01 57 23.00 10.pdf

Berlin Lake and M.J. Kirwan Lake, Pave Roads and Parking Areas

SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 57 23.00 10

STORM WATER POLLUTION PREVENTION MEASURES

PART 1 GENERAL

1.1 REFERENCES

1.2 GENERAL

1.3 SUBMITTALS

1.4 EROSION AND SEDIMENT CONTROLS

1.4.1 Erosion and Sediment Control Plan

1.4.2 Stabilization Practices

1.4.2.1 Unsuitable Conditions

1.4.2.2 No Activity for Less Than 21 Days

1.4.3 Structural Practices

1.4.3.1 Silt Fences

1.4.3.2 Rock Filter

1.4.3.3 Rock Construction Entrance

PART 2 PRODUCTS

2.1 COMPONENTS FOR SILT FENCES

2.1.1 Geotextile

2.1.2 Silt Fence Stakes and Posts

2.2 ROCK FILTERS

2.3 ROCK CONSTRUCTION ENTRANCES

PART 3 EXECUTION

3.1 GENERAL

3.2 INSTALLATION OF SILT FENCES

3.3 ROCK FILTERS

3.4 ROCK CONSTRUCTION ENTRANCES

3.5 MAINTENANCE

3.5.1 Silt Fence Maintenance

3.5.2 Rock Filter Outlet Maintenance

3.5.3 Rock Construction Entrance

3.6 INSPECTIONS

3.6.1 General

3.6.2 Erosion and Sedimentation Inspection Reports

3.6.3 Inspection Reports

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SECTION 01 57 23.00 10 Page 1 W911WN-09-B-0019 Revised by Amendment 0001

SECTION 01 57 23.00 10

STORM WATER POLLUTION PREVENTION MEASURES

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

OHIO DEPARTMENT OF TRANSPORTATION (ODOT)

ODOT Spec (2008) Construction and Material Specifications

1.2 GENERAL

The Contractor shall implement the storm water pollution prevention measures specified in this section in a manner which will meet the requirements of Section 01 57 20.00 10 ENVIRONMENTAL PROTECTION.

1.3 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Erosion and Sediment Control Plan; G, RE

SD-06 Test Reports

Erosion and Sedimentation Inspection Reports

SD-07 Certificates

Geotextile Aggregate

Prior to the delivery of materials, certificates of compliance shall be submitted certifying that the proposed materials meet the requirements specified.

1.4 EROSION AND SEDIMENT CONTROLS

1.4.1 Erosion and Sediment Control Plan

The Contractor shall obtain appropriateprepare erosion and sediment control permitsplan for the construction of the new parking lot at Berlin Lake.

The erosion and sediment control plan shall identify the type and location of the erosion and sediment controls to be provided. The plan shall

SECTION 01 57 23.00 10 Page 2 include monitoring and reporting requirements to assure that the control measures are in compliance with the erosion and sediment control plan, Federal, State, and local laws and regulations. The erosion and sediment control plan shall include temporary and permanent erosion and sediment control best management practices (BMPs). BMPs may include, but not be limited to, vegetation cover, stream bank stabilization, slope stabilization, silt fences, construction of terraces, interceptor channels, sediment traps, inlet and outfall protection, diversion channels, and sedimentation basins.

1.4.2 Stabilization Practices

The stabilization practices to be implemented shall include temporary seeding, mulching, geotextiles, sod stabilization, vegetative buffer strips, erosion control mats, protection of trees, preservation of mature vegetation, etc. On his daily CQC Report, the Contractor shall record the dates when the major grading activities occur, (e.g., clearing and grubbing, excavation, embankment, and grading); when construction activities temporarily or permanently cease on a portion of the site; and when stabilization practices are initiated. Except as provided in paragraphs UNSUITABLE CONDITIONS and NO ACTIVITY FOR LESS THAN 21 DAYS, stabilization practices shall be initiated as soon as practicable, but no more than 14 days, in any portion of the site where construction activities have temporarily or permanently ceased.

1.4.2.1 Unsuitable Conditions

Where the initiation of stabilization measures by the fourteenth day after construction activity temporarily or permanently ceases is precluded by unsuitable conditions caused by the weather, stabilization practices shall be initiated as soon as practicable after conditions become suitable.

