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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No 2130 <br /> 7906 N EL Dorado Street, Stockton, CA <br /> TOC Depth to Water Level Ethyl- Total <br /> Well Date P/ Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DQ <br /> Number Sampled NP (feet ms]) (feet bgs) (feet msl) (pg/L) (pg/L) (pg/L) (pg/L) (pgll-) (pglL) (pglL) (mg/L) Comments <br /> VW-8 5/20/1997 -- -- 4481 -- 25 000 -- 480 290 260 3,900 <120" — No FP,No S <br /> 9/1/1998 -- — 4023 — NA — NA NA NA NA NA — <br /> 12/2/1998 -- -- 3869 — NA — NA NA NA NA NA — <br /> 3/31/1999 -- -- 3750 -- NA -- NA NA NA NA NA — <br /> 6/4/1999 -- -- 3656 -- NA -- NA NA NA NA NA — <br /> 9/2/1999 -- -- 4099 -- NA -- NA NA NA NA NA — <br /> 11/29/1999 — — 3914 — NA — NA NA NA NA NA — <br /> 3/16/2000 — 3524 — NA — NA NA NA NA NA -- <br /> 6/26/2000 -- - 3780 — NA -- NA NA NA NA NA -- <br /> 9/28/2000 -- -- 4203 -- NA -- NA NA NA NA NA - <br /> 12/19/2002 -- -- 4157 -- 290 -- 46 14 12 31 <10 — <br /> 03/06/2003 P -- 3927 — 930 — 150 J 16 68 14 1 0[2] 12 <br /> 06/11/2003 P -- 3817 — 530 — 81 19 J 23 1 3 <2 5[2] 297 <br /> 09/24/2003 P -- 4221 -- 1,900 -- 140 <50 200 270 <5 0[2] -- <br /> 1 211 01200 3 P — 41 60 — 81 — 11 <050 <0 50 <0 50 4 9[2] -- <br /> 03/08/2004 P -- 3936 -- 1 500 - 120 <25 64 <25 <2 5[2] 106 <br /> 06!2412004 NP -- 4411 -- 130 -- 2 6 <25 <2 5 <25 2 8[21 217 Water levels taken on <br /> 6123/04 <br /> VW-9 03/06/2003 <br /> 12/10/2003 — — — - — — — -- -- -- -- -- Well Dry <br /> 03/08/2004 -- -- -- - -- - — — — — -- Well Dry <br /> 0612312004 NP — — -- -- -- -- -- -- -- -- Well Dry,Not Sampled <br /> VW-10 12/19/2002 -- -- 41 59 - 14,000 -- 2,800 890 890 3,600 <10 0[2] — <br /> 03/06/2003 P — 3913 -- 20,000 -- 2 600 260 1,300 4,900 <50[2) 23 <br /> 06/11/2003 P — 3866 — 14,000 — 1,600 39 1,100 3,300 <25[2] 392 <br /> 09/24/2003 P 4270 -- 2,800 — 180 74 270 480 <5 0[2] — <br /> 12/10/2003 P — 4161 — 20,000 — 3,200 J 720 J 2,100 J 6,800 J <5 0[2] -- <br /> 03/08/2004 P — 3919 — 1 500 -- 110 <25 62 <2 5 <2 5[2] 276 <br /> 06/24/2004 NP 4402 -- 150 -- <25 <2 5 <25 <2 5 2 812] -- Water levels taken on <br /> 6123104 <br /> VW-11 12/19/2002 — — 4128 1 — 55 1 — 51 <0 50 064 <0 50 0 98[2] 1 — <br /> 03/06/2003 P j 1 3904 1 -- 110 1 -- 12 <0 50 051 18 <0 50[2] 18 <br /> Report Date August 4,2004 Page 18 of 20 <br />