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Superior Precision Anatvricai, Inc. <br /> A 825 Arnold Drive, Suite 114 Martinez, California 94553 (510) 229- 1512 / fax (510( 229- 1526 <br /> ANALYSIS FOR TOTAL LEAD <br /> Quality Assurance and Control Data - Soil <br /> Laboratory Number 15540 <br /> Method Spike <br /> Compound Blank RL Recovery Limits RPD <br /> ( mg/ Kg ) ( mg /Kg ) M M <br /> TOTAL LEAD : ND < 5 5 80 / 83 75 - 125 4 % <br /> 3 <br /> 1� <br /> l <br /> i <br /> ii <br />'I <br /> i� <br /> i <br /> Definitions : <br /> ND = Not Detected <br /> RPD = Relative Percent Difference <br /> RL = Reporting Limit <br /> mg/Kg = Parts per million ( ppm ) Senior Chemist <br /> QC File No . 15540 Account Manager <br /> Page 5 of 5 <br /> Certified Laboratories <br />