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Home My WebLink AboutNC0003433_Horizontal Velocity Calculations_20150902Appendix G Duke Energy Progress, LLC - Cape Fear Water Well ID Elevation MSL ABMW-01BR 1 172.56 MW-5BR 1 166.82 MSL - Feet Above Mean Sea Level Depth measurements in feet Monitoring Event: June 2015 NBMW-01BR to MW-513111 DISTANCE CHANGE IN LEVEL GRADIENT 840 5.74 0.0068° HORIZONTAL GRADIENT (i): 0.0068 Average Groundwater Velocity (V)* Phase I *Based on the Darcy Equation where velocity equals (K x i) / n Hydraulic Conductivity (K) values (units of ft/day) can be found in Table 6-10 K K Geomean ABMW-01BR 2.62E+00 0.15 MW-5BR I 8.50E-03 (Inw value) (high value) Effective Porosity Geomean Porosity Fractured Bedrock Range Lithology ABMW-01BR 0.12 Mudstone 0.12 0.5 MW-5BR 0.12 Mudstone Hydraulic Conductivity (K) 0.1492 foot/day Average Horizontal Gradient (i) 0.0068 foot/foot Porosity (n) 12 50 percent Velocity = 8.50E-03 foot/day 3 foot/year to 2.04E-03 foot/day 0.7 foot/year ASSUMPTIONS: 1. K of 0.1492 ft/day based on in -situ slug and packer tests 2. Porosity based on values from Argonne National Laboratory for mudstone (low range) and fractured basalt (high range). Prepared by: RKD Date: 8/29/2015 Checked: TDP Date: 9/1/2015 P:\Duke Energy Progress. 1 026\1 03. Cape Fear Ash Basin GW Assessment\1.11 CSA Reporting\Appendices\G - In -Situ Hydraulic Cond\Backup Hydraulic Velocities\ABMW-01 BR to MW-5BR Appendix G Duke Energy Progress, LLC - Cape Fear Water Well ID Elevation MSL ABMW-01BR 172.56 MW-6BR 1 165.18 MSL - Feet Above Mean Sea Level Depth measurements in feet Monitoring Event: June 2015 ABMW-OIBR to MW-6BR )ISTANCE CHANGE IN LEVEL GRADIENT 1,860 7.38 0.00397 HORIZONTAL GRADIENT (i): 0.004U Average Groundwater Velocity (V)* Phase I *Based on the Darcy Equation where velocity equals (K x i) / n Hydraulic Conductivity (K) values (units of ft/day) can be found in Table 6-10 K K Geomean ABMW-01BR 2.62 2.46 MW-6BR 2.31 (low value) (high value) Effective Porosity Geomean Porosity Fractured Bedrock Range Lithology ABMW-01BR 0.12 Mudstone 0.18 0.5 MW-6BR 0.27 Sandstone (conglomerate) Hydraulic Conductivity (K) 2.4601 foot/day Average Horizontal Gradient (i) 0.0040 foot/foot Porosity (n) 18 50 percent Velocity = 5.42E-02 foot/day 20 foot/year to 1.95E-02 foot/day 7 foot/year ASSUMPTIONS: 1. K of 2.4601 ft/day based on in -situ slug and packer tests 2. Porosity based on values from Argonne National Laboratory for mudstone and sandstone (low range) and fractured basalt (high range). Prepared by: RKD Date: 8/29/2015 Checked: TDP Date: 9/1/2015 P:\Duke Energy Progress. 