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PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M. D., M.P.H., Acting Health Officer <br /> 304 E. Weber Ave. Third Floor * R Q. Box 388 • Stockton, CA 95201-0388 <br /> MAILED JAR 0 91996 2091468-3420 r�:� � 77 <br /> TOM MASON DAVID HEINRICH <br /> FEDERAL DEPOSIT INSURANCE CORPTEXACO RSM INC <br /> MAIL STOP J-658A-61 PO BOX 7549 5330 PRIMROSE 'DR STE 137 <br /> NEWPORT BEACH CA 92658-7549 FAIR OAKS CA 95628 <br /> RE* Togo`s Restaurant/Pormer Texaco Station SiteCode:: 9149 <br /> 305 South Hutchins Street <br /> Lodi, CA 95240 <br /> San Joaquin County Public Health Services, Environmental Health <br /> Division (PHS-EHL ) has recently received a request for further <br /> explanation concerning our evaluation of the site.. and th. <br /> investigation so far. <br /> Much concern f tm the FDIC regarding the groundwater :plume and <br /> its potential source has been addressed and PHS-EHD would like to. <br /> take this opportunity to address another concern. <br /> Based on previous soil samples and data from soil investigations <br /> throughout the site, PHS-EHD has. concluded that there are thx`e':e:: <br /> areas of sail contaminat on. that. need to be evaluated for <br /> continued impact: to groUdWater contamination. <br /> Of particular concern are soil contamination 1evelss found in <br /> borings GB-10/VW`-6 and sant GB-7;/VW-3 (Area sl , the general area <br /> at borings. GB-1.,: GB-8/ :-4::, ;SB-8, DTB2, and GB-5 {Area.. 2:)..,. and <br /> Area. 3 around SB-3 , ;EB-11,, and. DTB1 . <br /> Our. request for iso-:concentration maps in correspondence dated. <br /> October 4, 1995 was an attempt for all of us to visualize this <br /> separation of soil plumes we: believe to be below the site.. <br /> Although minor soil :contamination exists in GB-6 -at ;43 feet: below <br /> ground surface V :bgs) , this partial site analysis will useTotal <br /> Petroleum Hydrocarbons as Gasoline (TPHg') data from 25' bgs:. <br /> So. ;l sample. data indicates there are considerable ;changes In. the <br /> TPHg concentrations, fruit. Area- 1, 2>, and 3 . TPHg concentration of <br /> 61blO ppm was detected in GB-7.jvw-3 at 25' bgs (Area. 1) ,. <br /> Proceeding w6sterly to Area 31 TPHg concentrations in GB-9 -at 25' <br /> bgs were 45 ppm and: TPHg at. 2.61 bgs in EB--5 was less than 1. ppm. <br /> .Continuing west into Area. 3, TPHg concentrations increased. in 'SB- <br /> 3 to 1200 ppm. and to 11,0-0:t} ppm in EB-11 at 25• bgs . Post soil. <br /> vapor extraction (VW-1, Uriah} soil sampling in boring DT8l <br /> detected no. TPHg; a 25' logs <br /> A t ip isle>n isf San.Jisrlqutrt County Health Carlo:ServiLtK;. <br />