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1 <br /> 16 Geofiogicaf Technics Inc. <br /> ' 2741 River9Rgad <br /> Wodesto,Cahforim 95351 <br /> (209)538-6424ITar,#538-5852 <br /> ' REPORT <br /> Groundwater Monitoring <br /> ' 2°d Quarter 2001 <br /> Cardoza <br /> Super Stop Market <br /> 290 N. Main St. <br /> ' Manteca, CA <br /> Project No 662 2 <br /> ' June 12, 2001 <br /> EXECUTIVE SUMMARY <br /> ' This report summarizes the 2" Quarter 2001 groundwater monitoring and testing work that <br /> took place on April 27, 2001 The test results show that detectable concentrations of the <br /> ' oxygenated fuel compound MTBE were detected in two of the three wells BTEX and <br /> TPH-G were not detected in any of the groundwater samples This data is consistent with <br /> past events as this is the sixth consecutive monitoring event in which these conditions are <br /> ' present <br /> The average depth to groundwater at the site was 20 72 feet bgs Groundwater gradient <br /> calculations show that groundwater flow was N2°W with a slope of 0 018 ft/ft The <br /> dominant groundwater direction has been to the east-northeast during the investigation The <br /> direction calculated for April 27, 2001 was to the north and may be anomalous for the site <br /> Further monitoring will determine the range of groundwater gradients experienced at this <br /> site <br /> 1 <br /> • <br />