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Sequoia 680 Chesapeake Drive Redwood City, CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> ' i900 Bates Avenue Suite L Concord CA 94520 '510} 686 9600 FAX(510) 686 9689 <br /> Sr Analytical <br /> 619 Striker Avenue Suite 8 Sacramento CA 95834 1916) 921 9600 FAX{916}921 0100 <br /> 010 <br /> Client Project 1D Shell,141 N EI Dorado,Stockton,CA Sampled Jul 11, 1994 <br /> Melody Lane, Ste 160 Sample Matrix Air Received Jul 11, 1994 <br /> Roseville, CA 95678 Analysis Method EPA 5030/8015/8020 Reported Jul 18, 1994 <br /> Attention Paul Graff First Sample# 407-0402 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample <br /> Analyte Limrt I D I D I D <br /> ppmv 407-0402 407-0403 407-0404 <br /> C-1 EFF@ INF @ C-2 EFF @ <br /> 1000 Hrs 1010 Hrs 0950 Hrs <br /> Furgeable <br /> Hydrocarbons 14 54 24 N D <br /> Benzene 0 016 N D N D N D <br /> Toluene 0 013 0 045 N D N D <br /> Ethyl Benzene 0 012 015 015 N D <br /> ltotal Xylenes 0 012 12 1 0 N D <br /> Chromatogram Pattern C6-C12 C8-C12 <br /> Duality Control Data <br /> Report Limit Multiplication Factor 1 0 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 /> (OC Limns = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Anaiytes reported as N D were not detected at or above the reporting limit <br /> SEQUOIA ANALYTICAL Please Note <br /> P * <br /> � *Detection limit raised due to limited sample volume <br /> Linda C Schneider <br /> Project Manager <br /> 4070402 FUG <2> <br />