Attachment_1_-_Devils_Elbow_and_Clarks_Bay_Well_Improvements_Specifications.pdf

TABLE OF CONTENTS

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TABLE OF CONTENTS – Page 1 of 1

Devil’s Elbow and Clark’s Bay Well Specifications

01009 - General Information and Requirements ......................................................................................... 1-3 02221 - Trench Excavation .......................................................................................................................... 1-9 02672 - Well Drilling and Casing .............................................................................................................. 1-10 02673 - Well Finalization ............................................................................................................................ 1-5 15060 – Pump House Pipe, Fittings, and Appurtenances ............................................................................ 1-4 15860 - Submersible Well Pump and Accessories ...................................................................................... 1-6 16055 - Common Work Results for Electrical ............................................................................................ 1-5 Administrative Rules of Montana (ARM) ................................................................................................ 1-18

SECTION-01009-1

GENERAL INFORMATION AND REQUIREMENTS

SECTION – 01009

PART 1: GENERAL

1.01 SUMMARY:

A. Description of Work: Furnishing labor, equipment, supplies, and materials, to drill one water well, trench and backfill new utility lines, replace and install new water system fittings, install a new submersible pump and controls, and abandon two existing wells.

B. Location: Work under this contract is located at Clark’s Bay Day Use Area located in

Lewis and Clark County, Montana. The work locations are shown on the drawings.

C. Terminology: References to “Engineer” means BLM Engineer (406-329-1021), which will serve as the Contracting Officer Representative during construction. References to “Government” means the Bureau of Land Management (BLM).

1.02 REFERENCES:

A. Referenced Specifications/Standards with Abbreviations and/or Acronyms: Wherever the following acronyms are used in these specifications or on the drawings, they are to be construed the same as the respective expressions represented. Copies of the referenced specifications/standards referred to herein may be procured by the Contractor, from the following:

ARM Administrative Rules of Montana (Referenced ARM’s are attached to this specification section) Administrative Rules Services P.O. Box 202801 Helena, MT 59620-2801

ASTM American Society for Testing and Materials 100 Barr Harbor Drive P.O. Box C700 West Conshohocken, PA 19428-2959

NSF National Sanitation Foundation 789 N. Dixboro Road P.O. Box 130140 Ann Arbor, MI 48105

AWWA American Water Works Association 6666 West Quincy Avenue Denver, CO 80235

1.03 SUBMITTALS:

A. Scope: Submittals include manufacturers' literature, work schedules and substitution requests.

B. Requirements: Refer to specifications for submittals required. Allow at least 3 working days for review. Submittals shall be delivered to the Engineer and the Government at the

SECTION-01009-2

Pre-work Conference.

C. Identification of Submittals: Completely identify each submittal by showing at least the following information:

1. Name and address of submitter, plus name and telephone number of the individual to contact for further information.

2. Name of project as it appears in these specifications.

1.04 QUALITY ASSURANCE:

A. Codes and Standards: The work shall comply with codes and standards applicable to each type of work and as listed in the individual sections of these specifications. This contract incorporates materials, applications, and tests by reference, with the same force and effect as when they were given in full text.

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

1.05 DELIVERY, STORAGE, AND HANDLING:

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

B. Storage: The Contractor shall provide temporary storage facilities for products complying with manufacturer's recommendations which will protect them from damage until installation on the project and final acceptance. The storage area shall permit access for inspection and handling.

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

1.06 SITE CONDITIONS:

A. Environmental Considerations: Operations of the Contractor upon government premises including storage of materials, camping areas and equipment parking shall be confined to areas approved by the Government.

B. Noxious Weeds: The Contractor must wash all heavy equipment and vehicles prior to accessing BLM lands to prevent the spread of noxious weeds. Equipment or vehicles with visible dirt or plant parts will not be allowed into the project area until they are cleaned to the satisfaction of the Government.

1.07 SEQUENCING AND SCHEDULING:

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

Base Bid Line Items

a. Well Drilling Operations

SECTION-01009-3

i. Contractor will have 180 days from the notice to proceed date to perform all well drilling, water quality, and yield testing requirements

b. Backflow Preventor Installation at Clark’s Bay

i. Contractor will have 30 days from the notice to proceed date to install a new backflow preventor and all associated plumbing in the Clark’s Bay Pumproom as indicated on sheet 6 of the plans.

Optional Bid Line Items

a. All optional bid line items will be contingent on the water quality and yield testing results from the well drilling operations. The government will notify the contractor within 45 days of the finalization of these results if they plan to move forward with the optional bid items. If the optional bid items are awarded the contractor will have an additional 90 days to perform the work from the notice to proceed date.

PART 2: PRODUCTS

(There are no applicable requirements.)

PART 3: EXECUTION

3.01 PROJECT MEETINGS:

A. Pre-Work Conference:

1. Notification: A pre-work conference will be held prior to the start of work. The Contractor will be notified in advance of meeting time, date, and place.

The purpose will be to review required work, project drawings and specifications, construction schedules, payroll and payments, and administrative provisions of the contract.

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

3. Presentation: The Contractor shall be prepared to summarize and explain procedures planned for the project and present the submittals requested in the specifications.

B. Progress Meetings:

1. Location: Meeting shall be held at the project site, or as determined by the Engineer and Government.

2. Notification: Meetings may be called by either the Government, the Engineer, or the

Contractor. Request shall state who should attend.

