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Toxics Cleanup Program Policy 310A: Initial Investigations

Publication number Date Published Date Revised
09-09-050January 1993December 2009
VIEW NOW Toxics Cleanup Program Policy 310A: Initial Investigations (Number of pages: 16) (Publication Size: 1287KB)
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Author(s) Toxics Cleanup Program
Description This policy provides guidance for the initial investigation process set forth in the Model Toxics Control Act (MTCA) Regulation, WAC 173-340-310. It also includes two attachments: 1) Initial Investigation Site Visit Safety and Health Checklist, and 2) Initial Investigation Field Report.

The purpose of an initial investigation is to determine whether a release (or threatened release) of a hazardous substance may have occurred that warrants further action under MTCA. The initial investigation also provides the initial investigator with an opportunity to encourage cleanup of easily remediated releases.

As part of the initial investigation, the investigator must also begin the process of identifying potentially liable persons (PLPs). For guidance on identifying PLPs, see Procedure 500A (formerly Procedure 500B) titled, “Identification of Potentially Liable Persons,” publication no. 16-09-051.

REVISION NOTE: This policy became effective January 5, 1993, and was revised December 17, 2009. In September 2018, we formatted the document, added Americans with Disabilities Act (ADA) language, and cataloged it in Ecology’s publications database. With the exception of ADA language, content of this policy did not change since it was revised December 17, 2009.
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 at 360-407-7170
Keywords Site Hazard Assessment (SHA), Initial investigation (II), Model Toxics Control Act (MTCA), vapor intrusion, Reporting Releases
WEB PAGE Policies and guidance for site cleanups

Toxics Cleanup Program Policy 310B: Creating or Changing the Name, Address, or Identification Number for a Facility or Site

Toxics Cleanup Program Policy 500A: Identification of Potentially Liable Persons

Toxics Cleanup Program Procedure 500A: Identification of Potentially Liable Persons