s100047_attachments.docx

ATTACHMENTS

The following attachments are a part of this solicitation and any resulting.

J- 1 Wage Rate Decision No. MT100001, dated 4/09/2010, 8 pages.

NOTE: THIS PROJECT IS LOCATED IN ZONE 2.

J- 2 Specifications

Standard Specifications Division I – General Requirements Section 01010 – Summary of Work Section 01015 – Measurement and Payment Section 01300 - Submittals Section 01400 – Contractor Quality Control and Owner Quality Assurance Section 01700 – Contract Closeout Division 2 - Sitework Section 02221 – Trench Excavation and Backfill for Pipelines & Appurtenant Structures Section 02660 – Water Distribution Section 02661 – Meter Vault Plumbing

J- 3 Drawings (See Separate Document)

Water Main “B” Sta. 34+00 to Sta. 37+73, Water Service B-8, and Water Service

Re-Plumbed Post Hydrant Detail, Post Hydrant/Stop and Drain Removal Detail, and Post Tee Hydrant Detail Sheet 14

Wage Decision No. MT100001, dated 4/09/2010

TECHNICAL SPECIFICATIONS

FOR THE

BIG LARCH CAMPGROUND

WATER SYSTEM REHABILITATION

PROJECT

BIG LARCH CAMPGROUND

SEELEY LAKE, MONTANA

NOVEMBER 2009

PREPARED BY:

TABLE OF CONTENTS

DIVISION 1 – GENERAL REQUIREMENTS

DIVISION 2 – SITEWORK

SECTION 01010

SUMMARY OF WORK

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of contract, including Division 1 Specification Sections, apply to this section.

1.2 WORK COVERED BY CONTRACT DOCUMENTS

A. The project work generally includes the restoration of the Big Larch Campground Water Distribution System. This work includes the following:

1.3 CONTRACTOR USE OF PREMISES

A. General: During the construction period, the Contractor shall have full use of the campground area.

B. Waste Material: Remove all waste materials from the site on a regular basis. Do not dispose of any materials onsite by burial or burning. The Contractor and its subcontractors shall comply with all applicable federal, state and local environmental laws and regulations, including but not limited to those involving hazardous waste.

C. Work Hours: Working hours, unless otherwise approved by the COR in writing, shall be between 7:00 A.M. until not later than 7:00 P.M. Monday through Friday. The construction site shall be secured at the end of the day.

D. Underground Utilities: The Contractor shall be responsible for checking with the owners of underground utilities as to the location of their underground lines and shall be solely responsible for any damage done to these installations due to failure to locate them or to properly protect them. Locations of existing utilities and service connections shown on the Plans are based on maps and information developed from limited field inspection. Actual utility locations, materials and size may vary from those shown on the Drawings. Utilities and service connections other than those shown may also be present (buried electric, telephone, etc.). It shall be the

Contractor’s responsibility to contact the Owner of each utility and arrange for field location service.

1.4 SECURITY

A. The construction area shall be secured and placed in a safe condition at the end of each working day.

PART 2 - PRODUCTS (Not Used)

PART 3 - EXECUTION (Not Used)

PART 4 - MEASUREMENT AND PAYMENT (Not Used)

END OF SECTION

01010

Specifications

SECTION 01015

MEASUREMENT AND PAYMENT

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section includes administrative and procedural requirements for unit prices, including the methods of measurement and basis of payment.

B. The unit price of each bid item of the contract shall cover all work required by the contract documents. All costs in connection with the work, including furnishing all materials, equipment, supplies and appurtenances; providing all construction plant equipment, and tools; and performing all necessary labor and supervision to complete fully the work, shall be included in the unit and lump sum prices bid. No item that is required by the contract documents for the proper and successful completion of the work will be paid for outside of or in addition to the prices submitted in the bid. All work not specifically set forth as an item on the Schedule of Items shall be considered a subsidiary obligation of the Contractor and all costs in connection therewith shall be included in the unit and lump sum prices bid.

C. All bid quantities stipulated in the unit price schedule of the Schedule of Items or other contract documents which are to be paid per bid lump sum are to be considered (a) as a basis for the probable cost of the work and (b) for the purpose of comparing bids submitted for the work. The Contractor agrees to make no claim for damages, anticipated profits or otherwise on account of any difference between the amounts of work actually performed and the bid amounts set forth herein except as provided.

