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7-Eleven Store#14117 -2 = 4 October 2004 <br /> 2725 Country Club Blvd., Stockton <br /> • During the Pilot Study phase, groundwater sampling and analyses will be conducted immediately before <br /> each <br /> oxygen injection, and at,mtervals of one and 2 hours afterwards on each day of batch oxygen <br /> injection, in order to validate all contaminant(s) analyses.and proposed decay rates, if applicable. If a <br /> BST is not required prior to the Pilot Study, then analyze at least once before and after each oxygen <br /> injection. <br /> • Install a data logger in MW-1 to record changes in dissolved oxygen, H specific conductance an <br /> g Yg �P p d <br /> temperature during the Pilot Study. The test data will be helpful to determine the effectiveness of oxygen j <br /> injection. <br /> Please procure the appropriate drilling permit and give San Joaquin County Environmental Health Department <br /> and myself at least 3 working days notice prior to commencement of fieldwork. <br /> i <br /> You may call me at 916 464-4615 for questions or additional information. <br /> JAMES L.BARTON,R.G. <br /> I <br /> Engineering Geologist <br /> cc: Mr.Mark Owens,UST Cleanup Fund, SWRCB, Sacramento <br /> Mr.Mike Infuma, San Joaquin County Environmental Health Division, Stockton <br /> Mr. Jaff Aucherlonie and Mr. Daniel Davis, SECOR International Inc.,Rancho Cordova <br /> j <br /> e <br /> I <br />