J.1 Specifications.pdf

Meadow Creek Trailhead Well

MEADOW CREEK TRAILHEAD LIVESTOCK WATER WELL

LIST OF DRAWINGS AND TECHNICAL SPECIFICATIONS

LIST OF CONTRACT DRAWINGS

1 TITLE SHEET

2 SITE PLAN

3 WELL DETAILS

LIST OF TECHNICAL SPECIFICATIONS

DIVISION 1 – GENERAL REQUIREMENTS

SECTION 011000 SUMMARY OF WORK

SECTION 011400 WORK RESTRICTIONS

SECTION 012900 PAYMENT PROCEDURES

SECTION 012910 MOBILIZATION

SECTION 014100 REGULATORY REQUIREMENTS

SECTION 014200 REFERENCES

DIVISION 33 – UTILITIES

SECTION 332100 WATER SUPPLY WELLS

2 011000

DIVISION 1 – GENERAL REQUIREMENTS

SECTION 011000 SUMMARY OF WORK

PART 1 - GENERAL

1.1 SUMMARY

A. This project is located on the Flathead National Forest, Spotted Bear Ranger District, at the Meadow Creek Trailhead, approximately 68 miles South of Hungry Horse, MT.

B. Project Summary Description: The project includes but is not limited to the following major items of work as shown on the plans and specifications. The following descriptions are provided as an outline of major work items, and shall not be construed as all-inclusive or a complete listing of all items of Work under this Contract.

1. Installation of a new water supply well, at the location shown on the drawings, and as staked in the field by the Contracting Officer.

C. Government or Owner refers to the USDA Forest Service. Contracting Officer (CO) refers to the person assigned by the USDA Forest Service to administer the contract.

Soon after contract award, the Contracting Officer will designate a Contracting Officer’s Representative (COR).

1.2 GENERAL SITE CONDITIONS AND WEATHER

A. The elevation of the site is approximately 4,020 feet above mean sea level. The construction site experiences moderate snowfall and moderate to cold temperatures, with snow on the ground typically from November through May. The site is often inaccessible until June 1 due to snowpack.

1.3 USE OF PREMISES

A. General: Contractor shall have limited use of premises for construction operations, including use of Project Site, during construction period. Contractor's use of premises is limited by the Government's right to perform work at the site. Contractor shall at all times conduct his operations to ensure the least inconvenience to the public and employees.

B. Confine storage of materials to areas approved by the CO.

C. Contractor shall provide adequate signing and barricades and take necessary safety measures to protect the public during all construction operations. Contractor shall minimize disturbance of all undisturbed areas.

D. Preservation of Natural Features:

3 011000

1. Confine all operations to work limits of the project. Prevent damage to natural surroundings. Restore damaged areas at no additional expense to the Government.

2. Do not remove, injure, or destroy trees or other plants without prior approval.

Consult with CO and remove agreed-on roots and branches that interfere with construction.

3. Do not fasten ropes, cables, or guys to existing trees.

1.4 CAMPING

A. Camping will be allowed in close proximity to the project site in an area approved by the CO. Camping is restricted to the low impact (“Leave No Trace”) method in adherence with the wilderness ethic. Furthermore, all food and refuse shall be handled according to food storage requirements of Special Order No. LC00-18 to eliminate grizzly bear/human contact.

1.5 FIELD VERIFICATION

A. Field verify all new and existing dimensions affecting the work of this contract before ordering products

1.6 REQUIREMENTS OF THE OFFERER’S PROPOSAL

A. The Government Drawings and Specifications are the basis for this Contract.

B. The work shall conform to the Drawings as closely as possible. Those products listed in the Specifications are preferred products, chosen for compatibility, longevity, durability and quality. However, equal or better alternatives submitted by the Offeror will be considered.

