02-Kenzie Ravine Specifications

KENZIE RAVINE WATER STORAGE TANK

Contents

SECTION 01010 - SUMMARY OF WORK

PART 1 - GENERAL

1.1 SECTION INCLUDES:

Project Location Description of work.

Owner responsibility.

Contractor use of site.

LOCATION:

The project is located near the Little Grass Valley Reservoir Recreational Area and is part of the water storage system for Little Beaver, Red Feather and Running Deer campgrounds, also known as Kenzie Ravine Water System. The project is located in T22N, R9E, section 27. From Oroville, CA, proceed north on Oro Dam Boulevard, then east on the Oro-Quincy Highway. Turn onto Forbestown Road toward Challenge, then on to County road 511 toward La Porte. Once you approach the east side of the lake turn onto FS road 22N57 and proceed for approximately 2 miles until reaching Little Beaver campground. Turn onto unmarked dirt road across from campground and continue uphill for approximately 1/3 mile where the existing tank is located. The new tank will be located adjacent to the existing.

DESCRIPTION:

Kenzie Ravine Water System Tank Construction:

Work under this contract consists of the following items of work:

Construction of an 18,000 gallon steel bolted tank and all water lines, connections, appurtenances, valves and boxes necessary in order to tie the tank in to the existing system.

1.4 OWNER RESPONSIBILITY:

A. The Plumas National Forest responsibility for project construction includes:

1.5 CONTRACTOR’S USE OF PREMISES:

A. Construction camp within the recreation site will not be allowed. One self- contained trailer may be allowed for the purpose of security with Ranger and Contracting Officer’s approval.

B. The Contractor shall conduct his operations to minimize inconvenience to the existing facility, users and owners. Construction signing and speed control will be required within the construction zone during periods of construction. Work periods shall be between the hours of 6 AM and 6 PM week days.

C. Storage of construction materials shall be limited to those areas designated and approved by the Contracting Officer.

D. Site clearing shall be limited to areas within the limits of construction, and as shown on the drawings. Care shall be taken not to damage or destroy natural vegetation outside construction limits.

SECTION 01051 - FIELD ENGINEERING

PART 1 – GENERAL

CONSTRUCTION GRADE CONTROL:

This work shall consist of providing and maintaining construction stakes and project control for the project. Work includes slope and grade control during the course of construction. Bank plugs and ‘blue top’ grade control will be required for the final grading of subgrade and placement of aggregate base. Control point and feature coordinates will be provided by the COR for the contractor’s use in construction staking.

Construction tolerance shall be as follows:

Aggregate Pad For Tank:

Pipelines:

Construction stakes and control points damaged or destroyed by contractors operations shall be replaced at the contractor’s expense. The contractor shall offset and reference any construction control point that may be damaged or destroyed during construction operations.

PROJECT CONTROL:

Contractor shall be responsible for setting elevation of bottom of tank exactly equal (within allowed tolerances) in elevation to the bottom of the existing tank AS SHOWN ON DRAWINGS.

UTILITY LINES:

Drawings show approximate locations of water lines and valve boxes. Contractor shall install water lines and valve boxes in a location that is appropriate for the topographical features of the ground. NO PART if the water line may be placed at an elevation higher than the bottom of the tank.

MATERIALS TESTING:

Material sampling and gradations testing for submittals shall be the responsibility of the Contractor. An independent testing laboratory or qualified materials technician shall be employed by the Contractor to perform materials testing, or materials suppliers shall furnish certificates of compliance to project specifications.

Material samples for maximum densities and material control shall be the responsibility of the Contractor. Material gradations shall be submitted to the COR for approval prior to placement of material. Material sampling shall be in accordance with the following schedule:

1.5 COMPACTION TESTING:

A. In-place density testing shall be performed during construction by an independent third party or soils laboratory employed by the contractor and approved by the COR. Testing frequencies shall generally be as determined by the COR. The Contractor shall cooperate in facilitating testing procedures.

PART 2 - PRODUCTS

Not Used.

PART 3 - EXECUTION

Not Used.

PART 4 - MEASUREMENT AND PAYMENT

4.1 FIELD ENGINEERING:

Measurement and payment for field engineering will be included as shown in the Bid Schedule. Payment will be lump sum and shall include all labor, equipment, mileage and incidentals necessary for field engineering required under these specifications.

END OF SECTION

SECTION 01900 - MOBILIZATION

PART 1 – GENERAL

DESCRIPTION: This work shall include preparatory work and operations necessary for the movement of personnel, equipment, supplies and incidentals to the project site, and for all other work and operations that must be performed prior to beginning work on various items on the project. This work also includes bonding costs.

PART 2 – PRODUCTS

Not used.

PART 3 – EXECUTION

Not used.