1.2 DEFINITIONS

A. The following definitions apply to the units stipulated in the unit price schedule of the bid form:

1.3 PROCEDURES

A. The Contractor is required to perform and submit interim measurements for progress payments.

1.4 MEASUREMENT AND PAYMENT ITEMS

BASE BID SCHEDULE

A. GENERAL:

Item 1.1 Mobilization – Mobilization shall be measured and paid for by the design quantity indicated on the Schedule of Items at the contract unit bid price. Payment shall be considered full compensation for all preparatory work and operations performed by the Contractor, including but not limited to, those necessary for the movement of personnel, equipment, supplies, and incidentals to the project site; for the establishment of all offices, buildings, and other facilities necessary for all work on the project; for premium on bonds and insurance for the contract; for the Project Sign; permits; for other work and operations that must be performed or costs incurred before beginning work or after work begins that are not specifically covered in other listed various bid items of the project; and for all labor, equipment, materials and incidentals necessary to complete the work. Mobilization costs for subcontracted work shall be considered to be included. Mobilization cannot exceed 1.5% of the total base bid price.

B. WATER LINE “A”:

Item 2.1 Modifications to Meter Vault – The meter vault modifications shall be measured and paid for at the design quantity indicated on the Schedule of Items at the contract lump sum bid price completed in place and accepted. Payment for the meter vault modifications shall be made at the contract unit bid price as a lump sum of a complete in place and accepted meter vault. Price and payment shall be considered full compensation for furnishing and installing galvanized piping modifications, reinstalling the water meter; valves, removing soil and replacing with washed gravel, pressure reducing valve, strainer, sampling faucets, pipe bracing; pressure gauge; compressor coupler; unions and galvanized piping to 5 feet outside of structure wall, excavation, backfill, bedding, shoring, surface replacement adjacent to structure and dewatering; for special compaction required for the installation, cleanup, equipment, tools, and labor, and for the performance of all work and incidentals necessary to complete the item in full compliance with the plans and specifications.

Item 2.2 2” Dia. HDPE Pipe – The 2” water main piping shall be measured and paid for at the design quantity indicated on the Schedule of Items at the contract lump sum bid price completed in place and accepted. The lump sum payment is based on the design quantity and shall be considered full compensation for furnishing and installing pipe; fittings (bends and tee’s), fusion welding; furnishing and installing bedding; for trench excavation, backfill, shoring, surface replacement; dewatering; for cleaning, testing and disinfecting the water pipe; and tracer wire; for all equipment, tools, and labor; for thrust and anchor blocking; and for the performance of all work and incidentals necessary to complete the item in full compliance with the plans and specifications.

Item 2.3 1” Dia. HDPE Pipe – 1” water service piping shall be measured and paid for at the design quantity indicated on the Schedule of Items at the contract lump sum bid price completed in place and accepted. The lump sum payment is based on the design quantity and shall be considered full compensation for furnishing and installing pipe; fittings (bends and tee’s), fusion welding; furnishing and installing bedding; for trench excavation, backfill, shoring, surface replacement; dewatering; for cleaning, testing and disinfecting the water pipe; and tracer wire; for all equipment, tools, and labor; for thrust and anchor blocking; and for the performance of all work and incidentals necessary to complete the item in full compliance with the plans and specifications.

Item 2.4 Remove Stop and Drain Valves - Removal of the existing stop and drain valve and boxes shall be measured and paid for at the design quantity indicated on the Schedule of Items at the contract lump sum bid price completed in place and accepted. Price and payment shall be considered full compensation for removing the valve and box; surface restoration; for all equipment, tools, and labor; and for the performance of all work and incidentals necessary to complete the item in full compliance with the plans and specifications.

Item 2.5 Connection to Existing Hydrants – The connection of the water piping to the existing hydrants shall be measured and paid for at the design quantity indicated on the Schedule of Items at the contract lump sum bid price completed in place and accepted. Price and payment shall be considered full compensation for removing the existing stop and drain assembly, furnishing and installing the curb stop assembly as required; galvanized steel pipe; galvanized fittings; for fusion welding the HDPE fittings; connection to the existing hydrant piping, backfilling and compaction; disinfection and testing; for all equipment, tools, and labor; and for the performance of all work and incidentals necessary to complete the item in full compliance with the plans and specifications.

