ML19056A410

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Virgil C. Summer Nuclear Station NPDES Permit No. SC0030856 Renewal Application, Source Water Physical Data
ML19056A410
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Site: Summer South Carolina Electric & Gas Company icon.png
Issue date: 01/31/2019
From:
GeoSyntec Consultants, South Carolina Electric & Gas Co
To:
Office of Nuclear Reactor Regulation
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ML19056A440 List:
References
RC-19-0012
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Prepared for SCE&G, VC Summer-Station Highway 215 and Bradham Blvd J enkinsville, South Carolina 29065 SOURCE WATER PHYSICAL DATA V.C. SUMMER NUCLEAR STATION UNIT 1 40 CFR § 122.21(r)(2)

SOUTH-CAROLINA ELECTRIC & GAS COMPANY * -JENKINSVILLE, SOUTH CAROLINA*

Prepared by Geosyntec t>

  • consultants engineers I scientists I innovators 1255 Roberts Boulevard, Suite 200 Kennesaw, Georgia 30144 Project Number GK5356 January 2019 Geosyntec 1> consultants TABLE OF CONTENTS ' 1. INTRODUCTION

................................................................................................

1 2. BACKGROUND AND ENVIRONMENTAL SETTING ...................................

2 2.1 VCSNS Unit I .............................................................................................

2 2.2 Monticello Reservoir

...................................................................................

2 2.3 Geology and Climate

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3 2.4 Source Water Fishery Characteristics

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.' .......................

3 3. OPERATIONAL SETTING AND HYDROLOGY

............................................. 5 . 4. WATERQUALITY

.............................................................................................

7 5. . CWIS AREA OF INFLUENCE

..............

  • .. _ ....... .' ......................................
...........

9 6.

SUMMARY

AND.CONCLUSION

.. : ............... :

................................................

10 7. REFERENCES CITED ......................................................................................

11 GK5356/R2_SWPD_VCSNS_Rev2019_GA160648.docx 01.25.2019 Figure 1 Figure 2 Figure 3 Geosyntec t> consultants TABLE OF CONTENTS (Continued)

LIST OF FIGURES Site Vicinity ofVCSNS Unit 1 Site Layout of the VCSNS Unit 1 Cooling Water Intake Structure and the Fairfield Pumped Storage Facility Bathymetric Depiction of Monticello Reservoir and the CWIS Area of Influence near VCSNS Unit 1, April 2005 APPENDICES

  • **
  • Appendix A Su~ary Water Quality Table for Monticello Reservoi~

GK5356/R2_SWPD_

VCSNS_Rev2019_GA160648.docx ii 01.25.2019 ADCP oc CFR cfs CWA CWIS DO EPA FERC FPSF ft Geosyntec m MGD mg/L MSL NGVD29 NPDES NRC SCDHEC SCDNR SCE&G USFWS VCSNS LIST OF ACRONYMS AND ABBREVIATIONS acoustic Doppler current profiling degrees Celsius Code of Federal Regulations . cubic feet per second Clean Water Act cooling water intake structure dissolved oxygen U.S. Environmental Protection Agency Federal Energy Regulatory Commission Fairfield Pumped Storage Facility feet Geosyntec Consultants, Inc. meters . ' million gallons per day mi1ligrams per liter mean sea level National Geodetic Vertical Datum of 1929 National Pollutant Discharge Elimination System U.S. Nuclear Regulatory Commission Geosyntec 1> consultants South Carolina Department of Health and Environmental Control South Carolina Department of Natural Resources South Carolina Electric and Gas Company U.S. Fish and Wildlife Service Virgil C. Summer Nuclear Station GK5356/R2_SWPD_

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1. INTRODUCTION This report provides source water physical data for South Carolina Electric & Gas Company's (SCE&G's)

Virgil C. Summer Nuclear Station (VCSNS) Unit 1. VCSNS Unit 1 is an existing nuclear-powered generating facility located on Monticello Reservoir in the Broad River basin near Jenkinsville, Fairfield County, South Carolina.

SCE&G operates VCSNS Unit 1 under National Pollutant Discharge Elimination System (NPDES) Permit Number SC0030856.

The information provided in this report supports the facility's compliance with section 316(b) of the Clean Water Act (CWA). The U.S. Environmental Protection Agency (EPA) published 316(b) regulations for cooling water intake structures (CWISs) at existing power generating and manufacturing facilities that became _effective October 14, 2014. The final 316(b) rule requjres the submittal of applicable CWIS information under 40 CPR § 122.21(r) to the South Carolina Department of Health and Environmental Control (SCDHEC), the NPDES permitting agency in South Carolina.

