Text

Enclosure 5 - Alert and Notification System Design Report December 2014
	ML14363A376
Person / Time
Site:	Summer
Issue date:	01/15/2014
From:	; South Carolina Electric & Gas Co, US Dept of Homeland Security, Federal Emergency Management Agency
To:	; Office of Nuclear Reactor Regulation
Shared Package
ML14363A422	List: ML14363A373; ML14363A376; RC-14-0191, Enclosure 4 - Kld TR-486, Revision 5, Development of Evacuation Time Estimates Expanded EPZ Boundary EP-100 Appendix 5; RC-14-0191, Enclosure 5 - Alert and Notification System Design Report December 2014; RC-14-0191, LAR-14-05497 Request for NRC Approval of Radiation Emergency Plan Change;
References
	LAR-14-05497, RC-14-0191
	Download: ML14363A376 (108)
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V. C. SUMMER NUCLEAR STATION ALERT AND NOTIFICATION SYSTEM DESIGN REPORT Revision 1 January 15, 2014

V. C. SUMMER NUCLEAR STATION ALERT AND NOTIFICATION SYSTEM DESIGN REPORT SIGNATURE PAGE Prepared By:

VCSNS Emergency Preparedness Specialist/Engineer (Print/Signature) Date Reviewed By:

VCSNS ANS Plant System Engineer (Print/Signature) Date Reviewed By:

VCSNS Emergency Preparedness Supervisor (Print/Signature) Date Approved By:

VCSNS Emergency Preparedness Manager (Print/Signature) Date

V. C. SUMMER NUCLEAR STATION ALERT AND NOTIFICATION SYSTEM DESIGN REPORT REVISION HISTORY 1986 - The original VCSNS ANS Design Report titled Verification and Testing of the Siren Prompt Notification System. This report was approved by FEMA as documented in the letter titled Final Draft Report for the Alert and Notification System for the Virgil C. Summer Nuclear Plant dated August 6, 1986

2009 - Upgrades to the entire ANS were made in order to improve system reliability. FEMA approved this upgrade and is documented in the letter titled VCSNS Siren Replacement Upgrade 2009 dated June 26, 2009

2014 - Revision 1 of the VCSNS ANS Design Report includes the following changes: Information was added as required by FEMA-REP-10, Rev. 1 to describe ANS System overall design, testing, and maintenance details; Updated Acoustical Analysis; Added information for three additional sirens in the ANS; Information was added for expanded plume exposure Emergency Planning Zone (EPZ) due to the construction of Units 2 and 3; and a reversed 911 dialing system has been added to the Back-Up ANS, which currently uses route alerting.

2014 - An update to Revision 1 of the VCSNS ANS Design Report is required due to the following changes: the communication system at VCSNS has been upgraded from an analog to a digital system. The digital system and its supporting components will allow for better and more reliable communication capabilities. In addition, Attachment 1 of the Early Warning Siren System Acoustical Analysis was updated to correct siren addresses and to add sites 33, 69, and 105 that were not included in Revision 1 of this report. Changes were made to the wording in the ANS Operation, Maintenance and Testing Section for clarification.

V. C. SUMMER NUCLEAR STATION ALERT AND NOTIFICATION SYSTEM DESIGN REPORT TABLE OF CONTENTS INTRODUCTION ..................................................................................................................

........................... 1 BACKGROUND OF CHANGES .........................................................................................................

................ 2 GENERAL SYSTEM OVERVIEW AND DESIGN ............................................................................................

..... 3 Off-Site Philosophy and Design ................................................................................................

................. 3 Area of Coverage ..............................................................................................................

......................... 4 Figure 1 Population in VCSNS EPZ ..............................................................................................

........... 5 Communication .................................................................................................................

........................ 6 Figure 2: Configuration of the Commander System ............................................................................. 6 Activation of Sirens ..........................................................................................................

......................... 7 Siren Design ..................................................................................................................

............................ 7 DESCRIPTION OF UPGRADED ALERT & NOTIFICATION SYSTEM ................................................................... 8 SYSTEM ACTIVATION, CONTROL AND MONITORING ................................................................................. 10 Activation and Control ............................................................................................................................ 10 Monitoring .............................................................................................................................................. 10 Activation Points ..................................................................................................................................... 10 Reporting Results .................................................................................................................................... 10 QUALITY ASSURANCE CONFIGURATION MANAGEMENT ........................................................................... 11 FAILURE MODES AND EFFECTS ANALYSIS ................................................................................................... 11 System Maintenance .............................................................................................................................. 11 Failure Modes ......................................................................................................................................... 11 Trending .................................................................................................................................................. 12 ANS OPERATION, MAINTENANCE AND TESTING ........................................................................................ 13 ACOUSTIC CRITERIA OF SIREN SYSTEMS ..................................................................................................... 13 SIREN ACOUSTIC COMPUTER MODEL ANALYSIS ........................................................................................ 13 SIREN ACOUSTICAL TESTING PLAN ............................................................................................................. 13 REFERENCES ................................................................................................................................................ 14 ATTACHMENT 1 - EARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS Addendum 1 - Individual Siren Noise Contour Maps

V. C. SUMMER NUCLEAR STATION ALERT AND NOTIFICATION SYSTEM DESIGN REPORT Revision 1 1 INTRODUCTION South Carolina Electric & Gas (SCE&G) has developed the Alert and Notification System (ANS) Design Report Revision 1 for V.C. Summer Nuclear Station (VCSNS). This report provides details of how VCSNS meets the administrative and physical means to ensure initial alert and notification of the public within VCSNSs plume exposure Emergency Planning Zone (EPZ) as required by 44 CFR Part 350, Planning Standard E, Appendix 3 of NUREG 0654/FEMA-REP-1, and FEMA-REP-10.

VCSNS utilizes 109 fixed electro-mechanical sirens throughout the EPZ as the primary alerting method for local residents and the transient population. VCSNS calls this siren system the Early Warning Siren System (EWSS). VCSNS uses the EWSS along with broadcasted emergency information via local television and radio stations to notify the public on instructions, information, and necessary actions to be taken.

The purpose of this revision is to include changes made to VCSNSs EWSS. One of the changes is the expansion of VCSNSs EPZ. The expanded EPZ is being made at the request of the Lexington County Council, due to the construction of Units 2 and 3 which are located one mile south of Unit 1. The expanded EPZ is the area that extends beyond the original EPZ in Lexington County in Subzone D-2. The map in Figure 1 shows the EPZ.

Another change to the EWSS is the addition of three extra sirens. VCSNS contracted West Shore Services, Inc. in order to confirm coverage by the existing EWSS and to identify the new siren locations for the expanded EPZ. The complete acoustical study is located in the report titled V. C. Summer Nuclear Station Early Warning Siren System Acoustical Analysis located in Attachment 1. Two sirens will be added within the expanded EPZ in locations identified through field test data and computer modeling to provide the required coverage. Due to addition of a new high school near Prosperity, SC (Newberry County) and within Subzone E-2, SCE&G made the decision to add a new siren to this area. Specifics on the location of these sirens as well as all of the sirens in the EWSS can be found in Attachment 1 of this report.

The design report also captured a new more reliable and technologically advanced Back-Up ANS. This system utilizes a high-speed, reverse-911 type of system that is capable of notifying residents in the EPZ by way of available telephones. This system is also capable of sending text messages to residents cell phones, if registered. Back-up Route Alerting will be maintained as an alternate method to notifying the public.

This design report supersedes the original Design Report approved by FEMA in August, 1986.

V. C. SUMMER NUCLEAR STATION ALERT AND NOTIFICATION SYSTEM DESIGN REPORT Revision 1 2 BACKGROUND OF CHANGES The original FEMA approved ANS design report for VCSNS titled Verification and Testing of the Siren Prompt Notification System of V.C. Summer Station was prepared by Acoustic Technology Inc. in February 1982 (Ref. 5). This report contained two parts; Part 1 contained a computer analysis of the installed siren alerting system, Part 2 contained the field testing results of the siren alert system. The original system consisted of 58 Dual-tone Penatrator-10 rotating models, 19 Single-tone Screamer stationary models, and 23 stationary Dual-tone Banshee models, and three Federal Signal Thunderbolts. There were also two Whelen WS 2000 electronic sirens that had a public address capacity. The rotating sirens were located in the more densely populated areas within the EPZ. The following are the changes made to the EWSS from the original design to the present:

In 2009, a design upgrade to the EWSS was done under ECR 50512. The upgrade to the EWSS included replacing all siren heads, siren power supply, control systems, activation equipment, and associated computers at the plant.

