Amendment_0003_SF30.pdf

NSN 7540-01-152-8070 30-105 STANDARD FORM 30 (REV. 10-83)

PREVIOUS EDITIONS UNUSABLE Prescribed by GSA FAR (48 CFR) 53.243

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

1. Contract ID Code Page of Pages

1 22

2. Amendment/Modification No.

3. Effective Date

15 Apr 2016

4. Requisition/Purchase Req. No. 5. Project No. (if applicable)

PO15-MO3

6. Issued By Code

Indian Health Service DES 701 Fifth Ave, Suite 1600 M/S-24 Seattle, WA 98104

7. Administered By (If other than Item 6) Code

Same as block 6

8. Name and Address of Contractor (No., Street, County, and Zip Code) (X) 9A. Amendment of Solicitation No.

16-102-SOL-00006

X 9B. Date (See Item 11)

18 February 2016 10A. Modification of Contract/Order No.

10B. Date (See Item 13)

Code Facility Code

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in item 14. The hour and date specified for receipt of Offers is extended X is not extended.

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended, by one of the following methods:

(a) By completing items 8 and 15, and returning 1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted; or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDG- MENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT

IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. Accounting and Appropriation Data (if required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACT/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. This change order is issued pursuant to: (Specify authority) The changes set forth in item 14 are made in the Contract Order No. in item 10A.

B. The above numbered Contract/Order is modified to reflect the administrative changes (such as changes in paying office, appropriation date, etc.)

Set fourth item 14, pursuant to the authority of FAR 43.103 (b)

C. This supplemental agreement is entered into pursuant to authority of:

D. Other (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

14. Description of Amendment/Modification (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

Yakama Test Well Construction Prepared by: Fannon, John W.

16-102-SOL-00006

************************Description of this amendment begins on page 2****************

Except as provided herein, all terms and conditions of the document referenced in item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. Name and Title of Signer (Type or Print) 16A. Name and title of Contracting Officer (Type or Print)

15B. Contractor/Offeror

(Signature of person authorized to sign)

15C. Date Signed 16B. United States of America

(Signature of Contracting Officer)

16C. Date Signed

SF30 Continuation of Block Narrative 22Page of

SUMMARY OF CHANGES

The Request for Quote is hereby amended as follows:

1. The Quote due date is hereby extended to 1300 Pacific Standard Time on 25 April 2016 to Jane.Stuessy@ihs.gov.

2. Section A3 Schedule of Items is hereby amended to be replaced in its entirety as stated below:

Section A-3 Schedule of Items: Quoters are required to submit quotes on all Schedule Items (Base and Option(s)). The Government may make award on Base Item numbers 1 through 9 listed below at initial award. The Government will determine whether to authorize the construction of the Optional Well (Option Items), based on pump test results as described in Section C-2 SCOPE OF WORK and as determined to be in the best interest of the Government.

Schedule of Items Test Well Construction Project Base items

Item No. Description Quantity Unit

Unit Price

Total Price

1. Mobilization/Demobilization 1 LS $ $

2. 14-inch Well Drilling 50 LF $ $

3. 10-inch Well Drilling 350 LF $ $

4. 10-inch Well Casing 300 LF $ $

5. 10-inch Well Screen 100 LF $ $

6. Sanitary Seal 50 LF $ $

7. Well Development 5 HR $ $

8. Test Pumping 24 HR $ $

9. Water Analysis 1 LS $ $

Subtotal Base Bid $ 7.9% State/Local Tax $

Total $

3. Section 01270 is hereby amended to be replaced in its entirety as stated below: 1270- Price and Payment.

SECTION 01270

PRICE AND PAYMENT

PART 1 - GENERAL

1. SUMMARY

B. Work covered by this section includes method of measurement and basis of payment for all sections included.

C. All measurements and payments will be based on completed and accepted work performed in accordance with the drawings and specifications.

D. Payment shall be full compensation to complete the work items in good faith, including incidental work.

E. Payment under each line item shall be full compensation for the following:

1. labor

2. materials

3. equipment

4. tools

5. testing

6. subcontracts and services

F. Necessary erosion control and site restoration measures shall be considered incidental to all construction activities and no separate payment will be made for such measures.

