SEQUOIA ANALYTICAL
<br /> 680 Chesapeake Drive • Redwood City, CA 94063
<br /> (415) 364-9600 FAX (415) 364-9233
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<br /> Client Project ID: W0365.02, Stockton Smith Canal r
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<br /> Escalon, CA 95320
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<br /> Attention: John Lane OC Sample Group 3H23303,6 Re rted
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<br /> QUALITY CONTROL DATA REPORT
<br /> ANALYTE Ethyl-
<br /> Benzene Toluene Benzene
<br /> Xylenes Diesel
<br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015
<br /> Analyst: M.Nipp M.Nipp M.Nipp M.Nipp C.Lea
<br /> Conc.Spiked: 10 10 10 30 300
<br /> :. i Units: pg/L pg/L ug/L p9/L pg/L
<br /> LCS Batch#: BLK081093 BLK081093 BLK081093 BLK081093 BLK080993*
<br /> Date Prepared: - - - - 8/9/93
<br /> Date Analyzed: 8/10/83 8/10/93 8/10/93 8/10/93 8/10/93
<br /> >..'Jnstrument I.D.#: GCHP3 GCHP-3 GCHP3 GCHP3 GCHP-5A
<br /> i
<br /> LCS %
<br /> Recovery: 100 100 100 100 48
<br /> Control Limits: 80-120 80-120 80-120 80-120 50-150
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<br /> MS/MSD
<br /> Batch#: 3H22805 31422805 3H228M SH22 M 3H17402
<br /> _- Date Prepared: - - - 8/9/93
<br /> Date Analyzed: . 8/10/93 8/10/93 8/10/93 8/10/93 8/10/93
<br /> Instrument I.D.#: GCHP_3 GCHP3 GCHP3 GCHP3 GCHP-5A
<br /> Matrix Spike E
<br /> % Recovery: 110 110 110 103 82
<br /> Matrix Spike
<br /> Duplicate%
<br /> Recovery: 110 100 110 103 n
<br /> �r
<br /> Relative%
<br /> Difference: 0.0 9.5 0.0 0.0 6.3
<br /> * Batch accepted due to MS MSD results within acceptance limits.
<br /> _SEQUOIA ANALYTICAL Please Note:
<br /> 1 The LCS is a oontrol 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 /> and are not used to accept or reject batch results.
<br /> Vickie Tague
<br /> Project Manager 3H23301.WAT <8>
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