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• i • CAMBRIA Table 1 Additional Groundwater Analytical Data,Shell-branded Service Station,2575 Country Club Boulevard,Stockton,Cabfornta Sample Date Ethanol TBA DIPE ETBE TAME Methanol EDB Volatile Organics by EPA 8260 (µgll,) (AgtL) OWL) OWL) (AgfL) (118IL) (AY/L) (AgIL) 2456 CC 19-Oct-00 NA [100 <2 00 <2 00 c2 00 NA NA DIPE TAME TBA and ETBE were analyzed outside of EPA recommended hold tune 2456 CC 11-Jan-01 NA <200 <2 00 <2 00 <2 00 NA NA 2456 CC 12-Apr-01 NA <200 <2 00 <2 00 <2 00 NA NA Foster Well Down,2472 Country Club Boulevard 2472 CC 22-Dec 97 <500 <100 <2 0 <20 <2 0 <1 000 NA 2472 CC 29-San-98 <500 <100 <2 0 <20 <2 0 <1000 NA 2472 CC 23 Apr 98 <500 <100 <20 <20 <20 <1000 NA 2472 CC 29 Jul-98 <500 <100 <2 0 <20 <2 0 <1,000 NA 2472 CC 06-Oct-98 <500 <100 <2 0 <2 0 <2 0 <1000 NA 2472 CC 27-Jan-99 <500 <100 <20 <20 <20 <2,000 NA 2472 CC 15 Apr 99 <3 000 <200 <2 00 <2 00 <2 00 <1,000 NA 2472 CC 27 Jul 99 <1000 <200 <2 00 <2 00 <2 00 <1000 NA 2472 CC 28 Oct 99 <1,000 <200 <2 00 <2 00 <2 00 <1,o00 NA 2472 CC 28-Jan-t10 <1 000 <200 <2 00 <2 00 <2 00 <1,000 NA 2472 CC 18-Apr-00 <t 000 <100 <2 00 <2 00 <2 00 NA NA 2472 CC 28-Jn1-00 NA NA <100 <100 <100 NA <l 00 DIPE TAMETBA and ETBE were analyzed outside of EPA 2472 CC 19 Oct-00 NA <100 <2 00 <2 00 <2 00 NA NA recommended hold time 2472 CC 11-tan-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 Sanella Well Down,2468 Country Club Boulevard 2468 CC Down 05-Aug-97 <500 <100 <2 0 <2 0 <2 0 <1,000 NA Not detected except for Benzene 48 Chloromethane 4 8 1 1 � 2468 CC Down 29-Au <500 100 <20 <20 <20 14M NA Dichloroethane 5 3 Ethylbenzene 40 Naphthalene 5 3 Styrene g 97 < 3 1 Toluene 30 12 3-Tnmethylbenzene 4 2 and Total Xylenes 100 ppb 2468 CC Down 22 Dec-97 <500 <100 <20 <2 0 <2 0 <low NA 2468 CC Down 29-Jan 98 <500 <100 <20 <20 <20 <1000 NA 2468 CC Down 23-Apr-98 <500 <100 <20 <20 <20 <1000 NA 2468 CC Down 29-Jul-98 <1000 <200 <40 <4 0 <40 <1000 NA 2468 CC Down 06-Oct 96 <500 <100 <2 0 <2 0 <2 0 <1000 NA 2468 CC Down 27-Jan-99 <500 <100 <2 0 <20 <2 0 <2000 NA 2468 CC Dawn 15-Apr 99 <3000 <200 <2 00 <2 00 <200 <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 Q 00 <2 00 <low NA 2468 CC Down 18-Apr-00 <1000 <100 <2 00 <2 00 <2 00 NA NA 2468 CC Down 28-Jul-00 NA NA <1 00 <100 <1 00 NA <l 00 DIPS TAME,and EDB were analyzed outside of EPA recommended hold time 0783 Page 8 of 9