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I ' 31 August 2000 AGE Project No 96-0232 ' Page 8 of 25 ' samples at concentrations as high as 5,500µg/1 (MW-1) TPH-g was detected in a sample collected from MW-12A at a concentration of 120µg/1 TPH-d was detected in five samples at concentrations as high as 480µg/1(MW-12A) BTEX compounds were detected in samples ' from MW-12A (10 to 20 feet) and MW-I3A(10 to 20 feet)at concentrations of 25 µg/1 and 16µg/1, respectively TAME was detected in the MW-13A sample at a concentration of 15 µg/1, TBA was detected in sample MW-lOE (130 to 150 feet) at a concentration of 5 2 µg/1 ' Ethanol was detected in 18 samples at concentrations as high as 110,000µg/1 A grab ground water sample collected from RDW-1 contained MTBE at a concentration of 16 µg/1, ethanol was detected in the RDW-1 and DW-1 samples at concentrations of 550µg/1 and 1,600µg/l, ' respectively AGE determined that the high ethanol concentrations detected in samples collected from the multi-level wells appeared to be due to introduction of the coated ' bentomte pellets during well construction A report of findings ((?uarterly Report- Second Quarter 2000, dated 19 July 2000) documenting investigation activities performed in May 2000 was prepared by AGE and submitted to the PHS-EHD and the RWQCB ' May 2000-Interim remedial action was continued at the site by pumping ground water from EW-1 at a rate of 2 gallons per minute into a 5,900-gallon above ground storage Baker tank A total of three grab ground water samples were collected from EW-1 in May 2000 ' Dissolved MTBE was detected at concentrations as high as 800µg/1 The steadily decreasing concentrations of MTBE quantified in ground water samples collected from EW-1 may indicate initial plume control and plume mass reduction in the area of EW-1 A report of ' findings (Quarterly Report - Second Quarter 2000, dated 19 July 2000) documenting investigation activities performed in May 2000 was prepared by AGE and submitted to the ' PHS-EHD and the RWQCB • 29 June 2000 - Monthly ground water samples were collected from wells MW-1 through MW-13 General ground water flow direction in the first aquifer zone was towards the ' northeast and northwest at a general gradient of 0 002 Laboratory analysis of ground water samples detected MTBE at concentrations as high as 5,700 µg/1 (MW-1) TPH-g was detected in samples collected from MW-9A and MW-11B at concentrations of 180 and. ' 62 µg/1, respectively TPH-d was detected in MW-6A, MW-9A, MW-11B and MW-12A samples at concentrations as high as 530µg/1 (MW-12A) Ethanol was detected in samples from MW-8C,MW-9A,MW-1OC,MW-IOD,MW-11B,MW-11C,MW-12B and MW-12D ' at concentrations as high as 120,000 ug/l (MW-11B) A grab ground water sample collected from RDW-1 contained MTBE at a concentration of 9 9µg/1 A report of findings(Quarterly ' Report - Second Quarter 2000, dated 19 July 2000) documenting investigation activities performed in June 2000 was prepared by AGE and submitted to the PHS-EHD and the RWQCB ' June 2000-Interim remedial action was continued at the site by pumping ground water from EW-1 at a rate of 2 gallons per minute into a 5,900-gallon above ground storage Baker tank A total of five grab ground water samples were collected from EW-1 in June 2000 Dissolved I Advanced GeoEnvironmcntal,Inc I