1.4.2.2 No Activity for Less Than 21 Days

Where construction activity will resume on a portion of the site within 21 days from when activities ceased (e.g., the total time period that construction activity is temporarily ceased is less than 21 days), then stabilization practices do not have to be initiated on that portion of the site by the fourteenth day after construction activity temporarily ceased.

1.4.3 Structural Practices

Structural practices shall be implemented to divert flows from exposed soils, temporarily store flows, or otherwise limit runoff and the discharge of pollutants from exposed areas of the site. Structural practices shall be implemented in a timely manner during the construction process to minimize erosion and sediment runoff. Structural practices shall include the following devices. Location and details of installation and construction are shown on the drawings.

1.4.3.1 Silt Fences

The Contractor shall provide silt fences as a temporary structural practice to minimize erosion and sediment runoff. Silt fences shall be properly installed to effectively retain sediment immediately after completing each phase of work where erosion would occur in the form of sheet and rill erosion (e.g. clearing and grubbing, excavation, embankment, and grading).

Silt fences shall be installed along the downhill perimeter edge of all areas disturbed and along the toe of all cut slopes and fill slopes of the

SECTION 01 57 23.00 10 Page 3 construction areas. Final removal of silt fence barriers shall be upon approval by the Contracting Officer.

1.4.3.2 Rock Filter

Rock filter shall be constructed in existing channels at the locations shown on the drawings or as directed by the Contracting Officer to minimize the transfer of mud and dirt from the work areas.

1.4.3.3 Rock Construction Entrance

Rock construction entrance shall be constructed at the locations shown on the drawings or as directed by the Contracting Officer to minimize the transfer of mud and dirt from the work areas onto easements, private roads, public roadways, and other off-site areas.

PART 2 PRODUCTS

2.1 COMPONENTS FOR SILT FENCES

Components complying with the applicable State highway specifications for similar products may be substituted for the specified materials.

2.1.1 Geotextile

Geotextile used in the construction of rock construction entrances shall comply with the requirements of ODOT Spec, Section 712.09, Type C and shall consist of polymeric filaments which are formed into a stable network such that filaments retain their relative positions.

2.1.2 Silt Fence Stakes and Posts

The Contractor may use either wooden stakes or steel posts for fence construction. Wooden stakes utilized for silt fence construction, shall have a minimum cross section of 2 inches by 2 inches when oak is used and 4 inches by 4 inches when pine is used, and shall have a minimum length of 5 feet. Steel posts (standard "U" or "T" section) utilized for silt fence construction, shall have a minimum weight of 1.33 pounds per linear foot and a minimum length of 5 feet.

2.2 ROCK FILTERS

Aggregate for the rock construction entrance shall comply with ODOT Spec, Section 703.01. The use of slag is prohibited. AASHTO Size No. 1 coarse aggregate shall be used for the core of the Rock Filter. AASHTO Size No.

57 coarse aggregate shall be used for the upstream face of the Rock Filter.

2.3 ROCK CONSTRUCTION ENTRANCES

Geotextile used in the construction of rock construction entrances shall comply with the requirements of ODOT Spec, Section 712.09 and shall consist of polymeric filaments which are formed into a stable network such that filaments retain their relative positions. Use non-woven fabric. Aggregate for the rock construction entrance shall comply with ODOT Spec, Section

703.01 for AASHTO Size No. 1 coarse aggregate. The use of slag is prohibited.

SECTION 01 57 23.00 10 Page 4

PART 3 EXECUTION

3.1 GENERAL

The following installation methods shall apply. In case of conflict with the following installation methods, the methods shown on the drawings shall apply.

3.2 INSTALLATION OF SILT FENCES

Silt fences shall extend a minimum of 16 inches above the ground surface and shall not exceed 34 inches above the ground surface. Geotextile shall be from a continuous roll cut to the length of the barrier to avoid the use of joints. When joints are unavoidable, geotextile shall be spliced together at a support post, with a minimum 6 inch overlap, and securely sealed. A trench shall be excavated approximately 4 inches wide and 4 inches deep on the upslope side of the location of the silt fence. The 4-inch by 4-inch trench shall be backfilled and the soil compacted over the geotextile. Silt fences shall be removed upon approval by the Contracting Officer.