As provided in the NPDES permit application requirements at 40 CPR§ 122.21(r)(2), all existing facilities with CWISs must submit the followin~

source water physical data: (i) A narrative description and scaled drawings showing the physical configuration of all source water bodies used by your facility, including areal dimensions, depths, salinity and temperature regimes, and other documentation that supports your determination of the water body type

  • where each cooling water intake structure is located; (ii) Identification and characterization of the source waterbody

's hydrological and geomorphological features, as well as the methods you used to conduct any physical studies to determine your intake's area of influence wi_thin the water body and the results of such studies; and (iii) Locational maps. The following sections present source water physical data for Monticello Reservoir as the source waterbody used by VCSNS Unit 1. GK5356/R2_SWPD_

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2. BACKGROUND AND ENVIRONMENTAL SETTING 2.1 VCSNS Unit 1 VCSNS Unit 1 is a 972.7-megawatt, nuclear-fueled, base-load generating facility located at the southern end of Monticello Reservoir, a freshwater impoundment (Figure 1 ). Unit 1 operates using a single CWIS located along the shoreline (Figure 2). It has a design intake capacity of approximately 533,122 gallons per minute or 768 million gallons per day (MGD). The actual intake flow of the CWIS is greater than 125 MGD. Although the cooling water system operates in a "once-through" mode, Monticello Reservoir was constructed for the purpose of serving as part of the cooling water system (U.S. Nuclear Regulatory Commission

[NRC], 2004). Thus, the use of Monticello Reservoir as a * *cooling impoundment for VCSNS Unit 1 has been determined by SCDHEC and EPA to be a closed-cycle recirculating system under 40 CFR, Part 125, Subpart J, §125.92(c)(2).

  • The,VCSNS Unit l CWIS consists of an inlet bay about 550 f~et (ft) wide (e~st to west) and 200 ft in length (north to south) (Figure 2). Water depth iri the inlet bay ranges from 30 to 40 ft. The circulating water intake structure is 93-ft wide with six intake bays each approximately 13.;ft wide. Parallel concrete retainer walls-extend out into the intake bay .approximately 30 ft. Steel trash racks with 10-inch spacing are located along the upstream face of the intake structure to prevent large debris from entering the intake bays. They are mounted to the bottom of a skimmer wall that extends from the surface to a depth of 9.5 ft (415.5 ft MSL) at normal high water (425 ft MSL). The skimmer wall excludes floating debris from entering the cooling water system and, combined with the intake retainer walls, optimizes withdrawal of the coolest water from the water column. Vertical traveling water .screens are located 25 ft behind the trash racks to strain out smaller debris. At normal high water, the CWIS withdraws water from the water column at elevations between 415.5 and 390 ft MSL, or from a depth of 9.5 ft to 35 ft. 2.2 Monticello Reservoir Monticello Reservoir is a 6,500-acre freshwater lake with 51 miles of shoreline.

It is located on a small tributary of the Broad River. The reservoir was built in the Frees Creek valley (completed in 1978) to serve as the upper pool for the Fairfield Pumped Storage Facility (FPSF) and the cooling water source for VCSNS Unit 1 (NRC, 2004). Monticello Reservoir is hydrologically connected to a 300-acre sub-impoundment that is managed for recreational boating and fishing by SCE&G and the South Carolina Department of GK5356/R2_SWPD

_ VCSNS_Rev2019

_ GAI60648.docx 2 01.25.2019 Geosyntec 1> consultants Natural Resources (SCDNR). Monticello Reservoir has a total storage capacity of approximately 400,000 acre-feet (Kleinschmidt, 2015) with an average depth of 59 ft, a

  • maximum depth of 125 ft, and a watershed area of 17.4 square miles (NRC, 2011). 2.3 Geology and Climate VCSNS is located in a sparsely populated, mostly rural area approximately 26 miles northwest of Columbia, South Carolina.

The facility is located on 2,246 acres of property, of which approximately 860 acres are inundated by waters of Monticello Reservoir.

The facility lies within the Piedmont physiographic province, a region characterized by gently rolling to hilly terrain with broad stream valleys. The area is underlain by igneous and metamorphic crystalline rocks, including migmatites in transitional areas between metamorphic and igneous bodies. Bedrock within this portion of the Piedmont is metasedimentary and metavolcanic and contains granites, gneisses, and schists. Crystalline bedrock has been deeply weathered into a saprolitic mantle of soil 66 to 131 ft thick at the site.~ The upper soil profile is characterized by a silty and clayey hori;2on (SCE&G, 2002). Normal yearly r.ainfall in the Broad River basin is . about 44.3 inches (US Climate Data.com, 2018). The highest rainfall amounts typically occur in the summer (15.3 inches), followed by winter (10.3 inches), spring (9.3 inches), and fall (9.4 inches). The daily temperature averages 63.8 (17.7°C) annually.

Seasonal daily average temperatures vary from a low of 45.5°F (7.5°C) in winter to a high of 82.5°F (28.1 °C) in summer. 2.4 Source Water Fishery Characteristics Monticello Reservoir supports a warmwater fish community characteristic of a southeastern Piedmont reservoir.

