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Revised Soil Gas Sampling er VVorkplan September 8,2017 <br />CA ARNG, FMS #24, Stockton, CA Page 8 <br />avoid loss or damage, the chain of custody forms should be placed into a sealable bag and <br />attached to the inside of the shipping container. <br />SOIL GAS PROBE DESTRUCTION <br />The well destruction procedures detailed in the California Well Standards (Bulletins 74-81 and <br />74-90) will be followed, along with SJCEHD requirements. The SJCEHD reportedly requires <br />wells to be over drilled and all well material to be removed. After sampling has been completed, <br />and upon approval by the CVRWQCB, the soil vapor wells will be decommissioned by over <br />drilling and backfill with cement grout and completed to match the surrounding grade. <br />WASTE MANAGEMENT <br />Investigation derived waste (IDW) generated during the well installation and over drill <br />decommissioning will include soil cuttings and well materials. All IDW will be segregated and <br />containerized in separate United Nations/Department of Transportation (DOT)-approved steel <br />drums and temporarily stored at a location agreed upon by CA ARNG onsite personnel. Each <br />drum will be sealed and clearly labeled. Laboratory analyses will be used to complete the waste <br />profiles submitted to an approved disposal facility. Upon disposal facility approval of the waste <br />profiles, the drums will be transported off site by a licensed waste hauler and disposed of at the <br />approved, licensed disposal facility. A waste manifest will be provided in a subsequent report. <br />REPORTING <br />A Soil Gas Sampling Report will be prepared and submitted to the CA ARNG and CVRWQCB. <br />This report will describe all field activities associated with the soil gas sampling. The report will <br />include all pertinent documentation (such as permits, tabulated analytical results, site maps, <br />waste-disposal documentation, laboratory reports, and chain-of-custody documentation) and will <br />be reviewed and signed by the California PG who supervised the project. A vapor intrusion risk <br />assessment is not included with this project. <br />Sincerely, <br />/j/-- <br />UtLe <br />Steve Elliott, PG <br />Senior Geologist <br />cc: MAJ Sonya G. Moore, CA ARNG <br />Mr. Brian Pierskalla, CA ARNG <br />Attachments: 1. References <br />2. Figures <br />Figure 1. Site Location Map <br />Figure 2. Site Map <br />Figure 3. Proposed Soil Gas Monitoring Probes <br />3 Historical Figures Prepared by ECM <br />4 Probe Design Schematic (DTSC, et al, 2015)