drilled in section 19 and 20. The depth to water is approximately 340-350’ being pumped at 2 to 3 gpm. These wells were drilled into the Shannon member of the Cody Shale. The Shannon outcrops to the north along ridgetops.

Water-Supply Potential

Recharge, Discharge, Movement:

Principal recharge of the deeper aquifers is from basin margin outcrop zones, whereas shallower ones receive recharge from outcrop areas, infiltration and vertical leakage from adjacent aquifers.

Proposed Well Site: The water-supply potential of the proposed well site is average. Completing a well within the Shannon member of the Cody Shale would likely be successful. Wells completed in the Frontier formation generally yield around two to twelve gallons per minute in the area. The projected water level at this location is around 340 feet below land surface. The probability of completing a well producing 2 to 3 G.P.M at this location is .6. Water quality is considered to be good for livestock in this area. The frontier is likely greater than 3,000 BLS.

Recommendations If 2-3 gpm is adequate, then drill to a depth of 300 to 400 feet. If more than 3 gpm is desired than drilling a well is not recommended. Actual depth will depend on the thickness of saturated sand(s) or fractures penetrated and on actual desired yield.

Field Visit Access into the site will be off of a two track trail from county road 110. A reservoir is located next to the drilling location. Several reservoirs along the stock driveway might be available for using water for drilling. Casper would be the closest source for obtaining water for use in drilling.

Additional drilling constraints include:

1. If an adequate water-supply zone is encountered before total depth is reached, test zone for water quality before completing (Ph and Electrical conductivity).

2. When TD is reached, test water quality before completing well (Ph and electrical conductivity).

3. For depths over 1,000 feet steel casing and screen will need to be utilized.

4. All wells will be drilled and cased according to Wyoming State Engineers Office, Water

Well Minimum Construction Standards.

The well should be drilled, completed and developed according to BLM standards. Samples of well-cuttings should be collected and identified at 10-foot intervals. The well drilling, completion and development should be supervised by an experienced hydrologist.

References

Christ, M.A. and Lowry, M.E., 1972, Ground Water Resources of Natrona County Wyoming: U.S. Geological Survey Water Supply Paper, WSP-1897.

DIVISION 1 SECTION 01009

GENERAL REQUIREMENTS GENERAL INFORMATION AND REQUIREMENTS

Rev. 05-91

PART VI - SPECIFICATIONS

DIVISION 1 SECTION

01009

GENERAL REQUIREMENTS GENERAL INFORMATION AND

REQUIREMENTS

Rev. 05-91

PART 1: GENERAL

1.01 SUMMARY:

A. Description of Work: Furnishing all labor, equipment, supplies, and materials, to drill, construct, equip and develop one water well.

B. Location: Work under this Contract is located in Natrona County Wyoming.

The work location is shown on the drawing and listed on the Work Data Sheet.

C. Work Data Sheet: Designates the type and quantity of work required at the project location, and dimensions required for typical well construction.

1.02 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:

ASTM American Society for Testing and Materials

1916 Race Street Philadelphia, PA 19103

AWWA American Water Works Association

6666 West Quincy Avenue Denver, CO 80235

OSHA Occupational Safety and Health Administration's Standards

U.S. Department of Labor Occupational Safety and Health Administration Denver Area Office 333 West Colfax Avenue Denver, CO 80204

PCA Portland Cement Association

5420 Old Orchard Road Skokie, Il 60076

API American Petroleum Institute

1220 L Street Washington, DC 20005

Rev. 05-91

AWS American Welding Society, Inc.

P.O. Box 351040 Miami, FL 33135

1.03 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 form of the Certificate of Conformance provided by the supplier shall be as follows:

1. The certificate shall state that the named product conforms to the Contract requirements.

2. The certificate shall 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. The certificate shall provide the name and address of the manufacturer, the testing agency and the date of tests.

4. The certificate shall set forth the means of identification which will permit field determination of the product delivered as being the product covered by the certification.

1.04 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.

B. Conflict: Where a conflict occurs between reference documents and project specifications, the project specifications shall govern.

1.05 DELIVERY, STORAGE, AND HANDLING:

A. Delivery: The Contractor shall protect products incorporated into the work from damage while in transit to the site. Products must be delivered in original unopened containers with manufacturer's name, brand designation, and contents legibly indicated.

B. Storage: The Contractor shall provide temporary storage facilities for products. Storage shall comply with the manufacturer's instructions.

The storage area shall permit access for inspection and handling.

