Attachments.pdf

USDA FOREST SERVICE PROJECT SPECIFICATIONS

Rev. Date 07/12 Toketee Lake CG Well Installation 01200 - 1/1 Mobilization Payment Procedures

SECTION 01200

MOBILIZATION PAYMENT PROCEDURES

1. PART 1 - GENERAL

1.01 SUMMARY

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

2. PART 2 - PRODUCTS (NOT USED)

3. PART 3 - EXECUTION (NOT USED)

4. PART 4 - MEASUREMENT AND PAYMENT

4.01 PROGRESS PAYMENTS WILL BE MADE AS FOLLOWS:

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

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

C. Upon completion of all work on the project, any unpaid amount for mobilization will be paid.

D. The total of all payments shall not exceed the original contract amount for this item.

4.02 BASIS OF PAYMENT

A. Payment will be made under:

PAY ITEM DESCRIPTION PAY UNIT

01200-1 Mobilization Lump Sum

END OF SECTION

Rev. Date 07/13 Toketee Lake CG Well Installation 02520 - 1/9 Wells

SECTION 02520

WELLS

1. PART 1 - GENERAL

1.01 SUMMARY

A. This section specifies the drilling, casing, developing, sealing and test pumping of a potable water well.

1.02 WELL DRILLING PERMIT

A. The contractor is responsible for obtaining and paying for a valid well drilling permit from the Oregon State Water Resources Department.

1.03 SUBMITTALS

A. Submit a Well Installation Plan 10 business days prior to beginning drilling operations. The plan shall be approved and signed by an officer (or owner) of the well drilling company. The following requirements shall be incorporated into the Contractor’s Well Installation Plan and followed in the field. The plan shall include but shall not be limited to, a discussion of the following:

1. Description of well drilling methods and installation procedures, including any temporary casing used.

2. Drill cuttings and fluids disposal

B. Submit sufficient product information for all products described within these specifications.

C. Submit any soil samples, Well Screen Product, well screen recommendation (opening, length, installation well depth, etc.), well pumping results and testing results to the Contracting Officer.

D. Submit 1 copy of the State Well Driller’s Report to the COR within 15 days of well completion.

E. Submit one copy of the daily shift record, R6-FS-7400-04, each week. A blank form is attached to this contract.

1.04 REGULATORY REQUIREMENTS

A. 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 COR, shall comply with applicable State and Local codes including (OAR 690, Division 210 – WELL CONSTRUCTION STANDARDS).

1.05 PROJECT CONDITIONS

A. Government subsurface investigation information available for the drilling location is contained in the attached Toketee Lake Campground Water Well Geology Report.

Rev. Date 07/13 Toketee Lake CG Well Installation 02520 - 2/9 Wells

2. PART 2 - PRODUCTS

2.01 MATERIALS

A. Casing.

1. New, black welded steel: ASTM A53, bearing factory markings of conformance.

2. Size, Weight and Wall Thickness. Conform to the following:

SIZE WEIGHT MINIMUM WALL

(Inches) (Lbs. Per Ft.) THICKNESS (Inches)

6 17.02 0.250

3. Lengths.

a. 5 foot minimum lengths.

4. Joints.

a. Electric arc welded.

B. Well Screen.

1. Construction.

a. Continuous slot type with closed, bail bottom.

2. Material.

a. Screen shall be constructed of one of the following.

1) Stainless Steel - ASTM A240 Type 316.

3. Diameter.

a. Telescopic size to fit casing in which it is to be installed.

4. Slot Size and Length.

a. Manufacturer’s standard, submit slot size for approval by the COR.

5. Packer.

a. Self-sealing, stainless steel using a V-shape, flexible neoprene ring, and mounted on heavy metal ring which can be threaded or welded to top of screen.

C. Access Port.

1. Nongalvanized steel coupling with removable pipe plug; or Weldolet by

Bonney Forge Inc., Mount Union, PA; or equal. Provide 1-1/2 inch diameter opening.

D. Sanitary Seal.

1. Bolted, sanitary type, with rubber gasket and grommeted holes for all pipes with power and control cables passing through it.

