33_11_12_-_Steel_Manways_and_Line_Pipe_004_0004.pdf

Navajo-Gallup Water Supply Project Amendment 004 San Juan Lateral – Reach 1 Pipeline Improvements Solicitation No.

Revised Steel Manway and Line Pipe

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SECTION 33 11 12

STEEL MANWAY AND LINE PIPE

PART 1 GENERAL

1.01 MEASUREMENT AND PAYMENT

A. Steel Manway:

1. Measurement: Number of manways installed.

2. Payment: Unit price offered in Price Schedule.

a. Includes:

1) Excavation, CLSM, Removal and Control of Water, backfill, and compacting backfill in accordance with Section 31 23 22 – Pipe Trench Earthwork associated with Steel Manways.

2) Removal of existing pipe.

3) Installing:

a) Steel Manway and Line Pipe.

b) Items shown on Drawing 1695-D-62314.

4) Replacement of damaged asphalt concrete pavement with Section 32 12 22 – Asphalt Concrete Pavement.

B. Temporary Tank Bypass Connection

1. Payment: Unit price offered in Price Schedule.

a. Includes:

1) Excavation in accordance with Section 31 23 22 – Pipe Trench

Earthwork.

2) Removal of existing pipe.

3) Installing:

a) Steel Line Pipe with twelve (12) inch outlet.

b) Items shown on Drawing 1695-D-62315.

C. Existing Pipeline Lining Repair

1. Measurement: Area of cement mortar lining repairs required.

2. Payment: Square foot price offered in Price Schedule.

a. Does not include work to place mortar at pipe joints.

D. Existing Pipeline Hydrostatic Testing.

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1. Payment: Lump sum price offered in Price Schedule.

a. Includes work and recommendation report.

b. Include removing existing duck bill valve and installing a 42-inch blind flange.

E. Existing Pipeline Video Inspection Condition Assessment.

1. Payment: Lump sum price offered in Price Schedule.

a. Includes work and recommendation report.

F. Existing Pipeline Non-Destructive Assessment

1. Payment: Lump sum price offered in Price Schedule.

a. Includes work and recommendation report.

G. Existing Pipeline Survey

1. Payment: Lump sum price offered in Price Schedule.

H. Line Pipe Removal and Replacement:

1. Measurement: Horizontal Length of Line Pipe Replaced.

2. Payment: Linear foot price offered in Price Schedule.

a. For bidding purposes assume minimum replacement length of 10-feet.

3. Includes:

a. Excavation in accordance with Section 31 23 22 – Pipe Trench Earthwork.

b. Removal of existing pipe requiring replacement as determined during video inspection, hydrostatic testing, and non-destructive assessment.

c. Furnishing and placing materials, including but not limited to the following:

1) Pipe, Fittings, CLSM bedding and embedment, utility markers, concrete, reinforcing steel, blocking and collars, not included elsewhere.

2) Asphalt concrete pavement.

d. Laying pipe.

1.02 REFERENCE STANDARDS

A. American Society of Mechanical Engineers (ASME)

1. ASME B31G Manual for Determining the Remaining

Strength in Corroded Pipelines

B. ASTM International (ASTM)

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1. ASTM A139/A139M-16 Electric-Fusion (Arc) - Welded Steel Pipe (NPS 4 and Over)

2. ASTM A283/A283M-18 Low and Intermediate Tensile Strength Carbon Steel Plates

3. ASTM A1011/A1011M-15 Steel, Sheet and Strip, Hot-Rolled, Carbon, Structural, High-Strength Low-Allow and High-Strength Low-Allow with Improved Formability

4. ASTM A1018/A1018M-16a5 Steel, Sheet and Strip, Heavy Thickness Coils, Hot Rolled, Carbon, Structural, High- Strength Low-Alloy, Columbium or Vanadium, and High-Strength Low-Alloy with Improved Formability

