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u <br /> PUBLIC HEALTH SERVICLS <br /> SAN JOAQUIN COUNTY Q <br /> ENVIRONMENTAL HEALTH DIVISION ". ` <br /> Karen Furst, M.D ., M.P.H., Health Officer <br /> q � FORS\ <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95 O <br /> 209/468-3420 <br /> GARY STALLWORTH LEWIS STALLWORTH <br /> 602 N CALIFORNIA ST 1107 BURKETT AVE <br /> STOCKTON CA 95202 STOCKTON CA 95205 <br /> l RE : Stallworth Auto Sales SITJ 4 0 AWp( :2006486 <br /> i 602 N California Street <br /> j Stockton CA 95202 <br /> i <br /> 1 San Joaquin County Public Health Services , Environmental Health Division (PHS/EHD) has <br /> reviewed the 'Preliminary Site Assessment Work Plan" dated December 22 , 1999 that was <br /> submitted by Advanced GeoEnvironmental , Inc. (AGE) on behalf of the above referenced site <br /> and has the following comments. <br /> The work plan proposes to begin the investigation of this site with a series of three direct push <br /> soil borings to collect soil and grab groundwater samples for analysis. The proposed depth of <br />{ the borings is 30-feet below surface grade (bsg) , or until field observations from two consecutive <br /> I five-foot soil samples indicate that the extent of the contamination may have been found . The <br /> exact depth to groundwater at this location is unknown , but based on information from nearby <br /> sites it is not expected to be greater than 40-feet bsg . Should groundwater not be encountered <br /> before 30-feet bsg or the end of the borings , it is the request of PHS/EHD that the boring <br /> located nearest the former location of tank #3 is extended until a groundwater sample can be <br /> collected . Soil and groundwater samples will be analyzed for total petroleum hydrocarbons as <br /> gas (TPHg) and TPH as diesel by EPA Method 8015 , benzene, toluene , ethylbenzene and <br /> xylene (BTEX) and methyl tertiary butyl ether (MTBE) by EPA Method 8020, and all fuel <br /> oxygenates by EPA Method 8260. Please note that the Regional Water Quality Control Board , <br /> Central Valley Region (CVRWQCB) has requested that all sites test for the lead scavengers <br /> EDB and 1 , 2-DCA by EPA Method 8260 prior to requesting site closure . <br /> Should contaminant impact to groundwater be evidenced during the initial investigation , three <br /> groundwater-monitoring wells will be installed on site. Proposed locations of the monitoring <br /> wells will be based on the analytical results from the initial investigation , and will be presented to <br /> PHS/EHD in a letter/report prior to installation . <br /> The work plan as outlined above is approved . Please proceed with submittal of a well permit <br /> application and required $89. 00 permit fee , and with scheduling the work. If you have any <br /> questions please call Lori Duncan at (209) 468-0337 . <br /> Donna Heran , REHS , Director <br /> Environmental Health Division <br /> Cl l�.c 4w t h <br /> LoriDuncan , Senior REHS Marga oI REFIS <br /> LOP/Site Mitigation Unit IV Supervisor, Unit IV <br /> cc: Marty Hartzell , CVRWQCB <br /> Brian Millman , AGE <br /> A Division of San Joaquin County Hearth Care Services <br />