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SEQUOIA ANALYTICAL <br /> 684 Chesapeake Drive - Redwood City, CA 94063 <br /> (415) 364-9600 - FAX (415) 364-9233 <br /> s ,.s t."r<'q v rcyss .u...ce..,y.r r< N Hi N rr/"n-,.,...,r..r rw,F.. rr ew•-s....,..H Fw Is '/ l �f•nc} > ••�a. it.,if �+ra,.. ..,c., Nn N... Sv.U..tr��F.G.�.,,^.�n< :. ✓�} ♦'4,§c t�,... >twf 9�r.,[:;r.r�rYf.,. . .,,.. ti.. .a v.,,,..r`..,-.,�.scif9.//.aa;J.`hiF� <br /> Blaine Tec,rh Services, Inc Client Project ID YShell, 141 N EI Dorado <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller OC Sample Group 4BA1408 x art„Reped Feb 25{ 1994 <br /> rA <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: J Minkel J Minkel J Minkel J Minkel <br /> MS/MSD <br /> Batch#- 4660301 4BB0301 4660301 41380301 <br /> Date Prepared: - - <br /> Date Analyzed- 2/22/94 2/22/94 2/22/94 2/22/94 <br /> Instrument I D #' GCHP 2 GCHP 2 GCHP 2 GCHP 2 <br /> Conc. Spiked- 10pg/L 10yig/L 10Ng/L 30pg/L <br /> . Matrix Spike <br /> % Recovery- 130 1C3 100 103 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery 130 100 10o 103 <br /> Relative % <br /> Difference. 00 00 00 00 <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 /> Tease Note <br /> The LCS is a control sample of known,interferent free matrix that rs analyzed using the same reagents, <br /> OEQUOIA ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantrties of specific compounds and subjected to the entire anatytical procedure. H <br /> the recovery of analytes from the matrix spike does not fall within spec ied control limits due to matrix <br /> inlerference,the LCS recovery is to be used to validate the batch. <br /> Suzanne Chin <br /> Project Manager 4BA1401 13LA <y> <br />