5. ASTM E165/E165M-12 Liquid Penetrant Examination for General Industry

6. ASTM E709/E709M-15 Standard Guide for Magnetic Particle Testing

C. American Welding Society, Inc. (AWS)

1. AWS D1.1/D1.1M-15 Structural Welding Code – Steel

D. American Water Works Association (AWWA)

1. AWWA C200-12 Steel Water Pipe - 6 Inch (150mm) and

Larger

2. AWWA C205-12 Cement-Mortar Protective Lining and

Coating for Steel Water Pipe - 4 Inch (100mm) and Larger - Shop Applied

3. AWWA C206-17 Field Welding of Steel Water Pipe

4. AWWA C207-23 Steel Pipe Flanges for Waterworks Service, Sizes 4 In. Through 144 In. (100 Mm Through 3,600 Mm)

5. AWWA C208-12 Dimensions for Fabricated Steel Water Pipe Fittings

6. AWWA C227-11 Bolted, Split-Sleeve Restrained and Non-restrained Couplings for Plain-End Pipe

7. AWWA C604-11 Installation of Buried Steel Water Pipe 4 Inch (100 mm) and Larger

8. AWWA M11-04 Steel Pipe: A Guide for Design and Installation, Fourth Edition

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1.03 SUBMITTALS

A. Submit in accordance with Section 01 33 00 – Submittals.

B. RSN 33 11 12-1, Qualifications:

1. Certification of line pipe layers (Foreman).

2. Certification of line pipe and fitting manufacturers.’

A. RSN 33 11 12-2, Existing Pipeline Video Inspection:

1. Perform video inspection(s) and submit a copy of the digital recording of that video inspection for the entire length of the existing pipeline.

a. Video inspection shall be conducted prior to rehabilitation design, fabrication, and installation.

b. Coordinate access for video inspection with COR at least 21 days prior to video inspection.

c. Permanently label and identify digital recordings if multiple recordings are needed to inspect pipe with date, locations recorded, length recorded, and name of operator.

2. Provide recommendation report based on video inspection.

a. Identify locations where cement mortar lining needs to be repaired.

b. Identify any debris to be removed prior to work.

c. Identify any locations of obvious apparent seepage into the pipe.

d. Identify condition and station of existing appurtenances.

B. RSN 33 11 12-3, Existing Pipeline Hydrostatic Testing:

1. Results of testing, including measured pressures, station location and makeup water.

2. Provide recommendation report based on testing. At a minimum, identify station and lengths of pipe needing replacement.

C. RSN 33 11 12-4, Existing Pipeline Survey:

1. Provide both electronically (Adobe PDF, Excel, csv or similar compatible format) and physically for use in the rehabilitation design and installation.

2. Submitted survey data shall be consistent with the datum, coordinates, units, presentation format(s), and other details and requirements of Section 01 71 20 – Surveying and this Section.

D. RSN 33 11 12-5, Existing Pipeline Non-destructive Report:

1. Provide both electronically and physically (Adobe PDF, Excel, csv or similar compatible format) for use in the rehabilitation design and installation.

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E. RSN 33 11 12-6, Work Plan:

1. Provide a descriptive narrative detailing all applicable steps required to execute the work, including method of repair, removal/demolition, excavation, placement, backfill compaction, and finalization of each work site.

a. Include figures and sketches needed to fully detail work steps anticipated to be required to execute the work for the following:

1) Method for ventilating inside of pipe when performing work inside of pipe.

2) Buttering of joints.

3) Repair of cement mortar lining.

4) Removal of debris.

5) Repair leaks detected during temporary pumping prior to work identified by COR.

6) Installation of new air valve assemblies.

7) Installation of new blowoff assemblies.

8) Installation of new steel manways.

9) Installation of temporary tank bypass connection.

10) Installation of standpipe assembly.

11) Installation of any line pipe sections that are identified in the non-destructive assessment.

F. RSN 33 11 12-7, Shop Drawings. Show:

1. Pipe and fitting fabrication details.

2. Exact dimensions of joints and proposed joint restraint.

3. Exact dimensions of welding lead holes and repair method.

4. Details of factory epoxy lining of joint cement mortar hold back area if alternate epoxy joint recess lining is proposed.

G. RSN 33 11 12-8, Filling and Testing Plan:

1. Proposed rate, time, and procedure for:

a. Cleaning.

b. Filling.

c. Field and pressure testing.

d. Draining pipeline.

2. Method for disposing of water drained from pipeline to enable repair of leaks.

H. RSN 33 11 12-9, Flotation Prevention Plan:

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1. Show location and describe method of preventing pipe from floating.

2. Provide supporting calculations.

1.04 DELIVERY, STORAGE, AND HANDLING

A. Ship pipe after receiving OGR approval as detailed in Source Quality Assurance below.

B. Prevent damage to pipe and fittings during loading, transporting, unloading, storing, and laying.

C. Transport metallic pipe and fittings on padded bolsters curved to fit outside of pipes. Use heavy padding under ties.

D. Tightly close open ends of shop-applied, cement-mortar-lined pipe with plastic wrap for protection of cement-mortar lining during shipment:

1. Plastic Wrap:

a. At least 2 thicknesses of 6-mil sheet polyethylene plastic.

b. Remain on pipe until installation.