Item 2.6 Relocate Existing Concrete Slab & Hydrant – The relocation of the existing concrete slab & hydrant shall be measured and paid for at the design quantity indicated on the Schedule of Items at the contract lump sum bid price completed in place and accepted. Price and payment shall be considered full compensation for the moving of the concrete pad and hydrant; gravel sump; site grading; base material under the concrete slab; connecting the piping; surface replacement at the new site and the old site; all equipment, tools, and labor; and for the performance of all work and incidentals necessary to complete the item in full compliance with the plans and specifications.

Item 2.7 Steel Casing Pipe – The steel casing pipe shall be measured and paid for at the design quantity indicated on the Schedule of Items at the contract lump sum bid price completed in place and accepted. The lump sum payment is based on the design quantity and shall be considered full compensation for furnishing and installing (pushing) casing pipe; end excavations; backfill; surface replacement; for all equipment, tools, and labor; and for the performance of all work and incidentals necessary to complete the item in full compliance with the plans and specifications.

Item 2.8 Remove Miscellaneous Valve and Boxes Along the North Road - Removal of the existing valve and boxes shall be measured and paid for at the design quantity indicated on the Schedule of Items at the contract lump sum bid price completed in place and accepted. Price and payment shall be considered full compensation for removing the valve and box; surface restoration; for all equipment, tools, and labor; and for the performance of all work and incidentals necessary to complete the item in full compliance with the plans and specifications.

C. WATER LINE “B”:

Item 3.1 2” Dia. HDPE Pipe – The 2” water main piping shall be measured and paid for at the design quantity indicated on the Schedule of Items at the contract lump sum bid price completed in place and accepted. The lump sum payment is based on the design quantity and shall be considered full compensation for furnishing and installing pipe; fittings (bends and tee’s), fusion welding; furnishing and installing bedding; for trench excavation, backfill, shoring, surface replacement; dewatering; for cleaning, testing and disinfecting the water pipe; and tracer wire; for all equipment, tools, and labor; for thrust and anchor blocking; and for the performance of all work and incidentals necessary to complete the item in full compliance with the plans and specifications.

Item 3.2 1” Dia. HDPE Pipe – 1” water service piping shall be measured and paid for at the design quantity indicated on the Schedule of Items at the contract lump sum bid price completed in place and accepted. The lump sum payment is based on the design quantity and shall be considered full compensation for furnishing and installing pipe; fittings (bends and tee’s), fusion welding; furnishing and installing bedding; for trench excavation, backfill, shoring, surface replacement; dewatering; for cleaning, testing and disinfecting the water pipe; and tracer wire; for all equipment, tools, and labor; for thrust and anchor blocking; and for the performance of all work and incidentals necessary to complete the item in full compliance with the plans and specifications.

Item 3.3 Connect to Existing Hydrants – The connection of the water piping to the existing hydrants shall be measured and paid for at the design quantity indicated on the Schedule of Items at the contract lump sum bid price completed in place and accepted. Price and payment shall be considered full compensation for removing the existing stop and drain assembly, furnishing and installing the curb stop assembly as required; galvanized steel pipe; galvanized fittings; for fusion welding the HDPE fittings; connection to the existing hydrant piping, backfilling and compaction; disinfection and testing; for all equipment, tools, and labor; and for the performance of all work and incidentals necessary to complete the item in full compliance with the plans and specifications.

Item 3.4 Connect to Existing Tee Hydrants – The connection of the HDPE water piping to the existing tee hydrants shall be measured and paid for at the design quantity indicated on the Schedule of Items at the contract lump sum bid price completed in place and accepted. Price and payment shall be considered full compensation for removing the existing stop and drain assembly, furnishing and installing the curb stop assembly as required; galvanized steel pipe; galvanized fittings; for fusion welding the HDPE fittings; connection to the existing hydrant piping, backfilling and compaction; disinfection and testing; for all equipment, tools, and labor; and for the performance of all work and incidentals necessary to complete the item in full compliance with the plans and specifications.

Item 3.5 Blow-Off Assembly – The blow-off assemblies shall be measured and paid for at the design quantity indicated on the Schedule of Items at the contract lump sum bid price completed in place and accepted. Price and payment shall be considered full compensation for furnishing and installing the blow-off assembly as required; CMP vault; galvanized steel pipe and fittings; for fusion welding the HDPE fittings; ball valve; compressor coupler; CMP lid; locking parts; pad lock; cinder blocks; hose with couplers; backfilling and compaction; disinfection and testing; for all equipment, tools, and labor; and for the performance of all work and incidentals necessary to complete the item in full compliance with the plans and specifications.