It shares many of the same fish species with Parr Reservoir on the Broad River (Kleinschmidt, 2013), with which it exchanges water daily through FPSF operations.

Fisheries surveys, impingement sampling, and ichthyoplankton surveys conducted between* 1983 and 2016 have documented the occurrence of 42 species of freshwater fish from 10 families in Monticello Reservoir (Dames & Moore, 1985; Christie and Stroud, 1996, 1997; NRC, 2004; Geosyntec Consultants, Inc. [Geosyntec], 2007; Normandeau Associates, Inc., 2007, 2008, 2009a, 2009b; SCDNR, 2013, Normandeau, 2017); The principal sport fishes inhabiting the reservoir include blue catfish, channel catfish, white catfish, largemouth bass, black crappie, white bass, yellow perch, and a variety of sunfishes.

Other recreationally GK5356/R2_SWPD_

VCSNS_Rev2019_GA160648.docx 3 01.25.2019 Geosyntec 1> consultants important species include bluegill and white perch. Important forage fish for predators include gizzard shad, threadfin shad, and juvenile white perch. There are no known occurrences of federally protected threatened or endangered fish or shellfish species, or designated critical habitat for these species, in Monticello Reservoir (SCDNR, 2019; U.S. Fish and Wildlife Service [USFWS], 2016). The endangered mussel Carolina heelsplitter (Lasmigona decorata) historically occurred in Fairfield County but the species no longer occurs in the Broad River system (USFWS, 2012). GK5356/R2_SWPD_

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3. OPERATIONAL SETTING AND HYDROLOGY Monticello Reservoir and Parr Reservoir serve as the upper and lower pools, respectively, ofFPSF (Figure 1). FPSF is part of the Parr Hydroelectric Project operated by SCE&G, which is licensed by the Federal Energy Regulatory Commission (FERC) as Project Number 1894. FPSF generates hydroelectricity by releasing water from Monticello Reservoir into Parr Reservoir using an active storage of 29,000 acre-feet (Kleinschmidt, 2015). During off-peak power demand periods, FPSF turbines reverse and pump water from Parr Reservoir back into Monticello Reservoir.

Created by Parr Dam on the stem Broad River, Parr Reservoir was enlarged in 1977 from 1,853 to 4,398 acres for added pumped storage exchange with Monticello Reservoir and as makeup water for evaporative losses from Monticello Reservoir due to VCSNS Unit 1 operations (SCE&G, 2002). The drainage area of the Broad River upstream of Parr Reservoir is 4,750 square miles. Monthly mean flows of the Broad River downstream of Parr Dam (for water years -1981-2013) range from a low of2,760 cubic feet per second (cfs) in September to a high of 9,023 .cfs in_ March. (Kleinschmidt, 2015). Based on* generation .data for FPSF for the years 2008-2017, average daily discharge from Monticello Reservoir into Parr Reservoir is about 5,829 cfs. The full-pool elevation of Monticello Reservoir is typically managed to 425 ft mean sea level (MSL, NGVD29). Monticello Reservoir experiences daily fluctuations in surface elevation of up to a maximum of 4.5 ft due to pumped storage operations (Kleinschmidt, 2015). Under the FERC license for the Parr Hydroelectric Project, SCE&G operates Monticello Reservoir within an elevation range of 420.5 to 425.0 ft MSL. Operations of FPSF vary by season and system power needs. In the summer, the pumping cycle generally occurs daily between the hours of 11 :00 pm and 8:00 am, and generation occurs between 10:00 am and 11:00 pm. In the winter, pumping generally occurs daily from Parr Reservoir between 11:00 pm and 6:00 am, and generation occurs between 6:00 am and 1 :00 *pm. The level of generation varies from one generator up to the maxim_um output of eight, depending on demand. Maximum output may not be necessary on all days. Pumping is normally done at maximum capacity during off-peak periods. The NRC defines a "cooling pond" as a manmade impoundment that does not impede the flow of a navigable system and is used primarily to remove waste heat from condenser water (NRC, 1996). Under this definition, Monticello Reservoir is categorized as a cooling pond. The NRC (1996) notes that nuclear power plants with cooling ponds GK5356/R2_SWPD_

VCSNS_Rev2019_GA160648.docx 5 01.25.2019 Geosyntec t> consultants represent a unique subset of closed-cycle systems in that they operate similar to through* plants (with large condenser flow rates) but withdraw from relatively small bodies of water created for the plant. EPA's 316(b) regulations for existing facilities at 40 CFR § 125.92(c)(2) define closed-cycle recirculating systems to include a system with impoundments of water of the U.S., where the impoundment was_ created for the purpose of serving as part of the cooling water system as documented in the project purpose statement for any required CWA section 404 permit obtained to construct the impoundment.

EPA and SCDHEC has determined that the use of Monticello Reservoir as a cooling pond for VCSNS Unit 1 constitutes a closed-cycle recirculating system for the purposes of 316(b) compliance.

