COMH Tech Amendment 0007 - 01 57 13.00 22_Amended.pdf

CONSOLIDATED OPERATIONS AND MAINTENANCE HANGAR W91236-21-R-2003

Langley Air Force Base

SECTION 01 57 13.00 22

EROSION AND SEDIMENT CONTROL

07/06

AMENDMENT 19 NOV 21

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 in the text by the basic designation only.

AMERICAN ASSOCIATION OF STATE HIGHWAY AND TRANSPORTATION OFFICIALS

(AASHTO)

AASHTO MP 9-03 (2003) The Compost for Erosion / Sediment Control 'Filter Berms'.

VIRGINIA DEPARTMENT OF TRANSPORTATION (VDOT)

VDOT RBS (2020) Road and Bridge Specifications

VIRGINIA SOIL AND WATER CONSERVATION COMMISSION (VSWCC)

VSWCC VESCH (1992) Virginia Erosion and Sediment Control Handbook

1.2 DESCRIPTION OF WORK

The work includes the provision of temporary and permanent erosion control measures to prevent the pollution of air, water, and land within the project limits and in areas outside the project limits where work is accomplished in conjunction with the project.

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. "G, AE" code is applied where Architect/Engineer review and approval is required. "G, RO" code is applied where Government Resident Office review and approval is required. Submittals with an "S" are for inclusion in the Sustainability eNotebook, in conformance to Section 01 33 29 SUSTAINABILITY REPORTING.

Submit the following in accordance with Section 01 33 00 SUBMITTAL

PROCEDURES:

SD-01 Preconstruction Submittals

Construction Sequence Schedule

Erosion Control Plan

SD-03 Product Data

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Silt Fence

Dust Suppressors

Trackout Control Mat

1.4 CONSTRUCTION SEQUENCE SCHEDULE

Submit a Contractor furnished construction work sequence schedule, a minimum of 30 days prior to start of construction. The work schedule shall coordinate the timing of land disturbing activities with the provision of erosion control measures to reduce on site erosion and off site sedimentation. Installation of temporary erosion control features shall be coordinated with the construction of permanent erosion control features to assure effective and continuous control of erosion and pollution.

1.5 EROSION CONTROL PLAN FOR VIRGINIA

The erosion control plan indicated has been approved. No additional review and approval is required, unless the Contractor desires to modify the erosion control plan indicated. All modifications shall be submitted to, and approved by, the Resident Officer in Charge of Construction prior to start of construction. The Contractor shall be responsible for any additional costs and time incurred as a result of the modifications to the approved erosion control plan. Provide and maintain erosion control measures in accordance with VSWCC VESCH, and as specified herein.

PART 2 PRODUCTS

2.1 SILT FENCE

2.1.1 State Standard Silt Fence

VSWCC VESCH Standard 3.05, silt fence (maximum height of 34 inches ).

2.2 CURB INLET PROTECTION

VSWCC VESCH Standard 3.07, using wire fabric and filter fabric for silt fence. Provide washed aggregate for filter gravel, VDOT RBS, Section 203, Size No. 3, 357, or 5.

2.3 STORM DRAIN INLET PROTECTION FOR INLETS AND CATCH BASINS

VSWCC VESCH Standard 3.07, using silt fence for filter fabric.

2.3.1 Posts

One by two inch seasoned wood posts, 1 1/2 inch diameter seasoned wood posts or 1.0 pound per linear foot steel posts. Posts shall be minimum 3 feet long.

2.4 COMPOST FILTER SOCK

A mesh tube filled with composted material placed perpendicular to sheet flow runoff to control erosion and retain sediment indisturbed areas in accordance with AASHTO MP 9-03 .

SECTION 01 57 13.00 22 Page 2

2.4.1 Filter Sock Media

Media shall be mature compost that has been certified by the U. S.

Composting Council's Seal of Testing Assurance Program (www.composting council.org), and shall meet the following requirements.

a. pH: 5.0 - 8.5

b. Moisture Content: less than 60%

c. Organic Matter: greater than 25% dry weight

d. Particle Size: 99% passing 2" sieve; 30-50% passing 3/8inch sieve

e. Physical Contaminants: less than 1% dry weight

2.4.2 Filter Sock

Filter socks shall be delivered to the jobsite with media installed . The filter sock shall be produced from a 5 mil thick continuous HDPE filament, woven into a tubular mesh netting material, with openings in the knitted mesh of 3/8 inch (10mm). This shall then be filled with compost meeting the specifications outlined above to the diameter of the sock.

2.5 CONSTRUCTION ENTRANCE

Provide trackout control mat designed for extreme durability to withstand number of passes of construction vehicles and for prevention of foreign object debris (FOD). Provide mat of high density polyethylene (HDPE) with staggered, raised pyramids to break loose trapped rocks and debris that will not come in contact with other vehicles.

2.6 DUST SUPPRESSORS

Calcium chloride, or other standard manufacturer's spray on adhesives designed for dust suppression.

2.7 TEMPORARY SEEDING

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2.7.1 State Standard Temporary Seeding

Provide seed, lime, fertilizer, and mulch in accordance with t he pl ans.

