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CAMBRIA Table 1 Additional Groundwater Analytical Data,Shell-branded Service Station,2575 Country Club Boulevard,Stockton,California Sample Date Ethanol TBA DIPE ETBE TAME Methanol EDB Volatile Organics by EPA 8260 (KgIL) WIL) (991L) WIL) (1191-) WIL) (1192) (l+PI-) 2468 CC Down 12 Apr-01 NA <200 <2 00 <2 00 <2 00 NA NA 5anella Well Port,2468 Country Club Boulevard 2468 CC Port 05-Aug-97 <500 <100 <2 0 <20 <20 <1,000 NA 2468 CC Port 29-Aug-97 <500 <100 <2 0 <20 <20 <1000 NA Not detected except Total Xylenes 3 3 ppb 2468 CC Port 02-Dec 97 <500 <100 <2 0 <20 <2 0 <1,000 NA 2468 CC Port 22-Dec 97 <500 400 <2 0 <20 <20 <1,000 NA 2468 CC Port 29-Ju-98 600 <100 <2 0 <20 <20 <1000 NA 2468 CC Port 23-Apr-98 600 <100 <20 <20 <20 <1000 NA 1468 CC Port 29-Jul-98 <500 <100 <20 <20 <20 <1,000 NA 2468 CC Port 06-Oct 98 <500 <100 <20 <20 <20 <11000 NA 2468 CC Port 27 Jan-99 <500 <100 <20 <20 <20 <2,000 NA 2468 CC Port 15 Apr 99 <3 000 <200 <2 00 <2 00 <2 00 4,000 NA 2468 CC Port 27-Jul-99 <1,000 <200 <2 00 <2 00 <2 00 <1000 NA 2468 CC Port 28-Oct 99 <1 000 <200 <2 00 <2 00 <2 00 <1 000 NA 2468 CC Port 28 Jan-00 <1 000 <200 <2 00 <2 00 <2 00 <1,000 NA 2468 CC Port 18 Apr-00 <1 000 <100 <2 00 <2 00 <2 00 NA NA 2468 CC Port 28-Jul-00 NA NA <1 00 <100 <l 00 NA <100 2468 CC Port 19-oct-00 NA <100 <2 00 <2 00 <2 00 NA NA DIPE TAME TBA and ETBE were analyzed outside of EPA recommended hold time 2468 CC Port 11-Jan-01 NA <200 <2 00 <2 00 <2 00 NA NA 2468 CC Port 12-Apr-01 NA <200 <2 00 <2 00 <2 00 NA NA Abbreviations and Notes NA=Not analyzed or not available <x=Not detected at detection tint x (DUP)=Duplicate sample Ethanol tertiary butyl alcohol(TBA) Di isopropyl ether(DIPE) Ethyl tertiary butyl ether(ETR&),tertiary amyl methyl ether(TAME) and Ethylene dibormide(EDB)analyzed by EPA Method 8260 Methanol analyzed by EPA Method 8015 Modified 0783 Page 9 of 9