At the northern end of Monticello Reservoir is a 300-acre impoundment known as the Monticello Sub-impoundment (Figure 1). Although hydraulically connected to the main reservoir by a conduit that passes under South Carolina Highway 99, the water level in this sub-impoundment is minimally influenced by pumped storage operations on Monticello Reservoir proper.

  • The sub-impoundrrient is managed for* fishing* and recreation by,SCE&G and SCDNR. Water is. withdrawn from' Monticello Reservoir for potable use and other non-cooling related uses at VCSNS Unit 1. This water is treated at the facility water treatment plant prior to use. The total rate of water withdrawal from Monticello Reservoir by the water treatment plant is typically about 0.01 m3/s (0.35 cfs). GK5356/R2_SWPD_

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4. WATER QUALITY SCDHEC (2012) classifies Monticello Reservoir as "Freshwaters." Freshwaters are suitable for primary and secondary contact recreation, as a source of drinking water supply after conventional treatment, for fishing and the survival and propagation of a balanced indigenous aquatic community of fauna and flora, and for industrial
  • and agricultural uses (SCDHEC, 2014a). SCE&G collects vertical profile water quality data for Monticello Reservoir, including water temperature, dissolved oxygen (DO), specific conductivity and pH measured at 1-meter (m) intervals from the surface to the bottom. Vertical profiles are measured at four sites: the VCSNS Unit I intake area; the discharge area; the OWS Intake area; and lake toward the northern end of the reservoir (Figures I and 2). As part of the FERC relicensing effort for the Parr Hydroelectric Project, SCE&G compiled 10 years of water quality data_ for the:perfod January 2003 through December 2012 (K.l~inschmidt, 2014). SCDHECalso monitors water quality of the.reservoir at two permanent stations03-327 and.B-328) and,-in some years, at four other stations (RL-04370, RL-04374, RL-08055, and RL-11031) (NRC, 2011; Kleinschmidt, 2014). SCDHEC has collected grab samples on a monthly, bi-rhonthly, or quarterly frequency depending on the site and year, with parameters including temperature, DO, turbidity, pH, biological oxygen demand, alkalinity, nitrogen, phosphorus, fecal coliform, organic carbon, and metals. Monitoring data collected by SCE&G and SCDHEC near the VCSNS Unit 1 intake and in up-lake locations indicate the following water quality trends for Monticello Reservoir (NRC, 2011; Kleinschmidt, 2014):
  • Surface water temperatures range from about 9°C during the winter to 32°C during the summer. Through the spring and mid-summer, temperatures at depths of 15 mare up to 6.7°C cooler than the surface, while at other times of the year, little variation with depth _is observed.

The maximum temperatures observed have not exceeded the numeric criterion for Freshwaters (32.2°C).

  • DO values typically range from 5 to 8 milligrams per liter (mg/L) in the summer months to up to 12 to 15 mg/Lin the winter months. These values fall within the numeric criteria for Freshwaters (daily average of 5.0 mg/L, low of 4.0 mg/L). DO values below 5.0 mg/L have occasionally been measured during the summer in the deepest part of the water column at the up-lake site. GK5356/R2_SWPD_

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  • Specific conductivity typically ranges from 80.0 to 120.0 microSiemens per centimeter at all monitoring sites at all depths in the reservoir.
  • The pH values at the sites near the VCSNS Unit 1 intake and discharge are consi_stently around 7.5, ranging from 6.8 to 8.0. The numeric criterion for Freshwaters is a range of 6.0 to 8.5. The values measured at the up-lake site tend to be more alkaline, ranging up to 8.5 to 8.7 (see below). Throughout the lake, the pH decreases at increasing depths.
  • Analyses of metals in surface-water samples collected quarterly in years from 1999 to 2012 reported results below quantification limits for most metals or detection at low concentrations, indicating support of aquatic life use. Appendix k summarizes minimum, maximum, and mean values for temperature, specific conductivity, DO concentration, and pH measured at 2-m dept,li in Monticello Reservoir during the moni~oring years 2003-2012 (Table 3-11 from Kleinschmidt, 2014). The monitoring data indicate that Monticello Reservoir waters are low in common ions, hardness, *dissolved solids, and conductivity, and do not e~ibit values atypical for Piedmont r~servoirs (NRC; 2011). South Carolina assesses the trophic.condition of lakes by ecoregion against numeric nutrient criteria adopted in 2001 for total phosphorus, total nitrogen, and chlorophyll
a. Monticello Reservoir was assessed at three sampling locations within the lake and found to meet the numeric criteria (SCDHEC, 2014b). The data for monitoring years 2015-2018 are also summarized in Appendix B. Temperature values were expectedly warmest in the discharge area with heat having dissipated in the uplake temperatures.

