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M 4 <br /> PUBLYC HEALTH SERVICES xo� .�o <br /> SAN JOAQUIN COUNTY = y <br /> JOG KHANNA M.D..M.P.M. <br /> Health Officer <br /> P.O. Box 2009 • (160 I East Hazelton Avenue) • Stockton, California 95201 <br /> iFo'%iikt'� <br /> (209) 468-3400 <br /> r ..� , <br /> r <br /> 1 <br /> JERRY MOORE <br /> MOORE PETROLEUM <br /> P O BOX 67 AUG 2 1 1992 <br /> BANTA CA 95304 <br /> RE: Franks Exxon #4 SITE CODE: 1600 <br /> 14800 S. Hwy 99 <br /> Manteca, CA 95336 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) <br /> has reviewed the "Problem Assessment Report" (PAR) dated June 26, 1992, prepared by <br /> Aegis Environmental, Inc. for the above referenced site. <br /> The groundwater gradient has changed from north-northeast to southwest. in the <br /> "Preliminary Hydrogeologic Assessment Report" dated September 8, 1989, prepared by <br /> Delta Environmental, it was stated that there were 24 wells within a half mile radius of <br /> the site, but exact addresses and site map locations were not given. Aegis has initiated a <br /> complete inventory of these existing wells. This information should be provided and <br /> discussed in your next report. <br /> Testing of the on-site well has not been addressed. This well should be tested <br /> periodically for the same constituents as those tested for in the monitoring wells. <br /> Total petroleum hydrocarbons as diesel (TPH-d) were detected in the soil when the <br /> underground tanks were removed and has not been analyzed for in groundwater samples. <br /> At a minimum TPH-d should be added to the constituents analyzed for in groundwater <br /> samples colllected from monitoring wells 1-4. <br /> EDC was previously detected in monitoring wells 1-5 at levels above the "State Primary <br /> Maximum Contaminant Level" of .5 parts per billion. EDC has not been analyzed for <br /> since July 22, 1991. Analysis for EDC should continue in monitoring wells 1-5. <br /> The PAR dated June 26, 1992 states that the drill cuttings and purge water from <br /> monitoring well 9 was transported to an appropriate disposal facility. Please provide the <br /> name and location of these facilities in your next report. <br /> A Division of San Joaquin County Health Parc Services \0 <br />