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A~Z Laboratories, Inc. <br />2773 Downhill Drive Steamboat Springs, CO 80487 <br />(800) 334-5493 • - - • - <br />~ - • • <br />Brown and Caldwell ACZ Project ID: L45505 <br />.- 1 .. <br />L4550S06 WG171610 Calcium, dissolved M200.7 ICP M4 One spike rewvery was outside of the method limits; the <br /> duplicate spike and the method control recoveries were <br /> within the method limits. <br />WG772045 Mercury, dissolved M7631, Atomic Fluorescence MA One spike recovery was outside of the method limits; the <br /> duplicate spike and the method control recoveries were <br /> within Ne method limits. <br />WG171393 Residue, Filterable (TDS) @180C M160.1 -Gravimelric BA Target analyte detected in method blank at or above <br /> method reporting limit. Concentration found in the sample <br /> was 20 times above the wncentmtion found in the method <br /> blank. <br />WG772057 Sulfate M375.3 -Gravimelric RA Relative Pement Difference (RPD) exceeded limit; sample <br /> concentrations are less than 10z the MDL. <br />L4550S07 WG172045 Mercury, dissolved M1631, Atomic Fluorescence M4 One spike recovery was outside of the method limits; the <br /> duplicate spike and the method control recoveries were <br /> within the method limits. <br />EXTQUAL.11.20.02.01 <br />L45505: Page 27 of 35 <br />