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Quik Stop Station No 039 March S, 2005 " <br /> Stockton,California Quarterly Groundwater MonitoringLReport <br /> methyl ether (TAME), tert-butanol (TBA), 1,2-dichloroethane (DCA) and 1,2- <br /> dibromoethane by Environmental Protection Agency(EPA) Method 8260B <br /> Groundwater Monitoring Results <br /> Depth-to-groundwater measurements were subtracted from the surveyed TOC elevations <br /> to calculate static groundwater elevations Groundwater elevation data was used to <br /> construct a groundwater contour map (Figure 2) The groundwater flow direction for this <br /> sampling event was southward under a gradient of approximately 0 001 <br /> Groundwater analytical results are summanzed in Table 1 The groundwater analytical <br /> report is contained in Attachment C On February 22, 2005, Honzon transported the <br /> monitoring well purge water to InStrat, Inc in Rio Vista, California for disposal Non- <br /> hazardous water transport form and payment receipt for acceptance of the purge water are <br /> contained in Attachment D <br /> Geo tracker Electronic Data Deliverables <br /> The analytical electronic data deliverable (EDD) is prepared by Kiff and uploaded by <br /> Horizon The groundwater well measurement file EDD for this quarterly monitoring <br /> event was prepared and uploaded by Horizon The EDD confirmation sheets for this <br /> quarterly event are contained in Attachment E <br /> Recommendations <br /> Horizon recommends continuous quarterly monitoring dunng the ongoing investigation <br /> On February 26, 2003, Horizon submitted Results of the Additional Subsurface <br /> Evaluation and Work Plan Addendum dated February 14, 2003 Horizon received <br /> approval of the work plan from San Joaquin County Environmental Heath Department in <br /> July 2004 Monitoring wells MW-4, MW-5 and MW-6 were installed in November <br /> 2004 The report on the installation of the additional wells is in preparation <br /> -Report-Distribution <br /> We recommend a copy of this report be forwarded to <br /> Mr Michael J Infurna Jr , Senior R E H S <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue, Third Floor <br /> P O Box 388 <br /> Stockton, California 95201-0388 <br /> 7039gmr05Q I doe <br /> Projeu No 7039 46 2 HORIZON ENVIRONMENTAL INC <br />