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FILE COPY <br /> PUBLIC H?ALTH SERVICIS oP .� .�o <br /> SAN JOAQUIN COUNTY ` <br /> ENVIRONMENTAL HEALTH DIVISION ` <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 209/468-3420 <br /> APR 17 2000 <br /> GENE GABBARD <br /> P O BOX 1260 <br /> STOCKTON CA 95212 <br /> RE: Gene Gabbard, Inc. SITE CODE: 1090 <br /> 640 N. EI Dorado Street <br /> Stockton CA 95202 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) <br /> has reviewed the Additional Subsurface Investigation Summary Report dated April 4, <br /> 2000 that was submitted by Ground Zero Analysis, Inc. (Ground Zero) on behalf of the <br /> above referenced site and has the following comments. <br /> The report documents the completion of the initial soil and groundwater investigation at <br /> this site. Results of the investigation indicate that significant petroleum hydrocarbon <br /> contamination has impacted both soil and groundwater in the vicinity of a former waste <br /> oil tank on site. Soil contamination appears to be limited to 31-feet below surface grade <br /> (bsg) vertically, and to less than 30-feet laterally to the north, east and south. Soil <br /> contamination has not been defined to the west of the source area. The groundwater <br /> plume has not been completely defined laterally or vertically. <br /> The report recommends the installation of four groundwater-monitoring wells on site. <br /> PHS/EHD concurs with this recommendation. Please prepare a work plan to proceed <br /> with this next phase of work and submit it to PHS/EHD by June 2, 2000. Please note <br /> that the San Joaquin County Well Standards must be adhered to when constructing <br /> wells in this county. If you have any questions call Lori Duncan at (209)468-0337. <br /> Donna Heran, RENS, Director <br /> Environmental Health Division <br /> Lm 1n G( 1 <br /> Lori Duncan, Senior REHS Margar�Lagon&S <br /> LOP/Site Mitigation Unit IV Supervisor, Unit IV <br /> cc: Marty Hartzell, CVRWQCB <br /> John Lane, Ground Zero <br /> A Division of San Joaquin County Health Care Services <br />