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i Sequoia 690 C�esapeake Drive Redwood City,CA 94063 (415) 364.9600 FAX(415) 3649233 <br /> 404 N.Wiget Lane Walnut Geek,CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> VC0 Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> Star Bldg. Systems Client Project ID WasteTesting <br /> 12101 E. Brandt Rd. Matrix: Liquid/Solid <br /> Lockeford, CA 95237 <br /> Attention: Jeremy Ball QC Sample Group: 7050967-0968 Reported: Jun 5, 1997:';: <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE STLC STLC <br /> Copper Lead Cadmium Chromium Lead Nickel Zinc <br /> Method: EPA 6010 EPA 6010 EPA 6010 EPA 6010 EPA 6010 EPA 6010 EPA 6010 <br /> Analyst: K. Marchand K.Marchand K.Marchand K. Marchand K.Marchand K.Marchand K.Marchand <br /> Concentration <br /> Spiked: 10 mg/L 10 mg/L 50 mg/kg 50 mg/kg 50 mg/kg 50 mg/kg 50 mg/kg <br /> LCS Batch#: LCS053097 LCS053097 LCS060397 LCS060397 LCS060397 LCS060397 LCS060397 <br /> Date Prepared: 05/30/97 05/30/97 06/03/97 06/03/97 06/03/97 06/03/97 D6/03/97 <br /> Date Analyzed: 06/02/97 06/02/97 06/03/97 06/03/97 06/03/97 06/03/97 06/03/97 <br /> Instrument I.D.#: ICP-1 ICP-1 ICP-1 ICP-1 ICP-1 ICP-1 ICP-1 <br /> LCS % <br /> Recovery: 101 102 98 100 102 97 97 <br /> Control Limits: 80-120 80-120 80-120 80-120 80-120 80-120 80-120 <br /> MS/MSD <br /> Batch #: 7050967 7050967 7051022 7051022 7051022 7051022 7051022 <br /> Date Prepared: 05/30/97 05/30/97 06/03/97 06/03/97 06/03/97 06/03/97 06/03/97 <br /> Date Analyzed: 06/02/97 06/02/97 06/03/97 06/03/97 06/03/97 06/03/97 06/03/97 <br /> Instrument I.D.#: ICP-1 ICP-1 ICP-1 ICP-1 ICP-1 ICP-1 ICP-1 <br /> Matrix Spike <br /> % Recovery: 100 97 81 86 103 76 90 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 100 97 81 79 83 69 76 <br /> Relative% <br /> Difference: 0.0 0.0 0.0 8.5 22 9.7 16 <br /> Please Note: <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL 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 OC limits for MS/MSD's are advisory only <br /> Apin <br /> and are not used to acce t or reject batch results. <br /> C. Schnei er ct Manager/Sacramento Laboratory <br /> 7050967.SSS <3> <br />