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I N C O R P 11 R A T E 0 REPORT OF LABORATORY ANALYSIS <br /> THE ASSURANCE OF DUALITY <br /> 0 <br /> Mr James Jacobs QUALITY CONTROL DATA June 16, 1992 <br /> Page 19 PACE Project Number 420605525 <br /> Client Reference Exxon 7-3330 (C&M) <br /> Selenium (EPA Method 7740, Furnace AAS) <br /> Batch 70 13057 <br /> Samples 70 0159040 <br /> METHOD BLANK <br /> Method <br /> Parameter Units MDL Blank <br /> Selenium (EPA Method 7740, Furnace AAS) mg/kg wet 0 5 ND <br /> LABORATORY CONTROL SAMPLE AND CONTROL SAMPLE DUPLICATE <br /> Reference Dupl <br /> Parameter Units MDL Value Recv Recv RPD <br /> Selenium (EPA Method 7740, Furnace AAS) mg/kg wet 5 50 86% 88% 2% <br /> MDL Method Detection Limit <br /> Not detected at or above the MDL <br /> Relative Percent Difference <br /> 11 Digital Drive offices Serving Minneapolis Minnesota Charlotte North Carolina An Equal Opportunity Employer <br /> Novato CA 94949 Tampa Florida Asheville North Carolina <br /> TEL 415 883 6100 Iowa City Iowa New York New York <br /> FAX 415 883 2673 San Francisco California Pittsburgh Pennsylvania <br /> Kansas City Missouri Denver Colorado <br /> Los Angeles California <br />