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Geological Z"ecaWks Inc. <br /> 2741�Rper mad <br /> Modesto,CaCfornTa 95351 <br /> (209)538 6424/'FaX#538-5852 <br /> ' REPORT <br /> Groundwater Monitoring <br /> 4" Quarter 2000 <br /> Valentine (Castle Motors) <br /> 2315 N. El Dorado St. <br /> Stockton, CA <br /> Project No 723 2 <br /> January 29, 2001 <br /> EXECUTIVE SUMMARY <br /> 1 This report summarizes the 4'" Quarter 2000 round of groundwater monitoring and testing <br /> that took place on December 4, 2000 The laboratory results indicate that <br /> Detectable concentrations of the aromatic hydrocarbon compounds (BTEX) and gasoline <br /> range petroleum hydrocarbons (TPH-G) are present in all seven monitoring wells on site <br /> The groundwater elevations decreased approximately 0 99 feet since the August 29, 2000 <br /> monitoring event Groundwater gradient calculations show that groundwater flow is due <br /> south at 0 0046 ft/ft Prior to this event the direction has been predominantly to the <br /> northeast <br /> The domestic well at 60 E Castle Avenue was sampled and found to be free of <br />' contaminants for the second consecutive event <br />