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16 <br /> qeotogkot 7rect" cs I/W. <br /> ' 1101 V"Street <br /> Modesto,California 95354 <br /> (209)522-4119/Fax(209)522-4227 <br /> 1 <br /> ' REPORT <br /> Groundwater Monitoring <br /> 2"d Quarter 2005 <br /> ' George's Service <br /> 1500 Durham Ferry Road <br /> Tracy, California <br /> ' Project No 425 2 <br /> May 10, 2005 <br /> EXECUTIVE SUMMARY <br /> This report summarizes the 2"d Quarter 2005 groundwater monitoring and sampling event <br /> ' that was completed on April 11, 2005 <br /> The four zones at the site showed the following general characteristics <br /> ' 1 Zone A wells--the water table wells with screen intervals from 5 to 22-feet bgs, have <br /> a gradient of 0 0009 ft/ft flowing N24°E <br /> 2 Zone B wells - screened from 32 to 35-feet bgs, have a groundwater gradient of <br /> 0 0112 ft/ft flowing N 1$°W <br /> 3 Zones C & D - do not have three wells spaced properly to allow for gradient <br /> calculations, so site-specific groundwater gradients and bearings could not be <br /> ' calculated for these two horizons <br /> 4 The vertical component of groundwater flow is predominantly in the upward <br /> ' direction <br /> The analytical results from the April 2005 monitoring event show that MTBE and/or TPH-G <br /> ' and BTEX constituents are present in 6 monitoring wells (MW-1, MW-2, MW-4, MW-5, <br /> MW-8 and MW-106) The three domestic wells sampled during this event did not contain <br /> petroleum hydrocarbon contaminants above laboratory reporting limits <br /> 1 <br /> 1 <br />