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Home My WebLink AboutNC0038377_Horizontal Velocity Calc_20150902Duke Energy Progress, LLC - Mayo Steam Electric Plant Water Well ID Elevation (MSL) MW-12S 556.60 ABMW-03S 483.04 MSL - Feet Above Mean Sea Level Depth measurements in feet MW-12S to ABMW-03S DISTANCE CHANGE IN LEVEL GRADIENT 4,388 73.56 0.01676 HORIZONTAL GRADIENT (i): 0.0168 Average Groundwater Velocity (V)* Phase I *Based on the Darcy Equation where velocity equals (K x i) / n Hvdraulic Conductivitv values (units of ft/dav) from Table 6-9 Well ID Slug Test Slug Test Hydraulic Conductivity ft/da Measured Geomeric Mean Number MW-12S Slu Out Test 1 2.21E-02 2.21E-02 ABMW-03S Slu Out Slu Out Test 1 Test 2 4.54E-01 4.55E-01 4.55E-01 Slu Out Test 3 4.56E-01 Hydraulic Conductivity (K) 0.1003 foot/day (Geometric Mean of K for MW-12S and ABMW-03S) Average Horizontal Gradient (i) 0.0168 foot/foot Porosity (n) 35.4 percent Velocity = 0.00475 foot/day 1.73 foot/year ASSUMPTIONS: Monitoring Event: June 2015 1. K of 0.1003 ft/day based on in -situ slug tests 2. Porosity is based on average value of saprolitic soils as determined by BLE (Appendix F). Prepared by: RAG Date: Checked: EMB Date: 8/15/2015 8/16/2015 P:\Duke Energy Progress. 1 026\1 05. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\FINAL\APPENDICES\Appendix G\Mayo_Hydraulic_Velocities Duke Energy Progress, LLC - Mayo Steam Electric Plant Water Well ID Elevation (MSL) ABMW-03S 483.04 MW-16S 366.92 MSL - Feet Above Mean Sea Level Depth measurements in feet ABMW-03S to MW-16S DISTANCE CHANGE IN LEVEL GRADIENT 3,450 116.12 0.03366 HORIZONTAL GRADIENT (i): 0.0337 Average Groundwater Velocity (V)* Phase I *Based on the Darcy Equation where velocity equals (K x i) / n Hvdraulic Conductivity values (units of ft/dav) from Table 6-9 Well ID Slug Test Slug Test Number Hydraulic Conductivity ft/da Measured Geomeric Mean ABMW-03S Slug Out I Test 1 4.54E-01 4.55E-01 Slu Out Test 2 4.55E-01 Slu Out Test 3 4.56E-01 MW-16S Slu -Out Test 1 1.73E-02 1.73E-02 Hydraulic Conductivity (K) 0.0886 foot/day (Geometric Mean of K for ABMW-03S and MW-16S) Average Horizontal Gradient (i) 0.0337 foot/foot Porosity (n) 22.7 percent Velocity = 0.01314 foot/day 4.80 foot/year to Porosity (n) 28.4 percent Velocity = 0.01050 foot/day 3.83 foot/year ASSUMPTIONS: Monitoring Event: June 2015 1. K of 0.0886 ft/day based on in -situ slug tests 2. Porosity is based on average value of alluvium and saprolite soils as determined by BLE (Appendix F). Prepared by: RAG Date: 8/15/2015 Checked: EMB Date: 8/16/2015 P:\Duke Energy Progress. 1 026\1 05. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\FINAL\APPENDICES\Appendix G\Mayo_Hydraulic_Velocities Duke Energy Progress, LLC - Mayo Steam Electric Plant Water Well ID Elevation (MSL) MW-12D 556.90 ABMW-04D 485.06 MSL - Feet Above Mean Sea Level Depth measurements in feet MW-12D to ABMW-04D DISTANCE CHANGE IN LEVEL GRADIENT 3,910 71.84 0.01837 HORIZONTAL GRADIENT (i): 0.0184 Average Groundwater Velocity (V)* Phase I *Based on the Darcy Equation where velocity equals (K x i) / n Hvdrai lic Conductivity values (units of ft/dav) frnm Tahle 6-9 Well ID Slug Test Slug Test Number Hydraulic Conductivity ft/da Measured Geomeric Mean MW-12D I Slug Out I Test 1 3.02E+00 3.02E+00 ABMW 04D Slu Out Test 1 5.88E-02 5.88E-02 Hydraulic Conductivity (K) 0.4210 foot/day (Geometric Mean of K for MW-12D and ABMW-04D) Average Horizontal Gradient (i) 0.0184 foot/foot Porosity (n) 34.3 percent Velocity = 0.02255 foot/day 8.23 foot/year to Porosity (n) 56.6 percent Velocity = 0.01367 foot/day 4.99 foot/year ASSUMPTIONS: Monitoring Event: June 2015 1. K of 0.421 ft/day based on in -situ slug tests 2. Porosity based on values from Morris and Johnson (1967), Summary of hydrologic and physical properties of rock and soil materials, as analyzed by the hydrologic laboratory of the US Geological Survey, 1948-1960 (No. 1839-D). 