1.7 PERMITTING

A. The Contractor shall be responsible for obtaining all permits and associated fees required to complete the project.

PART 2 - PRODUCTS (Not Used)

PART 3 - EXECUTION (Not Used)

END SECTION

4 011400

SECTION 011400 WORK RESTRICTIONS

PART 1 - GENERAL

1.1 USE OF PREMISES

A. Use of Site: Limit use of premises to work in areas indicated. Do not disturb portions of site beyond areas in which the Work is indicated. Assume full responsibility for the protection and safekeeping of materials and products stored on the site.

1. Limits: Confine construction operations to area designated by the Contracting Officer.

2. Government Occupancy: Allow for Government occupancy of site for use during periods of wildfire protection activities and other activities as requested by the Contracting Officer.

3. Roads and Entrances: Keep roads and entrances serving premises clear and available to the public, Government employees, and emergency vehicles at all times. Do not use these areas for parking or storage of materials.

1.2 OCCUPANCY REQUIREMENTS

A. Full Government Occupancy: Government (including outfitters and the public) will occupy site during entire construction period. Cooperate with Government during construction operations to minimize conflicts and facilitate Government usage. Perform the Work so as not to interfere with normal operations.

1.3 SCHEDULING

A. The Contractor shall coordinate scheduling and timing of required administrative procedures to avoid conflicts and insure orderly progress of the work. Proposed schedule shall be provided to the Contracting Officer 14 days prior to initiation of on-site work.

B. Schedule and conduct operations to minimize erosion of soils.

C. The Contractor’s schedule shall consider seasonal weather patterns for the project area. Any costs incurred by the Contractor due to weather delays shall be borne by the Contractor at no additional cost to the Government.

1.4 PROTECTION OF PUBLIC AND PROPERTY

A. Provide and maintain temporary barricades and warning signs to control access to protect the public and construction personnel from construction hazards.

B. Comply with Federal, State, and local laws, rules, and regulations concerning construction safety and health standards.

C. Repair damage to existing public and private improvements to original condition at no additional cost to the Government.

5 011400

1.5 WASTE DISPOSAL SITE

A. Remove all waste materials from the site on a regular basis. Do not dispose of any materials onsite by burial or burning.

B. Dispose of any hazardous waste, including treated wood, in accordance with State of Montana and federal regulations.

1.6 INTENT TO BEGIN WORK

A. After Notice to Proceed is issued and the Post-Award Conference, the Contractor shall notify the Contracting Officer of his/her intent to begin initial construction at least five days in advance.

PART 2 - PRODUCTS (NOT USED)

PART 3 - EXECUTION (NOT USED)

END OF SECTION

6 012900

SECTION 012900 PAYMENT PROCEDURES

1.1 SUMMARY

A. Measurement and payment for contract work will be made only for and under those pay items included in the Schedule of Items. All other work, labor, materials, equipment, and incidentals necessary to successfully complete the project will be considered as included in the payment for items shown. This section defines the method of measurements and basis of payment for work items listed in the Schedule of Items.

1.2 DETERMINATION OF QUANTITIES

A. Authorization from the Contracting Officer is required before exceeding quantities listed in the Schedule of Items. No payment will be made for work performed in excess of the quantities listed in the Schedule of Items unless otherwise authorized.

B. The following measurements and calculations shall be used to determine contract quantities for payment.

1. For items that are measured by the linear foot, such as pipe culverts, fencing, guardrail, piping, utilities, and underdrains, measurements shall be made parallel to the base or foundation upon which the structures are placed.

1.3 UNITS OF MEASUREMENT

A. Payment shall be by units defined and determined according to U.S. Standard measure and by the following:

1. Each (EA): One complete unit, which may consist of one or more parts.

2. Linear Foot (LF): Linear feet measured horizontally or vertically.

3. Lump Sum (LS): One complete unit, which may consist of one or more parts.

1.4 METHOD OF MEASUREMENT

A. One of the following methods of measurement for determining final payment is designated on the Schedule of Items for each pay item:

1. Actual Quantities (AQ) - These quantities are determined from actual measurements of completed work

2. Lump Sum Quantities (LSQ) - These quantities denote one complete unit of work as required by or described in the contract, including necessary materials, equipment, and labor to complete the job. They shall not be measured.

