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1 <br /> G <br /> eo(9g icat Technks Ptc. <br /> r1 101 7"'Street <br /> Modesto California 95354 <br /> (209)522-4119/Fax(209)5224227 <br /> r <br /> REPORT <br /> Groundwater Monitoring <br /> 2"d Quarter 2003 <br /> George's Service <br /> 1600 Durham Ferry Road <br /> ' Tracy, California <br /> Project No 425 2 <br /> rJune 25, 2003 <br /> EXECUTIVE SUMMARY <br /> This report summarizes the 2"d Quarter 2003 groundwater monitoring and testing event that <br /> was completed on June 6, 2003 The water table gradient for this monitoring event was <br /> 0 0012 ft/ft flowing N07°E Depth to groundwater, in the water table wells, at the site <br /> ranged between 12 44 and 13 58 feet below ground surface (bgs) for the event The <br /> groundwater gradient in the site's intermediate wells was 0 0018 ft/ft flowing N70°E These <br /> ' data are consistent with past events <br /> The analytical results from the June 2003, monitoring event show that aromatic <br /> ' hydrocarbon compounds (BTEX) and gasoline range petroleum hydrocarbons (TPH-G) are <br /> present in 4 of the 9 monitoring wells sampled during this event (MW-1, MW-2, MW-4 and <br /> MW-5) Three domestic water wells in the immediate area of the former tanks were tested <br /> ' and none of the wells contained contaminant concentrations above the laboratory detection <br /> limits <br /> ' A summary of groundwater analytical findings includes <br /> i TPH-G contaminant concentrations exhibited a stable trend in well MW-1 and MW- <br /> ' 4 <br /> TPH-G concentrations in MW-2 and MW-5 have shown an increasing trend over the <br /> . history of the site <br /> 1 <br />