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#QM <br /> RESPONSE TO COMMENTS (December 2010) <br /> DRAFT WORK PLAN FOR GROUNDWATER MONITORING WELL INSTALLATION, SOIL GAS AND GROUNDWATER INVESTIGATION,AND <br /> GROUNDWATER MONITORING, October 2010 <br /> Army Aviation Support Facility, 2000 Stimson Road, Stockton, CA <br /> OTIE Contract Number: W91238-09-D-0017, DO 0004,Amendment 01 <br /> This document presents OTIE's Response to Comments(RTCs) from the Central Valley Regional Water Quality Control Board(CVRWQCB) regarding <br /> the above referenced Draft Work Plan (WP). <br /> * Doc. Source Section/Page Comment Response(Contractor) <br /> General Comments on Draft Work Plan from Marcus Pierce, CVRWQCB <br /> 1 WP CVRWQCB Figure 2 and The suspected wash rack, located due south of the During a site visit performed on October 14, 2010, MSG <br /> Figure 3 former 20,000 gallon USTs(Figure 4), appears to Pica confirmed the former wash rack and its <br /> coincide with the location of a secondary clarifier that was associated clarifier was historically located in the area <br /> plumbed to the main wash rack that was removed in the south of the former 20,000-gallon USTs. Figure 2 and <br /> early 1990's. The former secondary clarifier is depicted Figure 3 of the Work Plan were updated accordingly. <br /> on most investigation reports on the AAFS facility prior to <br /> 2008. Please confirm whether there was a wash rack or <br /> secondary clarifier south of the 20,000 gallon USTs and <br /> revise the Draft Work Plan, if necessary. <br /> 2 WP CVRWQCB Various The former USTs reportedly contained aviation fuels. Naphthalene is included in the suite of VOCs <br /> Naphthalene is a common component of aviation fuel, so associated with 8260B analyses. 8260B analysis will be <br /> samples from all media should be analyzed for performed on all collected samples.The text of the <br /> naphthalene as well as the proposed target compounds. Work Plan was updated accordingly. <br /> Revise the Draft Work Plan to include analysis for <br /> naphthalene in all phases of investigation as well as <br /> profiling soil cuttings and decontamination water for <br /> disposal. <br /> 3 WP CVRWQCB Table 1 ...provide a table with the Final Work Plan that includes Table 1 (Appendix B)has been added to the Work Plan <br /> all individual analytes that CANG proposes to test each indicating all analytes and test methods to be <br /> soil, groundwater, and soil vapor sample for. The new performed during the investigation and subsequent <br /> table should include the proposed test method for each groundwater monitoring. <br /> analyte. <br /> 1 <br />