All Banshee, Penetrator, and Screamer sirens were replaced with Federal Signal 2001SRNB rotating sirens. This provided a more reliable and consistent system since the original system consisted of a variety of different siren types and manufacturers. Finding spare parts for the original system was difficult due to obsolescence. All replacement electro-mechanical sirens have identical equipment and are simplistic in design, making troubleshooting and repair easier than the previous system. Additionally, this system is upgradable for years to come.

The power supply for all sirens was replaced with 48VDC battery power with solar charging. This eliminated the dependence on less reliable and noisy AC power. Solar charging also eliminated damage from line surges that was a frequent problem with the previous system.

The control equipment for each siren was replaced with Federal Signals DCFCTB controller providing an enhanced two-way communication. This allowed all of the sirens to send a failure signal for practically any type of failure experienced without the need to be poled by the base station.

The Motorola activation equipment was replaced with Federal Signal SS2000D Controller/Encoder. New siren activation equipment was installed in the Control Room, the Work Control Center, the Work Station in the EP area (located on the second floor, in the northeast corner of the New Nuclear Operation Building), and the Emergency Offsite Facility (EOF).

V. C. SUMMER NUCLEAR STATION ALERT AND NOTIFICATION SYSTEM DESIGN REPORT Revision 1 3 In 2014, three additional sirens will be added to the EWSS. VCSNS contracted West Shore Services, Inc. to conduct an acoustical study to verify siren coverage in the original EPZ and provide optimal siren locations for coverage of the expanded EPZ. These studies were conducted in accordance with 10 CFR 50.47, Emergency Plans, NUREG-0654/FEMA-REP-1-Rev.1, Criteria for Preparation and Evaluation of Radiological Emergency Response Plans and Preparedness in Support of Nuclear Power Plants, and FEMA REP-10, Guide for the Evaluation of Alert and Notification Systems for Nuclear Power Plants. VCSNS assumes the average-day-time ambient noise level for the EPZ to be 50dB since the population density in the EPZ is below 2,000 persons/square mile. This assumption was used in the analysis of the VCSNS siren system design to produce a minimum of 60 dB. two sirens will be added within the expanded EPZ in locations identified through field test data and computer modeling to provide coverage. Due to addition of a new high school near Prosperity, SC (Newberry County) and within Subzone E-2, SCE&G made the decision to add a new siren to this area.

In November 2014, an update to Revision 1 of the ANS Design Report is required due to the following changes:

a. Changes to the Communication Section were made due to an upgrade in the radio communication system from the VCS trunked system to a Digital Radio system. This is due to obsolescence issues of the existing controllers.

b. In the ANS Operation, Maintenance, and Testing section, wording was changed to describe the requirement of conducting a quiet test or a growl test following maintenance of the EWSS to verify the siren is operational. Also in this section, wording was added that states if a growl test falls on the same date as the complete cycle test, the complete cycle test can be performed in lieu of the growl test.

c. In Attachment 1 of the Early Warning Siren System Acoustical Analysis, corrected siren addresses and added sites 33, 69, and 105 that were not included in the table in Revision 1 of this report. GENERAL SYSTEM OVERVIEW AND DESIGN Off-Site Philosophy and Design The primary EWSS consists of 109 fixed sirens located throughout the EPZ. These sirens are intended to promptly alert the residents and transient population in the EPZ so they will know to turn to a broadcast station or a communication media to receive information and instruction in the event of a major emergency at VCSNS. The EWSS is designed to meet the requirements of NUREG 0654/FEMA REP-1 and FEMA REP-10, "Guide for the Evaluation of Alert and Notification Systems for Nuclear Power Plants." This was achieved through a comprehensive engineering study that took into consideration population density and geographical features in the EPZ.

V. C. SUMMER NUCLEAR STATION ALERT AND NOTIFICATION SYSTEM DESIGN REPORT Revision 1 4 The public residing in the EPZ is provided information on what actions to take in the event they hear the sirens. VCSNS provides this information every year in the form of a calendar that is mailed to all of the residents and businesses in the EPZ and students attending schools within the EPZ. This publication also identifies the local radio and television stations that the public should tune in for information related to the emergency. Transient populations in the EPZ can get this information regarding local radio and television stations from signs posted at recreational areas and local businesses. Area of Coverage VCSNS is located in Fairfield County, South Carolina which is approximately 25 miles North West of Columbia. Currently, there is one unit (Unit 1) that is active and two units (Unit 2 and Unit 3) under construction. Unit 1 was commissioned in 1984 and is located on the southern shore of Lake Monticello. Units 2 and 3 are located one mile south of Unit 1. The general landscape of the area surrounding VCSNS and in the EPZ consists of a combination of rural farmland and forests. The forests consist mainly of coniferous trees (pine trees) and deciduous trees.

V. C. SUMMER NUCLEAR STATION ALERT AND NOTIFICATION SYSTEM DESIGN REPORT Revision 1 5 The EPZ for Units 1, 2, and 3 of VCSNS is defined as an approximate 10 mile radius from the center point of Unit 1 and expanded into Lexington County from the center point of Unit 3. Parts of four Counties contribute to the entire EPZ; Lexington, Newberry, Fairfield, and Richland. Two sirens will be added to Subzone D-2 to provide coverage for the expanded area.

The population density within the EPZ is less than 2,000 per square mile according to the 2010 Census. Figure 1 shows the total population in the EPZ according to the Evacuation Time Estimate study that was performed by KLD Engineering, P.C. in April, 2012.

Figure 1 Population in VCSNS EPZ

V. C. SUMMER NUCLEAR STATION ALERT AND NOTIFICATION SYSTEM DESIGN REPORT Revision 1 6 Communication The siren radio system consist of a Digital Motorola Mototrbo IP Site Connect System that allows a means of communications between facility control computer and field sirens. The system utilizes both base stations and remote units in conjunction with associated cabling, repeaters, and antennas to provide optimum coverage for two-way continuous transmission. Two transmitter locations are used for siren repeaters, the NND tower and the SCE&G Little Mountain tower. Little Mountain can also be accessed from the Siren Controller locations in the event of an NND repeater failure. Both the controller and siren radios contain both the NND and Little Mountain repeaters in them and they have the ability to select the one with the strongest signal to use and will roam to the other if a failure occurs to the one currently selected.

The communication portion of the EWSS uses the Federal Commander Digital Telemetry System (Commander) using SFCD Software. The Commander was developed by Federal Signal Corporation using reliable digital modem technology developed specifically for wireless communications. The performance of this system has proven to be reliable and secure for the EWSS.

The Commander System is comprised of the Central Computer Unit (CCU), the Siren Controller/Radio Modem Terminal Unit (SS2000), and the Remote Terminal Unit or Siren Controller at Remote Site (RTU). Figure 2 shows the basic configuration of the Commander system used at VCSNS.

Figure 2: Configuration of the Commander System

V. C. SUMMER NUCLEAR STATION ALERT AND NOTIFICATION SYSTEM DESIGN REPORT Revision 1 7 The CCU provides the interface between the user and the siren system. It is used to control sirens, and to store all incoming alarm messages and status messages for later retrieval and analysis. Also the CCU can be used to initiate communications with the RTU(s) to obtain status data and to program sirens remotely. The CCU provides the following:

as a control console to activate the RTUs as a data storage site to collect status and alarm data from all RTUs in the EWSS to provide real time alerting that an alarm has been triggered at an RTU, that an RTU has failed to respond to a command, or that an RTU's main power has failed as a programming console to configure radio communications parameters and remotely program RTUs For permanent records, the CCU data can be printed out on any printer which can reproduce the entire ASCII character set as well as dot addressable graphics. This is used to maintain documentation for PMs and maintenance testing results.

