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Superior Precision Analytical, /rnc. <br /> 825 Arnold Drive. Suite 1 14 ■ Martinez. California 94553 ■ 1510 229-1512 /fax (5101229-1526 <br /> ANALYSIS FOR SOLUBLE CAM 17 METALS <br /> Quality Assurance and Control Data - Extract <br /> Laboratory Number 30505 <br /> Method Spike <br /> Compound Blank RL Recovery Limits RPD <br /> (mg/L) (mg/L) 0 ) ( % ) (%) <br /> Antimony (Sb) : ND<0 . 2 0 . 2 103/106 75-125 3% <br /> Arsenic (As ) : ND<0. 2 0 . 2 113/113 75-125 0% <br /> Barium (Ba) : ND<0 . 5 0 .5 96/99 75-125 3% <br /> Beryllium (Be) : ND<0. 05 0 . 05 93/96 75--125 3% <br /> Cadmium (Cd) : ND<0 . 05 0 . 05 103/103 75-125 0% <br /> Chromium (Cr) : ND<0 . 5 0 .5 94/94 75-125 0% <br /> Cobalt (Co) : ND<0 . 5 0 . 5 106/107 75-125 1% <br /> Copper (Cu ) : ND<0 . 5 0 .5 99/97 75-125 2% <br /> Lead (Pb) : ND<0.5 0 . 5 106/105 75-125 1% <br /> Mercury (Hg) : ND< . 006 . 006 87/95 75-125 9% <br /> Molybdenum (Mo) : ND<0. 5 0 . 5 102/102 75-125 0% <br /> Nickel (Ni) : ND<0 . 5 0 . 5 99/100 75-125 1% <br /> S enium (Se) : ND<0 . 5 0 . 5 104/106 75-125 2% <br /> er (Ag) : ND<0 . 5 0 . 5 98/98 75-125 0% <br />' allium (T1 ) : ND<0 . 1 0 . 1 101/104 75-125 3% <br /> Vanadium (V) : ND<0 . 5 0 . 5 109/112 75-125 3% <br /> Zinc (Zn) : ND<0 . 5 0 . 5 98/98 75-125 0% <br />)ef initions : <br /> 1D = Not Detected <br />:PD = Relative Percent Difference <br />:L = Reporting Limit <br /> 1 L = Parts per million (ppm) Senior Chemist <br /> ile No. 305Q5 Account Manager <br /> Page 3 of 3 <br /> Ce�tifred Laboratories <br />