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ATC Associates Inc <br /> 1117 Lone Palm Avenue, Suite B <br /> Modesto, California 95351 <br /> 209-579-2221 <br /> A S S O C I A T E S ! N C Fax 209-579-2225 <br /> ' GEOTRACKER DATA UPLOAD <br /> ' The DTW and laboratory data were submitted electronically to the State Water Resources <br /> Control Board (SWRCB) Geotracker database as indicated below The facility has been assigned <br /> a Geotracker global identification number T0607700051 <br /> ' CONFIRMATION# SAMPLE TYPE <br /> 5587117075 Quarterly Momto -DTV <br /> ' 7675774693 Groundwater Anal cal Data(Quarterly) <br /> 7871957361 Tuiy system Monitonn -Vapor Anavt,,aI <br /> 4305618226 August System Momtonn -Vapor Analytical <br /> ' 7854159295 S tember S stem Momto -V r Anal cal <br /> Documentation of the Geotracker data submittal is contained in Attachment 5 <br /> ' CONCLUSIONS <br /> Groundwater elevations across the monitoring well network have an average net decrease of 0 92 <br /> feet since the May 24, 2006 monitoring event The direction and magnitude of groundwater flow <br /> is consistent with previous events Additional groundwater monitoring and system performance <br /> data is necessary to evaluate if the vapor extraction system is affecting the hydraulic conditions <br /> beneath the site <br /> ' MW2 has the highest concentrations of TPHg and BTEX at the site Concentrations of TPHg <br /> decreased in MW 1 and MW2 and increased in monitoring wells MW3 through MW6 when <br /> compared with the results from previous sampling event <br /> ' Concentrations of BTEX decreased to the samples collected from MW 1 and MW2, decreased <br /> where detected in MW3 and where detected increased or stayed the same in MW4 and MW5 with <br /> respect to the previous monitoring event BTEX fluctuated in the samples collected from <br /> monitoring well MW6 with respect to the previous monitoring event <br /> MW6 has the highest concentration of MTBE at the site Concentrations of MTBE decreased in <br /> the samples collected from MWI and MW2, stayed the same in MW3 and decreased in MW4, <br /> MW5 and MW6 with respect to the previous monitoring event <br />' Target analytes remain non-detected at method detection limits in samples collected from om MW8, <br /> MW9, and the domestic well, DW <br /> Since September 2005, the system has successfully removed 14570 7I pounds of CROs <br /> S 154 2951 000110&M11st-qtr 2006&C 7 <br />