1 026\1 03. Cape Fear Ash Basin GW Assessment\1.11 CSA Reporting\Appendices\G - In -Situ Hydraulic Cond\Backup Hydraulic Velocities\ABMW-01 BR to MW-6BR Appendix G Duke Energy Progress, LLC - Cape Fear Water Well ID Elevation MSL ABMW-01BR 1 172.56 MW-17BR 1 165.59 MSL - Feet Above Mean Sea Level Depth measurements in feet Monitoring Event: ABMW-011311 to MW-17BR DISTANCE CHANGE IN LEVEL GRADIENT 1,860 6.97 0.00375 HORIZONTAL GRADIENT (i): 0.0037 Average Groundwater Velocity (V)* Phase I *Based on the Darcy Equation where velocity equals (K x i) / n Hydraulic Conductivity (K) values (units of ft/day) can be found in Table 6-10 K K Geomean ABMW-0113R 1 2.62 1.71 MW-17BR 1 1.12 June 2015 (low value) (hiah value) Effective Porosity Geomean Porosity Fractured Bedrock Range Lithology ABMW-01BR 0.12 Mudstone 0.12 0.5 MW-17BR 0.12 Mudstone Hydraulic Conductivity (K) 1.7130 foot/day (Geometric Mean of K for ABMW-015 and MW-175L) Average Horizontal Gradient (i) 0.0037 foot/foot Porosity (n) 12 50 percent Velocity = 5.35E-02 foot/day 20 foot/year to 1.28E-02 foot/day 5 foot/year ASSUMPTIONS: 1. K of 1.713 ft/day based on in -situ slug and packer tests 2. Porosity based on values from Argonne National Laboratory for mudstone (low range) and fractured basalt (high range). Prepared by: RKD Date: 8/29/2015 Checked: TDP Date: 9/1/2015 P:\Duke Energy Progress. 1 026\1 03. Cape Fear Ash Basin GW Assessment\1.11 CSA Reporting\Appendices\G - In -Situ Hydraulic Cond\Backup Hydraulic Velocities\ABMW-01 BR to MW- 17BR Appendix G Duke Energy Progress, LLC - Cape Fear Water Well ID Elevation _IUMSL ABMW-01S 173.67 CMW-5 1 167.20 MSL - Feet Above Mean Sea Level Depth measurements in feet Monitoring Event: June 2015 ABMW-01S to CMW-5 DISTANCE CHANGE IN LEVEL GRADIENT 810 6.47 0.00799 HORIZONTAL GRADIENT (i): 0.0080 Average Groundwater Velocity (V)* Phase I *Based on the Darcy Equation where velocity equals (K x i) / n Hydraulic Conductivity (K) values (units of ft/day) can be found in Table 6-10 The geometric mean K value for the lower surficial unit was used for CMW-5 K K Geomean ABMW-01S 2.89E+00 2 80 CMW-5 2.71E+00 (low value) (hiah value) Effective Porosity Geomean Porosity Fractured Bedrock Range Lithology ABMW-01S 0.33 Sand (fine) 0.33 NA CMW-5 0.33 Sand (fine) Hydraulic Conductivity (K) 2.7986 foot/day Average Horizontal Gradient (i) 0.0080 foot/foot Porosity (n) 33 NA percent Velocity = 6.77E-02 foot/day 25 foot/year ASSUMPTIONS: 1. K of 2.7986 ft/day based on in -situ slug and packer tests 2. Porosity based on values from Argonne National Laboratory for Sand (fine). Prepared by: RKD Date: 8/29/2015 Checked: TDP Date: 9/1/2015 P:\Duke Energy Progress. 1 026\1 03. Cape Fear Ash Basin GW Assessment\1.11 CSA Reporting\Appendices\G - In -Situ Hydraulic Cond\Backup Hydraulic Velocities\ABMW-01 S to CMW-5 Appendix G Duke Energy Progress, LLC - Cape Fear Water Well ID Elevation MSL ABMW-015 173.67 CMW-6 1 165.43 MSL - Feet Above Mean Sea Level Depth measurements in feet Monitoring Event: ABMW-01S to CMW-6 DISTANCE CHANGE IN LEVEL GRADIENT 1,920 8.24 0.00429 HORIZONTAL GRADIENT (i): 0.0043 Average Groundwater Velocity (V)* Phase I *Based on the Darcy Equation where velocity equals (K x i) / n Hydraulic Conductivity (K) values (units of ft/day) can be found in Table 6-10 The geometric mean K value for the lower surficial unit was used for CMW-6 K I K Geomean ABMW-01S 2.89 El 2.80 CMW-6 1 2.71 June 2015 (Inwvalu(-.) (hinh value) Effective Porosity Geomean Porosity Fractured Bedrock Range L' thology ABMW-01S 0.33 Sand (fine) 0.26 NA CMW-6 0.2 Silt to sand (mostly silt) Hydraulic Conductivity (K) 2.7986 foot/day Average Horizontal Gradient (i) 0.0043 foot/foot Porosity (n) 26 NA percent Velocity = 4.62E-02 foot/day 17 foot/year ASSUMPTIONS: 1. K of 2.7986 ft/day based on in -situ slug and packer tests 2. Porosity based on values from Argonne National Laboratory for sand and silt to sand (low range) and fractured basalt (high range). Prepared by: RKD Date: 8/29/2015 Checked: TDP Date: 8/31/2015 P:\Duke Energy Progress. 1 026\1 03. Cape Fear Ash Basin GW Assessment\1.11 CSA Repo rting\Appendices\G - In -Situ Hydraulic Cond\Backup Hydraulic Velocities\ABMW-01S to CMW-6 Appendix G Duke Energy Progress, LLC - Cape Fear Water Well ID Elevation _IUMSL ABMW-01S 173.67 MW-17SL 1 164.43 MSL - Feet Above Mean Sea Level Depth measurements in feet Monitoring Event: June 2015 ABMW-01S to MW-17SL DISTANCE CHANGE IN LEVEL GRADIENT 1,860 9.24 0.00497 HORIZONTAL GRADIENT (i): 0.0050 Average Groundwater Velocity (V)* Phase I *Based on the Darcy Equation where velocity equals (K x i) / n Hydraulic Conductivity (K) values (units of ft/day) can be found in Table 6-10 K I K Geomean ABMW-01S 2.89E+00 2.16 MW-17SL I 1.62E+00 (low value) (high value) Effective Porosity Geomean Porosity Fractured Bedrock Range Lithology ABMW-01S 0.33 Sand (fine) 0.31 NA MW-17SL 0.3 Sand (coarse) Hydraulic Conductivity (K) 2.1637 foot/day Average Horizontal Gradient (i) 0.0050 foot/foot Porosity (n) 31 NA percent Velocity = 3.47E-02 foot/day 13 foot/year ASSUMPTIONS: 1. K of 2.1637 ft/day based on in -situ slug and packer tests 2. Porosity based on values from Argonne National Laboratory for sand (fine) and sand (coarse) (low range) and fractured basalt (high range). Prepared by: RKD Date: 8/29/2015 Checked: TDP Date: 8/31/2015 P:\Duke Energy Progress. 1 026\1 03. Cape Fear Ash Basin GW Assessment\1.11 CSA Reporting\Appendices\G - In -Situ Hydraulic Cond\Backup Hydraulic Velocities\ABMW-01S to MW-17SL Appendix G Duke Energy Progress, LLC - Cape Fear Water Well ID Elevation MSL ABMW-01S 173.67 PZ-5 1 168.15 MSL - Feet Above Mean Sea Level Depth measurements in feet Monitoring Event: June 2015 ABMW-01S to PZ-5 DISTANCE CHANGE IN LEVEL GRADIENT 660 5.52 0.00836 HORIZONTAL GRADIENT (i): 0.0084 Average Groundwater Velocity (V)* Phase I *Based on the Darcy Equation where velocity equals (K x i) / n Hydraulic Conductivity (K) values (units of ft/day) can be found in Table 6-10 The geometric mean K value for the lower surficial unit was used for PZ-5 K K Geomean ABMW-01S 2.89E+00 2.80 [AB 2.71E+00 /lrnmvallIPl fhinh valiial Effective Porosity Geomean Porosity Fractured