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1 <br /> 05 September 2002 <br />' GE-NC Project No. 95-0100 <br /> Page 9 of 9 <br />' was 0.73 micrograms per liter(gg/1) and 41 gg/l, respectively. <br /> • Two of the three domestic wells on the subject property are active. Domestic well DW-3 was <br />' drilled in 1992 to a maximum depth of 200-feet bsg. This well is screened from 160 to 200- <br /> feet bsg and has a 100-foot thick sanitary seal. AGE assumes that the other wells are <br /> constructed in a similar fashion.Since the MTBE plume has appeared stable in terms of extent <br /> and the concentrations have been declining over the last 1.5-years, it does not appear that <br />' these wells have been negatively impacted by the MTBE. <br /> Based on the confirmatory boring soil results and the quarterly ground water monitoring analytical <br />' results, the evidence of reduced MTBE concentrations in the ground water, the stabilized MTBE <br /> plume dimensions, the lack of MTBE detection in the domestic wells and the isolation of the highest <br /> hydrocarbon concentrations in the soil occurring 30-feet above ground water,AGE requests that the <br />' SJC-EHD consider granting a closure for this site. <br />' 5.0. LIMITATIONS <br /> Our professional services were performed using that degree of care and skill ordinarily exercised by <br /> environmental consultants practicing in this or similar localities. The findings were based mainly upon <br />' analytical results provided by an independent laboratory. Evaluations ofthe hydrogeologic conditions <br /> at the site for the purpose of this investigation were made from a limited number of available data <br /> points, and subsurface conditions may vary away from these data points. No other warranty, <br /> expressed or implied, is made as to the professional interpretations, opinions and recommendations <br /> contained in.this report. <br /> Advanced GeoEnvironwental,Inc. <br />