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Sequoia 680 Chesapeake Drive Redwood Ctry CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Stinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Iwo <br /> EMCON Client Project lD IBC-Stockton Sampled Nov 17 1997 <br /> 1433 N Market Blvd Sample Matrix Water Received Nov 18 1997 <br /> Sacramento CA 95834 Analysis Method EPA 5030/8020 DHS Luft Reported Dec 4, 1997 <br /> Attention Claudio Avila First Sample # 711-0991 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample <br /> Analyte Limit I D I D <br /> lig/L 711-0991 711-0992 <br /> MW-1 MW-2 <br /> Purgeabie <br /> Hydrocarbons 50 280 290 <br /> Benzene 050 56 48 DEC y s 1997 <br /> Toluene 0 50 N D N D <br /> Ethyl Benzene 050 15 31 <br /> Total Xylenes 0 50 14 2 8 <br /> Chromatogram Pattern Weathered Weathered <br /> Gasoline Gasofine <br /> C6 C12 C&C12 <br /> Duality Control Data <br /> Reporting Limit <br /> Multiplication Factor 20 20 <br /> Date Analyzed 11/25/97 11/25/97 <br /> Instrument Identification GCHP-7 GCHP-7 <br /> Surrogate Recovery, % 105 106 <br /> (DC Limits = 60-140%) <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 /> SEQUOIA ANALYTICAL,YLAP #1624 <br /> Linda C Schneider <br /> �i`Pro)ect Manager/Sacramento Laboratory <br /> 7110991 EMC <1, <br />