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Table 2A. Single-Operator Accuracy and Precision of Standard Anions (Method A) <br /> Number Mean Standard <br /> Sample Spike of Recovery Deviation <br /> Analyte Type (mg/L) Replicates % (mg/L) <br /> Bromide RW 5.0 7 99 0.08 <br /> DW 5.0 7 105 0.10 <br /> SW 5.0 7 95 0.13 <br /> WW 5.0 7 105 0.34 <br /> GW 5.0 7 92 0.34 <br /> SD 2.0 7 82 0.06 <br /> Chloride RW 20.0 7 96 0.35 <br /> DW 20.0 7 108 1.19 <br /> SW 10.0 7 86 0.33 <br /> WW 20.0 7 101 5.2 <br /> GW 20.0 7 114 1.3 <br /> SD 20.0 7 90 0.32 <br /> Fluoride RW 2.0 7 91 0.05 <br /> DW 1.0 7 92 0.06 <br /> SW 1.0 7 73 0.05 <br /> WW 1.0 7 87 0.07 <br /> GW 0.4 7 95 0.07 <br /> SD 5.0 7 101 0.35 <br /> Nitrate-N RW 10.0 7 103 0.21 <br /> DW 10.0 7 104 0.27 <br /> SW 10.0 7 93 0.17 <br /> WW 10.0 7 101 0.82 <br /> GW 10.0 7 97 0.47 <br /> SD 10.0 7 82 0.28 <br /> Nitrite-N RW 10.0 7 97 0.14 <br /> DW 10.0 7 121 0.25 <br /> SW 5.0 7 92 0.14 <br /> WW 5.0 7 91 0.50 <br /> GW 10.0 7 96 0.35 <br /> SD 2.0 7 98 0.08 <br /> O-Phosphate-P RW 10.0 7 99 0.17 <br /> DW 10.0 7 99 0.26 <br /> SW 10.0 7 98 0.22 <br /> WW 10.0 7 106 0.85 <br /> GW 10.0 7 95 0.33 <br /> Sulfate RW 20.0 7 99 0.40 <br /> DW 50.0 7 105 3.35 <br /> SW 40.0 7 95 1.7 <br /> WW 40.0 7 102 6.4 <br /> GW 40.0 7 112 3.2 <br /> RW= Reagent Water WW= Mixed Domestic and Industrial Wastewater <br /> DW= Drinking Water GW= Groundwater <br /> SW= Surface Water SD = USEPA QC Solid (Shale) <br /> 300.0-7 August 1991 <br />