PART 4 – MEASUREMENT AND PAYMENT

MEASUREMENT:

Payment will be made under:

PAY ITEM DESCRIPTION PAY UNIT

01900 MOBILIZATION LS

PAYMENT: Progress payments shall be made as follows:

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

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

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

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

SECTION 01300 - SUBMITTALS

1.1 DESCRIPTION: The work of this section consists of submittal requirements before and during construction.

1.2 RELATED REQUIREMENTS: Closeout submittals - Section 01700.

1.3 SCHEDULES AND PLANS: As soon as possible after Notice of Award and Notice to Proceed, before beginning any work, submit Construction Schedule and Schedule of Values to the Contracting Officer. The Contracting Officer will review the Progress Schedule and the Schedule of Values for format and content.

A. Construction Schedule: Submit Progress schedule (normally in bar chart form) showing estimated starting and completion dates for each part of the work. The first progress payment will not be issued until an acceptable progress schedule is submitted.

Schedule of Values: For lump sum bid items exceeding $25,000, submit a schedule of dollar values based on the Contract Bid Schedule including all bid items. Break down into component parts each bid item involving a series of operations for which progress payments may be requested. The total costs for the component parts shall equal the bid amount for that item, and the total cost of all items shall equal the contract sum. The COR may request data to verify accuracy of dollar values. The Schedule of Values will form the basis for progress payments as provided for in the General Requirements.

Erosion Control Plan: Submit an erosion control plan to protect the waters of Little Grass Valley Reservoir from sediment and run-off from the construction site in the event of rain or thunderstorms during construction. The plan shall include the location, placement, and materials to be utilized. The plan shall also include installation details and maintenance procedures for the erosion control structures and devices.

1.4 SHOP DRAWINGS, PRODUCT DATA AND SAMPLES:

A. General Procedures:

3. List submittals on a transmittal letter with date of submittal and content of submittal. Transmittal letter shall be on Contractor’s letterhead or other approved format. All submittals shall be uniformly transmitted.

4. Specific Procedures:

a. Shop Drawings: Identify each copy of shop drawings with contract drawing number in lower right hand corner.

b. Manufacturer’s Literature: Submit only pertinent pages; mark each copy of standard printed data to identify products referenced in specification section.

d. Aggregate and Material Samples: Samples shall be large enough to perform the necessary tests and gradings required by the specifications. Twenty-five pound sample minimum for aggregates.

C. COR’s Review:

1. After approving submittals, COR will return Contractor’s copies.

2. If submittals are not approved, COR will return all copies to Contractor with reasons for rejection. Resubmit, identifying changes.

3. Any work done before approval shall be at Contractor’s own risk.

1.5 APPROVED EQUALS AND SUBSTITUTIONS:

A. For each item proposed as an ‘approved equal’ to contractor’s original submittal, submit a separate request. With each request, submit supporting data, including:

1. Drawings and samples as appropriate.

2. Comparison of the qualities of the proposed item with that specified.

3. Changes required in other elements of the work because of the substitution.

4. Name, address and telephone number of vendor.

B. A request for approval constitutes a representation that the contractor:

1. Has investigated the proposed item and determined that it is equal or superior in all respects to that specified.

2. Will provide the same warranties for the proposed item as for the item specified.

3. Has determined that the proposed item is compatible with interfacing items.

4. Will coordinate the installation of an approved item and make all changes required in other elements of the work because of the substitution.

5. Waives all claims for additional expenses that may be incurred as a result of the substitution.

1.6 MANUFACTURER’S INSTALLATION INSTRUCTIONS: When contract documents require compliance with manufacturer’s printed instructions, provide one complete set of instructions for the COR and keep another complete set of instructions at the project site until substantial completion.

Not Used.

PART 3 - EXECUTION

Not Used.

PART 4 - MEASUREMENT AND PAYMENT

4.1 SUBMITTALS: Payment will be included in the bid schedule for which this work relates, and no separate payment shall be made.

SECTION 02110 - CLEARING AND GRUBBING

DESCRIPTION: The work of this section consists of clearing, grubbing, and removing and disposing of trees, brush, tree roots, vegetation and debris. Clearing limits shall be as described below:

Utility lines shall be 10 feet maximum width, or as shown on the drawings.

Structure foundations and building slabs shall be 5 feet beyond the edge of the concrete. Overhanging limbs, branches or tree trunks encroaching into the clearing limit shall be trimmed, pruned or removed as approved by the COR.

PART 2 - PRODUCTS

Not Used.

PART 3 - EXECUTION

3.1 PROTECTION OF TREES AND PLANTS TO REMAIN: All trees and vegetation outside of the clearing limits shall remain undisturbed unless specifically designated for removal by the COR. Trees within the clearing limits to remain shall be specifically designated to remain by the COR.

3.2 CLEARING: Remove brush and vegetation from areas designated to be cleared. As directed, trim low hanging, unsound or unsightly branches on trees and shrubs designated to remain. Make cuts flush with trunk or branch.

3.3 GRUBBING: Remove all stumps, roots and debris within the clearing limits a minimum of 12 inches below subgrade elevations. Use hand methods for grubbing inside drip line of trees to remain.

3.4 DISPOSAL: Disposal of vegetative material shall be as follows:

A. All vegetative material resulting from clearing and grubbing operations shall be chipped or removed from the site and disposed of in accordance with local ordinances and regulations. Burning of construction slash will not be permitted without specific approval of the COR and as permitted by the U.S. Forest Service.

