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<br /> Table 1 Page 1 of 1 ,
<br /> Groundwater(Elevation and Analytical Data
<br /> ARCO Service Station#4932
<br /> 16 East Harding Way,Stockton,CA
<br /> Well Depth Groundwater Changa in Ethyl- Xylenes
<br /> Well Date Elevation to Water Elevation Groundwater TPHg Benzene Toluene benzene (total) MtBE DO
<br /> Number Sampled (feet,MSL) (feet,TOC) (feet,MSL) Elevation(feet) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/1)
<br /> MW 1 9/5/2000 P 1241 2713 -1472 1,470 128 73 2 512 254 268' NM
<br /> 11/2/2000 P 2776 -1535 -0 63 1,040 138 680 18 8 101 3861280' 30
<br /> 3/5/2001 P 2713 -1472 0 63 834 125 550 20 5 127 3791376* 39
<br /> 5/8/2001 P 26 75 -1434 038 600 781 247 172 85 4 954/1,000* 057
<br /> MW-2 9/5/2000 P 1311 2760 -1449 1,330 394 1 94 34 3 104 1420* NM
<br /> 11/2/2000 P 2829 -1518 -069 10,700 169 <25 0 1,930 230 4,020/3,900' 2 6
<br /> 3/5/2001 P 27 64 -1453 065 7,750 106 176 1,580 579 12,000/2,860' 36
<br /> 5/8/2001 P 2726 -1415 038 8,750 116 154 1,900 923 3070/2,660* 0 71
<br /> MW-3 9/5/2000 P 1170 27 13 -1543 499 294 <0 50 <0 50 155 5 62* NM
<br /> 11/2/2000 P 2641 -1471 072 116 655 <0 500 <0 500 142 <2 50/29' 1 7
<br /> 3/5/2001 P 2621 -1451 020 799 6 46 <0 500 <0 500 0 653 <2 50/2 64' 3 8
<br /> 5/8/2001 P 2583 -1413 0 38 <50 0 <0 500 <0 500 <0 500 <0 500 3 6313 98* 0 48
<br /> MW-4 9/5/2000 P 11 98 26 63 -1465 166,000 10,500 43,600 5,230 25,400 708,000 NM
<br /> 11/2/2000 P 2732 -1534 -069 180,000 9,400 42,600 5,260 26,900 376,0001350,000* 3 3
<br /> 3/5/2001 P 2663 -1465 069 165,000 10,700 45,300 5,020 26,500 596,0001466,000' 4 2
<br /> 5/8/2001 P 2526 -1428 037 149,000 9,660 45,300 5,280 26,800 372,000/500,000* 044
<br /> SVE 1 9/5/2000 P 11 84 2645 1447 66 600 1,770 8 000 2 550 12 900 1 140' NM
<br /> 11/2/2000 P 2711 -1513 -066 4,750 152 469 164 823 212/1,200* 2 8
<br /> 3/5/2001 P 26 40 -1456 057 72,300 2090 10,100 2 710 14 800 12 100/3 720* 5 1
<br /> 5/8/2001 P 2604 -1420 036 45,300 1,560 5,170 1,850 9,490 6,900/4,930- 0 31
<br /> Notes
<br /> MSL=Mean sea level
<br /> TOG=Top of casing
<br /> TPHg=Total petroleum hydrocarbons as gasoline
<br /> MtBE=Methyl tert-butyl ether
<br /> DO=Dissolved Oxygen
<br /> ppb=parts per billion
<br /> mgll=milligrams per liter
<br /> PMP=Purged/Not Purged
<br /> <=Less than given laboratory detection limits
<br /> NM=Not measured
<br /> '=MtBE analyzed using EPA method 8260A
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