DO concentrations range from an instantaneous low of 4.8 to over 12 mg/L. pH values had more variability, but reservoir waters continue to be alkaline with average pH of 8.3 in the uplake location.

SCDHEC (2018) currently lists five locations on Monticello Reservoir (stations B-327, RL-04370 RL-04374, RL-13089, and RL-15009) as impaired because of pH values exceeding

8.5. These

stations are located on the east side of the reservoir and up-lake, outside of the area of influence of the VCSNS Unit 1 intake. SCDHEC (2014c) projected a target date of 2019 for developing Total Maximum Daily Loads to address the impairment.

However, due to limited agency resources, the TMDL development for Monticello Reservoir and other lakes will be delayed. (SCDHEC, 2018). GK5356/R2_SWPD_

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5. CWIS AREA OF INFLUENCE A survey to delineate the area of hydraulic influence attributable to the VCSNS Unit 1 CWIS was performed in April 2005 using acoustic Doppler current profiling (ADCP) technology (Geosyntec, 2005). The area of influence survey remains relevant and representative of conditions at the facility today because the cooling water system operations have not changed. Intake flow was at or near 739 MGD throughout the survey period. The survey included three hydraulic data collection events conducted over a 24-hour period to represent daily changes in reservoir elevations that occur as a result of FPSF operations.

Boundaries of the area of influence at the three reservoir elevations were conservatively estimated (Figure

3) based on the detection of any flow vector oriented towards the CWIS regardless of the associated velocity (ichthyoplankton may be susceptible to entrainment even at low velocities directed toward the CWIS). The overall boundary of the area of influence was delineated to encoml?ass the three areas of hydraulic influence measured at the different reservoir elevations.

The survey delineated a* maximum area of influence of 2.92 surface acres; extending from the intake structure

  • approximately 550 ft out into the reservoir with a width*ofabout 250 ft (Figure 3). GK5356/R2_SWPD_

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6.

SUMMARY

AND CONCLUSION Monticello Reservoir is a 6,500-acre freshwater lake with 51 miles of shoreline and a total storage volume of approximately 400,000 acre-feet.

The reservoir is deep, averaging 59 ft depth, and has a relatively small watershed area of 17.4 square miles in the Frees Creek valley, a tributary to the Broad River. At normal full pool, the CWIS withdraws water from a depth of 9.5 to 35 ft. Monticello Reservoir serves as the upper reservoir for the FPSF and exchanges water daily with Parr Reservoir (the lower reservoir).

Monticello Reservoir experiences daily fluctuations in surface elevation up to 4.5 ft due to pumped storage operations.

SCE&G manages the reservoir elevations within an operating band of 420.5 to 425.0 ft MSL. Monticello Reservoir is classified as Freshwaters.

Surface water temperatures range from 9 to 32°C. From spring through mid-summer, temp(;lratures at depths to 15 m and greater .. .. . _ _.are up to 6.7°C cooler than at the surface. DO valu_es va~ seasonally from 5 to 8 mg/L in the summer to up to 12 to. 15 mg/L _in the winter. The reservoir waters are low in specific c*onductivity, common ions, hardness, and dissolved solids, and they meet numeric nutrient criteria for total phosphorus, total nitrogen, and chlorophyll

a. Three sites in the. lake are currently listed by SCDHEC as being impaired because of elevated pH. These sites are located outside of the area of influence of the Unit 1 CWIS. A survey conducted in 2005 using ADCP technology at three different reservoir elevations delineated a maximum area of influence of the VCSNS Unit 1 CWIS of 2.92 surface acres. The area of influence extends from the intake structure approximately 550 ft out into the reservoir with a width of about 250 feet. Monticello Reservoir was constructed for the purpose of serving as part of the cooling water system. Thus, its use as a cooling water impoundment for VCSNS Unit 1 has been determined to constitute a closed-cycle recirculating system for the purposes of CW A
  • section 316(b) compliance.

GK5356/R2_SWPD_

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7. REFERENCES CITED Christie, R.W., and R.M. Stroud. 1996. Fisheries investigations in lakes and streams District IV, July 1, 1995 -June 30, 1996. South Carolina Department of Natural Resources, Annual Progress Report F-63-1-4.

Christie, R.W., and R.M. Stroud. 1997. Fisheries investigations in lakes and streams District IV, July 1, 1996 -June 30, 1997. South Carolina Department of Natural Resources, Annual Progress Report F-63-3-4.

Dames & Moore. 1985. 316(b) demonstration for the Virgil C. Summer Nuclear Station for the South Carolina Department of Health and Environmental Control and the Nuclear Regulatory Commission.

March 1985. Geosyntec Consultants, Inc. (Geosyntec).

2005. Delineation of the Area of Hydraulic Influence Attributable to the Virgil C. Summer Nuclear Station Cooling Water *-Intak~ Structure.

South Carolina ~lectric & Gas Comp~~y, Je~kinsville, South Carolina.