4.1 CLEARING AND GRUBBING: Payment will be included in the schedule under clearing and grubbing. Measurement shall be lump sum for all clearing on the project.

SECTION 02222 - EXCAVATING, BACKFILLING, AND COMPACTING FOR WATERLINES

PART 1 GENERAL

1.1 - SCOPE

This work consists of trench excavation, backfilling and compaction for utilities.

1.2 - MEASUREMENT AND PAYMENT:

No separate measurement for payment will be made for work specified in this section.

PART 2 PRODUCTS

2.1 BEDDING MATERIAL

Sand shall be clean free flowing granular material, free of vegetative matter with 100 percent finer than the No. 4 sieve, and with no more than six percent passing the No. 200 sieve.

Clean naturally rounded aggregate with a mix of particle sizes not less than 1/8 inch or greater than 1/2 inches. This material is commonly called pea gravel.

PART 3 EXECUTION

3.1 - GENERAL

Trenching shall be performed to the lines, grades, and dimensions AS SHOWN ON THE DRAWINGS to provide the minimum required cover and separation between lines. Excavation shall be considered unclassified regardless of material encountered.

3.2 - EXISTING UTILITIES

Prior to beginning trenching, the Contractor shall locate all existing underground utilities intersecting or parallel to the trench. Existing utilities shall be located by means of an electronic pipe and cable locator and the location identified by spray painting the ground surface.

3.3 - RESPONSIBILITY FOR UTILITIES

Any existing underground utilities SHOWN ON THE DRAWINGS or made known to the Contractor damaged by the work shall be repaired or replaced at no additional cost to the Government .

3. 4 - EXCAVATED MATERIAL

Trench excavation shall be placed in a neat pile adjacent to the trench a sufficient distance to prevent cave-ins. Spoils pile shall not obstruct traffic. Excess excavation or excavation not suitable for backfill shall be disposed of off Government property.

3.5 - BEDDING

All pipes shall be bedded in sand or crushed rock AS SHOWN ON THE DRAWINGS.

3.6 - BACKFILL

Native material may be used as backfill AS SHOWN ON THE DRAWINGS provided it contains no rocks larger than 3 Inches in the greatest dimension. Native backfill shall be compacted In 12 inch loose measure lifts to 90 percent of AASHTO T-180 Method C or D. In paved areas a one sack sand/cement slurry shall be used in paved unless approved otherwise.

3.7 – INDICATOR AND WARNING TAPE

Indicator tape and warning tape shall be placed during backfill process AS SHOWN ON DRAWINGS and shall be as described in Section 02600 –Waterlines and Appurtenances.

Payment will be made under:

PAY ITEM DESCRIPTION PAY UNIT

02222 TRENCH AND BACKFILL LS

END OF SECTION -02222

SECTION 02600 - WATER LINES AND APPURTENANCES

1.1 DESCRIPTION:

A. This section describes the requirements for furnishing and installing water lines and Option One hydrant replacement, including the materials to be used, methods and requirements for installation and measurement for payment. This also includes removal and disposal of any replaced infrastructure.

B. Work under this section shall include, but not be limited to installation of installing appurtenances; installing the pipe, including storing and handling, laying of the pipe and fittings, installing protective wrap where required; completing joints, including application of corrosion protection materials, placing of reaction blocking, installing and testing the locating wire, connecting to existing mains, and installation of valves, fittings and appurtenances associated with the water delivery system.

1.2 SUBMITTALS:

A. Submittals supplied by the Contractor shall include: catalog information on faucets, water tank valves, pipeline material, fittings, mechanical couplings, restrained joints and flange insulation kits; samples of gravel, permeable backfill, sand,; and laying diagrams for any sections of water main that cannot be laid with standard length material. The Contractor’s attention is directed to the General Conditions of this contract under ‘Submittals’.

1.3 QUALITY CONTROL:

A. The Contractor shall make all water materials available for inspection by the COR prior to their installation. The Contractor shall provide the necessary personnel and equipment to make these materials available. Each phase of work shall pass inspection by the COR before commencing work on the next phase. The phases shall consist of, but not be limited to, pavement cutting, excavation, bedding, pipe laying, application of corrosion protection, including protective wrap of D.I. pipe/ fittings, where required, shading around pipe, installing the locating wire, backfilling each layer, testing the locating wire, and trench restoration. Pressure and leak testing, and disinfecting requirements are described elsewhere in these specifications.

2.1 GENERAL:

A. Materials furnished for water mains shall include, but not be limited to, pipeline materials; fittings including bends, tees, wyes, crosses, reducers, caps, couplings, flanges and other special joints, flange insulating kits, polyethylene encasement, primers and solvents for use with PVC pipe, native and imported backfill, straw bales, concrete for reaction blocking and structure replacement, water and palliatives for backfill conditioning and dust control, locating wire and materials used for restoration of the trench and work area.

B. Requirements for backfill materials, both native and imported, are included with installation procedures contained elsewhere in this section.

