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limit in the sample collected from this well Floating product or sheens were not observed in the groundwater
<br /> removed from the monitor wells A slight petroleum hydrocarbon odor was noted in the groundwater sample
<br /> i ollected from MW-2
<br /> Laboratory analytical results of the groundwater samples collected during the second quarter, 1998, monitoring
<br /> event were generally consistent with historical quarterly groundwater analytical data Concentrations of MTBE
<br /> detected in the samples collected from MW-2 and MW-3 on June 26, 1998, appeared to reverse a trend of
<br /> Iincreasing concentrations historically detected in Samples collected from these wells
<br /> Ciroundwater elevation measurements collected at the site monitor wells on June 26, 1998, indicated that the
<br />' average depth from the ground surface to groundwater was approximately 5 feet The average depth to water at
<br /> the site was essentially the same on March 27, 1998 and June 26, 1998 Groundwater elevation contours
<br /> estimated using the depth-to-water measurements collected on June 26, 1998, indicated that the groundwater
<br /> gradient at the site was generally consistent with the estimated gradient on September 18, 1997, December 31,
<br /> 1997, and March 27 1998
<br />' On September 30, 1998, a Condor representative was on site to conduct quarterly groundwater monitoring
<br /> activities Laboratory analyses of groundwater samples collected from the site monitor wells indicated that
<br /> BTEX, TPH-G and the selected gasoline oxygenates/additives were not detected at or above the laboratory
<br /> reported detection limits in the sample collected from MW-i Ethanol, tertiary-butanol, D1PE, and ETBE were
<br />' not detected at or above the laboratory reported detection limits in any of the groundwater samples The
<br /> laboratory reported detection limits were raised for the groundwater samples collected from MW-2 and MW-3
<br /> due to relatively high concentrations of MTBE in the groundwater samples collected from those wells (as
<br />' described below) TAME was detected in the groundwater samples collected from MW-2 and MW-3 MTBE
<br /> was detected in the groundwater samples collected from MW-2, MW-3, and MW-4 Benzene, ethyl benzene,
<br /> total xylenes, and I-PH-G were not detected at or above raised laboratory reported detection limits in the
<br /> groundwater sample collected from MW-2 A low concentration of toluene was detected in the groundwater
<br /> sample collected from MW-2 BTEX and TPH_6 wer(, not detected at or above the laboratory reported detection
<br /> limits in the groundwater sample collected from MW-3 rhe laboratory detection limits associated with the
<br />' BTEX constituents were raised for this sample Relatively low concentrations of benzene, ethyl benzene, total
<br /> xylenes, and TPH-G were detected in the groundwater sample collected from MW-4 Toluene was not detected
<br /> at or above a raised laboratory detection limit in the groundwater sample collected from this well Floating
<br />' product or sheens were not observed in the groundwater purged from the monitor wells Petroleum hydrocarbon
<br /> odors were not detected in the groundwater samples collected from the four monitor wells
<br /> Laboratory analytical results of the groundwater samples collected during the third quarter, 1998, monitoring
<br /> event were generally consistent with historical quarterly groundwater analytical data Concentrations of MTBE
<br /> detected in the samples collected from MW-2 and MW-3 increased significantly with respect to the second
<br /> 1 quarter 1998 laboratory analytical results The concentration of MTBE reported for the sample collected from
<br /> MW-3 on September 30, 1998, was a historical high for this constituent in samples collected from this well
<br />' Groundwater elevation measurements collected at the site monitor wells on September 30, 1998, indicated that
<br /> the average depth from the ground surface to groundwater was approximately 5 6 feet The average depth to
<br /> water at the site increased by approximately one-half foot between June 26, 1998 and September 30, 1998
<br />' Groundwater elevation contours estimated using the depth-to-water measurements collected on September 30,
<br /> 1998, indicated that groundwater gradient at the site was generally consistent with the estimated gradient on
<br /> September 18, 1997, December 31, 1997, March 27, 1998,and June 26, 1998
<br /> On October 1, 1998, a Condor representative was on site to conduct quarterly surface water sampling activities
<br /> and collect a sample of the marina's pre-treated and treated drinking water from the facility's water treatment
<br /> system Laboratory analyses of the surface water samples indicated that a low concentration of toluene was
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