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r 1 11 r <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 1900 Sates Avenue Suite L Concord,CA 94520 (510) 686 9600 FAX(510)686 9689 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> RESNA n ��v Client Project 1D OW0327 00 Knowles Prop <br /> 1710 Main Street Matrix Liquid <br /> Escalon, CA 95320 <br /> Attention John Lane QC Sample Group 4E32101-7 Reported x May 19, 1994 <br /> ' n ,} t r r .v , ' ,rr v i • r r, ' rv~4t+xS vrJ.r�v n <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. J Fontcha J Fontcha J Fontcha J Fontcha <br /> MS/MSD <br /> Batch#: 4050296 4050296 4050295 4050296 <br /> Date Prepared 5/11/94 5/11/94 5/11/94 5/11/94 <br /> Date Analyzed 5/11/94 5/11/94 5/11/94 5/11/94 <br /> Instrument I D #: GCHP-5 GCHP-5 GCHP-5 GCHP-5 <br /> Conc. Spiked. 20 ug/L 20 ug/L 20 ug/L e0 ug/L <br /> Matrix Spike <br /> %Recovery 75 95 105 103 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 75 95 105 103 <br /> Relative% <br /> Difference. 00 00 00 00 <br /> m~,,..{:eta <br /> LCS Batch#: 3LCS051194 3LCS881194 3LCS051194 3LCS051194 <br /> Date Prepared. 5/11/94 5/11/94 5/11/94 5/11/94 <br /> Date Analyzed* 5/11/94 5/11/94 5/11/94 5/11/94 <br /> Instrument I D.#: GCHP-5 GCHP-5 GCHP-5 GCHP-5 <br /> LCS% <br /> Recovery, 83 100 107 107 <br /> % Recovery <br /> Control Limits: 71-133 72-128 72-130 71-120 <br /> Please Note <br /> OK`SEQUOIA ANALYTICAL The LCS is a control sample of known,interferent free matrix that Is analyzed using the same reagents, <br /> LAP #1271 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 /> Vickie Tague Clark <br /> Project Manager 4E32101 WAT <3� <br /> t� - <br />