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California lkegional Water Quality Control Board
<br /> Central Valley Region
<br /> Rohnri Sebneider.Chair Arun[d Shc\ral7enej;9,er
<br /> Terry Tammi nen dnva,CA 95670-fi 114 Cmmmnr
<br /> tecrelmyftr 1i020Sun Cc91(1)Dive tl?.00Rax(90,)r RECEIVED
<br /> 9]C 464-9291-Fax(9lfi}4G4-4704
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<br /> p+•nfnnlinn http;7lwvnvswrcb,dt.gnv.f rW q
<br /> 6 May 2004
<br /> Mr.Cecil Dillon Mr.Richard Bokides Mr.NaAci Dhingsa
<br /> Flag City Ltd.Partnership Bekides;`amily Ltd.Parttlership First investment flag City,Ina.
<br /> 13201 W. Kcttlamau lane, Suile T3 6421 Capitol Avenuc 517 Coronmvood bane
<br /> Lodi,CA 95242 Lodi,CA 95242 Cannirharl,CA 95609
<br /> RT.I!LTJI;FLACrCITYCF1IivRON, 6421l-APITOL P7,7 UE,LO&1,,SANdOAQUlNCOUWY, CLEANUPAND
<br /> AAATF,MFNT ORDER(CAA)NO. 5-00-700
<br /> I reviewed the Mork Plan Addendum-April 2004(Workplan),received 20 April March 2004,submitted an Chevron's
<br /> behalf by Advanced Geol ulvironmenlal,Tnc. The MorPI)Iau proposes installing one dual-completion(nested wells)
<br /> monitoring well ill the street:south of New West Petroleum,6437 Ranger Avunne in the first wafer zone(.mreened
<br /> from 10 to 25 feet)and scoond water zuric(screened from 45 to 50 fleet) aquifers. The purpose of this nost'A well
<br /> (MW-191 is In extend ilio monitoring well netwmvk upgradient(north)of 1:he site;to verify Cone Penetromct'er Testing
<br /> (CP f) analytical data,which indirntcs that rr:ethvi tort-butyl spier defected in monitoring wall MW-3A may be
<br /> coming froman upgradimt,offsite soiree. The itnrltpWn includes a genlogieal Cross scGtion(figure 3) of first and
<br /> second aquifer z¢nus. The Torlq;lrm nmposes taking 2-foot cores for evmy 5 feet of boring;dcltth_
<br /> I Concur to the $r075{."71an wiLk the followingmodificstions:
<br /> Conlittuonsly care the boring for iitholoEy. C'onrinuous coring will help identify thin pc7mmblc and
<br /> mpemtoable sed romttary hods,be,uscfitl for updating cross sections in the SiLa Concrpival Madel,and may
<br /> result in optinunn placement of well screens if lithology changes laterally.
<br /> o Continuously sound depths with a weighted mcasaring Gape during well entlsnvetion,to assure proper
<br /> placcnimr.of filter pack and bmitonif:c pellerswithout bridging.
<br /> Use spucct s (cantrAUCU'S)to ensure a minimum 2"of filter pack,seal,or grout:around each well casino in
<br /> the single boring.
<br /> Please also do the foilowing: when CVT analytical data undlor CPT cross-sections are providod,includr,a cupy of the
<br /> CPT hgring Inns in future submittals;provide a report of pie monitoring well installal km in the next monitoring
<br /> report; apply for required pcatttil(s) froth San Joaquin County E,nvironlncnral TJealrh Depanmont;and provide at leas:
<br /> 72 hours prior notice,so that I may be present for the fieldwork. You may contact meat(916)464-0615 with nny
<br /> questions or
<br /> Gommcnts.
<br /> James I_13ari an; R C..,
<br /> Engineering Geologist
<br /> cc: Mr.Marls Owens,UST Cleanup Fund, SWRCB, Sacramento
<br /> Mr, Mike.lnfurna,San,loaquin County Environmental Hcaltli.Division,Stockton
<br /> Mr,Scott Rishwain,Rishwain&Rishwain, Stockton
<br /> ;Lir,Ben Guzman, San Toaquin County Municipal Utilities, Stockton
<br /> Mr, Timothy3, Cuellar,Advauued Geo nvironmental, Incorporated, Stockton
<br /> Cal.fornira Euyiroi;n1ental Protection Agelicy
<br /> ��[teryrkR Prrper
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