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PART 3 EXECUTION

3.1 CONSTRUCTION SEQUENCE SCHEDULE

Stabilize areas for construction access immediately with gravel. Provide additional silt fence as grading progresses. Provide inlet protection around existing drainage structures, and inlet and outlet protection at the ends of new drainage systems. Stabilize graded and disturbed areas immediately after grading. Permanent stabilization shall be provided immediately on areas that have been final graded. Temporary seeding and mulching shall be provided on disturbed areas as specified in the paragraph entitled "Temporary Seeding." Installation of temporary erosion control features shall be coordinated with the construction of permanent erosion control features to assure effective and continuous control of

SECTION 01 57 13.00 22 Page 3 erosion and sediment deposition. Remove t empor ar y er osi on cont r ol measur es at t he end of const r uct i on and pr ovi de per manent seedi ng.

3.2 SILT FENCES

Install posts a maximum of 6 feet on center, and at an angle between 2 degrees and 20 degrees towards the potential silt load area. Silt fence height shall be a minimum of 16 inches above the original ground surface.

Do not attach filter fabric to existing trees. Secure filter fabric to the post and wire fabric using staples, tie wire, or hog rings. Imbed the filter fabric into the ground as indicated. Splice filter fabric at support pole using a 6 inch overlap and securely seal.

3.3 INLET PROTECTION

Where stake supported fabric is used, provide stakes evenly spaced around the perimeter of the inlet or catch basin, a maximum of 3 feet apart.

Stakes shall be driven immediately adjacent to the drainage structure, a minimum of 18 inches into the ground. The fabric shall be securely fastened to the outside of the stakes, with the bottom of the fabric placed into a trench and backfilled.

3.4 CURB INLET PROTECTION

Provide wire mesh over the curb inlet opening so at least 12 inches of wire mesh extends across the inlet cover and at least 12 inches of wire mesh extends across the gutter from the inlet opening, as indicated.

Place stone on wire mesh against curb inlet.

3.5 COMPOST FILTER SOCK

Place filter sock perpendicular to the direction of flow. Stake the filter sock on 5 foot centers with 2" x 2" hardwood stakes. Install in accordance with the manufacturer's directions.

3.6 CONSTRUCTION ENTRANCE

Provide as indicated at points of vehicular ingress and egress on the construction site. Secure mats to existing surfaces.

3.7 DUST SUPPRESSORS

Immediately dampen the surface before calcium chloride application. Apply dust suppressors on unsurfaced base, subbase and other unsurfaced travel ways. Apply calcium chloride at the rate of 1.0 to 1.25 pounds per square yard of surface for pellets for the initial application. For subsequent applications of calcium chloride, application rates may be approximately 75 percent of initial application rates. Do not apply when raining or the moisture conditions exceed that required for proper application. Apply other dust suppressors in accordance with manufacturers instructions.

Protect treated surfaces from traffic for a minimum of 2 hours after treatment. Repeat application of dust suppressors as required to control dust emissions.

3.8 TEMPORARY SEEDING

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SECTION 01 57 13.00 22 Page 4

3.8.1 Time Restrictions

Within 48 hours after attaining the grading increment specified herein, provide seed, fertilizer, mulch and water on graded areas when any of the following conditions occur:

a. Grading operations stop for an anticipated duration of 14 days or more.

b. When it is impossible or impractical to bring an area to finish grade so that permanent seeding operations can be performed without serious disturbance from additional grading.

c. Grading operations for a specific area are completed and the permanent sodding in Section 32 92 23 SODDING, is more than 14 days away.

d. When an immediate cover is required to minimize erosion, or when erosion has occurred.

e. Provide on erosion control devices constructed using soil materials.

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3.8.2 Seeding Requirements

3.8.2.1 AMENDMENT 19 NOV

21*******************************************************

3. 8.2.1 State Standard Seeding Requirements

For offsite utility work areas outside of limits of disturbance provide high endophyte fescue, drill seeded. Provide lime, fertilizer, and mulch in accordance with VSWCC VESCH Standard 3.31 and Technical Bulletin No. 4 for the Coastal Plain.

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3.8.2.2 Permanent Sodding

Temporary seeding shall be removed, and permanent sodding shall be provided as specified in Section 32 92 23 SODDING.

3.9 MAINTENANCE AND INSPECTION

Inspect erosion control devices after each rainfall and daily during pro longed rainfall. Remove sediment deposits after each rainfall or when sediment reaches approximately one-half the barrier height. Immediately repair damaged erosion control devices and damaged areas around and underneath the devices. Maintain erosion control devices to assure continued performance of their intended function. Modify the erosion control plan as required to control problem areas noticed after each inspection. Modifications shall be approved by the Contracting Officer.

3.10 CLEAN UP

At t he compl et i on of t he j ob, or when di r ect ed or appr oved by t he Cont r act i ng Of f i cer , t empor ar y er osi on cont r ol devi ces shal l be r emoved.

SECTION 01 57 13.00 22 Page 5

Erosion control devices and areas immediately adjacent to the device shall be filled (where applicable), shaped to drain and to blend into the surrounding contours, and provided with permanent seeding. Erosion control devices may remain in place after job completion when approved by the Contracting Officer.

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