E. Drilling Water.

1. Suitable for domestic consumption.

F. Cement Grout.

1. Mix Proportions.

Rev. Date 07/13 Toketee Lake CG Well Installation 02520 - 3/9 Wells

a. Portland Cement with a maximum of 6 gallons of water per sack of cement. Up to 5 percent Bentonite clay, by weight, may be added.

2. Cement.

a. Type II or III Portland Cement.

3. Water.

a. Suitable for domestic consumption.

G. Bentonite.

1. Commercial Bentonite, fine grained, impervious, with at least 50 percent

Bentonite and 0.5 mm maximum size of remaining portion.

H. Sample Containers.

1. Resealable bags, or plastic or waxed cardboard containers with sealing lid; 1 quart in size.

I. Drilling Fluids.

1. A commercial agent used to aid in removal of cuttings. Bentonite may be used only with approval of the COR.

3. PART 3 - EXECUTION

3.01 PREPARATION

A. Exercise precautions to prevent foreign materials and surface water from entering drilled hole.

B. The Contractor shall protect the adjacent terrain and surface water from siltation and contamination. Construct a settling basin to contain the drilling fluid, cuttings and compounds and provide a means to filter sediment prior to discharging excess water.

3.02 CONSTRUCTION

A. Temporary Surface Casing.

1. Furnish, install, and remove all temporary surface casing necessary to support the walls of the larger well bore where the grout surface seal is to be placed.

B. Plumbness and Alignment of Wells.

1. Where Hand Pumps or Submersible Pumps are to be installed.

a. Plumbness.

1) Drill well vertical. Axis of well shall not deviate from vertical by more than casing inside diameter for each 100 feet of depth.

b. Alignment.

1) Alignment shall be such that a 20 foot plummet will pass all sections of the well easily.

C. Grouting.

1. Utilize cement grout to shut off unsatisfactory water horizons or to stabilize caving formations. Place grout utilizing a grout pump and tremie.

D. Minimum Length of Permanent Casing.

Rev. Date 07/13 Toketee Lake CG Well Installation 02520 - 4/9 Wells

1. The COR will determine the actual depth to which the permanent well casing shall extend; however, the casing will extend no less than 18 feet below the ground surface. Provide centering guides to keep the permanent well casing centered in the oversize drill hole.

2. The permanent well casing shall extend from 24 inches above the top of the well slab to the following depths as applicable:

a. If drill hole passes through sound, uncreviced, consolidated rock formation, case a minimum of 5 feet into the rock formation. If an unconsolidated formation exists below the rock formation, continue the permanent well casing or well screen to the bottom of the formation or to the bottom of the well, whichever is deeper.

b. If drill hole passes through unconsolidated formations and no significant clay lenses, case a minimum of 5 feet below static water level. Continue the permanent well casing or well screen to the well bottom.

c. If drill hole passes through unconsolidated formation with a significant clay layer, case a minimum of 5 feet into clay layer. If an unconsolidated formation exists below the significant clay layer, continue the permanent well casing or well screen to the bottom of the formation or to the bottom of the well, which ever is deeper.

E. Grout Surface Seal.

1. Construct the grout surface seal in the presence of the COR.

2. The annular space between the permanent well casing and the drill hole shall be completely filled and sealed with cement grout to comply with applicable State regulations and the following:

a. Diameter of upper drill hole: Drill the annular space a minimum of 4 inches in diameter larger than the nominal diameter of the permanent well casing and at least 18 feet below the ground surface.

3. Temporary Surface Casing Removal.

a. Remove all temporary surface casing necessary to support the walls of the larger well bore while placing the grout surface seal.

4. Grout Surface Seal Placement.

a. Construct grout surface seal by placing or forcing grout from the bottom upward between the permanent casing and the open hole or temporary surface casing.

b. Slowly remove the temporary surface casing as the annular space is filled with grout. Alternately, the temporary surface casing may be removed immediately after the grout has been placed, but not later than 1/2 hour after initial introduction of grout into the hole.

c. Complete the surface seal by topping off the fresh grout after settlement occurs and within 1/2 hour after initial placement of the grout surface seal.

