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Sequoia 680 Chesapeake Drive Redwood Cats,CA 94063 (650) 364 96W FAX(650)364 9233 <br /> ,!1) 404 N Wiget Lane Walnut Creek C4 94598 (510) 988 9600 FAX(S 10)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> xf.v ✓ <br /> Blaineyam::iv)8ervices6 „lvfi <br /> uSt ♦! nv 3� vlvr� m$ <br /> Tech ,4lnc! `Ghent Project ID l�Chevron 9-8264/970827-T1 Yy Nil. A' <br /> ;1880 Rogers Ave Matrix Liquid #f <br /> San Jose, CA 95112 <br /> }Attention Fran Thie Work Order# 970BE76-01 Reported Sep 9, 1997 A <br /> QUALITY CONTROL DATA REPORT <br /> Analyte' Phenol 2-Chlorophenol 1,4-Dichloro- N-Nitroso-Di- <br /> benzene N-propylamine <br /> QC Batch#: MS0829978270EXA MS0829978270EXA MS0829978270EXA MS0829978270EXA <br /> Analy Method EPA 8270 EPA 8270 EPA 8270 EPA 8270 <br /> Prep. Method EPA 3510 EPA 3510 EPA 3510 EPA 3510 <br /> Analyst B Pitamah B Pitamah B Pitamah B Pitamah <br /> MS/MSD # 0829BS/BSD 0829BS/BSD 0829BS/BSD 0829BS/BSD <br /> Sample Conc N D N D N D N D <br /> Prepared Date 8/29/97 8/29/97 8/29/97 8/29/97 <br /> Analyzed Date. 9/2/97 9/2/97 9/2/97 9/2/97 <br /> Instrument I D # F4 F4 F4 F4 <br /> Conc Spiked 200yg/L 200 pg/L 200pg/L 200l,g/L <br /> Result 73 135 127 165 <br /> BS %% Recovery 37 68 64 83 <br /> Dup Result 80 145 130 171 <br /> BSD % Recov. 40 73 65 86 <br /> RPD 92 71 23 36 <br /> RPD Limit 0-30 0-30 0-30 0-30 <br /> Control Limits 12-110 27-123 36-97 41-116 <br /> Please Note <br /> The LCS Is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> ANALYTICAL 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 /> ner **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference <br /> 7PJec Manager Page 1 of 3 9708E76 BLA a8> <br />