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i <br /> I � Ouanti of the Release <br /> The quantity of petroleum hydrocarbons released from the former gasoline UST area is unknown <br /> ?�� Production Water Nell Search <br /> IBlaes Environmental contacted Vista Environmental Research (Vista) to provide a search of regulatory <br /> agency records regarding nearby production wells using an environmental assessment database The Vista <br /> report did not indicate the position of the wells (if any) As a result, Blaes Environmental is planning to <br /> conduct nearby well research during the next quarterly groundwater monitoring event scheduled for July <br /> I2001 <br /> 2.3 PREVIOUS RESULTS <br /> Previous work performed. by Blaes Environmental included two quarters of groundwater monitoring <br /> Icompleted in June and September 2000 These two quarterly groundwater monitoring events included <br /> sample collection from all possible monitoring points The list of well casings available for groundwater <br /> Imonitoring and sampling is provided on Table 1 <br /> 2.3.1 Previous Groundwater Level Measurements <br /> As noted in other reports, three well zones exist at the site The original wells installed at the site <br /> (without a letter designation behind the number) are screened in the lowest part of the aquifer The wells <br /> with a letter designation"A"behind the number( and well MW-4B) are wells screened in the upper zone <br /> (highest zone) The wells with a letter designation "B" behind the number (except MW-4B) are wells <br /> screened in the middle zone between the original wells and the"A"wells <br /> Previous groundwater level measurements indicated a drop in water levels from June 2000 to September <br /> �' P p <br /> I 2000 Groundwater level measurements recorded in June 2000 ranged from 42 25 feet below ground <br /> surface (bgs) at MW-7 to 45 68 feet bgs at MW-6 Groundwater level measurements recorded in <br /> September 2000 ranged from 50 84 feet bgs at MW-4B to 53 10 feet bgs at MW-2 In September 2000, <br /> groundwater levels dropped approximately eight feet compared with measurements collected in June <br /> I 2000 In June and September 2000, groundwater elevations ranging from 24 49 and 26 23 feet below <br /> mean sea level to 32 24 and 32 58 feet below mean sea level, respectively No free-phase hydrocarbons <br /> were observed during collection of groundwater level measurements <br /> 07/10/01 <br /> Blaes Project#002-70950-02 4 bjm C 1BLAESIU-Hau1170950170950r101 doe <br /> 1 <br />