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• s <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 /> frilly Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921.0100 <br /> ........................................ .. .. :: . .... . . <br /> Kleinfelder Client Preject ID: 20-4054-01 <br /> 2825 East Myrtle St. Matrix. Soil/Water <br /> Stockton, CA 95205 <br /> Attention: Tony Martin QC Sample Group: 8020578-0580 Reported: Mar 12, 1998::;' <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Cadmium Chromium Lead Nickel Zinc Mercury <br /> Method: EPA 6010A EPA 6010A EPA 6010A EPA 6010A EPA 6010A EPA 245.1 <br /> Analyst: S. Phillips S.Phillips S. Phillips S. Phillips S. Phillips P.Kent <br /> Concentration <br /> Spiked: 0.50 mg/L 0.50 mg/L 0.50 mg/L 0.50 mg/L 0.50 mg/L 0.0050 mg/L <br /> LCS Batch#: LCS022498 LCS022498 LCS022498 LCS022498 LCS022498 LCS022598 <br /> Date Prepared: 02/24/98 02/24/98 02/24/98 02/24/98 02/24/98 02/25/98 <br /> Date Analyzed: 02/24/98 02/24/98 02/24/98 02/24/98 02/24/98 02/25/98 <br /> Instrument I.D.#: ICP-1 ICP-1 ICP-1 ICP-1 ICP-1 HG-1 <br /> LCS <br /> Recovery: 97 98 98 99 99 95 <br /> Control Limits: 80-120% 80-120% 80-120% 80-120% 80-120% 80-120% <br /> 1 `' <br /> MS/MSD <br /> Batch#: 8020575 8020575 8020575 8020575 8020575 8020264 <br /> Date Prepared: 02/24/98 02/24/98 02/24/98 02/24/98 02/24/98 02/25/98 <br /> Date Analyzed: 02/24/98 02/24/98 02/24/98 02/24/98 02/24/98 02/25/98 <br /> Instrument I.D.#: ICP-1 ICP-1 ICP-1 ICP-1 ICP-1 HG-1 <br /> Matrix Spike <br /> % Recovery: 97 96 96 95 98 99 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery: 96 94 93 94 97 97 <br /> Relative% <br /> Difference: 1.0 2.1 3.2 1.0 1.0 2.0 <br /> Please Note: <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> SEQU A ANALYTIC A preparation and analytical methods employed for the samples. The LCS%recovery data is used for <br /> / validation of sample batch results. Due to matrix effects,the QC limits for MS/MSD's are advisory only <br /> /�jf/1/�/��✓ h���` � and are not used to accept or reject batch results. <br /> inda/C. Schneider 111 c� <br /> Project Manager/Sacramento Laboratory <br /> 8020578.KLF <24> <br />