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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> :I 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)986 9673 <br /> Analytical 819 Stnker Avenue,Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-8632 j 970605-K1 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9706358-01, 04-06 Reported Jun 20, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> OC Batch#: GCO61297BTEX17A GCO61297BTEX17A GCO61297BTEX17A GCO61297BTEX17A GCO61297BTEX17A <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 A.Miraftab A.Miraftab A Miraftab X Miraftab A Miraftab <br /> MS/MSD # 970613910 970613910 970613910 970613910 970613910 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date: 6/12/97 6/12/97 6/12/97 6/12/97 6/12/97 <br /> Analyzed Date: 6/12/97 6/12/97 6/12/97 6/12/97 6/12/97 <br /> Instrument I D #- GCHP17 GCHP17 GCHP17 GCHP17 GCHP17 <br /> Conc Spiked 10pg/L 10pg/L 10pg/L 30pg/L 60yg/L <br /> Result 10 99 99 30 63 <br /> •IVIS % Recovery. 100 99 99 100 105 <br /> Dup Result: 10 9 9 99 30 63 <br /> MSD % Recov.: 100 99 99 100 105 <br /> RPD: 00 00 00 00 00 <br /> RPD Limit. 0-25 0-25 0-25 0-25 0-25 <br /> LCS#: BLK061297 BLK061297 BLK061297 BLK061297 BLK061297 <br /> Prepared Date: 6/12/97 6/12/97 6/12/97 6/12/97 6/12/97 <br /> Analyzed Date: 6/12/97 6/12/97 6/12/97 6/12/97 6/12/97 <br /> Instrument I D #: GCHP17 GCHP17 GCHP17 GCHP17 GCHP17 <br /> Conc Spiked- 10pg/L 10pg/L 10pg/L 30pg/L 60pg/L <br /> LCS Result 9 6 95 96 29 61 <br /> LCS % Recov ' 96 95 96 97 102 <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 /> EOU!OIA 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 /> 7L, the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> 4-- �L— interference,the LCS recovery is to be used to validate the batch <br /> Peggy Penner <br /> Project Manage "'MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9706358 BLA a2n <br />