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Q Sequoia 680 Chesapeake Drive Redwood Ciry, CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 986 96W FAX(510)988 9673 <br /> Analytical 819 Sinker 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 f. <br /> 6747 Sierra Court, Ste J Matrix Liquid <br /> Dublin, CA 94568 <br /> Attention Deanna Harding Work Order # 9803523-02-06, 9803524-07-10 Reported Mar 17, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Beryllium Cadmium Chromium Nickel <br /> QC Batch# ME031198601OMDA ME031198601OMDA ME031198601OMDA ME031198601OMDA <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 # 980358301 980358301 980358301 980358301 <br /> Sample Conc N D N 0 0 018 0 050 <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 1 0 mg/L 1 0 mg/L 1 0 mg/L <br /> Result 11 13 11 12 <br /> 4VS % Recovery 110 130 110 120 <br /> Dup Result 11 13 1 1 1 1 <br /> MSD % Recov 110 130 110 110 <br /> RPD 00 00 00 87 <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 10 mg/L 1 0 mg/L 10 mg/L 1 0 mg/L <br /> LCS Result 11 11 11 11 <br /> LCS % Recov 110 110 110 110 <br /> 90-120 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 /> 7roject <br /> QUOIA 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 ft <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 /> gory <br /> Manager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9803523 GET <7a <br />