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STATEMENT OF WORK

WELL CONSTRUCTION

SHAWANGUNK GRASSLANDS NATIONAL WILDLIFE REFUGE (NWR)

ULSTER COUNTY, NEW YORK

PART 1 - GENERAL

1.01 SCOPE

A. The work of this section consists of drilling, developing, and testing a new 6 inch diameter artesian water supply well.

B. The new well shall be capable of delivering a desired safe yield of 10 gallons per minute of potable drinking water. The estimated depth of the new well is 200 feet.

The well will be used for supplying water for agricultural purposes (herbicide mixing and washing equipment) and will eventually serve as the water supply for a small office building with a kitchenette and full bath.

The well will be used by Refuge personnel and not for direct public use.

C. The 200 foot depth is an estimate only and the Government reserves the right to increase or decrease the depth of the well under a modification to the contract if field conditions require this.

D. The well shall be drilled and sealed case to 40' or bedrock, A pitless adapter shall be installed on case and capped on the outside, a submersible pump installed (plumbed to pitless adapter and wired to top of casing), and well top cap installed on the casing. The refuge facility will run the lateral water line from the well house, and power wire from the well house to the well and install the captive air tank in the future.

1.02 SITE VISIT

A. Site visit is scheduled June 21, 2022 9:00am at

Shawangunk Grasslands NWR

902 Hoagerburgh Road

Wallkill, NY 12589

1.03 PERMITS

A. The Contractor shall obtain and pay for all the required water well construction permits from the local health department or the New York State Department of Health. A local permit is required in some counties. The contractor has to be registered with the New

York State Department of Environmental Conservation.

There are no known hazardous materials at this site.

1.04 QUALITY ASSURANCE

A. Perform work in accordance with the State of New York Department of Health

Regulations, and the American National Standards Institute/American Water Works

Association, Water Wells.

1.05 SUBMITTALS

A. Submit Manufacturer's data with application and installation instructions for all the well components.

B. Submit Construction Methods and Materials descriptions on well construction, developing and testing.

C. Product Data: Submit manufacturer's product data covering description of pitless adapter, pump, standard details and installation recommendations.

1.06 PROJECT SAFETY

A. The Contractor shall be responsible for strict compliance with all provisions of the

Occupational Safety and Health Administration (OSHA) requirements 29 CFR 1910 and

29CFR 1926 during the performance of the work.

PART 2 - PIPING

2.01 WELL CASING

A. Material - 6" inner diameter (6 5/8” outer diameter steel pipe which is threaded with a steel coupling, conforming to American Society for Testing and Materials or approved equal. The casing will have a drive shoe at the bottom and will be grouted in place with neat cement. The estimated depth of the new well is 200 feet, with grout to at least 40’ or bedrock.

B. Casing and joints shall be watertight.

2.02 WELL SCREEN

A. Should unconsolidated water bearing strata be found, Contractor shall set a well screen as specified below.

B. Screen shall be of the continuous slot, factory wound type made by wrapping V-shaped

PVC wire around a system of vertical ribs. Each joint between horizontal wires and vertical ribs shall be solvent welded. All necessary fittings shall be provided.

C. Material shall be National Sanitation Foundation (NSF) approved plastic.

D. Length shall be determined and agreed upon between the Government and the

Contractor.

E. Contractor shall assume responsibility for selection of proper size screen openings.

Screens shall be selected so that the full capacity of the well will be transmitted through the slot openings at a maximum calculated average entrance velocity of 0.1 feet per second. Screen slot size shall be determined by a soil sieve analysis. A fitting shall be provided to close the bottom of the screen. Details or catalog cuts of the screen to be used shall be submitted to the Government for approval prior to installation.

2.03 PITLESS ADAPTER

A. Description: Standard pitless case, watertight cap, 4 1/2" plain spool with neoprene "0" ring seals and dresser type coupling suitable for connection to the 4 1/2" PVC pipe casing. Unit shall comply with all Federal standards and regulations, and ASTM A 53 standards.