F. Permanent Casing Installation.

1. Joints.

a. Weld casing segments to form continuous, watertight casing in area to be cased. Prepare and weld casing as follows:

1) Cut casing ends square.

Rev. Date 07/13 Toketee Lake CG Well Installation 02520 - 5/9 Wells

2) Bevel end to be joined.

3) Align casing segments.

b. Join segments together using electric arc welder. Use sufficient number of passes to completely fill slot formed. Proportion placing of weld material to provide a minimum of 3 full passes within the slot area. Remove slag from welded area between passes.

2. Access Port.

a. Weld access port 6 inches below finish top of the permanent casing.

G. Well Screen.

1. Install by the pull back method.

H. Develop the well using either of the following methods:

1. Development by Surging.

a. After the well screen has been installed or the casing has been perforated, develop well by surging unless other methods are approved in writing by the COR.

b. Do not use surge block inside the screen or opposite casing perforations.

Surge by natural drilling action of the drilling machine. Start surging at a slow rate and gradually progress to a maximum rate. Continue surging until no more fines can be brought into the well or until ordered to stop by the COR.

c. Continue well development until water from well is clear and free of fines.

2. Development by Air Jetting.

a. Development of completed well, with screen in place, performed by air jetting method. Development shall start at the bottom of the screen or perforations gradually working toward the top, so that all fines are pulled through the screen and forced out of the well. Continue development (may require more than 1 pass) until no more fines can be brought into the well or until ordered to stop by the COR.

I. Capping.

1. Upon completion of well, weld a 3/16 inch steel plate, approximately 1/2 inch larger in diameter than casing OD, over the cut off casing top. Spot weld in 4 places around casing so no holes larger than 1/16 inch are present.

3.03 FIELD QUALITY CONTROL

A. Test Equipment.

1. Provide the following equipment for the test:

a. A 20 foot long plummet of well casing of the next smaller size than the installed well casing, with a support ring or hook on one end.

b. A 1 foot plummet with an outside diameter 1/4 inch less than the casing inside diameter; a 1/8 inch wire cable or other suitable line long enough to reach the full depth of the well, and a suitable tripod or support for suspending the cable at a point 10 foot 0 inches above and centered in the top of the casing.

B. Alignment may be tested using either Procedure 1 or Procedure 2.

1. Procedure 1.

Rev. Date 07/13 Toketee Lake CG Well Installation 02520 - 6/9 Wells

a. Lower 20 foot long plummet down the well. If the plummet passes all sections of the well easily, alignment of the well is satisfactory.

2. Procedure 2.

a. Lower the 1 foot long plummet down the well, measuring the offset from true center of the cable at the top of the casing at 10 foot intervals down the well.

b. The calculated centerline of the well casing is the product of the measured offset times the depth divided by the distance from the top of the casing to the support point (10 foot 0 inches).

Calculated Centerline = Measured Offset x Depth

Support Length (10 foot 0 inches)

c. Plot the calculated centerline against depth to obtain a graph of the position of the centerline of the well casing.

d. Use this graph to determine whether a 20 foot plummet, 1/2 inch smaller than the inside diameter of the actual well casing will pass the points of misalignment. Draw a straight line from 10 feet above to 10 feet below the point of misalignment; this corresponds to the centerline of the 20 foot plummet. Measure the maximum right angle deviation from the centerline of the plummet to the calculated centerline of the well casing. If this offset were less than 1/4 inches, the plummet would pass freely; if it is more than 1/4 inch, the plummet will not pass the point of misalignment.

C. Sampling of Penetrated Material.

1. Sampling Interval.

a. Sample at every change of material or at 25 foot intervals within the same material.

2. Sampling Procedure for Rotary Methods.

a. 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. Sampling Procedure for Cable Tool Method.

a. Bail hole clean. Drill 1-1/2 feet into formation being sampled. Remove sludge with sand pump or flat bottom bailer. Discharge into clean tub.

Allow to settle and obtain representative sample.

D. Pumping Test.

1. Supply all pumps and equipment required and perform a quantitative pumping test on the completed well after the depth has been accurately measured by the COR. The test shall be performed in the presence and under the direction of the COR. During the pumping test, the drawdown in feet below static level and the pumping rate shall be measured at least every 2 minutes until drawdown stabilizes and every 10 minutes thereafter.