C. Handling: The Contractor shall load and unload products in such a manner that protects them from damage until installation on the project.

1.06 PROJECT/SITE CONDITIONS:

A. Access to the Work:

1. Access to work shall be provided by and at the Contractor's expense.

2. Public or private access roads damaged by the Contractor shall be restored at the Contractor's expense and to the same condition as they were at the commencement of work.

3. Construction of access roads to the work will not be permitted.

Access to the work shall be by existing roads and trails unless prior authorization from the approving official.

B. Environmental Considerations:

1. The Contractor shall exercise care to prevent unnecessary surface disturbance of the work areas.

2. The Contractor shall not travel cross-country when ground is wet enough to cause rutting.

1.07 SEQUENCING AND SCHEDULING:

A. Work Schedule: The schedule shall be submitted at the pre-work conference. When requested, the Contractor shall submit an updated schedule within 3 calendar days.

PART 2: PRODUCTS

(There are no applicable requirements.)

PART 3: EXECUTION

3.01 PROJECT MEETINGS:

A. Pre-Work Conference:

1. Notification: A pre-work conference 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 drawings and specifications, construction schedules, payroll and payments, required forms/format for recording drilling and logging information, and administrative provisions of the Contract.

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

3. Presentation: The Contractor shall be prepared to summarize and explain procedures planned for the project.

B. Progress Meetings:

1. Location: Meetings shall be held at the project site, or as determined by the Contracting Officer.

2. Notification: Meetings may be called by either the Contracting Officer or the Contractor. Request shall state who should attend and include agenda.

C. Final Inspection:

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

2. The Contractor shall notify the Contracting Officer in writing at least three working days before the completion date so the Government can schedule final inspection.

3. The Contractor shall require the superintendent to be present during this inspection.

3.02 WORK LAYOUT:

A. Requirements: The Government will set a stake to give the Contractor the well location.

PART 4: MEASUREMENT AND PAYMENT

4.01 METHOD OF MEASUREMENT:

A. Units: The work described in this section will not be measured for payment.

4.02 BASIS OF PAYMENT:

A. Payment: No direct payment for the work described under this section will be made. The Contractor shall include consideration for this item in the bid price for other items of the Contract.

END OF SECTION

DIVISION 2 SECTION WY-02674

SITEWORK WELL DRILLING AND CASING

Rev. 06-90

DIVISION 2 SECTION WY-02674

SITEWORK WELL DRILLING AND CASING

Rev. 06-90

PART 1: GENERAL

1.01 SUMMARY:

A. Section Includes: Drilling, testing, developing, record keeping, abandonment of water well, disinfection, and installing Contractor-furnished and Government-furnished property.

1.02 RELATED WORK:

A. Specifications Sections:

General Information and Requirements Section 01009 Government-furnished Property Section 01019

1.03 REFERENCES:

A. American Society for Testing and Materials:

ASTM A53/A53M-05 Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

ASTM A589-96(2001) Standard Specification for Seamless and Welded Carbon Steel Water-Well Pipe

ASTM C1019-05 Standard Test Methods for Sampling and Testing Grout ASTM D1785-05 Standard Specification for Poly(Vinyl Chloride) (PVC)

Plastic Pipe, Schedules 40, 80, and 120 ASTM D2241-05 Standard Specification for Poly(Vinyl Chloride) (PVC)

Pressure-Rated Pipe (SDR Series) ASTM D2464-99e1 Standard Specification for Threaded Poly(Vinyl

Chloride) (PVC) Plastic Pipe Fittings, Schedule 80 ASTM D2466-05 Standard Specification for Poly(Vinyl Chloride) (PVC)

Plastic Pipe Fittings, Schedule 40 ASTM D2467-05 Standard Specification for Poly(Vinyl Chloride) (PVC)

Plastic Pipe Fittings, Schedule 80 ASTM D2564-04 Standard Specification for Solvent Cements for

Poly(Vinyl Chloride) (PVC) Plastic Piping Systems ASTM D2855-96(2002) Standard Practice for Making Solvent-Cemented Joints with Poly(Vinyl Chloride) (PVC) Pipe and Fittings ASTM D5716-95(2000) Standard Method for Measuring Rate of Well Discharge by Circular Orifice Weir ASTM D5737-95(2000) Standard Guide for Methods for Measuring Well

Discharge ASTM F480-02 Standard Specification for Thermoplastic Well Casing

Pipe and Couplings Made in Standard Dimension Ratios (SDR), SCH 40 and SCH 80

ASTM F656-02 Standard Specification for Primers for Use in Solvent Cement Joints of Poly(Vinyl Chloride) (PVC) Plastic Pipe and Fittings

1.04 SUBMITTALS:

Rev. 06-90

A. Certification: Furnish written certification from the manufacturer certifying that the Contractor-furnished property conforms to the requirements of this section. Submittals shall be in accordance with Section 01009-General Information and Requirements.

