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' GE OTRACKER DATA UPLOAD ' The facility has been assigned a Geotracker global identification number T0607700148 DTW and laboratory data for the quarterly groundwater monitoring was submitted electronically to the State Water Resources Control Board (SWRCB) Geotracker database Additionally, analytical data associated with produced water (from the vapor wells) on Julyt 26, August 31, and October 7, 2005, was submitted electronically to the SWRCB Geotracker database Vapor data from the thermal oxidizer will be submitted electronically to the SWRCB Geotracker database when the appropriate electronic data files are received by ATC from the analytical laboratory An upload record of all submittals to the SWRCB Geotracker database for the current reporting period Including sample dates, confirmation numbers, and sample types is presented In Table 10 Documentation of the data submittal Is contained In Attachment 5 ' CONCLUSIONS ' There are petroleum hydrocarbons remaining in the soil and groundwater The direction of groundwater flow and the magnitude of hydraulic gradient are generally consistent with the previous event Groundwater elevations have decreased approximately 0 15 feet since June 2005 ' TPHg and/or BTEX constituents were detected at or above laboratory reported detection limits In groundwater samples collected from MW1, MW5, MW6, MW7, and VW2 MTBE was detected In the groundwater samples collected from MW2, MW4, MW6, MW7, MW9, and CW TBA was detected in the groundwater sample collected from MW2 The analyte 1,2-DCA was detected in the groundwater sample collected from MW8 None of the groundwater samples collected contained detectable concentrations of ETBE, TAME,DIPS, or EDB Dissolved petroleum hydrocarbon concentrations in groundwater from MW I through MW 10 and CW ' generally remain consistent with the results from previous sampling events RECOMMENDATIONS ' Based on the results of the Third Quarter 2005 monitoring event, we recommend the following ' • Conduct the Fourth Quarter 2005 groundwater monitoring and sampling of MW 1 through MW10, VWI, VW2, and CW and analyze samples for TPHg and BTEX by EPA methods 8015B and 8021 B, respectively, and MTBE, ETBE, TBA, TAME, and DIPE by EPA method 8260B ' • Perform a remediation system optimization analysis • Separate remediation system reporting from quarterly groundwater monitoring reporting Continue remediation monitoring on a monthly basis and groundwater monitoring on a quarterly ' basis Reduce the frequency of the system O&M report submittal to semi-annually Continue to submit the groundwater monitoring reports on a quarterly basis 1 s 1enviro1625961quart1yl3gr-2005 doc ATC ASSOCIATES INC