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c <br /> F C,eological Terms lir. <br /> 2741 liver Road <br /> Modesto,California 95351 <br /> (209)538-6424/Fax#538-5852 <br /> ' REPORT <br /> Groundwater Monitoring <br /> 3rd Quarter 2001 <br /> ' Marci Property <br /> 2969 Loomis Road <br /> ' Stockton, CA <br /> Project No 770 2 <br /> November 13,2001 <br /> EXECUTIVE SUMMARY <br /> The site's seven groundwater monitoring wells are sounded and sampled on a quarterly <br /> schedule This report summarizes the 3"' Quarter 2001 round of groundwater monitoring <br /> and testing that took place on September 19, 2001 <br /> The analytical results from the wells indicate that detectable concentrations of diesel range <br /> ' petroleum hydrocarbons are present in all seven of the sae's wells Gasoline range <br /> petroleum hydrocarbons were detected in four of the groundwater wells <br /> ' Oxidation-Reduction Potential measurements show that all seven monitoring wells are <br /> within the reaction depleted water caused by biodegradation of the contamination plume <br /> ' Groundwater gradient calculations show that groundwater flow was S25°E with a slope of <br /> 0 001 ft/ft Based on a previous consultant's data, this site has a history of variable <br /> ' groundwater flow direction GTI's computed direction for this fifth consecutive event <br /> confirms that groundwater direction varies from quarter to quarter at the site <br />