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Implementation Memorandum No. 23: Concentrations of Gasoline and Diesel Range Organics Predicted to be Protective of Aquatic Receptors in Surface Waters

Publication number Date Published Date Revised
19-09-043March 2019August 2021
VIEW NOW Implementation Memorandum No. 23: Concentrations of Gasoline and Diesel Range Organics Predicted to be Protective of Aquatic Receptors in Surface Waters (Number of pages: 25) (Publication Size: 493KB)

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Author(s) Arthur Buchan, Toxics Cleanup Program
Description This memo contains technical information for site managers who clean up contaminated sites. It is geared for cleanups happening near streams, lakes, and oceans, with information that helps protect the aquatic animals living there.

The document provides gasoline and diesel range organic concentrations that are predicted to be protective for environmental effects in marine and fresh surface waters at any Model Toxics Control Act (MTCA) cleanup site.

The MTCA regulation (also known as the MTCA Cleanup Rule) (Chapter 173-340 WAC) contains surface water cleanup standards. When you establish Method B or Method C surface water cleanup levels for gasoline or diesel that are protective for environmental effects under WAC 173-340-730(3)(b)(ii) or (4)(b)(ii), you may either:

1. Use the concentrations specified in this document; or
2. Establish concentrations using the protocols described in Chapter 173-205 WAC, Whole Effluent Toxicity Testing and Limits.

As an alternative to the values presented in this document, you may use the protocols in Chapter 173-205 WAC, Whole Effluent Toxicity Testing and Limits to establish a site specific protective concentrations.

This memo was released on Thursday, March 7, 2019 and was available for public comment through Friday, May 10, 2019. In August 2021, we finalized it based on comments received during the draft memo’s public comment period.
The mission of the Department of Ecology is to protect, preserve, and enhance Washington’s environment. To help us meet that goal, please consider the environment before you print or request a copy.

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Contact Policy & Technical Support Unit, Toxics Cleanup Program at 360-407-7170
Keywords Aquatic Biota, Vapor Intrusion pathways, Protective concentrations, weathered diesel, saltwater, fish, cleanup, model toxics control act, MTCA, marine, freshwater, gasoline, Cleanup Rule, Crustaceans, Protective levels, Method B, Diesel organic range, Surface waters
WEB PAGE Policies and guidance for site cleanups

Guidance for the WDOE NWTPH-Dx Method for Testing Groundwater: Silica Gel Cleanup Protocol Revision

User’s Guide for MTCATPH 12.0 & MTCASGL 12.0: Workbook tools for calculating soil and groundwater cleanup levels under the Model Toxics Control Act Cleanup Regulation

Environmental Effects-Based Concentrations for Weathered Diesel-Range Organics: Toxicity in Marine Water and Freshwater

Environmental Effects-Based Concentrations for Total Petroleum Hydrocarbons (TPH): Toxicity in Marine Water and Freshwater

Implementation Memorandum No. 19: Gasoline and Diesel Soil Concentrations Predicted to be Protective of Upland Ecological Receptors

Model Toxics Control Act Regulation and Statute: MTCA Cleanup Regulation Chapter 173-340 WAC, Model Toxics Control Act Chapter 70.105D RCW, Uniform Environmental Covenants Act Chapter 64.70 RCW