C. Final Inspection:

1. Location: Meeting shall be held at the project site, or as determined by the Engineer or Government.

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

SECTION-01009-4

PART 4: MEASUREMENT AND PAYMENT

4.01 METHOD OF MEASUREMENT:

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

4.02 BASIS OF PAYMENT:

A. Payment: No direct payment for the work described under this section will be made. The

Contractor shall include consideration for this item in the bid price for other items of the contract.

Section 02221

TRENCH EXCAVATION AND BACKFILL

FOR PIPELINES & APPURTENANT STRUCTURES

SECTION 02221

TRENCH EXCAVATION AND BACKFILL

FOR PIPELINES & APPURTENANT STRUCTURES

PART 1: GENERAL

1.1 DESCRIPTION

A. This work is the excavation, trenching and backfilling for pipelines and appurtenances. It includes all clearing, grubbing, site preparation, removal, and disposal of debris from the excavation, handling and storing materials for fill and backfill, all bracing, shoring and trench protection, construction dewatering, all backfill, subgrade preparation, final grading, site dressing and cleanup.

1.2 REFERENCES

A. The current publications listed below form a part of this specification.

AASHTO T99 Moisture-Density Relations of Soils and Soil-Aggregate Mixtures Using 5-lb (2.5kg) Rammer and 12-inch (305mm) Drop

ASTM D698 Moisture-Density Relations of Soils and Soil-Aggregate Mixtures Using 5-lb (2.5kg) Rammer and 12-inch (305mm) Drop

AASHTO T191 Density of Soil In-Place by the Sand-Cone Method

(ASTM D1556)

AASHTO T238 (Density of Soil and Soil-Aggregate In-Place by Nuclear ASTM D2922) Methods (Shallow Depth)

AASHTO T239 Moisture Content of Soil and Soil-Aggregate In-Place by (ASTM D3017) Nuclear Methods (Shallow Depth)

AASHTO T11 Materials Finer Than 75mm (No. 200) Sieve in Mineral (ASTM C117) Aggregates by Washing

AASHTO T27 Sieve Analysis of Fine and Coarse Aggregate

(ASTM C136)

AASHTO T89 Determining the Liquid Limit of Soils

AASHTO T90 Determining the Plastic Limit and Plasticity Index of Soils

ASTM D4318 Test Method for Liquid Limit, Plastic Limit and Plasticity Index of Soils

FOR PIPELINES & APPURTENANT STRUCTURES

1.3 STANDARD DRAWINGS

A. Standard Drawings applicable to this section are as follows:

1. See details on Construction Plans.

1.4 TESTING

A. Field Density Testing

1. In-place field density tests for quality assurance are at the Government’s expense. Quality assurance field density testing frequency shall be at the Contracting Officer’s discretion.

B. Materials Submittals

1. Submit to the Contracting Officer Type 1 Bedding gradation and plasticity index.

PART 2: PRODUCTS

2.1 PIPE BEDDING MATERIALS

A. TYPE 1 PIPE BEDDING

1. Type 1 Pipe Bedding includes the material placed from 4 inches (100mm) below the bottom of the pipe, around the pipe, and up to 6 inches above the pipe.

2. Provide Type 1 Bedding consisting of sand, sandy gravel, or fine gravel having a maximum 3/4-inch size (19mm) and a maximum plasticity index of 6, determined by AASHTO T89 and T90 or by ASTM D4318.

3. Where trench excavation encounters wet or unstable material, Type 1 Pipe Bedding must be free draining and non-plastic.

2.2 TRENCH BACKFILL MATERIALS

A. Materials From Trench Excavations

1. Backfill material obtained from trench excavations must be free of cinders, ash, refuse, organic or frozen material, boulders, or other deleterious materials. Backfill materials and placement are further described in the execution Section of this specification.

2.3 DETECTABLE BURIED WARNING TAPE

FOR PIPELINES & APPURTENANT STRUCTURES

A. Detectable buried warning tape is to have a minimum 6 inch (15cm) width and 5 mil (0.12mm) thickness and a solid aluminum core running the full length and width of the tape enclosed in a color coded inert plastic jacket, impervious to alkalis, chemical reagents and solvents in the soil. The tape is to meet APWA/ULCC Color Code requirements and is to have a maximum 36 inch (90cm) imprint. For this project the tape should be blue with text that reads as “Water Line Below”.

PART 3: EXECUTION

3.1 PROTECTION OF EXISTING PROPERTIES

A General

1. Take precautions to protect all adjoining private and public property and facilities, including underground and overhead utilities, curbs, sidewalks, driveways, structures, and fences. Restore or replace all disturbed or damaged facilities to its original condition at Contractor’s expense.

The Contractor will take necessary steps and precautions to keep trenching widths to a minimum and provide the necessary shoring required to protect adjacent buried utilities.

2. Contact utility owners using the Montana One Call System for utility locates before starting work. The Contractor is also responsible for ensuring that all private utilities are located within the work area. Protect the utilities exposed during the work and prevent damaging underground utilities adjacent to excavations. Immediately notify the utility owner of any construction damage. Repairs of damage to marked utilities are at the expense of the Contractor.

3. Cut and replace existing service lines interfering with trenching operations only with the Contracting Officer’s permission and at the Contractor’s expense. Show all repaired and/or adjusted service lines on the As-Built Plans.

4. Protect existing water and sewer mains and water and sewer services from freezing at all times during construction.

B. Existing Structures

1. Prevent damage to existing buildings or structures in the work area. Repair all construction related damage to the satisfaction of the Government.

