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Sequoia 680 Chesapeake Drive Redwood City, CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 404 N Wjget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> VAW Analytical 819 Sinker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> echstone Development Client Project lb <br /> P O Box 2554 � Chevron #9-2033 Sampled Sep 9, 1996 <br /> Sample Matrix Sod Received Sep 9, 1996 <br /> Santa Rosa, CA 95405 Analysis Method EPA 5030/8015 Mod /8020 Reported Sep 12, 1996 <br /> Attention Jeff Monroe First Sample # 609-0461 <br /> QC Batch Number SP091096 SPO-91096 SP091096 SP091096 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS withaBTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample <br /> Analyte Limit I D I D I D I D <br /> mg/kg 609-0461 609-0462 609-0463 609-0464 <br /> SP-1 {A-D) SP-2 (A-D) SP-3 (A-D) PSP-11 (A-D) <br /> Purgeable <br /> Hydrocarbons 1 0 1 1 1 0 2 3 490 <br /> Benzene 00050 N D N D N D 015 <br /> Toluene 00050 N D N D N D 1 3 <br /> Ethyl Benzene 00050 N D N D N D 3 9 <br /> • <br /> Total Xylenes 00050 N D 00054 00085 22 <br /> Chromatogram Pattern Unidentified Unidentified Unidentified Gasoline <br /> Hydrocarbons Hydrocarbons Hydrocarbons <br /> >C8 >C8 >C8 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 1 0 10 20 <br /> Date Analyzed 9/10/96 9/10/96 9/10/96 9/10/96 <br /> Instrument Identification HP-5 HP-5 HP-5 HP-5 <br /> Surrogate Recovery, % 88 87 93 70 <br /> (OC Limits = 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 /> SEQUOIA ANALYTICAL, #1271 <br /> Q <br /> Melissa A Brewer <br /> Client Services Representative <br /> 6090461 TOU c 1> <br /> R� <br />