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1 gasolinc OvN1acnatcs addItncs weic detected It nr above tilt, lahoiatory reported detection limits in any of the surface ctiate: sa:riplcs • On Mateh 2() 1999 ( ondoi conducted tirstuartct 1999 groEandwatc,r and surface water monitorml= at Herman q L & Helen s Matrria I aboiatory anaktical results of the groundwater samples collected during the first quarter 1999 monitoring cvcnt were p,enerally consistent with Historical quarterly groundwater analvocal data (Jroundwalc: cic4atroii nrcasurcmcnts cc7ilected at the site on March '16 1999 indicated that the aveiagc depth to grotrndwatel �tias ippiokiinately > 5 feet below the ninnitor well and surface water station inLasuring points Fhis average rfcpth to eater !s 0 1 feet gteatei than the avcragt depth to water measured on Deccmbcr 30 1998 Groundwater elc:v,rtroli tontntns for March ''6 1999 indicated that the groundwater gradient at the site was gLI1Lrally uinststcnt with the historical groundwater giadicnt ' I aboraton, analytical lcsttlts Of tl1c Surface water samples collected during the first quarter, 1999 monitoring cvcnt were gcncrally consistent with historical surface water analytical data for B11-:X and TPP-() M FBE ' however was detected for the first tirric in the sample collected from IDCW (2 2 µg/1) MTBE was detected in samples DDN and DDS at significantly higher concentrations during the first quarter, 1999, monitoring event (980 and 3,500 µg/l respectively) than In prior monitoring events Additionally, TAML was detected for the ' first time in samples DDN and DDS On June 30 1999, ( ondor conducted second quarter, 1999, groundwater and surface water monitoring at Herman ' & Helen's Mar ma I aboratory analytical results of the groundwater samples collected during the second quarter, 1999 monitoring event were generally consistent with historical quarterly groundwater analytical data Groundwater elevation measurements collected at the site on June 30, 1999 indicated that the average depth to • groundwater was approximately 6 2 feet below the monitor well and surface water station measuring points Phis average depth to water is 0 7 feet greater than the average depth to water measured on March 26 1999 Groundwater LILvation contours for June 30, 1999, indicated that the groundwater gradient at the, sate IS generally consistent with the historical groundwater gradient Laboratory analytical results of the surface water samples collected during the second quarter, 1999 monitoring event were generally consistent with historical sur face water analytical data MTBL was dctected for the second. time In the sample collected from IDCW (1 4 �tg/l) MTBE was detected in samples DDN and DDS at significantly l[nvcl cunccntiationti during the second quarter 1999 monitoting event (5 4 and 1 8 µg/l, respectively) than in the first quarter 1999 monitoring event Additionally FAME was not dLtectcd in any of the suitatre watts sample du:mg the second quarter, 1999 monitoring event On September 23 1999 ( ondor conducted third quarter, 1999 groundwater and surface water monitoring at Berman & Helen s Marina Laboratory analytical results of the groundwater samples collected dui Ing the third quarter 1999 monitoring event were generally consistent with historical quarterly groundwater analytical data However benzene and total xylenes were detected for the first time in the gioundwatei sample collected from MW-3 IGroundwater elevation measurements collected at the site on September 23 1999, Indicated that the average depth to "Iaundksatci was approximately 6 5 feet belo�N the monitor well and surface water ;tatlon measuring points This average depth to water is 0 3 feet greater than the average depth to water measured on June 30, 1999 Gioundwatei elevation contours for September 23, 1999, indicated that the groundwater giadient at the site was generally consistent with the historical groundwater gradient The laboratory analytical surface water sample data for the third quarter, 1999, monitoring event were generally I representative of historical data, with the exception of the first quarter, 1999, data During the fust quarter, 1999, I