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Sequoia 680 Chesapeake Or— Redwood City CA 94063 (415) 364-9600 FAX(415) 364 9233 <br /> 1900 late,Avenue Suite L Concord,CA 94520 (510) 686 9600 FAX(510)686 9689 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Iwo <br /> Blaine Tech Services, Inc Client Project ID 940510-K1, Shell, 620 W Charter Way <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller OC Sample Group 4E74801-02, 04, 06-07, 11 Reported May 23,_1994 <br /> �hx n <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#, 4E67705 4E67705 4ES7705 4E67705 <br /> Date Prepared - <br /> Date Analyzed. 5/15/94 5/15/94 5/15/94 5/15/94 <br /> Instrument 11014, GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Conc. Spiked: 10ug/L 10ug/L 10ug/L 30Yg/L <br /> . Matrix Spike <br /> % Recovery 93 90 s1 s0 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery, 93 89 94 <br /> Relative% <br /> Difference- 00 <br /> 2 2 2 2 0 0 <br /> LCS Batch# - - - <br /> Date Prepared* - <br /> Date Analyzed. <br /> Instrument I D.#- ' <br /> LCS % <br /> Recovery. - <br /> ',6 ecovery <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 /> 10E000IA ANALYTICAL preparation,and anaiyti Cal methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> 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 /> Suzanne Chin 4E74801 BLA <4> <br /> Project Manager <br />