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7302_DukeRoxboro_GWAssessmentRepsonse_DIN26992_20160928Belews Creek Steam Station 3191 Pine Hall Road Walnut Cove, NC 27009 336-215-4576 www.duke-energy.com Page 1 of 2 September 28, 2016 North Carolina Department of Environmental Quality Division of Waste Management Solid Waste Section 1646 Mail Service Center Raleigh, North Carolina 28778 Attn: Ms. Elizabeth Werner (submitted electronically via email) Re: Roxboro Steam Electric Plant Industrial Landfill Groundwater Assessment Response Monitoring Wells GMW-6 and GMW-11 Permit No.: 7302-INDUS, Industrial Landfill Roxboro Steam Electric Plant 1700 Dunnaway Road Semora, North Carolina 27343 Person County Dear Ms. Werner, Duke Energy Progress (Duke) received your letter dated June 29, 2016 requesting assessment of groundwater monitoring wells GMW-6 and GMW-11 at the Roxboro Steam Electric Plant (Roxboro) Industrial Landfill (Permit No. 7302-INDUS) located in Person County. Duke would like to inform North Carolina Division of Environmental Quality (NCDEQ) Division of Waste Management (DWM) that the Roxboro Steam Electric Plant landfill and compliance boundary fall completely within the compliance boundary of the Roxboro East Ash Basin. The East Ash Basin is actively undergoing assessment in accordance with the North Carolina General Assembly Session Law 2014-122, North Carolina Coal Ash Management Act (CAMA) of 2014. Since the area beneath and surrounding the landfill is already being assessed under jurisdiction of NCDEQ Division of Water Resources (DWR), additional assessment of monitoring wells GMW-11 and GMW-6 noted in your letter dated June 29, 2016 are not warranted. CAMA assessment reports for the Roxboro East Ash Basin have been submitted to NCDEQ DWR as follows: • Comprehensive Site Assessment September 2, 2015 • Corrective Action Plan Part 1 December 1, 2015 • Corrective Action Plan Part 2 February 29, 2016 • Comprehensive Site Assessment Supplement August 1, 2016 • Supplemental Assessment Response August 19, 2016 Additional wells have been installed downgradient of the landfill in accordance with requirements of CAMA. Details and findings for wells in the area downgradient of the landfill www.duke-energy.com Page 2 of 2 in addition to a deep well installed near Solid Waste monitoring well GMW-8 are provided as reference in the attached report. If you require any additional information, please contact me at (336) 215-4576 or kimberlee.witt@duke-energy.com. Respectfully submitted, Kimberlee Witt, PE Environmental Services Attachments: Monitoring Wells GMW-6 and GMW-11 Assessment Response, Synterra, 9/28/2016 cc (via e-mail): Ed Mussler, NCDEQ Rob Miller, Duke Energy Robert Howard, Duke Energy Ed Sullivan, Duke Energy INNOVATE 148 River Street, Suite 220 Greenville, SC 29601 (864) 421-9999 Fax (864) 421-9909 www.synterracorp.com September 28, 2016 Ms. Kimberlee Witt, P.E. Duke Energy Progress, LLC Sr. Engineer – Environmental Services 3191 Pine Hall Road Walnut Cove, NC 27009 SUBJECT: Monitoring Wells GMW-6 and GMW-11 Assessment Response Roxboro Industrial Waste Landfill Permit 7302-INDUS-1988 Semora, North Carolina Dear Ms. Witt: SynTerra is in receipt of the NCDEQ Waste Management correspondence, dated June 29, 2016 (E. Werner, NCDEQ, to K. Witt, Duke Energy Progress, LLC) regarding noted exceedances above 15A NCAC 2L .0202 groundwater standards (2L Standards) in samples collected from GMW-6 and GWM-11. The constituent exceedances include boron, selenium, sulfate and total dissolved solids (TDS) in GMW-6 and boron, selenium and TDS in GMW-11. DEQ noted these wells are at (GMW-11) and beyond (GMW-6) the compliance boundary and that industrial landfills are required to comply with 2L standards at the compliance boundary in accordance with 15A NCAC 13B .0503 (2)(d)(iv). This letter response is provided to address concerns regarding the