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r <br /> SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive - Redwood City, CA 94063 <br /> (415) 364-9600 - FAX (415) 364-9233 <br /> 7_1rc�ANwk3F irrrcrv6 wry/r�r rr.GLM Y,Y�•vvv m-•r�w+Y rT.v v/ Y��rSS Av:.Vu. i.Y�w IN A i4 +.+..$�.L$' •.tA'wGrr�iYlY/.VeY �ri+ALwrFff vY.4FKxf <br /> Blaine Tech Services,Inc rc Client Project ID r Shell, 141 N EI Dorado <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller QC Sample Group 46A1402, 04 Deported Feb'25, 1994 <br /> n n•r+• . v r r r .. v + r , •4u r ♦ r •✓ry5r 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 J Hinkel J Minkel J Minkel J Minkel <br /> MS/MSD <br /> Batch# 4895508 4896609 4896608 4896508 <br /> Date Prepared - - <br /> Date Analyzed 2/19/94 2/19/94 2/19/94 2/19/94 <br /> Instrument I D # GCnP 2 GCHP 2 GCHP 2 GCHP 2 <br /> Conc Spiked 10vg/L 10pg/L 10Frg/L 30pg/L <br /> . Matrix Spike <br /> % Recovery 95 96 95 97 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery o0 100 100 100 <br /> Relative % <br /> Difference 51 41 51 30 <br /> r • • r r . . , f. , wwx. .,. ,, r. , <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 /> Please Note <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> lEOUOIA ANALYTICAL preparation.and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> <_ forbfied 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 Hmds due to matnx <br /> interference,the LCS recovery is to be used to validate the batch <br /> uzanne Chin <br /> Project Manager 48n1401 BtH csr <br />