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Title

Guidance for Silica Gel Cleanup in Washington State

 
Publication number Date Published Date Revised
22-09-059September 2022November 2023
VIEW NOW Guidance for Silica Gel Cleanup in Washington State (Number of pages: 47) (Publication Size: 1370KB)
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Author(s) Andrew Kallus; Charles San Juan
Description This guidance document provides details on the use of silica gel cleanup (SGC) in analyzing diesel and heavy oil range organics when using the Ecology’s NWTPH-Dx analytical method for petroleum hydrocarbons at a cleanup site regulated under the Model Toxics Control Act (MTCA) Regulation, Chapter 173-340 WAC. SGC refers to a sample cleanup step in the analytical process where silica gel is used. Silica gel is a polar material that is used to adsorb (i.e., remove or cleanup) non-hydrocarbon polar organics during the sample extraction process).

REVISION NOTES:

November 2023: Published final guidance
September 13, 2022 – October 13, 2022: Draft open for public comment.
September 2022: Draft guidance published


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Contact Andrew Kallus at 360-878-2952 or andrew.kallus@ecy.wa.gov
Keywords Diesel Range Organics (DRO), groundwater sampling, Total Petroleum Hydrocarbons (TPH)., Total Petroleum Hydrocarbons (TPH) analysis, biodegradation, Heavy Oil Range Organics (ORO), NWTPH-Dx analytical method, polar organic compounds, Silica Gel Cleanup (SGC), weathered groundwater, polar metabolites
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