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Table l ' Groundwater Elevations and Sample Analytical Results Former E-Z Serve Location No 100878 1012 West Yosemite Avenue,Manteca,California Well Sampling TOC DTW GWE' PSH TPHg B T E X MTBE No Date (feet) (feet) (feet) (feet) (µg/L) (µg/1.) (µg2) (�gIL) _ (}Lg/L,) {µg/L} MW-6 2/5101 1114 1141 1451 010 <50 <0 5 <0 5 <0 5 <0 5 177 ' (Cont) 5/24/01 9804 1449 83 55 000 <50 <0 5 <0 5 <0 5 <0 5 2 11/8/015 9804 1647 8157 000 <50 <0 30 <0 30 <0 30 <0 60 2 1 ' MW-7 513/94 9760 15 95 8165 000 <100 <1 <1 <1 <1 -- 7/15/94 9760 1687 8073 000 1,300 35 29 48 250 9/27/94 9760 1903 7857 000 <100 <1 <1 <1 <1 12/8/94 9760 1667 8093 000 <50 <0 5 <0 5 <0 5 <0 5 ' 3/24/95 9760 1398 8362 000 <50 <0 5 <0 5 <0 5 <0 5 -- 6/22/95 9760 1595 8165 000 <50 <0 5 <0 5 <0 5 <0 5 9/15/95 9760 1846 79 14 000 <100 <1 <1 <1 <3 - ' 12/12/95 9760 1641 81 19 000 <100 <1 <1 <1 <3 -- 2122/96 9760 13 94 8366 000 <50 <0 5 <0 5 <0 5 <1 5 9/17196 9760 1667 8093 000 <50 < < < < < 12/10/96 9760 15 19 8241 000 110 21 79 13 10 < 4115/97 9760 1226 8534 000 <50 <0 5 <0 5 <0 5 <0 5 <0 5 6120/97 9760 13 10 8450 000 <50 <0 5 <0 5 <0 5 <0 5 < 11/21/97 9760 1441 83 19 000 -- -- -- -- -- -- 12/10/98 9760 11 26 8634 000 <50 <0 5 <0 5 <0 5 <0 5 <5 0 2/5/012 9760 1291 8469 000 <50 <0 5 <0 5 <0 5 <0 5 <0 5 5/24101 9760 1348 8412 000 -- -- -- -- -- -- 11/8/013 9760 1574 81 86 000 <50 <0 30 <0 30 <0 30 <0 60 <1 0 ' MW-8 513/94 9805 1655 8150 000 84 <1 <1 <1 <1 -- 7/15/94 -7/15194 9805 1751 8054 000 1,400 27 260 48 270 -- ' 9/27194 9805 1971 7834 000 <100 <1 <1 <1 <1 12/8/94 9805 1722 8083 000 <50 <0 5 <0 5 <0 5 07 3124/95 9805 1410 8395 000 <50 <0 5 <0 5 <0 5 <0 5 6/22/95 9805 1621 8184 000 <50 <0 5 <0 5 <0 5 <0 5 -- ' 9115/95 9805 1911 7894 000 <100 <1 12/112/95 9805 1708 8097 000 <100 <1 <1 <1 <3 2/22/96 9805 1459 8346 000 <50 <0 5 <0 5 <0 5 9/17/16 9101 1739 1166 0 00 <50 <0 5 <0 5 <0 5 <0 5 1 12/10/96 9805 1457 8348 000 100 23 84 14 11 06 4115197 9805 1281 8524 000 <50 <0 5 <0 5 <0 5 <0 5 -- 6120197 9805 1374 8431 000 <50 <05 <0 5 <0 5 <0 5 < ' 11/21/97 9805 1498 8307 000 -- -- -- -- -- -- 12/10/98 9805 11 81 8624 000 <50 <05 <0 5 <0 5 <0 5 <5 0 2/5/012 9805 1345 8460 000 <50 <0 5 <0 5 <0 5 <0 5 <0 5 5/24/01 9805 14 15 8390 000 -- -- -- -- -- 11/8/013 9805 1636 8169 000 <50 ' <0 30 <0 30 <0 30 <0 60 <1 0 Notes No known groundwater monitoring or sampling was conducted between December 10, 1998 and ' February 5,2001 TOC =Top of casing referenced to an arbitrary benchmark,in feet DTW =Depth to water measured from the top of casing GWE =Groundwater elevation as referenced to benchmark,in feet ' ' PSH =Phase Separate Hydrocarbons thickness,3n feet € TPHg =Total Petroleum Hydrocarbons as gasoline(EPA Method 8015) B =Benzene(EPA Method 8020 or 8021) T =Toluene(EPA Method 8020 or 8021) ' I E. =Ethylbenzene(EPA Method 8020 or'8021) I ' X =Total Xylenes(EPA Method 8020 or 8021) I € I MTBE =Methyl-test Butyl Ether(EPA Method 8020,8021,or`8260) l' µg/L =Micrograms per liter(—ppb) < =Sample reported as"not detected,"in previous tables,reporting limit not known I I ' E Page 44 5 k