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<br /> Sequoia 680 Chesapeake privc Redwood City,CA 94063 (415) 364-9600 FAX(415) 364-9233
<br /> 1900 Bates Avenue,Suite L Concord,CA 94510 (510) 686-9600 FAX(510)686-9689
<br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-010o
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<br /> p of c ID: 310-OD1.03(0788,$u
<br /> x.2025 Gateway Place, Suite 440 Matrix: Solid
<br /> n San Jose, CA 95110
<br /> Attention: Maree Doden QC Sample Grou 9409054 01-12, 14-16 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 8020 EPA 8020 EPA 8020
<br /> Analyst: FL Geckler R Geckler R.Geckler R Geckler
<br /> MS/MSD
<br /> Batch#: 940907404 940907404 940907404 940907404
<br /> Date Prepared: 9/6/94 9/6/94 9/6/94 9/6/94
<br /> Date Analyzed: 9/6/94 9/6/94 9/6/94 9/6/94
<br /> Instrument I.D.#: GCHP-18 GCHP-18 GCHP-18 GCHP-18
<br /> Cone.Spiked: 0.20 mg/kg 0.20 mg/kg 0.20 mg/kg 0.60 mg/kg
<br /> Matrix Spike
<br /> %Recovery: 100 100 100 100
<br /> Matrix Spike
<br /> Duplicate%
<br /> Recovery: 95 100 100 .100
<br /> Relative%
<br /> Difference: 5.1 0.0 0.0 '0.0
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<br /> LCS Batch#:
<br /> Date Prepared:
<br /> Date Analyzed:
<br /> Instrument I.D.#:
<br /> LIDS %
<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 /> 4EQUOIA ANALYTICAL preparation,and analytical 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, if
<br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix
<br /> interference,the LCS recovery is to be used to validate the batch.
<br /> Eileen A. Manning
<br /> Project Manager 9409054•PPP <6>
<br />
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