C. Existing Overhead Utilities

FOR PIPELINES & APPURTENANT STRUCTURES

1. Use extreme caution to avoid conflict, contact or damage to overhead utilities during the work.

D. Exploratory Excavation

1. The location of existing buried public and private utilities may need to be verified by exploratory excavation before construction.

2. Exercise care to prevent damaging all utilities and repair any utility damage caused by exploratory excavation.

E. When excavating across existing gravel surfacing or other developed surfaces, remove the surfacing material full depth and stockpile for reuse at the top of the trench or legally dispose of the surfacing material.

F. When excavating across cultivated or sodded areas, remove topsoil full depth or to a maximum 12-inch (30cm) depth, whichever is less, and stockpile for reuse at the top of the trench.

3.2. MAINTENANCE OF FLOWS

A. Maintain the flow of sewers, drains and water courses encountered during construction. Restore culverts, ditches, fences, crosswalks and structures disturbed by construction to their original condition upon completion of the work.

3.3 TRENCH EXCAVATION

A. General

1. Meet current OSHA Safety and Health Standards for all excavation, trenching, shoring, and related work.

2. Excavate at the specified locations for pipeline installations and appurtenant structures.

3. During excavation, stockpile backfill materials away from the trench banks to assure trench wall stability. Stockpile excavated materials on only one side of the trench without obstructing existing valves and other appurtenances. Assure surface drainage of adjoining areas is unobstructed.

4. Remove and dispose of all excess or unsuitable excavated materials on-site as directed by the Contracting Officer.

5. Prevent surface water from flowing into excavations. Promptly remove all water accumulating in trench excavations. Do not permit water to accumulate in any open trench. Remove and re-lay all pipe out of alignment or grade caused by trench flooding.

FOR PIPELINES & APPURTENANT STRUCTURES

6. Grade the trench bottoms to the specified lines and grades. Assure bedding material provides uniform bearing and support for the pipe along its entire length. Excavate for joints after the trench bedding is graded, limiting the excavation to the required length, depth and width for making the particular type of joint used. Backfill over-excavations with Type 1 Bedding Material.

7. No differentiation between common and rock trench excavation is made, except when listed as separate bid items on the bid proposal or bid form.

Excavation includes removing and subsequent handling of all earth, gravel, bedrock or other material encountered regardless of the type, character, composition or condition of the material.

8. The use of trench digging machinery is permitted, except in places where its operation is likely to cause damage to existing structures or features, in which case hand methods are to be employed.

B. Trench Dimensions

1. Excavate to the trench dimensions specified below.

2. Width.

a. Excavate to provide room to install and join the pipe as specified.

The minimum trench width is 2'-0" in areas where the bury depth is 2’0”. Minimum trench width in other areas is 3’-6”. Maximum trench width may be specified in the contract documents.

3. Depth.

a. Excavate the trench as required for the invert grade or pipe bury as specified in the contract documents, plus 4 inches (10cm) for the Type 1 Pipe Bedding. If bedrock, boulders or large stones are encountered at the bottom of the trench, excavate at least 6 inches (15cm) below the bottom of the pipe for backfilling with Type 1 Pipe Bedding.

C. Pavement Damage Caused by Equipment

1. Equip all track mounted equipment operated on pavement surfacing with pads to prevent pavement damage.

2. Restore all pavement damaged by construction to its original condition.

D. Shoring, Bracing and Sheeting

FOR PIPELINES & APPURTENANT STRUCTURES

1. Provide all shoring, bracing and tight sheeting required to prevent caving and protect workers, meeting current Occupational Safety and Health Act Requirements, and to protect adjacent property and structures. The cost of this work is included in the cost for trench excavation.

E. Excavations for Appurtenances

1. Make excavations for structures and other appurtenances of the size and depth to permit compacting of backfill on all sides to the specified density.

The requirements for removing water and other applicable portions of these specifications apply to excavation for appurtenances.

3.4 DEWATERING

A. Remove all ground water encountered in trench excavations. Do not place pipe, bedding or backfill materials below the groundwater elevation established by dewatering operations. The cost of dewatering operations is considered a part of the excavation cost.

3.5 EXCAVATION STABILITY AND SAFETY

A. The stability of construction excavations and associated worker safety, including slope geometry and shoring/bracing considerations, are the responsibility of the Contractor. Meet current OSHA regulations.

3.6 TRENCH FILLING AND BACKFILLING

A. General

1. Backfill all trenches as specified immediately after grade, alignment and pipe jointing has been inspected and approved by the Contracting Officer.

Conduct any pipe testing as specified in the respective water distribution sections. Correct all defects discovered by tests prior to backfilling.

B. Pipe Bedding Placement

1. Type 1 Bedding.

a. Place Type 1 Pipe Bedding material 4 inches (10cm) under the pipe, around the pipe, and up to 6 inches above the pipe. Place in maximum lifts of 6 inches (15cm), using hand or other compaction methods without damaging or disturbing the pipe. Thoroughly compact each layer. Use special care to assure compaction under the pipe haunches.

FOR PIPELINES & APPURTENANT STRUCTURES

b. Place backfill material in equal lifts on both sides of the pipe for the full trench width. Take care to prevent migration of Type 1 Bedding into surrounding soils during placement and compaction.

C. Trench Backfill.

1. After the pipe bedding materials are placed and compacted as specified, backfill the trench. Use backfill material free of cinders, ash, refuse, organic or frozen material, boulders, or other deleterious materials. From the top of the Select Type 1 Pipe Bedding to 6 inches (15cm) below the ground surface, or the subgrade elevation, material containing rock up to 8 inches (20cm) in the greatest dimension may be used.

