ENCAP Erosion Control Minute – Effluent Limitation Guidelines

We will be taking a close look at the recent publication of the USEPA’s Proposed Effluent Limitation Guidelines. This proposed rule, which was put on public notice in late November, is intended to set more stringent standards on the quality of stormwater discharged from construction sites.

This important document, proposes to establish numeric turbidity standards for stormwater leaving construction sites of 30 acres or greater, specifically sites that have high clay content soils. This standard would apply for nearly all 30 acre or larger sites within the Illinois area and would have significant impacts on the methods used for erosion and sediment control on construction sites. This proposed rule would require the treatment of stormwater discharge to meet a level of clarity that is near drinking water quality.