The SS2000D serves as the interface between the CCU computer and the radio transceiver. It also functions as a stand alone terminal unit with activation and status reporting capability in case of a PC failure.

The RTU is a single board microprocessor based monitoring and control unit. It has the capacity to store siren activation functions uploaded from the CCU or SS2000D. It also collects siren status and diagnostic information for report back to the CCU. Each RTU communicates status and alarm data to one or more CCUs or other RTUs over a radio link.

Activation of Sirens Activation of the sirens in the EWSS is done by qualified VCSNS personnel. The EWSS sirens can be activated from four control stations; the Control Room, the Work Control Center, the Work Station in the EP area (located on the second floor, in the northeast corner of the Nuclear Operations Building), and the Emergency Offsite Facility (EOF). At each location, the sirens can be activated using the Siren System computer terminals or the SS2000 bases.

Siren Design VCSNS uses Federal Signal model 2001 series rotating, electro-mechanical sirens. These sirens receive power from 48VDC powered with solar panel charging. This has eliminated the need for the sirens to be dependent on line power and also eliminated the issue of electrical surges from the power lines which have caused damage to sirens in the past.

All sirens located within the EPZ are model 2001-SRNB, factory rated at 128 dBc at 100 feet, with the exception of Site 5 which is a model 2001-130, rated at 130 dBc at 100 feet. The 2001-SRNB siren is a single tone siren capable of sounding for a minimum of 15 minutes. It uses the 2001DCB Control Unit/Battery Box with fully charged, standard, deep-cycle, marine batteries.

V. C. SUMMER NUCLEAR STATION ALERT AND NOTIFICATION SYSTEM DESIGN REPORT Revision 1 8 The control equipment on each siren uses Federal Signals DCFTB controller providing for reliable two-way communication. Each siren utilizes a grounding rod for surge protection. The grounding resistance is verified by VCSNS Electrical Maintenance personnel during the performance of annual siren preventative maintenance activities.

DESCRIPTION OF UPGRADED ALERT & NOTIFICATION SYSTEM In the Spring of 2012, West Shore Services, Inc. and VCSNS conducted extensive acoustical sound level testing throughout the entire EPZ, including the expanded EPZ. During this study, empirical sound level data for both A and C scales were collected at predetermined locations. Most of these testing locations were centrally located by a group of sirens. The majority of these locations were identified by West Shore as representing areas that were predicted by computer based mathematical modeling as having weak sound levels therefore would be the most limiting.

Sound testing was also performed in the expanded EPZ as described above to provide VCSNS with the optimal locations and number of sirens that should be added in this area. These locations were verified with mathematical modeling. It was concluded that two additional sirens needed to be added. The exact locations of these sirens as well as all of the siren locations are located in the report titled V. C. Summer Nuclear Station Early Warning Siren System Acoustical Analysis located in Attachment 1.

With one additional siren installed in subzone E-2 and two additional sirens installed in the expanded EPZ in Subzone D-2, computer based mathematical models and in-field acoustical data demonstrated that the EWSS for VCSNS is in compliance with all Federal Regulatory requirements of 10 CFR50.47, Emergency Plans, NUREG-0654 FEMA-REP-1-Rev.1, Criteria for Preparation and Evaluation of Radiological Emergency Response Plans and Preparedness in Support of Nuclear Power Plants and FEMA REP-10, Guide for the Evaluation of Alert and Notification Systems for Nuclear Power Plants.

Another change to the ANS is the addition of an upgraded Back-Up ANS which utilizes a high speed telephone notification system. This upgrade is a more robust and efficient system that uses technology which is currently used by other business groups within SCE&G and by local and state agencies in the area. This system will notify residents within the EPZ quickly utilizing telephones, in the event that either part or a ll of the EWSS is deemed inoperable. Back-up Route Alerting will be maintained as an alternate methodology for notification of the public.

Beginning in November, 2014, the siren radio system was converted from an analog to a digital system. The VCS Sirens previously operated on a Motorola Smartnet stand alone analog trunked system, located in the Control Building, with the primary antenna on the Reactor Building. The sirens shared the trunked system with Operations, Security, and other groups that support the plant operation.

V. C. SUMMER NUCLEAR STATION ALERT AND NOTIFICATION SYSTEM DESIGN REPORT Revision 1 9 A Motorola Mototrbo IP Site Connect System has been selected as the replacement siren radio system. Two transmitter locations will be used for siren repeaters, the NND tower and the SCE&G Little Mountain tower. Field test measurements from the new siren locations (Sirens 9, 80, 108, and 109) have verified two-way coverage off of the Little Mountain tower as a source of reliable communications. Little Mountain can also be accessed from the Siren Controller locations in the event of an NND repeater failure. Both the controller and siren radios contain both the NND and Little Mountain repeaters in them and they will select the one with the strongest signal to use and will roam to the other if a failure occurs to the one currently selected.

V. C. SUMMER NUCLEAR STATION ALERT AND NOTIFICATION SYSTEM DESIGN REPORT Revision 1 10 SYSTEM ACTIVATION, CON TROL AND MONITORING Activation and Control The sirens in the EWSS are initiated by VCSNS personnel upon direction by state or local authorities as specified in existing agreements concerning activation of the system. The siren system is designed in such a fashion that it can be operationally segregated by county boundary within the 10-mile emergency zone radius. The EWSS signal will be a three-minute steady signal. Upon determination of the need for public notification, the ANS can be activated within 15 minutes. Upon failure of part or all of the system, the State of SC will direct notification methods in accordance with their plan.

Monitoring The EWSS status is monitored continuously by plant personnel. Monitoring points are in the Shift Supervisors office, the Emergency Preparedness (EP) work area, the Control Building/Work Control Center, and the Emergency Operations Facility with displays of the real time status of all of the sirens in the EPZ. The Emergency Plan Implementing Procedure for Activation of the Early Warning Siren System requires the Control Room to notify the Duty EP personnel when siren system operability falls below 95% (6 or more siren site dots displaying any color other than green). Routine notifications are made to EP personnel when any siren is in a trouble or fail condition.

Activation Points After receiving direction by state or local authorities to activate, the EWSS is activated using the control console in the Control Room. If the siren control console in the Control Room is inoperable, the sirens can be activated using a analog to radio encoder, Federal Signal SS2000D, or other Siren System Computer Terminals. Activation points are in the Control Room, the Emergency Preparedness (EP) work area, the Control Building/Work Control Center, and the Emergency Operations Facility.

Reporting Results Results for EWSS siren testing are maintained in the stations plant records repository (Filenet). Results are also typically attached to the Preventative Maintenance Task sheet If a siren fails any of the scheduled PMs, the condition is entered in the stations Corrective Action Program. The SCE&G Radio Group is notified and dispatched to perform an initial assessment and to troubleshoot the problem. If the siren(s) are determined to be inoperable, the affected County Warning Points and the Control Room are notified. The Emergency Plan Administrative Procedures for Maintenance of the Early Warning Siren System provides a specific definition of individual siren operability.

V. C. SUMMER NUCLEAR STATION ALERT AND NOTIFICATION SYSTEM DESIGN REPORT Revision 1 11 The EWSS is declared inoperable when less than 75% of the sirens are operable, or when there is a total loss of the capability to activate the EWSS. This does not apply to planned maintenance or repair activities. The Shift Supervisor declares the system inoperable once this criterion is met and refers to NL-122, Regulatory Notification and Reporting, for reportability requirements. QUALITY ASSURANCE CONFIGURATION MANAGEMENT The Emergency Plan is described in the Final Safety Analysis Report (FSAR) for VCSNS Unit 1 and for Units 2 and 3. Since the ANS supports the Emergency Plan for all three units, the sirens in the EWSS are considered plant equipment. As such, design changes to the EWSS are controlled under current governing procedures for design control, interface, and implementation.