2. Watering

a. Apply uncontaminated water, when required, at the locations and in the amounts required to compact the backfill material to the specified requirements. Maintain an adequate water supply during the work. Assure the equipment used for watering is of the capacity and design to provide uniform water application.

b. Apply water during the work to control dust and to maintain all embankment and base courses in a damp condition in accordance with these contract documents.

3. Remove, replace, and re-compact backfill in trenches where settlement has occurred as directed by the Contracting Officer at the contractor’s expense.

4. Place trench backfill in maximum 8 inch compacted lifts within 3 percent of optimum moisture content, and compact to at least 95 percent of maximum dry density determined by AASHTO T99 or by ASTM D698.

D. Backfill for Appurtenances

1. Place and compact backfill for appurtenances to finished grade around valve boxes and other underground items without disturbing appurtenance alignments.

2. Meet the backfill material, placement, and compaction requirements specified for the adjoining trench.

E. Detectable Buried Warning Tape

1. Provide warning tape as described in PRODUCTS Section 2.3. Bury tape a maximum 8 inches below finish surface grade.

FOR PIPELINES & APPURTENANT STRUCTURES

3.7 SURVEY MARKERS AND MONUMENTS

A. Protect all survey markers and monuments. Protection includes marking with flagged high lath and supervising work near markers and monuments. Do not disturb monuments without prior approval from the Contracting Officer.

B. Replace all Contractor disturbed or destroyed survey markers or monuments, not approved during construction, using a licensed land surveyor.

3.8 CLEANUP

A. As work progresses, remove debris and complete to finish grade each portion of the work. Once the work is complete, clear debris and finish the entire site to smooth, uniform slopes presenting a neat and workmanlike appearance. Remove and dispose of all rocks brought to the surface during excavation or backfilling.

4.1 METHOD OF MEASUREMENT

A. Trenching, Backfilling and Compacting:

1. The work described in this section for trenching, backfilling and compacting will be measured and paid for by the linear foot as measured along the ground surface over the completed utility trench. The work will include all labor, equipment, tools and incidentals necessary for excavation, backfill and compaction.

B. Imported Bedding Material:

1. Bedding material will be measured by the loose cubic yard furnished and placed around utility piping in trenches. The work will include all labor, equipment, tools, hauling and incidentals. Determination of quantities shall be as follows:

a. Loose material hauled shall be weighed at a certified scale and tickets given to the Contracting Officer.

b. Loose material hauled shall then be divided by the wet density of the material to obtain the loose cubic yards delivered.

4.2 BASIS OF PAYMENT

A. Payment: Prices and payment will be full compensation for the work described in this section. Payment will be made under:

FOR PIPELINES & APPURTENANT STRUCTURES

Pay Item Pay Unit 02221 (1) Trenching Backfilling and Compacting Linear Foot 02221 (2) Imported Bedding Material Cubic Yard

END OF SECTION 02221

SECTION MT-02665

WATER SYSTEMS

Section 02665

A. Section Includes: Furnishing labor, equipment, supplies, and materials, to replace the water lines going from the new well to the pump room as shown on the drawings and specified herein.

A. American Society for Testing and Materials:

ASTM A 53 REV A-89 Pipe, Steel, Black and Hot-Dipped Zinc-Coated Welded and Seamless

ASTM D 1784-81 Rigid Poly (Vinyl Chloride) (PVC) Compounds and Chlorinated Poly (Vinyl Chloride) (CPVC) Compounds

ASTM D 1785-89 Poly (Vinyl Chloride) (PVC) Plastic Pipe, Schedules 40, 80, and 120.

ASTM D 2241-89 Poly (Vinyl Chloride) (PVC) Pressure-Rated Pipe (SDR Series) ASTM D 2466-89 Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40 ASTM D 2467-89 Socket-Type Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 80 ASTM D 2564-88 Solvent Cements for Poly (Vinyl Chloride) (PVC) Plastic Pipe and Fittings ASTM D 2672-89 Joints for IPS PVC Pipe Using Solvent Cement ASTM D 2774-72 Underground Installation of Thermoplastic Pressure Piping ®

1983) ASTM D 2855-83 Making Solvent-Cemented Joints with Poly (Vinyl Chloride)

(PVC) Pipe and Fittings ASTM F 656 REV A-89 Primers for Use in Solvent Cement Joints of Poly (Vinyl Chloride)

(PVC) Plastic Pipe and Fittings

B. National Sanitation Foundation (NSF).

C. American Wood Preserver's Association.

D. Uniform Federal Accessibility Standards (USAF).

1.03 SUBMITTALS:

A. Provide manufacturer’s specifications, parts lists, cut sheets, operating characteristics and maintenance manuals for all materials listed.

1.04 QUALITY ASSURANCE:

A. Failure Criteria: Not limited to the following:

1. Evidence of leakage

2. Evidence of breakage of pipe

3. Malfunctioning valves

4. Blockage of piping

5. Contamination of water, rendering it not potable

6. Pressure drop

7. Bury depth less than minimum shown on drawings.

B. Labeling Requirements: high density polyethylene (HDPE) pressure pipe plastic pipe and fittings shall carry the National Sanitation Foundation (NSF) seal of approval for potable water pipe.

