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_7u 1. 11 '90 17: 12 0001 DAMES Q- 00RE/FPESNO TEL -222-1937 PRGF, 04/16 <br /> Chevron U.S.A. - Page 3 <br /> and total petroleum hydrocarbons as referenced to gasoline <br /> (EPA method - 8020) . Saimples were composited by the <br /> analytical laboratory prior to chemical analysis. <br /> The soil samples mere obtained from varying depths and <br /> locations in the soil aeration pile at the subject property. <br /> The results of these analyses have been summarized on Table <br /> 2, as follows: <br /> TABLE x <br /> Concentration of Petroleum <br /> (Concentrations expressed in parts per million <br /> Sample Sample <br /> 1 .D Type Benzene Toluene Xylenes Ethylbgnz. T'PH <br /> C-1 (ABC) CO n/d n/d n/d n/d n/d <br /> C-2 (ABC) CO n/d n/d n/d n/d n/d <br /> C-3 (ABC) CO n/d n/d n/d n/d n/d <br /> C-4 (ABC) CO <0. 5 <0.5 <0. 5 <0.5 180 <br /> C-5 (ABC) CO <0. 02 <0. 02 <0.02 <0.02 17 <br /> C-6(ABC) Co n/d n/d n/d n/d n/d <br /> C-7 (ABC) CO n/d n/d n/d n/d n/d <br /> C-8 (ABC) CO <0 . 05 0.33 0. 196 1.21 99 <br /> C-9 (ABC) CO n/d n/d n/d n/d n/d <br /> C-10(ABC) CO n/d n/d n/d n/d n/d <br /> C-11 (ABC) CO n/d n/d n/d n/d n/d <br /> C-12 (ABC) CO n/d n/d n/d n/d 2 .1 <br /> Detection <br /> limits 0.005 0. 005 0.005 0.005 1. 0 <br /> Legend: <br /> n/d - non-detected sthylbenz. - Ethylbenzene TPH - Total <br /> Petroleum Hydrocarbons < - Less than, but above Detection <br /> Limit CO - Composite <br /> DAMES & MOORE <br />