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R' 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 /> Blaine Tech Services, Inc Client Project ID Chevron 9-8264 /971124-S1 <br /> 1680 Rogers Ave Matrix Liquid <br /> San.lose, CA 95112 <br /> Attention Fran Thle Work Order# 9711 F41-01 Reported Dec 16, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Beryllium Cadmium Chromium Nickel <br /> QC Batch# ME120597601OMDA ME120597601OMDA ME120597601OMDA ME120597601OMDA <br /> Analy Method EPA 6010 EPA 6010 EPA 5010 EPA 6010 <br /> Prep Method EPA 3010 EPA 3010 EPA 3010 EPA 3010 <br /> Analyst T Sears T Sears T Sears T Sears <br /> MS/MSD # 9711 F41 01 9711 F41 01 9711 F41 01 9711 F41 01 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 12/5/97 12/5/97 12/5/97 12/5/97 <br /> Analyzed Date 12/5/97 12/5/97 12/5/97 12/5/97 <br /> Instrument I D # MTJA5 MTJAS MTJA5 MTJA5 <br /> Conc Spiced 1 0 mg/L 1 0 mg/L 1 0 mg/L 1 0 mg/L <br /> Result 089 092 092 097 <br /> MS % Recovery 89 92 92 97 <br /> Dup Result 095 099 099 10 <br /> MSD % Recov 95 99 99 100 <br /> RPD 65 73 73 30 <br /> RPD Limit 0-20 020 020 0-20 <br /> LCS# BLK120597 BLK120597 BLK120597 BLK120597 <br /> Prepared Date 12/5/97 12/5/97 12/5/97 12/5/97 <br /> Analyzed Date 12/5/97 12/5/97 12/5/97 12/5/97 <br /> Instrument I D # MTJA2 MTJA2 MTJA2 MTJA2 <br /> Conc Spiked 1 0 mg/L 1 0 mg/(. 1 0 mg/L 10 mg/L <br /> LCS Result 090 094 094 10 <br /> LCS % Recov 90 94 94 100 <br /> 80-120 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 />. SEQUOIA ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> r` fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> q\� 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 /> Peggy Penner <br /> Project Mana er ""MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9711F41 BLA 43> <br />