1.05 DELIVERY, STORAGE, AND HANDLING:

A. Storage: Store materials and equipment according to the manufacturer's instructions. Store plastic piping under cover out of direct sunlight.

PART 2: PRODUCTS

2.01 MATERIALS:

A. Pipe and Fittings: Pipe size, type and ratings shall be as shown on the drawings or as specified. Fittings shall be the same size as the adjoining pipeline except where reducers are required to enter a valve body or reduce to another pipe size. Fitting pressure ratings shall be equal to or greater than the adjoining pipeline unless specified differently in these specifications or on the drawings. Pipe and fittings shall be manufactured of material approved by NSF for potable water systems.

1. HDPE Pipe: Shall conform to ASTM D3035 and ASTM F1055

B. Potable Water Service Lines: Shall be 2” HDPE 4710 DR-11-200 psi, or as specified in drawings.

C. Transition Fittings: Shall be HDPE 4710 DR-11-200 psi butt weld stainless threaded transition. No compression fitting.

D. Fittings: All nipples, tees, elbows, and adapter shall be the size specified on the drawings.

PART 3: EXECUTION

3.01 PREPARATION:

A. Clearing and Grubbing and Topsoil Removal: Shall be according to Section 02221 –

Trenching, Backfilling and Compacting.

B. Excavation and Backfill: Shall be according to Section 02221 - Trenching, Backfilling and Compacting.

C. Demolition: Contractor to demo the existing water lines, and waste off site. Underground pipe leading to the pump house to be abandoned when exposed during construction.

3.02 INSTALLATION:

A. General: No pipe shall be installed in water. Keep the interior of the pipe clean. The pipe shall not be covered until the pressure test has been approved. Ends of lines shall be capped leaving sufficient space for later removal.

1. Install piping at same slope as existing pipe.

2. Install piping free of sags and bends.

3. Locate groups of pipes parallel to each other, spaced to permit valve servicing.

5. Install fittings for changes in direction and branch connections.

B. HDPE: HDPE pipes shall be installed according to ASTM D 2774. Interior of the pipe shall be kept clean. The pipe shall not be covered until the pressure tests have been approved by the Government.

C. Pipeline Bedding: Shall be according to Section MT-02221 - Trenching, Backfilling and

Compacting.

H. Polyethylene (PE) Plastic Pipe and Tubing: Install according to ASTM D 2774 and manufacturer's written instructions.

1. Make fusion welded joints according to ASTM D 2657.

2. Make insert joints according to AWWA C 901.

3. Make flared joints according to ASTM D 3140.

3.03 FIELD QUALITY CONTROL:

A. General: It is the Contractor's responsibility to perform all required tests. The Contractor shall supply and temporarily install a pressure gauge on each portion of pipeline being tested, to monitor any pressure drop during the test. The four-hour tests, prior to backfill shall be performed immediately when a segment, as detailed by the Contractor's work schedule, is completed and flushed.

B. Testing Procedure: Tests shall be conducted as follows:

1. For the pressure test, the Contractor shall notify the Government 24 hours prior to testing. The Government must witness this test. Failure to notify the Government shall result in a repeat of the test even if that requires re-excavation of the portion being tested. The portion being tested shall be pressurized to the maximum operating pressure. Do not fill the pipe at a rate greater than 1 foot per second. The pressure shall be held for a minimum of 1 hour; then inspected for failure criteria. Correct deficiencies evident during the test and repeat the test until approved. After approval, the Contractor may complete backfilling.

C. Final Test: A final test shall be conducted on the total system after completion of backfilling. Pressurize the system in accordance with 3.03 B. The pressure shall be maintained for a period of 4 hours; then the system inspected for failure criteria.

All deficiencies evident shall be corrected and the test repeated until approved.

3.04 CLEANING:

A. Disinfection: Shall be according to DEQ Circular-3 requirements

PART 4: MEASUREMENT AND PAYMENT

4.01 METHOD OF MEASUREMENT:

A. Units: No payment shall be made until all pressure tests have been completed and approved.

1. Pipe Replacement Repairs: The work described in this section for the water system repairs, hydrant, installation, and pressure testing will be measured and paid for on a lump sum basis.

2. Disinfection of the water system will be measured for payment under Section MT-

02673(3) – Water Quality Sampling.

4.02 BASIS OF PAYMENT:

A. Payment: Prices and payment listed below will be full compensation for the work described in this section. Payment will be made under:

MT-02665(1) Waterline Replacement .......................................... .………. LF

END OF SECTION

Section 02672

WELL DRILLING AND CASING

SECTION 02672

A. Section Includes: Record keeping, drilling water wells and installing Contractor-furnished property in water wells in accordance with Montana Department of Environmental Quality (DEQ) Circular DEQ-3 Standards for Small Water Systems.

A. American Petroleum Institute:

API 5L 88 Specification for Line Pipe

B. Administrative Rules of Montana (ARM)

C. American Society for Testing and Materials:

ASTM A 53 Pipe, Steel, Black and Hot Dipped Zinc Coated Welded and Rev. A-89

Seamless ASTM D 98 87 Calcium Chloride

D. American Welding Society:

AWS A 5.1 81 Covered Carbon Steel Arc Welding Electrodes AWS D 10.11 87 Recommended Practices for Root Pass Welding of Pipe Without

Backing AWS D 10.12 89 Recommended Practices and Procedures for Welding Low Carbon Steel

Pipe

E. American Association of State Highway and Transportation Officials

AASHTO T 27-82 Sieve Analysis of Fine and Coarse Aggregate

F. DEQ Circular DEQ-3 Standards for Small Water Systems (Feb. 24, 2006 Edition).

G. National Sanitation Foundation (NSF).

1.03 GOVERNING STANDARDS:

A. A licensed water well contractor in accordance with Title 37, Chapter 43, MCA and Title 36, Chapter 21, ARM shall perform well construction.

