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E <br /> SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord,California 94520 <br /> (510) 686.9600 FAX (510) 686-9689 <br /> Oiio-n Geo-Wence Clfeilt Project iD . Former Mobil 0042/30-0136 <br /> 30-A Lindbergh Ave. Sample Matrix: Wafer / Sampled: Oct 28, 1993 <br /> Recelved: Oct 29, 1993 <br /> Livermore, CA 94550 Analysis Method: EPA 5030/8015/8020 Reported: Nov 8, 1993 <br /> Attention Stephan Rosen First Sample : 310-1633 <br /> v 4 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit I.D. I.D. I.D. I.D. I.D. I.D. <br /> Ng/L 310-1633 310-1634 310-1635 310-1636 310-1637 310-1638 <br /> AW-4 AW-2 AW-1 AW-3 AW-10 AW-9 <br /> Purgeabie <br /> Hydrocarbons 50 N.D. N.D. N.D. N.D. N.D. N.D. <br /> Benzene 0.5 N.D. N.D. N.D. N.D. 0.76 N.D. <br /> Toluene 0.5 N.D. N.D. N.D. N.D. N.D. N.D. <br /> Ethyl Benzene 0.5 N.D. N.D. N.D. N.D. N.D. N.D. <br /> Total Xylenes 0. <br /> YI 5 N.D. N.D. N.D. N.D. N.D. N.D. <br /> Chromatogram Pattern: <br /> Quality Control Data <br /> Report Limit Multiplication Factor: 1.0 1.0 1.0 1.0 1.0 1.0 <br /> Date Analyzed: 11/5/93 11/4/93 11/4/93 11/4/93 11/4/93 11/5/93 <br /> Instrument Identification: HP-4 HP-2 HP-2 HP-2 HP-2 HP-2 <br /> Surrogate Recovery, %: 100 102 105 101 105 109 <br /> (OC Umits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard. <br /> Analytes reported as N.D.were not detected above the stated reporting limit. <br /> EQI.IOIA CAL .�- <br /> NOV 12 1993 <br /> ren C Enstrom --�:. , <br /> Project Manager <br /> Liv'-.. <br /> J-b <br /> 3101633.ALT <1> <br />