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1 0 <br /> Sequoia <br /> 0 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 /> ' Kleinfelder Client Project ID: 20 4054-01.E01 <br /> 2825 East Myrtle St. Matrix: Soil/Water <br /> Stockton, CA 95205 <br /> Attention: Tony Martin QC Sample Group: 8030426-0428XXXXXXXX , 0430 Reported: Mar 26, 1998.... <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Arsenic Cadmium Chromium Lead Zinc Diesel Mercury <br /> Method: EPA 200.7 EPA 200.7 EPA 200.7 EPA 200.7 EPA 200.7 DHS LUFT EPA 245.1 <br /> ' Analyst: M.C. M.C. M.C. M.C. M.C. C. Lee S.P./P.K. <br /> Concentration <br /> Spiked: 0.50 mg/L 0.50 mg/L 0.50 mg/L 0.50 mg/L 0.50 mg/L 12.5 mg/kg 0.0050 mg/L <br /> ' LCS Batch#: LCS031798 LCS031798 LCS031798 LCS031798 LCS031798 LCS031698 LCS031298 <br /> Date Prepared: 03/17/98 03/17/98 03/17/98 03/17/98 03/17/98 03/16/98 03/12/98 <br /> Date Analyzed: 03/20/98 03/20/98 03/20/98 03/20/98 03/20/98 03/17/98 03/13/98 <br /> Instrument I.D.#: ICP-1 ICP-1 ICP-1 ICP-1 ICP-1 GCHP-3B HG-1 <br /> LCS % <br /> Recovery: 97 98 96 98 99 84 97 <br /> Control Limits: 80-120% 80-120% 80-120% 80-120% 80-120% 60-140% 80-120% <br /> MS/MSD <br /> Batch#: 8030556 8030556 8030556 8030556 8030556 8030547 8030430 <br /> Date Prepared: 03/17/98 03/17/98 03/17/98 03/17/98 03/17/98 03/16/98 03/12/98 <br /> Date Analyzed: 03/20/98 03/20/98 03/20/98 03/20/98 03/20/98 03/17/98 03/13/98 <br /> Instrument I.D.#: ICP-1 ICP-1 ICP-1 ICP-1 ICP-1 GCHP-313 HG-1 <br /> Matrix Spike <br /> % Recovery: 96 97 94 94 100 74 94 <br /> Matrix Spike <br /> ' Duplicate% <br /> Recovery: 95 96 94 93 97 94 96 <br /> 1 Relative% <br /> Difference: 1.0 1.0 0.0 1.1 3.0 24 2.1 <br /> ' Please Note: <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> SEQU IA ANALYTICAL preparation and analytical methods employed for the samples. The LCS%recovery data is used for <br /> r validation of sample batch results. Due to matrix effects,the QC limits for MS/MSD's are advisory only <br /> �/���/' and are not used to accept or reject batch results. <br /> Inda C. Sc nelder <br /> Project Manager/Sacramento Laboratory <br /> 8030426.KLF <30> <br />