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i i • CAMBRIA Table 1 Additional Groundwater Analytical Data,She]]-branded Service Station,2575 Country Club Boulevard,Stockton,California I Sample Date Ethanol TBA DIPS ETBE TAME Methanol EDB Volatile Organics by EPA 8260 (ug11-) (ugtl-) (u$/!-) (AWL) (ug11-) (µg11-) (1!$11-) (µg11-) MW 14 27 Jul-99 <1000 <200 <2 00 <2 00 <2 00 <1000 NA MW 14 28 Oct 99 <1000 <200 <200 <200 <200 <1000 NA RW IA 02 Sep 97 <1000000 0200000 <4000 <4000 <4000 280000 NA Not detected except Benzene 13000 Toluene 15000 and TotalXylenes 9400 ppb RW IA 02 Dec 97 <500000 <l00000 <2000 <2000 <2000 82000 NA RW-1A 29 Jan 98 <12000W <250000 <5000 <5000 <5000 100000 NA RW IA 23-Apr 98 <5000 <1000 02.0 <20 5300 110000 NA RW lA 29-Jul-98 <1250000 <250000 <5000 <5000 <5000 110000 NA RW-lA 06-Oct-98 <1000000 <200000 <4000 <40W 4300 98000 NA RW lA 27 Jan 99 <2500000 <500000 <10" <10000 <IWW 180000 NA RW]A 15-Apr-99 <3000000 <200000 02000 <2000 2200 49000 NA RWAA 27 Jul 99 <1250000 <250000 <2500 <2500 4040 15200 NA RW IA 28 Oct-99 <1250000 <250000 <2500 <2500 2830 <10000 NA RWAA 28-Jan-00 <714000 <143000 <1430 <1430 2370 <10" NA RW-IA 18 Apr-00 <1000000 <100000 02000 02000 3110 <20000 NA RWAA 28 Jul-00 NA NA <10000 <10000 <10000 <20000 <10000 DIPS TAME and EDB were analyzed outside of EPA recommended hold time RW IA 19-Oct-00 NA <62500 <1250 <1250 <1250 <101000 NA DIPE TAME TBA and ETBE were analyzed outside of EPA recommended hold time RW-lA I1-Jan 01 NA <20" <200 <200 1520 <5 00 NA RW-lA 12-Apr 01 NA <10000 <100 <100 1730 <20000 NA RW-1A 30 Oct-01 NA 14000 <200 <200 1300 <350,000 NA RW-lA(7UP) 02 Sep 97 <1250000 <250000 <5000 <5000 <5000 240000 NA Not detected except Benzene 14000 Toluene 18000 and Total Xylenes 13000 ppb RW-IA(DUP) 02 Dec-97 <620000 <120000 <2500 <2500 <2500 77000 NA Cal Trans Well Down,Country Club @ Plymouth Cal Trans 05 Sep-97 <500 <100 <2 0 <2 0 <20 <1000 NA Not detected except for Toluene 190 ppb Cal Trans 02 Dec 97 <500 <100 <20 <2 0 <2 0 <1000 NA Cal Trans 29 Jan 98 <500 <100 <2 0 02 0 <2 0 <1000 NA Cal Trans 23 Apr 98 <500 <100 <20 <20 <2 0 <1000 NA Cal Trans 29 Jul 98 <500 <100 <20 <20 <2 0 <1000 NA Cal Trans 06-Oct 98 <500 <100 <2 0 <2 0 <20 <1000 NA Cal Trans 27 Jan-99 <500 <100 <2 0 <2 0 <20 <2000 NA Cal Trans 15 Apr 99 <3000 <200 02 00 <2 00 <2 00 <1000 NA Cal Trans 27-Jul 99 <1000 <200 <2 00 <2 00 <2 00 <1001) NA Cal Trans 28-Oct 99 <1000 <200 <2 00 <2 00 <2 00 <1000 NA Cal Trans 28-Jan 00 <1000 <200 <2 00 <2 00 <2 00 <1000 NA Cil Trans 18-Apr-00 <1000 <100 <2 00 <2 00 <2 00 NA NA 0783 Page 5 of 9