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Table 2. Results History for Parameters of Concern, Groundwater Monitoring, <br />GCC Rio Grande, Inc., Pueblo Cement Plant, Pueblo, Colorado. <br />Radium 226 and Radium 228 <br />Shaded results equal or exceed State Numeric Protection Level <br />Avg = Average Concentration <br />Std = Standard Deviation of Average Concentration <br />3 of 3 <br />State Numeric Protection Levels <br />Radium 226 = 23.5 pCi/L and Radium 228 = 12.3 pCi/L <br />Date <br />Ra 226 <br />Ra 228 <br />Ra 226 <br />Ra 228 <br />Ra 226 <br />Ra 228 <br />Sample <br />pCi/L <br />pCi/L <br />Sample <br />pCi/L <br />pCi/L <br />Sample <br />pCi/L <br />pCi/L <br />Apr -03 <br />Jun -03 <br />Jul -03 <br />Aug -03 <br />Sep -03 <br />Oct -03 <br />Nov -03 <br />Dec -03 <br />Feb -04 <br />Apr -04 <br />Mar -08 <br />Jul -08 <br />Nov -08 <br />May -09 <br />Oct -09 <br />Apr -10 <br />Oct -10 <br />Apr -11 <br />Oct -11 <br />Mar -12 <br />Jun -12 <br />MW -02 <br />23.5 <br />2.48 <br />MW -03 <br />23 <br />0.3 <br />MW-04 <br />5.15 <br />0.08 <br />MW -02 <br />2.6 <br />2.89 <br />MW -03 <br />2.84 <br />3.28 <br />MW-04 <br />2.99 <br />3.54 <br />MW -02 <br />9.35 <br />7.85 <br />MW -03 <br />na <br />na <br />MW-04 <br />5.01 <br />4.25 <br />MW -02 <br />2.4 <br />1.84 <br />MW -03 <br />na <br />na <br />MW-04 <br />1.6 <br />2.51 <br />MW -02 <br />1.04 <br />3.57 <br />MW -03 <br />na <br />na <br />MW-04 <br />0.76 <br />4.64 <br />MW -02 <br />0.68 <br />1.39 <br />MW -03 <br />na <br />na <br />MW-04 <br />1.43 <br />3.06 <br />MW -02 <br />2.63 <br />1.72 <br />MW -03 <br />na <br />na <br />MW-04 <br />4.7 <br />5.21 <br />MW -02 <br />1.58 <br />1.14 <br />MW -03 <br />na <br />na <br />MW-04 <br />1.33 <br />2.66 <br />MW -02 <br />2.06 <br />1.55 <br />MW -03 <br />1.6 <br />0.68 <br />mw-04 <br />0.86 <br />1.54 <br />MW -02 <br />Na <br />na <br />MW -03 <br />na <br />na <br />MW-04 <br />na <br />Na <br />MW -02 <br />1.9 <br />3.0 <br />MW -03 <br />1.1 <br />0.2 <br />MW_04 <br />2.2 <br />9.3 <br />MW -02 <br />0.8 <br />2.2 <br />MW -03 <br />1.3 <br />0.6 <br />MW -04 <br />1.3 <br />3.1 <br />MW -02 <br />1.6 <br />0.9 <br />MW -03 <br />2.3 <br />0.7 <br />MW -04 <br />1.1 <br />7.5 <br />MW -02 <br />2.0 <br />0.9 <br />MW_03 <br />1.2 <br />0.8 <br />MW_04 <br />3.8 <br />5.9 <br />MW -02 <br />2.1 <br />4.3 <br />MW -03 <br />1.0 <br />0.3 <br />MW -04 <br />3.8 <br />7.7 <br />MW -02 <br />4.1 <br />1.9 <br />MW-03 <br />6.8 <br />1.8 <br />MW -04 <br />6.8 <br />1.8 <br />MW -02 <br />3.0 <br />2.0 <br />MW -03 <br />1.5 <br />1.9 <br />MW-04 <br />1.5 <br />1.9 <br />MW -02 <br />3.4 <br />3.9 <br />MW-03 <br />2.3 <br />0.3 <br />MW-04 <br />2.5 <br />3.6 <br />MW -02 <br />1.4 <br />2.5 <br />MW -03 <br />1.3 <br />0.8 <br />MW-04 <br />3.8 <br />9.0 <br />MW -02 <br />2.6 <br />2.1 <br />MW -03 <br />3.5 <br />1.0 <br />x_04. <br />3.0 <br />13.0 <br />MW -02 <br />2.0 <br />1.1 <br />MW -03 <br />1.0 <br />0.2 <br />x_04 <br />2.0 <br />2.0 <br />Avg <br />3.54 <br />2.46 <br />Avg <br />3.62 <br />0.92 <br />Avg <br />2.71 <br />4.74 <br />Count <br />20 <br />20 <br />Count <br />14 <br />14 <br />Count <br />20 <br />20 <br />Std <br />5.04 <br />1.59 <br />Std <br />5.79 <br />0.87 <br />Std <br />1.48 <br />3.20 <br />Table 2. Results History for Parameters of Concern, Groundwater Monitoring, <br />GCC Rio Grande, Inc., Pueblo Cement Plant, Pueblo, Colorado. <br />Radium 226 and Radium 228 <br />Shaded results equal or exceed State Numeric Protection Level <br />Avg = Average Concentration <br />Std = Standard Deviation of Average Concentration <br />3 of 3 <br />