TagModel Toxics Control Act(35)
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1999-05-01EXH AR023630: STIA Ground Water Study — Public Participation Plan
This 1999 plan, prepared jointly by the Washington State Department of Ecology and the Port of Seattle, outlines how the public will be involved in a ground water study at Seattle-Tacoma International Airport. The study was prompted by decades of jet fuel and petroleum product releases from underground storage tanks and fuel systems in the Airport's Aircraft Operations and Maintenance Area, which contaminated soil and ground water across 13 known sites. The plan describes required and additional public participation activities, community outreach roles, and the two-phase study approach, which included computer modeling of ground water flow to assess contamination risks to public water supplies and surface water. -
1996-02-01Exhibit 2124: Model Toxics Control Act Cleanup Levels and Risk Calculations (CLARC II) Update, February 1996
Washington State Department of Ecology publication #94-145 (updated 1/96) presenting the February 1996 annual update to the MTCA (Model Toxics Control Act) Cleanup Standards under CLARC II. Covers Method B and Method C cleanup levels for soil and groundwater, reference doses (RfD), cancer potency factors, hazard quotients, WAC 173-340-740 and WAC 173-340-745 calculations, inhalation correction -
1995-11-01EXH AR023140: Guidance Remediation Petroleum Contaminated Soils
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. -
1993-11-24Exhibit 2126: Implementation Memo No. 3 — PQLs as Cleanup Standards
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 -
1993-11-24EXH AR017345: Ecology Implementation Memo No. 3 — PQLs as Cleanup Standards
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