observed 2L exceedances and summarize findings of monitoring wells, which are a part of other assessment activities onsite in the area of concern. SOLID WASTE LANDFILL COMPLIANCE BOUNDARY In review of the solid waste landfill boundary, well GMW-6 and GMW-11 are located approximately 50 feet and 90 feet, respectively, from the landfill waste boundary which is within the compliance boundary established at 250 feet from the lined and/or unlined landfill, as permitted under #7302-INDUS-1988, located on top of the East Ash Basin (Figure 1). Therefore, the indication that GMW-6 and GMW-11 are “at (GMW-11) and beyond (GWM-6) the compliance boundary” is inaccurate. Monitoring Wells GMW-6 and GMW-11 Assessment Response September 28, 2016 Roxboro Steam Station, Duke Energy Progress, LLC SynTerra P:\Duke Energy Progress.1026\07.ROXBORO PLANT\17.April 2016 Landfill Solid Waste GW Compliance and Monitoring\Solid Waste Landfill Assessment Response, Landfill #7302-INDUS, Roxboro, NC.docx SUMMARY OF ADDITIONAL ASSESSMENT WELLS IN AREA OF CONCERN As shown on Figure 1, there are various monitoring wells undergoing sampling and analysis for other onsite assessment activities. Monitoring well cluster, MW-22, located north of the landfill and downgradient of GMW-6 and GMW-11, and monitoring well MW-21BRL, located adjacent to the Solid Waste compliance monitoring well GMW-8, were installed as a part of the Ash Basin assessment work under the Coal Ash Management Act of 2014 (CAMA). A summary of analytical results to date are presented below. MW-22D/MW-22BR/MW-22BRL The monitoring well cluster, MW-22D, MW-22BR, and MW-22BRL, is located north of the landfill, approximately 50 feet downgradient of the landfill compliance boundary and 300 feet downgradient from GMW-10 and 450 feet downgradient from GMW-11 (Figure 1). The MW-22 well cluster was installed to evaluate potential source impacts from ash used as structural fill below the gypsum pad and assess impacts downgradient from the East Ash Basin to address data gap concerns following the CAMA Comprehensive Site Assessment (CSA) activities. Details regarding well installation, lithology, groundwater sampling procedures and analytical results were provided to the NCDEQ Division of Water Resources (DWR) in a CSA Supplement 1 report, dated August 1, 2016. In summary, packer testing was conducted on a pilot borehole in which water bearing fractures were observed in zones ranging from 48 feet bgs to 302 feet below ground surface (bgs). Based on the packer test results, a deeper bedrock well, MW-22BRL, was screened from 290 to 300 feet bgs with a tested flow rate of 1.22 gpm. An upper bedrock well, MW-22BR, was screened from 60-70 bgs with an observed flow rate of 0.13 gpm. A saprolite well, MW-22D, was installed at the top of bedrock with a screen set from 26-36 feet bgs. The general lithology consisted of saturated saprolitic clayey and silty sands to a depth 32 feet bgs followed by an interlayered granitic schist, dioritic gneiss, and granitic gneiss. As a comparison, GMW- 6 and GMW-11, which were installed in March and September 2002, respectively, were screened in the transition zone/upper bedrock with screens set from 35-45 feet below ground surface (bgs). Groundwater samples were collected from MW-22D and MW-22BR on June 20, 2016. A sample was not collected from MW-22BRL owing to a very slow recharge rate (weeks) contrary to packer test results from the screened zone. MW-22BRL was subsequently converted to a piezometer. Analytical results indicated several constituents detected above 2L or IMAC including cobalt, iron, manganese, selenium, sulfate, TDS and vanadium in MW-22D and chromium, cobalt, manganese, sulfate, TDS and vanadium in MW-22BR. In comparison to provisional background concentrations as developed as Monitoring Wells GMW-6 and GMW-11 Assessment Response September 28, 2016 Roxboro Steam Station, Duke