Bedrock Range Lithology ABMW-01S 0.33 Sand (fine) 0.26 NA PZ-5 0.2 Clayey silt to silty sand Hydraulic Conductivity (K) 2.7986 foot/day Average Horizontal Gradient (i) 0.0084 foot/foot Porosity (n) 26 NA percent Velocity = 9.00E-02 foot/day 33 foot/year ASSUMPTIONS: 1. K of 2.7986 ft/day based on in -situ slug and packer tests 2. Porosity based on values from Argonne National Laboratory for sand (fine) and clayey silt to silty sand (low range) and fractured basalt (high range). Prepared by: RKD Date: 8/29/2015 Checked: TDP Date: 9/1/2015 P:\Duke Energy Progress. 1 026\1 03. Cape Fear Ash Basin GW Assessment\1.11 CSA Reporting\Appendices\G - In -Situ Hydraulic Cond\Backup Hydraulic Velocities\ABMW-01S to PZ-5 Appendix G Duke Energy Progress, LLC - Cape Fear Water Well ID Elevation MSL ABMW-02SL 184.76 CMW-07 1 162.51 MSL - Feet Above Mean Sea Level Depth measurements in feet Monitoring Event: ABMW-02SL to CMW-07 DISTANCE CHANGE IN LEVEL GRADIENT 1,320 22.25 0.01686 HORIZONTAL GRADIENT (i): 0.0169 Average Groundwater Velocity (V)* Phase I *Based on the Darcy Equation where velocity equals (K x i) / n Hydraulic Conductivity (K) values (units of ft/day) can be found in Table 6-10 The geometric mean K value for the lower surficial unit was used for CMW-07 K K Geomean ABM-02SL 2.77E-87 01 CMW-07 2.71E+00 �' June 2015 low value (high value Effective Porosity Geomean Porosity Fractured Bedrock Range Lithology ABMW-02SL 0.13 Silty clay 0.20 NA CMW-07 0.32 Sand (fine to coarse) Hydraulic Conductivity (K) 0.8664 foot/day Average Horizontal Gradient (i) 0.0169 foot/foot Porosity (n) 20 NA percent Velocity = 7.30E-02 foot/day 27 foot/year ASSUMPTIONS: 1. K of 0.8664 ft/day based on in -situ slug and packer tests 2. Porosity based on values from Argonne National Laboratory for silty clay and sand (fibne to coarse) (low range) and fractured basalt (high range). Prepared by: RKD Date: 8/29/2015 Checked: TDP Date: 9/1/2015 P:\Duke Energy Progress. 1 026\1 03. Cape Fear Ash Basin GW Assessment\1.11 CSA Reporting\Appendices\G - In -Situ Hydraulic Cond\Backup Hydraulic Velocities\ABMW-02SL to CMW-07 Appendix G Duke Energy Progress, LLC - Cape Fear Water Well ID Elevation _IUMSL ABMW-036R 163.99 CTMW-1 1 158.93 MSL - Feet Above Mean Sea Level Depth measurements in feet Monitoring Event: June 2015 ABMW-03BR to CTMW-1 DISTANCE CHANGE IN LEVEL GRADIENT 480 5.06 0.01054 HORIZONTAL GRADIENT (i): 0.0105 Average Groundwater Velocity (V)* Phase I *Based on the Darcy Equation where velocity equals (K x i) / n Hydraulic Conductivity (K) values (units of ft/day) can be found in Table 6-10 The geometric mean K value for the bedrock unit was used for CTMW-1 K K Geomean ABMW-03BR 2.51E+01 5.11 CTMW-1 1.04E+00 (low value) (hiah value) Effective Porosity Geomean Porosity Fractured Bedrock Range Lithology ABMW-03BR 0.12 Mudstone 0.12 0.5 CTMW-1 0.12 Mudstone Hydraulic Conductivity (K) 5.1092 foot/day Average Horizontal Gradient (i) 0.0105 foot/foot Porosity (n) 12 50 percent Velocity = 4.49E-01 foot/day 164 foot/year to 1.08E-01 foot/day 39 foot/year ASSUMPTIONS: 1. K of 5.1092 ft/day based on in -situ slug and packer tests 2. Porosity based on values from Argonne National Laboratory for mudstone (low range) and fractured basalt (high range). Prepared by: RKD Date: 8/29/2015 Checked: TDP Date: 9/1/2015 P:\Duke Energy Progress. 