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rs 'n <br /> SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City, CA 94063 <br /> (415) 364-9600 FAX(415) 364-9233 <br /> RESNA ^0ierrt Project ID W0462'00, Holt Bros/ tockton <br /> 1710 Main Street Matnx Water <br /> 'Escalon, CA 95320 <br /> Attention John Lane QC Sample Group 3C47801-05 Reported Mar 23, 1993 <br /> r} { v t, v . v~S4} n . r r r r v '. v n .'♦ n vq{n{v CtY++n v., nrvr.n w3ry 4.x `454/ir <br /> QUALITY CONTROL DATA REPORT <br /> ANAL E Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: M Nipp M Nipp M Nipp M Hipp <br /> Conc. Spiked: 10 10 10 30 <br /> Units: ug/L ug/L ug/L ug/L <br /> LCS Batch#: GBLK031293 GBLK031293 GBLK031M GBLK03120 <br /> Date Prepared: - - - - <br /> Date Analyzed 3/12/93 3/12/93 3/12/93 3/12/93 <br /> enstrument I D #: GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> LCS% <br /> Recovery: 93 93 93 93 <br /> Control Limits: 80.120 80-120 80-120 80-12D <br /> MS/MSD <br /> Batch#: 930333103 930333103 930333103 930333103 <br /> Date Prepared: - - - - <br /> Date Analyzed 3/12/93 3/12/93 3/12/93 3/12/93 <br /> Instrument I.D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Matnx Spike <br /> % Recovery: 99 98 98 100 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 92 91 91 90 <br /> Relative% <br /> Difference: 73 74 74 1 1 <br /> EQUOIA ANALYTICAL Please Mote <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> validation of sample batch results Due to matrix effects,the QC limits for MS/MSUs are advisory only <br /> _ - and are not used to accept or reject batch results - <br /> Maz Vager--- <br /> Prol ' <br /> 3C47801 WAT <9> <br />