Energy Progress, LLC SynTerra P:\Duke Energy Progress.1026\07.ROXBORO PLANT\17.April 2016 Landfill Solid Waste GW Compliance and Monitoring\Solid Waste Landfill Assessment Response, Landfill #7302-INDUS, Roxboro, NC.docx part of the CAMA CSA, the manganese, selenium, sulfate, and TDS concentrations in MW-22D and the sulfate and TDS in MW-22BRL were above provisional background levels. However, there is a noted decrease in constituent concentrations of selenium, sulfate and TDS vertically with depth as evident between MW-22D and MW-22BR. Boron was detected in both wells; however, below the 2L with a concentration of 377 µg/L in the transition zone (MW-22D) and 452 µg/L in the upper bedrock (MW-22BR). Based on the measured water level elevations, a downward vertical gradient was determined between the MW-22 transition zone, upper and lower bedrock wells. In comparison to the most recent (April 2016) groundwater samples collected from GMW-6 and GMW-11, higher selenium, sulfate, and TDS concentrations were evident in the MW-22D as opposed to GMW-6 and GMW-11. GMW-6, GMW-11 and MW-22D are screened in the same transition zone/upper bedrock regime in that area with MW- 22D positioned downgradient of the two Solid Waste compliance wells. This observation suggests the potential for influences from exposed FGD gypsum stored on the gypsum pad from rainfall infiltration and potential leaching. It has been documented that CCR residuals, including FGD gypsum, is typically enriched with various elements including arsenic, boron, selenium and strontium with potential for leaching (Characterization of Coal Combustion Residues from Electric Utilities – Leaching and Characterization Data, EPA-600/R-09/151, December 2009). Of note, boron concentrations did show a significant reduction from the landfill compliance wells (GMW-6/GMW-11) toward the gypsum pad (MW-22D). As well, elevated boron concentrations are present in ash pore water in the East Ash Basin (6,220 µg/L, ABMW-7) which is located upgradient of GMW-6 (2,270 µg/L). Groundwater monitoring of the MW-22 cluster continues under jurisdiction of the NCDEQ DWR CAMA program to evaluate constituent trends sourced from either the East Ash Basin and/or the gypsum pad. Additional assessment activities are planned for the gypsum pad including the installation of additional monitoring well clusters downgradient of the gypsum pad. GMW-8/MW-21BRL GMW-8 was installed in March 2002 into the upper bedrock with a screen set from 53- 63 feet bgs. Historical analytical data shows an increasing trend for several constituents including boron, chloride and manganese since November 2014. MW-21BRL was installed to serve as a companion well to GMW-8 to assess the vertical extent of impacts to the bedrock. The MW-21BRL borehole was installed using rotosonic methods in April 2016. The boring was drilled to a depth of 297 feet bgs with bedrock, consisting of granitic schist, gabbroic gneiss, and meta diorite, encountered at 32 feet bgs. Packer Monitoring Wells GMW-6 and GMW-11 Assessment Response September 28, 2016 Roxboro Steam Station, Duke Energy Progress, LLC SynTerra P:\Duke Energy Progress.1026\07.ROXBORO PLANT\17.April 2016 Landfill Solid Waste GW Compliance and Monitoring\Solid Waste Landfill Assessment Response, Landfill #7302-INDUS, Roxboro, NC.docx testing was conducted on fractures zones from 120 feet to 296 feet bgs. No water bearing fractures greater than 0.05 gpm were determined with the exception of a fracture zone from 140-150 feet bgs yielding 0.1 gpm. Therefore, a 15-foot pre-packed screen was set from 143 to 158 feet bgs. The remaining depth of the borehole was backfilled with hydrated bentonite chips. Lithologic descriptions and well construction information for MW-21BRL were provided in the CSA Supplement 1 report, dated August 1, 2016. Routine Solid Waste compliance groundwater sampling was conducted on GMW-8 on July 12, 2016. On July 14, 2016, a groundwater sample was collected from MW-21BRL for CSA parameters. A second groundwater sample was collected from MW-21BRL on July 28. 