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Mr. Donald Rodgers . - 2 - • 1 December 2008 <br /> 515 West Charter Way, Stockton, San Joaquin County <br /> testing will be submitted within 45 days after a yet to be determined date for a meeting with Regional <br /> Board staff, to present preliminary data and discuss the results. <br /> The Workplan is conditionally approved as follows: <br /> • The helium tracer shall be injected to determine ZOI only if there is no evidence for increases in <br /> water levels or DO levels during testing. In other words, the entire test procedure will be run to <br /> completion, and if there is no evidence of"movement of injected air or gas", then you are to <br /> notify me by email or phone message (voice mail)that the tracer has been used. <br /> • For comparison sake, a DO consumption test should also be conducted if DO levels rise above <br /> 2 mg/L in the farthest well during the AS testing. If you disagree with this recommendation, <br /> then provide additional technical justification stating why not, prior to start of the testing. <br /> • The Workplan did not include a schedule for the fieldwork. Please provide a schedule with <br /> dates proposed for each activity by email to me within one week of receipt of this letter. <br /> • I do not see the necessity for a meeting to present test findings, since this exercise is mainly an <br /> extension of the prior BioS pilot test and the AS technology is straight forward. The report of <br /> the testing is due 45 days after completion of the fieldwork. However, you may contact me by <br /> email or phone to discuss the project before submitting the report, if you desire. <br /> Please acquire all necessary permits and clearances to proceed with construction of the new air line <br /> and testing, and also give me at least three working days notice prior to starting fieldwork. If you have <br /> any questions you may call me a <br /> t (916) 464-4615, or email me at jbarton@waterboards.ca.gov. <br /> T14-1 <br /> ?ames'L. L. Barton, P.G. <br /> Engineering Geologist <br /> cc: Mr. Mark Owens, UST Cleanup Fund, SWRCB, Sacramento <br /> Ms. Margaret Lagorio, San Joaquin County Environmental Health Department, Stockton <br /> Mr. Charles Metzinger, Shaw Environmental, 1326 North Market Blvd., Sacramento 95834 <br />