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Mr. Brian Duggan 2 _ <br /> • 11 February 2014 <br /> Soil vapor investigation <br /> CPS proposes to obtain four soil vapor samples from a depth of about five feet bgs from four <br /> locations. The vapor samples will be analyzed for 1,2-DCP and 1,2,3-TCP using the TO-15 <br /> analytical suite. Two sample locations are between the highest concentrations of these volatile <br /> compounds and the nearest residences, one location is where employees work outside near <br /> t to a builin <br /> subsurface pollution,ear wellt <br /> tchosen to identify f hulmannexposureto go employeesre <br /> he other location is e compounds are <br /> k. <br /> app a <br /> The locations appear <br /> concern. the <br /> is has a <br /> ng <br /> lle the TO-I 5 detect os nn limitvery near the screening limit <br /> uman <br /> health <br /> en ng <br /> thevalues. Therefore, CPS shouldreport all gflagged <br /> detections. <br /> Conditional Concurrence <br /> concur w <br /> estimCentraated Valley <br /> Water <br /> soil vapor staff <br /> conditionally reported. ith the Work Plan provided that al <br /> es <br /> tections <br /> Schedule <br /> CPS intends to implement the Work Plan by 21 March 2014, and provide a report of results by <br /> 25 July 2014. <br /> If you have any questions, you may contact me by telephone at (916) 464-4680 or by email at <br /> Amy.iTERELL, <br /> @wat :rboards.ca.gov. <br /> m// <br /> Y P.E. <br /> Federal and Private Sites Cleanup Unit <br /> cc: Mr. Nuel Henderson, San Joaquin County.Environmental Health Dept., Stockton <br /> Mr. Robert Jackson, Crop Production Services, Loveland, CO <br /> Mr. Todd Leonard, Rubik Environmental, Reno, NV <br />