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Protect Number: SF1-175-0204.72 <br /> Consultant Project Number: 203-175-3291 <br /> Contract Number: N46CWCO244-9-X <br /> Facility Number: 9-0557 <br /> Wor*Order Number; D004129 <br /> Report Issue Date: April 10, 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: 04/06/90 <br /> Initial Calibration Verification Standard <br /> Expected Result, Observed Result, I Acceptability <br /> Analyte mg/L mg/L Recovery, % Limits, %, <br /> Organic Lead 1.2 1.277 106 80- 120 <br /> Continuing Calibration Verification Standard <br /> Expected Result, Observed Result, I Acceptability <br /> Analyte mg/L mg/L I Recovery, % Limits, 961 <br /> Organic Lead 1 1.2 1.187 99 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 AK215 SPECTRUM <br /> Continuing Calibration Verification Standard <br /> Analyte Lot Number Source <br /> Orcianic Lead 4718KBHM MALLINCKRODT <br /> i <br /> GTEL Concord,CA Page 4 of 5 <br /> ' °00412.9DOC GTELR I <br /> LADOQAIORIES. INC <br />