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PUBLIChEALTHSERVICES <br /> PQU1N <br /> SAN JOAQUIN COUNTY ui�6 <br /> ENVIRONMENTAL HEALTH DIVISIONErnest 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 /> 2091468-3420 <br /> TARA LYNCH 7 <br /> MOBIL BUSINESS RESOURCES CORPORATION <br /> 3225 GALLOWS ROAD ROOM 5W317 <br /> FAIRFAX VA 22037 <br /> RE: Former Mobil Bulk Plant SITE CODE: 1968 <br /> 500 East Grant Line Road <br /> Tracy CA 95376 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has <br /> completed review of the "Quarterly Progress Report" dated October 10, 1996 that was <br /> prepared by Alton Geoscience. PHSIEHD has prepared the following comments for your <br /> consideration and response. <br /> The report included the results of the July 25, 1996 groundwater sampling event which <br /> indicated residual diesel groundwater contamination. The California Secondary MCL for <br /> Taste and Odor was exceeded for the TPH-diesel contamination detected. Additionally, <br /> groundwater samples were collected during the fourth quarter of 1996 and during the first <br /> quarter of 1997. <br /> PHSIEHD, in correspondence dated September 9, 1996, requested that since dissolved <br /> oxygen concentrations were being monitored, at the time of sampling, that the results be <br /> included in table format. The progress report failed to tabulate the dissolved oxygen <br /> results. <br /> PHSIEHD in correspondence dated September 9, 1996 requested that a closure summary <br /> report be submitted to both PHSIEHD and to the Central Valley Regional Water Quality <br /> Control Board (CVRWQCB). Please proceed with efforts to prepare a closure summary <br /> report. The closure summary report may include the results of the first quarter's analytical <br /> results. Once the closure summary report has been reviewed and deemed complete by <br /> PHSIEHD and the CVRWQCB, PHSIEHD will request that you submit a work plan for the <br /> destruction of monitoring wells, following which no further action fetters will be issued. <br /> If you have any questions regarding the contents of a closure summary report, please do <br /> not hesitate to contact me at (209) 468-0337. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Mary Meays, Senior 491iS Margar Lagorio, �RS <br /> Site Mitigation Unit Supervisor J <br /> 1 <br /> MM1500EGL <br /> cc: Joel Weiss, CVRWQCB <br /> cc: Ailsa S. Le May, Alton Geoscience <br /> A Division of San Joaquin County Health Care Services <br />