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i CAMBRIA Table 1 Additional Groundwater Analytical Data,Shell-branded Service Station,2575 Country Club Boulevard,Stockton,California Sample Date DIPE ETBE TAME TBA Methanol Ethanol EDB Volatile Organics by EPA 8260 (J1gB-) (µg/-) (Ag/-) (lig/-) (Ng/L) (Iigd-) (Ng/-) (pg/-) Cal Trans 27-Jul-99 <2 00 <2 00 <2 00 <200 <1,000 <1,000 NA Cal Trans 28-Qct-99 <2 00 <2 00 <2 00 <200 <l 000 <l 000 NA Cal Trans 28-Jan-00 <2 00 <2 00 <2 00 <200 <1 000 <l 000 NA Cal Trans I8-Apr 00 <2 00 <2 00 <2 00 <100 NA <1,000 NA Cal Trans 28-Jul 00 <l 00 <1 00 <l 00 NA NA NA <1 00 DIPE TAME and EDB were analyzed outside of EPA recommended hold time Cal Trans 19 Oct-00 <66 7 <66 7 <66 7 <3 330 NA NA NA DIPE TAME TBA and ETBE were analyzed outside of EPA recommended hold time Cal Trans 1 1-Jan 01 <2 00 <2 00 <2 00 <200 NA NA NA Cal Trans 12 Apr-O 1 <2 00 <2 00 <2 00 <200 NA NA NA Boardman Well Port,2452 Country Club Boulevard 2452 CC Port 05-Sep-97 <2 0 <2 0 <2 0 <100 <1 000 <500 NA Not detected 2452 CC Port 22-Dec 97 <2 0 <2 0 <2 0 <100 <1,000 <500 NA 2452 CC Port 29 Jan-98 <2 0 <2 0 <2 0 <100 <1 000 <500 NA 2452 CC Port 23 Apr 98 <2 0 <2 0 <2 0 <100 <l 000 X500 NA 2452 CC Port 29-Jut-98 <2 0 <20 <2 0 <100 <1 000 <500 NA 2452 CC Port 06 Oct-98 <2 0 <2 0 <2 0 <100 <1 000 <500 NA 2452 CC Port 27 Jan 99 <2 0 <2 0 <2 0 <100 <2 000 <500 NA 2452 CC Port 15 Apr-99 <2 00 <2 00 <2 00 <200 <l 000 <3 000 NA 2452 CC Port 27 Jul-99 <2 00 <2 00 <2 00 <200 <l 000 <1 000 NA 2452 CC Port 28 Oct 99 <2 00 <2 00 <2 00 <200 <1 000 <1 000 NA 2452 CC Port 28 Jan-00 <2 00 <2 00 <2 00 <200 <1 000 <1 000 NA 2452 CC Port 18-Apr 00 <2 00 <2 00 <2 00 <100 NA <1 000 NA 2452 CC Port 28 Jul 00 <1 00 <1 00 <1 00 NA NA NA <1 00 2452 CC Port 19 Oct-00 <2 00 <2 00 <2 00 <100 NA NA NA D1PE TAME TBA and ETBE were analyzed outside of EPA recommended hold time 2452 CC Port I 1-Jan 01 <2 00 <2 00 <2 00 <200 NA NA NA 2452 CC Port 12-Apr-Ol <2 00 <2 00 <2 00 <200 NA NA NA Boardman Well Down,2452 Country Club Boulevard 2452 CC Down 22 Dec-97 <2 0 <2 0 <20 <100 <1 000 <500 NA 2452 CC Down 29 Jan 98 <2 0 <2 0 <20 <100 <1 000 <500 NA 2452 CC Down 23 Apr 98 <2 0 <2 0 <2 0 <100 <1 000 <500 NA 2452 CC Down 29 Jul-98 <2 0 <2 0 <2 0 <100 <1 000 <500 NA 2452 CC Down 06-Oct 98 <2 0 <2 0 <2 0 <100 <1 000 <500 NA 2452 CC Down 27-Jan 99 <2 0 <2 0 <2 0 <l00 <2 000 <500 NA 0783 Page 7 of l I