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,p <br /> i <br /> { <br /> L <br /> Ceolo ical Technics Inc. <br /> 1101 7'h Street <br /> Modesto,California 95354 <br /> (209)522-4119/Fax(209)522-4227 <br /> r REPORT <br /> ' Groundwater Monitoring <br /> V Quarter 2002 <br /> ' Marci Property <br /> 2969 Loomis Road <br /> ' Stockton, CA <br /> Project No 770 2 <br /> May 14, 2002 <br /> EXECUTIVE SUMMARY <br /> ' The site's seven groundwater monitoring wells are sounded and sampled on a quarterly <br /> schedule This report summarizes the I" Quarter 2002 round of groundwater monitoring <br /> ' and testing that took place on March 11, 2002 <br /> The analytical results from groundwater samples indicate that diesel range petroleum <br /> ' hydrocarbons are present in four of the site's seven wells Well MW-5 contained 16,800 <br /> lig/1 TPH-D and this is the highest level detected since the well's installation in August <br /> 2000 The concentrations detected in this well exhibit an increasing trend since the start of <br /> ' the monitoring program, except for a slight downturn in the Fall of 2001 <br /> Oxidation-Reduction Potential measurements show that four of the site's seven monitoring <br /> wells are within the reaction depleted water caused by biodegradation of the contamination <br /> plume <br /> ' Groundwater gladient calculations show that groundwater flow was S54°E with a slope of <br /> 0 0004 ft/ft Based on a previous consultant's data, this site has a history of variable <br /> ' groundwater flow direction GTI's monitoring efforts confirm that groundwater direction <br /> varies from quarter to quarter at the site <br /> r <br />