2016. Water level measurements indicate a significant downward vertical gradient between the two companion wells (483.62 feet msl (GMW-8) versus 405.38 feet msl (MW-21BRL)); however, it should be noted that recharge in MW-21BRL is extremely slow and may not reflect equilibrium conditions. In review of the analytical data, marked reductions for several constituents are noted between GMW-8 and MW-21BRL including boron (4900 µg/L (GMW-8) versus <50 µg/L (MW-21BRL)); chloride (248 mg/L (GMW-8) versus 5 mg/L (MW-21BRL)); manganese (115 µg/L (GMW-8) versus < 5 µg/L (MW-21BRL)); sulfate (712 mg/L (GMW-8) versus 170 mg/L (MW-21BRL)); and TDS (1840 mg/L (GMW-8) versus 170 mg/L (MW-21BRL)). A summary of the analytical data for GMW-8 and MW-21BRL is provided in Table 1. The analytical data suggest very limited to no downward migration of CCR constituents in the vicinity of GMW-8/MW-21BRL. Solid Waste compliance monitoring will continue for GMW-8 with the next compliance sampling event planned for November 2016. If you have any questions or require additional information, please contact me at 864.527.4642 or via email at ceady@synterracorp.com. Sincerely, Craig D. Eady, LG #1599 Project Manager G M W - 1 1 G M W - 1 0 G M W - 6 M W - 1 B R C W - 1 G M W - 8 G M W - 9 M W - 2 1 B R L G M W - 7 LP-3 L P - 2 L P - 1 LP-4 L P - 6 L P - 5 E A S T E R N E X T E N S I O N I M P O U N D M E N T P Z - 1 2 M W - 1 3 B R S D - 0 6 - O S M W - 2 3 B R EAST ASH BASINABMW-6BRABMW-6 ABM W - 4 A B M W - 4 B R C H A R A T R A I L E R S A B M W - 7 ABM W - 7 B R A B M W - 7 B R L PZ-14ABMW-5ABMW-5D COOLING TOWERINTAKE POND COOLING TOWER PONDGMW-2GMW-2 A GMW-1GMW-1A M W - 1 4 S M W - 1 4 D M W - 1 4 B R R A I L R O A D M W - 3 B R M W - 2 2 D M W - 2 2 B R L M W - 2 2 B R WATER INTAKE BASIN F I G U R E 1 S O L I D W A S T E C O M P L I A N C E B O U N D A R Y I N D U S T R I A L W A S T E L A N D F I L L # 7 3 0 2 - I N D U S D U K E E N E R G Y P R O G R E S S R O X B O R O S T E A M E L E C T R I C P L A N T S E M O R A , N O R T H C A R O L I N A APRIL 17, 2014 AERIAL PHOTOGRAPH OBTAINED FROM WSP GROUPSOURCE:CCR SURFACE IMPOUNDMENT DUKE ENERGY PROGRESS PARCEL LINECCR SURFACE IMPOUNDMENT COMPLIANCE BOUNDARY UNLINED LANDFILL LINED LANDFILLSOLID WASTE LANDFILL COMPLIANCE BOUNDARY LEGEND 1 4 8 R I V E R S T R E E T , S U I T E 2 2 0 G R E E N V I L L E , S O U T H C A R O L I N A 2 9 6 0 1 P H O N E 8 6 4 - 4 2 1 - 9 9 9 9 w w w . s y n t e r r a c o r p . c o m P R O J E C T M A N A G E R : L A Y O U T : D R A W N B Y : C R A I G E A D Y D A T E : J O H N C H A S T A I N F I G 1 ( S O L I D W A S T E B O U N D ) 0 9 / 2 7 / 2 0 1 6 0 9 / 2 8 / 2 0 1 6 1 0 : 0 4 A M P : \ D u k e E n e r g y P r o g r e s s . 1 0 2 6 \ 0 7 . R O X B O R O P L A N T \ 1 7 . A p r i l 2 0 1 6 L a n d f i l l S o l i d W a s t e G W C o m p l i a n c e A n d M o n i t o r i n g \ F i g u r e s \ D E R O X B O R O C O M B I N E D S W M B O U N D A R Y . d w g D A T E P R I N T E D : L A N D F I L L G Y P S U M P A D M W - 2 0 B R L M W - 2 5 B R M W - 1 7 B R M W - 2 4 B R MW-2BR MW-11BR M W - 1 6 B R MW-5DMW-5BRCW-5DUNNAWAY RD GUARD HOUSECW-1COMPLIANCE MONITORING WELL (SURVEYED)PZ-12PIEZOMETER (SURVEYED)ABMW-2CSA MONITORING WELL (SURVEYED)MW-2MONITORING WELL (SURVEYED)LEACHATE COLLECTION POINT (APPROXIMATE)LP-6 GMW-8LANDFILL MONITORING WELL (SURVEYED)SOLID WASTE LANDFILL REVIEW BOUNDARY 2 5 0 0 2 5 0 5 0 0 G R A P H I C S C A L E I N F E E T TABLE 1 ROXBORO ANALYTICAL GROUNDWATER COMPARISON - GMW-8 AND MW-21BRL ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Aluminum Aluminum Antimony Antimony Arsenic Arsenic Barium DIS TOT DIS TOT DIS TOT DIS S.U.ft Deg C umhos/cm mg/l mV mV NTUs mg/l mg/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l 