1 026\1 03. Cape Fear Ash Basin GW Assessment\1.11 CSA Reporting\Appendices\G - In -Situ Hydraulic Cond\Backup Hydraulic Velocities\ABMW-03BR to CTMW-1 Appendix G Duke Energy Progress, LLC - Cape Fear Water Well ID Elevation MSL ABMW-03S 169.17 CMW-1 1 157.66 MSL - Feet Above Mean Sea Level Depth measurements in feet Monitoring Event: June 2015 ABMW-03S to CMW-1 DISTANCE CHANGE IN LEVEL GRADIENT 480 11.51 0.02398 HORIZONTAL GRADIENT (i): 0.0240 Average Groundwater Velocity (V)* Phase I *Based on the Darcy Equation where velocity equals (K x i) / n Hydraulic Conductivity (K) values (units of ft/day) can be found in Table 6-10 The geometric mean K value for the lower surficial unit was used for CMW-1 K K Geomean ABMW-03S 1.27E-02 0.19 CMW-1 2.71E+00 (low value) (hiqh value) Effective Porosity Geomean Porosity Fractured Bedrock Range Lithology ABMW-03S 0.32 Sand, fine to coarse, silty 0.25 NA CMW-1 0.2 Silty clay, sand with clay Hydraulic Conductivity (K) 0.1855 foot/day Average Horizontal Gradient (i) 0.0240 foot/foot Porosity (n) 25 NA percent Velocity = 1.78E-02 foot/day 6 foot/year ASSUMPTIONS: 1. K of 0.1855 ft/day based on in -situ slug and packer tests 2. Porosity based on values from Argonne National Laboratory for sand, fine to coarse, silty, and silty clay, sand with clay (low range) and fractured basalt (high range). Prepared by: RKD Date: 8/29/2015 Checked: TDP Date: 9/1/2015 P:\Duke Energy Progress. 1 026\1 03. Cape Fear Ash Basin GW Assessment\1.11 CSA Repo rting\Appendices\G - In -Situ Hydraulic Cond\Backup Hydraulic Velocities\ABMW-03S to CMW-1 Appendix G Duke Energy Progress, LLC - Cape Fear Water Well ID Elevation MSL ABMW-04S 173.92 CMW-8 1 161.04 MSL - Feet Above Mean Sea Level Depth measurements in feet Monitoring Even June 2015 ABMW-04S to CMW-8 DISTANCE CHANGE IN LEVEL GRADIENT 540 12.88 0.02385 HORIZONTAL GRADIENT (i): 0.0239 Average Groundwater Velocity (V)* Phase I *Based on the Darcy Equation where velocity equals (K x i) / n Hydraulic Conductivity (K) values (units of ft/day) can be found in Table 6-10 The geometric mean K value for the lower surficial unit was used for CMW-8 K I K Geomean ABMW-04S 8.19E-01 1.49 CMW-8 1 2.71E+00 (low value) (hiqh value) Effective Porosity Geomean Porosity Fractured Bedrock Range Lithology ABMW-045 0.2 Silty sand 0.25 NA CMW-8 0.32 Clayey sand, silty clay, clayey silt Hydraulic Conductivity (K) 1.4898 foot/day Average Horizontal Gradient (i) 0.0239 foot/foot Porosity (n) 25 NA percent Velocity = 1.42E-01 foot/day 52 foot/year ASSUMPTIONS: 1. K