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i <br /> pacee <br /> REPORT OF LABORATORY ANALYSIS <br /> THE ASSURANCE OF QUALITY <br />;R)s Jacqueline Doub QUALITY CONTROL DATA May 07, 1992 <br /> Page 5 PACE Project Number 420423506 <br /> Client Reference Exxon 7-0137 <br /> Lead (EPA Method 7421 , Graphite Furnace) <br /> Batch 70 12112 <br /> Samples 70 0084695, 70 0084709, 70 0084717 <br /> METHOD BLANK <br /> Method <br /> Parameter Units MDL Blank <br /> Lead Method 7421 , Graphite Furnace mg/L 0 003 ND <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 0 020 115% lis% 01. <br /> MDL Method Detection Limit <br /> D Not detected at or above the MDL <br /> D Relative Percent Difference <br /> 11 Digital Drive Offices Serving Minneapolis Minnesota Charlotte North Carolina An Equal Opportunity Employer <br /> Novato CA 94949 Tampa Florida Ashavdle North Carolina <br /> TEL 415 883 8100 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 />