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Sequoia 680 Chesapeake Drive Redwood City, CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> %07 Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (9t6) 921 9600 FAX (916)921 0100 <br /> ochstone Development Client project ID Chevron #9-2033 Sampled Se 9 199 <br /> p p 6 <br /> P O Box 2554 Sample Matrix Sol[ Received Sep 10, 1996 <br /> Santa Rosa, CA 95405 Analysis Method EPA 5030/8015 Mod /8020 Reported Sep 11, 1996 <br /> Attention Jeff Monroe First Sample# 609-0433 <br /> QC Batch Number SP091096 SP091096 <br /> TOTAL PURGEABLE PETRO UM EXA <br /> PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample <br /> Analyte Limit I D I D <br /> mg/kg 609-0433 609-0434 <br /> P4-4 5 P5-4 <br /> Purgeable <br /> Hydrocarbons 10 190 550 <br /> Benzene 00050 N D 2 8 <br /> Toluene 00050 N D 13 <br /> Ethyl Benzene 00050 036 73 <br /> • <br /> Total Xylenes 00050 2 4 37 <br /> MTBE 0 050 N D N D <br /> Chromatogram Pattern Unidentified Gasoline <br /> Hydrocarbons >C8 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 20 50 <br /> Date Analyzed 9/10/96 9/10/96 <br /> Instrument Identification HP-4 HP-4 <br /> Surrogate Recovery, % 89 120 <br /> (QC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against afresh gasoline standard <br /> Analytes reported as N D were not detected above the stated reporting limit <br /> SEQUOIA ANALYTICAL, #1271 <br /> Melissa A Brewer <br /> Client Services Representative <br /> 6090425 TOU <3> <br />