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Sequoia 680 Chesapeake Drive Redwood City, CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> !� �+ 404 N Wi8et Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> lip- <br /> Enviros Client Project ID Shell 1267 Country Club, Stick <br /> 270 Perkins Ave Matrix Solid <br /> Sonoma, CA 95476 <br /> ,Attention Joe Neely Work Order# 9704512 04, 05 <br /> Reported Apr 22, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 1,1-Dichloro- Trichloro- Chloro- <br /> ethene ethene Benzene <br /> OC 13atch# GC0414978010EXA GC0414978010EXA GC0414978010EXA <br /> Analy Method. EPA 8010 EPA 8010 EPA 8010 <br /> Prep. Method- EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: R Bou-Salman R Bou-Salman R Bou-Salman <br /> MS/MSD # 970457808 970457808 970457808 <br /> Sample Cone . N D 15 N D <br /> Prepared Date: 4/14/97 4/14/97 4/14/97 <br /> Analyzed Date 4/16/97 4/16/97 4/16/97 <br /> Instrument I D #' GCHP8 GCHP8 GCHP8 <br /> Cone. Spiked: 25yg/Kg 25yg/K9 25 Pg/Kg <br /> Result. 25 34 24 <br /> MS % Recovery 100 76 96 <br /> Dup. Result: 24 34 22 <br /> MSD % Recov. 96 76 88 <br /> RPD* 41 00 87 <br /> RPD Limit: 0-25 0-25 0-25 <br /> LCS#: BLK0414978S BLK041497BS BLK041497BS <br /> Prepared Date 4/14/97 4/14/97 4/14/97 <br /> Analyzed Date- 4/15/97 4/15/97 4/15/97 <br /> Instrument LD # GCHP8 GCHP8 GCHP8 <br /> Cone. Spiked. 25 pg/Kg 25 Ng/Kg 25i19IK9 <br /> LCS Result 28 25 27 <br /> LCS % Recov : 112 100 108 <br /> 60-140 60-140 60-140 <br /> LCS 65-135 70-130 70-130 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> SEQUOIA A LYTICAL 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 fail within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> regory **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative% Difference <br /> 9704512 EEE5 <br /> Project Manager <br /> - -- <br />