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CAMBRIA Table 1 Additional Groundwater Analytical Data,Shell-branded Service Station,2575 Country Club Boulevard,Stockton,Califorma Sample Date Ethanol TBA DIPE ETBE TAME Methanol EDB Volatile Organics by EPA 8260 (µSQ-) (agIL) (A91L) (R/L) WIL) (AgIL) (lrPIL) (ILVL) 2468 CC Down 12 Apr-01 NA <200 <2 00 <2 00 <2 00 NA NA Sanella Well Part,2468 Country Club Boulevard 2468 CC Port 05-Aug-97 <500 <100 <2 0 <2 0 <2 0 <1000 NA 2468 CC Port 29-Aug-97 <500 <100 <20 <20 <2 0 <I,000 NA Not detected except Total Xylenes 3 3 ppb 2468 CC Port 02-Dec 97 <500 <100 <2 0 <20 <2 0 <1000 NA 2468 CC Port 22 Dec-97 <500 <100 <2 0 <20 <2 0 <1000 NA 2468 CC Port 29 Jan 98 <500 <100 <20 <20 <20 <1,000 NA 2468 CC Port 23 Apr-98 <500 <100 <20 <20 <20 <1,000 NA 2468 CC Port 29-Jul-98 <500 <100 <20 <20 <20 <1000 NA 2468 CC Port 06.0ct-98 <500 <100 <20 <2 0 <20 <1,000 NA 2468 CC Port 27-Jan-99 <500 <100 <2 0 <2 0 <20 <2,000 NA 2468 CC Port 15-Apr-99 <3,000 <200 <2 00 <2 00 <2 00 <1000 NA 2468 CC Port 27 Jul 99 <1 000 <200 <2 00 <2 00 <2 00 <1 000 NA 2468 CC Part 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 <l 00 <1 00 <100 NA <100 2468 CC Port 19-oct-00 NA <100 <2 00 <2 00 <2 00 NA NA DIPE TAME TBA and ETRE were analyzed outside of EPA recommended hold time 2,468 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 lmut x (DUP)=Duplicate sample Ethanol tertiary butyl alcohol(PBA),Di isopropyl ether(DTPE) Ethyl ternary butyl ether(ETBE) tertiary amyl methyl ether(TAME) and Ethylene dibomude(EDB)analyzed by EPA Method 8260 Methanol analyzed by EPA Method 8015 Modified 0783 Page 9 of 9