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Superior Precision Analyrical, Inc. <br /> 825 Arnold Drive Suite 1 14 • Martinez California 94553 - (5 10) 229-1512 /fax (S 10) 229-1526 <br /> ANALYSIS FOR TOTAL METALS <br /> t n« n x <br /> -Quality Assurance and Control Data - Soil <br /> Laboratory Number 30141 <br /> Method Spike <br /> Compound Blank RL Recovery Limits RPD <br /> (mg/Kg) (mg/Kg) (%) (%) (%) <br /> Arsenic (As) ND<1 1 99/97 75-125 2% <br /> Barium (Ba) . ND<5 5 85/88 75-125 3%- <br /> Cadmium <br /> %Cadmium (Cd) . ND<0 5 0 . 5 95/103 75-125 8%- <br /> Chromium <br /> %Chromium (Cr) : ND<5 5 89/92 75-125 3%- <br /> Cobalt <br /> %Cobalt (Co) : ND<5 5 97/100 75-125 3%- <br /> Copper <br /> %Copper (Cu) : ND<5 5 81/85 75-125 5% <br /> Lead (Pb) ND<5 5 94/104 75-125 10% <br /> Mercury (Hg) ND<0 . 05 0 . 05 91/95 75-125 4% <br /> Nickel (Ni) ND<5 5 94/96 75-125 2% <br /> Zinc (Zn) ND<5 5 93/97 75-125 4% <br /> • <br /> Definitions <br /> ND = Not Detected 2�/z <br /> RFD = Relative Percent Difference <br /> RL = Reporting Limit <br /> mg/Kg = Parts per million (ppm) Senior Chemist <br /> QC File No 30141 Account Manager <br /> . Page 3 of 3 <br /> Certified Laboratories <br />