Geosyntec Consuitants, Inc. (Geosyntec).

2007. Preliminary*

report of the fish impingement mortality at the Virgil C. Summer Nuclear Station. Prepared for South Carolina Electric and Gas Company. Columbia, South Carolina.

Kleinschmidt.

2013. Baseline fisheries report, Parr Hydroelectric Project, FERC No. 1894. Prepared for South Carolina.Electric

& Gas Co., Cayce, South Carolina.

November 2013. Kleinschmidt.2014.

Water Quality Report for Parr Fairfield Hydroelectric Project FERC Project No. 1894. Prepared for South Carolina Electric and Gas Company. Columbia, South Carolina.

Kleinschmidt.

2015. Pre-application Document, Parr Hydroelectric Project, FERC Project No. 1894. Prepared for South Carolina Electric and Gas Company, Cayce, South Carolina.

January 2015. Normandeau Associates, Inc. 2007. Monticello and Parr Reservoirs fisheries surveys: final report. Prepared for Tetra Tech NUS, Inc. September 2007. GK5356/R2_SWPD

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_ GA160648.docx 11 01.2s:2019 Geosyntec 1> consultants Normandeau Associates, Inc. 2008. Monticello and Parr Reservoirs fisheries surveys: summer report. Prepared for Tetra Tech NUS, Inc. August 2008. Normandeau Associates, Inc. 2009a, Monticello and Parr Reservoirs fisheries surveys: winter report. Prepared for Tetra Tech NUS, Inc. April 2009. Normandeau Associates, Inc. 2009b. Monticello Reservoir ichthyoplankton studies, September 2008 through August 2009. Normandeau Associates, Inc. 2017. V.C. Summer Nuclear Station Entrainment Study-2016 and revised 2017. Prepared for SCANA by Normandeau Associates, Inc. February 28, 2017 South Carolina Department of Health and Environmental Control (SCDHEC).

2007. Watershed water quality assessment, Broad River basin. Bureau of Water, Columbia, South Carolina.

December 2007. Accessed *at: http://www.scdhec.gov/

HorneAndEnvironment/Docs/bd-006-07.pdf.

~outh Carolina Department of Health and Environmental Control (SCDHEC).

2012. R.61-69, classified waters. Bureau of Water, Columbia, South Carolina.

Effective June 22, 2012. South Carolina Department of Health and Environmental Control (SCDHEC).

2014a. R.61-68, water classifications and standards.

Bureau of Water, Columbia, South Carolina.

Effective June 27, 2014.

2014b. State of South Carolina Integrated Report for 2014, Part II: Section 305(b) Assessment and Reporting.

53 pp. Accessed at: https://www.scdhec.gov/

HomeAndEnvironment/Docs/tmdl_14-305b.pdf.

South Carolina Department of Health and Environmental Control (SCDHEC).

2014c. State of South Carolina Integrated Report for 2014, Part I: Section 303(d) List of Impaired Waters. May 1, 2014. Accessed at: http://www.scdhec.gov/HomeAnd Environment/Docs/tmdl_

14-303d.pdf.

South Carolina Department of Health and Environmental Control (SCDHEC).

2018. State of South Carolina Integrated Report for 2018, Part I: Section 303(d) List of GK5356/R2_SWPD_

VCSNS_Rev2019_GA160648.docx 12 01.25.2019 Geosyntec t> consultants Impaired Waters. Accessed at: https://www.scdhec.gov/sites/default/files/media/

document/PN

_IR_ Part _I_ 2018 .pdf South Carolina Electric and Gas Company (SCE&G). 2002. Virgil C. Summer Nuclear Station License Renewal Application. "Appendix E, Environmental Report." Docket Number 50/395; License Number NPF-12. Jenkinsville, South Carolina.

South Carolina Department of Natural Resources.

2013. Final performance report: robust redhorse restoration and conservation.

South Carolina State Wildlife Grant F05AF00015 (T-9). October 1, 2004 through September 30, 2013. South Carolina Department of Natural Resources.

2019. South Carolina rare, threatened and endangered species inventory, Fairfield County list. Heritage Trust Program. January 22, 2019. Accessed at http://www.dnr.sc.gov/species/.

U.S:*'Fish and Wildlife_

Service (USFWS). 2012. Carolina"heelsplitter (Lasmjgona decorata)~

5-year review: summary and evaluation.

Southeast Region, Asheville Ecological Services Field Office, Asheville, No11h Carolina.

U.S. Fish and Wildlife Service (USFWS). 2016. Endangered species, species by county report, Fairfield County, South Carolina.

Environmental Conservation Online System. http://www.fws.gov/endangered/.

Accessed October 5, 2016. U.S. Nuclear Regulatory Commission (NRC). 1996. Generic Environmental Impact Statement for License Renewal ofNuclear Plants. NUREG-1437, Volumes 1 and 2. Washington, DC. U.S. Nuclear Regulatory Commission (NRC). 2004. Generic Environmental Impact Statement for License Renewal of Nuclear Plants. Supplement 15 Regarding Virgil C. Summer Nuclear Station. Final Report. NUREG-1437.

