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4D— Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 404 N Wigct tone Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> WAWAnalytical 819 Striker Avenue Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> GeoS6ategles Inc Client Project lb Unocal#0187 Sampled A Jul 19, 1995;x <br /> 3035 Prospect Park Dr, Suite 80 Sample Matrix Soil Received Jul 21, 1995' <br /> Rancho Cordova, CA 95670 Analysis Method EPA 5030/8015/8020 Reported Jul 28, 1995,- <br /> Attention Stephen J Carter First Sample # 507-1053 <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 /> mg/kg 507-1053 507-1054 507-1055 507-1056 507-1057 507-1058 <br /> UP-25 UP-35 UP-40 U4-10 U4-25 1.14-40 <br /> Purgeable <br /> Hydrocarbons 10 3,400 20,000 3,400 41 N D N D <br /> Benzene 00050 N D 99 15 0 011 N D N D <br /> Toluene 00050 31 670 98 0 064 N D N D <br /> Ethyl Benzene 00050 41 340 56 0 76 N D N D <br /> Dotal Xylenes 00050 240 1,500 270 2 7 N D N D <br /> Chromatogram Pattern Gasoline Gasoline Gasoline Gasoline -- -- <br /> C6-C12 C6-C12 C6-C12 C6-C12 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 100 250 50 1 0 1 0 1 0 <br /> Date Analyzed 7/27/95 7/27/95 7/27/95 7/27/95 7/27/95 7/27/95 <br /> Instrument Identification HP-1 HP-1 HP-1 HP-1 HP-1 HP-1 <br /> Surrogate Recovery, % 96 * 116 106 94 80 <br /> (QC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected at or above the reporting limit <br /> S UOIA ANALYTICAL, FLAP #2000 <br /> Janet arlan t <br /> Project Manager <br /> 5071047 GSI <2> <br />