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41 <br /> 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 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9802909 -01 Reported Feb 27, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Beryllium Cadmium Chromium Nickel <br /> OC Batch# ME0217986010MOB ME021798601OMDB ME0217986010MOB ME021798601OMDB <br /> Analy Method EPA 6010 EPA 6010 EPA 6010 EPA 6010 <br /> Prep Method EPA 3010 EPA 3010 EPA 3010 EPA 3010 <br /> Analyst S Lebaron S Lebaron S Lebaron S Lebaron <br /> MS/MSD # 980279802 980279802 980279802 980279802 <br /> Sample Cone ND N D N D N D <br /> Prepared Date 2/17/98 2/17/98 2/17/98 2/17/98 <br /> Analyzed Date 2/18/98 2/18/98 2/18/98 2/18/98 <br /> Instrument I D # MTJA5 MTJA5 MTJA5 MTJA5 <br /> Cone Spiked 1 0 mg/L 1 0 mg/L 1 0 mg/L 1 0 mg/L <br /> Result 10 11 098 099 <br /> S % Recovery 100 110 98 99 <br /> 46 <br /> Dup Result 1 0 1 1 099 10 <br /> MSD % Recov 100 110 99 100 <br /> RPD 00 00 10 10 <br /> RPD Limit 0-20 020 020 0-20 <br /> LCS # BLK021796 BLK021798 BLK021798 BLK021798 <br /> Prepared Date 2/17/98 2/17/98 2/17/98 2/17/98 <br /> Analyzed Date 2/18/98 2/18/98 2/18/98 2/18/98 <br /> Instrument I D # MTJA5 MTJA5 MTJA5 MTJA5 <br /> Cone Spiked 1 0 mg/L 1 0 mg/L 1 0 mg/L 1 0 mg/L <br /> LCS Result 10 10 1 0 1 0 <br /> LCS % Recov 100 100 100 100 <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 /> NALYTICAL 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 /> Interference the LCS recovery is to be used to validate the batch <br /> P g Penner <br /> Pr ct Manager w*MS=Matrix Spike MSD=MS Duplicate RPD=Relative%Difference 9802909 BLA ¢1> <br />