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` / - j Sequoia 680 Chesapeake Dnve 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 /> is <br /> Blaine Tech Services, Inc Client Project ID 940510-A2, Shell, 141 N El Dorado <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller OC Sample Group 4E73903-04, 10 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 /> Anal St: A.Miraftab A Miraftab A Miraftab A Miraftab <br /> MS/MSD <br /> Batch#: 4E67901 4E67901 4E67901 4E67901 <br /> Date Prepared. - - <br /> Date Analyzed 5/15/94 5/15/94 5/15/94 5/15/94 <br /> Instrument I D # GCHP 3 GCHP-3 GCHP-3 GCHP 3 <br /> Conc Spiked 1opg/L 10ug/L 10pg/L 30ug/L <br /> . <br /> Matrix Spike <br /> % Recovery' 100 98 98 100 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 100 99 98 100 <br /> i <br /> Relative% <br /> Difference 00 10 00 0 0 <br /> LCS Batch# - - <br /> Date Prepared* - <br /> Date Analyzed <br /> Instrument 1 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 is 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 quantities of specific compounds and subjected to the entire analytical procedure If <br /> J 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 <br /> Project Manager 4E73901 BLA <5> <br />