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Sequoia 680 Chesapeake Drive Redwood CLty CA 94063 (415) 364 9600 FAX(415) 364-9233 <br /> Analytical 1900 gates Avenue Suite L Concord,CA 94520 (510) 686 9500 FAX(5 10)686 9689 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc { Client Project ID 940510-L3,Shell, 4445 Pershing Ave Y„ f <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller OC Sample Group 4E67905-06 Reported May 23, 1994 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: A Miraftab A.Miraftab A Miraftab A-Miraftab <br /> MS/MSD <br /> Batch#: 4E69104 4E69104 4E69104 4E69104 <br /> Date Prepared: - - - <br /> Date Analyzed: 5/14/94 5/14/94 5/14/94 5/14/94 <br /> Instrument I D.#: GCHP-3 GCHP 3 GCHP-3 GCHP 3 <br /> Conc. Spiked: 10ug/L 10ug/L 10ug/L 30ug/L <br /> Matrix Spike <br /> %Recovery* 91 91 92 90 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery* 92 91 92 93 <br /> Relative% <br /> Difference. 11 00 00 33 <br /> LCS Batch#- - - - <br /> Date Prepared <br /> Date Analyzed. - <br /> Instrument I D.# - - <br /> LCS % <br /> Recovery: - - <br /> %Recovery <br /> Control Limits: 71-133 72-128 72-130 71-120 <br /> Please Note <br /> The LCS is a control sample of known,interferent free matrix that 1s analyzed using the same reagents, <br /> QUOIA ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quanbtles of specific compounds and subjected to the entire analytical procedure If <br /> 7 the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> U e hln <br /> Project Manager 4E67901 BLA <4> <br />