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' 0'- 05/2003 12 36 2094683e` FIFTH FLOOR PAGE 0- <br /> ENVIRONMENTAL HEALTH DEPARTMENT <br /> 1-11 AN JOA UIN COUNTY <br /> J ,G, <br /> Donna K Herdrat Supervisors <br /> rin,R.E H.S <br /> t Director 304 East Weber Avenue,Third Floor Carl Borgrnan,R E I.1 s <br /> AI Olsen,R.E H,5 Stockton California 9520' -2708 Mike Huggins at E x s R D I <br /> ° Do4glas W Wdson.RE H S <br /> FrA Ca ulla,PLE Telephone (209) 463-3420 Margaret Lagono,R S H S <br /> Laune.� Catulis,RE,H,S. <br /> Program Adanager Fax. (209) 464--0138 R6bert iMcClellon RE H S <br /> Mark Baroel Jos,RE I-1 5 <br />' DA$IN ROUSE 'JAN 2 7 2003 <br /> RXXoNm0BXL REFXNXNC AND SUPPLY COMPANY' <br /> FO Box 4032 <br /> ICONCORD CA 94524-4032 <br /> R8 Former Exxon Retail site 7-3942 SITE CODE- 2231 <br /> 4443 North Pershing Avenue <br /> IStockton, CA <br /> San Joaqu3.n County Bnvi,ronmental Realth Department (zmD) is the lead agency <br /> providing the oversight o£ the investigation and cleanup of releases from <br /> underground storage tanks (UST) within San Joaquin County MM has a contract <br /> with CaZi£ornaa State Mater Resources Control. Board (SWRCB) to conduct an LIST <br /> corrective action program <br /> Gasoline contamination was documented at the time of UST removals in July 1956 <br /> at the above referenced address An Unauthorized Release Report was filed -Ln <br /> September 1986 and a groundwater investigation began in 7anuary 1987 over the <br /> course of the investz,gation, liquid-phase petroleum hydrocarbons have been <br /> evidenced in on site wells The site was placed ars the Local Oversight Program <br /> in 4'pr11 1969 sail and groundwater remediation began in 1994 utsllZing vapor <br /> extraction in con3unction with air sparging In 1996 a vacuum vaporizer well <br /> system, Underdruck Verdampfer Hrunten (UVB) , was installed It was operated <br /> from February 6, 1397, until September 22, 2000. No remediation has takers <br /> place since the UVB was inactivated <br /> On April-17, 2402 EFm and CVRWCCB staff met with ETSC on behalf of Sxxor.Mobil, <br />' Topics discussed at the meeting were <br /> 3 Site history and current groundwater contaminant concentrations <br /> 2 PHS/EHD denial of ETIC recommendat:.on for no further action based <br /> upon rLsk-based corrective action (RSCA) analysis <br /> I 3 The need to perform additaanal/continued groundwater cleanup <br /> 4 The required vertical definition of the groundwater plume <br /> 5 Groundwater remedial alternative fol- corrective action at this site <br /> I No work plan (WP) to continue with groundwater remediation and assess vertical <br /> Contaminant limits has been received by SM to date Please Qubmit a WP to EKD <br /> by February 24, 2003 <br /> if you have any further questions regarding this matter, please contact F arli;l <br /> K.z011 at (209) 468-3442 <br /> Donna Heran, =S, Director <br /> Environmental Health Division <br /> Harlin 11noll, Senior REHS Nual C Henderson Jr , RG <br /> LOP/Site Mitigation Unit, TV LOP/Site mitigation Unit IV <br /> • cc CRw(�CB-James L L 3arton - <br /> I ti TIC-Ted Moise <br /> Hank of Stockton-Rick Correia (( <br /> ' { FA~ <br />