February 2004. U.S. Nuclear Regulatory Commission (NRC). 2011. Final Environmental Impact Statement for Combined Licenses for Virgil C. Summer Nuclear Station Units 2 and 3. Final Report. NUREG-1939, Volume 1. April 2011. GK5356/R2_SWPD

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_ GA160.648.docx 13 01.25.2019 U.S. Climatedata.com Accessed December 1, carolina/

curacao/ussc0719 GK5356/R2_SWPD_

VCSNS_Rev2019_GA160648.docx 14 Geosyntec 0 consultants 2018 at 01.25.2019 FIGURES I I i LEGEND I

  • Hope Stat.i.on N 10-km (6-m i) radius ofV.C. Summer N Interstates N Major Roads M i nor Roads Coun t y Boundaries

-Lakes and Rive r s Parr Hydro \ 1 -Monticello

.-( . ' _ ~Jenkinsvllle I I I \ ) V . I / s \ ,. 1 _______ -.,.o--,.;.;;;~'J" 2 __ a t Figure c o nsul tants i Jenkinsville, South Carolina 1 -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~_J_~_Af_1a_n1_a

,_G_e_o r~g i_a~J_~~O=ct=ob=e~r 2=0~1 6::__JL_~~~_J 0 ? I I Pa" Reservoir MorJticello Reservoir 1500 0 1500 3000 feet i f----------------------------------.------------------.-----~

~* i i Site Layout of the VCSNS Unit 1 Cooling Water Intake Structure and the Fairfield Pumped Storage Facility Jenkinsville , South Carolina ~'----------------------------

Geo syn.tee 0 Figure consultants 2 Atlanta , Georgia October 2016 0 Bathymetric Depiction of Monticello Reservoir and the CWIS Area of Influence near VCSNS Unit 1, April 2005 Jenkinsville , South Carolina -350 -360 -360 -370 -370 -380 -380 -390 -390 -400 400 -410 410 -420 D 420 -430 CJ High elevation hydrau li c influence boundary C D e clining elevation hydraulic influence boundary CJ Low e l evation hydraulic influence boundary Geo syn tee 0 Figure c on s ult a n ts 3 Atlanta , Georgia O c tober 2016 APPENDIXA O* (\* ,. Summary Water Quality Table for Monticello Reservoir

  • TABLE3-ll

SUMMARY

TABLE FOR MONTICELLO RESERVOIR l INTAKE DISCHARGE UPLAKE ***-**----*[-

-____ Te~p~:~+D~~j~+

pH_ __Te~p i si 5~:~+~~~j~~-

pH___ _Te~p--Pis~::d+D~~j~i-**e!i__

2003. ____ ~MAX ____ t' __ 26.7~~ ___ 126J ___ 13., 8.6Sj J--28.771---~-

12.96! ___ 8.2~ i ... 29.9~----_140,_13.9aj

____ 9~~1 -----*---i;~ ~=--,z 1:::~t~:~-

1:1-=

=-:=. -~::t.~ .. --

=J~ ... -_;;~L ... ~::1L~i-,.

-~~::t= _ ~~~---= 1~{~L:~:_;:_:~

2004 .s: 'L i.a1r*; . '~~~1* ~~:2/:: .:'

'~-29:2~'

,. ;**;~~! ~* ~->*~~-~91

... *: ;~ iei:';.'

-;~.'8~*,v':}

-~~i . ~:-~/: **~:a~, ---* . iMIN .. I .... 6.sor---*6sr-* 4.7i---~-l-

-9.~+ --6:;.--S.13r*-* 6.951-I --~ ----67i--*** 7.53 ... -7.19' .., 8,{.}*::;:.;,,::-d

  • ( ;~:!' ::'1 '~'::=:-.-.ic:'.i**cj~

.. ;~~~,t(**,:f~f

  • .,:~ --***--iMIN*-j=:-*-9.6~---*63!---~~--

6.~-t--10.46

~-----5.281

--~--10.7f

  • -*-60'**-

7.72r--**6.911 E, ,,,;:~> _ 1,9.9~1-<

.-.. 1,1.I_ .. -.. ~:*-~:!;.

