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Table 1
<br /> Groundwater Elevation and Analytical Data
<br /> ARCO Service Station No 2186
<br /> 3212 N California 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 DO
<br /> Number Sampled NP (feet msl) (feet bgs) (feet ms I) (pg/L) (ug1L) WL) (pg1L) (pg1L) (pg/L) (pg/L) (mg/L) Comments
<br /> MW-1 03/11/2003 P 1465 45 56 -3091 <5,000 - 360 <50 <50 <50 3,200[4] 097
<br /> 06/09/2003 P 1465 4241 -2776 <2,500 — 79 <25 <25 <25 10,000[4] 270
<br /> 09/17/2003 P 1465 5126 -3661 2,300 -- 230 <50 <50 <50 3,600[4] 296
<br /> 12/11/2003 P 1465 4540 -3075 12,000 -- 970 860 1,000 3,900 3,200[4]J —
<br /> 03/10/2004 P 1465 4571 -3106 2,600 <120 <120 <120 <120 6,400[4]J 221
<br /> 06/17/2004 P 1462 4802 -3340 16,000 — 1,100 J 420 1,000 4,000 3,100[4] 090
<br /> 09/23/2004 P 1462 5435 -3973 1,400 — 75 42 84 220 80[4] 010
<br /> 12/21/2004 P 1462 4880 -3418 3,800 220 <12 220 790 340[4] 10
<br /> 03/30/2005 P 1462 4465 -3003 6200 -- 460 15 510 1,900 880[4] 199
<br /> 06/13/2005 P 1462 4272 -2810 7,500 - 370 <50 390 1,300 3,000[4] 051
<br /> 09/08/2005 P 1462 4890 .3428 6,400 -- 390 99 290 1,200 1 450[4] 146
<br /> MW-2 9/25/1995 — 1549 5901 -4352 <50 — <0 5 <0 5 <05 2 NA — No FP,No S
<br /> 10/23/1995 -- 1549 NM NM NA — NA NA NA NA NA — Not observed
<br /> 12/22/1995 -- 1549 5476 -3927 <50 — <0 5 <05 <0 5 <0 5 NA — No FP,No S
<br /> 2/16/1996 -- 1549 51 16 -3567 <50 — <0 5 <05 <0 5 <0 5 NA — No FP,No S
<br /> 5/23/1996 - 1549 4628 -3079 <50 — <0 5 <0 5 <0 5 <0 5 NA — No FP,No S
<br /> 9/19/1996 -- 1549 5453 -3904 <50 - <0 5 <0 5 <0 5 <0 5 <30 — No FP,No S
<br /> 11/27/1996 -- 1549 51 67 -3618 <50 — <0 5 <0 5 <0 5 <0 5 <3 0 -- No FP,No S
<br /> 3/21/1997 -- 1549 4316 -2767 <50 - <0 5 <0 5 <0 5 <0 5 <3 0 — No FP,No S
<br /> 5/22/1997 - 1549 4481 -2932 <50 - <05 <05 <0 5 <0 5 <30 — No FP,No S
<br /> 8120/1997 — 1549 5071 -3522 <50 — <0 5 <05 <0 5 <0 5 <30 -- No FP,No S
<br /> 11/20/1997 - 1549 5017 -3468 <50 -- <0 5 <05 <0 5 <05 <50 -- No FP,No S
<br /> 2/17/1998 1549 45 30 -2981 <50 <05 <0 5 <0 5 <0 5 <50 -- No FP,No S
<br /> 6/24/1998 -- 1549 3669 -2120 <50 — <05 <0 5 <0 5 <0 5 <50 -- No FP,No S
<br /> 9/21/1998 -- 1549 4031 -2482 <50 - <05 <0 5 <05 <0 5 <50 -- No FP,No S
<br /> 12/14/1998 — 1549 3828 -2279 <50 _ <05 <05 <0 5 <0 5 <50 -- No FP,No S
<br /> 3/31/1999 1549 3524 -1975 <50 — <0 5 0 781 1 <0 5 <0 5 <50 — No FP,No S
<br /> 6/11/1999 — 1549 3514 -1965 <50 -- <0 5 <0 5 <0 5 0 796 <50 — No FP,No S
<br /> 9/10/1999 — 1549 3937 -2388 <50 -- <0 5 <0 5 1 <0 5 <0 5 <50 -- No FP,No S
<br /> 12/3/1999 — 1549 3933 -2384 <50 -- <0 5 <0 5 <0 5 <0 5 <2 5 -- No FP, No S
<br /> 4/3/2000 — 1549 3590 -2041 <50 <0 5 <0 5 <0 5 <0 5 <2 5 — No FP, No S
<br /> 6/22/2000 — 1549 3608 -2059 <50 -- <20 <2 0 <20 216 <2 0[4] -- No FP,No S
<br /> 9127!2000 -- 1549 4138 -2589 <50 -- <0 5 <05 <0 5 <0 5 <2 0[4] — No FP,No S
<br /> Report Date October 97, 2005 Page 2 of 13
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