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<br /> Groundwater Monitoring Data
<br /> 1995 to Present
<br /> ARCO Service Station No. 548, 1612 Hammer Lane, Stockton, California
<br /> Well Elevation Staho- Top Elevation Groundwater
<br /> Samp€c of Top Water of of Flow Ethyl- Total
<br /> Numbt.r Date of Casing Level Scretn Groundwater Dlreltlon TPHG BmLene Toluene benzene Xyknes MTBE [1[ Obso-mahon%
<br /> W-4(62) 08/12/97 1157 3445 -2288 E <50 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S,No 0
<br /> W-4(64) 11/18/97 1157 3431 -2274 E <50 45 25 091 2 1 <5 No FP,No S,No 0
<br /> MW-4(63 8) 02/16/98 1157 31 17 -1960 SE <50 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S,No 0
<br /> MW-4(62) 6123198 [P] 1157 28 52 -1695 SE <50 <0 5 <0 5 <0 5 <0 5 <5 No FP,No S,No O
<br /> MW-5
<br /> MW-5(60) 02/15/95 937 4028 -3091 E 6,700 420 87 620 1,100 NA No FP,No S,O=NF
<br /> W-5(61) 05/12/95 937 3895 -2908 E 5,000 560 110 400 600 NA No FP,No 5,Yea 0
<br /> W-5(60) 08/29/95 9 37 4007 -3070 E 5,700 410 150 310 590 NA No FP,No S, Ye,0
<br /> MW-5(61) 12/04/95 937 3863 -2926 E 1,200 55 11 83 92 NA No I-P,No S, YL,0
<br /> MW-5 02/02/96 9 37 3666 -2729 E 270 76 15 11 98 NA No FP,No S,Yeti 0
<br /> MW-5(60) 05/10/96 937 34 15 -2479 E 5,700 420 180 380 610 34 No FP,No S, Ye,O
<br /> W-5(60) 08/29/96 937 35 99 -2662 E 9,600 510 90 710 970 39 No FP,No S,Ye,0
<br /> MW-5(60) 11/20/96 937 3483 -2546 E 4,500 210 93 310 510 *<50 No FP,No S,YL,0
<br /> MW-5(60) 03/19/97 937 31 12 -2175 E-SE 6,200 420 68 360 590 ***<60 No IP,No S, Ye,O
<br /> MW-5 05/27/97 937 31 19 -2182 E-SE 4,500 490 59 230 350 97 No FP,No S,Ye, 0
<br /> MW-5(60) 08/12/97 9 37 3276 -23 39 E 3,600 260 12 260 350 110 No VP,No S,Ye,0
<br /> MW-5(61) 11/18/97 937 3249 -23 12 E 1,300 180 12 18 88 *<25 No CP,No S,No O
<br /> W-5(61 5) 02/16/98 937 29 14 -1977 SE 630 110 <2 5 22 83 44 No FP,No S,YL,0
<br /> MW-5(60) 6/23198 [P] 937 2661 -1724 SE 702 504 791 33 3 366 473 No FP,No S,Ye,0
<br /> MW-6
<br /> MW-6(58) 02/15/95 8 95 4002 -3107 E <50 <0 5 <0 5 <0 5 <0 5 NA No 1'l',No S,O=N1,
<br /> MW-6(58) 05/12/95 895 3826 -2931 E <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0
<br /> MW-6(59) 08/29/95 895 3991 -3096 E *<52 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0
<br /> MW-6(58) 12/04/95 895 3838 -29 43 E *<70 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No O
<br /> MW-6 02/02/96 8 95 3638 -2743 E <50 <0 5 <0 5 <0 5 <0 5 NA No IP,No S,No O
<br /> MW-6(59) 05/10/96 895 33 88 -24 93 E <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S,No 0
<br /> MW-6(59) 08/29/96 895 3566 -2671 E <50 <0 5 <0 5 <0 5 <0 5 <3 No 1'P,No S,No 0
<br /> MW-6(59) 11/20/96 8 95 34 57 -2562 E <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S,No 0
<br /> N 1NLS1Qtif]ZV0805114008\4)80698H2 XI S � ®
<br /> Shut 1 c�
<br /> 8111198
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