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1�. J <br /> D Sequoia 680 Chesapeake Drive Redwood City;CA 94063 (415) 364-9600 FAX(415) 364-9233 <br /> 404 N.Wiget lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> X1 F Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-%00 FAX(916)921-0100 <br /> Star Building Systems Client Project ID: Waste Testing <br /> 12101 E. Brandt Rd. Matrix: Solid <br /> Lockeford, CA 95237 <br /> Attention: Jeremy Ball QC Sample Group: 705-0014 Reported: May 16, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Arsenic Cadmium Chromium Lead Nickel Mercury <br /> Method: EPA 6010 EPA 6010 EPA 6010 EPA 6010 EPA 6010 EPA 7471 <br /> Analyst: K. Marchand K.Marchand K.Marchand K. Marchand K.Marchand T.Le <br /> Concentration <br /> Spiked: 50 mg/kg 50 mg/kg 50 mg/kg 50 mg/kg 50 mg/kg 0.10 mg/kg <br /> LCS Batch#: LCS050997 LCS050997 LCS050997 LCS050997 LCS050997 LCS050597 <br /> Date Prepared: 05/09/97 05/09/97 05/09/97 05/09/97 05/09/97 05/05/97 <br /> Date Analyzed: 05/09/97 05/09/97 05/09/97 05/09/97 05/09/97 05/05/97 <br /> Instrument I.D.#: ICP-1 ICP-1 ICP-1 ICP-1 ICP-1 My-1 <br /> LCS % <br /> Recovery: 94 93 95 99 95 99 <br /> Control Limits: 90-120 90-120 90-120 90-120 60-120 60-120 <br /> MS/MSD <br /> Batch#: 7050101 7050101 7050101 7050101 7050101 7050097 <br /> Date Prepared: 05/09/97 05/09/97 05/09/97 05/09/97 05/09/97 05/05/97 <br /> Date Analyzed: 05/09/97 05/09/97 05/09/97 05/09/97 05/09/97 05/05/97 <br /> Instrument I.D.#: ICP-1 ICP-1 ICP-1 ICP-1 ICP-1 My-1 <br /> Matrix Spike <br /> % Recovery: 96 94 94 97 94 93 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 93 91 90 93 91 93 <br /> Relative% <br /> Difference: 3.2 3.2 4.3 4.2 3.2 0.0 <br /> Please Note: <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> SEQU IA 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 /> G �/ and are not used to accept or reject batch results. <br /> nda C. Schnei er <br /> Project Manager/Sacramento Laboratory <br /> 7050014.SSS <2> <br />