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e <br /> Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 1900 Sates Avenue Suite L Concord CA 94520 (510) 686 9600 FAX(510)686 9689 <br /> Analytical 819 Stnker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services Inc Client Project ID 940510-K2, Shell, 6131 Pacific Avenue A H } <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller OC Sample Group 4E73202 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 Muattab A Muaftab A.Mlraftab A. Mcraftab <br /> MS/MSD <br /> Batch# 4E69103 4E69103 4E69103 4E69103 <br /> Date Prepared. - -Date Analyzed: 5/14/94 5/14/94 5/14/94 5/14/94 <br /> Instrument I.D.#: GCHP-17 GCHP-17 GCHP-17 GCHP-17 <br /> Conc Spiked: lope/L 10pg/L lope/L 30pg/L <br /> Matrix Spike <br /> % Recovery- 120 120 120 120 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 100 100 100 100 <br /> Relative% <br /> Difference: 18 18 is 18 <br /> LCS Batch#: - - <br /> Date Prepared - - - <br /> Date Analyzed - - <br /> Instrument I D.#: - <br /> f rs 04 <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 is analyzed using the same reagents, <br /> *SEQUOIA ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subfected to the entire analytical procedure if <br /> the recovery of anaiytes 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 /> Suzanne Chin <br /> Project Manager 4E73201 BLA <3> <br />