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Ge0logica I Techgics Ina <br /> ' 1 101 7'h Street <br /> Modesto,California 95354 <br /> (209)522-4119/Fax(209) 522-4227 <br /> ' REPORT <br /> Groundwater Monitoring <br /> 4u' Quarter 2003 <br /> Marci Property <br /> 2969 Loomis Road <br /> Stockton, CA <br /> Project No 770 2 <br /> March 31, 2004 <br /> MEXECUTIVE SUMMARY <br /> The site's eleven groundwater monitoring wells are sounded and sampled on a quarterly <br /> schedule This report summarizes groundwater sounding events on October 20 and <br /> November 25, 2003, and the 4" Quarter 2004 monitoring event completed on December 16, 11) <br /> t2003 <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 although the concentrations continue to <br /> fluctuate since the start of the monitoring program <br /> ' <br /> Depth to groundwater was measured three times during the fourth quarter of 2003 On <br /> p g g <br /> ' October 20, 2003 gradient calculations show that groundwater flow in the water table wells <br /> was S70°E with a slope of 0 001 ft/ft ' The deeper aquifer groundwater flow was S89°W <br /> with a slope of 0 0012 ft/ft 'On November 25, 2003, thVhallow aquifer flow was S77°E m 1516'1 <br /> with a slope of 0 001 ft/ft and the deeper flow was S83W with a slope of 0 001 ft/ft On 41 <br /> ' December 16, 2003, the shallow aquifer flow was S57°E with a slope of 0 001 ft/ft and the <br /> deeper flow was S87T with a slope of 0 0011 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 an 180°reversal of groundwater direction for the <br /> 1 <br />