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680 Chesapeake Drive Redwood City CA 94063 (650)364-7600 FAX(650)364-9733 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988 9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0 100 <br /> Analytical 155;McDowell BlvRoad <br /> North Ste D San Iuma Ca CarA 94954 (707)los 940 0-4111 (6 0)232-9600 FAX(650)232-961865 FAX(707) 2 <br /> ,r Client Project lb Arco #4932 Stockton Sampled May 1 p y 26 1999 <br /> .2 Business Park Dr, Suite #100 Sample Matrix Sod Received May 27, 1999 <br /> acramento, Ca 95827 Analysis Method EPA 5030/8015 Mod /8020 Reported Jun 1, 1999 <br /> Attention Rusty Benkosky First Sample # 905-2421 <br /> CC Batch Number SP060199 SP060199 SP060199 <br /> 8020EXA 8020EXA 8020EXA <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX / MTBE <br /> Reporting Sample Sample Sample <br /> Analyte Limit I D I D I D <br /> mg/Kg 905-2421 905-2422 905-2423 <br /> STP-1 STP-2 STP-3 <br /> Purgeable <br /> Hydrocarbons 10 N D N D 37 <br /> Benzene 00050 N D N D N D <br /> Toluene 00050 N D N D 00063 <br /> Ethyl Benzene 00050 N D N D 00057 <br /> Total Xylenes 00050 N D N D 0 014 <br /> MTBE 0 050 N D N D N D <br /> Chromatogram Pattern - Gasoline& <br /> Unidentified <br /> Hydrocarbons <br /> Quality Control Data > C10 <br /> Report Limit Multiplication Factor 10 10 1 0 <br /> Date Analyzed 6/1/99 6/1/99 6/1/99 <br /> Instrument Identification HP-4 HP-4 HP-4 <br /> Surrogate Recovery, % 120 105 106 <br /> (DC Limits = 40-140%) <br /> Purgeabte 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 /> Dimple Sharma <br /> Project Manager <br /> 9052421 SSS <1> <br />