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'6 <br /> Department of Toxic Substances Control <br /> Barbara A. Lee, Director <br /> Matthew Rodriquez 1515 Tollhouse Road Edmund G.Brown Jr. <br /> Secretary for Governor <br /> Environmental Protection Clovis, California 93611 <br /> January 07, 2015 <br /> Ms. Sharron L. Reackof tl ' a <br /> Project Manager <br /> Pacific Gas and Electric Company <br /> 3401 Crow Canyon Road <br /> San Ramon, CA 94583 <br /> DRAFT POST-REMEDIATION SOIL GAS SAMPLING WORKPLAN, FORMER LODI <br /> MANUFACTURED GAS PLANT <br /> Dear Ms. Reackhof: <br /> The Department of Toxic Substances Control (DTSC) has reviewed the above <br /> referenced December 15, 2014 Draft Post-Remediation Soil Gas Sampling Workplan <br /> (Workplan). The Workplan proposes collecting active soil gas samples at eight select <br /> locations within the former manufactured gas plant. Each sampling location will consist <br /> of two sampling probes set at variable depths. Samples will be analyzed for volatile <br /> organic compounds including naphthalene. <br /> Soil gas sampling will be conducted in accordance with the April 2012 Advisory—Active <br /> Soil Gas Investigation document published jointly by DTSC, the Los Angeles Regional <br /> Water Quality Control Board, and the San Francisco Regional Water Quality Control <br /> Board. <br /> DTSC concurs with and approves of the Workplan. In the event that sampling results <br /> indicate adverse soil gas conditions, DTSC may request additional sampling to further <br /> characterize soil gas conditions. <br /> Please contact me at (559) 297-3907 or at '!ff.gymera dt! g ;g2y if you have any <br /> questions. <br /> JG:srnk <br /> JG02.0115 <br />