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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233
<br /> Analytical 1900 Bates Avenue Suite L Concord CA 94520 (510) 686 9600 FAX(510)696 9689
<br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921-9600 FAX(916)921 0100
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<br /> RESNA^ K.0 Client Project ID' ' 1154077 01, Holt+Bros
<br /> ;1710 Main Street Matrix Water t
<br /> �Escalon, CA 95320 ,`
<br /> -Attention John Lane OC Sample Group 4CF9001-5 Reported Apr 7, 1994
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<br /> QUALITY CONTROL DATA REPORT
<br /> ANALYTE 1,1-Dehloro- Tnchloro- Chloro-
<br /> ethene ethene benzene
<br /> Method: EPA 8010 EPA 8010 EPA 8010
<br /> Analyst: M Nguyen M Nguyen M Nguyen
<br /> MS/MSD
<br /> Batch#: 40306MMS 403068SMS 4030688MS
<br /> Date Prepared: 3/30/94 3/30/94 3/30/94
<br /> Date Analyzed: 3/30/94 3/30/94 3/30/94
<br /> Instrument I.D.#: GCHP-3 GCHP-3 GCHP-3
<br /> Conc. Spiked: 10pg/L 10ug/L ioug/L
<br /> Matrix Spike
<br /> %Recovery: 98 92 106
<br /> Matrix Spike
<br /> Duplicate%
<br /> Recovery: 96 as 97
<br /> Relative%
<br /> Difference: 21 6 7 8 9
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<br /> LCS Batch#: - LCS033094 LCS033094 LCS033094
<br /> Date Prepared: 3/30/94 3/30/94 3/30/94
<br /> Date Analyzed: 3/30/94 3/30/94 3/30/94
<br /> Instrument I.D.#: GCHP-3 GCHP-3 GCHP-3
<br /> LCS %
<br /> Recovery: 72 87 104
<br /> h
<br /> ',b ecovery
<br /> ontrol Limits: 28-167 35-146 38-150
<br /> Please Note
<br /> SEQUOIA ANALYTICAL The LCS 1s a control sample of known,interferent free matrix that 1s analyzed using tate same reagents,
<br /> ELAP #1894 preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample
<br /> forbfied 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 1s to be used to validate the batch
<br /> Vickie Tague Clark
<br /> Project Manager 4CF9001 WAT <10>
<br />
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