B. Records: Final well logs, drilling samples, and well completion report shall be furnished to the Contracting Officer upon completion of the well.

1.05 PROJECT CONDITIONS:

A. Well Depths and Material Quantities: Well depths and material quantities listed in the Work Data Sheet are estimates. The final determination of depths and material quantities will be made in the field by the Contracting Officer and will depend on actual geological conditions encountered during the drilling operations. The Contracting Officer will have the option of ordering abandonment of a well at any point during the drilling operation. Well abandonment shall be in accordance with these specifications.

B. Moving Equipment Between Wells: Moving equipment between wells includes work of moving equipment, materials, and tools, and setting up at each well site; removing equipment, tools, and materials; and moving them to the next well site.

C. Rig and Standby Time: No rig or standby time will be paid for in this

Contract.

1.06 SCHEDULING:

A. Drilling Program: At the Prework Conference, the Contractor shall submit to the Contracting Officer for approval 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. The days of the week and month that work is to be performed.

2. 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.

3. Type and specifications of rig including description of air package and mud pump.

4. Drilling methodology (air rotary, mud rotary, reverse circulation, etc), bit types & sizes, etc.

4. Plan for disposal of waste.

5. Sequence of drilling operations.

6. Mud program (list of additives, mixing rate) if applicable.

Rev. 06-90

PART 2: PRODUCTS

2.01 GOVERNMENT-FURNISHED MATERIALS

A. See Section 01019, Government-Furnished Property.

2.02 CONTRACTOR-FURNISHED MATERIALS

A. Casing: If the contractor deems it necessary or desirable to use temporary casing, the casing may be used, subject to the approval of the

B. Bentonite: Granular bentonite shall be American Colloid KWK, CS/55 or approved equal. Pellet bentonite shall be American Colloid Vol-Clay or approved equal.

C. Drilling Fluid Additive: A sodium or ammonium base, biodegradable foaming agent ("High Foam" or an approved equal) will be allowed for air-rotary drilling. Other additives (i.e. Drispac Plus, Alcomer 123L, etc.) must be submitted with the drilling plan and approved by the

D. Gravel Packing: The gravel-pack material shall be clean, with well-rounded grains that are smooth and uniform. The material shall consist of a minimum of 95% siliceous particles, with a maximum of 5% calcareous material. 100% of the gravel-pack material (by dry weight) shall pass the U.S. Standard Size No. 10 sieve, of which not more than 2% shall pass the size No. 20 sieve. This size of material is commonly referred to as 10/20 sand.

E. Formation Stabilizer: Well casing shall be sealed to prevent vertical movement or leakage of fluid in the annular space between casing and borehole wall. Non-Slurry bentonite grouts must be in place before significant hydration occurs. Plans for well construction shall include allowances for maximum effective emplacement of grout as a seal to protect the source aquifer and/or assure structural integrity of the entire cased well. Well cuttings are not allowed to be used as grout, filler, or aggregate material for well sealing. Selection of grouting material shall meet the technical requirements for making a proper seal.

Grout products shall meet applicable ASTM, API, NSF, AWWA, or other recognized industry standards. Grout shall be prepared according to manufacturer’s directions and shall be mixed as engineered for specific site requirements. Water wells permitted under the DEQ-WQD may alternately use any grout mixture specified by DEQ-WQD. For all other wells, the following are approved grout materials:

(i)Neat Cement Grout Slurry must consist of a mixture of Portland

Cement and not more than 6 gallons of clean water per bag (1 cubic foot or 94 pounds) of cement.

(ii)Sand Cement Grout Slurry must consist of a mixture of Portland Cement, sand, and water in the proportion of not more than 1 part by weight of sand to 1 part of cement with not more than 6 gallons of clean water per bag of cement(1 cubic foot or 94 pounds).

(iii)Concrete Grout Slurry must consist of a mixture of Portland Cement, sand and gravel aggregate, and water in the proportion of at least 1 part by weight of aggregate to 1 part of cement with not more than 6 gallons of clean water per bag of cement.

