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Washington Cleanup
Standards for Hydrocarbon Contaminated Groundwater
*Not specified by contaminant. See WAC 173-340-300 for release reporting requirements (available on the web site). ** Test Specific. *** Based on benzo(a)pyrene These are Method A cleanup levels for Ground Water. This table has been developed for specific purposes. It is intended to provide conservative cleanup levels for drinking water beneficial uses at sites undergoing routine cleanup actions or those sites with relatively few hazardous substances. This table may not be appropriate for defining cleanup levels at other sites. Site specific cleanup levels can be calculated for Method B (unrestricted uses) and Method C (restricted uses) including GRO and DRO using a surrogate/fraction approach. All pathways must be evaluated for Methods B and C including ingestion, vapor, and impact to surface water. Free product is not permitted. The user should check the applicable entries and footnotes in the Method A Tables and the Required Testing for Petroleum Releases Table as well as other pertinent sections in WAC 173-340. NWTPH, hydrocarbon identification (HCID), and surrogate/fraction analytical methods are available in Ecology Publication # ECY 97-602 (available on the web site). It is important to note that the uses of Methods B and C do not account for some applicable state and federal legal considerations. These methods also do not account for several health and ecological considerations regarding groundwater, soils and air. Contact: Hun Seak Park, Washington Department of Ecology, 360-407-7189 Web Site: www.ecy.wa.gov/programs/tcp/cleanup.html
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