Sirens in the EWSS are maintained using maintenance procedures and Emergency Plan implementing and administrative procedures. These procedures were developed and are controlled under a 10 CFR 50 Appendix B Quality Assurance Program. More detailed VCSNS plant procedures are available upon request. Documentation for maintenance activities or changes done on the EWSS is maintained in the stations plant records repository. FAILURE MODES AND EFFECTS ANALYSIS

System Maintenance The EWSS is included in the stations Preventative Maintenance Program. Planned preventative maintenance is performed annually by VCS Electrical Maintena nce and also annually by the SCANA Radio Group. Scheduled preventative maintenance is performed to increase equipment reliability, to monitor and trend the equipment condition, and to find any failed conditions in equipment. The Plant Support Engineering (PSE) system owner monitors the health of the system as well as providing technical guidance and oversight as required.

Failure Modes When a siren is deemed inoperable due to any failure mode, the affected county or counties and the Control Room are notified and that the Back-Up ANS is utilized for the affected area. The failure modes listed below were obtained from a review of the stations corrective program for the last five years. Below are the most common failure mechanisms that have been identified in the EWSS.

Battery Failure - Since the EWSS relies completely on DC power, the sirens are vulnerable to this failure mode. Battery failure has been mainly due to the age of the batteries. Although there are PMs in place to replace all of the batteries for each siren on a three year cycle (recommended by the vendor), there have been times when they need replacing prior to the end of this three year interval.

V. C. SUMMER NUCLEAR STATION ALERT AND NOTIFICATION SYSTEM DESIGN REPORT Revision 1 12 Since the batteries are charged by solar panels, the system must rely on the availability of the sun. Low battery alarms/battery failures have occurred when there is too much shade from nearby trees, when there are several days in a row of heavy clouds, or when the sun is low in the sky as in winter months.

An additional cause for battery failure has been due to the failure of the battery charging sensor. Because of this, charging sensors are now replaced during PMs performed by VCSNS Electrical Maintenance.

Communications Failure - Mechanisms causing communication failures have been poor signal strength due to battery failure, poor cable connections, failure of the radio, or failure of one or both of the circuit boards (all due to aging equipment).

Chopper Failure - Failure mechanisms include a Chopper motor being seized as a result of debris and the presence of outside natural infestations or gasket seizure. The chopper is a device that produces sound by forcing out alternating compressed and rarefied air.

Circuit Board Failure - Each siren operates using silicone circuit boards which may fail due to a power surge or a bad/corrupted card.

Trending Several processes are used to trend and address failures to the EWSS. The primary method is the use of the stations Corrective Action Program (CAP). When a siren is deemed inoperable or if a siren fails a scheduled PM, this is entered into the CAP program for evaluation or for tracking and tending purposes. This also allows for common causes to be identified.

EP monitors the siren reliability by tracking performance indicators as described in the Emergency Preparedness Performance Indicator Procedure. This procedure describes the data collection and calculations for the Emergency Preparedness Cornerstone Performance Indicators (PI) in the Nuclear Regulatory Commissions (NRC) Reactor Oversight Process (ROP). The Alert and Notification System Reliability is one of the indicators monitored by this procedure. An additional Performance Indicator monitored by this procedure is ANS Performance. Downward trends of a NRC Performance Indicator is documented in accordance with the stations Corrective Action Program.

V. C. SUMMER NUCLEAR STATION ALERT AND NOTIFICATION SYSTEM DESIGN REPORT Revision 1 13 ANS OPERATION, MAINTENANCE AND TESTING Routine testing and post maintenance testing of the EWSS is performed from the EP siren computer control station by EP personnel using approved VCSNS procedures. The sirens are tested at the following frequency, as a minimum:

A silent test of the EWSS shall be performed at least biweekly A growl test of the EWSS shall be performed at least quarterly. A complete cycle test of the EWSS (full system activation) shall be performed at least annually If a growl test falls on the same date as the complete cycle test, the complete cycle test can be performed in lieu of the growl test. Since the complete cycle test activates the sirens for a longer period of time, it will be credited for the growl test. Following preventative or corrective maintenance on the EWSS, a quiet test or a growl test shall be conducted as required to verify the siren is operational. A quiet test activates the sirens for approximately fifteen seconds reaching full volume for approximately five seconds.

Documentation of all testing and maintenance activities performed on the EWSS is maintained as a record in accordance with the stations Preventative Maintenance Program or in accordance with the stations Corrective Action Program. ACOUSTIC CRITERIA OF SIREN SYSTEMS This has been described in the report titled V. C. Summer Nuclear Station Early Warning Siren System Acoustical Analysis located in Attachment 1. SIREN ACOUSTIC COMPUTER MODEL ANALYSIS This has been described in the report titled V. C. Summer Nuclear Station Early Warning Siren System Acoustical Analysis located in Attachment 1. SIREN ACOUSTICAL TESTING PLAN This has been described in the report titled V. C. Summer Nuclear Station Early Warning Siren System Acoustical Analysis located in Attachment 1.

V. C. SUMMER NUCLEAR STATION ALERT AND NOTIFICATION SYSTEM DESIGN REPORT Revision 1 14 REFERENCES

1. FEMA-REP-10, Rev.1, Guide for the Evaluation of Alert and Notification Systems, September, 2011.

2. NUREG-0654/FEMA-REP-1, Rev. 1, Criteria for Preparation and Evaluation of Radiological Emergency Response Plans and Preparedness in Support of Nuclear Power Plants, November,1980.

3. KLD Engineering, P.C. Development of Evacuation Time Estimates Expanded EPZ Boundary, April, 2012.

4. ECR 50512, Alert and Notification System Replacement, November, 2007.

5. Acoustic Technologies, Inc., Verification and Testing of the Siren Prompt Notification System of V.C. Summer Station, February, 1982.

6. ISO 9613-2, Acoustics - Attenuation of Sound During Propagation Outdoors, Part 2 General Method of Calculation, 1996.

7. Federal Signal SFCDWARE

V. C. Summer Nuclear StationEarly Warning Siren System Acoustical AnalysisDecember 17, 2013Work Performed By:West Shore Services,Inc.6620 Lake Michigan Dr.Allendale, MI 49401616-895-4347 Ext. 112jdupilka@westshorefire.com V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS iTABLE OF CONTENTSLIST OF MAPS...................................................................................................................

..iii LIST OF ATTACHMENTS...................................................................................................iv ADDENDUMS......................................................................................................................

v ACRONYMS and MEASUREMENTS.................................................................................vi 1.0 EXECUTIVE

SUMMARY

................................................................................................1 2.0 PROJECT OVERVIEW..................................................................................................2 2.1 EWSSLocation Description...........................................................................................2 2.2 Current Warning Site Locations......................................................................................3 3.0 SOUND REQUIREMENTS BASED ON POPULATION.................................................4 3.1 Siren System Sound Level Compliance Discussion.......................................................4 4.0 PHYSICS OF SOUND....................................................................................................5 4.1 Atmospheric Conditions Effect on Siren Range..............................................................5 4.2 Ground Effects on Sound Absorption and Attenuation...................................................6 4.3 Topographical and Barrier Effects..................................................................................7 4.4 Wind Shadow Effect in the Upwind Direction.................................................................7 5.0 EXISTING SIREN TYPES AND OUTPUT......................................................................9 6.0 TEST METHODOLOGY...............................................................................................10 6.1 Sound Monitoring.........................................................................................................10 6.2 Sound Monitoring Objectives........................................................................................11 6.3 Sound Measuring Equipment.......................................................................................12 6.4 Weather Monitoring Equipment....................................................................................12 7.0 BASELINE AND ACOUSTIC TESTING.......................................................................13 7.1 Existing Siren Baseline Testing....................................................................................13 7.2 Baseline Test Results...................................................................................................14 7.2.1 Location 1 -Siren 5 Baseline Test.............................................................................15 7.2.2 Location 2 -Siren 40 Baseline Test...........................................................................16 7.3 Acoustic Group Testing................................................................................................17 7.4 Acoustic Group Testing Results...................................................................................18

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS iiLocation 3: Group 1 Test....................................................................................................18 Location 4: Group 2 Test....................................................................................................19 Location 5: Group 3 Test....................................................................................................20 Location 6: Group 4 Test....................................................................................................21 Location 7: Group 5 Test....................................................................................................22 Location 8: Group 6 Test....................................................................................................23 Location 9: Group 7 Test....................................................................................................24 Location 10: Group 8 Test..................................................................................................25 Location 11: Group 9 Test..................................................................................................26 Location 12: Group 10 Test................................................................................................27 Location 13: Group 11 Test................................................................................................28 Location 14: Group 12 Test................................................................................................29 Location 15: Group 13 Test................................................................................................30 Location 16: Group 14 Test................................................................................................31 8.0 SIREN ACOUSTIC COMPUTER MODEL ANALYSIS.................................................32 8.1 Description of Calculations Used..................................................................................32 8.2 Assumptions Used.......................................................................................................33 8.3 Coverage Maps............................................................................................................34 9.0

SUMMARY

/CONCLUSIONS........................................................................................35

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS iiiLIST OF MAPSMAP (1)VCSNS 10 Mile Emergency Planning Zone.