(iv) Nonslurry Bentonite Grout must consist of chipped or pelletized bentonite varieties that are hydrated to manufacturer’s specifications.

(v) Cement/Bentonite Grout Slurry must consist of a mixture of cement and bentonite in the proportion of not more than 6.5 gallons of water and 3 to 5 pounds of powdered bentonite per 94-pound sack of Portland cement.

(vi) Bentonite Grout Slurry means an inorganic mixture of a minimum 20% by weight solids bentonite, with polymers, water, or other additives for the yield/rate control, which forms a low permeability seal (not greater than 1 x 10-7 cm/sec), and is mixed to the manufacturer’s specifications.

(vii) Cement Grout Mix: Shall be Type II Portland cement, sand, and a maximum of 2% calcium chloride.

(viii) Calcium Hypochlorite: Shall be used as the disinfectant for well bore, casing, screen, gravel packing and formation stabilizer.

(x) Water used for drilling and cementing operations shall be potable water or from a source approved by the Contracting Officer.

2.03 EQUIPMENT:

A. Drilling Equipment: Except otherwise specified, the type of drilling equipment shall be determined by the driller.

B. Minimum Equipment: The Contractor shall furnish equipment of sufficient size and in sufficient quantities to drill 1-1/2 times the estimated drilling depth of the deepest well listed in the Work Data Sheet.

C. Air Volume Requirement: (Air-Rotary Drilling): Contractors intending to use air-rotary drilling equipment should be aware of the volume of air required to lift the drill cuttings from the bore hole under various conditions. The volume of air produced by an on-rig compressor, or in conjunction with auxiliary compressors shall be sufficient to lift drill cuttings to the ground surface for the size and estimated depth (up to

1.5 times the estimated depth) of the bore holes shown on the Work Data Sheet.

D. Enlarging Pilot Holes (Air-Rotary Drilling): When enlarging a pilot hole the Contractor shall use, in conjunction with the drill bit, either a "hole opener" device or a triple blade "stabilizer. The hole opener device shall be the same diameter as the bottom of the drill bit. The stabilizer shall be the same diameter as the hole-enlarging bit and shall extend a minimum of 18 inches above the top of the hole-enlarging drill bit. Other hole opening configurations must be approved by the

E. Well development (cable-tool drilling equipment): Solid or valved surge plunger. The drill tools or drill stem shall weigh a minimum of 1,200 pounds.

F. Well Development (Rotary Drilling Equipment): Four-nozzle jetting tool with nozzles spaced at 90 degrees. Minimum size shall be 3/16 inch diameter. The jetting tool and appurtenances shall deliver water at a minimum velocity of 150 feet per second and pressure of 150 pounds per square inch. Maximum pressure shall be limited to 300 pounds per square inch.

G. Well Testing (pumping method): Furnish and install a test pump of sufficient capacity to test the well at the rate of flow stated in the Work Data Sheet. Devices for measuring the flow of water, such as a calibrated weir box, an orifice, or a water meter shall be provided by the Contractor. Provide an air line with a gauge, hand pump, and check valve for measuring the water level in the well.

H. Well Testing (bailing Method): Furnish bailing equipment sufficient to achieve a yield equal to or greater than that specified in the Work Data Sheet, and to continue for at least one hour after the water level has become stable. The bailing device shall be a commercial type with a fixed volume.

I. Well Testing (air-lift Method): Furnish airlifting equipment sufficient to achieve a rate of flow equal to or greater than that specified in the Work Data Sheet, and to maintain this rate for at least one hour. Size and depth of well bore, drill pipe size, and compressor capacity must all be considered.

2.04 GROUT:

A. Cement Grout: Shall be Type IIA Portland Cement, water, sand and a maximum of 2% calcium chloride. Portland Cement shall meet the requirements of ASTM C150 and the calcium chloride shall meet the requirements of ASTM D98. Mixed Grout shall be one part Portland Cement and three parts sand mixed with no more than 6 gallons of water per 94 pound sack of cement to form a workable mix.

2.05 CEMENT FOR PLUGS AND CASING SEAL:

A. Cement: The cement slurry shall be API Class G, slurry weight 15.8 lbs.

per gallon (118 lbs. per cu. Ft.) mixed with not more than 5 gallons of water per 94 pound sack. The cement shall be in bulk with any additives blended at the bulk-cement facility. Additives may include 2% Calcium Chloride materials to help prevent circulation loss or additives determined necessary after the hole is drilled. The water shall be potable.

