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i <br /> Mr. Tracy Sizemore <br /> Mr. Thomas Bauhs <br /> July 13, 2005 <br /> Page 2 <br /> DTSC received Earth Tech's electronic mail correspondence dated July 12, 2005. In <br /> this correspondence, Earth Tech agreed with the comments outlined in HERD's <br /> June 27, 2005 memorandum. Based upon this response from Earth Tech, DTSC <br /> approves of the Soil Vapor Sampling Work Plan. This approval is for the installation of <br /> soil vapor sampling equipment and collection and analyses of soil vapor samples <br /> related to the completion of the site Human Health Risk Assessment. Please note that <br /> approval from the Regional Water Quality Control Board must be received prior to <br /> startup of the Soil Vapor Extraction system at the L&M OU site. <br /> During the teleconference call on June 29, 2005 it was agreed that once Earth Tech <br /> submitted their response to HERD's February 2, 2005 memorandum (a memorandum <br /> that synopsized HERD's September 9, 2004 HRA comment memorandum and added a <br /> Data Gaps table) and DTSC reviews the response, a meeting will be held to discuss the <br /> status of the Human Health Risk Assessment (HHRA). This meeting will be organized <br /> by DTSC for early or mid-August, 2005. Once the HHRA meeting takes place a <br /> response letter will provided by DTSC. <br /> If you have any questions on any of the information provided above, please contact me <br /> at (916) 255-3744 or by email at ilile(a)dtsc.ca.gov. <br /> Sincerely, a6 <br /> Jerry?e <br /> e <br /> Project Manager <br /> Enclosures <br /> cc: Mr. Ray Kaminsky <br /> Environmental Chemist <br /> Earth Tech <br /> 695 River Oaks Parkway <br /> San Jose, California 95134 <br />