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' Benzene <0 5 Benzene 320 Benzene 515 Benzene 112 Benzene 26 0 Benzene 310 <br /> • Toluene <0 5 Toluene <05 Toluene 290 Benzene 892 Toluene 350 Toluene 484 Toluene <0 5 <br /> Ethylbenzene <0 5 Ethylbenzene <05 Ethylbenzene 176 Toluene 30 600 Ethylbenzene 11 0 Ethylbenzene 1 390 Ethylbenzene <0 5 <br /> Xylenes <0 5 Xylenes <p 5 Xylenes 182 Ethylbenzene 4 850 Xylenes 41 0 Xylenes 5,280 Xylenes <0 5 <br />' TPH-g 101 TPH-9 316 TPH-9 4 560 Xylenes 24 100 TPH-g 1 760 TPH-g 13 900 TPH-9 369 <br /> MTBE(8021) 102 MTBE(8021) 760 MTBE(8021) 132 TPH-g 62 400 MTBE(8021) 550 MTBE(8021) 102 MTBE(802 1) 140 <br /> MTBE(8260) 150 MTBE(8260) 112 MTBE(8260) <0 5 MTBE(8021) <10 MTBE(8260) <0 5 MTBE(8260) <10 MTBE(8260) 105 <br />' Benzene 9 090 <br /> Toluene 29 600 <br /> Ethylbenzene 3100 CHATEAU MW11 <br /> Xylenes 19700 HOSPITAL Benzene <05 <br /> TPH-g 96 700 (not locate to scale) Toluene <p 5 <br />' MTBE(8021) <25 (-15 03)' Ethylbenzene <0 5 <br /> Xylenes c0 5 <br /> Z TPH-g <50 <br /> � <br /> MW9 PROFESSIONAL REALTOR MTBE(8021) 080 <br /> w (_948) BUILDING MW13 MTBE(8260) 1p2 <br />' w (not located to sale) <br /> �- <br /> Benzene 1 70 (-11 1 32)' Benzene cp 5 <br /> Toluene <p 5 Toluene 220 <br />' Ethylbenzene <0 5 Ethylbenzene 11 5 <br /> Xylenes <05 MW 10 f Xylenes 300 <br /> MTBE(8021) 1p1 90 ROSEMARIE LANE (-10 65)' MTBE(8021) 801 <br /> 05 . <br /> MTBE(8260) <05 <br />' Benzene 10 810 26 I1 <br /> Toluene 070 PSV1 UVBM <br /> - W2 V3 RW4 MW12 I <br /> Ethylbenzene 126 MW4 (-989) U\VI B (shallow) (-1059) (-1079) (NM) III <br />' <br /> Xylenes 895 30 (-973) + UVB-MW1 (deep)(-10 25) <br /> TPH-g s <br /> MTBE(8021) 121 P1 V1 SW2 MW6(-10 06) Benzene 198 <br /> MW2 (-1007) NM Benzene 770 <br /> Toluene 740 <br /> MTBE(8260) -50 (NM) _—___-- ( ) Toluene <br /> (-9 40)' j SW 1 I ©I PSV2 Ethylbenzene 316 <br />' • I V4 (NM Ethylbenzene I ; Ethylbenzene <0 5 Xylenes 304 <br /> Benzene <0 5 IW1 (-8 78)' I V2 Xylenes <p 5 TPH-g2 350 <br /> Groundwater <br /> Toluene <0 5 (-966) I FO MER '(-10 09) TPH-g <50 MTBE(8021) 200 <br /> Ethylbenzene <0 5 • P2 ANK I MW3 RW 1 MTBE(8021) <0 5 MTBE(8260) <0 5 <br /> W Flaw Direction <br /> Xylenes <0 5 (NM} 1 IELD (-9 99)(_i0 12� Grodjent = 0 004 <br />' MTBE 8021) <<0 5 50 U p LU _J j I Benzene 5 590 <br /> ( ) _>¢ 10j, <br /> MW7 I I I I I Toluene 22 804 <br /> w m n LU (-9 55 I I I I I I i Ethylbenzene 2 810 <br /> Benzene 060 (-928) )I I F RMER I MWS Xylenes 10,200 <br />' Toluene 500 MVU8 FORMER✓ I S TI x(_10 02) TPH-g 67 600 LEGEND <br /> Ethylbenzene 233 C7 MW1 PUMP I B ILDING I , MTBE(8021) <25 <br /> Xylenes 577 ? 1 I GROUNDWATER MONITORING WELL <br /> TPH-g 215 T (-962) ISLANDS <br /> Cf) I I I__ ; Benzene 148 • PIEZOMETER <br /> MTBE(8021) <05 I_ ____u VAPOR EXTRACTION WELL <br /> LU Toluene 82 p <br />' tl Ethylbenzene 214 <br /> 2 <br /> ' FORMER Xylenes 298 RECOVERY WELL <br /> USED TPH-g 3360 PERMANENT SOIL VAPOR MONITORING WELL <br /> 0 OIL TANK MTBE(8021) 970 + AIR SPARGING WELL <br />' Z MTBE(8260) <05 <br /> INJECTION WELL <br /> Benzene <0 5 (-966) Groundwater Elevation(feet) <br /> Toluene <0 5 <br /> Ethylbenzene <0 5 ' Not Used to Determine Gradient <br />' Benzene <0 5 Benzene 4 480 Benzene 260 Xylenes <05 (NM) Not Measured <br /> N Toluene <0 5 Toluene 17,200 Toluene 100 TPH-g <50 <br /> Ethylbenzene <0 5 Ethylbenzene 2 800 Ethylbenzene 0 50 MTBE(8021) <p 5 TPH-g Total Petroleum Hydrocarbons as Gasoline <br /> Xylenes <0 5 Xylenes 14 100 Xylenes 160 MTBE Methyl t-Butyl Ether <br />' TPH-g <50 TPH-g 60 600 TPH-9 290 Notes <br /> 0 30 60 MTBE(8021) <05 MTBE(8021) <25 MTBE(8021) 760 1 Analytical results in micrograms per liter(ug/L) <br /> MTBE(8260) <0 5 j 2 Wells MW10, MW11 and MW13 were gauged and <br /> sampled on 6 March 2002 <br /> N Scale{feet} 3 Wells MW8 MW9 RW4 and V3 were sampled on 6 <br />' March 2002 <br /> ig SITE MAP SHOWING GROUNDWATER ELEVATIONS AND ANALYTICAL RESULTS FIGURE <br />' E"C <br /> FORMER EXXON RS 7-3942 <br /> Engineering Inc 4444 NORTH PERSHING AVENUE, STOCKTON, CALIFORNIA 1 <br /> 5 MARCH 2002 <br /> ii <br />