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' %../ <br /> Project Number: SFB-175-0204.72 <br /> Consultant Project Number: 203-175-3284 <br /> Contract Number: N46CWCO244-9-X <br /> Facility Number: 9-0342 <br /> Work Order Number: D002238 <br /> Report Issue Date: February 15, 1990 <br /> 1%we <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: 02/13/90 <br /> initial Calibration Verification Standard <br /> Expected Result, observed Result, Acceptability <br /> Analyte mg/L mg/L Recovery, % Limits, %1 <br /> organic Lead 0.600 1 0.638 1 106 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 0.814 102 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 /> r 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 3791 NCB <br /> Continuing Calibration Verification Standard <br /> Analyte Lot Number Source <br /> Organic Lead AK215 SPECTRUM <br /> GTEL Concord, CA Page 5 of 6 <br /> D002238.DOG � GTEL <br /> ENVIRONMENTAL <br /> LABORATORIES, INC. <br />