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ti� rn iSequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> 4D- Analytical 819 Striker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Smith- Canonle Environmental Client Project ID 94-331-01, Holt Bras <br /> 1710 Main Street Matrix Liquid <br /> Escalon, CA 95320 <br /> Attention John Lane OC Sample Group 9506209-01-3 Reported Jun 20, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE 1,1-Dichloro- Trichloro- Chloro- <br /> ethene ethene benzene <br /> Method EPA 8010 EPA 8010 EPA 8010 <br /> Analyst K Pucan K Pucan K Pucan <br /> MS/MSD <br /> Batch# 5060240 5060240 5060240 <br /> Date Prepared 6/14/95 6/14/95 6/14/95 <br /> Date Analyzed 6/14/95 6/14/95 6/14/95 <br /> Instrument I D # GCHP5 GCHP5 GCHP5 <br /> Cone Spiked 10pg/L tong/L 10pg/L <br /> Matrix Spike <br /> • % Recovery 83 85 79 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery 83 85 80 <br /> Relative% <br /> Difference 0 0 0 0 13 <br /> LCS Batch# LCS061495 LCS061495 LCS061495 <br /> Date Prepared 6/14/95 6/14/95 6/14/95 <br /> Date Analyzed 6/14/95 6/14/95 6/14/95 <br /> Instrument I D # GCHP5 GCHP5 GCHP5 <br /> LCS % <br /> Recovery 117 106 101 <br /> % Recovery <br /> Control Limits 28 167 35 146 38-150 <br /> Please Note <br /> SEQUOIA ANALYTICAL The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> Elap #1624 preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> 0fortified 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 /> Vickie Tague Clark <br /> Project Manager 9506209 CAN 44> <br />