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PUBLIC HEALTH SERVES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION =` <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officer <br /> 445 N. San Joaquin Street • P.O. Box 388 o Stockton, CA 95201-0388 <br /> (209) 468-3420 <br /> w <br /> MICHAEL KARVELOT <br /> QUIK STOP MARKETS <br /> P O BOX 5745 <br /> FREMONT CA 94537 JUN 2 2 1994 <br /> RE: QUIK STOP #120 SrM CODE: 1261 <br /> 9321 THORNTON ROAD <br /> STOCKTON CA <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has received the <br /> letter request for a reduction of groundwater sampling frequency from,semi-annual to annual. <br /> Due to nondetectable levels of hydrocarbons in groundwater samples'collected from the site since 1991, it <br /> appears annual sampling of the groundwater is sufficient at this time. Please be advised that the frequency <br /> of sampling may be modified should future site conditions warrant. <br /> As a reminder, in order for PHS/EHD to evaluate this site for closure,confirmation soil borings are needed <br /> in the areas of concern as discussed in a April 15, 1993 letter from PHS/EHD to you. A mass volume <br /> determination on any residual hydrocarbons detected in the confirmation soil borings should be conducted. <br /> Modeling may need to be performed on any soil contamination found to be remaining to indicate the possible <br /> future impact to groundwater. PHS/EHD and the Central Valley Regional Water Quality Control Board will <br /> evaluate this information to determine if the beneficial uses designated for groundwater in this area are <br /> protected in the future. <br /> If there are any questions, or if you would like to discuss this letter in;detail, please contact Linda Turkatte <br /> at (209) 468-3441. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Linda Turkatte, Senior REHS Diane ns n, REHS <br /> Site Mitigation Unit Supervisor <br /> LT <br /> c: CVRWQCB-Beth Thayer !i <br /> c: RESNA-Richard Garlow <br /> c: Edward Yang <br /> A Division of San Joaquin County Health Care Services <br />