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Table 2 Historical Analytical Results Summary for Groundwatert Il Chevron-Historical Pipeline Portfolio Porn bo Property-1755 West 11th Street. Tracy,California Concentrations in micrograms per liter(pg/L) Ethyl- Sample ID Date TPHg TPHd TPHdsg Benzene Toluene benzene Xylenes MtBE PAHs' GMX-6-GGW 9/22/1999 NA NA NA <0.5 <0.5 <0.5 <0.5 <1 Flr 0,2 Phn 03 GMX-25-GGW 5/16/2000 <50 86 <50 <0.5 <0.5 <0.5 <0.5 NA <0.1 6M6-29-GGW 10/12/2000 140 660/3603 160 0.6 16 1.6 4 NA Fir 0.1 Phn 0.1 GMX-30-GGW 10/12/2000 <50 300 <50 <0.5 0.8 <0.5 1.1 NA <0.1 GMX-3I-GGW 10/12/2000 <50 560 _ <50 <0.5 <0.5 <0.5 1.9 NA <0.1 GMX-33-GGW 10/13/2000 <50 140 <50 <0.5 <0.5 <0.5 <0.5 NA <0.1 Abbreviations: <=Analyte not detected above the laboratory reporting limit shown MtBE=methyl tert-butyl ether NA=Not analyzed PAHs=Polynuclear aromatic hydrocarbons TPHc=Total petroleum hydrocarbons quantified as crude oil(C 10-C36) TPHd=Total petroleum hydrocarbons quantified as diesel(CIO-C24) TPHdsg=Total petroleum hydrocarbons quantified as diesel with a silica gel preparation poreedure TPHg=Total petroleum hydrocarbons quantified as gasoline(C6-C12) ' Notes: Detected concentrations are noted in bold face type. I. Samples were collected by Geomatrix Consultants,Inc.and analyzed by Friedman and Bnrya,Inc.for TPHg,TPHd,and TPHc by EPA Method 8015 modified;for benzene,toluene,ethylbenzene,and total xylenes(BTEX)and MtBE by EPA Method 802613; and for PAH by EPA Method 8270C SIM. 2. Only Detected PAHs are shown: Flr=Fluorene and Phn=Phenanthrene 3. Unliltered/filtered sample result. The filtered sample was passed through a 0.7 micron glass fiber filter by the laboratory prior to extraction and analysis. Source: Geomatrix,2000. Report of Additional Sod and Groundwater Investigation,Pombo Property,Tracy,California,December.