Clearing, grubbing and other measures necessary to facilitate access to the proposed

Schedule of Items Test Well (Optional Well) Construction Project Option Items

Item No. Description Quantity Unit

Unit Price

Total Price

1. Mobilization/Demobilization 1 LS $ $

2. 14-inch Well Drilling 50 LF $ $

3. 10-inch Well Drilling 350 LF $ $

4. 10-inch Well Casing 300 LF $ $

5. 10-inch Well Screen 100 LF $ $

6. Sanitary Seal 50 LF $ $

7. Well Development 5 HR $ $

8. Test Pumping 24 HR $ $

9. Water Analysis 1 LS $ $ Subtotal Base Bid $ 7.9% State/Local Tax $ Total $ test well location will be completed by the TWSP prior to the start of test well construction.

1.02 BID ITEMS

A. TEST WELL CONSTRUCTION

1. Mobilization & Demobilization

a. Measurement: By lump sum upon completion of activities to deliver all materials, equipment and personnel associated with the work to complete the 10-inch test well and for corresponding demobilization.

b. Basis for Payment: Payment shall be full compensation for the item of work upon completion of all work activities and site cleanup.

c. Work related to this payment is addressed in Sections:

(1) 02525 –Test Well Drilling

2. Well Drilling, 14-inch Diameter

a. Measurement: By the vertical foot drilled for the completed well and in accordance with the technical specifications.

b. Basis for Payment: Payment shall be full compensation for well drilling necessary for construction of a 10-inch test well based on the actual number of linear feet drilled, sampling, well log, alignment test, well cap, and all other necessary items required to complete the work as specified. No payment will be made for any quantity deeper than the depth designated by the Project Engineer. Payment will only be made after a well log has been submitted to the Project Engineer. For abandoned wells that are not the fault of the Contractor, compensation shall be paid at the unit bid price.

c. Work related to this payment is addressed in Sections:

(1) 02525 –Test Well Drilling

3. Well Drilling, 10-inch Diameter

a. Measurement: By the vertical foot drilled for the completed well and in accordance with the technical specifications.

b. Basis for Payment: Payment shall be full compensation for well drilling necessary for construction of a 10-inch test well based on the actual number of linear feet drilled, sampling, well log, alignment test, well cap, and all other necessary items required to complete the work as specified. No payment will be made for any quantity deeper than the depth designated by the Project Engineer. Payment will only be made after a well log has been submitted to the Project Engineer. For abandoned wells that are not the fault of the Contractor, compensation shall be paid at the unit bid price.

c. Work related to this payment is addressed in Sections:

(1) 02525 –Test Well Drilling

4. Steel Well Casing, 10-inch Diameter

a. Measurement: By the vertical foot installed for the completed well and in accordance with the technical specifications.

b. Basis for Payment: Payment shall be full compensation for casing, drive shoes, and all other necessary items required to complete the work as specified. No payment shall be made for large diameter surface casing used as temporary construction aid, whether withdrawn or not. For abandoned wells that are not the fault of the Contractor, payment for casing shall be based on the following criteria. If the Contractor elects to remove the casing, compensation shall be paid at 25 percent of the unit bid price for that size casing. Undamaged casing may be reused in this contract, and when reused, it will be paid for at the unit bid price. If the Contractor elects to leave the casing in place, compensation shall be paid at 75 percent of the unit bid price for that size casing.

c. Work related to this payment is addressed in Sections:

(1) 02525 –Test Well Drilling

5. Stainless Steel Well Screen, 10-inch

a. Measurement: By the vertical foot installed for the completed well and in accordance with the technical specifications.

b. Basis for Payment: Payment shall be full compensation for formation sampling, all continuous-slot stainless steel screen material and assembly, packer, seals, couplings, bottom fittings, and other appurtenances. Any blank riser or bottom section used is not measured for payment.

c. Work related to this payment is addressed in Sections:

(1) 02525 –Test Well Drilling

6. Sanitary Seal

a. Measurement: By the vertical foot installed for the completed well and in accordance with the technical specifications.

b. Basis for Payment: Payment shall be full compensation for sanitary grout, placement of sanitary grout, and all other necessary items to complete the work as specified. No payment shall be made for grout required to fill an open hole drilled below the depth to which grouting was directed by the Project Engineer.

c. Work related to this payment is addressed in Section:

(1) 02525 –Test Well Drilling

7. Well Development

a. Measurement: By the hour for the actual time period spent on developing the well. No payment shall be made for time spent preparing and setting up well development equipment.

b. Basis for Payment: Payment shall be full compensation for well development at the contract unit price based on the length of time of actual well development.

c. Work related to this payment is addressed in Section:

(1) 02525 –Test Well Drilling

8. Test Pumping

a. Measurement: By the hour for the actual time period spent test pumping the well. No payment shall be made for time spent preparing and setting up for test pumping equipment.

b. Basis for Payment: Payment shall be full compensation for test pumping at the contract unit price based on the length of time of actual pump testing.