PART 2 - PRODUCTS(NOT APPLICABLE)

PART 3 - EXECUTION(NOT APPLICABLE)

7 012910

SECTION 012910 MOBILIZATION

1.1 SUMMARY

A. This item is intended to compensate the Contractor for operations including, but not limited to, those necessary for the movement of personnel, equipment, supplies, and incidentals to the project site; for payment of premiums for bonds and insurance for the project; and for any other work and operations which must be performed or costs that must be incurred incident to the initiation of meaningful work at the site and for which payment is not otherwise provided for under the contract.

1.2 MEASUREMENT AND PAYMENT

A. The measurement shall be lump sum for mobilization.

B. Payment:

1. Bond premiums will be reimbursed after receipt of the evidence of payment.

2. 50% of the lump sum, not to exceed 5% of the original contract amount, will be paid following completion of 5% of the original contract amount not including mobilization and bond premiums.

3. Payment of the remaining portion of the lump sum, up to 10% of the original contract amount, will be paid following completion of 10% of the original contract amount not including mobilization and bond premiums.

4. Any portion of the lump sum in excess of 10% of the original contract amount will be paid after final acceptance.

5. Progress payments for mobilization and preparatory work shall be subject to retainage.

PART 2 - PRODUCTS (NOT USED)

PART 3 - EXECUTION (NOT USED)

8 014100

SECTION 014100 REGULATORY REQUIREMENTS

1.1 DESIGN STANDARDS AND CODES

A. All work shall comply with the rules and regulations of federal, state, and local agencies having jurisdiction. The Contractor shall acquire all permits, licenses and approval needed to complete the project from applicable state and local officials.

B. The construction methods shall meet the latest edition of all national, state and local codes.

The following standards and codes are made part of the contract specifications. In case of conflict, the most stringent shall apply.

ACI American Concrete Institute AISC American Institute of Steel Construction ANSI American National Standards Institute ARM Administrative Rules of Montana ASTM American Society for Testing and Materials AWS American Welding Society AWWA American Water Works Association MDEQ Montana Department of Environmental Quality OSHA Occupational Safety and Health Administration (Department of Labor)

1.2 VARIATIONS WITH REFERENCES

A. Promptly notify the Contracting Officer of any observed conflict between Drawings and referenced standard or specification.

END SECTION

9 014200

SECTION 014200 REFERENCES

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including other Division 1 Specifications Sections, apply to this Section.

1.2 SPECIFICATION FORMAT AND CONTENT EXPLANATION

A. General Specification Format: These Specifications are organized into Divisions and Sections based on CSI MasterFormat 2004 Edition numbering system.

1.3 INDUSTRY STANDARDS

A. Applicability of Standards: Except where the Contract Documents include more stringent requirements, applicable construction industry standards have the same force and effect as if bound or copied directly into the Contract Documents to the extent referenced. Such standards are made a part of the Contract Documents by reference.

B. Publications Dates: Comply with the standards in effect as of the date of the Contract Documents.

C. Conflicting Requirements: Where compliance with 2 or more standards is specified and the standards establish different or conflicting requirements for minimum quantities or quality levels, comply with the most stringent requirement. Refer to the Contracting Officer before proceeding for a decision on requirements that are different, but apparently equal; and where it is uncertain which requirement is the most stringent.

1. Minimum Quantity or Quality Levels: The quantity or quality level shown or specified shall be the minimum acceptable. The actual installation may comply exactly with the minimum quantity or quality specified, or it may exceed the minimum within reasonable limits. To comply with these requirements, indicated numeric values are minimum or maximum, as appropriate, for the context of the requirements. Refer uncertainties to the Contracting Officer for a decision before proceeding.

D. Copies of Standards: Each entity engaged in construction on the Project is required to be familiar with industry standards applicable to its construction activity. Copies of applicable standards are not bound with the Contract Documents. Where copies of standards are needed to perform a required construction activity, the Contractor shall obtain copies directly from the publication source.