Item 3.6 Steel Casing Pipe – The steel casing pipe shall be measured and paid for at the design quantity indicated on the Schedule of Items at the contract lump sum bid price completed in place and accepted. The lump sum payment is based on the design quantity and shall be considered full compensation for furnishing and installing (pushing) casing pipe; end excavations; backfill; surface replacement; for all equipment, tools, and labor; and for the performance of all work and incidentals necessary to complete the item in full compliance with the plans and specifications.

PART 2 - PRODUCT – NOT USED

PART 3 - EXECUTION – NOT USED

PART 4 - MEASUREMENT AND PAYMENT – NOT USED

END OF SECTION

01015 [Type text]

[Type text]

SECTION 01300

SUBMITTALS

PART 1 - GENERAL

1.1 SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES

A. Submit all shop drawings, product data and samples for the Contractor, subcontractor(s) and supplier(s).

B. Review all shop drawings prior to submittal. Mark each submittal, and/or each portion of the submittal, with the Specification Section Number that describes the contract requirements for the product being submitted on.

C. Submit in writing any substitutions to previously approved items for review by the COR.

D. Within 15 days after Notice to Proceed, submit a complete list of products proposed for use, providing manufacturer’s name, trade name, and model or catalog numbers, and manufacturer data.

E. Submit the number of copies needed by the Contractor, plus three copies for COR’s use.

PART 2 - PRODUCT

2.1 REQUIRED SUBMITTALS.

A. The following is a list of items for which literature must be submitted to the COR for approval before the item is ordered. The Contractor shall allow ten (10) working days, from date of receipt by COR, for review and approval. Descriptive literature should be supplemented by operation and maintenance specifications and related design information as indicated. The supplemental information need not be submitted until descriptive literature is approved. Submittals other than those required in the following list may be required by the individual sections of the specification. Exclusion from this list does not absolve the Contractor’s responsibility to provide the submittals required within this specification.

PART 3 - EXECUTION - NOT USED

PART 4 - MEASUREMENT AND PAYMENT - NOT USED

01300

SECTION 01400

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section describes the Contractor quality control testing requirements and Owner’s quality assurance program.

PART 2 - PRODUCT - NOT USED

PART 3 - EXECUTION

3.1 GENERAL

A. The Contractor will be responsible for quality control tests and inspections to control Contractor production and construction processes. Quality control testing frequency is at Contractor discretion, except where tests are specifically required in the technical specifications for individual products.

B. Pressure testing of the water system will be completed by the Contractor at the Contractor’s expense and observed by the COR.

3.2 CONTRACTOR EXPENSES

A. Contractor Quality Control tests are at Contractor expense and are considered incidental to the work.

END OF SECTION

01400

SECTION 01700

CONTRACT CLOSEOUT

PART 1 - GENERAL

1.1 CLEANUP

A. Before Final inspection execute the following.

1.2 RECORD DOCUMENTS

A. Submit record documents (3 sets) at the end of the project before final payment request. Final payment will not be processed until the documents are submitted to and approved by the COR.

PART 2 - PRODUCTS - NOT USED

PART 3 - EXECUTION - NOT USED

END OF SECTION

01700

SECTION 02221

TRENCH EXCAVATION AND BACKFILL

FOR PIPELINES & APPURTENANT STRUCTURES

1.1 DESCRIPTION

A. This work is the excavation or 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; and all backfill, subgrade preparation, final grading, site dressing and cleanup.

PART 2 - PRODUCTS

2.1 PIPE BEDDING MATERIALS

A. TYPE 1 PIPE BEDDING

1. Use existing trench excavated material (sand) for bedding material.

B. TYPE 2 PIPE BEDDING

2.2 TRENCH BACKFILL MATERIALS

A. Materials from Trench Excavation

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.

B. Imported Backfill Material

1. Imported backfill material is from borrow source(s) outside the project limits and is used when, in the opinion of the COR, an adequate volume of suitable backfill material is not available within the project limits. Imported Backfill Materials must comply with the requirements of Section 2.2.A, MATERIALS FROM TRENCH EXCAVATION.

2.3 BURIED WARNING TAPE

A. Detectable buried warning tape is to have a minimum 4 inch width and 5 mil 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 imprint.

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, structures, and fences. Restore or replace all disturbed or damaged facilities to its original condition at Contractor's expense.

2. Contact utility owners using the Montana One Call System for utility locates before starting work. 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.