of 1.4898 ft/day based on in -situ slug and packer tests 2. Porosity based on values from Argonne National Laboratory for silty sand and clayey sand, silty clay, clayey silt (low range) and fractured basalt (high range). Prepared by: RKD Date: 8/29/2015 Checked: TDP Date: 9/1/2015 P:\Duke Energy Progress.1026\103. Cape Fear Ash Basin GW Assessment\1.11 CSA Reporting\Appendices\G - In -Situ Hydraulic Cond\Backup Hydraulic Velocitles\ABMW-04S to CMW-8 Appendix G Duke Energy Progress, LLC - Cape Fear Water Well ID Elevation _IUMSL ABMW-056R 161.19 CTMW-02 1 157.62 MSL - Feet Above Mean Sea Level Depth measurements in feet Monitoring Event: June 2015 ABMW-051311 to CTMW-02 DISTANCE CHANGE IN LEVEL GRADIENT 840 3.57 0.00425 HORIZONTAL GRADIENT (i): 0.0042 Average Groundwater Velocity (V)* Phase I *Based on the Darcy Equation where velocity equals (K x i) / n Hydraulic Conductivity (K) values (units of ft/day) can be found in Table 6-10 The geometric mean K value for the bedrock unit was used for CTMW-02 K K Geomean ABMW-05BR 4.08E-02 0.21 CTM W-02 1.04E+00 (low value) (hiah value) Effective Porosity Geomean Porosity Fractured Bedrock Range Lithology ABMW-05BR 0.21 Sandstone (fine) 0.16 0.5 CTMW-02 0.12 Siltstone Hydraulic Conductivity (K) 0.2060 foot/day Average Horizontal Gradient (i) 0.0042 foot/foot Porosity (n) 16 50 percent Velocity = 5.47E-03 foot/day 2 foot/year to 1.75E-03 foot/day 1 foot/year ASSUMPTIONS: 1. K of 0.206 ft/day based on in -situ slug and packer tests 2. Porosity based on values from Argonne National Laboratory for sandstone (fine) and siltstone (low range) and fractured basalt (high Prepared by: RKD Date: 8/29/2015 Checked: TDP Date: 9/1/2015 P:\Duke Energy Progress. 1 026\1 03. Cape Fear Ash Basin GW Assessment\1.11 CSA Reporting\Appendices\G - In -Situ Hydraulic Cond\Backup Hydraulic Velocities\ABMW-05BR to CTMW-02 Appendix G Duke Energy Progress, LLC - Cape Fear Water Well ID Elevation _IUMSL ABMW-056R 161.19 MW-10BR 1 158.61 MSL - Feet Above Mean Sea Level Depth measurements in feet Monitoring Event: June 2015 ABMW-05113111 to MW-10BR DISTANCE CHANGE IN LEVEL GRADIENT 540 2.58 0.00478 HORIZONTAL GRADIENT (i): 0.0048 Average Groundwater Velocity (V)* Phase I *Based on the Darcy Equation where velocity equals (K x i) / n Hydraulic Conductivity (K) values (units of ft/day) can be found in Table 6-10 K K Geomean ABMW-05BR 4.08E-02 0.15 MW-10BR I 5.16E-01 (low valuel (hiah value) Effective Porosity Geomean Porosity Fractured Bedrock Range Lithology ABMW-05BR 0.21 Sandstone (fine) 0.16 0.5 MW-10BR 0.12 Mudstone Hydraulic Conductivity (K) 0.1451 foot/day Average Horizontal Gradient (i) 0.0048 foot/foot Porosity (n) 16 50 percent Velocity = 4.33E-03 foot/day 2 foot/year to 1.39E-03 foot/day 1 foot/year ASSUMPTIONS: 1. K of 0.1451 ft/day based on in -situ slug and packer tests 2. Porosity based on values from Argonne National Laboratory for sandstone and mudstone (low range) and fractured basalt (high range). Prepared by: RKD Date: 8/29/2015 Checked: TDP Date: 9/1/2015 P:\Duke Energy Progress. 