Time spent setting and removing the pump shall not be included in the basis for payment. If for any reason the pump or depth measuring equipment fails prior to completion of the specified test period, no payment will be made for the partial test.

c. Work related to this payment is addressed in Section:

(1) 02525 –Test Well Drilling

9. Water Analysis

a. Measurement: One time Lump Sum (LS) payment will be issued once two conditions are met.

(1) Receipt by the Owner and Project Engineer of satisfactory bacteriological analysis after initial disinfection. If initial results are unsatisfactory (presence of coliform), the Contractor shall perform one additional disinfection and bacteriological analysis and present results to the Owner.

(2) Receipt of the chemical analysis by Owner and Project Engineer.

b. Basis for Payment: Payment shall be full compensation for disinfection, sampling the water strata, performing all tests, submitting the results to the Owner, and all other necessary items required for a complete analysis.

c. Work related to this payment is addressed in Section:

(1) 02525 –Test Well Drilling

END OF SECTION 01270 SECTION

4. Section 02520 is hereby amended to be replaced in its entirety as stated below: Section 02520 Test Well Drilling.

SECTION 02520

TEST WELL DRILLING

PART 1 - GENERAL

1.01 SUMMARY

A. This section includes drilling, casing, screening, developing and testing of test water wells.

B. A complete SOC, VOC, IOC, Secondary Contaminants and Radionuclide test for a Group A water system will be performed for the completed well. Testing cost will be the responsibility of the well driller.

C. The completed test well shall be of single cased construction, complete with well screen, grout, and well cap.

D. The Contractor shall drill, case and screen wells at the size specified in the bid schedule for the test well shown on the attached location plan, or as directed by the Project Engineer.

E. All construction methods and materials for the test well shall meet or exceed state and local requirements.

F. The well drilling Contractor shall comply with state license requirements for well drilling in the state where the work is performed. In addition, the rig operator shall be licensed through the state as a water well operator.

G. The Contractor shall take such precautions as are necessary or as may be required to prevent contaminated water or water having undesirable physical or chemical characteristics from entering the well. The Contractor shall also take precautions during construction to prevent contamination or pollution from the ground surface.

H. Consolidated, unconsolidated and combinations of the two formations may be encountered during this contract. Unless specifically mentioned, there will be no distinction concerning the method of payment for the consolidated and/or unconsolidated drilling. The Owner will not be held accountable for variations of materials encountered during the drilling operations.

1.02 REFERENCES

A. ASTM A53 – Standard Specification for Pipe, Steel, Black and Hot Dipped, Zinc Coated Welded and Seamless.

B. ASTM A276 – Stainless steel well screen

C. State of Washington – Department of Ecology, Water Resources, Well Construction

D. Applicable state codes for the State of Washington

E. WAC Chapter 173-160

F. AWWA Standards A100-97 and A100-06

1.03 SUBMITTALS

A. Type of drilling equipment, including method (Mud or Air Rotary)

B. Well drilling rig operator experience and license number

C. Well screen and method of installation

D. Well casing and well cap

E. Method of disinfection

F. Method of development

G. Grout, method of mixing and installation

H. Water testing lab

1.05 CONFLICTS WITH STATE WELL CODES

A. The materials and construction methods specified herein are minimum requirements.

Where the appropriate state well codes require more stringent materials or execution methods, they shall apply.

B. Notify the Project Engineer of any planned deviation from these specifications before proceeding so any price changes or quantity adjustments may be negotiated.

1.06 ACCEPTANCE

A. Minimum final yield being sought is approximately 350 gallons per minute. If a stratum, which will produce in excess of the minimum yield, is encountered, the well shall be developed to produce the maximum yield obtainable through the well screen installed.

