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DIVERSIFIED ANALYTICAL SERVICES <br /> Environmental Laboratory <br /> LABORATORY40 REPORT <br /> Reference: California Geophysical Group - Soil Samples Collect on <br /> 3/30 - 31/92 From Exxon Charter Way in Stockton <br /> Test Methods: EPA Method 8020 for Volatile Aromatics (BTXE) <br /> EPA Method 6010 for Lead <br /> Modified EPA Method 8015 for TPH as Gasoline <br /> Date Received: April 3, 1992 <br /> Date Analyzed: April 6 - 141 1992 <br /> Date Reported: April 17, 1992 <br /> Note: See attached documents for further information. <br />' A N A L Y T I C A L F E S U L T S <br /> All Results in ppb (ug/kg) Unless Otherwise Specified <br /> Constituent B4-15 B4-25 B4-40 B4-50 B5--15 B5-25 <br /> rBenzene <10. 0 <10. 0 11862 <10. 0 <10. 0 <10. 0 <br /> Toluene <10. 0 <10. 0 41348 <10. 0 493 <10. 0 <br /> Ethylbenzene <10.0 <1.0. 0 21567 <10. 0 1386 <10. 0 <br />' para+meta-Xylene 94 . 2 <10. 0 74915 407 5476 1051 <br /> ortho-Xylene 13 . 1 <10. 0 35316 106 2695 300 <br /> Lead, mg/kg 2 . 2 < 2 . 0 <br /> Constituent B5--40 B5-50 B6-15 B6-30 B6-40 B6-50 <br /> Benzene <10. 0 36.8 <10. 0 <10. 0 <10. 0 <10. 0 <br /> Toluene <10. 0 39.9 <10. 0 <10. 0 <10. 0 <10. 0 <br /> Ethylbenzene 158 1108 <10. 0 <10. 0 <10. 0 <10. 0 <br /> para+meta-Xylene 395 3988 945 <10. 0 <10. 0 <10. 0 <br />' ortho-Xylene 77 .7 1937 282 <10. 0 <10. 0 <10. 0 <br /> Lead, mg/kg < 2 . 0 <br /> Sample Depth Component Result Detection <br /> Number feet Name (mg/kg) Limit <br /> B-4 15 Gasoline ND 1. 0 <br /> B-4 25 Gasoline ND 1. 0 <br /> B-4 40 Gasoline 745 1. 0 <br /> B-4 50 Gasoline 18 . 4 1. 0 <br /> B-5 15 Gasoline 54 . 9 1. 0 <br /> B-5 25 Gasoline ND 1. 0 <br /> B-5 40 Gasoline 1 . 5 1 . 0 <br /> B-5 50 Gasoline 27 . 0 1. 0 <br /> B-6 15 Gasoline ND 1. 0 <br /> B-6 30 Gasoline ND 1. 0 <br /> Results continued on next page. <br /> 3732 W Century Blvd, Unit 3, Inglewood, CA 90303 • (310) 671-5346 •Fax (310) 6717216 <br /> ,t9 <br />