B. Privately Owned Utilities

1. If any existing private utility interferes with the work in either alignment or grade, and has to be moved, the work will be performed by the appropriate UTILITY Owner, unless otherwise specified in the contract documents. Such private utilities may include gas mains, underground electrical and telephone cables, telephone poles, light poles, etc.

C. Existing Structures

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

D. Existing Overhead Utilities

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

E. When excavating across existing gravel parking pad or other developed surfaces, remove the surfacing material full depth and stockpile. Following trench excavation, the gravel pad material shall be replaced back to pre-construction conditions.

3.2 TRENCHING

A. General

B. Trench Dimensions

1. See Drawing Detail for typical width and depth of trenches.

C. Pavement Damage Caused by Equipment

D. Excavation for Appurtenances

1. Make excavations for hydrant rock sumps and slabs and curb stop valves to the size and depth to permit compacting of backfill on all sides to the specified density.

3.3 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.

3.4 EXCAVATION STABILITY AND SAFETY

A. The pipe trenches are only 2.5 feet deep. 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.

3.5 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 COR.

B. Pipe Bedding Placement

C. Trench Backfill

D. Replacement of Unsuitable Backfill Material

1. Remove and dispose of excavated soils that are saturated, contain deleterious materials or have characteristics that, in the opinion of the COR, render the soils unsuitable as backfill.

E. Backfill of Appurtenances

1. Place and compact backfill for appurtenances to finished grade around hydrant slabs as shown on the drawings.

2. Meet the backfill material, placement, and compaction requirements specified for the adjoining trench. Do not impact the existing hydrant slabs.

F. Buried Warning Tape

1. The use of warning tape is required for all buried water piping on this project. Provide warning tape as described in PRODUCTS Section 2.3. Bury tape a maximum 12 inches below finish surface grade.

3.6 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 COR.

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

3.7 CLEANUP

A. As work progresses, remove debris and complete to finish grade each portion of the work. When the work is complete: clear debris and finish the entire site to smooth, uniform slopes presenting a neat and workmanlike appearance.

3.8 TIME AND DISTANCE OF OPEN TRENCHES

A. Perform the work so that trenches will remain open the minimum time required to accomplish the work.

PART 4 - MEASUREMENT AND PAYMENT

4.1 SEE SECTION 01015 MEASUREMENT AND PAYMENT

02221

SECTION 02660

WATER DISTRIBUTION

PART 1 - GENERAL

1.1 DESCRIPTION

A. Furnish all water main pipe and fittings meeting the contract documents or specified as follows.

B. Furnish and install valves for water mains, together with related appurtenances.

C. Construct water services, including water service piping, corporation stops, curb stops and related items.

1.2 CERTIFICATION BY MANUFACTURER

A. Furnish a manufacturer’s certification covering all pipe and fittings furnished, certifying that the pipe and fittings meet applicable specifications.

1.3 REFERENCES

1.4 CONTRACTOR QUALIFICATIONS

A. High density polyethylene (HDPE) pipe thermal fusion welding and installation must be done by a firm or individual(s) having demonstrated satisfactory certification and performance history in the installation of HDPE pipe. If subcontracted, the firm or individual(s) will be responsible to the Contractor for all phases of HDPE pipe installation.

B. The information will be evaluated by the Owner and COR to determine if the experience and qualifications submitted are adequate to perform the work. The Owner and COR’s interpretation of Contractor or Subcontractor’s ability to perform the work will be final.

PART 2 - PRODUCTS

2.1 GENERAL

A. Furnish Water Main pipe and fittings as specified in the Contract Documents and meeting the material and testing requirements of this Section. Furnish fittings and service line piping of the same material and design as the water main pipe unless specified otherwise. Pipe strength classifications are shown on plan drawings and/or are listed in the Contract Documents.

B. References made to ASTM and AWWA, designations are the latest revision at the time of call for bids.

2.2 PIPE MATERIALS

A. General

1. Furnish the pipe specified in the contract documents meeting the materials and testing requirements as outlined in this section.

2. Assure all pipe is clearly marked showing type, class and/or thickness. Lettering must be legible and permanent under normal handling and storage conditions.

B. Galvanized Steel Pipe

C. HDPE Water Pipe

D. Fittings

Use tee fittings for connecting service lines of the same material, construction, and joint design as the main pipe. All tee fittings shall be fusion welded to main and service piping.

E. Pipe Jointing

2.3 CURB STOPS

A. Furnish curb stops with bronze plug, tee head with Minneapolis pattern and screw box mount (Mueller H-15156 or Ford B-66 or approved equal).