B. Water shall be clear and free of sand.

C. The drilling shall be accomplished by a rotary drilling machine.

D. Work covered by this section will not be accepted until records and testing connected with the work have been completed satisfactorily.

E. The well shall meet the following standards for plumbness and alignment.

1. Plumbness-the maximum allowable horizontal drift is 2/3 the inside diameter of the well casing per 100 feet of well depth.

2. Alignment-the alignment test shall consist of free passage of a 40-foot long section of dummy pipe with a width that shall not exceed pump or bowl diameter or 1 inch less than the I.D. of casing whichever is larger. If the test pipe binds, does not pass through the well casing freely or is bent as a result of testing procedure, the Project Engineer shall have the authority to reject the well as drilled and cased, with no payment to the contractor, until the deficiency is corrected to the Project Engineer’s satisfaction. No payment will be made to the contractor for the testing procedure or materials.

PART 2 – PRODUCTS AND EQUIPMENT

2.01 DRILLING EQUIPMENT

A. All drilling equipment used under this CONTRACT must be in good working order and capable of accomplishing the work required under this CONTRACT.

B. The OWNER and the ENGINEER reserve the right to inspect all equipment to be used under this CONTRACT and to reject any equipment deemed unsuitable.

2.02 WELL CASING

A. Steel Well Casing

1. The diameter and material of well casing shall be 10-inches.

2. Conform to ASTM A106-91 or A53-93a, Grade A or B, Type E, electric resistance welded or Type S, seamless.

3. Each length of pipe shall be clearly marked in accordance with ASTM A106-91 or A53-93a.

a. Markings shall include manufacturers name, type of pipe, ASTM number and pipe length.

b. Mill certificates shall be supplied if the Project Engineer deems the casing pipe or markings to be of questionable condition.

c. Marking shall be rolled, stamped or stenciled by the manufacturer. Pipe remarked by a pipe supplier, or well driller, will be rejected by the Project Engineer

4. Pipe shall be clean and free of oil, grease, rust, or other detrimental materials. All casing shall be new.

5. Lengths of casing shall be connected with either screwed couplings or approved welds. Welded joints shall be subject to the approval of the Project Engineer.

6. Pipe shall meet the following requirements:

Nominal Outside Nominal Minimum

Diameter Diameter Wall Thickness Weight

(inches) (inches) (inches) (lbs per lin. foot)

10 10.020 0.365 40.48

2.03 WELL SCREEN

A. General

1. Well screen openings shall be of the proper width to permit the maximum practical sand free yield after development. The openings shall be of geometric shape to permit maximum transmitting capacity without clogging or jamming. A sieve analysis of a representative sample to the water bearing formation may be requested by the Project Engineer to verify proper sizing of the well screen.

2. A well screen shall be installed.

3. The Project Engineer must approve any length and diameter of well screen in excess to the amount indicated on the bid schedule.

B. Stainless Steel Screen

1. Screen shall be designed to produce a minimum loss of head between the water bearing stratum and the well.

2. A telescopic screen and K-packer may be used in instances where caving of the bore is a concern. The project engineer must approve the use of a telescopic screen and associated methods for installation.

3. Designed for entrance velocity less than 0.1 feet per second

4. Continuous slot design, with outer windings and internal longitudinal bars.

5. Both members shall be type 304 stainless steel conforming to ASTM A276-92.

6. The maximum recommended tensile pull on the screen is 1600 pounds.

7. Screen shall be a commercial product, equal to screens manufactured by US Filter, Johnson Screens, New Brighton, MN or Howard Smith of Houston, TX.

2.04 GROUT

A. Proportion of Portland Cement and the least quantity of water (not over 6 gallons per cubic foot of cement) required giving a mixture of such consistency that it can be forced through the grout pipe.

1. Two percent (by weight) of bentonite clay may be added to the mixture to improve flow properties.

B. Bentonite grout, in lieu of cement, is acceptable if specified in the bid schedule.

2.05 DRILLING FLUID (MUD ROTARY METHOD)

A. Conform to standard accepted well drilling practice for water wells.

B. All drilling water shall be disinfected with chlorine, which shall be added to the water tank before each refilling in a quantity such that a concentration of 50-100 ppm of chlorine is obtained in all of the water.

