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PUBLIC *HEALTH SERVICES <br /> SAN JOAQUIN COUNTY p4U N <br /> ENVIRONMENTAL HEALTH DIVISION y <br /> Ernest M. Fujimoto, M. D., M.P.H., Acting Health Officer <br /> 304 E. Weber Ave., Third Floor • P. O. Box 388 • Stockton, CA 95201-0388 <br /> 209/468-3420 L '��J u tr <br /> DAVID CAMILLE <br /> UNOCAL CORPORATION SEP 13, X99 <br /> PO BOX 5155 <br /> SAN RAMON CA 94583 <br /> RE: Unocal Service Station #6981 SITE CODE: 1217-123 <br /> 4707 Pacific Avenue <br /> Stockton CA <br /> San Joaquin County Public Health Services, Environmental Health Division <br /> (PHS/EHD) has completed review of the GeoStrategies "Second Quarter 1996 <br /> Status Report" dated August 9, 1996 and your correspondence dated July 25, <br /> 1996. PHS/EHD has prepared the following comments for your consideration. <br /> Thank you for instructing the laboratory to report to lower quantification limits for <br /> methyl tertiary butyl ether. <br /> The City of Stockton has completed the Phase I construction work for the March <br /> Lane/Pacific Ave intersection project that was scheduled in August 1996. <br /> According to Ray Deyto of the City of Stockton Public Works Department, the next <br /> phase of construction will begin Spring 1997. <br /> As further construction on the intersection project is not anticipated in the near <br /> future, installation of the additional monitoring wells should proceed. The <br /> monitoring wells should be placed strategically to minimize the number necessary <br /> to characterize the groundwater plume and should be properly screened to reflect <br /> current groundwater conditions. A work plan to install the additional monitoring <br /> wells should be submitted by November 1, 1996. <br /> PHS/EHD requested last year that a comprehensive remediation annual report be <br /> submitted. The vapor extraction system was not operated for many months in <br /> 1995. An annual summary report that evaluates the system should be submitted <br /> by December 31, 1996. <br /> A Division of San Joaquin County Health Care Sere ices <br />