2.2 PIPELINE MATERIAL:

A. Pipeline materials shall be either polyvinyl chloride pipe (PVC). The type of pipeline material, the nominal size; class, rating, or schedule, shall be AS SHOWN ON THE DRAWINGS, or as further limited by the Special Conditions of this Contract. In no case shall the system working pressure exceed the maximum working pressure for the pipeline material, size, class, rating, or schedule listed below:

B. The same type of pipeline material and manufacturer shall be used throughout the work unless specific types are listed for specific areas in the Special Conditions of this Contract.

2.3 PVC PRESSURE PIPE (POLYVINYL CHLORIDE):

A. PVC pressure pipe shall conform to AWWA C900, except as modified herein. This pipeline material shall be limited to nominal sizes ranging from 4” to 12” and further restricted to Class 150 and 200, all as shown on the plans and designated in this section and in the Special Conditions of this Contract.

B. PVC pressure pipe shall be furnished with cast iron equivalent outside diameters.

C. PVC pipe sections shall be supplied in 20-foot laying lengths. Pipe cut for closures shall be machined or otherwise rendered suitable for inserting into and making a tight joint with the coupling or fitting. Majority of pipe furnished shall be standard 20-foot lengths, except that shorter lengths may be required for horizontal and vertical curves, as described for installation elsewhere in this section. The remainder of pipe sections supplied may be of random lengths, but not less than 18-foot long. The Contractor shall not substitute multiple short lengths of pipe where one or more standard lengths will fit.

D. Pipe shall be supplied with plain ends suitable for use with PVC couplings using two elastomeric gaskets, or supplied with one plain end and one bell end using one elastomeric gasket. Solvent weld joints for 4-inch or larger pipe will not be allowed. Restrained joints using clamps on other devices will not be allowed. PVC couplings used for plain end pipe shall be of the same type of material and equivalent to the class of pipe for which they are to be used and shall be appropriately marked.

E. Rubber gaskets shall conform to the requirements of ASTM F477.

Each section of pipe shall be clearly marked with the nominal size and OD base (for example, 8-CI), type of pipe, dimension ratio number (for example, DR18), AWWA Pressure Class (for example, PC150), AWWA Designation Number (AWWA C900), the manufacturer’s name or trademark and production record code.

G. Sleeves for PVC pressure sewer shall be cast or ductile iron where specified. Pressure pipe shall b centered within the middle 1/3 of the sleeve with approved centralizers.

2.4 PVC SCHEDULE 40 AND 80 (POLYVINYL CHLORIDE):

A. Schedule (Sch) 40 and 80 PVC shall conform to ASTM D-1785, with a cell classification of 12454-A or 12454-B. This pipeline material shall be utilized as small diameter distribution laterals and large diameter service lines, all as shown on the plans and described in this section and in the special conditions of this contract.

B. Pipe sections shall be nominal 20-foot lengths. One hundred percent of the pipe shall be furnished as standard 20-foot lengths. Standard 20-foot lengths shall be used wherever possible. The Contractor shall not substitute multiple short lengths of pipe where one or more standard lengths will fit.

C. PVC schedule pipe shall be furnished with belled ends as solvent-weld socket conforming to ASTM D2672 or plain ends suitable for use with solvent-weld fittings, as specified in this section. Restrained joints using clamps or other devices will not be allowed.

Each section of pipe shall be marked with the nominal pipe size, the plastic pipe designation code, the schedule, the ASTM designation, the manufacturer’s name or trademark, and the laboratory’s mark certifying the pipe for use with potable water.

2.7 FITTINGS:

A. Faucets (also described as “hydrants”) shall be AS SHOWN IN THE DRAWINGS.

B. Fittings for large diameter PVC pressure pipe shall be either gray or ductile iron, conforming in all respects to AWWA C110, except as allowed herein. Fittings up to 16 inches, which require push-on or mechanical joints only, shall conform in all respects to either AWWA C110 or C153. Fittings up to 16 inches which require one or more flanges may be ductile iron fittings conforming in all respects to AWWA C153, except that the flanges shall have the following minimum thicknesses:

Minimum Flange Thickness (t) (in)

Nominal Dia. t__

B. All gray and ductile iron fittings shall have distinctly cast on the outside of their bodies the pressure rating, nominal diameter of openings, manufacturer’s identification, country where cast, the number of degrees of the circle on all bends, the letter ‘DI’ for ductile iron, all as required by AWWA C110 and C153.

C. Fittings for PVC Schedule 40 and 80 pipe shall be socket type, conforming in all respects to ASTM D-2466 and ASTM D-2467 respectively. Except where Schedule 80 fittings require threads, as shown on the plans, they shall conform in all respects to ASTM D-2464. These fittings shall be distinctively marked with the manufacturer’s mark, material designation, size ASTM designation number (D-2464 for Sch. 40 and D-2467 for Sch. 80), and the seal of NSF.

Valves larger than three (3) inches shall be ductile iron body, bronze trimmed, double disc non-rising stem, with rubber ‘O’ ring stem seals, and have a minimum rating of 125 p.s.i. Valves shall be Tyler DSR 250 or approved equal.