E. Support and store pipe above ground surface. Do not allow bells and spigots to contact each other or the ground.

F. Government will inspect pipe once it is delivered.

G. Replace or repair, as approved by OGR, any pipe that is damaged during shipment, storage, or installation at Contractor’s expense. Include linings and coatings.

1.05 QUALIFICATIONS

A. Pipe manufacturers shall be certified in accordance with ISO:9001 or similar nationally certified program approved by OGR.

1. 10 years successful experience producing products as specified.

2. Provide references for at least 3 completed projects with similar pipe diameters and pressures.

B. Pipe Layers (Foreman): Skilled and experienced in laying pipe. Minimum 2 years installing pipe with similar pipe diameters, pipe material, joints, and pressures.

C. Qualify welding procedures and welders in accordance with code under which welding is specified.

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PART 2 PRODUCTS

2.01 SOURCE QUALITY ASSURANCE

A. Approval for Shipment:

1. Pipe and fitting approval will be determined by inspection, during and after manufacture.

2. Government may inspect pipe units and fittings and will approve for shipment those which have been manufactured and tested in accordance with these specifications, unless Contractor is notified in writing.

3. Further inspection of pipe units and fittings will be in accordance with clause at FAR 52.246-12, Inspection of Construction.

2.02 NON-DESTRUCTIVE IN-LINE INSPECTION

A. Non-destructive testing and inspection of entire length of existing pipeline.

B. Conduct prior to rehabilitation design, fabrication, and installation.

C. Conduct an Electromagnetic Field Test or Acoustic Pipe Wall Assessment identifying defects in existing pipe wall: Log at a minimum every 0.1 linear foot.

D. Report imperfections with a probability of detection above 90% and a depth of metal loss above 10% pipe thickness. Present findings in a report.

E. Within 21 days, Government will identify pipe lengths requiring replacement.

F. Multiple in-line inspections may be conducted, if required, to provide complete inspection of the existing pipeline.

2.03 VIDEO INSPECTION

A. Video camera recording of inside pipeline with a minimum resolution of 720p, using a compression codec in the public domain. Labeled with project name, date of collection, location and /or station of inspection and other relevant information.

B. Multiple video inspections may be conducted, if required, to provide complete inspection of the existing pipeline.

C. Within 21 days, Government will identify pipe lengths requiring replacement.

2.04 HYDROSTATIC TESTING

A. Replace duckbill valve at the Reservoir with a blind flange prior to beginning testing.

B. Install Standpipe at Station 338+83.11 prior to testing.

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C. Test existing pipe in accordance with Article 3.14 A Leak Testing Pipeline.

D. Within 21 days, Government will identify pipe lengths requiring replacement.

2.05 EXISTING PIPELINE SURVEYING

A. Conduct prior to rehabilitation design, fabrication, and installation.

B. Survey data and results shall precisely and accurately define existing pipe location, access points (e.g. manholes), and pipeline appurtenances.

C. Survey of the existing pipeline shall be conducted in accordance with Section 01 71 20 – Surveying.

2.06 STEEL LINE PIPE

A. Pipe:

1. Electric fusion (arc) welded helical-seam steel pipe: ASTM A139, Grade C, D, or

E.

2. Fabricated in accordance with AWWA C200:

a. Except:

1) Steel plate: ASTM A283, Grade C or D.

2) Steel Sheet or coil: ASTM A1011, designation SS, Grade 40, 45, or 50; or ASTM A1018, designation SS, Grade 40 or designation HSLAS-F, Grade 50.

B. Inside diameter measured to inside of lining shall not be less than nominal diameter shown on drawings.

C. Minimum Steel Wall Thickness:

1. Greater thickness from the following requirements:

a. Steel Wall Thickness for Handling:

1) Equal to inside diameter (inches) of pipe steel shell divided by 240 for mortar lined and flexible coated steel pipe.

b. Steel Wall Thickness for Internal Pressure:

1) Hoop stress of pipe shell. Not to exceed:

a) 50 percent yield strength as defined by steel grade of steel using the Barlow formula. With pressure defined by working pressures shown in table on Drawing 1695-D- 61850.

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b) 75 percent yield strength as defined by grade of steel using the Barlow formula. With pressure defined by pipe head class as shown in table on Drawing 1695-D-61850.