3. Porosity values of 34.3 to 56.6 were based on site geologic conditions. Prepared by: RAG Date: Checked: EMB Date: 8/15/2015 015 P:\Duke Energy Progress. 1 026\1 05. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\FINAL\APPENDICESWppendix G\Mayo_Hydraulic_Velocities Duke Energy Progress, LLC - Mayo Steam Electric Plant Water Well ID Elevation (MSL) ABMW-04D 485.06 MW-16D 365.52 MSL - Feet Above Mean Sea Level Depth measurements in feet ABMW-04D to MW-16D DISTANCE CHANGE IN LEVEL GRADIENT 3,965 119.54 0.03015 HORIZONTAL GRADIENT (i): 0.0301 Average Groundwater Velocity (V)* Phase I *Based on the Darcy Equation where velocity equals (K x i) / n Hydraulic Conductivity values (units of ft/day) from Table 6-9 SNumbert Hydrauic ivity /day) iConGeotmeric Well ID Slug Test Measured Mean ABMW-04D I Slug Out I Test 1 5.88E-02 5.88E-02 Test 1 1.57E+00 EEEE�� 1.33E+00 Hydraulic Conductivity (K) 0.2791 foot/day (Geometric Mean of K for ABMW-04D and MW-16D) Average Horizontal Gradient (i) 0.0301 foot/foot Porosity (n) 34.3 percent Velocity = 0.02453 foot/day 8.95 foot/year to Porosity (n) 56.6 percent Velocity = 0.01487 foot/day 5.43 foot/year ASSUMPTIONS: Monitoring Event: June 2015 1. K of 0.2791 ft/day based on in -situ slug tests 2. Porosity based on values from Morris and Johnson (1967), Summary of hydrologic and physical properties of rock and soil materials, as analyzed by the hydrologic laboratory of the US Geological Survey, 1948-1960 (No. 1839-D). 3. Porosity values of 34.3 to 56.6 were based on site geologic conditions. Prepared by: RAG Date: 8/15/2015 Checked: EMB Date: 8/16/2015 P:\Duke Energy Progress. 1 026\1 05. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\FINAL\APPENDICES\Appendix G\Mayo_Hydraulic_Velocities Duke Energy Progress, LLC - Mayo Steam Electric Plant Water Well ID Elevation (MSL) ABMW-04BR 483.42 MW-16BR 365.41 MSL - Feet Above Mean Sea Level Depth measurements in feet ABMW-04BR to MW-16BR DISTANCE CHANGE IN LEVEL GRADIENT 3,965 118.01 0.02976 HORIZONTAL GRADIENT (i): 0.0298 Average Groundwater Velocity (V)* Phase I *Based on the Darcy Equation where velocity equals (K x i) / n Hydraulic Conductivity values (units of ft/day) from Table 6-9 Well ID Slug Test Slug Test Number Hydraulic Conductivit ft/da Measured Geomeric Mean ABMW 04BR Slug Out Test 1 9.46E-03 9.46E-03 MW 16BR Slu Out Test 1 3.17E 03 3.17E-03 Hydraulic Conductivity (K) 0.0055 foot/day (Geometric Mean of K for ABMW-04BR and MW-16BR) Average Horizontal Gradient (i) 0.0298 foot/foot Porosity (n) 4.4 percent Velocity = 0.00370 foot/day 1.35 foot/year to Porosity (n) 56.6 percent Velocity = 0.00029 foot/day 0.11 foot/year ASSUMPTIONS: Monitoring Event: June 2015 1. K of 0.0055 ft/day based on in -situ slug and packer tests 2. Porosity based on values from Morris and Johnson (1967), Summary of hydrologic and physical properties of rock and soil materials, as analyzed by the hydrologic laboratory of the US Geological Survey, 1948-1960 (No. 1839-D). 3. Porosity values of 4.4 to 56.6 were based on site geologic conditions. Prepared by: RAG Date: 8/15/2015 Checked: EMB Date: 8/16/2015 P:\Duke Energy Progress. 1 026\1 05. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\FINAL\APPENDICES\Appendix G\Mayo_Hydraulic_Velocities