B. Well construction shall meet all requirements of Title 36, Chapter 21, ARM. Bureau of Land Management will provide professional engineering construction inspection and certify the as-built drawings within 90 days of completion of the project.

C. Drilling fluids and additives shall be approved by the National Sanitation Foundation (NSF) or a similar ANSI accredited laboratory/organization.

1.04 SUBMITTALS:

A. General: Furnish written certification that the Contractor-furnished equipment and materials conforms to the requirements of this section. Submittals shall be according to Section 01009 - General Information and Requirements.

B. Records: Well logs and reports described in this section shall be furnished to the

Contracting Officer upon completion of the well.

1.05 SCHEDULING:

A. Drilling Program: The Contractor shall submit to the Contracting Officer and Government at the pre-work conference, for approval, a complete and practicable work schedule providing an orderly performance of the work and be in such form and detail as to show the following for each well:

1. Sequence of drilling operations.

2. The days of the week and month that work is to be performed.

3. The number and length of each shift per day. The length of a shift may be extended in the field as required to avoid interrupting a drilling and testing operation.

4. Bit size and type for drilling hole.

1.06 PROJECT/SITE CONDITIONS:

A. Well Depth and Material Quantities: Well depth and material quantities listed in the Bid

Schedule and Work Data Sheet are estimates. The final determination of depth and material quantities will be made in the field by the Contracting Officer and will depend on actual geological conditions encountered during the drilling operation. The Contracting Officer shall have the option of ordering abandonment of a well at any point during the drilling operation.

2.01 CONTRACTOR FURNISHED MATERIALS:

A. Casing: Materials specified and recommended shall be new and free from defects. No used or old material will be accepted. However, when necessary or desirable to use temporary casing, the temporary casing may be used casing, subject to the approval of the Contracting Officer.

Temporary casing for grouting or other well construction purposes shall be steel of adequate size to withstand structural loads imposed during installation and removal, and shall be clean and free of coatings or contamination.

B. Steel Casing: Steel casing shall be either seamless or electric-welded black steel pipe, with either welded or threaded and coupled joints conforming to ASTM A 53 Grade B, or line pipe conforming to API 5L, either Grade A or B. Casing must also conform with ARM

36.21.640. Each section of steel pipe casing shall be marked to show the diameter, standard number, weight, wall thickness, and United States manufacturer.

Permanent Steel Casing: Well casing shall be 8” nominal diameter minimum wall thickness of 0.280” (18.99 lb/ft). Casing shall have additional thickness and weight if in the Contractor’s opinion the minimum thickness is not considered sufficient to withstand anticipated driving and placement forces. Driven casing shall be equipped with a drive shoe in accordance with ARM 36.21.644. The lower well casing shall extend to a depth of approximately 300’ below ground surface and the bottom section of 8” casing shall be perforated.

C. Steel Casing Joints: Shall be watertight and may be either welded or threaded and coupled and conform to ARM 36.21.642. Welded joints shall have a full circumferential, three-pass, butt welds at all joints.

D. Sample Bags: Shall be furnished by the Contractor.

E. Granular Bentonite: NSF approved, non-toxic, high solids medium chip (3/8"), and # 16 with permeability’s of 0.000000001 cm/sec. WYO-Ben, Baroid, or American Colloid or approved equal.

F. Drilling Fluid Additives: Submit manufacturer's literature describing the properties of the additive, mix proportions, application methods if required for efficient circulation.

G. Well Screen: None.

H. Casing Perforation: Perforation slot size shall be recommended by the contractor, based on in-field cutting samples, and agreed upon by the contracting officer.

I. Casing Centralizers: Steel casing in the grouted zone shall be fitted with minimum 1/4 - inch thick steel casing centralizers in groups of 3 or 4 around the circumference of the casing and at 20 foot intervals or less to ensure centering of the casing in the borehole. These centralizers shall be in accordance with ARM 36.21.649. Centralizers shall be steel sized to fit the casing and the hole.

J. Packers: If packers are utilized, they shall be neoprene, double-lipped, and of neoprene or other construction that will not impart taste, odor, toxic substances, or bacterial contaminants to the water. Lead packers or components may not be used.

2.02 EQUIPMENT:

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

B. Drill Bits: Either a drag, button or tri cone may be used to drill the hole.

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

3.01: GENERAL

A. Well construction requirements as shown on the Drawings and described herein are general guidelines only, and may be adapted or modified as field hydrogeologic conditions warrant during the drilling process. Modifications of these requirements may be made by the Contractor only upon consultation with and concurrence from the Contracting Officer.

Final well construction details shall be documented by the Contractor as part of his/her well log submittal.

3.02: EQUIPMENT, CLEANING, AND PREPARATORY MEASURES

A. To minimize chances for introduction of contaminants or iron bacteria, all drill components and fixtures, casing, and “down hole” equipment shall be thoroughly cleaned of all soil residuals, and then pressure-washed with hot water prior to drilling. All of the preceding items shall also be fully rinsed with a 5% solution of household bleach, and that solution left to dry for at least 60 minutes before drilling.

