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A S S O C I A T E S I N C collected from wells MW3 and MWS and the on-site domestic well contained no detectable concentrations of TPHg, TPHd, BTEX, MTBE, TBA, DIPE, ETBE, TAME, 1,2-DCA, or EDB The groundwater samples collected from wells MW1, MW5, and MW6 contained detectable concentrations of MTBE The groundwater samples from wells MW1, MWS, MW6, and MW9 contained detectable concentrations of 1,2-DCA The groundwater samples collected from wells MW 1 and MW6 contained detectable concentrations of TBA The groundwater samples collected from wells MW2, MW3, MW4, MW8, MW9, and the on-site domestic well contained no detectable concentrations of TPHd, MTBE, TBA, DIPE, ETBE, TAME, or EDB although the reporting limit for MW2 was elevated due to dilution Analytical results of groundwater samples are summarized in Table 2 and laboratory data sheets are contained in Attachment 2 GEOTRACKER DATA UPLOAD The depth to water data was submitted electronically to the State Water Resources Control Board (SWRCB) Geotracker database (confirmation number 5066497623) and the laboratory data was also submitted electronically to the SWRCB Geotracker database (confirmation number 6169295370) The facility has been assigned a Geotracker global identification number T0607700051 Documentation of the data submittal is contained in Attachment 3 RECOMMENDATIONS Based on the results of the second quarter 2004 monitoring event,we recommend the following • Continue quarterly monitoring and analyze samples from the monitoring wells for TPHg, BTEX, MTBE, ETBE, DIPE, TBA, TAME, 1,2-DCA, and EDB Discontinue all TPHd analyses • An Interim Remediation. Plan (IRP) dated March 25, 2004 and an addendum to IRP dated April 9, 2004, to install and operate a Vapor Extraction System was approved in a letter from SJCEHD dated April 23, 2004 The system is being scheduled for installation this summer S\Envtromenta112529I\reportsl2QR-2004 doe 3