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PUBLTIHEALTH SERYICES �a <br /> SAN JOAQUIN COUNTY r. <br /> H: :t <br /> JOGI KHANNA M.D.,M.P.H. <br /> Health Officer <br /> P.O. Box 2009 • (1601 East Hazclton Avenue) • Stockton,California 95201 <br /> �q�iFp'Ra; <br /> (209) 4653400 <br /> UNOCAL CORPORATION <br /> BOB BOUST MAY 17 1993 <br /> P O BOX 5155 <br /> SAN RAMON CA 94583 <br /> RE: FORMER UNOCAL SS/12859 SITE CODE: 1213 <br /> 1665 PACIFIC AVENUE; STOCKTON <br /> San Joaquin County Public Health Services, Environmental Health Division <br /> (PHS/EHD) has completed review of the "Letter Report Ground-Water Monitoring <br /> First Quarter 1993" as prepared by Resna dated April 20, 1993 for the above <br /> referenced site. <br /> At this time, there is no evidence to support off-site contributing sources. <br /> Both monitoring well (MW) 2 and MW 6 are within distance from the pipeline and <br /> dispenser islands and historical data researched from previous investigative <br /> reports indicate soil contamination in the former waste oil tank area <br /> (Kleinfelder, 1988) . Boring log B-4 denoted hydrocarbon odors at depths of 20-26 <br /> feet. <br /> Additionally, in the May 1990 Applied Geosystems report, the groundwater total <br /> petroleum hydrocarbon concentrations were mapped. The data recently gathered <br /> from MW 6 can easily complete the southeasterly portion of the map, thus <br /> dismissing the illusion of off-site influences. <br /> The data gathered to date is sufficient for Unocal to prepare a proposal for <br /> remediation for the site's restoration. <br /> The site has undergone several personnel transitions since 1991 within the Unocal <br /> Corporation and within the Resna Industry (Applied Geosystems) . A meeting has <br /> been scheduled for June 9, 1993 at 2:00 p.m. so that the perspective on the <br /> site's restoration can be discussed and to provide an opportunity for all parties <br /> to meet. <br /> i <br /> Please contact Diane Hinson, Supervising R.E.H.S. at (209) 468-3452 to confirm <br /> the meeting date and to discuss the items in this letter. <br /> Jogi Khanna,,-M.D. , M.P.H. <br /> Health Officer <br /> aurie A. Cotul a, RENS, ogram Mana er <br /> Environmental Health Division <br /> LAC/dmh <br /> c: Helen K. McCrary <br /> CVRWQCB <br /> Resna, Greg Gurss <br /> A Division of San Joaquin Caonry health rare semccs �� <br />