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TABLE 2 CHEMICAL ANALYSIS - GROUNDWATER Diesel Performance Stockton, California (Page 6 of 6) Sample ID Date MTBE B T E X TPHg TPHk TPHd ug/l ugll ug/I ug/l ug/I u9/1 ug/1 ug/I MW7 12/12/01 <2 0141 <05 <0 5 <0 5 <1 0 <50 <50 <50 10/25/02 <2 0141 <0 5 <0 5 <0 5 <1 0 <50 <50 <50 01/23/03 <2 OW <0 5 <0 5 <0 5 <1 0 <50 <50 <50 04/07/03 <2 01" <05 <0 5 <05 <1 0 <50 <50 <50 07/09/03 <2 0141 <05 <0 5 <0 5 <1 0 <50 <50 <50 10/20/03 <2 0141 <05 <0 5 <05 <1 0 <50 <50 <50 01/13/04 <2 0541 <0 5 <0 5 <05 <1 0 <50 <50 <50 04/07/04 <2 0141 <05 <05 <05 <1 0 <50 <50 <50 07/08/04 <0 6141 <0 5 <0 5 <0 5 <1 0 <50 <50 <50 10/06/04 <0 5`41 <0 5 <0 5 <0 5 <1 0 <50 <50 <50 CPT1 12/13/01 <2 0i41 <0 5 <0 5 <0 5 <1 0 <60 <50 1 <60 MCLs NA 130 1 0 150 700 1,750 NE NE NE NOTES ugll = Micrograms per liter = Parts per Billion (ppb) MTBE = Methyl Tertiary Butyl Ether by EPA Method 82£0 or 82608 B = Benzene by EPA Method 8020 or 8021 B T = Toluene by EPA Method 8020 or 8021 B E = Ethylbenzene by EPA Method 8020 or 8021 B X = Xylenes by EPA Method 8020 or 8021 B TPHg = Total Petroleum Hydrocarbons as Gasoline by EPA Method 8015 or 80158 TPHk = Total Petroleum Hydrocarbons as Kerosene EPA Method 8015 or 8015B TPHd = Total Petroleum Hydrocarbons as Diesel by EPA Method 8015 or 8015B NE = None Established NA = Not Analyzed for that constituent < — Not Detected at or Above Stated Method Detection Limit 1 — Sample analyzed by 8260 for fuel oxygenates including Ethanol t-Butanol, Di-Isopropyl Ether Ethyl t-Butyl Ether and t-Amyl Methyl Ether These fuel oyxgenates were below method detection limits 2 — Unidentified hydrocarbon see laboratory report 3 — Overlapping chromatogram patterns, see laboratory report 4 _ Sample analyzed by 826013 for fuel oxygenates including t Butanol Di-Isopropyl Ether, Ethyl t-Butyl Ether t Amyl Methyl Ether 1 2 Dichloroethane and 2-Dibromoethane These fuel oyxgenates were below method detection limits S 1625771TABLESlwat-TABL DOC