332100

DIVISION 33 – UTILITIES

SECTION 332100 WATER SUPPLY WELLS

PART 1 - GENERAL

1.1 SUMMARY DESCRIPTION

A. Summary. Work requirement in this Section includes the following:

1. Moving equipment to and from well site.

2. Drilling a new potable water supply well.

3. Provide and install well casing, and concrete grout or bentonite.

4. Temporary well cap.

5. Well development, testing, and disinfection.

6. Site clean-up.

B. The well to be drilled shall provide potable water. The proposed location for the new well is as shown on the drawings.

C. The well shall be completely cased to the bottom of the usable drill hole and sealed in accordance with ARM 36.21.654. Well construction will involve installation of a 10-inch nominal diameter surface casing to a minimum of 25 feet or five feet into competent bedrock.

Six-inch nominal diameter casing will be installed full depth of the drill hole. It is anticipated the total depth of the well will be 150 feet. However, the total depth is only an estimate and may vary significantly depending on conditions encountered during drilling. Well development, method to be agreed upon by the contractor and Contracting Officer will be performed prior to installation of the test pump. A surface seal consisting of cement grout will be placed in the annulus between the 10-inch surface casing and the permanent 6-inch well casing to the total depth of the annulus as the temporary 10-inch surface casing is removed.

Flowing well conditions are not expected; if encountered the well will be sealed in accordance with ARM 36.21.658.

D. The desired well yield is 20 gallons per minute or greater.

1.2 STATE CODES APPLY

Except where these specifications are more stringent, all aspects of Contractor's drilling, construction, and development of the well, and abandonment if ordered by the Contracting Officer, shall comply with State of Montana and local codes, including ARM 36.21.

1.3 SUBSURFACE INFORMATION

No information is available.

1.4 SUBMITTALS

A. The Contractor shall provide the following:

1. Submit copies of the State Well Driller's Report within 30 days of well completion.

Submit one copy to the CO and one to the State regulatory agencies.

a. The contractor/driller shall file the well log report (Form No. 603) with the

Ground Water Information Center (GWIC) of the Montana Bureau of Mines and Geology (MBMG) within 60 days of completing the well.

2. Contractor shall submit three copies of the pumping test to the Contracting Officer.

Results shall include static water level, yield, and drawdown.

3. Water Sample written results shall be submitted to the Contracting Officer.

4. Water disposal plan for disposal of water used for testing and disinfection.

1.5 JOB CONDITIONS

The Contractor shall protect work to limit siltation and contamination of adjacent terrain and surface water. The Contractor shall work to contain the drilling fluid, cuttings and compounds and provide a means to filter sediment from discharged water.

PART 2 - PRODUCTS

2.1 PERMANENT CASING

A. New black welded steel ASTM A53, Grade B; ASTM A120, Grade B and shall also conform to AWWA A-100 bearing factory markings of conformance.

1. The size, weight and wall thickness of the casing shall conform to the following:

SIZE ID WEIGHT WALL THICKNESS

(Inches) (Lbs. Per Ft.) (Minimum Inches) 6 18.97 0.280

2. Lengths of casing shall be 5 foot minimum.

3. Casing joints must be electric arc welded.

2.2 TEMPORARY CASING

Use new steel, used steel, or plastic at least two pipe sizes larger than the permanent casing, i.e. 6 inch permanent casing would require a 10 inch temporary casing. The casing will be removed as well grouting progresses and will remain the property of the contractor.

2.3 ACCESS PORT

Nongalvanized steel coupling with removable brass pipe plug; or Weldolet with brass plug by Bonney Forge Inc., Allenstown, PA.; or equal. Provide 1 1/2-inch diameter opening.

2.4 DRILLING WATER

Suitable for domestic consumption.

2.5 GROUT

A. Cement Grout: Type V Portland Cement, conforming to ASTM C150.

1. Mix: A maximum of 6 gallons of water per 94-pound sack of cement. Up to 2% (by weight) bentonite clay may be added in accordance with AWWA A100.

B. Bentonite Grout: NSF 60.

1. Mix: High-solids bentonite grout and water mixture with a minimum of 20 percent solids, mixed and placed according to manufacturer’s written instructions.

