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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415)364-9233
<br /> Analytical 1900 sates Avenue,Suite L Concord,CA 94520 (510) 686.9604 FAX(510)686-9689
<br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921.9600 FAX(916)921-0100
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<br /> ac c Environmental Grou Client Project I[]: 31 �x1. Bi`klant'-
<br /> >:< p ) 0-00 03/0788, u P
<br /> x;2025 Gateway Place, Suite 440 Matrix: Solid
<br /> Ali $='San Jose, CA 95110
<br />', �Attent�ion:�Maree Dollen QC Sample Grou . 94(}9054 i3, 17 27 Reported: Se 16, 1994~
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<br /> QUALITY CONTROL DATA REPORT
<br /> ANALYTE Benzene Toluene Ethyl Xylenes
<br /> Benzene
<br /> Method: EPA 8020 EPA 802o EPA 8020 EPA 8020
<br /> Analyst: R.Geckler R.Geckler R.Geckler R Geckler
<br /> MS/MSD
<br /> Batch#: 940905401 940905461 940905401 940905401
<br /> Date Prepared: 9/7/94 9/7/94 9/7/94 9/7/94
<br /> Date Analyzed: 9/7/94 9/7/94 9/7/s4 9/7/94
<br /> Instrument I.D.#: GCHP-18 GCHP-18 GCHP-16 GCHP-18
<br /> Conc. Spiked: 0.20 mg/kg 0.20 mg/kg 0.20 mg/kg 0.60 mg/kg
<br /> Matrix Spike
<br /> %Recovery: 95 95 95 97
<br /> Matrix Spike
<br /> Duplicate%
<br /> Recovery: 90 95 95 95
<br /> Relative%
<br /> Difference: 5.4 0.0 0.0 21
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<br /> LCS Batch#:
<br /> Date Prepared:
<br /> Date Analyzed:
<br /> Instrument I,D.#:
<br /> LCS%
<br /> Recovery:
<br /> %Recovery
<br /> Control Limits: 55-145 47-149 47-155 56.140
<br /> Please Note:
<br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents,
<br /> UO)A ANA�.YCICAL preparation,and analytioai methods employed for the samples. The matrix spike is an aliquot of sample
<br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure. tf
<br /> e recovery of analytes from the matrix spike does not fall within specified control limits due to matrix -
<br /> inte erence,the LCS recovery is to be used to validate the batch.
<br /> een A. Manning
<br /> Project Manager 9409054.PPP <7,
<br />
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