2.8 JOINT CONFIGURATIONS:

A. Push-on joints for PVC pressure pipe and related fittings may be substituted for mechanical joints where shown on the plans except where restrained joints for ductile iron pipe using mechanical joints are required.

B. Flanged joints on fittings shall conform in all respects to AWWA C110, except as otherwise allowed in certain instances for specific types of compact fittings described elsewhere in this section. Screwed flanges for ductile iron pipe shall conform to AWWA C115 and shall be furnished on minimum Special Class 53 pipe barrels. The flanges shall be properly aligned wherever required for valves and fittings. Gaskets for all flanges shall be full face 1/8 inch thick fiber reinforced rubber, except for flanged joints requiring insulation kits.

C. Where angle points in the pipe alignment require two elbow fittings to be flanged and bolted together, the Contractor may substitute a single fitting of proper degree bend to match the required angle. Such substitute elbow fittings shall comply fully with these specifications.

2.9 PVC PRIMER AND SOLVENT CEMENT:

A. Primer and solvent cement for use with PVC Schedule 40 and 80 pipeline material and fittings shall conform to ASTM F-656 and D-2564 respectively.

2.10 CONCRETE:

Concrete for reaction blocking shall be 2,000 psi conforming in all respects to the requirements for concrete work.

2.12 WATER STORAGE TANK:

A. Tank shall be an 18,000 gallon nominal capacity, bolted steel, water storage tank. The tank shall conform to the requirements of AWWA D100-05.

B. Fabricate and install in accordance with Section 13208.

PART 3 - EXECUTION

3.1 GENERAL:

A. This work shall consist of installing the pipe, tanks, fittings, appurtenances and locating wire. Installations shall be true to grade and alignments as shown on the drawings and in accordance with the Uniform Plumbing Code, and AWWA requirements.

3.2 HORIZONTAL ALIGNMENT:

A. The Contractor shall follow the horizontal alignment as AS SHOWN ON THE DRAWINGS. The Contractor’s attention is directed to Section 01051 ‘Field Engineering’ for staking requirements.

3.3 VERTICAL ALIGNMENT:

A. The vertical alignment SHOWN ON THE DRAWINGS shall be maintained within the limits described herein. If construction staking is required, the Contractor shall comply with requirements for construction staking, as described in Section 01051.

3.4 SEPARATION:

A. All water line installations shall conform to the ‘California Waterworks Standards’ contained in Chapter 16 of Title 17, California Administrative Code. Among others, these standards specify burial depth and separation requirements between water mains and sanitary sewer lines.

3.5 PIPE LENGTHS:

A. Pipe lengths shall be selected so that pipe can be installed through horizontal or vertical curves, or any combination thereof, without exceeding the maximum joint deflection as recommended by the manufacturer, or maximum pipe barrel deflection, as allowed by these specifications. All curves exceeding these requirements shall be made with fittings, or by selecting shorter pipe lengths. Individual pipe lengths shall not be less than one half the standard length unless approved by the COR.

3.6 TEMPORARY EROSION CONTROL:

A. The Contractor shall take whatever measures necessary to prevent excessive erosion of areas disturbed by this work and shall prevent sediments from leaving the work areas. Measures may include, but not be limited to filter fabric fences, straw bail dikes, interceptor swales, or other methods, all as approved by the COR.

B. Straw bales shall be placed across streams downstream of the areas to be disturbed prior to working in the area. Enough bales shall be used so as to adequately cross and filter the stream. Bales shall be placed in a row with their ends tightly abutting the adjacent bale so as not to allow normal stream flows to pass around, between, or underneath the bales.

C. Each bale shall be staked in place with at least 3 No. 4 rebar stakes, each of which must penetrate firm ground by 18”. The first stake in each bale shall be driven toward the previously laid bale to force the bales together.

3.7 FINAL CLEAN-UP:

A. All areas over and around the trench and appurtenances, and all other areas and surfaces disturbed by the construction activities shall be restored to an equal or better condition as existed prior to the start of construction.

PART 4 - MEASUREMENT AND PAYMENT

4.1 PAYMENT:

Payment will include furnishing and installation of water lines and appurtenances, valves, valve boxes, couplings trenching and backfill, and is included in the Bid Schedule under Water Lines and Appurtenances

4.2 MEASUREMENT:

Measurement shall be as shown in the Bid Schedule under Water Line and Appurtenances, and include all materials and labor for the completed installation. Limits of measurement shall be from points of connection to existing utilities and connections to tank, and to the edge of the drain, overflow and distributions as shown on the drawings.

Payment will be made under:

PAY ITEM DESCRIPTION PAY UNIT

BASE BID

02600 WATER LINES AND APPURTENANCES LS

OPTION: ADDITIVE BID ITEM

02600a HYDRANTS EA

SECTION 02602 - TESTING AND DISINFECTING WATER LINES

1.1 DESCRIPTION:

A. This section describes the requirements for pressure and leak testing, and disinfecting of water lines and appurtenances, including but not limited to, air release valve assemblies, blow-off valve assemblies, drain and valve assemblies, service assemblies, and all other appurtenances.