B. Drilling shall be by air rotary drill method, unless otherwise authorized by the Contracting Officer.

3.03 WELL LOG AND SAMPLES:

A. Well Log: The Contractor shall keep a complete well log as required by State law and shall check formations and enter the results in the log for intervals not to exceed 10 feet. The well log and geological data recording must meet the requirements of ARM 36.21.667. The log of the well shall show material penetrated and full descriptive notes made of each stratum found by the drill and difficulties or unusual conditions met in drilling. Water-bearing strata shall be described in detail as to loose or compact material, color, and if gravel, whether it is water-worn or angular. The presence of clay shall be noted. The log must be kept up-to-date with the progress of the well drilling, and shall be available for inspection by the Contracting Officer during the drilling operations.

B. Samples: Take a cuttings sample at each apparent change in the materials penetrated, or every 10 feet, whichever is lesser. If drilling is proceeding beyond the estimated depth for the well, take samples at 5-foot intervals. Samples shall be placed on the ground in separate piles in sequential order, and the sampling depth noted for each sample. Samples shall be protected from disturbance. Retain samples for Contracting Officer's inspection until well construction is complete.

C. Information for State Filing: The Contractor shall be responsible for the preparation and submission of reports required of the driller by Montana State law. The Contractor shall furnish Contracting Officer with the well log and must complete the "Well Log Report," State of Montana Form 603. The Contracting Officer will submit the well log to the DEQ.

D. The Notice of Completion of Groundwater Development will be filed with the DNRC by the Contracting Officer.

3.04 INSTALLATION:

A. Drilling Options: The Contracting Officer must witness the installation of the casing and drilling/removal of materials. If results are favorable for completing the well based on water quality tests and preliminary yield tests, the Contracting Officer will consult with the Contractor on the final depth of the steel casing, quantities of material to be installed, and location of water bearing strata which are to be developed. All drilling methods used shall be in compliance with the Montana Board of Water Well Contractors latest edition.

1. Unconsolidated formation:

a. In drilled wells that penetrate an aquifer overlain by unconsolidated formations such as sand and gravel without significant clay beds, an unperforated well casing must extend at least one foot below the seasonal low water table.

b. If drilling is the method of construction, the annular space between the upper drill hole and the well casing must be kept at least one-half full with grout material throughout the driving of the permanent casing into the aquifer. After the permanent casing is set in its final position, the remaining annular space must be filled to land surface with appropriate grout material.

c. If the oversized drill hole is extended to the same depth as the permanent casing, a suitable bridge must be installed between the casing and the drill hole at a position directly above the producing aquifer. The remaining annular space must be completely filled and sealed to land surface with appropriate grout material. A suitable bridge is one that prevents the grout material from dropping into the producing formations and reducing the output of the well.

d. If temporary casing is used to maintain the oversized drill hole, the annular space must be kept full with appropriate grouting material as the temporary casing is being withdrawn.

e. In drilled wells that penetrate an unconsolidated aquifer overlain by clay or when at least 6 foot thick interbeds of clay are present within the unconsolidated material, the well casing must be terminated in such clay strata, provided that the casing be sealed in the same manner as required in the case of consolidated formations.

2. Consolidated formation: The upper 25 feet of the casing shall be grouted at a minimum. Place the grout to prevent surface water and other impurities from entering the well by infiltration along the surface and the casing. Install the grout from the bottom of the annulus toward the ground surface in a continuous operation. In drilled holes that penetrate an aquifer either within a consolidated or confining formation, grouting of the casing must conform with the following procedures:

a. The upper drill hole must be at least 4-inches greater in diameter than the permanent well casing and must extend from the land surface to at least three feet into sound, consolidated formation. The lower part of the casing must be sealed into the rock formation with grout. The remainder of the annular space to land surface must be filled with grouting material.

b. If temporary surface casing is used, this casing must be of sufficient diameter to conform to the upper drill hole. Withdrawal of the temporary casing must take place simultaneously with proper grouting of the annular space to the land surface.

B. Drilling Location: Drill the well at the location staked and agreed upon at the site.

C. Drilling Fluid Additives: The Contractor shall not use drilling fluid additives unless they have been approved by the Contracting Officer.

D. Drilling Depth: Estimated depth is shown on the Drawings. Actual depth will be determined in the field by the Contractor and the Contracting Officer and will depend on geological conditions encountered during the drilling operation.

E. Casing at the Wellhead: The permanent casing must be in accordance with ARM

36.21.647. The watertight casing shall extend at least 24 inches above the final ground elevation.

F. Stainless Steel Well Screen: None.

G. High Solids Bentonite: Install medium chip high solids bentonite a minimum of 25 feet below the undisturbed ground surface (measured to exclude any earth fill at the wellhead) as shown on the Drawings. Where casing centralizers preclude the use of chips, a high-solids bentonite-sand slurry, cement or neat cement should be used. Grouting shall comply with the requirements of ARM 36.21.654 through 36.21.660. Contractor may pour bentonite from the top and sound with a weighted line instead of using a tremie pipe. Thickness of grout shall be 2-inches minimum around the outside of the casing on all sides, including couplings. Prior to grouting through creviced or fractured formations, bentonite may be added to the annular opening. After grouting is applied, work on the well must be discontinued until the grout has properly set in accordance with ARM 36.21.654(1)(d).

Grout placement must be sufficient to achieve proper density or percent solids throughout the annular space and must be applied in accordance with ARM 36.21.634. The type of grout, quantity and method of placement must be reported on the well log.

