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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 (l{gIL) (ug[ ) (Ag/L) (Fid) (Ftp) (11g L) (lam-) (Ag L) 2472 CC 28-Oct-99 <1000 <200 <2 00 <2 00 <2 00 <1000 NA 2472 CC 28-Jan 00 <1000 <200 <2 00 <2 00 <2 00 <1000 NA 2472 CC 18-Apr-00 <1000 <100 <2 00 <2 00 <2 00 NA NA 2472 CC 28-Jul-00 NA NA <1 00 <1 00 <l 00 NA <1 00 2472 CC 19-Oct 00 NA <100 <2 00 Q 00 <2 00 NA NA DIPS,TAME,TBA,and ETBE were analyzed outside of EPA recommended hold time 2472 CC 11 Jan 01 NA <200 <2 00 <2 00 <2 00 NA NA 2472 CC 12 Apr-01 NA <200 <2 00 <2 00 <2 00 NA NA 2472 CC 27 Jul-01 NA <50 <2 0 <2 0 <20 NA NA Sanella Well Down,2468 Country Club Boulevard 2468 CC Down 05-Aug-97 <500 <100 <2 0 <2 0 <2 0 <1000 NA Not detected except for Benzene 48 Chloromethane 4 8 11- 2468 CC Down 29-Aug 97 <500 <100 <2 0 <2 0 d 0 1400 NA Dichloroethane 5 3,Ethylbenzene 40 Naphthalene 5 3 Styrene 3 1,Toluene 30 1 2,3-Tnmethylbenzene 4 2 and Total Xylenes 100 ppb 2468 CC Down 22-Dec-97 <500 <100 <2 0 <2 0 <2 0 <1000 NA 2468 CC Down 29-Jan 98 <500 <100 <2 0 <2 0 <2 0 <1000 NA 2468 CC Down 23-Apr-98 <500 <100 <2 0 <2 0 <2 0 <1000 NA 2468 CC Down 29 Jul-98 <1000 <200 <4 0 <4 0 <4 0 <1000 NA 2468 CC Down 06-Oct 98 <500 <]00 <2 0 <2 0 <2 0 <1000 NA 2468 CC Down 27-Jan 99 <500 <100 <2 0 <2 0 <2 0 <2000 NA 2468 CC Down 15 Apr 99 <3000 <200 <2 00 <2 00 <2 00 <1000 NA 2468 CC Down 27-Jul 99 <1000 <200 <2 00 <2 00 <2 00 <1000 NA 2468 CC Down 28 Oct 99 <1000 <200 <2 00 <2 00 <2 00 <1000 NA 2468 CC Down 28-Jan-00 <1000 <200 <2 00 <2 00 <2 00 <I000 NA 2468 CC Down 18-Apr 00 <1000 <100 <2 00 Q 00 <2 00 NA NA 2468 CC Down 28 Jul-00 NA NA <1 00 <1 00 <1 00 NA <1 00 DIPS,TAME,and EPB were analyzed outside of EPA recommended hold ume 2468 CC Down 19-Oct 00 NA <100 <2 00 <2 00 <2 00 NA NA DtPE TAME,TBA,and ETBE were analyzed outside of EPA recommended hold time 2468 CC Down 11 Jan 01 NA <200 <2 00 <2 00 <2 00 NA NA 2468 CC Down 12 Apr-01 NA <200 <2 00 <2 00 <2 00 NA NA 2468 CC Down 27-Jul 01 NA <50 <20 <20 <2 0 NA NA Sanaa Well Port,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 <2 0 Q 0 <2 0 <1000 NA Not detected except Total Xylenes 3 3 ppb 0783 Page 9 of 10