MAP (2)Noise Contour Map displays total area coverage and existing sirens for the current and expanded EPZ. Also identifies 14 test locations. MAP (3)Noise Contour Map displays total area coverage and existing sirens for the current and expanded EPZ. Also identifies 14 test locations and includes proposed sirens 9, 108, and 109.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS ivLIST OF ATTACHMENTSAttachment (1)Current summary of existingsites (1-107, site 9 unused)and threenewsites(9, 108, 109). IncludesGPS coordinates,location description,and county.Attachment (2)Chartthatidentifies the 14field test locations throughout theexisting and expandedEPZ.Attachment (3)Weather History for Columbia, South Carolina from January 1,2012 to December 31, 2012.Attachment (4)Average Summertime Environmental Parameters.Attachment (5)Baseline Report for Siren 5.Attachment (6)Baseline Report for Siren 40.

Attachment (7)V.C. Summer EWSS Group Testing Results.

Attachment (8)V.C. Summer EWSS Site Test Data Sheets.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS vADDENDUMSAddendum (1)Displays Individual Noise Contour Maps CONCAWE P/TA Sites 1-109.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS viACRONYMS and MEASUREMENTSCONCAWEConservation of Clean Air and Water in EuropeEPZPlume Exposure Emergency Planning Zone EWSS Early Warning Siren SystemFEMAFederal Emergency Management AgencyGPSGlobal Positioning System inHginch mercury [0 °C]LEQEquivalent Continuous Sound LevelsNOAANWA National Oceanic and Atmospheric Administration /NationalWeather AssociationNUREGNuclear RegulationsSLMSound Level MeterSPLSiren Sound Pressure USGSUnited States Geological ServiceVCSNSV. C. Summer Nuclear StationWSSWest Shore Services V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS 11.0 EXECUTIVE

SUMMARY

The scope of this project includesan acoustical analysis of the plume exposure Emergency Planning Zone (EPZ) for V.C. SummerNuclear Station (VCSNS). This study includes the original EPZ for Unit 1 as well as the expanded EPZ for Units 2 and 3(Map 1).The expanded EPZ was necessary toaccount for construction of Units 2 and 3. These new units created a shift in the geographic center of the EPZ, and as a result of this shift, the EPZ was expanded to incorporate them.The expanded EPZ includes the original EPZ that centers on Unit 1 as well as the new EPZ that centers on Units 2 and 3.The 2010 Census identifies a permanent population in the VCSNS EPZ of approximately 14,000 people and population densities of less than 2,000 persons per square mile. This information was confirmed to establish a minimum threshold of 60 dBc of coverage throughout both the current and expanded EPZs, which meetsthe currently accepted Federal Emergency Management Agency (FEMA)guidelinesin place at the time of this study.

1The only area likely to attract large numbers of temporary public assembly is Lake Monticello, whichwasidentified as the only significant recreational (public assembly) area within the existing or expanded EPZ. Baseline testing ofFederal Signal 2001-SRNBand Federal Signal 2001-130 sirens models, which arethe two types of sirensutilized by the VCSNS facility,were undertaken to assure that accurate performance of the existing system would be introduced into the acoustical model. Acoustical tests were conducted at 14individual locations throughout the EPZ including two areas within the expanded EPZ. Once the baseline testing and field testing were completed,the results were used to verify the coverage predicted by the SoundPLAN acoustic modeling of the existing and expanded EPZs.

1The current FEMA guidelines referenced in this document refer to the currently accepted guidelines and do not take into consideration any changes that have been proposed and not accepted at the time of the acoustic study. The latest version of the FEMA guidelines was out for comment at the time of this publication; comments were still being accepted through October 29, 2013.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSIS 22.0 PROJECT OVERVIEWOn December 12, 2012, representatives from West Shore Services (WSS)met with representatives of the VCSNSfacilityto review and confirm the scope of work for thisproject. During the meeting,information and documentation related to individual site inspections as well as the acoustical study was reviewed; this information was critical to WSS being able to move forward.As a result of the meeting, the following scope of work was identified:Complete a thorough individual site inspection of each of the 106 sites.This review is for plant information only and is unrelated to the acoustical study.Complete baseline testing of the two existing types of sirensthat comprise the Early Warning Siren System (EWSS): Federal Signal 2001-SRNBand Federal Signal 2001-130.Develop test sites throughout the existing EPZ to confirm coverage meets current Nuclear Regulations(NUREG)andFEMA Guidelines. Develop recommendations for additional siren sites if necessary to assume 60 dBccoverage in the existing EPZbased on test results.Review the expanded EPZ for Units 2 and 3 and recommend additional coverage if necessarybased on test results.Utilize WSSsite test data to generate a SoundPLAN software based model that represents the total dB coverage provided within the existing and expanded EPZ areas.Submit a final acoustic report and coverage map identifying and documenting VCSNScompliance with NUREG-0654 and FEMA-REP-1 and FEMA-REP-10coverage guidelines in the existing and expanded EPZs.It was confirmed thatthe balance of the EPZ was to be designed to meet the minimum 60 dBc requirements per the NUREG and FEMA guidelinesbased on 2010 Census data.2.1EWSS Location DescriptionVCSNSis located in Fairfield County, South Carolina, approximately 26 miles northwest of Columbia, South Carolina.The plume exposure pathway EPZ is an area surrounding the VCSNSsite with Unit 1 at the center and a radius of about ten miles.It includes the following counties:Fairfield CountyLexington CountyNewberry CountyRichland CountyThe EPZ isprimarily rural in nature,with occasional residential interfaces throughout. The broad topographical makeup is characterized by heavily forested areas, open fields,light tree growth, and significant differences in elevation.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSIS 32.2 Current Warning Site LocationsPrior to beginning the review of the acoustic coverage for the VCSNSfacility, WSS staff visited each of the 106EWSSsiren locations. Global Positioning System (GPS)coordinates for each location were verifiedtoensurea correct database for the acoustical study (Attachment 1).

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSIS 43.0 SOUND REQUIREMENTS BASED ON POPULATION3.1 Siren System Sound Level Compliance DiscussionThe FEMA-REP-10 guidelines for EWSS acoustic coverage specify a sound pressure level that will generally be greater than 70 dB'C'where population density exceeds 2,000 persons per square mileand 60 dB'C'in other inhabited areas, or the expected siren sound pressure level will generally exceed 10dB above the average measured summer daytime ambient levels in areas with less than 2,000 people per square mile.VCSNShas a population density in the existing and expanded EPZ of less than 2,000 persons per square mile according to the most recent 2010 Census.Based on this population density, the existing and expandedEPZwere reviewed to ensure that VCSNSmeets theminimum requirement of 60 dB for the less than 2,000 persons per square mile population density.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSIS 54.0 PHYSICS OF SOUNDIn order to understand the acoustical analysis of the VCSNSEPZ, the following subsections includebasic information on sound propagation and attenuation.4.1 Atmospheric Conditions Effect on Siren RangeIn a calm daytime atmosphere, temperature decreases with increasing height above the ground and is known as a temperature lapse.The speed of sound through a medium is proportional to its density.The speed of sound through the air has been found to be proportional to the square root of air temperature.Therefore,sound velocity decreases with height above the groundand, as a result, sound waves have a tendency to bend upward under calm conditions with the sun high inthe sky and warming the ground, which is typical for summer daytime conditions.A further result is that an acoustic shadow is formed at the ground level, an area where the sound reaching a listener is greatly reduced because the sound wave is being bentupwards and away from the listener.Under extreme conditions, such acoustic shadows can form very close to the source in the upwind direction.

