WQR 93013

A D e p a r t m e n t o f E c o l o g y R e p o r t Stormwater Erosion and Sediment Control WQ-R-93-013 1 For Large Parcel Construction Report #4 of 5 Ecology's Stormwater Technical Manual defines large parcels as those that involve land disturbing activities of one acre of more. Stormwater Erosion and Sediment Control For Large Parcel Construction The Problem In urban environments, construction sites are the primary cause of exposed soil. Sediment washes off areas of exposed soil, enters the local drainage ways and streams, contributes to localized flooding problems, and damages water quality. This report summarizes erosion and sediment control requirements for large parcel projects - defined as land disturbing activities of 1 acre or more. Note that owners/developers of individual, detached, single family residences and duplexes must comply with small parcel minimum requirements. Another report in this series summarizes requirements for small parcels. Responses in the Puget Sound Basin In an effort to improve water quality in the region, the Puget Sound Water Quality Management Plan (Puget Sound Plan) was adopted in 1987. One goal of the Puget Sound Plan, in conjunction with local and federal programs, is to reduce pollutant discharges from stormwater caused by development and construction activities. In response to the stormwater element of the Puget Sound Plan, the Washington State Department of Ecology (Ecology) developed minimum requirements for stormwater management. The minimum requirements, and methods for meeting them, are presented in the…
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