HomeMy WebLinkAboutM_015700_Erosion_Control_Specifications_250606_v1EROSION CONTROL 01 57 00-1
SECTION 01 57 00 EROSION CONTROL
PART 1 – GENERAL
1.01 DESCRIPTION
A. The Contractor shall perform work required to stabilize and prevent soil from eroding or otherwise entering onto all paved areas, watercourses, ditches, storm water and public sewer systems and to prevent dust attributable to this work from entering the atmosphere. The contractor shall comply with
the City of Renton and Washington State Department of Ecology (Ecology) erosion and sediment control requirements for this project and all other permit requirements. All work shall be done in
accordance with Federal, state and local codes and regulations.
B. Water containing suspended material from any part of the Contractors operations shall meet City of Renton Surface Water Design Manual requirements and State water quality standards before discharging into drains and streams.
C. Review, update, and implement Stormwater Pollution Prevention Plan (SWPPP) and ensure project compliance with City of Renton performance criteria by Contractor’s CESCL/SWPPP Supervisor.
1.02 SUBMITTALS
A. Submittals shall be in accordance with Section 01 33 00.
B. Product information for:
1. Silt fence fabric
2. Catch basin insert
3. Construction entrance geotextile fabric
4. Plastic sheeting
5. Gradation/Sieve analysis for stabilized construction entrance material
6. Fine Compost
7. Topsoil
8. Seed Mix
C. Source of supply for compost. Include supplier name and address, location of origination.
1.03 RELATED WORK SPECIFIED ELSEWHERE
A. Section 02 41 17, Demolition and Deconstruction
B. Section 31 23 23, Backfill and Compaction
PART 2 – PRODUCTS
2.01 SILT FENCE FABRIC
A. Silt fence material shall meet the following:
1. AOS (ASTM D4751) = 50-100 sieve size (0.30-0.15 mm)
2. Water Permittivity (ASTM D4491) = 0.02 sec-1 min.
3. Grab Strength (ASTM D4632) = 100 lbs min.
4. UV resistance (ASTM D4355) = 70% min.
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2.02 CATCH BASIN INSERTS
A. Provide catch basin inserts in accordance with Contract Documents and City of Renton Standard Plan 216.30. Insert shall be appropriately sized for the structure in which it is installed per manufacturer's recommendation.
2.03 STABILIZED CONSTRUCTION ACCESS
A. Construction entrance geotextile fabric: Woven polypropylene geotextile, Mirafi 500X or approved equivalent.
B. Quarry spalls per City of Renton Standard Plan 215.10.
2.04 PLASTIC SHEETING
A. In accordance with WSDOT Section 9-14.5(3) for 6 mil Plastic Covering.
2.05 FINE COMPOST
A. Fine Compost shall meet all requirements of City of Renton Surface Water Design Manual Reference 11-C.1.A for Specification 1 Compost (biosolids, manure, and/or bedding straw, wood chips, or saving containing animal excreta not allowed) and Reference 11-C1.C for Fine Compost gradation sizing.
B. Equivalent mulch products may be used with prior Owner and Engineer approval.
2.06 TOPSOIL
A. Topsoil as specified herein shall meet all requirements of City of Renton Surface Water Design Manual Reference 11-C.2 for Default Bioretention Soil Mix, including, but not limited to:
1. 35 to 40 percent by volume Specification 1 Compost per City of Renton Surface Water Design Manual Reference 11-C.1.A.
2. 60 to 65 percent by volume Bioretention Mineral Aggregate City of Renton Surface Water Design Manual Reference 11-C.2.C
B. Equivalent products may be used with prior Owner and Engineer approval.
2.07 SEED MIX
A. Seed Mix to be used for hydroseeding shall meet all requirements of City of Renton Surface Water Design Manual Appendix C.3 Construction Stormwater Pollution Prevention (CSWPP) Measures, Section C3.10 Seeding, for either Erosion Control Seed Mix or Landscaping Seed Mix.
B. Equivalent seed products may be used with prior Owner and Engineer approval.
2.08 MULCHING
A. Mulching shall meet all requirements of City of Renton Surface Water Design Manual Appendix C.3
Construction Stormwater Pollution Preventions (CSWPP) Measures, Section C.3.2 Mulching.
