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Home My WebLink AboutNC0038377_Table H-2_20150902Mayo July 2015 July 2015 SynTerra TABLE H-2. SUMMARY OF INTERWELL PREDICTION LIMIT RESULTS Mayo Ash Ponds Well Number Detected Parameter Comparison Type April 2015 Result (mg/L) Prediction Limit Logtransformed Result Logtransformed Prediction Limit Failure Y/N Confidence Level (%) Treatment of Nondetects CW-1 Aluminum Parametric -Log Transformed 0.791 1.41 0.067 0.0079 N 99 Replace with 1/2 PQL CW-1 Barium Nonparametric 0.006 1.04 N 80 None Required CW-1 Cadmium Parametric -Log Transformed 0.00123 0.00128 0.0002 0.0023 N 99 Replace with 1/2 PQL CW-1 Chloride Parametric 19.0 54.6 N 99 CW-1 Iron Parametric -Log Transformed 0.608 41.8 0.006 0.01 N 99 Replace with 1/2 PQL CW-1 Manganese Parametric -Log Transformed 0.027 1.49 0.0033 0.0081 N 99 CW-1 Nitrate Nonparametric 1.5 0.590 Y 80 CW-1 Sulfate Nonparametric 10 25 (ND) N 80 None Required CW-1 Zinc Parametric 0.013 0.182 N 99 Replace with 1/2 PQL CW-1 Total Dissolved Solids Parametric 160 702 N 99 CW-1D Aluminum Parametric -Log Transformed 0.014 1.41 0.0026 0.0079 N 99 Replace with 1/2 PQL CW-1D Chloride Parametric 10.0 54.6 N 99 CW-1D Iron Parametric -Log Transformed 0.011 41.8 0.0024 0.010 N 99 Replace with 1/2 PQL CW-1D Manganese Parametric -Log Transformed 0.006 1.49 0.0018 0.0081 N 99 Replace with 1/2 PQL CW-1D Nitrate Parametric 0.510 0.973 N 99 Replace with 1/2 PQL CW-11D Sulfate Parametric 5.0 16.1 N 99 Replace with 1/2 PQL CW-1D Total Dissolved Solids Nonparametric 210 450 N 80 None Required CW-2 Aluminum Parametric -Log Transformed 0.034 1.41 0.0035 0.0079 N 99 Replace with 1/2 PQL CW-2 Barium Parametric 0.097 0.695 N 99 CW-2 Boron Parametric 0.524 0.093 Y 99 CW-2 Chloride Parametric 33.0 54.6 N 99 CW-2 Iron Parametric -Log Transformed 0.017 41.8 0.0028 0.010 N 99 Replace with 1/2 PQL CW-2 Manganese Parametric -Log Transformed 0.170 1.49 0.0051 0.0081 N 99 CW-2 Sulfate Parametric 39.0 16.1 Y 99 CW-2 Total Dissolved Solids Parametric 140 702 N 99 CW-21D Aluminum Parametric -Log Transformed 0.206 1.41 0.0053 0.0079 N 99 CW-2D Barium Parametric 0.042 0.695 N 99 CW-2D Boron Parametric 0.325 0.093 Y 99 CW-2D Chloride Parametric 44.0 54.6 N 99 CW-2D Iron Parametric 0.149 41.8 N 99 CW-2D Manganese Parametric 0.123 1.49 N 99 CW-2D Sulfate Parametric 50.0 16.1 Y 99 CW-2D Zinc Parametric 1 0.020 0.182 N 99 Replace with 1/2 PQL CW-2D Total Dissolved Solids I Parametric 1 240 702 N 99 P:\Duke Energy Progress.1026 \ 105. Mayo Ash Basin GW Assessment Plan \ 1.11 CSA Reporting \ Appendices \ Table 2 Prediction Limits April2015.xls 1 of 2 Mayo July 2015 July 2015 SynTerra TABLE H-2. SUMMARY OF INTERWELL PREDICTION LIMIT RESULTS Mayo Ash Ponds Well Number Detected Parameter Comparison Type April 2015 Result (mg/L) Prediction Limit Logtransformed Result Logtransformed Prediction Limit Failure Y/N Confidence Level (%) Treatment of Nondetects CW-3 Aluminum Parametric -Log Transformed 0.063 1.41 0.0041 0.0079 N 99 Replace with 1/2 PQL CW-3 Barium Parametric -Log Transformed 0.019 0.695 0.0029 0.0063 N 99 CW-3 Chloride Parametric 100 54.6 Y 99 CW-3 Iron Parametric -Log Transformed 0.053 41.8 0.004 0.010 N 99 Replace with 1/2 PQL CW-3 Manganese Parametric 0.009 1.49 N 99 CW-3 Nitrate Nonparametric 0.300 0.590 N 80 None Required CW-3 Sulfate Parametric 15.0 16.1 N 99 CW-3 Total Dissolved Solids Parametric 440 702 N 99 CW-4 Aluminum Parametric -Log Transformed 0.076 1.41 0.0043 0.0079 N 99 Replace with 1/2 PQL CW-4 Barium Parametric 0.022 0.695 N 99 CW-4 Chloride Parametric 5.8 54.6 N 99 CW-4 Iron Parametric -Log Transformed 0.037 41.8 0.0036 0.010 N 99 CW-4 Nitrate Parametric 0.140 0.973 N 99 Replace with 1/2 PQL CW-4 Sulfate Parametric 18.0 16.1 Y 99 CW-4 Total Dissolved Solids Parametric -Log Transformed 150 702 0.012 0.015 N 99 CW-5 Aluminum Nonparametric 0.163 1.7 N 77.8 None Required CW-5 Barium Parametric 0.054 0.695 N 99 CW-5 Chloride Parametric 32.0 54.6 N 99 CW-5 Iron Parametric 0.731 41.8 N 99 CW-5 Manganese Parametric 0.696 1.49 N 99 CW-5 Sulfate Parametric 8.7 16.1 N 99 Replace with 1/2 PQL CW-5 Total Dissolved Solids Nonparametric 270 450 N 80 None Required CW-6 Aluminum Parametric -Log Transformed 0.055 1.41 0.004 0.0079 N 99 Replace with 1/2 PQL CW-6 Barium Parametric 0.042 0.695 N 99 CW-6 Chloride Parametric -Log Transformed 81.0 54.6 0.0113 0.0114 N 99 CW-6 Iron Parametric 1.37 41.8 N 99 CW-6 Manganese Parametric 1.30 1.49 N 99 CW-6 Selenium Nonparametric 0.00148 1 0.0071 1 1 N 99 1 Replace with 1/2 PQL CW-6 Sulfate Parametric 41.0 16.1 Y 99 CW-6 Total Dissolved Solids Parametric 540 702 N 99 NOTES: Only constituents detected above the PQL in compliance wells during the April 2015 monitoirng event were analyzed. Prediction limit comparison type is based on the percentage of nondetects and distribution of the dataset (Table 1) PQL Practical quantitation limit * Data set does not contain any nondetects None Required Percentage of nondetects greater than 50 percent and less than 90 percent or dataset is non -normally distributed Replace with 1/2 PQL Percentage of nondetects less than or equal to 50 percent and the data distribution is normal or lognormal or percentage of nondetects is greater than or equal to 90 percent (ND) Prediction limit for nonparametric comparison was the PQL for a nondetect Result exceeds the prediction limit Prepared by: MCM Checked by: KLS P:\Duke Energy Progress.1026 \ 105. Mayo Ash Basin GW Assessment Plan \ 1.11 CSA Reporting \ Appendices \ Table 2 Prediction Limits April2015.xls 2 of 2