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j SEQUOIA ANALYTICAL
<br /> 680 Chesapeake Drive • Redwood City, CA 94063
<br /> �, ;. (415) 364-9600 FAX (415) 364-9233
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<br /> 1710 Main Street Matrbc: Soil =u
<br /> Escalon, CA r2OAention: JoLane OC Sample Group: 3H23301-2,4-5,7-12 Reported: Aub 18, 1993 in
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<br /> QUALITY CONTROL DATA REPORT
<br /> ANALYTE Ethyl-
<br /> Benzene Toluene Benzene Xylenes Diesel
<br /> i Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015
<br /> l Analyst: E.Cunanan E Cunanan E.Cunanan E.Cunanan C.Lee
<br /> Conc. Spiked: 0.20 0.20 0.20 0.60 15
<br /> Units: mg/Kg mg/Kg mg/Kg mg/Kg mg/Kg
<br /> LCS Batch#: BLKo81193 BI-KO81193 BLKD81193 BLK081193 BLK081293
<br /> Date Prepared: 8/11/93 8/11/93 8/11/93 8/11/93 8/12/93
<br /> Date Analyzed: 8/11/93 8/11/93 8/11/93 8/11/93 8/12/93
<br /> instrument i.D.#: GCHP-18 GCHP-18 GCHP-18 GCHP-18 GCHP-58
<br /> LCS%
<br /> Recovery: 95 100 100 98 67
<br /> Control Limits: 60-140 60-140 60.140 60-140 50.150
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<br /> MS/MSD
<br /> Batch#: 3H26502 3H26502 3H26= 3H28502 3H44003
<br /> Date Prepared: 8/11/93 8/11/93 9/11/93 8/11/93 8/12/93
<br /> J Date Analyzed: 8/11/93 8/11/93 8/11/93 8/11/93 8/12/93
<br /> Instrument I.D.#: GCHP-18 GCHP-18 GCHP-18 GCHP-18 GCHP-513
<br /> Matrix Spike
<br /> % Recovery: 95 95 95 97 73
<br /> F< Matrix Spike
<br /> Duplicate%
<br /> Recovery: 100 105 105 103 80
<br /> Relative%
<br /> Difference: 5.1 10 10 6.0 9.2
<br /> I
<br /> SEQUOIA ANALYTICAL Please Note:
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<br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents,
<br /> s ti r preparation and analytical methods employed for the samples. The LCS%recovery data is used for I
<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 3H23301.WAT a7>
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