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i MW 11 04/17/91 IMW11 Depfh Benzene TPN n] (not located to scale) 39 540 <0 001 <-102 z ' 0 25 50 PSV1 01/16/91 MW13 Benzene 7PN Depth Benzene TPNg Depth 205-21 <0 D05 <1 250255 <0 005 <0 050 Scale(feet) V4 02/18/91 25 5-26 0 13 6 5 325330 <0 005 <0 050 Depth Benzene TPN 30!-31 <5 0 1 300 20 13 11 000 355-36 99 5700 24 170 12 000 30 <2 2000 HLA Excavation MW10 04/08/88 MW13 I 35 140 300 2 40 12 2100 Sample Date Depth jBenzene TPHg Benzene 7PHg EX1 09123/86 200210 <0 05 <10 V 1 02/19/91 <0 5 <10 EX2 09123/86 200210 77 6 900 MW2 01187 EX3 09123/86 200210 <0 05 60 Depth Benzene TPHg RW4 01/18/91 I Depth 18enzene 7PHg EX4 09/23/86 200210 010 720 24 <0 005 2 8 Depth Benzene 7PHg 160 NA 60 EX5 09/23/86 200210 <0 05 <10 29 <0 005 <1 200 NA <10 EX6 09/23/86 200210 <0 05 <10 34 <1 320 P1020 <0 005 <1 EX7 09123/86 200210 <0 05 <10 39 12 780 G�1P� 25 <0 005 <1 MW 12 01/21/91 Ogp 305 <0 005 <1 Depth Benzene TPHg I MW4 07/14/87 H 35 <0 005 <1 25 <0 005 Depth Benzene 7PHgeN� 40 17 130 20 <0 005 <1 175 RW2 05/09/90 Mp.FZ 35 <0 005 <1 Depth Benzene TPH �4 ROs� MW9 02/24/88 200-215 <0005 <1 R�� Depth Benzene TPNg 25 0-25 5 0 005 185 <05 <10 30 0-30 5 <0 005 <1 M W 12 oNPa- MW 10 235 <05 <10 5G V3 01/18/91 pR�vLO�N Depth Benzene 7PHg I ——— 21 <0 005 <1 P1 01/14/91 MW9 ��'' � RW4 zs <0 005 <1 Depth Benzene TPN 305 <0 005 <1 MW6 07/15/87 . 205-21 <0005 <1 ♦� V3 1 36 <05 210 Depth Benzene TPN 255-26 <0 005 <1 i� i 41 1 7 2 500 I 17 5 <0 05 <10 305-31 <0 050 16 35 5-36 <0005 <1 PSV1 UVB-MW2 (shallow)f RW3 UVB 05/10/90 PSV2 01/16/91 I Depth BenzeneTPN9 Depth Benzene 7PHg IW1 01/15/91 - UVB 20 0-20 5 <0 005 <1 20 5-21 <0 005 <1 Depth Benzene TPN RW2 - UVB-MW1 (deep) 1 25 5-26 0 0 07 19 255-25 2 0 680 I 195-20 <0 005 <1 SW2 0 MWS ♦ 31 0-30 5 D 3$ 5 0 30 5-31 <0 5 260 24-24 5 <0 005 <1 35 5 34 3 400 36 __ 295-30 <1 530 R V1 , ()\PSV2 ♦I S 34 5-35 <0 020 55 � �oRME , 395-40 <0 005 <1 } pNK , ♦ V2 02/18/91 Depth jBenzenePH9 �1 ti Depth Benzene TPN 400-4151 3 140 P2 01/14/91 MW4 �, + ES4 25 0 029 <1 50 0-51 0 0 014 <1 I Depth Benzene TPHg P1 MW2 ,1 SW1 — , 30 15 320 300 205-21 <0 005 <1 V4, r 35 46 3 980 255-26 <0005 <1 3 + ES4 �17P�Hgi ao 23 s8o LEGEND 305-31 <0 25 210 , �, , Depth Benzene355-36 <0005 <1 IW1 ESt ES3GROUNDWATER MONITORING WELL + MW5 2 0 1 <0 001 NA RW1 05/09/90 + + • PIEZOMETER MW7 07/15/87 P2�1+ ti+ +� RMER + Depth Benzene 7PNg Depth Benzene 7PH , + +, + , t�oA , �— + MW5 07/14/87 20020 5 <0 005 <1 VAPOR EXTRACTION WELL + �� S� NG ++ Depth Benzene TPHg 250-25 5 0 006 1 3 175 <0 05 <10 m , 30 5-31 0 <0 005 <1 RECOVERY WELL I 270 <0 05 <10 N ORMER ES2 + Y __ — , M 17 5 <0 05 <10 35 0-35 5 2 4 3700_ MW7 F p�Mp PERMANENT SOIL VAPOR MONITORING WELL MW8 02/23/88 z(,� )\ �$�PNDS uS�PN + AIR SPARGING WELL Depth jBenzene JTPH9 185 <05 <10 Nim= MWg -74 �_-�"l INJECTION WELL ' Z- 285 12 3200 7, Z-< MW 1 _ SOIL SAMPLING LOCATION BOUNDARY OF SOIL CONTAINING �- SW1 ' ES1 12/18/86 ES2 12/18/86 ES3 12/18/86 MW3 01187 SATURATION AT RESIDUAL Depth Benzene TPNg � SATURATION • MW1 01187 Depth Benzene TPNg 1 Depth Benzene T1'Ng Depth Benzene TPNg Depth Benzene TPHg Depth Benzene TPHg 400-415 95 810 16 0 NA <10 2 0 <0 001 NA 2 0 <0 001 NA 2 0 <0 001 NA 54 0-as Q o s5 12 z0 0 NA <10 Concentrations 1n milligrams per kilogram (mg/kg) g � ' SOIL ANALYTICAL RESULTS AND APPROXIMATE BOUNDARY OF SOIL CONTAINING HYDROCARBONS AT RESIDUAL SATURATION FIGURE <*> ETIC FORMER EXXON RS 7-3942 4444 NORTH PERSHING AVENUE 8 ENGINEERING STOCKTON, CALIFORNIA Itj