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Mr. Ed Ralston - 2 - 23 July 2010 <br /> Former Union Oil Bulk Plant, Tracy <br /> 3. Central Valley Water Board staff concurs with the proposal to collect an additional round <br /> of soil gas samples about three months after backfilling the excavation and analyze them <br /> for petroleum hydrocarbons. <br /> In summary, by 17 December 2010, please excavate the area around SG-8 and SG-11, collect <br /> soil confirmation and soil gas samples, analyze all the samples for petroleum hydrocarbons, and <br /> submit a report of findings. If you have any questions, you may contact me by at (916) 464- <br /> 4819 or by email at kshelton(a-)waterboards.ca.gov. <br /> KRISTI SHELTON, P.E. <br /> Water Resources Control Engineer <br /> Aboveground Tanks Cleanup Unit <br /> cc: Ms. Adrienne Ellsaesser, San Joaquin County Environmental Health Department, Stockton <br /> Mr. Mark Bare, Stantec Consulting Corp., Rancho Cordova <br />