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1 r <br /> Air <br /> Benzene' 2,490 I I• MW11 Toluene 7,280 <br /> N Ethylbenzene 1,82p (not located to scale) <br /> Groundwater Benzene 581 Benzene 340 Benzene 350 (NM) <br /> Xylenes 8,020 TPH-g 50,500 <br />' 0 25 50 GW Flow Direction Toluene 23 Toluene 398 Toluene <05 <br /> Gradient = 0 005 Ethylbenzene 49 Ethylbenzene 1,760 Ethylbenzene <05 <br /> MTBE (8021) <25 Xylenes 49 Xylenes 7,240 Xylenes <05 + <br /> Scale(feet) Benzene 262 TPH-9 2,100 TPH-9 27,500 TPH-g 541 <br />' Toluene 7 5 MTBE (8021) 32 9 MTBE (8021) 920 MTBE (8021) 8 6 <br /> Ethylbenzene 558 MTBE (8260) <0 5 MTBE (8260) <5 MTBE (8260) <0 5 (#12 35) <br /> Xylenes 25 7 <br /> W13 <br />' TPH-g 2,950 <br /> MTBE (8021) 274 Benzene 1,750 <br /> MTBE (8260) <0 5 1 Toluene 1,910 <br /> Ethylbenzene 426 <br /> Benzene 700 Xylenes 1,680 Benzene <0 5 <br />' Toluene 2,300 TPH-g 18,100 Toluene <0 5 <br /> Ethylbenzene 3,390 MTBE (8021) 62 0 —H0511 <br /> H 0511 Ethylbenzene <0 5 <br /> Xylenes 17,100 MTBE (8260) <5 Xylenes <0 5 <br />' TPH-g 102,000 1�N ; TPH-g <50 <br /> MTBE (8021) 130O P�,� MTBE (8021) <0 5 <br /> Benzene <0 5 M Benzene 74 2 <br /> MTBE (8260) <10 S <br /> Toluene <0 5 1�pa R I Toluene 264 <br />' Ethylbenzene <0 5 FP Ethylbenzene 117 <br /> Xylenes <0 5 Benzene 1 30 PL MW12 Xylenes 117 <br /> TPH-g <50 Toluene <0 5 ���ON MW10 <br /> (NM) <br /> MTBE(8021) 28 3 Ethylbenzene <0 5 PR �p1N0' (-5 01) � MTBE (021) 1,400 <br /> 6 <br />' MTBE(8260) 292 Xylenes <0 5 MTBE (8260) <0 5 <br /> MW9 TPH-g 945 RW4 Benzene 7, 80 <br /> (-1044) MTBE (8021) <0 5 (-11 64) Toluene 16,800 <br /> V3 Ethylbenzene 2,420 <br />' (-1149) Xylenes 12,200 <br /> pSV1 UVB-MW2 (shallow)(-11 21) TPH-g 110,000 <br /> �4Ev�N Benzene' <0 5 (-10 64) IUVB MTBE (8021) 50 Toluene _ <br /> Ethylbenzene <0 5 RW2 (-11 02) UVB-MW1 (deep)(-11 18) <br /> Xylenes <0 5 _ SW2 �MW6 (-8 81)" Benzene 1,360 <br /> TPH-g 402 �" '� �ti PSV2 Toluene <5 <br />' MTBE (8021) 723 V1 Ethylbenzene 330 + LEGEND <br /> MTBE (8260) 725 5�f ANK (-11 07�) Xylenes <5 Benzene 6{070 <br /> Z (0 4 � �E�D TPH-g 6,980 Toluene 14;200 GROUNDWATER MONITORING WELL <br /> r V2 MTBE (8021) 260 Ethylbenzene 2'740 • PIEZOMETER <br /> . ) TPH-g 89 <br /> P1 �+ ��(-11 02) MTBE (8260) <2 5 Xylenes 11 200 <br /> NM MW2 SW1 _ RW1 A VAPOR EXTRACTION WELL <br /> (�-10 71) <br /> ( �ti V4_�-10 90j � 11 07 ;200(-�0 78) '1 MW3 ( (-10)9 ) MTBE (8021) 1<50 RECOVERY WELL <br /> -o <br /> Benzene 100 m 1 10 53 \ (-10 89) �ti MW.,r. O PERMANENT SOIL VAPOR MONITORING WELL <br />' '3 IW1(- ) r� + Benzene 105 <br /> Toluene <0 5 + AIR SPARGING WELL <br /> Ethylbenzene 7 8 = • P2i~`y �s ti ti4 FORME� �� t Toluene 698 <br /> Z (NMS t t ti ZF*110 \ --+ Ethylbenzene 163 INJECTION WELL <br /> Xylenes <0 5 @ ti+ �_+ 5�14a1NG }tit Xylenes 229 <br />' TPH-g 859 5 (-1092) Groundwater Elevation feet <br /> MTBE (8021) 6 6 -74 y MW7�lf0RMpR �� FO ER4 MTBE 80218 3 620 8 (- ) (feet) <br /> MTBE (8260) <0 5 1(-10 45) S�typS �� 05q--0- <br /> s�ASK MTBE (8260) <0 5 (NM) Not Measured <br /> G * Not Used to Determine Gradient <br />' Benzene 255 TPH-g Total Petroleum Hydrocarbons as gasoline <br /> Toluene 160 MW8 Benzene <0 5 1, MW1 Benzene <0 5 Benzene 500 Benzene 210 <br /> �' cn 10 11 MTBE Methyl t-butyl ether <br /> Ethylbenzene 752 Uj m y (" ) Toluene <0 5 (-1Q 57} Toluene <0 5 Toluene 1 g Toluene <0 5 <br /> Xylenes 1,980 ����f Ethylbenzene <0 5 1 Ethylbenzene <0 5 Ethyibenzene 4 0 Ethylbenzene <0 5 Notes <br />' TPH-g 8,580 0 �'m Xylenes <0 5 Xylenes <0 5 Xylenes 56 Xylenes <0 5 y Wells MW3, MW5, MW8, MW9, MW13, RW1, RW4,V2-V4, <br /> MTBE (8021) 120 TPH-g <50 TPH-g <50 TPH-g 755 TPH-g <50 I UVB-MW2, and SW1 were sampled on 25 March 2003 <br /> . d MTBE (8260) 920 MTBE (802 1) <0 5 MTBE (8021) <50 MTBE (8021) <0 5 MTBE (8021) <0 5 I Analytical results in micrograms per liter(ug/L) <br />' SITE MAP SHOWING GROUNDWATER ELEVATIONS AND ANALYTICAL RESULTS FIGURE <br /> FORMER EXXON RS 7-3942 <br /> o <�� <br /> ETEIC IR4444 NORTH PERSHING AVENUE, STOCKTON, CALIFORNIA <br />' 24 AND 25 MARCH 2003 <br />