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Cje0t0g1 t TeChgla MC <br /> ' 1101 7" street <br /> Modesto,Cahforma 95354 <br /> (209)522-4119/Fae(209)522-4227 <br /> 1 <br />' REPORT <br /> Groundwater Monitoring <br /> ' 2"d Quarter 2004 <br /> Marci Property <br /> 2%9 Loomis Road <br /> Stockton, CA <br />' Project No 770 2 <br /> August 27, 2004 <br /> EXECUTIVE SUMMARY <br /> a The site's eleven groundwater monitoring wells are sounded and sampled on a quarterly <br /> schedule This report summarizes the 2nd Quarter 2004 monitoring event completed on June <br /> 7, 2004 <br />' The analytical results from groundwater samples indicate that diesel range petroleum <br /> hydrocarbons (TPH-D) are present in three of the site's eleven wells Well MW-5 continues <br />' to contain elevated concentrations of TPH-D although the concentrations continue to <br /> fluctuate since the start of the monitoring program <br />' Depth to groundwater was measured during second quarter of 2004 On June 7, 2004, the <br /> shallow aquifer flow was S35 E with a slope of 0 002 ft/ft, and the deeper flow was S59°E <br /> -- - --with-a slope of 0 002-ft/ft - - - - - - -- - - - - <br />' Based on a previous consultant's data this site has a history of variable groundwater flow <br /> direction The deeper aquifer experienced a 180° reversal of groundwater direction for the <br />' April and May 2003 sounding events and Gn's monitoring efforts confirm that groundwater <br /> direction vanes from month to month at the site There are numerous agricultural, <br /> commercial and residential wells near the Marci parcel and the influences from these wells <br />' are the probable cause for the groundwater direction fluctuations <br />