2) Barlow formula as defined by AWWA M11 Equation 4-1.

D. Steel shall be fully killed and conform to fine grain practice.

E. Rubber gaskets, if used: In accordance with AWWA C200.

2.07 FITTINGS

A. Fittings should resist same loading conditions as adjacent pipe.

B. Steel: ASTM A283, Grade C or D or ASTM A1011, designation SS, Grade 40, 45, or 50; or ASTM A1018, designation SS, Grade 40 or designation HSLAS-F, Grade 50.

C. Minimum steel wall thickness and fitting dimensions: In accordance with AWWA C200, AWWA C208 and AWWA M-11.

D. Welding: AWS D1.1.

E. Lifting eyes and other handling devices: Made part of fitting before lining and coating are applied.

F. Bolts and Nuts: ASME B18.2.1 and FS FF-N-836.

G. Coating and lining:

1. In accordance with Section 09 96 20 – Coatings.

2. Apply lining with a resultant surface finish, including joints, equal to finish of adjacent pipe.

2.08 PIPE ACCESSORIES

A. Air Valve, Blowoff, and Manway Assemblies: In accordance with Section 33 12 10 – Valves and Equipment for Line Pipe Installations.

B. Provide dielectric insulating unions, fittings, and flange insulation gasket kits to prevent galvanic corrosion between dissimilar metals.

C. Manways and temporary bypass tank connection tees:

1. Cement-mortar lining: AWWA C205, in accordance with shop applied mortar for lining of specials, except:

a. Reinforcement required for pipe larger than 24-inch diameter.

b. Cement: ASTM C150, Type V.

2. Required at locations shown on drawings.

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D. Warning Tape:

1. Polyethylene tape.

2. Thickness: 4 mils.

3. Magnetically detectable.

4. Width, minimum: 6 inches.

5. Color: Blue with silver lettering.

6. Legend repeated at least every 3 feet: “CAUTION: WATERLINE BURIED

BELOW - FOR MORE INFORMATION CONTACT THE NAVAJO TRIBAL

UTILITY AUTHORITY”.

2.09 COUPLING TO EXISTING PIPE

A. Restrained flange adapter:

1. MegaFlange Series 2100 manufactured by EBAA, or equal, having the following essential characteristics:

a. Minimum cold water working pressure rating: 150 psi

b. In accordance with AWWA C110 and C111.

c. Suitable for connecting plain-end ductile iron pipe to flanged steel pipe with dissimilar metals.

d. Flanges: AWWA C207 Class D.

e. Restraint shall be provided by multiple individual actuated gripping wedges or bolts.

f. Coating/lining:

1) Section 09 96 20 - Coatings.

2) Cement mortar lining: Double thickness as defined by AWWA

C104.

B. Joints between fittings and ductile iron pipe:

1. Rubber gasket joints,

2. Joint dimensions and tolerances: suitable to connection to existing ductile iron pipe.

C. Tees: As shown on drawings.

2.10 LININGS AND COATINGS

A. In accordance with Section 09 96 20 – Coatings.

B. Do not field apply mortar lining without OGR approval.

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2.11 FLANGES

A. In accordance with AWWA C207.

B. Class: Working pressure meets or exceeds head class of attached pipe.

2.12 FLANGE GASKETS

A. BLUE-GARD Style 3000 manufactured by Garlock Sealing Technologies, 1666 Division Street, Palmyra NY 14522, or equal, having the following essential characteristics:

1. Sized in accordance with AWWA C207, Table 1.

2. For AWWA C207 flanged joints.

3. Compressed, Non-Asbestos (CNA) Gasketing with Aramid Fibers and a NGR

Binder.

4. For cold-water service.

2.13 CONTRACTOR SOURCE QUALITY TESTING

A. Hydrostatic Test of Pipe and Fittings:

1. Perform shop hydrostatic test on pipe which stresses steel to 75 percent of minimum yield point of the steel.

2. Hold pressure long enough to allow thorough inspection of welded joints.

3. Repair leaks by rewelding and retesting joints.

4. Test sections prior to forming bell and spigot joints.

5. Repair defects and retest section before applying lining and coating.

6. Government may witness hydrostatic testing and calibration of pressure gauges.

Notify Government 30 days prior to performing hydrostatic test.

PART 3 EXECUTION

3.01 GENERAL

A. Perform cleaning, filling, and testing after backfill has been placed to finished grade or as approved by OGR.

B. In accordance with 01 71 20 – Surveying.

C. Protect pipe from contamination, damage, and elements during storage on-site by covering with tarp as directed by OGR.