6.5 - 8.5 NE NE NE NE NE NE NE NE NE NE NE NE 1*NE 10 NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE 10 NE Sample ID Sample Collection Date GMW-8 12/19/2002 7.0 49.69 NA 1260 NA NA NA NA NA NA NA NA NA NA NA <5 NA GMW-8 05/29/2003 7.0 46.22 NA 1340 NA NA NA NA NA NA NA NA NA NA NA <5 NA GMW-8 11/12/2003 NA NA NA 1500 NA NA NA NA NA NA NA NA NA NA NA <5 NA GMW-8 05/25/2004 NA NA NA 1760 NA NA NA NA NA NA NA NA NA NA NA 8 NA GMW-8 11/17/2004 6.6 48.75 NA 1820 NA NA NA NA NA NA NA NA NA NA NA 6 NA GMW-8 05/18/2005 6.6 43.35 NA 1600 NA NA NA NA NA NA NA NA NA NA NA 3 NA GMW-8 11/16/2005 6.3 45.4 NA 1300 NA NA NA NA NA NA NA NA NA NA NA <5 NAGMW-8 05/22/2006 6.0 45.85 NA 1560 NA NA NA NA NA NA NA NA NA NA NA <3 NA GMW-8 11/15/2006 6.5 45.56 NA 1740 NA NA NA NA NA NA NA NA NA NA NA 3 NA GMW-8 05/23/2007 6.6 50 NA 1500 NA NA NA NA NA NA NA NA NA NA NA <3 NAGMW-8 11/06/2007 6.6 50 NA 1810 NA NA NA NA NA NA NA NA NA NA NA 6 NA GMW-8 05/22/2008 6.6 54.3 NA 1700 NA NA NA NA NA NA NA NA NA NA NA <2 NA GMW-8 11/19/2008 6.7 52.91 NA 1700 NA NA NA NA NA NA NA NA NA NA NA <2.8 NAGMW-8 05/07/2009 6.8 52.12 NA 1700 NA NA NA NA NA NA NA NA NA NA NA <2.8 NA GMW-8 11/10/2009 6.7 52.45 NA 1800 NA NA NA NA NA NA NA NA NA NA NA <2.8 NA GMW-8 05/24/2010 6.3 49.3 NA 1840 NA NA NA NA NA NA NA NA NA NA NA 0.91 NA GMW-8 11/17/2010 7.1 42.95 19.4 1782 NA NA NA 2.9 NA NA NA NA NA NA NA <0.5 NA GMW-8 04/19/2011 6.5 44.09 17.57 1572 2.24 -37.9 167.1 4.11 NA NA NA NA NA NA NA <5 NA GMW-8 DUP 04/19/2011 6.5 44.09 17.57 1572 2.24 -37.9 167.1 4.11 NA NA NA NA NA NA NA <5 NA GMW-8 11/01/2011 6.9 45.97 19.33 1368 0.52 -32.2 172.8 6.47 NA NA NA NA NA NA NA <5 NA GMW-8 04/03/2012 6.4 46.26 18.13 1245 0.57 -55.2 149.8 6.91 NA NA NA NA NA NA NA <5 NA GMW-8 11/08/2012 6.6 47.59 14.93 1423 1.83 188.8 393.8 8.22 NA NA NA NA NA NA NA <5 NA GMW-8 04/09/2013 6.5 47.24 17.4 1590 0.52 124.8 329.8 2.06 NA NA NA NA NA NA NA <1 NA GMW-8 11/12/2013 6.6 46.12 14 1742 0.23 153 358 8.5 NA NA NA NA NA NA NA <1 NA GMW-8 04/03/2014 6.6 45.78 19 1865 0.4 228 433 9.8 NA NA NA NA NA NA NA <1 NA GMW-8 11/10/2014 6.6 45.01 18 2014 0.2 135 340 6.25 NA NA NA NA NA NA NA <1 NA GMW-8 04/21/2015 6.5 44.8 17 2857 0.3 157 362 5.53 NA NA NA NA NA NA NA <1 NA GMW-8 09/15/2015 6.5 45.99 18.4 2625 0.9 95.7 300.7 4.99 0 340 <5 62 1.23 1.44 <1 <1 60 GMW-8 11/05/2015 6.5 46.39 19.3 2809 0.4 98.5 303.5 5.03 NA NA NA NA NA NA NA 0.452 j NAGMW-8 04/06/2016 6.5 45.38 17 2602 0.28 226.7 431.7 4.91 NA NA NA NA NA NA NA 0.217 j NA GMW-8 07/12/2016 NA NA NA NA NA NA NA NA NA NA <5 NA <1 NA <1 0.255 J 57 MW-21BRL 07/14/2016 11.3 124.21 19.6 526.5 3.86 -66.8 138.2 9.67 NA 154 130 NA <1 NA <1 NA 52 MW-21BRL 07/28/2016 11.0 139.04 26 486.9 5.88 -63.3 141.7 14.6 NM 127 6 706 <1 <1 <1 1.31 74 Notes: * = Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April 1, 2013. SWSL - the Solid Waste Section Limit. NCDENR defines the SWSL as the lowest amount of analyte in a sample that can be quantitatively determined with suitable precision and accuracy. NE - Not Established S.U. - Standard Units Analytical Results Filter Analytical Parameter Reporting Units Field Parameters pH Water Level Temperature Specific Conductance Dissolved oxygen Oxidation Reduction Potential Eh Turbidity Ferrous Iron Alkalinity SWSL 15A NCAC 02L Standard P:\Duke Energy Progress.1026\07.ROXBORO PLANT\17.April 2016 Landfill Solid Waste GW Compliance and Monitoring\Table 1 GMW8 vs MW21BRL Analytical Results Comparison Table page 1 of 5 TABLE 1 ROXBORO ANALYTICAL GROUNDWATER COMPARISON - GMW-8 AND MW-21BRL ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Barium Beryllium Beryllium Boron Boron Cadmium Cadmium Calcium Chromium (Hexavalent)Chromium Chromium TOT DIS TOT DIS TOT DIS TOT TOT TOT DIS TOT ug/l ug/l ug/l mg/l mg/l ug/l ug/l ug/l ug/l mg/l mg/l mg/l ug/l ug/l ug/l 700 NE 4*NE NE NE 700 NE 2 NE NE 250 NE NE 10 100 NE NE NE