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i I Page 4 of 7 Table 1 Groundwater Elevation and Analytical Data I ARCO Service Station#4932 16 E Harding Way,Stockton,CA WellL-r7 - Depth Cioundwater - LPH -," Groundwater Ethyl- Xylenes MtBE Mt9E ` W fl� r Daft r 66 6- "to Water '�Elevibon Thickness Elevation TPHg Benzene Toluene benzene (total)" 8020 . (802018260) DO SL) Ppb)iiNumbgtF ft - (m9/L) MW-9 07/20/01 P 1124 2649 -1525 000 -- 200 12 0 56 <0 50 1 7 2 8 <2 0 — 10/22/01 P 28 36 -1712 000 -187 690 •• 3 3 0 93 14 12 <2 5 <2 0 I 12 01/15/02 P 27 89 -1665 000 047 540 — <50 <5 0 <5 0 <5 0 <25 <0 50 I 2 6 04/11/02 P 2703 -15 79 000 0 86 170 '• 1 2 <0 50 <0 50 <0 50 3 5 <1 0 3 6 07/12/02 P 27 94 -16 70 0 00 -091 130 — <0 50 16 <0 50 0 87 <2 5 <0 50 ( 31 11/20/02 P 3052 -1928 000 -2 58 120 •• 0 75 066 <0 50 <0 50 <2 5 <0 50 I 030 01/30/03 P 2974 -1850 000 078 100 15 067 <0 50 <0 50 <2 5 <0 50 042 04128!03 P 2906 -1782 000 0 68 95 <0 50 <0 60 <0 50 <0 50 — <0 50 165 07/29/D3" P 3024 -1900 0 06 -1 18 130 s 0 83 <0 50 <0 50 <0 50 — <0 50 I — 10108-09103 P 3184 -2060 0 OD -160 <50 <0 50 078 <0 50 077 — <0 50 1068 01112!04 P 3158 -2034 000 0 26 <50 <0 50 <0 50 <0 50 <0 50 — <0 50 2 10 04/26/04 P 3003 -1879 000 155 <50 <0 50 <0 5o <0 60 <0 50 — <0 50 — MW-10 07/12/02 P 1132 2885 -1753 000 — <50 <0 50 14 <0 50 0 52 <2 5 <0 50 2 8 11/20/02 P 3141 -2009 000 -2 56 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 092-103 01130/03 P 3069 -1927 000 0 82 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 192 04!28103 P 29 83 -1851 000 076 <50 <0 50 <0 50 <0 50 <0 50 — <0 50 1 162 07/29W P 3142 -2010 000 -159 <50 a <0 50 <0 50 <0 50 <0 50 — <0 50 10108-09103 P 3296 -2164 000 -154 <50 <0 50 14 <0 50 1 1 — <0 50 143 01/12/04 P 32 33 -2101 000 0 63 <50 <0 50 050 <0 50 0 51 — <0 50 1 200 04/26/04 P 3081 -1949 000 152 <50 <0 50 <0 50 <0 50 <0 50 -- <0 60 — MW-11 07/12102 P 1105 29 03 -1798 000 — <50 <0 50 14 <0 50 0 81 <2 5 <0 50 3 0 11/20142 P 3173 -2068 000 -270 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 0 53 01/30/03 P 3090 -1985 000 083 <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 ; 173 04/28/03 P 3014 -1909 000 076 <50 <0 50 <0 50 <0 50 <0 50 — <0 50 1 32 07129103' P 3168 -2063 000 -154 <50 a <0 50 <0 50 <0 50 <0 50 — <0 50 I — 10/OS-09/03 P 3330 -2225 000 -162 <50 ' <0 50 078 <0 50 0 87 — <0 50 071 01/12104 P 32 64 -2159 000 0 66 <50 <0 50 <0 50 <0 50 <0 50 — <0 50 I 070 04126/04 P 3112 -2007 0 00 162 <50 <0 5o <0 50 <0 50 <0 50 -- <0 50 I — i SVE-1 09/05/00 P 1184 2645 -1447 000 — 66,600 1,770 8 000 2 550 12,900 1 140` -- I — 11/02/00 P 2711 -1513 000 -0 66 4 750 152 469 164 823 212 21211 200 2 8 03/05/01 P 2640 -14 56 0 00 057 72 300 2090 10 100 2 710 14 800 12 100 12 10013 720 I 51 05/08/01 P 26 04 -1420 0 00 036 45 300 1 560 5 170 1 850 9 490 6 900 6 900/4 930 I 031 07120101 P 2749 -1564 ' 0 01 -144 Not sampled 0 01 R LPH present 10!22/01 P 2893 -1708 0 01 -144 Not sampled 0 01 It LPH present 01/15/02 -- — — — Not sampled well dry i 04/11/02 NP 2788 -1604 000 104 87 000 5200 16 000 3 900 20 000 20 000 19 000 3 0 07/12/02 NP 28 98 -1714 000 -1 10 85 000 4,100 8 900 3 700 18,000 13,000 15 DOD i 2 2 11/20/02 — -- — — Not sampled well dry I 01/30/03 — — — — Well unable to be sampled connected to remedial system I 04/28/03 _ — — — — Well unable to be sampled connected to remedial system I Project/ARCO/4932/ReportafTables/2004 gwtables4932 xis I i I