1 026\1 03. Cape Fear Ash Basin GW Assessment\1.11 CSA Reporting\Appendices\G - In -Situ Hydraulic Cond\Backup Hydraulic Velocities\ABMW-05BR to MW-10BR Appendix G Duke Energy Progress, LLC - Cape Fear Water Well ID Elevation —MILL-_ ABMW-05S 161.28 CMW-02 1 158.74 MSL - Feet Above Mean Sea Level Depth measurements in feet Monitoring Event: June 2015 ABMW-05S to CMW-02 DISTANCE CHANGE IN LEVEL GRADIENT 840 2.54 0.00302 HORIZONTAL GRADIENT i : 0.0030 Average Groundwater Velocity (V)* Phase I *Based on the Darcy Equation where velocity equals (K x i) / n Hydraulic Conductivity (K) values (units of ft/day) can be found in Table 6-10 The geometric mean K value for the lower surficial unit was used for CMW-02 K K Geomean ABMW-05S 1.35E+01 6.05 CMW-02 2.71E+00 (low value) (hiqh value) Effective Porosity Geomean Porosity Fractured Bedrock Range Lithology ABMW-05S 0.3 Sand (coarse) 0.31 NA CMW-02 0.33 Sand (fine) Hydraulic Conductivity (K) 6.0486 foot/day Average Horizontal Gradient (i) 0.0030 foot/foot Porosity (n) 31 NA percent Velocity = 5.90E-02 foot/day 22 foot/year ASSUMPTIONS: 1. K of 6.0486 ft/day based on in -situ slug and packer tests 2. Porosity based on values from Argonne National Laboratory for sand (coarse) and sand (fine) (low range) and fractured basalt (high range). Prepared by: RKD Date: 8/29/2015 Checked: TDP Date: 9/1/2015 P:\Duke Energy Progress. 1 026\1 03. Cape Fear Ash Basin GW Assessment\1.11 CSA Reporting\Appendices\G - In -Situ Hydraulic Cond\Backup Hydraulic Velocities\ABMW-05S to CMW-02 Appendix G Duke Energy Progress, LLC - Cape Fear Water Well ID Elevation MSL ABMW-055 161.28 MW-10 1 160.46 MSL - Feet Above Mean Sea Level Depth measurements in feet Monitoring Event: June 2015 ABMW-05S to MW-10 DISTANCE CHANGE IN LEVEL GRADIENT 540 0.82 0.00152 HORIZONTAL GRADIENT (i): 0.0015 Average Groundwater Velocity (V)* Phase I *Based on the Darcy Equation where velocity equals (K x i) / n Hydraulic Conductivity (K) values (units of ft/day) can be found in Table 6-10 The geometric mean K value for the lower surficial unit was used for MW-10 K K Geomean ABMW-05S 1.35E+01 6.05 MW-10 2.71E+00 (InwvaluP) (hinh value) Effective Porosity Geomean Porosity Fractured Bedrock Range Lithology ABMW-05S 0.3 Sand (coarse) 0.24 NA MW-10 0.2 Sandy clay to sand (fine) Hydraulic Conductivity (K) 6.0486 foot/day Average Horizontal Gradient (i) 0.0015 foot/foot Porosity (n) 24 NA percent Velocity = 3.83E-02 foot/day 14 foot/year ASSUMPTIONS: 1. K of 6.0486 ft/day based on in -situ slug and packer tests 2. Porosity based on values from Argonne National Laboratory for sand (coarse) and sandy clay to sand (fine) (low range) and fractured basalt (high range). Prepared by: RKD Date: 8/29/2015 Checked: TDP Date: 9/1/2015 P:\Duke Energy Progress. 