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SEQUOIA ANALYTICAL
<br /> 680 Chesapeake Drive - Redwood City, CA 94063
<br /> (415) 364-9600 - FAX(415) 364-9233
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<br /> ClieritrProject IDs W2102,TVGT
<br /> 1710 Main Street Matra Water
<br /> Escalon, CA 95320 v;
<br /> ,Attention Bill Channell OC Sample Group 3FD3401-05 Reported _Jul_14, 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: M Nipp M Nipp M Nipp M Nipp
<br /> Conc. Spiked: 10 10 10 30
<br /> Units: p9/L pg/L pg/L p9/L
<br /> LCS Batch#: GBLK070893 GBLK070893 GBLK070893 GBLK070893
<br /> Date Prepared. N/A N/A N/A N/A
<br /> Date Analyzed: 7/8/93 7/8/93 7/8/93 7/8/93
<br /> Instrument I D.#: GCHP-3 GCHP-3 GCHP-3 GCHP-3
<br /> LCS %
<br /> Recovery: 90 90 91 90
<br /> Control Limits: 80-120 80-120 80-120 80-120
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<br /> MS/MSD
<br /> Batch#: G3FD3404 G3FD3404 G3FD3404 G3FD3404
<br /> Date Prepared: N/A N/A N/A N/A
<br /> Date Analyzed. 7/8/93 7/8/93 7/8/93 7/8/93
<br /> Instrument I.D.#: GCHP-3 GCHP-3 GCHP-3 GCHP-3
<br /> Matrix Spike
<br /> % Recovery: 92 92 93 93
<br /> Matrix Spike
<br /> Duplicate%
<br /> Recovery: 93 91 93 93
<br /> Relative %
<br /> Difference: 1 1 1 1 00 00
<br /> SEQUOIA
<br /> 0
<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 /> iVf�f 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 T ect batch results
<br /> Vickie Tague
<br /> Project Manager 3FD3401 WAT <2>
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