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CAM Metals in Groundwater-EPA Method 6010B and Mercury in Groundwater <br /> EPA Method 7470 <br /> Holding Times <br /> The holding time for water for dissolved metals is six months and 28 days for mercury. <br /> The samples were analyzed within this time period. <br /> Method Blanks <br /> Method blanks were analyzed with the sample. The blank was contaminate free of all <br /> analytes. <br /> Sensitivity <br /> No dilutions were necessary therefore the target RLs were achieved. <br /> Matrix Spike/Matrix Spike Duplicate <br /> The MS/MSD were analyzed with the samples. The MS and MSD % recoveries and the <br /> RPDs were within the control limits. <br /> Laboratory Control Sample <br /> The LCS was prepared and analyzed the same dates as the samples. The LCS results <br /> were within the control limits for%recoveries for all analytes as stated by Calscience. <br /> Duplicate Samples <br /> Analyte Sample# Result Dup. Result % RFC <br /> (mg/L Sam le# m /L <br /> Barium TW-5 0.101 TW-51) 0.0986 98 <br /> Molybdenum TW-5 0.007 TW-51) 0.009 129 <br /> Nickel TW-5 0.008 TW-5D 0.009 113 <br /> Vanadium TW-5 0.008 TW-5D 0.008 100 <br /> Zinc TW-5 0.037 TW-51) 0.035 95 <br /> 20 <br />