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Cycolog cd Technics JAC, <br /> ' 1 101 71h Street <br /> Modesto,California 95354 <br /> (209)522-4119/Fax(209)522-1227 <br /> 1 <br /> ' REPORT <br /> Groundwater Monitoring <br /> 3" Quarter 2002 <br /> Marti Property <br /> 2969 Loomis Road <br /> ' Stockton, CA <br /> Project No 770 2 <br /> ' January 17, 2003 <br /> EXECUTIVE SUMMARY <br /> The site's eleven groundwater monitoring wells are sounded and sampled on a quarterly <br /> schedule This report summarizes the 3`d Quarter 2002 monitoring event completed on <br /> ' September 13 & 17, 2002 (well MW-3 was inaccessible on September 13) <br /> The analytical results from groundwater samples indicate that diesel range petroleum <br /> hydrocarbons (TPH-D) are present in five of the site's eleven wells'/Well MW-5 continues <br /> to contain elevated concentrations of TPH-D and the well had previously exhibited an <br /> increasing trend at the start of the monitoring program <br /> Oxidation-Reduction Potential measurements show that seven of the site's eleven <br /> monitoring wells are within the reaction depleted water caused by biodegradation of the <br /> ' contamination plume <br /> ' Groundwater gradient calculations show that groundwater flow in the water table wells was , <br /> S 15°E with a slope cif 0 017 ft/ft)The deeper aquifer groundwater flow was S 84°E with a <br /> slope of 0 0019 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 />