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Table 1 - Groundwater Monitoring Data <br /> Beacon Station No. 474 <br /> 3443 East Main Street,Stockton, California <br /> I <br /> Well Date TPHg B T E X Depth to TOC GW <br /> Number ug/L uglL ug/L ug/L ug/L GW Elevation Elevation Comments <br /> MW-9 03/31/98 <50 <0.50 <0.50 <0.50 <0.50 62.59 26.58 -36.01 reported as MW-lA <br /> screen 06/10/918 66 <0.50 <0.50 <0.50 <0.50 59.91 -33.33 reported as MW-IA <br /> interval 09/08/98 <50 <0.50 <0.50 <0.50 <0.50 59.99 -33.41 no odor 1 no sheen <br /> 56.'.-76' 12/30/98 <50 <0.50 <0.50 <0.50 <0.50 58.01 -31.43 no odor/no sheen <br /> 03/25/99 <50 <0.50 <0.50 <0.50 <0.50 56.02 -29.44 no comment <br /> 06/03/99 92 <0.50 <0.50 1.0 5.7 55.43 -28,85 no comment <br /> VW-1 '09/08/98 170,000 36,000 47,000 3,300 24,000 58.88 NM nc strong odor 1 no sheen <br /> screen 12/30/98 190,000 34,000 49,000 3,300 24,000 57.10 nc Petrol. odor/no sheen <br /> 63/25/99 260,000 37,000 55,000 4,800 32,000 55.05 nc no comment <br /> 50'-65' 06/03/99 120,000 . 20,000 26,000 3,500 23,000 54.19 nc no comment <br /> VW-4 09/08/98 86,000 1 19,000 . 6,900 3,100 20,000 59,10 NM nc strong odor/no sheen <br /> screen 12/30/98 79,000 29,000 1,600 3,700 16,000 57.28 nc Petrol. odor 1 no sheen <br /> 03/25/99 89,000 I4,000 2,700 3,200 13,000 55.23 ne no comment <br /> 50'-65' 06/03/99 39,000 10,000 1,600 2,900 11,000 , 54.44 nc no comment <br /> Notes: <br /> TPHg=total petroleum hydrocarbons as gasoline na=not analyzed <br /> 4 B-benzene ns=not sampled <br /> T=toluene nm=not measured <br /> E=ethylbenzene NM =Not Measured <br /> X -.xylenes nc-not calculated a <br /> i <br /> R II <br /> ail 1 <br /> I I <br /> I <br /> b i <br /> 99QMTable.Q2 Page 3 of 3 HORIZON ENVIRONMENTAL INC. <br /> ii <br />