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Project Number: SFE-175-0204.7 <br /> Consuftant Project Number: 203-175-32AT l <br /> Contract Number: N46CWCO244-9-X <br /> Facility Number: 5-0557 <br /> Work Order Number: x0052626 <br /> Report issue Date: May 17, 1990 <br /> Table 4 <br /> INITIAL AND CONTINUING CALIBRATION <br /> VERIFICATION STANDARDS RESULTS <br /> Organic Lead in Soil by Flame AA <br /> EPA Method 7420 <br /> Date of Analysis: 05/10/90 <br /> Initial Calibration Verification Standard <br /> Expected Result, Observed Result, Acceptability <br /> Analyte mg/L mg/L Recovery, % Limns, %1 <br /> Or anic Lead 0.600 0.591 98 80 - 120 <br /> Continuing Calibration Verification Standard <br /> Expected Result, Observed Result, Acceptability <br /> Analyte mg/L mg/L Recovery, % Limits, %1 <br /> Organic Lead 0.800 0.803 100 80 - 120 <br /> 1 = Acceptability limits are derived from the 99% confidence interval of all samples during <br /> the previous quarter. <br /> Table 4a <br /> INITIAL AND CONTINUING CALIBRATION <br /> VERIFICATION STANDARDS SOURCE <br /> Organic Lead in Soil by Flame AA <br /> EPA Method 7420 <br /> Initial Calibration Verification Standard <br /> Analyte Lot Number Source <br /> Organic Lead 4718 KBHM Mallinckrodt <br /> Continuing Calibration Verification Standard <br /> Analyte Lot Number Source <br /> Organic Lead AK215 Spectrum <br /> 1 <br /> GTEL Concord,CA Page 4 of 6 <br /> D00526213.1DOC <br /> GT E L <br /> ENVIRON Mf NTAI <br /> I,A BORAT0 WS, INC <br />