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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9133 <br /> Analytical 1900 Bates Avenue Suite L Concord,CA 94520 (510) 686 9600 FAX(510)686 9689 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 1916) 921 9600 FAX(916)921 0100 <br /> ro West, Inc Client Project ID Shell,141 N El Dorado,Stockton,CA Sampled Jul ,11, 1994 <br /> 0 Melody Lane, Ste 160 Sample Matrix Air Received Jul 1' 1994 <br /> Roseville, CA 95678 Analysis Method EPA 5030/8015/8020 Reported Jul 1-, 1994 <br /> Attention Paul Graff First Sample# 407-0402 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample <br /> Analyte Limit ID ID ID <br /> mg/m3 407-0402 407-0403 407-0404 <br /> C-1 EFF@ INF @ C-2 EFF @ <br /> 1000 Hrs 1010 Hrs 0950 Hrs <br /> Purgeable <br /> Hydrocarbons 50 19 84 N D <br /> Benzene 0 050 N D N D N D <br /> Toluene 0 050 017 N D N D <br /> Ethyl Benzene 0 050 067 0 67 N D <br /> Dotal Xylenes 0 050 50 45 N D <br /> Chromatogram Pattern C6-1312 C&C12 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 10 10* 1 0 <br /> Date Analyzed 7/12'94 7/12/94 7/12/94 <br /> Instrument Identification HP-2 HP-2 HP-2 <br /> Surrogate Recovery, % 96 94 97 <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 /> SEQUOIA ANALYTICAL Please Note <br /> P #1624 Detection limit raised due to limited sample volume <br /> Linda C Schneider <br /> Project Manager <br /> 4070402 FUG <1> <br />