2. Conventional bentonite drilling clay and water mixtures will not be allowed.

C. Water: Suitable for domestic consumption.

2.6 DRILLING FLUIDS AND ADDITIVES

A. It is anticipated that the well will be drilled with air rotary methods. The drilling fluids in this case shall be compressed air containing a surfactant (foam), polymer, and/or bentonite gel injected into the compressed air stream. All drilling fluid additives must be approved by the National Sanitation Foundation (NSF) or similar ANSI accredited laboratory organization and shall be used as prescribed by the manufacturers of the products and in accordance with recognized industry standards and practices to ensure a workmanlike result.

2.6 WELL SCREEN

A. A well screen will not be required for this project.

2.7 CASING PERFORATIONS

A. Perforations below the lowest expected static water shall be completed as follows:

1. Perforate inner casing with a mills knife or star perforator. Alternatively, casing may be torch-cut, mill-slotted, sawed, or punched. Such inner casings may be of steel, plastic, or other suitable corrosion-resistant material, but if other than steel, a full evaluation of the structural stability of the inner casing must be made prior to its placement.

2.8 SANITARY WELL CAP FOR NEW WELL

A. Cap shall be vented, sanitary well seal, with holes for piping, electrical cables and well level measuring tube. Cap shall fit on top of casing, be constructed of steel or aluminum, and shall be vandal-resistant, removable, waterproof and vermin proof. Sized to fit casing and electrical conduit, meeting the requirements of MDEQ Circular DEQ-3 and ARM 36.21. Model WTC6 Watertight Cap by Campbell Manufacturing, Inc., or approved equal.

2.9 DEVELOPMENT AND DISINFECTION CHEMICALS

A. A chlorine compounds approved by Federal or local regulatory agencies shall be used as disinfectant for this project. The disinfectant shall be delivered to the site of the work in original closed containers. The quantity of chlorine used for disinfection shall be of 50 mg/l available chlorine in solution when mixed as listed in the chlorination table below. The solution shall contain enough chlorine to leave a residual of 25 parts per million throughout the well for a period of 24 hours.

Table 2. Chlorine Compound to Dose 100 Feet of Water-Filled Well at 50 mg/l.

Casing Diameter (inches)

Volume per 100 feet (gallons)

70% HTH Perchloron, etc. (dry weight)

25% Chloride of Lime

(dry weight)

5.25% Purex Clorox, etc., (liquid measure) 2 16.3 ¼ oz ½ oz 2 oz 4 65.3 1 oz 2 oz 9 oz 6 146.9 2 oz 4 oz 20 oz 8 261.1 3 oz 7 oz 2-1/8 pts 10 408.0 4 oz 11 oz 3-1/2 pts 12 587.5 6 oz 1 lb. 5 pts 16 1,044.5 10 oz 1-3/4 lbs. 1 gal 20 1,632.0 1 lb. 3 lbs. 1-2/3 gals 24 2,350.1 1½ lbs. 4 lbs. 2-1/3 gals

PART 3 - EXECUTION

3.1 WELL CONSTRUCTION

A. Construct well as shown on the drawings.

B. Install permanent casing. The method of placement of the casing shall be the contractor’s choice. Steel casing shall be equipped with a drive shoe in accordance with ARM 36.21.644 when driven.

1. Set casing and liners round, plumb, and true to line.

2. Remove scale, slag, dirt, and debris from inside and outside casing before installation.

3. Casing lengths shall be joined watertight by a method appropriate to the material used and the resulting joint shall have the same structural integrity as the casing itself. The contractor’s method shall be approved by the Contracting Officer.

4. Threaded steel casing will not be used for this project.

5. Plain End Steel Casing - Casing lengths shall be joined by full circumferential welds conforming to AWS standards. Welded collars may not be used.

6. All plastic casing shall be installed only in an oversized drill hole without driving. Plastic casing to be used must be specifically designed for water well construction and bear NSF approval. Plastic casing shall meet all of the requirements of ARM 36.21.645

7. Plastic casing joints shall be watertight. Solvent cemented joints shall be made in accordance with manufacturer’s directions.