,-.~~~l\>*.",*.~~-~f~((.}~-,:*"*;~:,~~~/*.~t-.:

.. f.*,,~o.~~-

5 7 R,, ... ,9.8{.:~J:~

_2006 -~ *:1:" 2s.9sl *-* 101r--'-'~-~ **-*s.1Gr*-

---29?il **-:::wr ¥~i@_:r=-__

30.69(---~101L*

1r16 -* : s.97 ~N ___ --1o~L ___ 73 --4.84 ____ 7.08L -~ ____ n! ____ s.10, ___ --7.12 ~[ ___ 11.61 __ 68 _ 7.4it= 7.37 iA,G ... . .... "-"'!. ..... -~-. . S.6'1__ 7.S>J.~t }9,60 .. _ "L. '-~*L.. ,,,! L..3"-"~-.. t_~.,I . , -~*~ ---~10::r~~f

  • ~,---~:t;l~~**{~**~zq-::1t 1 r~f'-d ~AVG ... *, __ 20HL. -----~*-, -8.0~1. *-;.J.~~!=t.~.03]

___ 192L ... ,. 8.szL.-~-?.:§.gj.

' --,-21.79j ____ . 95_...,, 9.41 ___ 8.03 2008 _ _j~~x ,. __ :, -;;_~,~ -~6~L*~-~1~,, -* * ~.1-/ -~( -'~:~ -.~--~f **~ ~~:~si"**:"-;_;i*

... (: --~*--: _-

.1fs~c *9'.2s **-* --* --1~~--: :t:. -~~:;{[::_}~:-=~~

.. :-~ ~:~: ~J: .3§l~~: . -.1:~ .-:~

t~*-~:~: .iifil:=-.... ~--.: ~:~: 1 t,,:.<;. ::.; t:;*?:.:,::*:1'.;*

.~ ** -. \-., ;.~':, *::*:.:*~~:*-:

.. *.*~*.: .. *: .:1-:. *,.. ... -. ,.,:"'~*.-:., 1*"!:,'.':,, *;;:_:;,::_*,:**:.,>,:*.':j,:

    • ,. ,:;;_:*: i_ :~, ***._ *.:* j' 2009 rMAX .. '"r**** 29.33[ -*-101 1 ** 11.~1""**-*s.~si

=r:. 29.6j ' .... ioir **13.0lr .,_ 7.86] .. *1 ***'3033r

--"*1os[~11~1~~-:,M~

      • -*-*-rMIN

---f--10.18

--*-6cs.64***-***7.31 1-=-t-l0.88--~-s,~ --7.27/*-r-11.57'

6~--6.8~a

-~!:}*r * :::it :*~ d ;;!t(-.. * ... * * ~-* ~=r t: :::. * ~> 2tr -:: . ----tMIN --}--* 8.90t_ --~--5~ --7.531 ... j-----~---

.* *--S.81c, ____ 7.38, __ J--Jfsl ___ }.il ____ 7.9~~-7.66 2011__ J::: **._. ]_.**._.*

.:::::r**-.Ya~}

... 'J:::J*.:

': :*::-~:;";**

1J ~~x~Ji . ::; = *,* ... ** ~=r -~+* ::1 '--~~-----!MIN_ ---___ 9.~]--75! __ }l!IBj 7~---. --9.141 --731_ S.03J ____ 7.0ii--*-*--8.911 ___ 75J_ S.82l_ __ 7.12 l~v*G:**c,.-/

/3:88,.*:, .. _.-9:J"*.:*.

~-s~.1,':.

_ .~6 ... ,._ ,.,_.._ ~-o~I .. * :* _s~I:-** ,-8~~6j_ __ . ~~1: J_ /\441 .. , .@. ,, }J,~l, ?:81: 2012

'.'*-y , ... 2;~f. ----~oo( 11:73!* .. * ... 8.52[' ,,~ _..'Io~(.

,,_;._;8i_*

  • --12.is('*" *tat,-*1 '-> ;o:s1j~~~*-**

~8*--*-12-.7~1*******.:

9.0~1

=+ ~~::~r=*:!~---

~== ~::~:=1==-

~~:~~~--~1=-

~-=~-~:!~1=F -~~::t=~=:f

=.-~:~-----~:~!

MAY2014 3-75 Kleinschmidt 2015-2018 Summary for Monticello Reservoir Discharge Intake Uplake Temp SpCond DO Cone. pH Temp SpCond DO Cone. pH Temp SpCond DO Cone. pH *c uS/cm mg/L SU *c -uS/cm mg/L SU *c uS/cm mg/L SU MAX_ 33.7 105.0 12.7 8.3 29.6 106.0 12.0 7.9 31.3 105.0 12.4 9.3 2015 MIN 10.8 86.0 4.8 6.8 9.0 87.0-4.9 6.6 8.6 86.0 6.8 6.9 AVG 21.5 94.1 9.0 7.2 *20.5 95.0 8.6 7.3 21.7 95.6 9.6 7.8 MAX 29.9 91.1 10.3 8.7 29.3 90.7 10.3 7.7 30.6 90.6 11.1 9.5 2018 MIN 11.2 71.4 5.4 7.2 11.3 71.5 4.9 7.1 12.4 72.3 8.1 7.3 AVG 21.0 78.6 8.4 7.7 20.2 -78.3 7.9 7.4 21.5 80.5 9.9 8.5 Source: SCANA monthly sampling logs.

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