2. Test Procedure.

a. Pumping test shall be performed as follows:

Rev. Date 07/13 Toketee Lake CG Well Installation 02520 - 7/9 Wells

1) Test pump at 60 gpm. If the water level stabilizes at less than 50 percent of the static water depth, continue pumping for an additional 4 hours.

2) If the drawdown is greater than 50 percent of the static water depth, reduce the pumping rate to 30 gpm. If the water level stabilizes at less than 50 percent of the static water depth, continue pumping for an additional 4 hours.

3) If the drawdown at 30 gpm is greater than 50 percent of the static water depth, reduce the pumping rate until the water level stabilizes.

Continue pumping for an additional 4 hours.

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

3. Measuring Equipment.

a. Measuring equipment shall consist of the following:

1) Flow Rate: Weir box, orifice, water meter, or other device satisfactory to COR for measuring flow of water.

2) Flow Control: Gate valve on pump discharge for controlling rate of water flow from pump.

3) Drawdown Depth: Provide airline complete with pressure gauge 3-1/2 inch minimum diameter, reading directly in feet. Provide tire pump. Terminate air line approximately 3 feet above pump intake.

3.04 CLEANING AND DISINFECTION.

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

1. Cleaning.

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

2. Disinfection.

a. After cleaning, disinfect the well with NSF approved chlorine solution of sufficient strength to provide a 50 mg/l chlorine residual in all parts of well.

b. Disinfect as follows:

1) Dump concentrated chlorine solution into well.

2) Agitate well water from top to bottom with a bailer or other method approved by COR for at least 30 minutes.

3) After agitating, wash the walls of the casing above water level thoroughly with water bailed from the well.

4) Leave chlorine solution in the well for a period of at least 12 hours.

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

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

B. Bacteriological Test Samples.

1. Samples of water will be collected by the Government for testing of bacteriological quality after cleaning and disinfection is complete.

Rev. Date 07/13 Toketee Lake CG Well Installation 02520 - 8/9 Wells

3.05 ABANDONING WELL

A. Plugging Well.

1. If COR orders the well to be abandoned, plug the well in accordance with State of Oregon Regulations (OAR 690, Division 220 – ABANDONMENT OF WELLS) to within 5 feet of original ground as casing is removed. Fill remaining hole to original ground with native topsoil.

B. Removing Casing.

1. Contractor shall undertake removal of the casing when directed in writing by the COR. Removal operation shall continue until successful or until ordered to stop in writing by the COR. Every practical means shall be used to remove the casing including hydraulic jacks or other methods approved by the COR.

Permanent casing removed shall become the property of the Government and shall be used in other wells, if any, remaining to be drilled under this Contract.

If the casing cannot be used for this Contract, the Contractor, at the option of the Government, shall take possession of the casing and reimburse the Government at 50 percent of the Contractor’s invoice price for the casing.

4. PART 4 - MEASUREMENT AND PAYMENT

4.01 METHOD OF MEASUREMENT

A. Surface Seal.

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

B. Drilling to Accommodate Casing.

1. Measurement will be of the linear feet of depth of open hole measured from bottom of surface seal to the bottom of the hole.

C. Drive Shoe.

1. Measurement will be of the furnished and installed drive shoe.

D. Casing-In-Place.

1. Measurement will be of the linear feet of permanent casing furnished and installed.

E. Well Screen.

1. Measurement will be of the linear feet of well screen, excluding length of fittings, installed at the depth specified by the COR.

F. Well Development.

1. Measurement will be of the hours of time the Contractor spends developing well.

2. Cleaning and disinfection are incidental to this pay item.

3. Capping completed well is incidental to this pay item.

G. Test Pumping.

1. Measurement will be of the hours of time the Contractor spends pumping.

Rev. Date 07/13 Toketee Lake CG Well Installation 02520 - 9/9 Wells

H. Removing Casing.

1. Measurement will be the hours of time the Contractor spends removing or attempting to remove casing.

I. Plugging Well.

1. Measurement will be of the linear feet of well plugged including all required materials.

J. Grouting.

1. Measurements will be of the number of sacks of cement used and placed by grout pump and tremie for the purpose of stabilizing caving formation or shutting off unsatisfactory water horizons, where ordered in writing by the

COR.