Rev. 06-90

PART 3: EXECUTION

3.01 PREPARATION:

A. Clearing: Worksite clearing shall be limited to an area 50 by 50 feet.

B. Site Preparation: Surface disturbance at the site shall be minimized.

However, the construction site may be leveled as necessary for drilling operations. Resultant cut or fill slopes shall not be steeper than 4:1, unless staked otherwise.

3.02 INSTALLATION:

A. Drilling Location: Drill the well at the location staked or otherwise designated by the Contracting Officer.

B. Hole Size: The finished hole size shall be not less than 9-1/2 inch for

5-inch nominal size casing (6 1/4-inch OD on couplers) and large enough to accommodate tremie pipe.

C. Estimated Drilling Depth: As shown on Work Data Sheet.

D. Using Pilot Hole as Test Well: If the Contractor drills a pilot hole and encounters water, the Contracting Officer, after considering all the evidence, shall determine whether to deepen the hole, enlarge the hole to the size specified, or to abandon the well. The pilot hole shall be a minimum of 5 inches in diameter.

E. Hole Cleanliness (Rotary Drilling): The drilled hole shall be kept clean to prevent plugging off of small yields of water. Sufficient drilling fluid (whether it is compressed air and water-diluted foaming agent or approved water based mud) shall be circulated in the well bore to prevent cuttings from booting or caking the walls of the hole. The use of water for air-rotary drilling operations shall be only for diluting the foaming agents. Drilling with non-foamed water and air will not be permitted.

Circulation shall be established as soon as drilling begins, and shall be maintained throughout the drilling process. The return of cuttings to the ground surface shall be continuous. When drilling stops, circulation shall be maintained until all cuttings have been returned to the ground surface. Failure to maintain a clean hole shall be sufficient cause to abandon the hole due to Contractor's actions.

F. Water Used to Facilitate Completion of Well: Any water introduced into a well by the Contractor to facilitate drilling, developing, cleaning and gravel packing operations, including water added to an approved drilling additive shall be potable water or from a supply approved by the

G. Drilling Fluid Additives: The Contractor shall not use drilling fluid additives, unless they have been approved in writing by the Contracting Officer. Submit manufacturers’ literature describing the additives, including product properties and manufacturer's recommended mixing and application methods. Approved foaming agents (when used) shall be diluted with an amount of water which will provide a foam solution that after it has been injected into the well and returns to the ground surface with the drill cuttings, shall be about the consistency of brush-on-shaving lather or thicker.

H. Recirculation and Mud Drilling: Bentonite based mud drilling shall not be permitted. Polymer based mud drilling programs must be approved by the Contracting Officer.

I. Depth of Casing: 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 well is not cased to the full depth, the Contract will be modified in writing.

J. Backfill: If in the process of locating water-bearing strata, the well was drilled deeper than needed, the Contractor shall back fill the well with formation stabilizer to a point 10 feet below the bottom of the lowest water-bearing strata. Back fill shall be disinfected in the same manner as the gravel pack.

K. Casing Installation: 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.

1. Casing joints shall be watertight.

L. Water-Bearing Strata: If it is necessary to extend casing through developable water-bearing zones, the portion of the casing opposite the water bearing zones shall be screened or sealed off as determined in the field by the Contracting Officer.

1. Casing centralizers shall be installed on the casing immediately above and below the screened zone, and every 40 feet on the steel casing.

M. Casing at the Wellhead: Casing shall extend above the natural ground level 18 inches.

N. Stainless Steel Well Screen: The Contractor shall select the installation method, in accordance with the screen manufacturer's recommendations, which will be furnished to the Contractor by the Government. Screens will have pipe-thread end fittings. The screen fittings shall be stainless steel of the same type as the screen. Joints must be straight and tight and retain 100% of the original screen strength.

P. Gravel Packing: Install approximately a 2-inch thickness (minimum) of gravel pack material in the annular space in the zones opposite the screens up to 5 foot 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

1. Disinfection: Disinfect the gravel pack material by mixing 1 pound of calcium hypochlorite (65% available chlorine) in each cubic yard of packing material as it is installed in the well.

2. 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 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.

Q. 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 disinfected and installed in the same manner as the gravel packing. Installation of the seal shall be performed in the presence of the Contracting Officer.

R. Zone Isolation Seal: If water yielding zones are encountered that contain unacceptable quality water, these zones will be sealed off with bentonite. Install bentonite grout, gravel or pellet material for a thickness of ten feet directly above and below the zone to be isolated.

