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<br /> Groundwater Elevation and Analytical Data
<br /> ARCO Service Station No 2186
<br /> 3212 North Calsfomia Street,Stockton,Calrfornra
<br /> TOC Static Water[1] Screen Groundwater Ethyl- Total
<br /> Well Sample Elevation Level Interval Elevation Groundwater TPHg Benzene Toluene benzene Xylenes NItBE[3]
<br /> Sample No Date ft msl ft b s ft b s ft msl Flow Direction IL L L L Observations
<br /> MW 4 11/20/1997 1383 4836 45-65 3453 E 89 10 11 063 20 11 No FP,No S
<br /> 2/17/1998 4355 -2972 E SE 180 057 <0 5 <0 5 059 29 No FP,No S
<br /> 6/24/1998 3506 -21 23 E <50 <0 5 <0 5 <05 <0 5 162 No FP,No S
<br /> 9/21/1998 3867 2484 E NE 131 <0 5 <0 5 115 167 262 No FP,No S
<br /> 12/14/1998 3661 2278 E NE 136 108 <0 5 <0 5 <0 5 291 No FP,No S
<br /> 3/31/1999 3385 2002 N NE <50 <0 5 <0 5 <0 5 <0 5 796 No FP,No S
<br /> 6/11/1999 3347 1964 E NE 194 <0 5 <0 5 <0 5 <0 5 41 No FP, No S
<br /> 9/10/1999 3772 2389 E NE 213 148 <0 5 <0 5 <0 5 1,100 No FP,No S
<br /> 12/3/1999 3764 -2381 E 641 <0 5 <0 5 <0 5 <0 5 731 No FP,No S
<br /> 4/3/2000 3430 -2047 NE <50 <0 5 <05 <0 5 <0 5 166 No FP,No S
<br /> 6/22/2000 3437 2054 E 232 <2 0 <2 0 <2 0 <2 0 2,070[4] No FP,No S
<br /> 9/27/2000 3980 2597 E NE 185 160 <0 5 0 542 1 17 6,590[4] No FP,No S
<br /> 10/19/2000 3959 2576 E NE NA NA NA NA NA NA Not observed
<br /> 12/20/2000 3768 2385 E NE <50 <0 5 <05 <0 5 <0 5 1,170 No FP,No S
<br /> 3/16/2001 3650 -2267 E-NE <50 <0 5 <0 5 <0 5 <0 5 481[4] No FP,No S
<br /> 6/21/2001 3937 -2554 NE <50 <0 5 <0 5 <0 5 <0 5 590[4] No FP, No S
<br /> 9/13/2001 4512 3129 E NE 150 <0 5 <0 5 <0 5 <0 5 7,600[4] No FP,No S
<br /> 12/11/2001 4243 2860 NE 84[7] <0 50 <0 50 <0 50 <0 50 5,600[4] No FP,No S
<br /> 3/14/2002 3926 2543 E NE 88[7] <0 50 <0 50 <0 50 <0 50 4,900[4] No FP,No S
<br /> 6/19/2002 41 46 -2763 E-NE 540[7] <0 50 <0 50 <0 50 <0 50 2 900[4] No FP,No S
<br /> 9/12/2002 4862 -3479 E-NE <50,000 <500 <500 <500 <500 16,000 No FP,No S
<br /> 12/3/2002 4554 3171 E NE <50,000 <500 <500 <500 <500 6,600 No FP,No S
<br /> 3/11/2003 4578 31 95 NE <25,000 <250 <250 <250 <250 4,200 No FP,No S
<br /> 6!912003 4277 2894 E NE <500 <5 0 <50 <50 <50 3,200 No FP,No S
<br /> 9/16/2003 5064 -3681 NE 2,700 R <250 <250 <250 <250 6,500 No FP,No S
<br /> 17211/2003 4563 - -3180 NE-SW 3,000 R <50 <50 <50 <50 6,500 J No FP,No S
<br /> MW 5 9113!2001 1276 4513 3237 E NE <50 <0 5 <0 5 <0 5 <0 5 <2 0[4] No FP No S
<br /> 12/11/2001 4180 2904 NE <50 <0 50 <0 50 <0 50 <0 50 <2 0[4] No FP,No S
<br /> 3/14/2002 3870 2594 E NE <50 <0 50 <0 50 <0 50 <0 50 <0 50[4] No FP No S
<br /> 6119/2002 4157 2881 E NE <50 <0 SO <0 50 <0 50 <0 50 <0 50[4] No FP,No S
<br /> 9/12/2002 4874 3598 E-NE <50 <0 5 <05 <0 5 <0 5 <0 5 No FP,No S
<br /> 12/3/2002 4505 -3229 E-NE 81 <0 5 <0 5 <0 5 18 <0 5 No FP,No S
<br /> 3/11/2003 4498 -3222 NE <50 <0 5 <0 5 <0 5 <0 5 <0 5 No FP,No S
<br /> 6/9/2003 4201 -2925 E NE <50 <0 5 <0 5 <0 5 <0 5 <0 5 No FP,No S
<br /> 9/17/2003 5068 -3792 NE <50 <0 5 <0 5 <0 5 <0 5 <0 5 No FP,No S
<br /> 12/11/2003 4489 — -3213 NE-SW <50 <0 5 <05 <0 5 <05 <4 5 No FP,No S
<br /> K%WprocessV5 SP ARCQ502i8 Ouanerly\4 QTR OM186 GWMR 4003 Page 4 of 8
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