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i <br /> pace, REPORT OF LABORATORY ANALYSIS <br /> TRE ASSURANCE OF QUALITY <br /> ks. Jacqueline Doub QUALITY CONTROL DATA January 30, 1992 <br /> Page 5 PACE Project Number: 420121507 <br /> Client Reference: Exxon 7-0137 <br /> fLead (EPA Method 7421, Graphite Furnace) <br /> Batch: 70 09339 <br /> Samples: 70 0007585, 70 0007593, 70 0007607 <br /> METHOD BLANK: <br /> Method <br /> Parameter Units MDL Blank <br /> Lead Method 7421, Graphite Furnace mg%-F 0.003 HD <br /> LABORATORY CONTROL SAMPLE AND CONTROL SAMPLE DUPLICATE. <br /> Reference Dupl <br /> Parameter Units MDL Value Recv Recv RPD <br /> Lead Method 7421, Graphite Furnace mg/L 0.003 0 02 105% 105% 0% <br /> MDL Method Detection Limit <br /> RPD Relative Percent Difference <br /> I <br /> 11 Dgtai Biwa Offices Serving Minneapolis Miniresoto Charlotte North Carolina An Equal Opportunity Employer <br /> Novato CA 94949 Tempe,Florida Asheville,North Carolina <br /> TEL 415 883 6100 Iowa City Iowa New York New York <br /> FAX 415 883 2673 San Franeutco California Pittsburgh,Pennsylvania <br /> Kansas City Misseun Denver Colorado <br /> Las Angeles Calfornia <br />