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I <br /> Benzene 2,460 <br />' Toluene 9,300 MW'11 <br /> • N GW Ethylbenzene 2,150 not located to scale)Groundwater Xylenes g,370 Benzene 117 Benzene 9S 6 Benzene 8 80 � {NM) <br />' <br /> Flow Direction Toluene 50 Toluene 460 Toluene 22 0 25 50 TPH-g 57,400 <br /> Gradient = 0 005 MTBE (8260} <p 5 Ethylbenzene 48 Ethylbenzene 2,670 Ethylbenzene 05 ' <br /> Ethanol c1 pp Xylenes 106 Xylenes 10,300 Xylenes 41 <br /> Scale(feet) TPH-g 2,550 TPH-g 40,400 TPH-g 1,040 <br />' Benzene 190 MTBE (8021) 240 MTBE (8021) 139 MTBE (8021) 98 <br /> Toluene 6 8 MTBE (8260) <0 5 MTBE (8260) <0 5 MTBE (8260) <0 5 13 g1 <br /> Ethylbenzene 421 (M W 13 <br /> Xylenes 212 1 <br />' TPH-g 1,840 <br /> MTBE (8021) 271 Benzene 1,830 <br /> MTBE(8260) <0 5 Toluene 1,960 Benzene 636 <br /> Ethylbenzene 549 Toluene 189 <br />' Xylenes 1,720 Iew Ethylbenzene 804 <br /> Benzene <0 5 <br /> Benzene 279 TPH-g18,400 G�Pp\'CPQ- Xylenes 858 Toluene 0 9 <br /> Toluene 17,300 MTBE (6260) <0 5 �'`p� TPH-g 1,180 Ethylbenzene <0 5 <br /> Ethylbenzene 3,910 Ethanol <100 �.1,� MTBE (8021) 82 Xylenesc<0 5 <br /> Xylenes 16,600 MPRk� MTBE (8260) <0 5 MTBE (8260) <0 5 <br /> TPH-g 106,D00 OSE ; <br /> MTBE(8021) <0 5 �1&L Ethanol <100l <br /> I Benzene <05 NPS MMW12 <br /> Toluene <05 p EG 308 (NM) <br />' Ethylbenzene <05 <br /> 9 Xylenes <05 <br /> MW <50 RW4 Benzene 10,3(0 <br /> (-1162)9 MTBE (8260) <0 5 (-1304) Toluene 17,4(0 <br /> Ethanol <100 V3 Ethylbenzene 3,60 <br /> I • (-12 84) Xylenes 17,1(0 <br /> PSV1 <br /> UVB-MW2 (shallow) (-12 54) MTBE TPH-g 121,00 5 <br /> Benzene 120 <br /> (-1207) -- UVB <br /> Toluene <0 5 RW2 (-12 39) UVB-MW1 (deep) (-12 52) r <br /> Ethylbenzene <0 5 ��-� � 5W2 14rMW6 (Ory) <br /> Xylenes <0 5 _ Toluene Benzene 1 114 0 <br /> TPH-g 380 -� MSR V1 i * C3 PSV2 Ethylbenzene 370 LEGEND <br /> MTBE (8260) 992 P R NK (-122 Xylenes 220 <br /> MW4 , <br /> Ethanol <100 4,68Benzene 7,200 GROUNDWATER MONITORING WELL <br /> � ` � <br /> Q 11 84) �� �� V2 MTBE (8260) 0 5 Toluene 16,000 • PIEZOMETER <br /> •P1 �� (-12 25) Ethanol <1 DO Ethylbenzene 3,460 <br /> (NM) MW2 N SIl �` RVIf1 Xylenes 12,400 A VAPOR EXTRACTION WELL <br /> (-11 88) \,V 95 (-1205) (-12 22)\ TPH-g 95,800 RECOVERY WELL <br /> (-11 95) �� MW3 t (-12 C36) <br /> Benzene 143 � 1W1(-11 72) i, (-12 10) �� MW Benzene 102 MTBE (8021) I 0 8 PERMANENT SOIL VAPOR MONITORING WELL <br /> Toluene <0 5 ', _ 3 % E MTBE (8260) <0 5 <br /> Toluene 85 7 +- AIR SPARGING WELL <br /> Ethylbenzene 64 ! p R S <br /> •(PZ!} o� � � t, � RtJ+�N � Ethylbenzene 264 ' <br /> Xylenes 1 6 NM i i �zA O G -�t Xylenes 335 I � INJECTION WELL <br /> TPH-g 1,270 tit i` �� �U11 p1N } - R MTBE TPH-g 3,520 36 7 + <br /> y � oeRI (-1092) Groundwater Elevation(feet) <br /> MTBE (8260) <0 5 G \t7N\' ©¢ 'I fo <br /> Ethanol <100 (-11 59) PD Mpg ;.- p- MTBE (8260) <05 + (NM) Not Measured <br /> G �g �PNK I TPH-g Total Petroleum Hydrocarbons as gasoline <br /> Benzene 242 <br /> I Toluene 85 3 MW8 ,�-�` Benzene 830 Benzene <0 5 I MTBE. Methyl t-butyl ether <br /> MW1 -�" Toluene 42 Toluene 1 5 <br /> Ethylbenzene 754 �� �y� (-11 28) (-11 53) Ethylbenzene 100 Ethylbenzene <0 5 <br /> Xylenes 1,200 �- f --�- Xylenes 97 Xylenes 0 9 <br />' TPH-g 6,900 TPH-g 1,280 TPH-g <50 Notes <br /> a MTBE(8260) 440 MTBE (8021) 125 MTBE (8021) <0 5 Analytical results in micrograms per liter(ug/L) <br /> 0 Ethanol <100 MTBE (8260) c0 5 I Wells gauged on 28 June 2004 <br /> SITE PLAN SHOWING GROUNDWATER ELEVATIONS AND ANALYTICAL RESULTS FIGURE <br /> <,*>ETIC FORMER EXXON RS 7-3942 j <br /> ENGINEERING 4444 NORTH PERSHING AVENUE, STOCKTON, CALIFORNIA 1 <br /> 28-29 JUNE 2004 <br /> 3 <br />