2.06 WELL CAP

A. The well casing pipe shall be sealed or covered with an approved non-corrodible, watertight, vented, weather and vermin-proof compression type well cap. All nuts and bolts shall be made of non-corrodible material.

B. The well cap shall be equipped with a screened downward facing well vent not less than 1/4-inch in diameter. The vent shall be equipped with a vermin proof vent screen made of non-corrodible material.

C. Similar to Monitor 6WPSM.

PART 3 - EXECUTION

3.01 DRILLING

A. General

1. State license requirements shall be met.

2. Locate all existing underground utilities.

3. Construct well as indicated on the plans or as staked by the Project Engineer.

4. Prevent contaminated water from entering the well.

5. Utilize an approved drilling method.

6. Minimum final yield of 350 gallons per minute is being sought, however, well should always be developed to its maximum yield.

7. Drill wells no deeper than the depth specified in the bid schedule, unless approved by the Project Engineer.

8. If satisfactory yield is obtained at a lesser depth, terminate drilling and develop at that depth.

B. Rotary Method (Mud or Air)

1. Equipment must be in good condition, capable of drilling to 400 feet.

2. Capable of providing single cased construction, with well screen and grout.

3. Drill hole shall be sufficiently sized to provide unimpeded casing installation and grouting.

4. Drilling fluid and bit size (with approval of the ENGINEER) shall be sufficient to complete the bore hole to accept the casings and minimum grout thickness specified for the surface seal, pump chamber, and aquifer penetration sections.

5. Drilling water (mud rotary) shall be disinfected with a chlorine concentration of 50-100 ppm in the water tank.

6. If conventional mud rotary drilling is used in rock formations, the ENGINEER may require the periodic stopping of drilling, removal of mud from the hole and testing for yield with compressed air, or an approved alternate method.

7. The drilling fluid used in conventional mud rotary drilling shall conform to standard accepted well drilling practice for water wells as approved by the ENGINEER. Mixing of any additives shall be performed with a standard jet type mixer or as approved by the ENGINEER. All drilling water shall be disinfected with chlorine, which shall be added to the water tank before each refilling in a quantity such that a concentration of 50-100 ppm of chlorine is obtained in all of the water.

8. If conventional air rotary drilling is used, unconsolidated or semi-consolidated formations may cave if not supported during the drilling with casing or drilling fluid. The CONTRACTOR shall use drilling equipment and methods which will minimize caving, where necessary.

3.02 CASING

A. Install the sizes stated on the bid schedule.

B. Install casing in wells to a depth appropriate for the formation type and minimum yield specified.

C. Connect casing lengths with either screwed couplings or approved welds.

1. Keep surfaces to be welded free from local scale, rust, grease, paint and other foreign materials.

2. The technique of welding employed, the appearance and quality of the welds made, and the methods of correcting defective work shall conform to normally accepted standards of workmanship.

3. Ends to be welded shall be factory cut and beveled.

4. All field cut ends must be approved by the Project Engineer.

5. Welding will not be allowed when the base metal temperature is below 0 degrees Fahrenheit.

6. Heat areas within 3 inches of the weld when the base metal temperature is between 0 and 32 degrees Fahrenheit.

7. Casing sections having twists, bends, offsets, and openings will not be accepted.

8. Make all joints watertight.

D. If the top of the casing is torch cut, grind all rough surfaces smooth.

E. Plumbness and Alignment

1. Conduct a straightness and alignment test on all wells after casing in accordance with the Acceptance section.

a. No payment will be made for testing procedure or materials.

3.03 SAMPLING OF FORMATION

A. Sampling is considered an essential part of this contract.

B. Samples of the formation shall be taken as described in the following paragraphs.

1. Samples shall not be washed and shall be kept in cloth bags.

2. Samples shall be properly marked with well number, location, date and depth.

3. These samples shall be furnished to the Project Engineer as drilling progresses.

4. Rotary Drilling: The contractor shall keep an accurate record of the location of the top and bottom of each stratum penetrated, and the elevation to which the water level stabilizes, as each water bearing stratum is encountered. The contractor shall place and save in cloth bags samples taken from each 10 feet of drilling, and at every change in formation. If so directed by the Project Engineer, the driller may be required to take samples at 1-foot intervals in a potential aquifer.

