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I superior Precision Anaiyticai, inc. <br /> 825 Arnold Drive, Suite 1 14 Martinez, California 94553 (510) 229- 1512 / fax (510) 229- 1526 <br /> ANALYSIS FOR TOTAL LEAD <br /> Quality Assurance and Control Data - Water <br /> Laboratory Number 15540 <br /> Method Spike <br /> Compound Blank RL Recovery Limits RPD <br /> ( mg /L ) ( mg/ L ) ( 8 ) M ( 8 ) <br /> 89 75 - 125 148 <br /> 0 1 102 <br /> TOTAL LEAD : ND < 0 . 1 / <br /> I <br /> i <br /> Def initions : <br /> ND = Not Detected <br /> RPD = Relative Percent Difference <br /> RL = Reporting Limit <br /> mg/ L = Parts per million ( ppm ) <br /> QC File No . 15540 <br /> Page 4 of 5 <br /> Certified Laboratories <br />;a. <br />