Draft TGM Update, Section 7: Large-Volume Purge Vapor SamplingPosted on Sep 1, 2017 in All, Latest Technical Guidance
Updates to Section 7 of the HEER Office Technical Guidance Manual for soil vapor sample collection have been posted for public review. The updates primarily address the incorporation of Large Volume Purge (LVP) sampling methods for testing of sub-slab vapors and evaluation of vapor intrusion risk. Significant updates are highlighted in yellow in the text. The draft update and a PowerPoint presentation on LVP methods are posted to the HEER Technical Guidance web page. Comments and edits are requested by 10/31/2017.