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680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> Sequoia <br /> ` 404 N WiSet Lane Walnut Creek CA 94598 (510) 988 9600 FAX(518)988 9673 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc ' -A n 01ien't Project 1 D J +Chevron 94033 970821-F3 v <br /> 1680 Rogers Ave Matrix Liquid i <br /> `San.lose, CA 95112 n� <br /> Attention Fran Thie Work Order# 9708D46-01 Reported Sep 10, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch#. GC082997BTEX06A GC082997BTEXD6A GC082997BTEX06A GCO82997BTEX06A GCO82997BTEX06A <br /> Analy Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst R Geckler R Geckler R Geckler R Geckler R Geckler <br /> MS/MSD# 970BB9205 970BB9206 9708139205 970889205 970BB9205 <br /> Sample Conc : ND ND ND ND ND <br /> Prepared Date* 8/29/97 8/29/97 8/29/97 8/29/97 8/29/97 <br /> Analyzed Date 8/29/97 8/29/97 8/29/97 8/29/97 8/29/97 <br /> Instrument I D # GCHP6 GCHP6 GCHP6 GCHP6 GCHP6 <br /> Conc. Spiked 10pg/L long/L 10pg/L 30pg/L 60pg/L <br /> Result. 68 80 86 25 55 <br /> MS % Recovery: 68 so 86 83 92 <br />. Dup. Result 68 80 86 25 55 <br /> MSD % Recov.. 68 80 86 83 92 <br /> RPD. 00 00 00 00 0o <br /> RPD Limit: 0-25 0-25 0-25 0.25 0-25 <br /> LCS #: BLK082997 BLK082997 BLK082997 BLK082997 BLK082997 <br /> Prepared Date- 8/29/97 8/29/97 8/29/97 8/29/97 8/29/97 <br /> Analyzed Date 8/29/97 8/29/97 8/29/97 8/29/97 8/29/97 <br /> Instrument 1 D.#. GCHP6 GCHP6 GCHP6 GCHP6 GCHP6 <br /> Conc. Spiked: 10pg/L 10pg/L 10pg/L 30pg/L 60pg/L <br /> LCS Result: 81 97 10 29 65 <br /> LCS%Recov.. 81 97 100 97 108 <br /> 60-140 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70.130 70.130 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 /> ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sarnple <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 /> CoPennerManager =•MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 970BD46 BILA <3> <br /> Cyd' <br />