3.04 SCREEN INSTALLATION

A. Select appropriate slot size for well screen based on formations encountered during test well construction.

B. A well screen shall be installed. If the estimated quantity of screen is found to be insufficient, payment shall be negotiated between the contractor and the Owner

C. Install well screens in unconsolidated formations, after sufficient yield is obtained from the water bearing formation in accordance with state and local codes at the depths and lengths approved by the Project Engineer.

D. Fill the drill hole with approved material, such as bentonite with fine sand seal, if the bottom of the drilled well is deeper than the screened area. Sand seal shall be a minimum of 3 feet thick.

E. The well screen openings shall be of the proper width to permit the maximum practical sand free yield after development. The openings shall be of a geometric shape to permit maximum transmitting capacity without clogging or jamming.

F. A sieve analysis of a representative sample of the water bearing formation is required by the Project Engineer to verify proper sizing.

G. Acceptable methods for installing stainless steel well screens:

1. Pull back method

a. Provided the formations in the hole are not subject to collapse and bind around the pipe. A different method shall be used subject to the approval of the Project Engineer if the formation has a tendency to collapse.

b. Provide a 1 1/2-foot section of riser pipe and neoprene type packer

2. Open hole method.

3. Bail down method.

4. Wash down method.

5. Welding the screen to the casing.

H. If it is necessary to join several screens together, the joints connecting the screen sections shall be butt-type couplings of the same materials as the screens.

I. If the screen is not welded securely to the casing, the screen shall be provided with a 1 1/2-foot section of riser pipe and a neoprene type packer, which shall be securely installed in the casing

J. The Project Engineer must approve all other methods.

K. Fill the drill hole with approved material if the bottom is deeper than the screened area.

L. Water samples may be required prior to development and test pumping for the purpose of a preliminary chemical analysis.

1. Pump or bail well until a suitably clear sample can be obtained.

3.05 WELL DEVELOPMENT

A. The contractor shall develop the well by such methods as will effectively extract from the water bearing formation the maximum practical quantity of drilling mud, fine sand, silt or other fine materials. Development shall bring the well to a maximum yield per foot of draw-down, and the water shall be sand free at the maximum pumping rate.

B. Develop the well using a method that extracts the maximum practical quantity of drilling material, fine sand, silt or other fine material.

1. Maximum allowable sands and fine material: 2 ppm (by weight).

C. The Project Engineer shall approve the development method used by the contractor prior to initiation of the work.

D. Development shall not be considered as test pumping. Checking an aquifer for yield shall not be considered to be development time.

E. Acceptable development methods include surge plungers, compressed air or high velocity jetting.

1. Bailing or pumping is not acceptable.

2. Compressed air must be delivered at a minimum rate of 75 cfm at a minimum pressure of 100 psi.

F. Conduct development so as to prevent settlement of the stratum above the water bearing formation.

G. High velocity jetting with phosphates may be required.

1. Follow established procedures for this type of development.

2. If this item is not included in the bid schedule and the Project Engineer requires the contractor to utilize this method of development a unit price for the work shall be negotiated between the contracting officer and the contractor.

3.06 GROUTING

A. Method of grout placement must specify forcing grout under pressure from the bottom of the annular space toward the surface.

B. Grouting shall be completed continuously and in a manner that will insure the filling of the entire annular space with grout in a single operation.

C. The mixture, method of mixing, and consistency shall be approved by the Project Engineer before grouting of the wells.

D. Minimum thickness of grout seal of 1 1/2 inches shall be maintained between well casing and the drill hole for the entire length of casing to be grouted.

E. Fill annular space between casing and drill hole with cement grout from the top of the production zone to a depth of 18 feet below surface.

1. State well codes may require additional grout depth.

2. At the direction of the Project Engineer the depth of grouting may be increased where necessary to provide increased protection of the water supply.

3. In the case of a well in a sandstone formation the annular space between the casing and drill hole shall be filled with cement grout in accordance with applicable State requirements.

4. Where a bore hole larger than the outside diameter of the casing has been drilled below the depth to which the casing is to be grouted, the lower part of the hole shall also be backfilled with cement grout, or other material approved by the

Project Engineer. No payment shall be made for the cement grout or backfill used for this purpose.

