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I Table 1 Page 2 of 2 2000-2003 Quarterly Groundwater Sample Results ' ARCO Station#434 . 501 West Kettleman Lane, Lodi, California Ethyl- Xylenes Well Date TPHg Benzene Toluene benzene (total) MtBE O&G Number Sampled (ug/L) (ug/L) (ug/L) (ug/L) (lug/L) (ug/L) (mg/L) ' W-3 1/21/2000 <50 <0 5 <0 5 <0 5 <0 5 <2 -- 4/28/2000 <50 <0 5 <0 5 <0 5 <0 5 <2 5' 9/5/2000 <50 <0 5 <0 5 <0 5 <0 5 <2 - ' 12/15/2000 <50 <0 5 <0 5 <0 5 <0 5 <25 3/15/2001 <50 <0 5 <0 5 <0 5 <0 5 <2' 5/11/2001 <50 <0 5 <0 5 <0 5 <0 5 <2' — 9/12/2001 <50 <0 5 <0 5 <0 5 <0 5 <2" -- ' 12/14/2001 <50 <05 <0 5 <0 5 <0 5 <0 F == 3/11/2002 <50 <05 <0 5 <0 5 <0 5 <0 5' 6/20/2002 <50 <0 5 <0 5 <0 5 <0 5 <0 5 -- 3/31/2003 <50 <05 <0 5 <0 5 <05 <0 5 6/11/2003 <50 <0 5 <0 5 <0 5 <05 <0 5 W-9 1/21/2000 <50 <0 5 <0 5 <0 5 <05 6 - 1 4/28/2000 <50 <0 5 <0 5 <0 5 <0 5 <2 5" -- 9/5/2000 113 <0 5 <0 5 <0 5 7 <2 430 11/1/2000 <50 <0 5 <0 5 <0 5 <0 5 <2 5 <5(a) 12/15/2000 <50 <0 5 <0 5 <0 5 <0 5 <2 5 8 ' 3/15/2001 <50 <05 <0 5 <0 5 <0 5 <2' <5 I 5/11/2001 <50 <05 <0 5 <0 5 <0 5 <2" <5 9/12/2001 <50 <0 5 <0 5 <0 5 <0 5 <2" <5 12/14/2001 <50 <0 5 <0 5 <0 5 <0 5 <0 5" <5 3/11/2002 <50 <0 5 <0 5 <0 5 <0 5 <0 5' <5 6/20/2002 <50 <0 5 <0 5 <0 5 <0 5 <0 5 <5 3/31/2003 <50 <0 5 <05 <05 <0 5 <0 5 -- 6/1112003 <50 <05 <0 5 <05 <0 5 <0 5 i Trip 5/11/2001 <50 <0 5 <0 5 <0 5 <0 5 <2 -- Blank 9/12/2001 <50 <0 5 <05 <0 5 <0 5 12/14/2001 <50 <0 5 <0 5 <0 5 <0 5 3/11/2002 <50 <0 5 <0 5 <0 5 <0 5 -- 6/20/2002 -- - -- -- -- -- -- ' dotes TPHg=Total petroleum hydrocarbons as gasoline MtBE=Methyl tert-butyl ether O&G=Oil&grease ug/L=micrograms per liter mg/L=milligrams per liter =analyzed using EPA Method 8260 <=below given laboratory detection limit -=not measured or analyzed (a)=sample analyzed for total lead using EPA Method 6010 and chlorinated hydrocarbons using EPA Method 624, ' analytes reported as nondetectable 1 • ' K\J5 RP ARC01D0434\0uariedy\1 QTR 03"34 GW MR 1003 As