NE NE NE NE 1 NE NE NE NE NE 20 Sample ID Sample Collection Date GMW-08 12/19/2002 54 NA NA NA <2 NA NA NA <2 NA NA 66.2 NA NA <5 GMW-08 05/29/2003 59 NA NA NA <2 NA NA NA <2 NA NA 80.6 NA NA <5 GMW-08 11/12/2003 53 NA NA NA <2 NA NA NA <2 NA NA 85.9 NA NA <5 GMW-08 05/25/2004 76 NA NA NA <2 NA NA NA <2 NA NA 90.5 NA NA <5 GMW-08 11/17/2004 61 NA NA NA <2 NA NA NA <2 NA NA 99.1 NA NA <5 GMW-08 05/18/2005 47 NA NA NA <2 NA NA NA <2 NA NA 111 NA NA <5 GMW-08 11/16/2005 45 NA NA NA <2 NA NA NA <2 NA NA 113 NA NA <5GMW-08 05/22/2006 174 NA NA NA <2 NA NA NA <2 NA NA 120 NA NA <5 GMW-08 11/15/2006 55 NA NA NA <2 NA NA NA <2 NA NA 120 NA NA 5 GMW-08 05/23/2007 230 NA NA NA <2 NA NA NA <2 NA NA 124 NA NA 11GMW-08 11/06/2007 464 NA NA NA <2 NA NA NA <2 NA NA 115 NA NA 9 GMW-08 05/22/2008 48.4 NA NA NA <2 NA NA NA <5 NA NA 120 NA NA <2 GMW-08 11/19/2008 49.1 NA NA NA <2 NA NA NA <0.36 NA NA 100 NA NA <1GMW-08 05/07/2009 49.8 NA NA NA <2 NA 2750 NA 0.2 NA NA 97 NA NA <0.7 GMW-08 11/10/2009 38.5 NA NA NA <2 NA 2360 NA <0.36 NA NA 87 NA NA 2 GMW-08 05/24/2010 48.3 NA NA NA <2 NA 2660 NA 0.08 NA NA 73.8 NA NA <0.5 GMW-08 11/17/2010 51 NA NA NA <2 NA 2590 NA <0.08 NA NA 71.9 NA NA 23.8 GMW-08 04/19/2011 54.4 NA NA NA <2 NA 1870 NA 0.092 NA NA 74.7 NA NA 8.6 GMW-08 DUP 04/19/2011 53.4 NA NA NA <2 NA 1900 NA 0.11 NA NA 74.5 NA NA 8.2 B GMW-08 11/01/2011 48.5 NA NA NA <2 NA 1970 NA <0.08 NA NA 80.1 NA NA 7.7 GMW-08 04/03/2012 43.4 NA NA NA <2 NA 1980 NA 0.071 J NA NA 82.1 NA NA 8.8 B GMW-08 11/08/2012 48.6 NA NA NA <2 NA 1750 NA 0.033 J NA NA 76 NA NA 4.4 JB GMW-08 04/09/2013 41 NA NA NA <2 NA 1680 NA <1 NA NA 73 NA NA <5 GMW-08 11/12/2013 53 NA NA NA <2 NA 2460 NA <1 NA NA 67 NA NA <5 GMW-08 04/03/2014 51 NA NA NA <2 NA 2680 NA <1 NA NA 78 NA NA <5 GMW-08 11/10/2014 56 NA NA NA <2 NA 3060 NA <1 NA NA 190 NA NA <5 GMW-08 04/21/2015 69 NA NA NA NA NA 4050 NA <1 NA NA 300 NA NA <5 GMW-08 09/15/2015 64 <1 <1 340 NA 4070 4240 <1 <1 303 <10 290 NA <1 <1 GMW-08 11/05/2015 65.4 NA NA NA NA NA 4710 NA <0.101 NA NA 305 B2 NA NA 0.777 jGMW-08 04/06/2016 61.7 NA NA NA NA NA 5350 NA <1 NA NA 273 NA NA <5 GMW-08 07/12/2016 56 <1 NA NA <2 5030 4900 <1 <1 NA NA 248 <0.03 <1 13.5 MW-21BRL 07/14/2016 NA <1 NA 154 NA <50 NA <1 NA NA <5 NA 2 2.57 NA MW-21BRL 07/28/2016 44 <1 <1 102 NA <50 <50 <1 <1 7.69 24.2 5 0.81 <1 5.52 Analytical Parameter Filter Reporting Units Analytical Results Carbonate Alkalinity Bicarbonate Alkalinity BOD Chloride 15A NCAC 02L Standard SWSL P:\Duke Energy Progress.1026\07.ROXBORO PLANT\17.April 2016 Landfill Solid Waste GW Compliance and Monitoring\Table 1 GMW8 vs MW21BRL Analytical Results Comparison Table page 2 of 5 TABLE 1 ROXBORO ANALYTICAL GROUNDWATER COMPARISON - GMW-8 AND MW-21BRL ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Cobalt Cobalt Copper Copper Iron Iron Lead Lead Magnesium Manganese Manganese Mercury Mercury DIS TOT DIS TOT DIS TOT DIS TOT TOT DIS TOT DIS TOT ug/l ug/l mg/l ug/l ug/l mg/l ug/l ug/l ug/l ug/l mg/l ug/l ug/l ug/l ug/l NE 1 1*NE 1 NE NE 300 NE 15 NE NE 50 NE 1 NE NE NE NE 10 2 NE 300 NE 10 NE NE 50 NE 0.2 Sample ID Sample Collection Date GMW-08 12/19/2002 NA NA 18 NA 2 0.2 NA 187 NA <5 NA NA 449 NA <0.2 GMW-08 05/29/2003 NA NA 13 NA <5 0.11 NA 110 NA <5 NA NA 122 NA <0.2 GMW-08 11/12/2003 NA NA <10 NA 3 0.14 NA 68 NA <5 NA NA 156 NA <0.2 GMW-08 05/25/2004 NA NA <10 NA 3 0.11 NA 324 NA <5 NA NA 290 NA <0.2 GMW-08 11/17/2004 NA NA 12 NA 7 0.11 NA 203 NA <5 NA NA 263 NA <0.2 GMW-08 05/18/2005 NA NA 11.2 NA 4 0.15 NA 847 NA 126 NA NA 128 NA <0.2 GMW-08 11/16/2005 NA NA 11.2 NA 4 0.17 NA 50 NA <3 NA NA 129 NA <0.2GMW-08 05/22/2006 NA NA 20.8 NA <2 0.16 NA 676 NA <5 NA NA 82 NA <0.2 GMW-08 11/15/2006 NA NA <10 NA <2 0.11 NA 1080 NA <5 NA NA 103 NA <2 GMW-08 05/23/2007 NA NA 11.2 NA 4 0.11 NA 540 NA <5 NA NA 58 NA <0.2GMW-08 11/06/2007 NA NA 13.4 NA 7 0.14 NA 1210 NA <5 NA NA 57 NA <2 GMW-08 05/22/2008 NA NA 22 NA 1.2 