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Table 1 <br /> Groundwater Elevations and Sample Analytical Results <br /> Former E-Z Serve Location No 100878 <br /> 1012 West Yosemite Avenue,Manteca,California <br /> Well Sampling TOC DTW GWE' PSH TPHg B T E X MTBE <br /> No Date (feet) (feet) (feet) (feet) (µ ) µ (µ /L) (µ ) (µ ) ( ) <br /> MW-8 1/31/02 3125 1381 1744 000 <500 <0 5 <0 5 <0 5 <0 5 <1 <br /> (Cont) 5/2/02 3125 1420 17 05 000 <500 <0 50 <0 50 <0 50 <1 5 <1 0 <br /> i <br /> Notes No known groundwater monitoring or sampling was conducted between December 10, 1998 and <br /> February 5,2001 <br /> TOC =Top of casing referenced to USGS Benchmark HSo208 [elevation=38 20 feet above mean sea level] <br /> DTW =Depth to water measured from the top of casing <br /> GWE =Groundwater elevation as referenced to benchmark in feet above mean sea level <br /> ' PSH =Phase Separate Hydrocarbons thickness <br /> TPHg =Total Petroleum Hydrocarbons as gasoline(EPA Method 8015) <br /> B =Benzene(EPA Method 8020 or 8021) <br /> T =Toluene(EPA Method 8020 or 802 1) <br /> E =Ethylberizene(EPA Method 8020 or 802 1) <br /> X =Total Xylenes(EPA Method 8020 or 8021) <br /> MTBE =Methyl-tert Butyl Ether(EPA Method 8020,8021,or 8260) <br /> µg/L =Micrograms per liter(parts per billion) <br /> < =Sample reported as not detected in previous tables,reporting limit not known <br /> M'=No-purge sample collected <br /> ' =If ASH present,corrected GWE=TOC-Measured DTW+Corrected PSH <br /> Thickness(PSH Thickness x gas density[0 751} <br /> s =All analysis by EPA Method 8260 <br /> a =All analysis by EPA Method 8260 on January 31,2002 and thereafter <br /> MTBE analysis by EPA Method 8260B <br /> =Not measured,sampled,or analyzed <br /> III <br /> I I <br /> It I <br /> I <br /> I <br /> I ' I <br /> I ' I <br /> I , I <br /> I <br /> I <br /> l <br /> I <br /> I I I I k I I I I I <br /> 1 I I I II I I I I II I I 1 1 I � I <br /> I I 1 <br /> I i <br /> I ,II EIq <br /> I'I' I II I I I II { I ll I' II III I I"I I I PageI5of5Y <br /> I I <br />