A. Grout shall be placed in the entire annual spacing of the well in one continuous placement.

B. Use temporary casing where necessary to ensure minimum thickness of grout. This casing shall be withdrawn as the grout is placed. Temporary casing will not be left in place.

C. No work on the well will be allowed within 72 hours after completion of grouting.

D. If quickset grout is used this period may be reduced to 24 hours if approved by the

Project Engineer.

3.07 TESTING FOR YIELD AND DRAWDOWN

E. Contact Project Engineer two working days prior to the start of test pumping.

F. Provide all necessary labor, equipment, materials and power required for test pumping.

1. Supply measuring equipment to determine water levels and the rate of pump discharge to the nearest 0.1-foot and 1 gpm.

2. Equipment considered suitable are electrical probes, or airline for well level measurements; and an orifice meter, weir or a calibrated water meter for flow measurement.

3. Provide all piping necessary to convey water away from test pump site.

G. Test pump well at 350 gpm unless otherwise directed.

H. Utilize a pump that can be removed from the well after the completion of the test pumping operation.

I. Duration of drawdown test: twenty two hours, unless otherwise directed by the Project Engineer.

1. Take drawdown and pump discharge measurements every 1 minute for the first ten minutes.

2. Take drawdown and pump discharge measurements every 5 minutes for the next ninety minutes.

3. Take drawdown and pump discharge measurements every 30 minutes for the remainder of the test.

J. Record recovery measurements immediately upon completion of test pump for one hour total, unless otherwise directed by the Project Engineer.

1. Take recovery readings every minute for the first 10 minutes.

2. Take recovery readings every 10 minutes for the next ninety minutes.

3. Take recovery readings every 30 minutes until well has recovered to within 5 feet of the original static water level.

4. The Project Engineer may require fewer recovery measurements.

K. If requested by the Project Engineer, take water samples for field chemical analysis test after test pumping but before grouting.

L. Remove all temporary-pumping facilities at the conclusion of test pumping.

M. Submit test pump results to the Project Engineer within 5 days of completion.

N. Checking an aquifer for yield shall not be considered to be development time.

3.08 DISINFECTION

A. Upon completion of test pumping and construction, thoroughly clean the well of all foreign material (i.e. cement, oil, grease, joint dope, scum, etc.)

B. Disinfect well with a chlorine solution, chlorine bleach, sodium hypochlorite or calcium hypochlorite solution. Chlorine compounds having additives may not be used.

1. Prepare solution prior to injection into well.

2. Mix volume and strength such that a minimum concentration of 100 ppm of free residual chlorine is obtained in all parts of the well for a minimum of 8 hours after injection.

3. Flush casing above static water level with solution.

4. After completion of disinfection procedures the well shall be thoroughly flushed and a bacteriological water sample shall be taken and submitted to verify that disinfection procedures were successful.

3.09 CHEMICAL AND BACTERIOLOGICAL ANALYSIS

A. Take bacteriological samples immediately after disinfection and flushing of the test well.

B. Submit bacteriological samples to a WA State Department of Health approved lab.

1. Provide copy of results within 10 days of receipt of the report.

2. If a sample tests positive, notify Project Engineer immediately and repeat chlorination of the well until a sample tests negative.

C. The contractor shall furnish to the Project Engineer a chemical analysis of the water for each drilled or renovated well. Copies of the results must be provided within 10 days of receipt.

D. The contractor shall be responsible for furnishing the required size, preservative and number of containers, collecting the water sample, arranging for the chemical analysis to be performed at a laboratory that is state or EPA certified and furnishing the results to the Project Engineer. In addition, the lab must be certified in each of the specified EPA methods for the chemicals being tested.

E. The following is a list of most of the parameters to be analyzed, however, the entire list of parameters to be measured must meet the current National Primary Drinking Water Standards list determined by the U.S. E.P.A.