B. Wood fiber cellulose shall be applied with hydromulcher. Shall not be used without seed and tackifier.
PART 3 – EXECUTION
3.01 STREETS, SIDEWALKS, DRIVEWAYS AND PARKING LOTS
A. Excessive dirt on pavements shall be removed by means of hand shovels and hand brooms or appropriate mechanical equipment such as an automatic self-contained sweeper.
B. Dust on un-surfaced areas and any remaining dust on paved surfaces shall be controlled with an
appropriate dust suppression watering method approved by the District.
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C. The Contractor shall comply with the above requirements on a daily basis. If the contractor fails to perform the work in a satisfactory manner, the District may stop work, except cleanup operations, until the Contractor has satisfactorily complied with the above requirements.
3.02 WATER DISCHARGED INTO DRAINS OR STREAMS
A. The Contractor shall construct and maintain filters, sedimentation traps, or stilling basins with overflows to clarify waters containing suspended materials from the excavation areas before discharging to drains or streams. All discharges must be in compliance with applicable permit requirements, City of Renton Surface Management Design Manual, and Washington State Water Quality Standards.
B. Install erosion control structures and products as outlined in the Contractor’s SWPPP.
3.03 TURBIDITY MONITORING
A. On-site erosion control inspections and turbidity monitoring shall be performed in accordance with Ecology and City of Renton requirements. TESC monitoring report shall be part of the construction team meetings. Temporary and permanent erosion control and drainage measures shall be adjusted and maintained as necessary.
B. The contractor shall be responsible for meeting the turbidity requirements per the City of Renton Surface Water Design Manual and the Contractor’s CSWPPP. Additional measures may be required to achieve discharge requirements of less than 25 NTU or 5 NTU above background as approved by the City of Renton. These measures shall be at no additional expense to the Renton School District.
C. The Contractor shall implement a turbidity monitoring program in compliance with City of Renton Surface Water Design Manual and the Contractor’s CSWPPP. A qualified monitor, employed or retained by the Contractor, shall perform the turbidity measuring using an approved turbidity monitoring device. The person providing the turbidity monitoring shall be familiar with the monitoring equipment, and the regulations and requirements associated with the turbidity monitoring program. The Contractor shall be responsible for coordinating and implementing the monitoring plan. The monitor shall record the monitoring results on the Turbidity Testing Form and shall provide a copy of the record to the Architect and the Contractor. The Contractor shall have these results posted immediately after tests are performed. The monitor will provide monthly summaries to the Contractor for signature and the Contractor is responsible for submitting the summaries to Ecology and shall report any monitored turbidity exceeding 250 NTU to Ecology within 24 hours including corrective
actions that have been taken.
D. If during construction, the monitoring reports show that the turbidity threshold of less than 25 NTU has been exceeded, the Contractor shall take immediate corrective action to Bring the discharge into compliance. The Contractor shall pay for all additional testing required beyond the weekly testing to bring determine if the site is in compliance.
3.05 SITE STABALIZATION
A. Contactor shall stabilize all disturbed and exposed soils using approved topsoil and compost application.
1. Topsoil shall comply with requirements of Article 2.08 TOPSOIL as outlined above.
B. Spread topsoil base layer over areas having received approved fill to a minimum depth of 3 inches to
facilitate application of fine compost and hydromulch with seed and tackifier. C. Spread fine compost base layer over areas to be stabilized to a minimum depth of 2 inches tapering to perimeter of soil disturbance areas as necessary to facilitate application of hydroseed.
D. Apply hydromulch with seed and tackifier mix in compliance with City of Renton Surface Water Design Manual Section.C.3.10, including use of tackifier and incorporating mulch in the hydroseed
application as required and per supplier’s recommendations.
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1. Reapply hydromulch with seed and tackifier as required to areas that fail to establish at least 80 percent cover within one month.
2. Irrigate seeded areas with sufficient moisture but not to the extent to cause runoff for a period of 30 days, or if sooner as verified as established by the Environmental Consultant.
END OF EROSION CONTROL 01 57 00