Acoustic shadow zone formation due to temperature lapse is illustratedin Figure 1.Figure 1-Sound Transmission in Temperature Lapse ConditionsThe opposite effect occurs in a temperature inversion (i.e., in those instances when the temperature decreases the closer one is to the ground).Because of the ground'scapacity to retain heat absorbed during daylight hours, temperature inversions typically occur at night when this heat is being released, and is a contributing factor as to why the same sound source usually sounds louder at night than in the daytime.This effect is illustratedinFigure 2.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSIS 6Figure 2-Sound Transmission in Temperature Inversion Conditions4.2 Ground Effects on Sound Absorption and AttenuationDifferences in attenuation between ground with and without large amounts of trees affect siren frequencies (500 Hz octave band) if the ground is modeled as soft (assuming the 0.25 soft-medium conservative ground factor used for our evaluation).Much of the VCSNSEPZ consists of woodedland, with other parts cleared and used for residential, agricultural,and other purposes.Modeling large areas of forest is consistent with the recommended practice of limiting tree attenuation.In areas of the EPZ where tree coverage is limited to a short distance (<200') of canopy penetration,sound rays can "hop" over the tree belt.An illustration of this phenomenon isshown inFigure 3.Figure 3-Downwind SoundPropagation a nd Vegetation Effects for Short Distances (<200')The assumption of soft ground inherent in the model is consistent with the VCSNSEPZ terrain.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSIS 74.3 Topographical and Barrier EffectsDiverse terrain (i.e., ridge, hills)or a large structure (i.e., building, water tower) willcreate a partial barrier to sound propagation. Barriers can provide a moderate amount of sound reduction within its shadow zone. The attenuation from a barrier is estimated by the SoundPLAN Acoustic Modeling Software. The model determines the effective barrier height above the line-of-sight from the siren (source) to the receiver (human reconnection) location. The other two essential dimensions are the distance from the siren to the barrier and from the barrier to the receiver.Topographical data from United States Geological Service(USGS)maps is used to calculate the sound attenuation due to barrier effects caused by the high elevations generating acoustic shadow zones behind ridges and hills. SoundPLAN computer model uses topographical data thatis obtained throughdirect readings of land elevation from USGS maps covering the siren propagation area.4.4 Wind Shadow Effect in the Upwind Direction While the acoustic model used in this report considers wind speed as a factor in atmospheric stability corrections to predicted average range,which includes upwind, downwind and crosswind directions, it does not consider the additional effect of the vector addition of wind effects and temperature lapse effects directly in the upwind direction. Wind velocity adds or subtracts from sound velocity depending on whether the sound is moving upwind or downwind.In addition, wind velocity typically increases with increasing height, thus further augmenting the refraction of sound away from the ground.The acoustic shadow will form in the upwind direction even closer to the sound source than under calm conditions, with the shadow's proximity to the source increasing with the speed of the wind; on the other hand, a downwind position will decrease or-given strong enough winds-totally eliminate the acoustic shadow.As a rule of thumb, summer daytime wind shadow effect is roughly proportional to the square of the wind speed up to about 10 mph.Thus, in the upwind direction, 10 mph wind speed will result in a further siren range reduction of approximately 30%; 5 mph will result in a siren range reduction of approximately 8%, 2 mph will result in a range reduction of approximately 2%.For normal wind speeds, downwind effects are typically small and are usually not consideredin sound prediction models.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSIS 8Figure 4-Upwind Sound Propagation plus Temperature Lapse Shadow FormationFor sirens that are within the interior portions of the EPZ, there are several adjacent sirens that will sound downwind or crosswind into a given siren upwind sounding direction.Thus, sound from adjacent sirens will either be enhanced or unaffected by the wind, particularly for the VCSNSsiren system, which has a dense siren configuration.The upwind effect is accounted for by placing sirens close enough to the EPZ perimeter and close enough to adjacent sirens that will sound in a cross-wind direction such that the expected range shortening does notreduce the coverage area to inside the EPZ perimeter in any area that is populated.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSIS 95.0 EXISTING SIREN TYPES AND OUTPUT VCSNSuses Federal Signal model 2001 series sirens to meet the alerting needs of the plant.All sirens located within the EPZ aremodel2001-SRNB,factory rated at 128 dB(C)at 100 feet, with the exception of Site5which is a model 2001-130,rated at 130 dB(C)at 100 feet.The Federal Signal 2001-SRNB siren is an electro-mechanical, DC, rotating siren that is capable of producing high intensity warning signals over a large area. A highly efficient design enables the siren to produce a high sound level while making moderate demands on the power source.The 2001-SRNB siren is a single tone siren capable of producing a 128 dB sound level at 100 feet for a minimum of 15 minutes. It uses the 2001DCB Control Unit/Battery Box with fully charged, standard, deep-cycle, marine batteries. Two motors are used to create the siren signals. The first motor rotates the siren assemblywhile the second motorproduces the sound energy. The second motoris attached to a stator with a rotor mounted on the motor shaft concentric to the stator. The rotor and stator each contain one row of ports. As the motor rotates the rotor, air is drawn into the rotor and passes through the rotor and stator ports in pulses. These pulses are produced when the rotor alternately opens and closes the stator ports. The pulses of air produce sound at a frequency, or pitch,that is dependent upon the rotational speed of the motor and the number of ports in the rotor-stator combination.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSIS 106.0 TEST METHODOLOGYCollection locationswere chosen based on existing siren locations and analysis of the typical sound coverage area of the Federal Signal sirens. Each siren interacts with neighboring sirens to create a sound coverage area that includes both the sound energy from the local siren as well asthe sound energy from surrounding sirens. Analysis of the existing siren locations coupled with the geographic data of VCSNScoverage identifiedareas most likely to have low coverage. These potentially low coverage areas were selected as test sites to verify whethertheEPZ was adequately covered by warning sirens.In addition to the potentially low coverage areas, areas identified as most likely to have adequate coverage were also selected as test sites. Including these areas in analysis and testing allowed coverage tobe measured to verify that the acoustic model and study covered the EPZ as expected.6.1Sound MonitoringA digital record of the sound levels was obtained at each of the collection, or acoustical measurement,locations. Before and during the test interval, a data sheet was populated to documentinformation on location, instrumentationused, and any general comments about the test location. The wind speed, wind direction, temperature, humidity, barometric pressure,and weather conditionswere also documented at each site.Weather data was collected at each location utilizing anAcuRite portable weather station/anemometer.Data was collected during the two minute ambient and the two minute test sequences, for a total of four minutes.Two minute ambient Equivalent Continuous Sound Levels(LEQ) and MAX measurements wererecorded on both the 'A'and'C'scale utilizing two separate measuring devices as identified on each acoustic survey form.Maximum slow average Siren Sound Pressure(SPL)measurements and a minimum two minute LEQand MAX measurements were taken during the siren sounding.The maximum levels recorded using slow average SPL are considered most significant when measuring rotating sirens since the sound source is constantly moving.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSIS 116.2 Sound Monitoring Objectives Test locations were selected based on the followingobjectives:Verify the existing EPZ EWSS warning system remains in compliance with NUREG and FEMA guidelines.Evaluate expanding EPZ for coverage compliant with NUREG and FEMA guidelines Verify adequate acoustic coverage based on year 2010 Census data -60dB

