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~CZ Laboratories, Inc. <br />2773 Downhill Drive Steamboat Springs, CO 80487 (800) 334-5493 <br />L42643-01 WG1614fi9 Magnesium, dissolved M200.71CP 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 /> WG162370 Nitrogen, ammonia M360.1 -Automated Phenate RA Relative Percent Difference (RPD) exceeded IimiL sample <br /> concentrations are less than 10x the MDL. <br />L42643-02 WG161469 Magnesium, dissolved M200.7 ICP tvt4 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 /> WG162370 Nitrogen, ammonia M350.1 -Automated Phenate RA Relative Percent Difference (RPD) exceeded limit; sample <br /> concentrations are less than 10x the MDL. <br />L42643-03 WG161469 Magnesium, dissolved M200.7 ICP 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 /> WG162370 Nitrogen, ammonia M350.1 -Automated Phenate RA Relative Percent Difference (RPD) exceeded limit; sample <br /> concentrations are less than 1px the MDL. <br />L42643-04 WG161469 Magnesium, dissolved M200.7 ICP M4 One spike recovery was outside of the method limits; the <br /> duplicate spike and the method control rewveries were <br /> within the method limits. <br /> WG162370 Nitrogen, ammonia M350.1 -Automated Phenate RA Relative Percenf DiRerence (RPD) exceeded limit; sample <br /> concentrations are less than 10x the MDL. <br />L42fiA3-06 WG161469 Magnesium, dissolved M200.7 ICP AM 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 /> WG161104 NitratelNlldte as N, dissolved M353.2 -Automated Cadmium AR Matrix spike recovery was low, the method control sample <br /> Reduction rewvery was acceptable. <br /> WG162370 Nitrogen, ammonia M350.1 -Automated Phenate RA Relative Percent DiRerence (RPD) exceeded limit sample <br /> concentrations are less than 10x the MDL. <br />EXTCIUAL.11.20.02.01 <br />L42643: Page 17 of 2S <br />Brown and Caldwell ACZ Project ID: L42643 <br />