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ILI Z4 SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City, CA 94063 <br /> (415) 364-9600 FAX (415) 364-9233 <br /> . .,.n,.,..,..s.•.+•+r..r,'�} +rvr ... .. ..r r.N.< r ., ......ry+ r..:nr.a..a...�.n.rpr...,.r .v v r ...,Y}rr,..r,.�i f..r,..,.-, Jr�r, N.i r f . V>,r..a .. ,. ,.y r <br /> r' <br /> Blaine tech Services,Inc Client Prolect ID Shell,6131 PacificAvenue <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller OC Sample Group 4BA1501, 05, 06 Reported Feb 24, 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: J Minkel J Minkel J Minkel J Minkel <br /> MS/MSD <br /> Batch#' G4BA1306 G4BA1306 G4BA1306 G46A1306 <br /> Date Prepared: N/A N/A N/A N/A <br /> Date Analyzed: 2/13/94 2/13/94 2/13/94 2/13/94 <br /> Instrument I.D #- GCHP-02 GCHP-02 GCHP-02 GCHP-02 <br /> Conc.Spiked: 10 ug/L 10 Ng/L 10 Ng/L 30 Ng/L <br /> Matrix Spike <br /> %Recovery- Zoo 100 100 103 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 99 100 100 100 <br /> Relative% <br /> Difference: 10 00 00 3 0 <br /> LCS Batch#- <br /> Date Prepared: <br /> Date Analyzed: <br /> Instrument I.D.#: <br /> LCS% <br /> -- Y. <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 tree matrix that is analyzed using the same reagents <br /> 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 oompounas and subjected to the entire anaiytical procedure If <br /> the recovery of analytes from the matrix spike does not fail 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 4BA1501 BLA <2> <br />