Inorganic Chemicals (IOCs)

1. Antimony

2. Arsenic

3. Asbestos

4. Barium

5. Beryllium (total)

6. Cadmium

7. Chromium (total)

8. Copper

9. Cyanide (as free cyanide)

10. Fluoride

11. Mercury (inorganic)\

12. Nitrate (measured as Nitrogen)

13. Nitrite (measured as Nitrogen)

14. Selenium

15. Thallium

Organic Chemicals (SOCs)

16. Acrylamide

17. Alachlor

18. Atrazine

19. Benzene

20. Benzo(a)pyrene (PAHs)

21. Carbofuran

22. Carbon tetrachloride

23. Chlorodane

24. Chlorobenzene

25. 2,4-D

26. Dalapon

27. 1,2-Dibromo-3-chloropropane (DBCP)

28. o-Dichlorobenzene

29. p-Dichlorobenzene

30. 1,2-Dichloroethane

31. 1,1- Dichloroethylene

32. cis-1,2-Dichloroethylene

33. trans-1,2-Dichloroethylene

34. Dichloromethane

35. 1,2-Dichloropropane

36. Di(2-ethylhexyl) adipate

37. Di(2-ehtylhexyl) phthalate

38. Dinoseb

39. Dioxin (2,3,7,8-TCDD)

40. Diquat

41. Endothall

42. Endrin

43. Epicholorohydrin

44. Ethylbenzene

45. Ethylene dibromide

46. Glyphosate

47. Heptachlor

48. Heptachlor epoxide

49. Hexachlorobenzene

50. Hexachlorocyclopentadiene

51. Lindane

52. Methoxychlor

53. Oxamyl (Vydate)

54. Pentachlorophenol

55. Picloram

56. Polychlorinated biphenyls (PCBs)

57. Simazine

58. Styrene

59. Tetrachloroethylene

60. Toluene

61. Toxaphene

62. 2,4,5-TP (Silvex)

63. 1,2,4-Trichlorobenzene

64. 1,1,1-Trichloroethane

65. 1,1,2-Trichloroethane

66. Trichloroethylene

67. Vinyl Chloride

68. Xylenes (total)

Radionuclides

1. Alpha/photon emitters

2. Beta photon emitters

3. Gross alpha, including Uranium

4. Radium 226 and Radium 228 (combined)

5. Uranium

Microorganisms

1. E. Coli

2. Fecal coliform

3. Total Coliforms

Secondary Contaminants

1. Alkalinity

2. Aluminum

3. Chloride

4. Color

5. Corrosivity

6. Fluoride

7. Iron

8. Manganese

9. pH

10. Silver 11.Sulfate 12.Total Dissolved Solids 13.Zinc

Other Analysis

1. Total Organic Carbon (TOC)

2. Volatile Organics (VOCs)

F. Submit chemical analysis results to Project Engineer within 30 days of completion of test pumping.

3.10 CAPPING

A. Install approved well cap in accordance with manufacturer’s recommendations to be water tight and secured to casing to prevent unauthorized removal.

3.11 WELL LOG AND RECORDS

A. The contractor shall keep a log of each hole drilled under these specifications recording:

1. Well number, location and site number.

2. Location of the well by 1/4 section, range and township.

3. Depth, thickness, type, general characteristics and drilling characteristics of each material encountered.

4. Size, type, and length of the well casing installed.

5. Well screen size, material, length, manufacturer, connections and fittings.

6. Test pumping data.

7. Pump equipment, pitless adapter, and drop pipe.

8. Method and date of bacteriological sampling.

B. Each log shall be kept carefully and accurately with entries made in sequence so that each can be correlated with the depth of hole at the time. It shall be brought up to date at the end of each working day and shall be furnished to the Project Engineer within one week after the performance of all work on the well, whether completed or abandoned.

C. The driller shall also file an official construction report with the state agency designated to handle them in the particular state in which the well is located and provide the Project Engineer with a copy of the log and evidence of submittal within thirty days after well is completed.

The contractor shall upon the completion, disinfection and flushing of each well collect and submit a bacteriological sample to the state health department laboratory for analysis. The contractor shall provide the Project Engineer with a copy of the laboratory analysis report within ten days of the contractor’s receipt of the report except when the sample is unsafe in which case the Project Engineer shall be notified immediately. If a positive sample is analyzed the contractor will be required to chlorinate the well until a negative sample is obtained and analyzed.

3.12 UNACCEPTED DRILLED WELLS

A. Drilled wells will not be accepted due to unsatisfactory bacteriological quality, poor alignment, or loss of tools.

B. Obtain Project Engineer’s approval prior to abandoning wells.

C. Well abandonment shall be in accordance with WA State Regulations

END OF SECTION 02520

All other terms and conditions remain unchanged. The proposal due date IS EXTENDED as a result of this Amendment.