B. This section does not include disinfecting procedures for water storage tanks. If required, disinfecting of storage tanks is described elsewhere in these specifications.

C. This work shall consist of filling the water main and appurtenances with water and bleeding off all entrapped air, allowing the pipe line to soak, making all connections to the water main for expelling air and for testing equipment; running the test, visually inspecting exposed appurtenances, locating and repairing all leaks, re-testing, application of disinfectant, and flushing operations.

D. Materials furnished for this work shall include, but not be limited to, pipe and fittings for connections to the main, pumps, pressure regulator, a calibrated water storage tank, disinfectant, and all other materials, fittings and pipelines required to perform the tests and make the necessary repairs.

1.2 REQUIRED WORK SEQUENCE

A. The pressure test and the test for allowable leakage shall be performed simultaneously. Testing shall not commence until the water main and all appurtenances have been completely installed, up to and including compaction of road aggregate base. The Contractor may, at any time, perform his own pressure and leak test. However, these tests will in no way offset the requirement for a final pressure and leak test.

B. After successfully testing the water main and appurtenances, they may then be flushed and disinfected.

PART 2 - PRODUCTS

Not Used.

PART 3 - EXECUTION

3.1 GENERAL:

A. This section shall consist of testing the water main and appurtenances for both pressure and leakage requirements. These tests will be run simultaneously.

B. Prior to testing, the water main shall be slowly and carefully filled with water. All air shall be expelled slowly from the pipe and appurtenances in a manner so as not to create excessive surge pressures. All appurtenances shall be left on during the testing procedure.

C. The Contractor may, at his own risk, test against new or existing valves. Suspected leaking of these valves will not be accepted as a reason for having not passed the leakage test requirements. These valves shall either be repaired or replaced prior to the start of another testing sequence. If an existing valve is suspected of leaking, the Contractor may repair or replace the valve at his own expense, or disconnect the water main from the valve, install a bulkhead, and retest.

3.2 TESTING EQUIPMENT:

A. The Contractor shall be responsible for supplying, maintaining, and operating all testing equipment. In general, the testing equipment configuration shall consist of a pump receiving water from a calibrated storage tank. The pump discharge shall enter the water main through a tap or appurtenance. A pressure sustaining valve capable of being adjusted within the required pressure ranges shall be placed on a tee located in the pump discharge line. Discharge from the pressure sustaining valve shall return to the calibrated storage tank. Other types or configurations of testing equipment shall be subject to the COR’s approval. The pressure pump and pressure sustaining valve shall remain in operation continuously throughout the test period.

3.3 TEST PRESSURE:

A. The test pressure shall be 150 percent of the working pressure, as calculated for the lowest elevation of the test section, or 150 psi, whichever is greatest. The pressure maintained at the pump shall be adjusted for the difference in elevation between the lowest elevation of the test section and the pump location.

3.4 TEST DURATION:

A. The test duration shall be 2 hours. Pressure in the water main shall be maintained as near the calculated test pressure as possible for the full two hour duration. The pressure pump and pressure sustaining valve shall remain in operation continuously throughout the duration of the test.

3.5 REPAIRS:

A. During the pressure and leakage test, all accessible appurtenances shall be inspected for visual signs of leakage. All visual leaks shall be corrected immediately, regardless of the amount of leakage and the test shall be run again for its full duration. Should the pressure and leakage test fail, the Contractor shall begin to investigate all areas of suspected leakage and shall make all repairs necessary in order to affect a successful test. All repair methods shall be subject to COR approval. All leaks detected shall be repaired to a water tight condition. All repairs made shall be re-tested in accordance with these specifications. All repairs shall be made and a successful test accomplished prior to taking bacteriological samples.

3.6 DISINFECTING:

A. The interior of all water mains and appurtenances shall be disinfected in accordance with AWWA C651 and these specifications. Disinfection requirements shall include preventive and corrective measures during construction, forms of chlorine and methods of application, final flushing and bacteriological tests.

B. The methods and techniques described in these specifications are minimum requirements only. The Contractor shall be solely responsible for the methods and techniques used to successfully disinfect the water mains and appurtenances and for disposing of the highly chlorinated water during flushing operations.

C. Precautions shall be taken to protect the interior of water mains and appurtenances against contamination. The open ends of all water main laid in the trench shall be closed with water tight plugs when pipe laying has stopped. Stockpiled pipe and appurtenances shall also be protected from contamination.

D. If dirt or other contaminates enter the water main or appurtenances and, in the opinion of the COR, the contaminate will not be removed by the flushing operation, the interior surfaces shall be cleaned by mechanical means.

E. Water mains and appurtenances flooded during construction shall be cleared of flood water, flushed with potable water, isolated, and filled with chlorinated water so that at the end of a 24-hour holding period, the free chlorine residual is not less than 25 mg/L. The chlorinated water shall be flushed as described under Final Flush of these specifications.

3.7 METHODS OF CHLORINATION: Two methods of chlorination are accepted: tablets, and continuous feed. The slug method described in AWWA C651 will not be allowed.

