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0 Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 1900 Bates Avenue Suit,L Concord CA 94520 (510) 686 9600 FAX(510) 686 9689 <br /> '%W Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> ID <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 4E74810, 12-13 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#• 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. Spliced: 10pg/L 10ug/L 1oN9/L 30N9/L <br /> Matrix Spike <br /> %Recovery. 100 98 98 100 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 100 99 98 100 <br /> Relative % <br /> Difference 00 10 <br /> D o 0 0 <br /> LCS Batch# - - <br /> Date Prepared. <br /> Date Analyzed <br /> Instrument I D #. <br /> LCS % <br /> Recovery - ' <br /> Flecovery <br /> Control Limits 71-133 72-128 72-130 T1-12D <br /> Please Note <br /> The LCS 1s a control sample of known interferent free matrix that is analyzed using the same reagents <br />�I 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 subjected to the entire analytical procedure tt <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> � <br /> interference the LCS recovery is to be used to validate the batch <br /> Suzanne hln 4E74801 BLA 47> <br /> Project Manager <br />