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` SEQUOIA ANALYTICAL
<br /> 680 Chesapeake ty, CA 94063
<br /> {415}364-8600 FAX{415} 364-9233
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<br /> ,£1710 Main Street Matrix Liquid
<br /> Escalon, CA 95320 <r
<br /> <Attention John Lane OC Sample Group 3JC0601 Reported Oct 26, 1993
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<br /> ' QUALITY CONTROL DATA REPORT
<br /> ANALYTE Ethyl-
<br /> Benzene Toluene Benzene Xylenes
<br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020
<br /> Analyst: A.Miraftab A.Miraftab A.Miraftab A Miraftab
<br /> ' Conc. Spiked: 10 10 10 30
<br /> Units: f!g/L Fig/L ug/L yg/L
<br /> LCS Batch#. GBLK102293 GBLK102293 GBLK102293 GBLK102293
<br /> Date Prepared: - - - -
<br /> Date Analyzed: 10/22/93 10/22/93 10/22/93 10/22/93
<br /> Instrument I.D.#. GCHP-3 GCHP-3 GCHP-3 GCHP3
<br /> LCS %
<br /> Recovery: too 100 100 103
<br /> ' Control Limits 80-120 80-120 80-120 80-120
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<br /> ' MS/MSD
<br /> Batch#: 3JA39M 3JA3W2 3JA3902 3JA3902
<br /> Date Prepared: - - - -
<br /> Date Analyzed: 10/22/93 10/22/93 10/22/93 10/22/93
<br /> Instrument I.D,#: GCHP3 GCHP3 GCHP3 GCHP3
<br /> ' Matnx Spike
<br /> %Recovery: 93 94 94 93
<br /> Matrix Spike
<br /> Duplicate%
<br /> Recovery: 92 93 93 93
<br /> ' Relative%
<br /> Difference: t 1 1 1 1 1 00
<br /> SEQUOIA ANALYTICAL Please Note
<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 OC limits for MS/MSD's are advisory only
<br /> U and are not used to accept or reject batch results
<br /> Vickie Tague
<br /> Project Manager 3JC0601 WAT <2>
<br />
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