2.4 CURB BOXES

A. Furnish extension type curb boxes having a 1 1/2 inch diameter, Minnesota style box, adjustable valve boxes with the required base for the valve size used and a 2 ½ foot extended length (Mueller H-10302). Assure valve boxes are screw type and of the specified length for the pipe bury.

2.5 POLYETHYLENE WRAP

A. Furnish polyethylene wrap in accordance with AWWA C105, “Polyethylene Encasement for Fray and Ductile Cast - Iron Pipe for Water and other Liquids” (8 mil black, seamless).

2.6 THREAD TAPE

A. Teflon: John Crane “Thread Tape”, Garlock “Plasti-thread”, or Hoke “EZ Seal” shall be used for the thread tape.

2.7 THREAD SEALANT

A. Thiokol, Urethane or Teflon thread sealant shall be used.

2.8 QUICK CONNECT/DISCONNECT (AIR) FITTING

A. Quick connect/disconnect air fitting shall be a ¾” Air King universal coupler (male ends)

PART 3 - EXECUTION

3.1 TRENCH EXCAVATION AND BACKFILL FOR WATER MAINS

A. This work includes all trenching or excavation, backfilling, disposal of surplus and unsuitable material, and all work incidental to trench construction, including excavation for valves, fittings, connections to hydrants or other pipeline structures.

B. Perform this work in accordance with Section 02221: TRENCH EXCAVATION AND BACKFILL FOR PIPELINES & APPURTENANT STRUCTURES.

3.2 PIPE INSTALLATION FOR WATER MAINS AND SERVICES

A. General

B. Dewatering of Trench

1. Remove all water in the trench during pipe laying and maintain a dry trench until the pipe ends are sealed. Do not permit the pipe to float. Do not allow any trench water to enter the pipe at any time.

C. Laying of Pipe

D. Thermal Fusing HDPE

1. Butt Fusion

2. Mechanical Compression Joints for HDPE Pipe

3.3 POLYETHYLENE ENCASEMENT

A. Wrap all direct bury galvanized steel iron pipe and fittings including hydrants, curb stops, curb boxes, and all other metal parts and surfaces, in polyethylene encasement.

3.4 TESTING, CLEANING & DISINFECTING WATER MAINS, VALVES & FITTINGS

A. Hydrostatic and Leakage Testing

L = SD(P)

133,200

B. Cleaning Water Mains

C. Disinfecting Water Mains and Services

1. General

a. Disinfect the water mains subject to the COR’s approval in accordance with AWWA C651, “Disinfecting Water Mains”, and these specifications, before placing the main in service. Keep the interior of all pipe, fittings and appurtenances free from dirt, heavy and foreign particles.

2. Forms of Chlorine

a. The forms of chlorine that may be used, subject to the approval of the Engineer, are:

1) Liquid chlorine containing 100 percent available chlorine under pressure in steel containers. Meet AWWA B301 requirements and use only in combination with appropriate gas-flow chlorinators and ejectors.

2) Sodium hypochlorite in liquid form containing approximately 5 to 15 percent available chlorine. Meet AWWA B300 requirements.

3) Calcium Hypochlorite in granular form or in 5g tablets containing approximately 65 percent available chlorine by weight. Meet AWWA B300 requirements.

3. Methods of Chlorination

a. Three (3) methods of chlorination may be used. The tablet method gives an average chlorine dose of approximately 25 mg./L; the continuous feed method gives a 24-hour chlorine residual of not less than 10 mg./L; and the slug method provides a three hour exposure of not less than 50 mg./L free chlorine.

1) Tablet Method

TABLE 2

OUNCES OF CALCIUM HYPOCHLORITE GRANULES TO BE PLACED AT

BEGINNING OF MAIN AND AT EACH 500-FOOT (150 METER) INTERVAL

Pipe Diameter

Calcium Hypochlorite Granules

oz.

0.5

0.5

0.5

1.0

2.0

4.0

8.0

2) Continuous Feed Method

a) Before chlorinating, fill the main with water to eliminate air pockets and flush as specified above.

injecting the chlorine gas solution water into the main to be disinfected. It is recommended that direct feed chlorinators not be used. Hypochlorite solutions may be applied to the water main with a chemical feed pump designed for feeding chlorine solutions.

e) If approved, an optional continuous feed method utilizing calcium hypochlorite granules may be used. Place the granules in the pipe sections as specified under the Tablet Method.

3) Slug Method