0.12 NA <20 NA <2 NA NA 48.4 NA <0.11 GMW-08 11/19/2008 NA NA 21 NA <1.6 0.12 NA <22 NA <1.9 NA NA 47.6 NA <0.11GMW-08 05/07/2009 NA NA 14 NA <0.81 0.17 NA <31 NA 3.4 NA NA 36.3 NA <0.11 GMW-08 11/10/2009 NA NA 6.9 NA <1.6 0.18 NA <22 NA <1.9 NA NA 28.8 NA <0.054 GMW-08 05/24/2010 NA NA 46 NA 3700 0.1 NA <4.5 NA <0.1 NA NA 36 NA <0.2 GMW-08 11/17/2010 NA NA <25 NA 2.5 3.3 NA 168 NA 0.11 NA NA 80.6 NA <0.2 GMW-08 04/19/2011 NA NA <25 NA 19.2 <0.5 NA 71.3 NA <5 NA NA 30.5 NA <0.2 GMW-08 DUP 04/19/2011 NA NA 27 NA 21.6 <0.5 NA 74 NA <5 NA NA 31 NA <0.2 GMW-08 11/01/2011 NA NA <25 NA <5 <0.5 NA 166 NA <5 NA NA 33.9 NA <0.2 GMW-08 04/03/2012 NA NA <25 NA 3.4 JB <0.5 NA 203 NA <5 NA NA 25.8 B NA <0.2 GMW-08 11/08/2012 NA NA <25 NA 3.6 JB <0.5 NA 126 B NA <5 NA NA 36.7 NA <0.2 GMW-08 04/09/2013 NA NA <20 NA <5 <1 NA 21 NA <1 NA NA 30 NA <0.05 GMW-08 11/12/2013 NA NA <20 NA <5 <1 NA 230 NA <1 NA NA 46 NA <0.05 GMW-08 04/03/2014 NA NA <20 NA <5 <1 NA 195 B NA <1 NA NA 41 NA <0.05 GMW-08 11/10/2014 NA NA <20 NA <5 <1 NA 127 B NA <1 NA NA 46 NA <0.05 GMW-08 04/21/2015 NA NA NA NA <5 <1 NA 332 NA <1 NA NA 62 NA <0.05 GMW-08 09/15/2015 <1 <1 NA 2.24 2.84 NA <10 78 <1 <1 125 60 62 <0.05 <0.05 GMW-08 11/05/2015 NA NA NA NA <1 0.399 j NA 100 NA 0.0757 j NA NA 64.2 NA <0.006GMW-08 04/06/2016 NA NA NA NA <5 <1 NA 69.7 NA 0.0744 j NA NA 61 NA <0.05 GMW-08 07/12/2016 <1 NA 16.3 J 2.36 <5 <1 <10 90.8 <1 0.124 J NA 167 115 <0.05 M2 0.035 J MW-21BRL 07/14/2016 <1 NA NA 4.35 NA NA <10 NA <1 NA NA <5 NA <0.05 NA MW-21BRL 07/28/2016 <1 <1 NA 10.9 1.11 NA <10 259 1.81 <1 2.85 <5 <5 <0.05 <0.05 Analytical Results Analytical Parameter Filter Reporting Units COD Fluoride 15A NCAC 02L Standard SWSL P:\Duke Energy Progress.1026\07.ROXBORO PLANT\17.April 2016 Landfill Solid Waste GW Compliance and Monitoring\Table 1 GMW8 vs MW21BRL Analytical Results Comparison Table page 3 of 5 TABLE 1 ROXBORO ANALYTICAL GROUNDWATER COMPARISON - GMW-8 AND MW-21BRL ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Molybdenum Molybdenum Nickel Nickel Potassium Selenium Selenium Silver Sodium Strontium DIS TOT DIS TOT TOT DIS TOT TOT TOT DIS ug/l ug/l ug/l ug/l ug/l mg-N/L mg-N/L mg/l mg/l ug/l ug/l ug/l mg/l ug/l NE NE NE NE 100 10 NE NE NE NE 20 NE NE NE NE NE NE NE 50 10 NE NE NE NE 10 10 NE NE Sample ID Sample Collection Date GMW-08 12/19/2002 NA NA NA NA NA NA NA <0.02 NA NA <2 <5 NA NA GMW-08 05/29/2003 NA NA NA NA NA NA NA 0.03 NA NA 12 <5 NA NA GMW-08 11/12/2003 NA NA NA NA NA NA NA <0.02 NA NA 15 <5 NA NA GMW-08 05/25/2004 NA NA NA NA NA NA NA <0.02 NA NA 23 <5 NA NA GMW-08 11/17/2004 NA NA NA NA NA NA NA <0.02 NA NA 17 <5 NA NA GMW-08 05/18/2005 NA NA NA NA NA NA NA 0.03 NA NA 13 <5 NA NA GMW-08 11/16/2005 NA NA NA NA NA NA NA 0.09 NA NA <5 <2 NA NAGMW-08 05/22/2006 NA NA NA NA NA NA NA 0.16 NA NA 10 <5 NA NA GMW-08 11/15/2006 NA NA NA NA NA NA NA 0.14 NA NA 13 <5 NA NA GMW-08 05/23/2007 NA NA NA NA NA NA NA 0.19 NA NA 12 <5 NA NAGMW-08 11/06/2007 NA NA NA NA NA NA NA 0.15 NA NA 16 <5 NA NA GMW-08 05/22/2008 NA NA NA NA NA NA NA 0.21 NA NA <2 <2 NA NA GMW-08 11/19/2008 NA NA NA NA NA NA NA 0.17 NA NA <2.7 <1.9 NA NAGMW-08 05/07/2009 NA NA NA NA 1.4 NA NA 0.14 NA NA <3.4 4.1 NA NA GMW-08 11/10/2009 NA NA NA NA <1.8 NA NA 0.16 NA NA <2.7 2.3 NA NA GMW-08 05/24/2010 NA NA NA NA <1.7 NA NA <0.1 NA NA 2.7 <0.5 NA NA GMW-08 11/17/2010 NA NA NA NA 14.4 NA NA 1.7 NA NA <0.5 <0.5 NA NA GMW-08 04/19/2011 NA NA NA NA 5.2 NA NA 0.21 NA NA <10 0.61 JB NA NA GMW-08 DUP 04/19/2011 NA NA NA NA 5.8 NA NA 0.21 NA NA <10 0.52 JB NA NA GMW-08 11/01/2011 NA NA NA NA 5.9 NA NA <0.2 NA NA <10 <5 NA NA GMW-08 04/03/2012 NA NA NA NA 5.3 NA NA 0.21 NA NA <10 1.1 JB NA NA GMW-08 11/08/2012 NA NA NA NA <5 NA NA 0.25 B NA NA <10 1.5 JB NA NA GMW-08 04/09/2013 NA NA NA NA <5 NA NA 0.22 NA NA <1 <5 NA NA GMW-08 11/12/2013 NA NA NA NA <5 NA NA 0.26 NA NA <1 <5 NA NA GMW-08 04/03/2014 NA NA NA NA <5 NA NA 0.13 