Loading...
HomeMy WebLinkAboutNC0038377_Table 12-3 Background Wells GW Results_20150902TABLE 12-3 RISK SCREENING TABLE: BACKGROUND GROUNDWATER DATA MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Redox Assignment PH Water Level Temp Spec Cond DO ORP Turbidity Ferrous Iron Alkalinity Aluminum Antimony Arsenic Barium Beryllium Bi- carbonate AlkalinityDIS Boron Cadmium Calcium Carbonate Alkalinity Chloride Chromium Cr(III)/Cr(VI) Cobalt Copper DIS TOT DIS TOT DIS TOT DIS TOT DIS TOT TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT Reporting Units None S.U. ft Deg C u/cros mg/l mV NTU mg/I mg/I ug/I ug/I ug/l ug/l ug/l ug/l ug/I ug/t ug/I ug/I mg/l ug/I ug/I ug/I ug/l mg/l mg/l mg/l ug/l ug/I ug/l ug/l mg/I mg/l 15A NCAC 02L Standard NE 6.5-8.5 NE NE NE NE NE NE NE NE NE NE NE 1* NE SO NE 700 NE 4* NE NE 700 NE 1 2 NE NE 250 NE 10 NE 1* NE 1 Sample ID Sample Collection Date Field Parameters Analytical Results SAPROLITE MW-12S 06/18/2015 Mixed (oxic-anoxic) 5.7 30.61 21 55 3.66 1 127 1 10.6 <0.5 14 <5 292 1 1 1 <1 I <1 I <1 23 24 <1 <1 14 <50 <50 <1 <1 2.36 <10 1 3.1 <1 1.61 1.02 1.09 <0.001 LLLLL TRANSITION ZONE BG-02 04/13/2015 NM 6.3 31.93 18 652 0.2 -11 7.09 NM 259 NA 136 NA <1 NA <1 NA 54 NA <1 259 NA <50 NA <1 57 <5 28 NA <5 NA <1 NA <0.005 BG-02 DUP 04/13/2015 NM 6.3 31.93 18 652 0.2 -11 7.09 NM 254 NA 215 NA <1 NA <1 NA 55 NA <1 254 NA <50 NA <1 58.1 <5 28 NA <5 NA <1 NA <0.005 BG-02i1i 07/07/2015 NM 6.5 31.53 19 623 0.3 -129 8.51 NM 225 NA 193 NA <1 NA <1 NA 54 NA <1 225 NA <50 NA <1 56.1 <5 30 NA <5 NA <1 NA <0.005 MW-12D(') 06/24/2015 Mixed (oxic-anoxic) 6.2 31.1 17 136 2.42 -1 4.02 0 53 <5 184 1.66 1.63 FT <1 23 26 <1 <1 53 <50 <50 <1 <1 12.6 <10 4 <1 <1 1.28 1.37 <0.001 <0.001 BEDROCK BG-01 04/13/2015 NM 5.5 30.16 17 154 1.2 296 8.9 NM 49.8 NA 392 NA <1 NA <1 NA 90 NA <1 49.8 NA <50 NA <1 12.5 <5 11 NA <5 NA <1 NA <0.005 BG-01 07/07/2015 NM 5.6 29.86 18 151 1.6 113 10 NM 48.3 NA 418 NA <1 NA <1 NA 97 NA <1 48.3 NA <50 NA <1 13.1 <5 11 NA <5 NA <1 NA <0.005 MW-10BR 03/17/2015 Anoxic 7.9 5.33 21 346 0.46 -145 8.89 1.5 110 13 641 <1 <1 <1 <1 25 27 <1 <1 110 <50 <50 <1 <1 36.8 <10 23 <1 1.3 <1 <1 <0.001 <0.001 MW-11BR 06/25/2015 Mixed(oxic-anoxic) 8.1 40.25 19 382 2.79 28 3.91 0 160 16 80 1.61 1.32 <1 <1 46 44 <1 <1 160 <50 <50 <1 <1 49.6 <10 16 1.59 1.73 <1 <1 0.00772 <0.001 MW-14BR 03/12/2015 Mixed (anoxic) 6.7 18.56 14 278 0.47 41 35 0.5 96 9 589 <1 <1 <1 <1 28 30 <1 <1 96 <50 <50 <1 <1 19.5 <10 9.3 <1 <1 1.41 1.41 <0.001 0.0045 Detections/Samples --- --- --- --- --- --- --- --- --- 3/10 SO/SO 2/10 2/10 0/10 0/10 5/10 10/10 0/10 0/10 SO/SO 0/10 0/10 0/10 0/10 10/10 0/10 10/10 1/10 3/10 3/10 3/10 1/10 1/10 Average Background Concentrations (Detections Only) --- --- --- --- --- --- --- --- --- 13 314 1.64 1.48 --- --- 29 50 --- --- 127 --- --- --- --- 31.8 --- 16 1.59 1.5 1.24 