3.3 ROCK FILTERS

Rock filters shall be constructed in channels at the locations agreed to by the Contracting Officer. The aggregate shall be replaced with clean aggregate when the rock becomes clogged or the filter no longer functions as intended.

3.4 ROCK CONSTRUCTION ENTRANCES

Rock construction entrances shall be constructed at the locations agreed to by the Contracting Officer. Geotextile shall be placed under the aggregate. The aggregate shall be replaced with clean aggregate when the rock becomes clogged or the construction entrance no longer functions as intended.

3.5 MAINTENANCE

The Contractor shall maintain the temporary and permanent vegetation, erosion and sediment control measures, and other protective measures in good and effective operating condition by performing routine inspections to determine condition and effectiveness, by restoration of destroyed vegetative cover, and by repair of erosion and sediment control measures and other protective measures. The following procedures shall be followed to maintain the protective measures.

3.5.1 Silt Fence Maintenance

Silt fences shall be inspected in accordance with paragraph INSPECTIONS.

Any required repairs shall be made promptly. Close attention shall be paid to the repair of damaged silt fence resulting from end runs and undercutting. Should the fabric on a silt fence decompose or become ineffective, and the barrier is still necessary, the fabric shall be replaced promptly. Sediment deposits shall be removed when deposits reach one-third of the height of the barrier. When a silt fence is no longer required, it shall be removed. The immediate area occupied by the fence and any sediment deposits shall be shaped to an acceptable grade. The areas disturbed by this shaping shall receive erosion control or be seeded as required.

SECTION 01 57 23.00 10 Page 5

3.5.2 Rock Filter Outlet Maintenance

Rock filter(s) shall be inspected in accordance with paragraph INSPECTIONS. Close attention shall be paid to the repair of damaged rock filters and necessary repairs shall be accomplished promptly. The rock filter shall be cleaned of accumulated sediment and the AASHTO No. 57 coarse aggregate replaced as necessary when the depth of sediment reaches one-third of the height of the rock filter. When rock filters are no longer required, they shall be removed to the satisfaction of the Contracting Officer.

3.5.3 Rock Construction Entrance

The minimum depth of aggregate shown on the drawings shall be maintained in the rock construction entrance at all times. A supply of AASHTO No. 1 aggregate shall be stockpiled at the work area for maintenance purposes.

Sediment and debris tracked off site shall be cleaned up daily and returned to the work area. Dirt and mud tracked off site shall not be removed with water.

3.6 INSPECTIONS

3.6.1 General

The Contractor shall inspect disturbed areas of the construction site, areas used for storage of materials that are exposed to precipitation that have not been finally stabilized, stabilization practices, structural practices, other controls, and area where vehicles exit the site at least once every seven (7) calendar days and within 24 hours of the end of any storm that produces 0.5 inches or more rainfall at the site. Where sites have been finally stabilized, such inspection shall be conducted at least once every month.

3.6.2 Erosion and Sedimentation Inspection Reports

Disturbed areas and areas used for material storage that are exposed to precipitation shall be inspected for evidence of, or the potential for, pollutants entering the drainage system. Erosion and sediment control measures identified in the Storm Water Pollution Prevention Plan shall be observed to ensure that they are operating correctly. Discharge locations or points shall be inspected to ascertain whether erosion control measures are effective in preventing significant impacts to receiving waters.

Locations where vehicles exit the site shall be inspected for evidence of offsite sediment tracking.

3.6.3 Inspection Reports

For each inspection conducted, the Contractor shall prepare a report summarizing the scope of the inspection, name(s) and qualifications of personnel making the inspection, the date(s) of the inspection, major observations relating to the implementation of the Storm Water Pollution Prevention Plan, maintenance performed, and actions taken. The report shall be furnished to the Contracting Officer within 24 hours of the inspection as a part of the Contractor's daily CQC REPORT. A copy of the inspection report shall be maintained on the job site.

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