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Sequoia 680 Chesapeake Dave Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> s <br /> X1,7 Analytical 819 Sinker Avenue,Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-8632/970605-K1 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9706358-02-03 Reported Jun 20, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch#. GC061197BTEX2IA GCO61197BTEX21A GCO61197BTEX21A GCO61197BTEX21A GC-061197BTEX21A <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 D Jirsa D Jirsa D Jirsa D Jirsa D Jirsa <br /> MS/MSD # 970613909 970613909 970613909 970613909 970613909 <br /> Sample Cone : N D N D ND N D ND <br /> Prepared Date: 6/11/97 6/11/97 6/11/97 6/11/97 6/11/97 <br /> Analyzed Date. 6/11/97 6/11/97 6/11/97 6/11/97 6/11/97 <br /> Instrument I D #. GCHP21 GCHP21 GCHP21 GCHP21 GCHP21 <br /> Cone Spiked 10lrg/L 10,ug/L 10pg/L 30pg/L 60yg/L <br /> Result 91 93 93 28 61 <br /> •MS % Recovery: 91 93 93 93 102 <br /> Dup Result- 90 91 91 27 58 <br /> MSD % Recov • 90 91 91 90 97 <br /> RPD, 11 22 22 36 50 <br /> RPD Limit 0.25 0-25 0-25 0-25 0-25 <br /> LCS #: BLK061197 BLK061197 BLK061197 BLK061197 BLK061197 <br /> Prepared Date- 6/11/97 6/11/97 6/11/97 6/11/97 6/11/97 <br /> Analyzed Date 6/11/97 6/11/97 6/11/97 6/11/97 6/11/97 <br /> Instrument I D # GCHP21 GCHP21 GCHP21 GCHP21 GCHP21 <br /> Cone Spiked. 10Ng/L 10pg/L 10Ng/L 30Ng/L 60 jig/L <br /> LCS Result 97 10 11 33 66 <br /> LCS % Recov : 97 100 110 110 110 <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 /> �EQIJIOIA 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 /> �— Tom_ linterference,the LCS recovery is to be used to validate the batch <br /> Peggy Penner <br /> Protect Manager "•MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9706858 BLA a3> <br />