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•f C70010gccal Technics t1tc. <br /> 1101 71,street <br /> Modesto,California 95354 <br /> (209)522-4119/Fax(209)522-4 22 7 <br /> I� <br /> REPORT <br /> Groundwater Monitoring <br /> 1" Quarter 2003 <br /> ' George's Service <br /> 1600 Durham Ferry Road <br /> Tracy, California <br /> Project No 425 2 <br /> May 12, 2003 <br /> EXECUTIVE SUMMARY <br /> ! This report summarizes the 15` Quarter 2003 groundwater monitoring and testing event that <br /> was completed on March 21, 2003 The water table gradient for this monitoring event was <br /> 0 0021 ft/ft flowing N851E Depth to groundwater, in the water table wells, at the site ranged <br /> between 12 13 and 13 29 feet below ground surface (bgs) fol the event The groundwater <br /> gradient in the site's intermediate wells was 0 0014 ft/ft flowing N38°E These data are <br /> consistent with past events <br /> I!� The analytical results from the March 21, 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 /> O TPH-G contaminant concentrations exhibited a decreasing trend in well MW-2 since <br /> the June 2001 event (seven events), increasing slightly duiing the September 2002 <br /> and March 2003 monitoiing events <br /> I� <br />