'C' minimum sound level. Collect acoustical data to compare and contrast result from SoundPLAN Acoustical Modeling Software.During EWSStest operations,severallocations (Attachment 2) were used to measure the sound pressure levels generated by EWSS. The EWSS sound pressure levels and test sites background ambient sound pressure levels were measured on both the 'C'and'A' weightingnetworks to allow forsimilar comparisons with modeled sound contours presented in the sound analysis documents.'C'weighting and 'A'weighting differ in their sensitivity to different frequency ranges and environmental distortion.Background ambient noise levels were measured at all locations. The background noise level is defined as the noise level in the acoustic environment excluding the noise source of interest.At each location, twobackground noise level measurements were taken simultaneously using two separate Sound Level Meters (SLM) -maximum (peak) background noise was recorded for all locations. One SLM was set to measure the test site's LEQon the 'A' weightednetwork while the other was set to measure the test site's LEQon the 'C' weightednetwork. This was done to obtain the decibel difference between the 'A'and 'C' weightednetworks at each location. Weather observations used were collected at each site using an AcuRite portable weather station/anemometer.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSIS 126.3 Sound Measuring EquipmentSound equipment used to measure on the 'A' weighting network:Soundtek model ST-107SANSI Type 2 Measuring Device -Calibration date (manufacturer 3/03/13): units were field calibrated utilizing a SPER SCIENTIFIC 2 point acoustical calibrator prior to conducting each group test.Sound equipment used to measure on the 'C'weighting network:Bruel & Kjaer model2236ANSI Type 1Measuring Device-Calibration date (independent lab 3/08/13): units were field calibrated utilizing a SPER SCIENTIFIC 2 point acoustical calibrator prior to conducting each group test.Each measurement system consisted of a sound level meter with windscreen and a calibration source. 6.4Weather Monitoring EquipmentWeather conditions were determined utilizing an AcuRiteportable weather station/anemometer. The wind speed, wind direction, temperature, humidity, barometric pressure, and general weather conditions were documented at each location. Data was collected during the two minute ambient and the two minute test sequences, for a total of four minutes.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSIS 137.0 BASELINE AND AC OUSTIC TESTINGBaseline testing was completed to verify field output on the two existing types of sirens used forthe VCSNSEWSS. Once baseline testing was completed, acoustical measurements were taken at 14siren locations throughout the existing and expanded EPZ. Test locations are identified in . 7.1Existing Siren Baseline TestingUpon arrival at VCSNSand after the orientation meeting, the first task was to perform baseline testing of the two types of sirensusedin the EWSS.The first siren baseline test included Siren 5, whichis a Federal Signal 2001-130 (130 dB) unit. This is the only 2001-130 unit in the VCSNSEWSS. This siren was updated due to a motor vehicle accident at the site.The baseline acoustical survey formis included in Attachment 5.The second unit tested was Siren 40, a Federal Signal 2001-SRNB (128 dB) unit which represents the balance of the warning sirens used in the VCSNSEWSS. The baseline report is included in Attachment 6.The results of the baseline testing were introduced into the Acoustic SoundPLAN Model to represent actual field output of the remote siren sites utilized in thesystem.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSIS 147.2 Baseline Test ResultsThe following table compares overall predicted values with actual measured values. The far left column lists each test location, with predicted and measured values listed in the adjacent columns. The far right columnlists the resulting differences, which were obtained by subtracting measured values from predicted values. Table 1 Differences of Predicted and Measured Values by Test Location

2Baseline Test for Federal Model 2001-130.

3Baseline Test for Federal Model 2001-SRNB.Group TestTest LocationPredicted APredicted CMeasured AMeasured CDifference ADifference CBaseline 2170-7570-7568.473.51.6 0Baseline 3270-7570-7552.368.617.31.6 1360-6560-6551.1598.9 1 2465-7065-7054.374.910.7(4.9) high 3560-6560-6545.572.414.5(7.4) high 4665-7065-7050.271.614.8(1.6) high 5765-7065-7053.761.911.33.1 6870-7570-7558.966.111.13.9 7980-8580-8577.583.82.5 0 81070-7570-7566.874.73.2 0 91165-7065-7063.6782.4(8.0) high101265-7065-7058.364.26.70.8111375-8075-8050.37624.70121445-5045-5055.777(5.7) high(27) high131560-6560-6551.356.78.73.3141660-6560-6551.781.38.3(16.3) high V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSIS 157.2.1 Location 1 -Siren 5 Baseline TestThis test site, shown in Figure 1as Siren 5 Baseline Test Point,is located on Strother Road at the GPS coordinates listed below.On 3/14/2013, measurements were taken in the center of the gravel road adjacent to the drive, which is slightly uphill. The roadwasbordered on each side with trees averaging 75 feet in height; it liesto the south of the Broad River Water Fowl Area.

At 9:39 A.M., siren 5 was sounded.Siren sound pressure levels were measured for twominutes during the activation. Background sound pressure levels were taken at the same location with actual run times of twominutes for 'C' weightingandtwo minutes for 'A' weighting.Figure 1Siren 5 Baseline Test PointTest Data Location 1Siren 5 Baseline Air temperature:43°F Relative humidity:40%Pressure:30.09 inHg Winds: calm at site, no wind Siren 5 @ 4,774 feet (1,455 meters) Location 1Siren 5 LOCN 34.3895 lat W 81.3775 longWeighting'AC'Background Noise LEQ(dB)43.845Run Time (min)22Projected (dB)MAX70-7570-75Observed (dB)MAX68.473.5 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSIS 167.2.2 Location 2 -Siren 40 Baseline TestThis test site, shown in Figure 2as Siren 40 Baseline Test Point,islocated just off Dawkins Rd. /State Rd.S-20-651 at the GPS coordinateslisted below.

On 3/14/2013, measurements were taken in the center of the gravel road, which is slightly uphill.The road was bordered on each side with trees averaging 60 feet in height.At 10:32 A.M., siren 40 was sounded.Siren sound pressure levels were measured for twominutes during the activation. Background sound pressure levels were taken at the same location with actual run times of twominutes for 'C' weighting and twominutes for 'A' weighting.Figure2 Siren 40 Baseline Test PointTest Data Location 2 Siren 40 Baseline Air temperature:44°F Relative humidity:37%Pressure:30.15 inHg Winds:4mphfrom WSiren 40 @ 5,260 feet (1,603 meters) Location 2Siren 40 LOCN 34.3555 W 81.3648Weighting'AC'Background Noise LEQ(dB)42.450.4Run Time (min)22Projected (dB)MAX70-7570-75Observed (dB)MAX52.368.6 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS 177.3Acoustic Group TestingFourteenacoustical measurement locationswereselected for verification testing.

Sound pressure levels of activated EWSS and background ambient sound pressure levels were taken at each of the 14specific group sample locations, within the VCSNSEPZ on 03/14/2013, 3/15/2013, 4/17/2013,and4/18/2013.The sound study in this document also includes the installation of three new 2001-130 siren locations, which are identified on the attached maps as Sites9, 108, and 109. Site 9 in the existing EPZ was established to provide additional coverage in thesurrounding area to meet current FEMA guidelines. Sites 108 and109 were established in the new EPZ to provide coverage to meet current FEMA guidelines.The 16measurement locations are identified inthetabletitled "V.C.Summer EWSS Field Test Locations"(Attachment 2). Further information on the test locations isincluded in the table titled "V.C.Summer EWSS Group Testing Results"(Attachment 7).The completeAcoustical Field Survey Forms can be found in Attachment8.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS 187.4 Acoustic Group Testing ResultsLocation 3: Group 1 Test This test site, shown in Figure 3 as Group 1 Test Point, is located off Native Drive at the GPS coordinates listed below.

On 3/14/2013, measurements were taken in the center of the gravel road. The road wasbordered on each side with trees averaging40-60 feet in height. At 11:30 A.M., sirens 40, 25, 21,5,6,8, and 10 were sounded. Siren sound pressure levels were measured for twominutes during the activation.

