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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (650) 364-9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (530) 988 9600 FAX(51o)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Gettler Ryan/Geostrategles Client Project ID Unocal SS#0187, 280045 85 m ` <br /> 6747 Sierra Court, Ste J Matrix Liquid r <br /> Dublin, CA 94568 <br /> Attention Deanna Harding Work Order# 9803523-02-06, 9803524-07-10 Reported Mar 17, 1998 = <br /> Ferrous Iron <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Beryllium Cadmium Chromium Nickel <br /> QC Batch#- ME031198601OMDB ME031198501OMDB ME031198601OMDB ME031198601OMDB <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 LaBarron S LaBarron S LaBarron S LaBarron <br /> MS/MSD # 980352303 980352303 980352303 980352303 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 3/11/98 3/11/98 3/11/98 3/11/98 <br /> Analyzed Date 3/11/98 3/11/98 3/11/98 3/11/98 <br /> Instrument I D # MTJA5 MTJA5 MTJA5 MTJA5 <br /> Conc Spiked t 0 mg/L 1 0 mg/L 1 0 mg/L 1 0 mg/L <br /> Result 10 11 10 10 <br /> �S % Recovery 100 110 100 100 <br /> Dup Result 10 10 098 098 <br /> MSD % Recov 100 100 98 98 <br /> RPD 00 95 20 20 <br /> RPD Limit 0-20 0-20 0-20 0-20 <br /> LCS # BLK031198 BLK031198 BLK031198 BLK031198 <br /> Prepared Date 3/11/98 3/11/98 3/11/98 3/11/98 <br /> Analyzed Date 3/11/98 3/11/98 3/11/98 3/11/98 <br /> Instrument I D # MTJA5 MTJA5 MTJA5 MTJA5 <br /> Conc Spiked 1 0 mg/L 10 mg/L 1 0 mg/L 10 mg/L <br /> LCS Result 10 10 10 10 <br /> LCS % Recov 100 100 100 100 <br /> 80-120 80-120 80-120 80-120 <br /> LCS 8x120 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 /> Ir6C'JectManager <br /> YTICAL 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 /> ory interference,tha LCS recovery is to be used to validate the batch <br /> **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference <br /> 9803523 GET <8> <br /> .f74, <br />