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` �`■ KLEINFELDER <br /> 4 ANALYTICAL RESULTS <br /> A total of 15 soil samples were collected from the five soil borings. Nine of the 15 soil <br /> samples were submitted for chemical analysis. The soil samples were selected for analysis <br /> based on their position in the boring, field observations, and organic vapor readings. <br /> The samples were submitted under chain-of-custody to Superior Precision Analytical, Inc. <br /> (Superior) in San Francisco, via a courier service. Superior is certified by the State of <br /> California Toxic Substance Control to perform the requested analyses. The nine soil samples <br /> were analyzed for total petroleum hydrocarbons (TPH) purgeable by Method 5030 GC-FID; <br /> benzene, toluene, ethylbenzene and xylenes (BTEX) by EPA Method 8020, and TPH <br /> extractable by Method 3550 GC-FID. <br /> Petroleum hydrocarbons (TPH and BTEX) were not detected in the seven samples analyzed <br /> from borings B-1 through B-4. TPH as gasoline and diesel, and some BTEX constituents were <br /> detected in the two samples analyzed from boring B-5 as follows: <br /> Depth TPH-Diesel TPH-Gasoline Benzene Toluene Ethylbenzene Xylenes <br /> Sample Boring feet (mg/kg) (me/ke) (mg/kg) (mg/kg) (m¢/ke) (mg/kg) <br /> 63698 1, - 20.5 740 97 ND .20 ND .89 <br /> 63699 4 25.5 690 35 .008 .17 ND 1.4 <br /> The laboratory data sheets and chain-of-custody form are presented in Appendix D. <br /> UI <br /> FR8-92-211 Page 6 of 8 <br /> Copyright 1992 Kleinfelder, Inc. <br />