C. Minimum Protected Depths

1. The wells shall have unperforated casing to a minimum depth of 25 feet from the ground surface. The wells shall not be constructed to draw water from a water table aquifer within 25 feet of the ground surface.

D. Top Terminal Height

1. The permanent casing heads shall extend not less than 24 inches above the finished ground surface. The ground surface immediately surrounding the top of the well casing shall be graded so as to drain surface water away from the well.

E. Sanitary Seal.

1. Casing shall be sealed with concrete grout. The minimum thickness of the seal shall be 1.5 inches between the casing and the borehole. The grout seal shall be placed to a depth of 25 feet below the ground surface. Installation of seals will be performed according to ARM

36.21.654 through 36.21.658.

a) Sealing operation shall be performed from the bottom of the space to be sealed to the surface in one continuous operation. The minimum sealing material thickness is

1.5 inches of sealing material around the outside of the casing on all sides.

2. Cement grout shall set in place 48 hours before additional drilling takes place, special additives may be mixed with the sealing material that cause it to set in a shorter period.

3. When casing diameter is reduced, a minimum of 4 feet of overlap shall be required.

4. For wells drilled through formations that need special sealing techniques to protect aquifers, ARM 36.21.655 through 36.21.660 suggest alternative procedures that may be required and are intended as examples that can be modified to protect the aquifer.

3.2 PROTECTION OF GROUND WATER QUALITY

A. Furnish, install, and remove temporary surface casing to support the walls of the larger well bore until the grout surface seal is in place.

B. Utilize cement grout to shut off unsatisfactory water horizons or to stabilize caving formations.

Place grout utilizing a grout pump and tremie.

C. All wells shall be completely cased to the bottom of the usable drill hole and sealed in accordance with ARM 36.21.654.

D. The Contractor shall exercise precautions during construction to prevent surface water and other foreign materials from entering the drilled hole. Between operations the Contractor shall temporarily cap the well to prevent contamination.

E. Water pumped from the well shall be conducted to a place to dispose of the water without damage to property or the creation of a nuisance.

3.3 PERMANENT CASING INSTALLATION

A. Weld casing segments to form continuous watertight casing joints. Prepare and weld casing as follows:

1. Cut casing ends square.

2. Bevel end to be joined.

3. Align casing segments.

4. Join casing segments by electric arc welds. Use enough passes to completely fill formed slot. Proportion placement of weld material to provide a minimum of three full passes over the joint area. Remove slag from welded area between passes.

B. Weld the required access port 12 inches below finish top of the permanent casing.

C. Permanent casing shall extend 24 inches above natural ground line.

3.4 SAMPLING OF PENETRATED MATERIAL

A. Sampling formations shall be conducted in accordance with ARM 36.21.667. Samples shall be collected at each change in material and at 5 ft intervals in the water-bearing aquifers.

B. Sampling Procedure for Rotary Methods: Remove drilled material from hole. Drill 1-1/2 feet into formation being sampled. Force drilled material out into a clean tub. Allow to settle and obtain representative sample.

3.5 CASING PERFORATIONS

A. Place cement grout plug in bottom of casing prior to perforating. Perforate casing in place in the hole.

B. Demonstrate perforator on casing in the hole above the cut-off line.

1. Use a perforator type that produces slots approximately 3/8-inch by 2-1/2 inches in size such as a Mills Knife or Holte Casing Perforator which produces slots 1/8 by 1 inch long;

or other approved method.

2. Torch-perforate casing only if ordered in writing by the Contracting Officer. Torch slots 1/4-inch wide by 12 inches long, at 120 degrees. Stagger tops of adjacent slots 6 inches.

3.6 GROUT SURFACE SEAL

A. Construct the grout surface seal in the presence of the Contracting Officer.

B. The annular space between the permanent well casing and the drill hole shall be filled and sealed with Cement Grout to comply with State of Montana regulations and the following:

1. Drill the upper drill hole such that the annular space is minimum of 4 inches in diameter larger than the nominal diameter of the permanent well casing and at least 25 feet below the ground surface.