NA NA <1 <5 NA NA GMW-08 11/10/2014 NA NA NA NA <5 NA NA 0.13 NA NA <1 <5 NA NA GMW-08 04/21/2015 NA NA NA NA <5 NA NA 0.15 NA NA <1 <5 NA NA GMW-08 09/15/2015 <10 3.25 3.35 1.12 <1 NA 0.126 NA 11.1 <1 1.03 NA 87.3 1310 GMW-08 11/05/2015 NA NA NA NA 2.33 j 0.155 NA <1 NA NA 0.267 j 1.34 j NA NAGMW-08 04/06/2016 NA NA NA NA <5 0.112 NA NA NA NA 0.103 j <5 NA NA GMW-08 07/12/2016 126 3.15 NA <1 7.88 0.194 0.146 <1 NA <1 <1 <5 NA 1210 MW-21BRL 07/14/2016 <10 5.84 NA <1 NA NA 0.012 NA NA <1 NA NA NA 273 MW-21BRL 07/28/2016 <10 6.2 4.86 <1 1.6 NA 0.013 NA 12.7 <1 <1 NA 39 332 Analytical Parameter Filter Reporting Units 15A NCAC 02L Standard SWSL Analytical Results Methane Nitrate (as N) Nitrate + Nitrite Nitrate P:\Duke Energy Progress.1026\07.ROXBORO PLANT\17.April 2016 Landfill Solid Waste GW Compliance and Monitoring\Table 1 GMW8 vs MW21BRL Analytical Results Comparison Table page 4 of 5 TABLE 1 ROXBORO ANALYTICAL GROUNDWATER COMPARISON - GMW-8 AND MW-21BRL ROXBORO STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, SEMORA, NC Strontium Thallium Thallium Vanadium Vanadium Zinc Zinc TOT DIS TOT DIS TOT DIS TOT ug/l mg/l mg/l ug/l ug/l mg/l mg/l mg/l mg/l ug/l ug/l ug/l ug/l NE 250 NE NE 0.2*500 NE NE NE NE 0.3*NE 1000 NE 250 NE NE 5.5 NE NE NE NE NE NE NE 10 Sample ID Sample Collection Date GMW-08 12/19/2002 NA 231 NA NA NA 995 2.59 0.032 NA NA NA NA 25 GMW-08 05/29/2003 NA 329 NA NA NA 1220 2.44 0.035 NA NA NA NA 6 GMW-08 11/12/2003 NA 586 NA NA NA 1300 3.17 0.025 NA NA NA NA 7 GMW-08 05/25/2004 NA 625 NA NA NA 1360 3.03 0.062 NA NA NA NA 6 GMW-08 11/17/2004 NA 529 NA NA NA 1570 3.06 0.0716 NA NA NA NA 6 GMW-08 05/18/2005 NA 430 NA NA NA 1350 3.47 0.0687 NA NA NA NA 22 GMW-08 11/16/2005 NA 359 NA NA NA 1010 3.74 0.0821 NA NA NA NA 5GMW-08 05/22/2006 NA 400 NA NA NA 1150 3.57 <1 NA NA NA NA 150 GMW-08 11/15/2006 NA 394 NA NA NA 975 3.81 <1 NA NA NA NA <10 GMW-08 05/23/2007 NA 375 NA NA NA 1220 3.83 <1 NA NA NA NA 116GMW-08 11/06/2007 NA 420 NA NA NA 1180 3.58 <1 NA NA NA NA 304 GMW-08 05/22/2008 NA 390 NA NA NA 1200 5.4 0.06 NA NA NA NA 3 GMW-08 11/19/2008 NA 380 NA NA NA 1200 4.8 0.146 NA NA NA NA <3.8GMW-08 05/07/2009 NA 410 NA NA 6.8 1300 4 0.201 NA NA NA NA 5.6 GMW-08 11/10/2009 NA 390 NA NA <4.8 1300 4.4 0.194 NA NA NA NA 7 GMW-08 05/24/2010 NA 472 NA NA <3 1400 13.1 <0.1 NA NA NA NA 7.8 GMW-08 11/17/2010 NA 499 NA NA <10 1330 11.9 <0.1 NA NA NA NA 9.6 GMW-08 04/19/2011 NA 348 NA NA <0.1 1210 15.6 0.07 J NA NA NA NA 49.3 GMW-08 DUP 04/19/2011 NA 346 NA NA <0.1 1230 13.3 0.1 J NA NA NA NA 55.4 GMW-08 11/01/2011 NA 387 NA NA <0.1 1190 14.5 <0.1 NA NA NA NA <10 GMW-08 04/03/2012 NA 279 NA NA 0.099 JB 1160 6.5 0.02 JB NA NA NA NA 11.8 B GMW-08 11/08/2012 NA 316 NA NA <0.1 1120 13.8 <0.1 NA NA NA NA 13.1 B GMW-08 04/09/2013 NA 340 NA NA <0.2 1100 3.2 0.14 NA NA NA NA 29 B GMW-08 11/12/2013 NA 460 NA NA <0.2 1300 3 0.143 NA NA NA NA 24 GMW-08 04/03/2014 NA 560 NA NA <0.2 1400 3 <0.1 NA NA NA NA 30 B GMW-08 11/10/2014 NA 670 NA NA <0.2 1700 2.5 0.23 NA NA NA NA 64 GMW-08 04/21/2015 NA 780 NA NA <0.2 2100 NA NA NA NA NA NA 31 GMW-08 09/15/2015 1390 770 <1 <0.2 <0.2 2000 2.7 NA <5 1.62 1.84 108 102 GMW-08 11/05/2015 NA 823 NA NA <0.133 2090 NA NA NA NA NA NA 8.52GMW-08 04/06/2016 NA 768 NA NA 0.144 j 2050 NA NA NA NA NA NA 7.97 GMW-08 07/12/2016 NA 712 <0.1 <0.2 <0.2 1840 2.8 0.794 J6 NA 1.92 NA 8 3.88 J MW-21BRL 07/14/2016 NA NA <0.1 <0.2 NA NA 0.969 NA NA 7.4 NA 10 NA MW-21BRL 07/28/2016 321 25 <0.1 <0.2 <0.2 170 0.635 NA 120 2.21 6.35 15 <5 Created by: MCD Checked by: CDE Analytical Results Total Dissolved Solids Total Organic Carbon Sulfate Sulfide Total Suspended Solids Total Organic Halides Analytical Parameter Filter Reporting Units 15A NCAC 02L Standard SWSL P:\Duke Energy Progress.1026\07.ROXBORO PLANT\17.April 2016 Landfill Solid Waste GW Compliance and Monitoring\Table 1 GMW8 vs MW21BRL Analytical Results Comparison Table page 5 of 5