1 026\1 03. Cape Fear Ash Basin GW Assessment\1.11 CSA Reporting\Appendices\G - In -Situ Hydraulic Cond\Backup Hydraulic Velocities\ABMW-05S to MW-10 Appendix G Duke Energy Progress, LLC - Cape Fear Water Well ID Elevation MSL BGMW-04 164.89 ABM W-055 1 161.28 MSL - Feet Above Mean Sea Level Depth measurements in feet Monitoring Event: June 2015 BGMW-04 to ABMW-05S DISTANCE CHANGE IN LEVEL GRADIENT 1,560 3.61 0.00231 HORIZONTAL GRADIENT (i): 0.0023 Average Groundwater Velocity (V)* Phase I *Based on the Darcy Equation where velocity equals (K x i) / n Hydraulic Conductivity (K) values (units of ft/day) can be found in Table 6-10 The geometric mean K value for the lower surficial unit was used for BGMW-04 K K Geomean BGMW-04 2.71 6.05 ABMW-05S 1 1.35E+01 (IMN VAII IPA (hinh vnhia) Effective Geomean Porosity Fractured Bedrock Lithology Porosity Range Sand (coarse) to silt & BGMW-04 0.2 weathered rock 0.24 NA ABMW-05S 0.3 Sand (coarse) Hydraulic Conductivity (K) 6.0486 foot/day Average Horizontal Gradient (i) 0.0023 foot/foot Porosity (n) 24 NA percent Velocity = 5.83E-02 foot/day 21 foot/year ASSUMPTIONS: 1. K of 6.0486 ft/day based on in -situ slug and packer tests 2. Porosity based on values from Argonne National Laboratory for sand (coarse) to silt and weathered rock and sand (coarse) (low range) and fractured basalt (high range). Prepared by: RKD Date: 8/29/2015 Checked: TDP Date: 9/1/2015 P:\Duke Energy Progress.1026\103. Cape Fear Ash Basin GW Assessment\1.11 CSA Reporting\Appendices\G - In -Situ Hydraulic Cond\Backup Hydraulic Velocities\BGMW-04 to ABMW-05S Appendix G Duke Energy Progress, LLC - Cape Fear Water Well ID Elevation _IUMSL BGTMW-04 164.89 ABMW-05BR 1 161.19 MSL - Feet Above Mean Sea Level Depth measurements in feet Monitoring Event: June 2015 BGTMW-04 to ABMW-05BR DISTANCE CHANGE IN LEVEL GRADIENT 1,560 3.70 0.00237 HORIZONTAL GRADIENT (i): 0.0024 Average Groundwater Velocity (V)* Phase I *Based on the Darcy Equation where velocity equals (K x i) / n Hydraulic Conductivity (K) values (units of ft/day) can be found in Table 6-10 The geometric mean K value for the bedrock unit was used for BGTMW-04 K K Geomean BGTMW-04 1.04E+00 0.21 ABMW-05BR I 4.08E-02 (low valuel (hiah value) Effective Porosity Geomean Porosity Fractured Bedrock Range Lithology BGTMW-04 0.12 Mudstone 0.16 0.5 ABMW-05BR 0.21 Sandstone (fine) Hydraulic Conductivity (K) 0.2060 foot/day Average Horizontal Gradient (i) 0.0024 foot/foot Porosity (n) 16 50 percent Velocity = 3.05E-03 foot/day 1 foot/year to 9.77E-04 foot/day 0.4 foot/year ASSUMPTIONS: 1. K of 0.206 ft/day based on in -situ slug and packer tests 2. Porosity based on values from Argonne National Laboratory for siltstone (low range) and fractured basalt (high range). Prepared by: RKD Date: 8/29/2015 Checked: TDP Date: 9/1/2015 P:\Duke Energy Progress. 1 026\1 03. Cape Fear Ash Basin GW Assessment\1.11 CSA Reporting\Appendices\G - In -Situ Hydraulic Cond\Backup Hydraulic Velocities\BGTMW-04 to ABMW-05BR