2. Slowly remove the temporary surface casing as the annular space is filled with grout.

Alternately, the temporary surface casing may be removed after the grout has been placed but not later than one half hour after initial introduction of grout into the hole.

3. Place sealing material under pressure through pipes, starting at bottom of the area to be filled and retracting pipes as space is filled. Continue sealing until entire space is filled.

Complete the surface seal by topping off the fresh grout after settlement occurs and within one half hour after initial placement of the grout surface seal.

3.7 WELL DEVELOPMENT

A. Develop the well using Surging or Air Jetting methods in accordance with ARM 36.21.653.

1. Once completed and before conducting yield and drawdown tests, the well shall be developed to remove all fines, drill cuttings, drilling fluids and additives. The method of developing shall be determined by the well drilling Contractor and approved by the Contracting Officer.

3.8 CLEANING AND DISINFECTION

A. Disinfect all casing, pipe, pumps, gravel, packers, drilling tools or other items to be placed in the well with a 500 mg/l solution (1 gallon of chlorine bleach per 100 gallons clean water) to avoid contamination. Disinfect all items placed in the well.

B. Clean and disinfect the well upon completion of well development. Disinfection may be done prior to test pumping.

1. Thoroughly clean the well by removing all foreign substances and if required, swab with alkalis to remove oil and grease.

2. After cleaning, disinfect the well with chlorine solution of sufficient strength to provide a 25 mg/l chlorine residual in all parts of well. Disinfect as follows:

a) Pour a concentrated chlorine solution into well. Agitate well water from top to bottom with a bailer or other method approved by Contracting Officer for at least 30 minutes. After agitating, wash the walls of the casing above water level with water bailed from the well. Leave chlorine solution in the well for a period of at least 12 hours. Remove solution as part of the pump test. Do not let chlorinated water pumped from the well to flow directly into any surface waters.

b) Test chlorine residual. If less than 10 mg/liter remain, repeat disinfection process.

C. After disinfection pump well at desired yield for a minimum of 30 minutes or until no chlorine residual remains.

3.10 PUMPING TEST

A. Conduct final pumping test after well has been constructed, cleaned, and tested for plumbness and alignment. Contractor shall give the Contracting Officer a minimum of 24 hours advance notice prior to testing. The contractor shall supply pumps and equipment required and perform a quantitative pumping test on the completed well.

1. Furnish copies of the aquifer testing results to the Contracting Officer. Provide the following data to the Contracting Officer within 15 days after completion of all work:

a) Static water level

b) Pump rate and means of discharge.

c) The one hour stabilized pumping level achieved.

d) Recovery level and time of recovery

e) Depth of test pump setting

f) Maximum drawdown

B. The test shall be performed in the presence of the Contracting Officer. During pumping test, measure the drawdown level in feet below static level. Also measure the pumping rate at least every two minutes until drawdown stabilizes and every 5 minutes thereafter.

1. Well shall be tested for yield and drawdown for a period of not less than 2 hours by pumping. During testing the discharge rate of water shall be as uniform as possible.

Pumping test shall be performed as follows:

a. Test pump the well at 20 GPM. If the water level stabilizes at less than 50% of the static water depth, continue pumping for an additional time of 1 hour.

b. If the drawdown is greater than 50% of the static water depth, reduce the pumping rate to 12 GPM. If the water level stabilizes at less than 50% of the static water depth, continue pumping for an additional time of 1 hour.

c. If the drawdown at 12 GPM is greater than 50% of the static water depth, reduce the pumping rate until the water level stabilizes. Continue pumping for an additional time of 1 hour.

d. After completion of pumping, record water level recovery every 5 minutes until static water depth is reached.

2. Water flow rate and depth measuring equipment shall consist of the following:

a. Weir box, orifice, water meter, or other device satisfactory to Contracting Officer for measuring flow of water.

b. Flow control gate valve installed on pump discharge for controlling rate of water flow from pump.

c. Provide an airline complete with Schrader valve and a 3-1/2 -inch diameter pressure gage which reads directly in feet. Provide compressed air or at minimum a tire pump.

