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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364.9233
<br /> 4 404 N.Wiact Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(Sio) 988.9673
<br /> An alyticaa 19 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921.9600 FAX(916)921-0100
<br /> n.:
<br /> Witon Geosclence in cy,CA
<br /> O-A'Lindbergh Ave. Matrix: Liquid
<br /> '{Livermore, CA 94550
<br /> Attention: Ailsa Le May CC Sample Group: 6011574-584 Reported: Feb 2, 1996:::
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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: C.Chapman C.Chapman C.Chapman C.Chapman
<br /> MS/MSD
<br /> Batch#: 6011176 6011176 6011176 6011176
<br /> Date Prepared: 1/31/96 1/31/96 1/31/96 1/31/96
<br /> Date Analyzed: 1/31/96 1/31/96 1/31/96 1/31/96
<br /> Instrument I.D.#: HP-2 HP-2 HP-2 HP-2
<br /> Conc. Spiked: 10pg/L 10pg/L 10Ng/L 30pg/L
<br /> Matrix Spike
<br /> % Recovery: 97 99 99 100
<br /> Matrix Spike
<br /> Duplicate%
<br /> Recovery: 90 95 94 92
<br /> Relative%
<br /> Difference: 7.5 4.1 5.2 8.3
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<br /> LCS Batch#: LCS013196 LCS013196 LC8013196 LCS013196
<br /> Date Prepared: 1/31/96 1/31/96 1/31/96 1/31/96
<br /> Date Analyzed: 1/31/96 1/31/96 1/31/96 1/31/96
<br /> Instrument I.D.#: HP-2 HP-2 HP-2 HP-2
<br /> LCS %
<br /> Recovery: 101 103 104 104
<br /> % Recovery
<br /> Control Limits: 71-133 72-128 72-130 71-120
<br /> Please Note:
<br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents,
<br /> S. ANALYTICAL, #1624 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 tall within specified control limits due to matrix
<br /> interference,the LCS recovery is to be used to validate the batch.
<br /> tK1e Slambrookkroje t Ma ager
<br /> 6011574.ALT <6>
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