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<br /> SEQUOIAANALYTICAL
<br /> Chesapeake680 Redwood City, CA
<br /> f; (415) 364-9600 FAX(415) 364-9233
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<br /> hRESNA Client Project ID: W0365.02, Stockton Smith Canal {
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<br /> 1710 Main Street Matrix: Water i{',;f
<br /> Escalon, CA 95320 }
<br /> Attention: John Lane QC Sample Grou . 3F56201-2 Reported:„p, ..p',•+- [forted: Jun 24, 1993
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<br /> QUALITY CONTROL DATA REPORT
<br /> ANALYTE Ethyl-
<br /> Benzene Toluene Benzene Xylenes Diesel
<br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015
<br /> Analyst: M.Nipp M.Nipp M.Nipp M.Nipp E.Cunanan
<br /> Conc. Spiked: 10 10 10 30 300
<br /> Units: pg/L p9/L N9/L ug/L yg/L
<br /> LCS Batch#: BLK062193 BLK062193 BLK062193 BLK062193 BLK061193
<br /> Dale Prepared: N/A N/A N/A N/A 6/11/93
<br /> Dale Analyzed: 6/21/93 6/21/93 6/21/93 6/21/93 6/11/93
<br /> ,!nstrument I.D.#: GCHP-3 GCHP-3 GCHP 3 GCHP-3 GCHP-5
<br /> LCS %
<br /> Recovery: 96 95 94 97 80
<br /> Control Limits: 80-120 80.120 80-120 80.120 50-150
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<br /> MS/MSD
<br /> Batch#: 31`87502 3FB7502 3FB7502 31F87502 BLK061193
<br /> Date Prepared: N/A N/A N/A N/A 6/11/93
<br /> Date Analyzed: 6/21/93 6/21/93 6%21/93 6/21/93 6/11/93
<br /> Instrument I.D.#: GCHP-3 GCHP-3 GCHP-3 GCHP-3 GCHP-5 }
<br /> Matrix Spike
<br /> %Recovery: 99 100 99 100 60
<br /> Matrix Spike k
<br /> Duplicate% k
<br /> Recovery: 100 100 100 100 83
<br /> Relative% E
<br /> Difference: 1.0 0.0 1.0 0.0 3.7 E
<br /> SEQUOIA ANALYTICAL Please Note:
<br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, 1.
<br /> preparation and analytical methods employed for the samples. The LCS%recovery data Is used for }
<br /> v�rl� t� validation of sample batch results. Due to matrix effects,the QC limits for MS/MSD's are advisory only
<br /> and are not used to accept or reject Batch results.
<br /> Vickie Tagus
<br /> Project Manager 31756201MAT a3>
<br />
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