A. Tablet Method:

1. This method may be used only if the mains and appurtenances are kept clean and dry during construction. The placing of calcium hypochlorite granules in addition to the tablets during construction is optional.

Calcium hypochlorite, 65 percent, 5 gram tablets shall be attached to the top inside surface of each length of pipe immediately prior to installation with a food-grade adhesive. Use only Permatex Form-a-Gasket No. 2, or Permatex Clear RTV Silicon Adhesive Sealant, or approved equal. Do not use Permatex Form-a-Gasket No. 1. The number of tablets for each pipe section shall be calculated as the following:

N = .0012d2L

Where:

3. When installation has been completed, the water main shall be filled with water at a rate so as not to create a velocity of more than one ft/sec. All air pockets shall be eliminated. The heavy chlorine solution shall remain in the mains at least 24 hours. If water temperatures are below 41 F., it shall remain for at least 48 hours.

B. CONTINUOUS-FEED METHOD:

1. This method shall consist of filling the completed mains and appurtenances to remove all air pockets, flushing to remove particulates, and refilling the mains with potable water chlorinated so that after a 24-hour holding period in the mains, there will be a free chloride residual of not less than 10 mg/L.

2. The methods and techniques used for preliminary flushing and chlorinating the mains shall be as described in Section 5.2 of AWWA C651. The placing of calcium hypochlorite granules during construction is optional.

3.8 FINAL FLUSHING:

A. The heavily chlorinated water shall be flushed from the mains and appurtenances and shall not remain in the mains more than 48 hours beyond the times required in this section. The heavily chlorinated water shall be flushed from the mains and appurtenances until chloride measurements show that the concentrations in the water leaving the main is no higher than that generally prevailing in the system, but not more than 1.0 mg/L.

B. The environment to which the chlorinated water is to be discharged shall be inspected. The Contractor shall be solely responsible for any damage caused by the discharge of heavily chlorinated water. If there is any question that the chlorinated discharge will cause damage to the environment, then a reducing agent shall be applied to the water to be wasted to neutralize thoroughly the chlorine residual remaining in the water. Reducing agents and their use shall comply with AWWA C651, Appendix B. Where necessary, federal state and local regulatory agencies should be contacted to determine special provisions for the disposal of heavily chlorinated water.

C. Upon completion of the disinfection process, water samples shall be tested for bacteriological quality in accordance with AWWA ‘Standard Methods for the Examination of Water and Wastewater’ and shall show the absence of coliform organisms.

D. Bacteriological samples shall be collected by the Contractor and tested at a laboratory approved by the COR. The number and location of samples shall be determined by the COR. Should any of the samples prove positive, the Contractor shall repeat the disinfecting process and retest.

3.9 REDISINFECTION:

A. If the initial disinfection fails to produce satisfactory bacteriological samples the main may be re-flushed and shall be re-sampled. If these second check samples continue to show the presence of coliform organisms, then the main shall be re-chlorinated by the continuous-feed method of chlorination until satisfactory results are obtained.

4.1 TESTING AND DISINFECTING OF WATER LINES: Payment shall be included in the bid schedule under ‘Water System’. No separate payment shall be made for testing and disinfecting.

SECTION 13208 - BOLTED STEEL WATER STORAGE TANK

PART 1 GENERAL

1.1 SCOPE

B. The work includes placement of grade ring, compacted agregate and backfill, installation of tank, tank appurtenances, and the excavation, backfill, and grading as required.

1.2 CODES AND STANDARDS

1.3 SUBMITTALS

1.4 QUALITY ASSURANCE

PART 2 PRODUCTS

2.1 DESIGN DATA

B. Steel shell sheets and rolled shapes shall be hot-rolled quality per ASTM A36 with a minimum yield strength of 36,000 psi. Minimum thickness shall be 12 gauge.

2.2 TANK APPURTENANCES

B. Pipe Connections:

1. Provide inlet , outlet, overflow and drain outlets AS SHOWN ON THE DRAWINGS

C. Overflow Pipe:

1. Provide steel internal and external overflow pipe, internal weir box, and supports. Overflow pipe assembly shall be powder epoxy lined and coated.

D. Ladders:

Provide a welded, hot dipped galvanized steel exterior ladder with backguard. The ladder shall have a lockable closure at the bottom. A 16” wide exterior ladder with safety cage and beginning a minimum of 4 ft above the level of the tank bottom and at the location designated. Exterior ladder shall meet Occupational Health and Safety Administration (OSHA 29 CF3 part 1910) requirements.

E. Roof Openings:

A mushroom screened vent shall be provided at the roof. The vent shall be fabricated to provide removable screened openings between the vertical support members of the vent. The screened openings of the vent shall be sized by the manufacturer. The screen shall consist of one layer of Type 316 stainless steel: 16 x 16 x 0.018 wire mesh insect screen. Vent shall be stainless steel, of heavy enough gauge to resist the above mentioned snow load.