Terminate airline approximately 3 feet above test pump intake.

3.11 WATER QUALITY TEST SAMPLES

Samples of water will be collected by the Contracting Officer for quality testing by the Government after cleaning and disinfection is complete. Contractor shall supply pumping equipment for collection of water quality samples by the Contracting Officer.

3.12 PERMANENT ABANDONMENT

A. If the new well has been constructed and does not provide an adequate supply of water for use for which it was drilled, and the Contracting Officer determines that a well should be abandoned, the well shall be abandoned in accordance with ARM 36.21.670 through ARM

36.21.678. Any remaining uncompleted contract items or projects thereof pertaining to that well will be canceled, in writing, without prejudice to either the Contractor or the Forest

Service. Payment will be made for all items of work or portions thereof completed prior to notice of such cancellation.

B. Any well that is to be permanently abandoned shall be filled in such a manner that vertical movement of water within the well bore, including vertical movement of water within the annular space surrounding the well casing, is effectively and permanently prohibited. All fluids within a well are to be permanently confined to the specific strata in which they were originally encountered.

C. Abandoned wells must be filled with sealing material to within 3 feet of the surface. Any remaining hole shall be filled with naturally occurring soils.

D. The abandoned well shall not produce water nor serve as a channel for movement of groundwater.

E. Land surface shall be restored to a like condition, safe to livestock and humans.

F. Where possible, all casings or liners shall be removed. If the casing cannot be removed, it shall be cut off or driven downward so that the top of the casing is at least 3 feet below the ground surface.

G. A water well log report, Form No. 603, fully describing all abandonment procedures, shall be submitted to the Ground Water Information Center (GWIC) of the MBMG within 60 days of abandoning the well.

PART 4 - MEASUREMENT AND PAYMENT

4.1 MEASUREMENT AND PAYMENT

A. Payment will be at the contract unit price for each accepted item designated below. One of the following methods of measurement for determining final payment is designated on the Schedule of Items for each pay item:

1. Actual Quantities (AQ) – The actual measured quantity of completed work is paid.

2. Lump Sum Quantities (LSQ) - These quantities are paid as one complete unit of work as required by or described in the contract. Work includes necessary materials, equipment, and labor to complete the job. This payment is not based on measured quantities.

B. Authorization from the Contracting Officer is required for quantities listed in the Schedule of

Items to be increased. No payment will be made for additional quantities unless authorized.

PART 2 -

C. Methods of Measurement are as follows:

PART 3 -

1. Equipment move-in/out measurement will be of the completed move-in and move-out of all personnel, equipment, and materials necessary to complete the project.

2. Surface seal measurement will be the linear feet of depth of larger hole drilled and sealed, including drilling and all material used in the surface seal except permanent casing.

3. Well drilling to accommodate 6-inch casing will be measured by the linear feet of depth of open hole measured from bottom of surface seal to the bottom of the well hole.

4. Casing-In-Place measurement are linear feet of permanent casing furnished & installed.

5. Perforating measurements will be by the linear feet of casing perforated.

6. Well Development is a singular pay item for all the materials, equipment, labor, and time the Contractor spends developing well.

7. Pump Test is a singular pay item for all the materials, equipment, labor, and time the

Contractor spends pumping the well for the purpose of determining yield and drawdown.

8. Plugging Well measurement will be paid by linear feet of well plugged including all required materials.

D. Payment will be made under:

PAY ITEM DESCRIPTION PAY UNIT

332100-1 Equipment Move-in/Move-out Lump Sum

332100-2 Surface Seal (includes drilling) Linear Foot

332100-3 Drilling to Accommodate Casing - 6-inch Linear Foot

332100-4 Casing in Place - 6-inch Linear Foot

332100-5 Perforating Linear Foot

332100-6 Well Development Lump Sum

332100-7 Pump Test Lump Sum

**** END OF SPECIFICATION 332100 ****