1.29 0.00772 0.0045 Maximum Concentration --- --- --- --- --- --- --- --- --- 16 641 1.66 1.63 --- --- 46 97 --- --- 259 --- --- --- --- 58.1 --- 30 1.59 1.73 1.41 1.41 0.00772 0.0045 Number of Backgroundwater Samples > 15A NCAC 2L Standard --- --- --- --- --- --- --- --- --- 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 0 0 Notes: - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013 ORP = Oxidation Reduction Potential mg/I = milligrams per liter ug/I = microgram per liter DIS = Dissolved mg-N/L = milligram nitrogen per liter umhos/cm = micro mhos per centimeter TOT = Total mV = millivolts Spec Cord = Specific Conductance Temp = Temperature NE = Not established NM = Not Measured DO = Dissolved Oxygen NTU = nephelometric turbidity unit ft = feet Deg C = Degree Celsius S.U. = Standard Unit --- = Not applicable NA = Not analyzed < = concentration not detected at or above the reporting limit. * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013. Note 1: Hexavalent Chromium concentration is less than EPA screening value for tapwater (0.035 mg/Q. See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., June 26. 2015). Note 2: Hexavalent Chromium concentration is greater than EPA screening value for tapwater (0.035 ug/L). See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., June 26, 2015). Prepared by: VTV Checked by: RLP P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-3 Background Wells GW Results.xlsx Page 1 of 2 TABLE 12-3 RISK SCREENING TABLE: BACKGROUND GROUNDWATER DATA MAYO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ROXBORO, NC Analytical Parameter Iron Lead Magnesium Manganese Mercury Methane Molybdenum Nickel Nitrate (as N) Potassium Selenium Sodium Strontium Sulfate Sulfide Thallium Tol Dissolved Solids tal oa Tot l Organic Carbon Total T oa Suspended Solids Vanadium Zinc DIS TOT DIS TOT TOT DIS TOT DIS TOT DIS TOT DIS TOT TOT DIS I TOT TOT DIS TOT DIS TOT DIS TOT DIS I TOT Reporting Units ug/l ug/l ug/l ug/l mg/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l mg-N/L mg/l ug/l ug/l mg/l mg/l mg/l mg/l mg/l ug/I ug/l mg/l mg/l mg/l ug/l ug/l mg/l mg/I ISA NCAC 02L Standard NE 300 NE 15 NE NE 50 NE 1 NE NE NE NE 1 100 10 NE NE 20 NE NE NE 250 NE NE 0.2* Soo NE NE NE 0.3* NE 1 Sample ID Sample Collection Date Analytical Results SAPROLITE MW-12S 06/18/2015 <10 295 <1 <1 0.643 1 249 1 267 <0.05 <0.05 <10 I <1 I <1 1 1.35 1 1.45 1 1 1 1.86 1 <1 I <1 1 6.79 1 0.03 1 0.027 1 1.9 1 <0.1 1 <0.2 1 <0.2 1 50 1 0.68 1 <5 1 <0.3 1 0.403 1 0.056 1 0.067 TRANSITION ZONE BG-02 04/13/2015 NA 435 NA <1 11.8 NA ISO NA 0.06 NA NA I <1 NA <5 NA 3.27 NA <1 49.7 NA NA 4.8 NA NA <0.2 380 NA 8 NA NA NA 0.011 BG-02 DUP 04/13/2015 NA 546 NA <1 12.1 NA 155 NA 0.05 NA NA <1 NA <5 NA 3.3 NA <1 50.3 NA NA 4.7 NA NA <0.2 360 NA 7 NA NA NA 0.01 BG-02i1i 07/07/2015 NA 467 NA <1 12 NA 