S. 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 disinfected and installed in the same manner as the gravel packing. Installation of the formation stabilizer shall be performed in the presence of the Contracting Officer.

T. If well is cased to surface with PVC casing, a protective sleeve will be installed prior to or in conjunction with the surface grouting. The sleeve shall consist of steel casing at least 3 nominal pipe sizes larger than well casing (8” minimum for 5” casing, etc.), extend at least 18 inches above the ground surface (just below the top of the casing), and at least 5 feet below ground surface (or to the level of the pitless adapter).

3.03 FIELD QUALITY CONTROL:

A. Alignment:

1. The well shall be drilled vertically.

2. After casing has been installed, test the alignment by using a

20-foot piece of pipe with an outside diameter of not more than one inch smaller than the inside diameter of the casing. The testing pipe shall pass through the permanent casing without catching or binding.

3. If the well does not pass the alignment test, correct the alignment or abandon the well and drill a new well within 10 feet of the original hole, at no additional cost to the Government. The Contractor shall completely fill in the old hole with bentonite in accordance with state law, prior to starting a new hole.

3.04 WELL DEVELOPMENT:

A. General: After a well has been completely constructed and all drilling fluids and additives removed from the well, each exposed water-bearing zone targeted for water production shall be developed. Development work shall be performed in the presence of the Contracting Officer.

B. Surging and Bailing Method (Utilizing Bailer): The development process shall include surging and bailing the well. Surging shall be accomplished by utilizing the bailer as a surging device. Development shall start at the bottom of the well and proceed upwards through all zones to be developed. On completion of development, bailing shall be performed from the bottom of the well to remove accumulated sand or other fines and continue until the well yields clear, sand free water.

C. Air Development Method (Single-Pipe System open to Atmosphere):

Development shall be done by using a single-pipe air pumping system using the casing as the conductor line. The compressors, air line hoses, and fittings shall be of adequate size to pump the well by the air lift principle at 1-1/2 to 2 times the desired minimum yield rate specified in the Work Data Sheet. The Contractor shall initially pump the well with air until the well is developed to the point that it yields clear sand-free water. The air shall then be shut off and the water in the well allowed to recover. The air valve shall be opened to reintroduce air into the well until water is again brought to the surface by the air lift, at which time the air valve shall be closed to allow the water to drop back down the well and recover. The column of water shall then be continuously pumped with air until it again yields clear sand-free water.

The Contractor shall repeat the above operations until the well no longer produces fine material when it is surged and backwashed. The bottom of the air line shall be placed at different levels to facilitate development of intake areas and multiple water producing zones, and the process repeated until the aquifers yield sand-free water when surged and backwashed. Upon completion of development, pumping shall be performed at the bottom of the well to remove accumulated sand or other fines.

3.05 PROTECTION:

A. Drilling Waste: 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. Drill cuttings shall be scattered so that the material is 1-inch or less in depth.

3.06 WELL LOG AND SAMPLES:

A. Well Log: The Contractor and/or the Contracting Officer will record drilling and logging information in the format and/or on the forms agreed to at the prework conference. The well log shall meet the state requirements and include entries for the formation and each apparent change in material penetrated, or every 10 feet, whichever is lesser.

The log of the well shall show material penetrated and full descriptive notes made of each stratum found by the drill and difficulties or any usual 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 drilling operations and after completion of drilling.

B. Logging: The Contractor shall collect samples of well-cuttings at ten-foot intervals and, as per the Contracting Officers instructions, place them in an orderly fashion on the ground near the drill site where they can be reviewed throughout the drilling process or placed in sample bags.

The sample bags shall be marked showing the depth at which the samples were collected and the date and time that the samples were collected.

Geophysical wireline logging may also be required. The determination to run geophysical logs will be made during the drilling process by the Contracting Officer. Contractors should assume that the logs will be required on all wells. Wireline logs to be run include gamma-ray, spontaneous-potential, and shallow-deep resistivity log.

1. For cable tool drilling operations, take a sample at the end of each drilling run.

2. For air-rotary and other types of drilling operations, take a cutting sample every 10 feet.

C. Additional Requirements: The Contractor and/or the Contracting Officer will complete a report on the completion of the well to include information supplementary to the well log. This can be submitted on a form 7240-1, Record of Wells (as supplied by the Contracting Officer), or in a format approved at the prework conference. The Contractor shall provide the Contracting Officer the information necessary to complete the report or will submit this report to the Contracting Officer.

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