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ATC Associates Inc <br /> v 1117 Lone Palm Avenue, Suite B <br /> Modesto, Califorma 95351 <br /> 209-579-2221 <br /> Fax 209-579-2225 <br /> ' ASSOC i ATE S INC <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 /> 6648533701 System Momto -Vapor Anal cal -April <br /> 8604860782 System Monitoring-Vapor Analytical -May <br /> ' 2033488392 System Monitoring-Vapor Analytical-June <br /> 9947056412 Quarterly Monitoring-DTW <br /> 4813696742 Groundwater Analytical Data(Quarterl <br /> ' Documentation of the data submittal is contained in Attachment 5 <br /> ' CONCLUSIONS <br /> Groundwater elevations across the monitoring well network have an average net decrease of 1 10 <br /> IPfeet since the February 17, 2006 groundwater-monitoring event The direction and magnitude of <br /> groundwater flow is consistent with previous events <br /> ' MW2 continues to have the overall highest concentrations of TPHg and BTEX at the site Where <br /> detected, GRO concentrations generally increased in MW2 TPHg generally decreased in MW 1 <br /> and MW3 through MW6 Where detected, BTEX components fluctuated with some analytes <br /> increasing and some decreasing when compared with the results from previous sampling event <br /> MTBE was present to MW 1 through MW6 It was present in relatively low or low concentrations <br /> ' in MW1, MW2, MW3, MW4, and MW5 MTBE was present in a significant concentration in <br /> MW6 Increases in MTBE were observed in MW2, MW3, MW4, MW5 and MW6 where <br /> ' compared with the February 17, 2006 monitoring event The only well in which the increase was <br /> significant was In MW6 where it was detected at a concentration of 150 ug/L during the February <br /> 17, 2006 event and at a concentration of 200 ug/L during this event <br /> Target analytes remain non-detected at method detection limits in samples collected from MW8, <br /> MW9, and the domestic well (DM) located on site <br /> Since September 2005, the system has successfully removed 13,451 22 pounds of TPHg <br /> S%2588\031gaaftaly\2-nd qP-"06 doe 7 <br />