4.02 BASIS OF PAYMENT

A. Payment will be at the Contract unit price for each item as designated below, accepted.

B. Payment will be made under:

PAY ITEM DESCRIPTION PAY UNIT

02520-1 Surface Seal (includes drilling) Lump Sum 02520-2 Drilling to Accommodate Casing 6” inch Linear Foot 02520-3 Drive Shoe Lump Sum 02520-4 Casing in Place 6” inch Linear Foot 02520-5 Well Screen 4” inch Linear Foot 02520-6 Well Development Hour 02520-7 Test Pumping Hour 02520-8 Removing Casing Hour 02520-9 Plugging Well Linear Foot 02520-10 Grouting Sacks

END OF SECTION

Industrial Camping Authorization USDA Forest Service

Diamond Lake Ranger District

PROJECT NAME: Toketee Potable Well

CONTRACTOR:

Temporary camping by you and your employees on National Forest Land in conjunction with performance of work will be permitted at the Toketee Campground Group Site (immediately adjacent to the well location), with prior approval by the Forest Service, for the contract period and subject to the following conditions:

1. Campers will comply with all Federal, State and County laws, including fire regulations.

2. All campground regulations will be followed (e.g. Pets on leash, quiet hours, no firearms)

3. Camping fees are waived for the duration of the contract activities.

4. Restroom facilities at the campground may be used.

5. Garbage not-associated with the potable well project may be disposed of in FS garbage bins at the campground.

6. Camp sites must be kept in a neat and orderly condition. Activities not related to the performance of work will be prohibited, such as: planting non-native vegetation, storing vehicles or any other debris.

7. Camping is limited to Group Site. The parking area adjacent to the pipeline fence is off limits for heavy equipment. The pipeline runs underneath the parking area. GVW of 25,000 max on the pipe. Equipment exceeding the GVW limit is strictly limited in the parking area.

8. All streams and resources of water shall be protected from potential contamination (e.g. store water polluting materials so as to prevent any spillage into water sources).

9. Well equipment can be left at the well site location; however, it cannot impede regular campground traffic flow.

10. No improvements or permanent structures will be constructed.

11. Provided permit tag, or copy of this form will be filled out and posted in camp vehicle window.

Names of Campers:

Description of all vehicles associated with camp (include lis. # and state):

Contractor __________________ Approved___________________________

Date _______________________ DL DISTRICT RANGER: Viva Worthington

Date ______________________________

USDA Forest Service R6-FS-7400-4 (2/69)

1- R.O. (E)

1- R.O. (OAS)

BID No. .

Casing in hole Ft. 1n. Drilling Done Ft. Remarks:

Last Report

This shift

Total to date

Diam. - inches

Static Water Level

Beginning of shift Driller

End of shift (Sign here)

Casing in hole Ft. 1n. Drilling Done Ft. Remarks:

Last Report

This shift

Total to date

Diam. - inches

Static Water Level

Beginning of shift Driller

End of shift (Sign here)

Casing in hole Ft. 1n. Drilling Done Ft. Remarks:

Last Report

This shift

Total to date

Diam. - inches

Static Water Level

Beginning of shift Driller

End of shift (Sign here)

Formation:

Ft.

DAILY WELL DRILLING SHIFT RECORD

1/4 1/4 Section T. R. W.M.

U. S. FOREST SERVICE

REGION 6

WELL LOCATION National Forest

Total to date

Formation:

Ft.

Last Report

This shift

Start Shift End Shift Date

Total to date

Formation:

Ft.

Last Report

This shift

End Shift DateStart Shift

Last Report

This shift

Total to date

Distribution by COR:

1- District

Contractor: Furnish 4 legible copies to COR

Ranger Station, Work Center. Campground, ate.)

Start Shift End Shift Date

DRILLING C0.

1- Supervisor (E) within 15 days after completion of well