2.04 WELL PUMP

A. Capacity: 600 GPH at 60 pounds per square inch pressure.

B. Type of Pump: Submersible, designed for installation within a 4 ½ " well casing.

C. Motor: One half HP minimum designed to operate on single phase, 60 HZ A.C. Motor shall be a three wire design with built in lightning protection, and built in auto-reset thermal overload protection in the motor. Wire pump into in accordance with electrical requirements as specified and as described in the manufacturers instructions.

D. Drop pipe size shall be as recommended by the submersible pump manufacturer.

PART 3 - WATER WELL INSTALLATION

3.01 DRILLING WELL

A. Drill the well in compliance with local, State, and Federal requirements or recommendations. Use suitable drilling equipment to drill hole and install materials.

Locate any drilling fluid pits that may be required at least six feet from the top of the well. Contractor shall dispose of drilling fluid, cuttings, and discharged water.

Any leftover soil can be left on site if it is graded out and seeded with a seed mix approved by the Refuge.

B. Provide and install pitless adapter, pump, drop pipe, wiring and accessories in accordance with manufacturer's instructions.

C. Well Identification Tag: The well driller, immediately after completion of the well, shall attach to the well the identification tag furnished by the Approving Authority. This tag shall be fastened to the well casing approximately 6 inches above finished grade by means of a 1/2 inch stainless steel band or other strapping device approved by the

Approving Authority. Devices which use a screw-type tightening mechanism are not acceptable.

3.02 DEVELOPING AND TESTING

A. The well shall be developed by an acceptable method the approved by the Contracting

Officer, in a manner that will not cause undue settlement and disturbance of the strata above the water bearing formation, nor disturb the seal around the well casing.

Development shall continue until water pumped from the well at the maximum test pumping rate is clear and free from sand. After developing, Contractor shall remove any formation materials brought into the well by the development process.

3.03 TESTING THE WELL

A. The well shall be tested by pumping to determine the yield and drawdown. Use a test pump of approximate capacity of 10 GPM. Test for two hours after the pumping water level reaches stability.

3.04 DISINFECTING THE WELL

A. The well shall be disinfected after the well has been tested for yield but before the test pump has been removed from the well and before collecting any samples for determining microbiological quality.

B. Disinfect well by introducing a chlorine solution into the well in such a manner that a concentration of at least 50 PPM of available chlorine exists in all parts of the well at static conditions. The chlorine solution will be introduced into the well in such a manner that the well surface above the static level will be completely flushed with the solution.

A minimum of 2 hours contact time shall be provided before pumping the well to waste.

3.05 CAPPING THE WELL

A. During well construction, temporarily cap well in such manner as to prevent any pollutants from entering the well.

3.06 WELL LOG

A. Daily, log and record for the well all materials passed through and the depths at which the changes in the formations occur, together with such other information. Samples of the materials found in each stratum shall be taken at intervals of not more than five feet, preserved in receptacles furnished by the Contractor, plainly marked to show the well and the depth below the ground surface from which the sample was obtained. The log of the well shall show all material penetrated and full descriptive notes made of everything found by the drill and of all difficulties or unusual conditions met in drilling. All water-bearing strata shall be described in special details as to whether the material is loose, compact, its color and, if gravel, whether it is water worn or angular.

B. Upon completion of the well, the log shall be signed by the Contractor and submitted with the final report for the well.

3.07 FINAL REPORT - RECORDS

A. The Contractor shall provide the Contracting Officer with a water well completion report suitable for forwarding to the local health department or the State Of New York. The final report shall contain (at a minimum) the following information:

1. A well log record of the materials penetrated and the depth at which they were encountered.

2. A complete casing and screen location record showing lengths of casing and screen used and the locations of any packers, plugs, and seals.

3. All pumping test data including static water level, length of test, rate of discharge and all drawdown measurements.

4. Contractor shall submit water samples to a certified laboratory for chemical and microbiological analysis; the results of the analysis shall be sent to the

Government.

5. The following parameters shall be analyzed as a minimum, in addition to the requirements of the Environmental Protection Agency (EPA) drinking water regulations:

Coliform Bacteria (total)

Nitrate (total)

Nitrite (total)

Lead

Copper

6. The complete chemical water analysis shall include testing for all contaminants per the Safe Drinking Water Act (SDWA) standards of the state of New York, if the standards are at a minimum as stringent as EPA's national standards.