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<br /> gasoline oxygenates/additives were detected at or above the laboratory reported detection limits in any of the
<br /> surface water samples
<br /> I On March 26 1999 C ondor conducted first quarter, 1999, groundwater and surtace water monitoring at Herman
<br /> & Helen s Marina I aboratory analytical results of the groundwater samples collected during the first quarter,
<br /> 1999, monitoring event were generally consistent with historical quarterly groundwater analytical data
<br /> Groundwater elevation measurements collected at the site on March 26, 1999, indicated that the average depth to
<br /> groundwater was approximately 5 5 feet below the monitor well and surface water station measuring points This
<br /> average depth to water is 0 1 feet greater than the average depth to water measured on December 30, 1998
<br /> Groundwater elevation contours for March 26, 1999, indicated that the groundwater gradient at the site was
<br /> generally consistent with the historical groundwater gradient
<br /> ILaboratory analytical results of the surface water samples collected during the first quarter, 1999, monitoring
<br /> event were generally consistent with historical surface water analytical data for BTEX and TPH-G MTBE,
<br /> however, was detected for the first time in the sample collected from LDCW (2 2 }rg/l) MTBE was detected in
<br /> samples DDN and DDS at significantly higher concentrations during the first quarter, 1999, monitoring event
<br /> (980 and 3,500 pg/1, respectively) than in prior monitoring events Additionally, TAME was detected for the
<br /> Ifirst time to samples DDN and DDS
<br /> On June 30, 1999, Condor conducted second quarter, 1999, groundwater and surface water monitoring at Herman
<br /> & Helen's Marina Laboratory analytical results of the groundwater samples collected during the second quarter,
<br /> 1999, monitoring event were generally consistent with historical quarterly groundwater analytical data
<br /> I. Groundwater elevation measurements collected at the site on .lune 30, 1999, indicated that the average depth to
<br /> groundwater was approximately 6 2 feet below the monitor well and surface water station measuring points This
<br /> average depth to water is 0 7 feet greater than the average depth to water measured on March 26, 1999
<br /> Groundwater elevation contours for June 30, 1999, indicated that the groundwater gradient at the site is generally
<br /> consistent with the historical groundwater gradient
<br /> ILaboratory analytical results of the surface water samples collected during the second quarter, 1999, monitoring
<br /> event were generally consistent with historical surface water analytical data MTBE was detected for the second
<br /> time in the sample collected from LDCW (1 4 µg11) MTBE was detected in samples DDN and DDS at
<br /> significantly lower concentrations during the second quarter, 1999, monitoring event (5 4 and 1 8 gg/I,
<br /> respectively) than in the first quarter, 1999 monitoring event Additionally, TAME was not detected in any of
<br /> the surface water sample during the second quarter, 1999, monitoring event
<br /> IOn September 23, 1999, Condor conducted third quarter, 1999, groundwater and surtace water monitoring at
<br /> Herman & Helen's Marina Laboratory analytical results of the groundwater samples collected during the third
<br /> quarter, 1999, monitoring event were generally consistent with historical quarterly groundwater analytical data
<br /> However, benzene, and total xylenes were detected for the first time in the groundwater sample collected from
<br /> MW-3
<br /> Groundwater elevation measurements collected at the site on September 23, 1999, indicated that the average
<br /> depth to groundwater was approximately 6 5 feet below the monitor well and surface water station measuring
<br /> points This average depth to water is 0 3 feet greater than the average depth to water measured on June 30,
<br /> I 1999 Groundwater elevation contours for September 23, 1999, indicated that the groundwater gradient at the
<br /> site was generally consistent with the historical groundwater gradient
<br /> I The laboratory analytical surface water sample data for the third quarter, 1999, monitoring event were generally
<br /> representative of historical data, with the exception of the first quarter, 1999, data During the first quarter, 1999,
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