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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> • <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-8264/980609-J1 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order # 9806003-01 Reported Jun 25, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Beryllium Cadmium Chromium Nickel <br /> OC Batch# ME061298601OMDB ME061298601OMDB ME061298601OMDB ME061298601OMDB <br /> Analy Method EPA 6010 EPA 6010 EPA 6010 EPA 6010 <br /> Prep Method EPA 3010 EPA 3010 EPA 3010 EPA 3010 <br /> Analyst C Caoile C Caoile C Caoile C Caoile <br /> MS/MSD # 980660702 980660702 980660702 980660702 <br /> Sample Conc NO N D 0 018 NO <br /> Prepared Date 6/12/98 6/12/98 6/12/98 6/12/98 <br /> Analyzed Date 6/12/98 6/12/98 6/12/98 6/12/98 <br /> Instrument I D # MTJA5 MTJA5 MTJA5 MTJA5 <br /> Conc Spiked 1 0 mg/L 1 0 mg/L 1 0 mg/L 1 0 mg/L <br /> Result 11 11 10 10 <br /> MS % Recovery 110 110 100 100 <br /> 10 Dup Result 10 10 10 099 <br /> MSD % Recov 100 100 100 99 <br /> RPD 95 95 00 10 <br /> RPD Limit 0-20 0-20 0-20 0-20 <br /> LCS # BLK061298 BLK061298 BLK061298 BLK061298 <br /> Prepared Date 6/12/98 6/12/98 6/12/98 6/12/98 <br /> Analyzed Date 6/12/98 6/12/98 6/12/98 6/12/98 <br /> Instrument I ❑ # MTJA5 MTJA5 MTJA5 MTJA5 <br /> Conc Spiked 1 0 mg/L 1 0 mg/L 1 0 mg/L 1 0 mg/L <br /> LCS Result 10 10 10 10 <br /> LCS % Recov 100 100 100 100 <br /> 60-120 80-120 80-120 80-120 <br /> LCS 80-120 80-120 80-120 80-120 <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 /> VctManraQer' <br /> TICAL preparation,and analyticaE 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 /> **MS=Matrix Spike, MSO=MS Duplicate, APO Relative% Difference 9806003 BLA <6> <br />