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304 E % '.mber Ave. I MR) HOOT <br /> P.0 Box 36. a-tockon,CA 95201-0388 <br /> Phone: (209) <br /> ,pproved <br />' 0 APproved with changes: See Remaft <br /> 0 C)isapproved See Remarks <br /> Remarks <br /> ------------------ <br /> 3 <br /> Date By <br /> Approval of these plans ext6 pis o ily to that <br /> welch is shown arcs de`cnbed 61ereon but <br /> .� . does not authorize or araproVe apy ctr:=ssion <br /> or deviation of requirements Of State laws or <br /> ` Local Ordinances <br /> ERI <br /> ENVIRONMENTAL RE50LL77lON5, INC -- <br /> December 9 1998 Q D <br /> ERI=909 Wog <br /> %Ir Robert Borst <br /> L notal DBCv AMG <br /> 2121 Vorth California Boulevara Suite=50 <br /> %%A=Creel. Coliforms 94596 <br /> Sub;= addendum to Work pt_n-or Suapictnental Em-tranruemal Imessgtttton at Forme-Unocal <br /> Ser,a=Station 3099 5606 Pactrie %venue Smdtma,urtom a <br /> %tr Boust <br /> -t rhe request of Unioa Oil Cotnaan- of Caliroruta(Unocal) Envmonmemai Rrsoluttons Inc (ERI) <br /> r..ornmed a Work Plan entitled 'dor& Plan car SupolemenmlEavirarvnemal lmrsrtgarton Gt Former <br /> Lnacat Service Sautan 5093 drt-d \a%emoer 12 1998 for ttw sublet,site The San Joaquin Count% <br /> Paola Health Servtce, Environmental Health Dlytston(the Caurm%y pro%td---d comments to the Work A <br /> Pisn to i letter datets d�o%cmocr=0 1998 anrequested an addIcnausi oc suammcd h% December i ai <br /> ID <br /> 99S A cop-, of the Counn s dem-r ss orm ided in Atratnmerit A Pi rsuan•to a wrtaen request by <br /> ERI the Count% granted an artesian or the suomttrul date in Dtcember 9 1995 Tnc Contin s <br /> 1poroval t,provided in Artacbm"B • <br /> The following preserve mr mrormauon retloested to are County s eotmmettr letter <br /> Item 1-;Sell Cousti-tictiou Details <br /> as requested ' Diagrams and peci icaaoas are to be included for the sells that detail the size <br /> irneih pNixtrient deodts inter%ats intt mairrtals to be included in the eatsstrue.ton o. the%veil " Well <br /> constntcnon details for 001k MC shallo%% and seep wells are provided in Attachtnem C In uddtuon is <br /> requested the street:length or deep sells%%ill be no greater man rive reel and the scractted tmcrv-al of <br /> .rc d=p monitoring well,shall be placed in the most permeable sol laver closest to tnc hsstorxat <br /> drro-st depth to grounduratcr 0 r :Loproumatcl% 60 feet below ground surface) To taciarcam the <br /> -ecogntuon or permeable zoites borings drilled for deep xell instaldauan wall be eonnnuousi%cored <br /> uenratb 40 feet <br /> [tem 2--%ual%ztc.:d Ana)%Sis or Sod Samples from Groundn:ter Momtanng Well Borines <br /> az.requcste3 in the Caunt% s letter -Sot] Samples collected tram the manttoring well tasmllattons shall <br /> be zddirionally analvzrd for the seen oxvgcnmes Its-tad tit the enclosed PHS-EHD policy' Although <br /> L noal has agreed to perrorm analvses for o9tvgenated compounds,m should be noted that Unocal has <br /> not used anv other oxv9enated compounds other than methyl tenmry butyl ether(MTBE)to its gasoitne <br /> to California Soil sampling or bortngs for lithologx and potettml laboraton analysis will be <br /> performed at 5-foot intervals From the nwrace to total depth of the deep wells for wells proposed as <br /> ,toe-bv side completion For shallo%& wells only(i e a deep melt not proposed nearb%) sot)sampling <br /> 74 bigf?al Area Surto 6 Novato Caidomm 94949 475.782-4705 {FAX 415-382 T856) r <br /> Lake forest Novato Saattrr �d <br /> t d WO�i� Wtl9E L 665 l-V l-t <br />