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' - <br /> MW-4 '� Block wail EXPLANATION <br /> (<50/<0 5) RemedlaHon 10 <br /> R Monitoring well <br /> � I <br /> (<50%0 equipment 5Q r "�"-t0+ Vapor extraction well <br /> 1 <br /> VW-5 � Air sparge well <br /> I-- <br /> VW-2 I <br /> I <br /> ws-a Sparge monitoring well <br /> --- I <br /> I <br /> .14W-7i srATloN ; Destroyed well <br /> <200•/<2) • I I BUILDING , -- ------ V x r <br /> n e I Dispenser , Vapor a # action/air <br /> 2. <br /> Isiandsi sparge piping trench <br /> _J Underground storage tank <br /> ILj <br /> I <br /> L 1 <br /> vw-7 o Conductor casing <br /> I <br /> v -10 W-6+ _______� (<50/<0 5) Concentration of total <br /> nl (<2000/3 2) vw-t t I petroleum hydrocarbons <br /> rn ' ©MW-5 _ AS-2 AS-3 ; as gasoline (TPHG) and <br /> 'I ` _4 _ vw-3 I or ~ ' I ; benzene in groundwater, <br /> 'ws I3 I I ! I I I ; Q so-2 measured in parts per <br /> AS-i Ms-2 ( I I I I II billion (ppb); samples <br /> 50 <a 5 i lot of O� I vw <br /> vw-s -' collected on 03/24/97 <br /> vw-1 NS Not Sampled <br /> Mw-�s The sample contained <br /> Sidewalk Driveway © i components eluting in the <br /> f (<50/<0 ') gasoline range, quantified <br /> as gasoline <br /> Y <br /> N <br /> C3 <br /> O <br /> v <br /> `m <br /> a <br /> S <br /> w <br /> a� HA MMER LA NE <br /> za <br /> Z <br /> V <br /> n <br /> , E <br /> d� <br /> X <br /> n <br /> Of <br /> 3 O <br /> H L0 <br /> 0 o Mw--8 <br /> -o <br /> In <br /> m� <br /> �o <br /> o - <br /> %A <br /> oMW-10O XMW-g Seurv*. Base modified from drawing <br /> (<500,1/<5) provided by RESNA. <br /> za <br /> E DATA <br /> 5/20/97 I FIGURE 2 <br /> DwN RIhY 1 ARCO SERVICE STATION NO. 2130 <br /> & Emcon APP j 7906 N. EL DORADO STREET <br /> REV STOCKTON, CALIFORNIA <br /> PROJECT NO GROUNDWATER CONTOUR MAP <br /> a 20805-a1aoos MARCH 24, 1997 <br /> �CAS <br />