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Table# W
<br /> Groundwater Monitoring Data
<br /> 1995 to Present
<br /> ARCO Service Station No 548, 1612 Hammer Lane, Stockton, California
<br /> Well Elevation Static Top Elevation Groundwater
<br /> Sample of Top Water of of Flow Ethyl- Total
<br /> Number Date of Casing Level Screen Groundwater Direction 7 PRIG Benzene Toluene benzene Xylenes MTBE [1] Observations
<br /> MW-5 (60) 02/15/95 937 4028 4200 -3091 E 6,700 420 87 620 1,100 NA No FP,No S,O=NE
<br /> MW-5 (61) 05/12/95 937 3895 -2908 E 5,000 560 110 400 600 NA No FP,No S,Yes O
<br /> MW-5 (60) 08/29/95 937 4007 -3070 E 5,700 410 150 310 590 NA No FP,No S,Yes O
<br /> MW-5 (61) 12/04/95 937 3863 -2926 E 1,200 55 11 83 92 NA No FP,No S,Yes O
<br /> MW-5 02/02/96 937 3666 -2729 E 270 76 15 11 98 NA No FP,No S,Yes O
<br /> MW-5 (60) 05/10/96 937 34 15 -2478 E 5,700 420 180 380 610 34 No FP,No S,Yes O
<br /> MW-5 (60) 08/29/96 937 3599 -2662 E 9,600 510 90 710 970 39 No FP,No S,Yes O
<br /> MW-5 (60) 11/20/96 937 3483 -2546 E 4,500 210 93 310 510 *<50 No FP,No S,Yes O
<br /> MW-5 (60) 03/19/97 937 31 12 -2175 E-SE 6,200 420 68 360 590 ***<60 No FP,No S,Yes O
<br /> MW-5 05/27/97 937 31 19 -21 82 E-SE 4,500 490 59 230 350 97 No FP,No S,Yes O
<br /> MW-5 (60) 08/12/97 937 3276 -2339 E 3,600 260 12 260 350 110 No FP,No S,Yes O
<br /> MW-5 (61) 11/18/97 937 3249 -23 12 E 1,300 180 12 18 88 *<25 No FP,No S,No O
<br /> MW-5 (61 5) 02/16/98 937 29 14 -1977 SE 630 110 <2 5 22 83 44 No FP,No S,Yes O
<br /> MW-5 (60) 06/23/98 [P] 937 2661 -1724 SE 702 504 791 333 366 473 No FP,No S,Yes O
<br /> MW-5 (60) 09/29/98 [P] 937 2839 -1902 E 1,790 242 <5 121 135 145 No FP,No S,Yes O
<br /> MW-5 (60) 12/30/98 [P] 937 2622 -16 85 SE 275 19 <0 5 605 0 629 382 No FP,No S,Yes O
<br /> MW-5 (60) 03/31/99 [P] 937 2471 -1534 E-SE 934 842 <0 5 <0 5 0 835 157 No FP,No S,Yes O
<br /> MW-5 (60) 06/28/99 [P] 937 25 88 -1651 SE 175 224 <0 5 1 15 203 328 No FP,No S,Yes O
<br /> MW-5 (60) 09/10/99 [P] 937 2787 -1850 E 614 41 9 <0 5 109 293 936 No FP,No S,Yes O
<br /> MW-5 (60) 12/13/99 [P] 937 2692 -1755 E <50 <0 5 <0 5 <0 5 <0 5 752 No FP,No S,O=NE
<br /> MW-5 (60) 03/28/00 [P] 937 2374 -1437 SE <50 <0 5 <0 5 <0 5 <0 5 <2 5 No FP,No S,No O
<br /> MW-5 (61) 06/26/00 [P] 937 2471 -1534 E 106 1 99 <0 5 <0 5 <0 5 42[2] No FP,No S,No O
<br /> MW-5 09/28/00 [P] 937 2724 -1787 E-NE 137 <0 5 <0 5 <0 5 <0 5 474 No FP,No S,No O
<br /> MW-5 12/18/00 [P] 937 2587 -1650 E <50 <0 5 <0 5 <0 5 <0 5 <2[2] No FP,No S,No O
<br /> C IARCa105481QTRLY1200010548g40o x Is Delta
<br /> 5 of 9 1130/01
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