The tank roof shall have a curbed upward opening 24 inches square, minimum, hatch located near the ladder. The curb shall extend at least 4 inches above the tank. The hatch cover shall be hinged and shall have locking provisions. The hatch cover lip shall extend for a distance of 2 inches down the outside of the curb. Hatch hinges shall be tack-welded or peened so that the hatch may not be easily removed.

G. Gaskets: Gaskets and sealants shall meet or exceed AWWA, FDA, and EPA standards for potable water. The lap joint sealant shall be a one-component construction grade elastromeric adhesive/sealant. The sealant shall meet all of the requirements of ASTM C920, Type S, Grade NS, Class 25, Use NT, and tested and certified by NSF.

The sealant shall be used to seal lap joints, bolt connections and panel edges. The sealant shall cure to a rubber-like consistency, have perfect adhesion to the panels, have low shrinkage, suitable for interior and exterior exposure and have a useful life of 20 years.

EPDM or Neoprene gaskets and tape type sealer shall not be used other than for shell manway door/hatch.

H. Bolts: Bolts used in tank lap joints shall conform with minimum requirements of AWWA D103 and shall be ½" - 13 UNC-2A rolled thread with hot dipped galvanized coating as per ASTM A153.

All bolts for tank shell and roof/floor (where applicable) shall be installed such that the head portion is located inside the tank and the washer and nut are on the exterior.

All lap joint bolts shall be properly selected such that threaded portions will not be excessively exposed in the "shear plane" between tank sheets. Also, bolt lengths shall be selected to achieve a neat and uniform appearance. The torque values (as set down in the Manufacturer’s Construction Guide) shall not be exceeded during tank construction.

All lap joint bolts shall be designed to prevent rotating during tightening.

G. Welded Steel potable water tank conforming to these requirements may be substituted by approval of the Contracting Officer.

PART 3 EXECUTION

3.1 SITE PREPARATION

B. No materials shall be placed until after the Contracting Officer has approved the foundation materials.

3.2 CONSTRUCTION

A. Field erection of the bolted-steel tank shall be in accordance with the procedures outlined in the Manufacturer's Construction Guide and performed by an Authorized Dealer of the tank Manufacturer, regularly engaged in erection of these tanks or a suitably qualified specialist sub contract builder under the control and supervision of the Authorized Dealer.

Leveling of the starter ring (or first full ring) shall be required. The maximum differential elevation within the ring shall not exceed 0.11 inch, nor exceed 0.04 inch within any 3ft length.

Specialized erection jacks and building equipment shall be used to erect the tanks - low profile, open topped tanks up to 25ft high may be built using the stacking method (ie built from foundations upwards) using suitable plant and equipment.

Particular care shall be taken in handling and bolting of the tank panels and members to avoid abrasion of the coating system. The Engineer may visually inspect all surface areas during construction and prior to liquid tests.

No backfill or mechanical loads shall be placed on the tank sidewall without prior written approval and design review by the tank Manufacturer. Any backfill shall be placed according to the instructions of the Manufacturer.

Particular care shall be exercised in handling and bolting of the tank plates, supports, and members to avoid abrasion or scratching the coating.

Touch-up coating shall be done per manufacturer's recommendations where and as directed.

B. Ends of pipe that must be left temporarily open for any reason either during or at the completion of construction shall be adequately plugged to prevent the entrance of dirt or other foreign matter.

3.3 PAINTING AND COATINGS

A. The bolted steel tank, interior and exterior, shall be painted in accordance with American Water Works Association Standard D103-97. Field coating, other than touch up will not be permitted.

1. All interior surfaces shall receive a 5 mil- minimum thickness applied in two coats. Coating shall be Trico bond 478. Primer shall be NSF approved thermo set epoxy, Epicon 925. Top coat shall be approved Thermo Set epoxy, Epilon 925.

All exterior surfaces shall receive a 3 mil- minimum thickness applied in two coats. One coat epoxy primer, Epicon 925, 2 mils dry thickness and one coat high solids acrylic baking enamel Technical Coatings Co. #894-N-006, 1 mil dry thickness. Exterior color shall be selected from manufacturers sample paint chips.

3.4 TESTING

A. Storage tank shall be leak tested after erection. Floor shall be clean and free from dirt, foreign substance, and debris.

B. The tank shall be tested by filling the tank to its overflow elevation. The completed storage tank shall show no leaks at end of 24 hour test period.

C. Any leak disclosed by this test shall be corrected by the erector in accordance with the manufacturer's recommendation. The tank shall then be retested until it passes. Water shall be supplied by the Contractor if system water quantities are insufficient for this testing.

3.5 DISINFECTION

A. After tank and connections are complete the tank shall be disinfected in accordance with method #3 AWWA-C 652 and in the following manner. The tank shall be filled to the overflow level with potable water containing enough chlorine to produce a concentration of 50 ppm in the full tank. After filling is complete, the tank shall stand full for at least 24 hours. The tank shall then be drained.

Disinfection shall not take place until the polyurethane joint sealant is fully cured (10 to 12 days @ 73 F 50% Relative Humidity).

The polyurethane joint sealant shall be suitable for contact with chlorinated water to 4-ppm for continuous exposure…