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PUBLIC HEALTH SEV ICES <br /> AQU�N <br /> SAN JOAQUIN COUNTY r x <br /> ENVIRONMENTAL HEALTH DIVISION "'' _ ` <br /> Karen Furst, M.D., M.P.H., Health Officer \; <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202FIL <br /> I C 0 <br /> 2091468-3420 <br /> JAMES GIOTTONINI <br /> PUBLIC WORKS DIRECTOR SEP 2 11999 <br /> CITY OF STOCKTON <br /> 425 N EL DORADO <br /> STOCKTON CA 95202 <br /> RE: City of Stockton sites in the Local Oversight Program <br /> A meeting was held on September 13, 1999, at the office of San Joaquin County <br /> Public Health Services, Environmental Health Division (PHSIEHD). <br /> Representatives from the City of Stockton wee you and John Fukomoto. <br /> PHSIEHD representatives were Margaret Lag rio, Lori Duncan and Jeff Wong. <br /> The following is a summary of the site discussions and follow up comments by <br /> PHSIEHD. <br /> Fontana Drive at Smith Canal <br /> A pump test was performed on monitoring well 4 to evaluate whether free <br /> product could be drawn into the well or if groundwater could be lowered <br /> by pumping from this well. It was discussed that three push point borings <br /> with soil sample collection would be performed about 15 feet from this <br /> well. The information can be used in preparing a mass balance <br /> calculation of the contamination remaining in place and evaluation of <br /> excavation as a remedial alternative. <br /> 110 W. Sonora <br /> The air sparge/vapor extraction test we s performed. There was <br /> discussion about an apparent preferential pathway observed during the air <br /> sparge test and that remediation of MT BE may not be effective using this <br /> alternative. Levels of MTBE are low compared to the other gasoline <br /> constituents evidenced at this site sot is should be considered when <br /> evaluating remedial alternatives. A report of the air sparge/vapor <br /> extraction test is to be submitted to PHSIEHD. A Corrective Action Plan <br /> will be prepared. <br /> A Division of San Joaquin County Health Care Services <br /> i <br />