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n superior Precision Ana/yticai, Inc <br /> u825 Arnold Drive, Suite 114 Martinez, California 94553 (510) 229- 1512 / fax (510) 229- 1526 <br /> ANALYSIS FOR CADMIUM , CHROMIUM , LEAD , NICKEL , & ZINC <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) ( o ) ( o ) M ) <br /> Cadmium ( Cd ) : ND< 0 . 5 0 . 5 86 / 86 75 - 125 0 % <br /> Chromium ( Cr ) : ND < 5 5 86 / 86 75 - 125 Oe <br /> Lead ( Pb ) : ND < 5 5 80 / 83 75 - 125 496 <br /> Nickel ( Ni ) : ND < 5 5 82 / 89 75 - 125 806 <br /> Zinc ( Zn ) : ND < 5 5 84 / 90 75 - 125 70 <br /> Definitions : <br /> ND = Not Detected <br /> RPD = Relative Percent Difference <br /> RL = Reporting Limit f� S <br /> mg/ Kg = Parts per million ( ppm ) Senior Chemist <br /> QC File No . 15540 Account Manager <br /> Page 3 of 3 <br /> Certified Laboratories <br />