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L <br /> Sequoia680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 404!',l W,get Lane Walnut Creek,CA 94598 (510) 988 9600 FAX (510) 988 9673 <br /> Analytical 819 Stinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9640 FAX(916) 921 0100 <br /> Blame Tech Services, Inc Client Project ID Chevron 9-4183/960222-L1 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9602D89-03 Reported Feb 27, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 2,4-Dinitro- PentachlOrO- Pyrene <br /> toluene phenol <br /> QC Batch# MS0222968270EXA MS0222958270EXA MS0222968270EXA <br /> Analy Method EPA 8270 EPA 8270 EPA 8270 <br /> Prep Method EPA 3510 EPA 3510 EPA 3510 <br /> Analyst B Pitamah B Pitamah B Pitamah <br /> MS/MSD # BLK022296 BLK022296 BLK022296 <br /> Sample Conc N D N D N D <br /> Prepared Date 2/22/96 2/22/96 2/22/96 <br /> Analyzed Date 2/22/96 2/22/96 2/22/96 <br /> instrument I D # F4 F4 F4 <br /> Conc Spiked 200ug/L 20aug/L 200 pg/L <br /> Result 140 150 160 <br /> MS %Recovery 70 75 80 <br /> Dup Result 150 160 160 <br /> MSD % Recov ,, 75 80 80 <br /> RPD 69 65 00 <br /> RPD Limit, 0-50 0-50 0-50 <br /> LCS # - <br /> Prepared Date - - <br /> Analyzed Date - - <br /> instrument I D # - - - <br /> Conc Spiked - - <br /> LCS Result, - <br /> LCS % Recov <br /> --MS/MSU-- <br /> LCS <br /> LCS 40.130 30-110 55-115 <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 /> SWctanager <br /> 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 fall within specified control limits due to matrix <br /> interference,the LCS recovery ss to be used to vandaie the batch <br /> P "*MS=Matrix Spike, MSD-MS Duplicate, RPD-Relative 96 Difference <br /> PPage 3 of 3 9602D89 BLP' i6' <br />