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0 <br /> ATC Associates Inc <br /> 1117 Lone Palm Avenue, Suite B <br /> . (: <br /> Modesto, California 95351 <br /> 209-579-2221 <br /> A s s o c i a r e s i N c Fax 209-579-2225 <br /> GEOTRACKER DATA UPLOAD <br /> The depth to water data was submitted electronically to the State Water Resources Control Board <br /> (SWRCB) Geotracker database (confirmation number 1167783975) and the laboratory data was <br /> also submitted electronically to the SWRCB Geotracker database (confirmation numbers <br /> 9812046885, 3703805088 and 7812654793) The facility has been assigned a Geotracker global <br /> identification number T0607700046 Documentation of the data submittal is contained in <br /> Attachment 4 <br /> CONCLUSIONS <br /> Target analytes have never been detected at method detection limits in MW5 and MW9 since <br /> sampling began MW1, MW2, and MW10 remain generally consistent with the results from the <br /> previous sampling event Target analytes have not been detected at method detection limits in <br /> MW 10 since June 22, 2004 MW3, MW6, MW8 and the domestic well have shown increases in <br /> petroleum hydrocarbons MW4 and MW7 concentrations have shown reductions from the <br /> previous sampling event <br /> The direction of groundwater flow continues to be variable across the site, with a general <br /> southerly gradient Groundwater elevations have increased since December 2004 <br /> RECOMMENDATIONS <br /> Based on the results of the first quarter 2005 monitoring episode, we recommend the following <br /> • Conduct the Second Quarter 2005 groundwater monitoring and sampling of MW1 <br /> through MW10 and DW Analyze samples for TPHg, BTEX, and MTBE by EPA <br /> Method 8015B / 8260 <br /> • Change out 1 CC and 2CC due to breakthrough exhibited in the March 4, 2005 sampling <br /> event <br /> • <br /> S 1163931REPORTSIIstgtr-2005 doe 5 <br />