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Shell Branded Service Station page 2 <br /> 3011 W. Ben Holt Drive, Stockton. <br /> Work plan comment/approval letter. <br /> COMMENTS AND CONDITIONS (continued): <br /> • Shell is directed to sample and analyze `core wells' ground water samples <br /> for 1,2-DCA by EPA 82608 for at least one annual period (four consecutive <br /> quarters) and the peripheral wells (except MW-13) annually (once). After <br /> valid laboratory data (including a detection limit of 0.5 ug/l, unless <br /> warranted otherwise by lab director) supports a 'non-detect' conclusion, <br /> SJCEHD will evaluate a request that "no further analysis for 1,2-DCA be <br /> performed". <br /> • MWA3 (proposed) ground water samples shall also be analyzed for 1,2- <br /> DCA and Acetone, as well as all core well constituents for at least two <br /> consecutive quarters, starting with the first sampling event after <br /> installation. Detectable amounts of any constituent in MW-13 or 'non- <br /> detects' at unwarranted elevated detection limits will require that/those <br /> constituents to be continually analyzed for and MW-13 to be included in <br /> the 'core well' protocol of quarterly sampling. <br /> • Report of findings is to be in the context of a Site Conceptual Model <br /> constructed from all available data for the site. Cross sections and <br /> lithological interpretations are to be extended to include MW-13 data. <br /> • Submit Well Permit Application Form and fee immediately. Include <br /> updated copy of private parcel access agreement with submittals. <br /> REASONS FOR DISAPPROVAL OF THE WORK PLAN [H&S 25296.10, <br /> subd(c)(3)1: <br /> • none. <br /> DATED: January 5, 2005. By: <br /> Michael Infurna, Sen)Or REHS (209) 468-3454 <br /> [ X ]Faxed to consultant on: 1-05-05. <br />