D. Install pipe based on these specifications or pipe manufacturer’s recommendation, whichever is more stringent.

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3.02 NON-DESTRUCTIVE IN-LINE INSPECTION

A. Notify COR at least 7 days prior to non-destructive inspection work.

B. Conduct an Electromagnetic Field Test or Acoustic Pipe Wall Assessment identifying defects in existing pipe wall:

1. Log at a minimum every 0.1 linear foot.

2. Report imperfections with a probability of detection above 90% and a depth of metal loss above 10% pipe thickness.

3.03 VIDEO INSPECTION

A. Notify COR at least 7 days prior to video inspection.

B. Conduct video inspection in a drained pipe, and clearly show the existing conditions within the existing pipeline. Some residual water can remain in existing pipeline following draining, provided video inspection clearly shows details and conditions within the pipeline. Include:

1. Condition of vaults and equipment inside of vaults.

2. Amount of corrosion.

3.04 EXISTING PIPELINE SURVEYING

A. Notify COR at least 7 days prior to existing pipeline surveying.

B. Survey Access points, pipeline appurtenances, and other openings. Include:

1. Locations of surface appurtenances.

2. Centerline of pipeline and depth at vaults and horizontal bends.

3. Existing pipeline markers and offsets.

C. Use video inspection data or captured still images to supplement survey data.

3.05 CEMENT MORTAR LINING REPAIR

A. Repair damage larger than 3-inch detected in video inspection. Perform repairs in accordance with Section 09 96 20 – Coatings.

3.06 INSTALLATION

A. Joining Pipe: In accordance with AWWA C604.

B. Keep openings to existing and/or installed pipe closed with watertight inflatable plugs during work stoppage, including end of work day, breaks, and work delays.

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C. If pipe is flooded during construction, clear floodwater by draining and flushing with water, or other approved method, until pipe is clean.

A. Line manways with cement mortar in accordance with Section 09 96 20 – Coatings.

B. Install warning tape over center of pipe at least 18 inches below ground and at least 18 inches above pipe.

3.07 TOLERANCES

A. Within manufacturer’s tolerances of restrained flange adapter.

3.08 JOINT LINING AND COATING

A. Field joints for pipe with shop applied cement-mortar lining.

1. Line field joints with cement-mortar in accordance with AWWA C205.

2. Coat exterior joints as specified in Section 09 96 20 – Coatings.

3. Do not backfill field joints until coating is approved by OGR.

3.09 LAYING PIPE

A. Excavate pipe trench in accordance with Section 31 23 22 – Pipe Trench Earthwork.

1. Grade pipe trenches to provide uniform slope along bottom of pipe.

2. At joints involving bells or collars, provide holes at joint of ample size to prevent bells or collars from coming in contact with subgrade and to allow for CLSM placement.

B. Keep pipe trenches free of water during pipelaying operations.

C. Lower pipe into trench and place pipe in position such that no soil gets inside pipe and pipe is not damaged.

D. When pipelaying is not in progress, keep ends of pipelines closed with watertight inflatable plugs.

E. Joining Steel Manways and Pipe:

1. Manway joint shall be at least 5-feet from existing joint.

2. Remove existing ductile iron pipe bell and cut plain end to fit with new steel pipe.

Coordinate final placement with OGR.

3. Install Steel Manway to match existing line and grade.

4. Assemble push-on or mechanical joints in accordance with applicable AWWA standard for pipe type and manufacturer’s recommendations.

5. Maintain pipe firmly in final position.

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6. Placing Elastomeric Gasket:

a. Clean gasket, bell, especially the groove, and spigot with rag, brush, or paper towel to remove any dirt or foreign material.

b. Use only gaskets which are designed for and supplied with pipe.

c. Lubricate pipe as recommended by manufacturer.

d. Spigot Groove Method:

1) Follow manufacturer’s recommended practices for gasket installation.

2) After placing elastomeric gasket in spigot groove, equalize elastomeric gasket cross section by inserting tool such as a large screwdriver under elastomeric gasket and moving it around periphery of pipe spigot.

e. Coupling Groove Method: Follow manufacturer’s recommended practices for gasket installation. Typically, factory installed.

7. Fit pipe unit’s together, spigot to bell or coupling, and draw joints together so that bells or couplings and spigots are fully engaged with uniform contact to gasket.

