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SuperiorPrecision ,4na6vtica ,p Inc_ <br /> 825 Arnold Drive Suite 1 14 ■ Martinez California 94553 ■ (5 10) 229-1512 / fax (510} 229-1526 <br /> iANALYSIS FOR CADMIUM, CHROMIUM, LEAD, NICKEL, & ZING <br /> Quality Assurance and Control Data - Soil <br /> Laboratory Number 14713 <br /> Average <br /> Method Spike <br /> Compound Blank PQL Recovery Limits RPD <br /> (mg/Kg) (mg/K9') (-0. ) (%r) (%;) <br /> Cadmium (Cd) . ND¢O 5 0 5 1000 75-125 30 <br /> Chromium (Cr) - ND<5 5 954 75-125 3a <br /> Lead (Pb) ND<5 5 105%r 75-125 306 <br /> Nickel (Ni) ND<5 5 980 75-125 2% <br /> Zinc (Zn) ND<5 5 990-. 75-125 40 <br /> Definitions <br /> ND = Not Detected RPD = Relative Percent Difference <br /> PQL = Practical. Quantitation Limit <br /> N <br /> QC File o 89761 <br /> Senior Chemist <br /> Account Manager <br /> 0 Page 3 of 3 <br /> Certified Laboratories <br />