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I <br /> I Ei1�il1 � <br /> �iaNMENT HEALTH Di M10fy <br /> 344 E.Weber Ave Third Floor <br /> P.O Bax 388,Stockton CA 95201-M <br /> i Approved <br /> f a� 714!532-852L . •.,,tilt,illwRti V-� tM�e <br /> YY <br /> LEWRONMEA �AUDI, INC. Denied <br /> 2900-A 0;TECA WAY • PLACE, CLid1Zorys <br /> Ddo <br /> Scptczr t 16 19% <br /> Prgect No 1232 <br /> maebael Unfarm <br /> San Stragrrrn Cvtmry Pethlic Htaltlt Serv„ts <br /> &tvtr0otnen1al health div=on <br /> P O Bot 2009 <br /> 1601 Fast Hazelton.vent <br /> SToclaon,CA 95201-6229 <br /> RE- ADDE3NDUial TO SOUL VAPOR EXTRACTION PELOT 511MMY WORK FLAN <br /> MoniWairry Ward Auto Senr,re Ctee:r <br /> 5400 Pacific Avenue,Staddon,CA <br /> CSrte Code 2163? <br /> Dear Mr Infirm <br /> Tris letter will serve as an Addendtun to the Soil Vapor Exft=tbn Pilot Study Work Pian <br /> I (dated August 2 1996)prepared by Envitomemal Atltltt,Ine (F-Al)(or the abovNrdiem� <br /> site This Ad6etrdum was prepared to address Sou Joaquin County Ptitilm Health Scavtces <br /> (Caunq Health)t.,,,.,.mrds regardmg dmVurk Plan as oudmx:d m Coaru; licalth's tcucr dated <br /> Angusz 9.1996 <br /> Vertical Ebae=1 of So€I Contmutraat tin <br /> As rcqur=d,the boning for vapor Oxtr=10e;well VEW-1B WM be ext ndW to a depth of 65 <br /> feet below ground surface(bgs)(see Work pian,Figure 10) Adrhaonal soil samples wr0 be <br /> cAlected at depth of 50 55 60=rid 55 ferx bgs Note that most of these soil Samples will be <br /> collected from intervals below the eurrem depth to ground water(saturated zone)beneath the <br /> site These sort samples will be tested for teal petnolenmr hydrocabons as g.*",ne(TPH-G) <br /> by maddied EPA(Method 8015,and beeveae tohtem ethylberrxem and xyletres(13'18X)and <br /> (t <br /> mtethyl te- ory tnrtyl ober(MTBE)by EPA Method 8020 OF MTBE u detected m any of the <br /> sal samples by EPA Method 5020 it will fie quamiFted in selected simples by EPA Plethod <br /> (1260 <br /> To address County Heakb concerns regarding the venwaf extent of coif a,mnamm between the <br /> lwo)alum, t C former underground storage tanks(USTs) location and fmrnrer fuel islands <br /> Soc»uvu, sod vapor probe SP-7B wal be drilled to 65 fact bgs(toe Work Plan, 1-rg,tue 10) <br /> Additional soil sarttples will be collcmed u five-font intervals from depths of 35 to 65 fee bgs <br /> Note that soil mrnplcs collected from dcptho grraer than 50 feet figs aril be collected firom <br /> within the sa[r,tmud wire 'Mese samples will be tested fur TPH-G B= and MCBG ns <br /> dcwrtbed above <br />' � 4 <br /> t <br /> Pl_,►NNM EIWIItl"ENTAL ANALYSIS ANI( <br /> HAZARDUM SUBMK s xmAcemeW Arm RttAEO A7'7pn1 <br /> 1 <br /> i <br />