8. Do not swing or "stab" joint and do not suspend pipe and swing into bell or coupling.

9. Fit pipe units together in a manner to avoid twisting or otherwise displacing or damaging elastomeric gasket.

10. After joining pipe units, insert feeler gauge between pipe bell and pipe spigot.

a. Move gauge around periphery of pipe to determine that position of elastomeric gasket is correct and there are no fish-mouth problems.

b. If adjustment of position of a length of pipe is required after installation, remove and relay length of pipe as new pipe.

F. Changes in Alignment and Grade:

1. Do not exceed manufacturer’s deflection tolerances.

2. Do not encase rubber gasket joints in concrete.

3. Refer to individual pipe Sections for additional requirements. If requirements conflict, use most stringent requirement.

G. Schedule work so that at no time pipe remains in trench more than 7 days before backfill is placed to original ground surface or to other specified backfill limits shown on drawings.

3.10 BACKFILL

A. Complete earthwork in accordance with Section 31 23 22 – Pipe Trench Earthwork.

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B. Keep internal supports in place until CLSM been placed to a minimum height of 0.7 times outside diameter.

C. Place backfill about pipe carefully to avoid lateral displacement of pipe and damage to joints.

D. If pipelaying operations are interrupted for more than 24 hours, cover pipe laid in trench with backfill.

3.11 PIPE DIAMETER DEFLECTION

A. For pipe replacement of greater than 100 feet.

B. For pipe greater than 24 inches:

1. Measure short term deflection of internal diameter:

a. Within 2 weeks after completion of backfill.

b. When interior bracing required, remove before making measurements.

2. Measurement Frequency: Each pipe unit laid.

3. Measurements:

a. Measure vertical and horizontal diameter at approximate midpoint of pipe unit.

b. Record pipe deflections and station where measurements were taken.

c. Mark inside of pipe so that future comparisons can be made.

C. Deflection limitations apply per individual pipe sections.

D. Take corrective action if required limits are not meet, including removing and replacing pipe that exceeds allowable deflection tolerance.

E. Allowable short-term vertical pipe diameter deflection after backfilling is complete.

1. Decrease, maximum: 2 percent of nominal pipe diameter.

2. Elongation, maximum: 3 percent of nominal pipe diameter as measured when backfill reaches pipe crown.

F. Allowable long-term vertical pipe diameter deflection, at end of warranty period.

1. Decrease, maximum: 3 percent of nominal pipe diameter.

3.12 FIELD EXAMINATION

A. Clean pipe before filling.

B. Clean foreign material from pipeline throughout installation and prior to testing to the satisfaction of the OGR.

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3.13 FILLING AND DRAINING PIPELINE

A. Notify OGR 7 days before filling and testing.

B. Government will provide water.

C. Pipeline fill rate, maximum: 9 cubic feet per second.

D. Maintain pipeline completely filled for at least 72 hours before testing.

E. Dispose of testing water by approved method.

3.14 CONTRACTOR FIELD QUALITY TESTING

A. Leak testing pipeline:

1. Notify OGR at least 7 days before applying pressure to pipeline.

2. Do not start leak testing when snow or standing water is on the ground. Suspend testing as directed by OGR if precipitation accumulates on the ground.

3. Furnish pumps, power, pressure gages, and air valves at each end of pipeline and calibrated flow meters for testing.

4. Comply with AWWA C600 for Ductile Iron pipe, except as noted below.

5. Test pipeline with hydrostatic pressure equal to elevation listed:

a. Hydraulic Grade Elevation: 5295.0 at the standpipe (Station 338+83.11).

b. Test Segment: Length of existing pipeline.

6. Prior to starting test, maintain pressure in pipe for 24 hours.

7. Test for 96 hours or as approved by OGR.

8. Measure volume of water required to maintain pressure during test:

a. Acceptance criteria:

1) Test pressure shall not drop by more than 5 psi during test period.

2) Repair any pipeline leakage detectable by any means as approved by OGR.

b. If criteria are not met, repair or replace pipe or fitting and repeat test until acceptance criteria is achieved.

9. Drain pipe using both gravity flow and sump pump at blowoffs or as approved by

OGR.

10. Seal openings to pipe as approved by OGR.

B. Pipeline leakage discovered after leak testing:

1. Repair Contractor installed pipeline leakage detectable by any means as approved by OGR.

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2. Retest pipeline test segment containing repair to prove allowable leakage at test pressure for 96 hours.

END OF SECTION

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