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Superior Precisial 7 ,Analytical, lrnc_ <br /> PO Sox 1 545 . Martinez California 94553 • {51 OJ 229-1590/fax (5 10) 229-0916 <br /> xi.owuY ,wev cu <br /> ANALYSIS FOR SOLUBLE METALS <br /> Quality Assurance and Control Data - Extract <br /> Laboratory Number 88954 <br /> Average <br /> Method Spike <br /> Compound Blank PQL Recovery Limits RPD <br /> (mg/L) tm5/L) (%6 M (%) <br /> Y <br /> Cadmium (Cd) ND<0 . 5 0 5 980 75-125 1� <br /> Chromium (Cr) ND<0 . 5 0 5 99% 75--125 Oo <br /> Copper (Cu) ND<O 5 0 5 1.040-. 75-125 1% <br /> Lead (Pb) ND<O 5 0 5 102 75-125 1% <br /> Nickel (Ni) • ND<O 5 0 5 960-. 75-125 1%- <br /> Zinc <br /> oZinc (Zn) . ND<O S 0 5 1060-. 75-125 to <br /> r <br /> Definitions <br /> ND = Not Detected RPD = Rel tive P ent Difference <br /> PQL = Practical Quantitation Limit <br /> QC File No 88954 <br /> Senior Analyst <br /> Page 3 of 3 <br /> 0 <br /> Certified Laboratories <br />