TagEcology(797)

A 1995 Washington Department of Ecology staff discussion paper analyzes regulatory challenges in applying the NPDES permit program to municipal and industrial stormwater discharges, focusing on how to ensure such discharges comply with Clean Water Act water quality standards. The paper explores questions around defining 'Waters of the State,' determining compliance monitoring points, and identifying which permitted dischargers require water-quality-based effluent limitations. Note that this paper does not represent official Ecology policy and was intended to stimulate internal discussion and policy decisions.

Draft amendments prepared by Tom Culhane and Jerry Liszak of Washington Department of Ecology Northwest Regional Office, Water Resources Program, replacing text of OFTR 95-01 for the Initial Watershed Assessment of Water Resources Inventory Area 9 (WRIA 9), Green-Duwamish Watershed. Document covers hydrogeology, ground water-surface water interaction, water demand, streamflow status, water rights and claims

This 1995 Washington State Department of Ecology document provides guidance for cleaning up soils contaminated by petroleum products. It outlines remediation standards and procedures under the state's Toxics Cleanup Program, applicable across all regions of Washington State. Note: This document addresses soil contamination cleanup and does not contain content specifically related to Sea-Tac Airport noise policy.

Washington State Department of Ecology (Ecology) Publication #94-115 reporting natural background concentrations of metals in surficial soils throughout Washington State, based on a seven-year study co-sponsored by USGS Water Resources Division (Tacoma Office). Study divided Washington into 24 regions, selected 12 for statewide assessment, collected 490 soil samples from 166 locations including Puget Sound, Clark

Washington State Department of Ecology (Ecology) letter dated June 30, 1994, issuing NPDES Permit No. WA-002465-1 to Port Of Seattle – Sea-Tac International Airport, expiring June 30, 1999. Signed by John H. Glynn, Water Quality Supervisor, Northwest Regional Office. Permit authorizes discharge of industrial wastewater, non-contact cooling water, and storm water to Puget Sound, Des

This 1994 document is a Response to Comments on a proposed National Pollutant Discharge Elimination System (NPDES) wastewater discharge permit issued to the Port of Seattle for Sea-Tac International Airport. It summarizes public feedback gathered at meetings in Des Moines and Normandy Park, Washington, addressing topics such as storm water management, effluent limitations, spill plans, and pollution prevention at the airport. The document reflects the Department of Ecology's review of industrial wastewater, cooling water, and storm water discharges from airport operations including aircraft maintenance, fueling, and de-icing activities.

Parametrix Record of Communication (AR 026481–026483), project no. 55-2912-01, dated 3/30/94, by Linda Logan, documenting outgoing call to Kevin Fitzpatrick at Ecology (Ecolog[y]) as follow-up to 3/25/99 meeting. Topics include WER (Waste Effluent Ratio) work plan outline review by Gary Bailey and Randy Marshall, mixing zone study approach review by Norm Glen, AKART requirements at

Guidelines for developing freshwater wetlands mitigation plans and proposals, published March 1994 as Ecology Publication #94-29. Jointly produced by Washington State Department of Ecology, Washington State Department of Fish and Wildlife, U.S. Army Corps of Engineers, U.S. Environmental Protection Agency, and U.S. Fish and Wildlife Service. Covers restoration, creation, and enhancement of freshwater wetlands as

Implementation Memo No. 3 dated November 24, 1993, from Steve Robb of the Washington State Department of Ecology Toxics Cleanup Program to Interested Staff, addressing two issues regarding practical quantitation limits (PQLs) as cleanup standards under the Model Toxics Control Act (MTCA). Covers long-term liability for potentially liable persons (PLPs) who clean up to PQL

Washington State Department of Ecology Implementation Memo No. 3, authored by Steve Robb of the Toxics Cleanup Program, dated November 24, 1993. Addresses two issues under the Model Toxics Control Act (MTCA): (1) long-term liability for potentially liable persons (PLPs) when cleanup levels are set at practical quantitation limits (PQLs) rather than risk-based levels, including