135 NA <0.05 NA NA <1 NA <5 <0.023 3.61 NA <1 48.2 NA NA 5.1 NA NA <0.2 370 NA 8 NA 5.88 NA 0.015 MW-12D(') 06/24/2015 95 326 <1 <1 3.44 674 683 <0.05 <0.05 <10 1.63 1.75 1.82 2.5 0.08 1.6 <1 <1 8.98 0.094 0.095 0.96 <0.1 <0.2 <0.2 120 0.396 <5 0.642 0.719 0.006 <0.005 BEDROCK BG-01 04/13/2015 NA 409 NA <1 3.35 NA 35 NA <0.05 NA NA <1 NA <5 NA 1.4 NA <1 12.4 NA NA 0.32 NA NA <0.2 130 NA 5 NA NA NA 0.029 BG-01 07/07/2015 NA S57 NA <1 3.63 NA 23 NA <0.05 NA NA <1 NA <5 0.64 1.5 NA <1 11.8 NA NA 0.32 NA NA <0.2 130 NA 5 NA 4.94 NA 0.05 MW-10BR 03/17/2015 286 883 <1 <1 15.5 954 894 <0.5 <0.05 <10 2.54 2.37 1.91 3.09 <0.01 8.66 <1 <1 37.9 0.21 0.21 83 <10 <0.2 <0.2 330 2 17 0.861 1.66 0,006 0.009 MW-11BR 06/25/2015 <10 115 <1 <1 11.1 73 67 <0.05 <0.05 <10 5.04 5.41 <1 <1 <0.01 5.03 <1 <1 14.3 0.225 0.2 14 <0.1 <0.2 0.323 250 1.1 <5 2.39 2.69 0.012 <0.005 MW-14BR 03/12/2015 485 907 <1 <1 2.96 543 544 <0.05 <0.05 <10 14.6 14 <1 <1 0.039 4.08 <1 <1 33 0.145 0.149 12 <1 <0.2 <0.2 190 1.3 14 0.758 1.29 0.008 0.01 Detections/Samples 3/10 1 10/10 0/10 0/10 10/10 S/10 10/10 0/10 2/10 0/10 4/10 4/10 3/10 3/10 4/10 10/10 0/10 0/10 10/10 S/10 5/10 10/10 0/10 0/10 1/10 10/10 5/10 7/10 4/10 7/10 5/10 8/10 Average Background Concentrations (Detections Only) 289 494 --- --- 7.65 499 295 --- 0.06 --- 5.95 5.88 1.69 2.35 0.44 3.4 --- --- 27.3 0.141 0.14 12.7 --- --- 0.323 231 1.1 9 1.16 2.51 0.018 0.025 Maximum Concentration 485 907 --- --- 15.5 954 894 --- 0.06 --- 14.6 14 1.91 3.09 1 8.66 --- --- 50.3 0.225 0.21 83 --- --- 0.323 380 2 17 2.39 5.88 0.056 0.067 Number of Backgroundwater Samples > 15A NCAC 2L Standard 0 8 0 0 0 0 8 0 0 0 0 0 0 0 0 0 0 0 0 0 O 0 0 0 1 0 0 0 0 7 0 0 Notes: - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013 ORP = Oxidation Reduction Potential mg/I = milligrams per liter ug/I = microgram per liter DIS = Dissolved mg-N/L = milligram nitrogen per liter umhos/cm = micro mhos per centimeter TOT = Total mV = millivolts Spec Cord = Specific Conductance Temp = Temperature NE = Not established NM = Not Measured DO = Dissolved Oxygen NTU = nephelometric turbidity unit ft = feet Deg C = Degree Celsius S.U. = Standard Unit --- = Not applicable NA = Not analyzed < = concentration not detected at or above the reporting limit. * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013. Note 1: Hexavalent Chromium concentration is less than EPA screening value for tapwater (0.035 mg/Q. See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., June 26. 2015). Note 2: Hexavalent Chromium concentration is greater than EPA screening value for tapwater (0.035 ug/L). See Table 10-3 (USEPA Regional Screening Levels [RSLs] rev., June 26, 2015). Prepared by: VTV Checked by: RLP P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Tables\Draft Tables\Table 12-3 Background Wells GW Results.xlsx Page 2 of 2