H. Backfill: If in the process of locating water-bearing strata, the well was drilled deeper than needed, Contractor shall backfill well to the bottom of the lowest water-bearing strata with an impervious material if so ordered by Contracting Officer. Material must provide firm support for casing.

3.05 ABANDONMENT:

A. Abandonment Due to Contractors Actions: When the drilled well must be abandoned because of actions of the Contractor, including but not limited to lost tools, damaged well, misalignment, separation of the casing string, losses in yields of water, or other causes attributed to careless, poor, inefficient, or incompetent workmanship, the Contractor shall pull casing (if installed) that can be removed and fill the hole in accordance with ARM

36.21.670 through ARM 36.21.678 requirements. The Contractor shall then drill a new well within 20 feet of the original well at the Contractors expense. The location of the new well must be approved by the Contracting Officer.

B. Abandonment Due to Other Causes: When the well must be abandoned because of inadequate quantity or quality of the water, or for another reason not the fault of the Contractor, the Contractor shall pull the casing (if installed) that can be removed, and shall fill the hole with cement, puddled clay or other impervious earth material in accordance with ARM 36.21.670 through ARM 36.21.678 requirements. The order to abandon the well must be in writing from the Contracting Officer.

C. Abandonment of Existing Well: Existing well must be abandoned by Contractor and fill the hole in accordance with ARM 36.21.670 - ARM 36.21.678 requirements.

3.06 FIELD QUAILTY CONTROL:

A. Alignment:

1. The well shall be drilled vertically. The well shall be tested for plumbness and alignment by inserting a 5.75”O.D. submersible pump, or fabricated dummy facsimile thereof supported on 2” rigid pipe 20’ long. The pump or facsimile shall insert and remove freely the full depth of the well. If Contractor is not able to install the steel casing due to poor vertical alignment, the Contractor shall be responsible for correcting the deficiencies at no additional cost to the Government.

B. Preliminary Well Testing: The Contractor shall make a yield test, according to Section

02673-Well Finalization, on each water-bearing zone penetrated. Suspend drilling and immediately notify the Contracting Officer when the water yield is at least equal to the desired minimum yield shown on the Work Data Sheet. The Contracting Officer may then either stop drilling operations or order continuance of the drilling.

C. Final Yield Testing: Shall be in accordance with Section 02673-Well Finalization.

3.07 SANITARY PROTECTION OF WELL:

A. General: The Contractor shall protect the well during the construction period to prevent tampering or seepage of contaminated water, petroleum products, or other contaminants into the well from the ground surface. During drilling, a watertight temporary cap in accordance with ARM 36.21.661 shall be installed in the top of the casing whenever work is not occurring.

B. Grading: Slope the ground immediately surrounding the top of the well casing and install concrete pad with slope away from the well in all directions, as shown on the drawings.

C. Correcting Contamination: If the well becomes contaminated, or water with undesirable physical or chemical characteristics enters the well due to the neglect of the Contractor, corrective work including the supplying of casing, seals, sterilizing agents, or other materials as may be necessary to prevent contamination of the aquifers shall be performed at the Contractor's expense.

A. Units: Mobilization into the site and Mobilization out of the site will not be paid for separately. Contractor shall include consideration for such items in the bid price for other items of the Contract.

B. Units: Drilling the well hole will be measured from the ground surface to the bottom of the drilled hole and paid for per linear foot. Six inch steel casing will be measured and paid for per linear foot. Perforated six inch steel casing will also be paid for per linear foot.

Furnishing and installing bentonite grout will be measured and paid for per 50 pounds to the nearest 50 pounds. No separate measurement will be made for the casing centralizers, packers, drive shoes and the bottom plate utilized. Contractor shall include the cost of these items in the bid prices for other items of the Contract.

1. No payment will be made for over sizing the drill hole and using surfacing casing for a consolidated formation. If Contractor elects to use oversized surface casing, Contractor shall either pull casing or leave in place at ground level after well is developed. The 6 inch casing shall be 24 inches above final ground elevation.

Contractor shall include consideration for such items in the bid price for other items of the Contract.

C. Units: Well Abandonment:

1. No payment will be made for drilling, installing casing, removing casing, and plugging of a well abandoned due to Contractors actions.

2. Payment for pulling casing and filling the hole when the well is abandoned due to other causes will be measured and paid for by the hour to the nearest 1/4 hour.

3. Abandonment of the existing well per ARM 36.21.670 - ARM 36.21.678 requirements will be paid for under 02672(5) Well Abandonment

A. Payment: Prices and payment will be full compensation for the work described in this section. Payment will be made under:

Pay Item Pay Unit

02672(1) Drilling the Well Hole . . . . . . . . . . . .. . . . . . . . . . . .. . .. . .. . . . . . . . . . . . . Linear Foot 02672(2) 6 Inch Steel Casing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . ..Linear Foot 02672(3) 6 Inch Perforated Steel Casing. . . . . . . . .. . . . . .. . . . . . . . . . . .. . . . . . . . . Linear Foot 02672(4) Bentonite Grout . . . . . . . . . . . . . . . . . . .. .. . . . . . . . . . . . .. . . . . . . . . . . . ..Fifty Pounds 02672(5) Well Abandonment . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . .. . . . . . . . . . . Linear Foot

WORK DATA SHEET

for

SECTION 02672

Well

1. Estimated drilling depth: 300 feet

2. Estimated drilling hole size: Contractor Recommended

3. Drilling method…