Transcription of Soil Gas Sampling: A Practical Perspective - handpmg.com
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Soil Gas Sampling: A Practical Perspective - handpmg.com
Soil gas sampling : A Practical Perspective Theo Johnson Geological Services Unit Department of Toxic Substances Control September 25, 2012 DOCUMENT OVERVIEW Combines 2003 Advisory and 1997 LARWQCB 1997 Interim Guidance for Active Soil Gas Investigations into one comprehensive document Incorporates over 450 comments from consultants WHY SOIL GAS? Measure the extent of vapor phase contaminants Use in combination with conventional sampling to delineate VOC contamination Soil matrix type (gravel, sand, silt, clay) Reduces volatilization and biodegradation potential Real time decisions Time and cost 2012 Advisory Expanded workplan section Addition of Site Conceptual Model (CSM) Purpose of CSM Basic components in a CSM Elements of the Workplan Report section Assess and revise CSM Identify data gaps based on revised CSM 2012 Advisory Provides investigation fl
SOIL GAS ASSEMBLY TESTS •Leak Test –Leak check evaluation •A soil gas well should be decommissioned if the leak cannot be corrected. Replacement soil gas
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