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Chevron
<br /> i a [heron
<br /> " �;w l Chevron U.SA. Products Company
<br /> 6001 Bollinger Canyon Rd, Bldg L
<br /> P 0 Sox 5004
<br /> San Raman, CA 94583-0804
<br /> Sde Assessment& Remediation Group
<br /> Phone (510)842-9500
<br /> July 31, 1995
<br /> Mr Harlin Knell
<br /> San Joaquin COUrity EnN nonnlental Hcalth Depaitment
<br /> P O Boa 200)
<br /> Stockton, CA 95201
<br /> Re Fol neer Clim ton Station # 9-8632 575 West Grant Line Road Tr-acy, CA
<br /> Attached Lliviionnierital Assessment Report (GTI, 6129195)
<br /> Dear Mi Knoll
<br /> Please find atta.l-ed a tcpult elated June 29, 1995, which was prepared by Chevron's consultant,
<br /> Groundwater iLchnolmn', lnc (GTI), to dcsclrbe the results of the initial site assessment that was
<br /> performed at them suljcLt sr(C uCi I•"ay 2 and MaV 12, 1995
<br /> During site asscssilicrlt acm,ittcs GTI dillled and sampled four soil borings Each of the soil
<br /> borings was later completed as a gioundwatei monitoring well On May 12, 1995 GTI developed
<br /> and gauged cacti %,,ell
<br /> Soil samples f 10 ill C,1LIi boring x�crc anal}yed for the piesence of TPHGas and BTEX constituents
<br /> In add itton, s,.,in pIeS I11)111 bai►ng,, MW-1 and MW-4 were analyzed for TPHDiesel Soil samples
<br /> from boi i ng M\,V-I «ere 1150 anal;/cd ic11 total orI and grease, metals, and semi-volatile organic
<br /> compound,3 (S\ OCR's) DctCLLab10 c.onLcntiations of TPI-IGas and BTEX weie measured at the six
<br /> foot depth -it c it ,, bili m1a The c'ctcc trcin5 of TPI-1Diesel repor ted at borings MW-1 and MW-4
<br /> contained ullld,rhlll il,d li�,dliocar bow, No l tntlicr clabotatron was received from the analytical
<br /> laboratory a,, t1-) th,' C1,1ct 11%Llloc.ubon coinposltion There were no dcteatons above reporting
<br /> limits of total ()r1 .incl grease ane! SVOC's I'he measured concentrations of metals at boring MW-1
<br /> are thought to be lcpiL'15Cht illVC of backs found levels
<br /> Chevron has intitr 1-lcteci its consultant, Blalnc TCC,}7 Services, Inc (Blaine Tech) to begin quarterly
<br /> groundwater g,Lll"111" and '1.inlpling All four monitoring wells will be sampled and analyzed for
<br /> TPHGas, TPHDwscl, 13"1 EX constrtrlcnt,, In addition, groundwater at well MW 1 will be
<br /> analyzed lex tilt. pii-�cncc cit tot 11' oil ind glclsc The pioposcd monitoring and sampling program
<br /> Will be 1111p1(n1:, IW diu tn� 111111-1 cluallei, 1995
<br /> If you have cin% CflfCttlom 01 L0111111( 1115, \OU 111aV contact me at(510) 842-8695
<br /> Sincerely,
<br />
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