Background sound pressure levels were taken at the same location with actual run times of twominutes for 'C' weighting and twominutes for 'A' weighting.Figure 3Group 1 Test Point Location 3:

Group 1 Test Point DataAir temperature:50°F Relative humidity:30%Pressure:30.15 inHg Winds: 2mphfrom WNote: Site-specific comments and observations are located in Attachment 8, Page 1.Location 3Group test 1 LOCN34.37773W81.36002Weighting'AC'Background Noise LEQ(dB)3646.5Run Time (min)2 2Projected (dB)MAX60-6560-65Observed (dB)MAX51.159 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS 19Location 4: Group 2 TestThis test site, shown in Figure 4 as Group 2 Test Point, is located S20-205at the GPS coordinates listed below.On 3/14/2013, measurements were taken on the north side of a two-lane paved road.At 12:35 P.M.,sirens 15, 16,18,61,41, and 13 were sounded. Two cars went by during the ambient test. Siren sound pressure levels were measured for twominutes during the activation. Background sound pressure levels were taken at the same location with actual run timesof twominutes for 'C' weighting and twominutes for 'A' weighting.Figure 4Group 2 Test Point Location 4:

Group 2 Test Point DataAir temperature:52°F Relative humidity:25%Pressure:30.03 inHg Winds: 2mph from SNote: Site-specific comments and observations are located in Attachment 8, Page 2.Location 4Group test 2 LOCN 34.393484 W81.245504Weighting'AC'Background Noise LEQ(dB)60.462.5Run Time (min)2 2Projected (dB)MAX65-7065-70Observed (dB)MAX54.374.9 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS 20Location 5: Group 3 TestThis test site, shown in Figure 5 as Group 3 Test Point, is located ina Y area between Liston Road, S-20-225, and S-20-205at the GPS coordinates listed below.On 3/14/2013, measurements were takenin a Y grassy area between the three paved roads.At 1:30 P.M., sirens 18, 61,41,13,16, and 15 were sounded. Siren sound pressure levels were measured for two minutesduring the activation.

Background sound pressure levels were taken at the same location with actual run times of two minutesfor 'C' weighting andtwo minutesfor 'A' weighting.Figure 5Group 3 Test Point Location 5:

Group 3 Test Point DataAir temperature:56°F Relative humidity:25%Pressure:30.03 inHg Winds: 5mphfrom NWNote: Site-specific comments and observations are located in Attachment 8, Page 3.Location 5Group test 3 LOCN34.382619 W81.26144Weighting'AC'Background Noise LEQ(dB)4151.6Run Time (min)2 2Projected (dB)MAX60-6560-65Observed (dB)MAX45.572.4 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS 21Location 6: Group 4 TestThis test site, shown in Figure 6 as Group 4 Test Point, is located at an intersection onOld Airport Road at the GPS coordinates listed below.On 3/14/2013, measurements were taken on the north side of a gravel road. The road was bordered on each side with trees averaging 40 feet in height; it lies approximately 50 feeteast of a paved road.At 2:15 P.M., sirens 58, 17, 18, and 57 were sounded. Siren sound pressure levels were measured two minutes during the activation. Background sound pressure levels were taken at the same location with actual run times of two minutesfor 'C' weighting andtwo minutesfor

'A' weighting.Figure 6Group 4 Test Point Location 6:

Group 4 Test Point DataAir temperature:54°F Relative humidity:26%Pressure:30.06 inHgWinds:7mphfrom ENote: Site-specific comments and observations are located in Attachment 8, Page 4.Location 6Group test 4 LOCN34.380641W81.192235Weighting'AC'Background Noise LEQ(dB)4261.1Run Time (min)2 2Projected (dB)MAX65-7065-70Observed (dB)MAX50.271.6 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS 22Location 7: Group 5 TestThis test site, shown in Figure 7 as Group 5 Test Point, is located on Old Reservoir Road at the GPS coordinates listed below.

On 3/14/2013, measurements were taken on a gravel road adjacent to the driveway at1093 Mill Creek Shores, which ison top of a hill. The road was bordered on each side with trees averaging 40 feet in height. At 3:00 P.M.,

sirens 58, 57, 59, and 63 were sounded. Siren sound pressure levels were measured for two minutesthe activation. Background sound pressure levels were taken at the same location with actual run times of two minutesfor 'C' weighting andtwo minutesfor 'A' weighting.Figure 7Group 5 Test Point Location 7:Group 5Test Point DataAir temperature:57°F Relative humidity:24%Pressure:29.89 inHgWinds: 4mphfrom WNote: Site-specific comments and observations are located in Attachment 8, Page 5.Location 7Group test 5 LOCN34.341021W81.149513Weighting'AC'Background Noise LEQ(dB)39.553.2Run Time (min)2 2Projected (dB)MAX65-7065-70Observed (dB)MAX53.761.9 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS 23Location 8: Group 6 TestThis test site, shown in Figure 8 as Group 6 Test Point, is located on Brooks Drive at the GPS coordinates listed below.On 3/14/2013, measurements were taken on a rugged two track trail; the closest address was 497 Brooks Drive in Blair,South Carolina.The road was bordered on each side with trees averaging 50 feet in height. At 4:00 P.M., sirens 47, 46, 45, 54, and 55 were sounded. Siren sound pressure levels were measured for two minutesduring the activation. Background sound pressure levels were taken at the same location with actual run times of two minutesfor 'C' weighting and two minutesfor 'A' weighting.Figure 8Group 6 Test Point Location 8:

Group 6 Test Point DataAir temperature:63 °F Relative humidity:20%Pressure:29.93 inHg Winds: 2mphfrom S/SWNote: Site-specific comments and observations are located in Attachment 8, Page 6.Location 8Group test 6 LOCN34.3444W81.2748Weighting'AC'Background Noise LEQ(dB)35.649.7Run Time (min)2 2Projected (dB)MAX70-7570-75Observed(dB) MAX58.9 66.1 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS 24Location 9: Group 7TestThis test site, shown in Figure 9 as Group 7 Test Point,is locatedon St. Barnabus Church Road at the GPS coordinates listed below.On 3/14/2013, measurements were taken in the middle of a pavedroad. The test point is fairly open with a field atits southern border; no trees lie within a several hundred foot radius of the test point.At 4:56 P.M., sirens 43, 89, 49, 50, and 51were sounded. Siren sound pressure levels were measured for two minutesduring the activation. Background sound pressurelevels were taken at the same location with actual run times of two minutesfor 'C' weighting andtwo minutesfor 'A' weighting.Figure 9Group 7 Test Point Location 9:Group 7Test Point DataAir temperature:61°F Relative humidity:23%Pressure:29.92 inHg Winds:5mphfrom W/NWNote: Site-specific comments and observations are located in Attachment 8, Page 7.Location 9Group test 7 LOCN34.276318 W81.280414Weighting'AC'Background Noise LEQ(dB)40.958.6Run Time (min)2 2Projected (dB)MAX80-8580-85Observed (dB)MAX77.583.8 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS 25Location 10: Group 8 TestThis test site, shown in Figure 10 as Group 8 Test Point, is located on Mann Road at the GPS coordinates listed below.On 3/15/2013, measurements were taken in the center of a paved road. The road was bordered on each side with trees averaging 30 feet in height. At 9:38 A.M., sirens 68, 69, 102, and 103 were sounded. Siren sound pressure levels were measured for two minutesduring the activation. Background sound pressure levels were taken at the same location with actual run times of two minutesfor 'C' weighting andtwo minutesfor 'A' weighting.Figure 10Group 8 Test Point Location 10:Group 8Test Point DataAir temperature:45°F Relative humidity:46%Pressure:29.95 inHg Winds: 1 to 2 mphfrom WNote: Site-specific comments and observations are located in Attachment 8, Page 8.Location 10Group test 8 LOCN34.26567 W81.16158Weighting'AC'Background Noise LEQ(dB)39.849.6Run Time (min)2 2Projected (dB)MAX70-7570-75Observed (dB)MAX66.874.7 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS 26Location 11: Group 9 Test This test site, shown in Figure 11 as Group 9 Test Point, is located on Hughey Ferry Road at the GPS coordinates listed below.On 4/18/2013, measurements were taken on a dirt road at the entry of a farm field. The road was bordered on each side with trees averaging 80-100 feet in height. At 12:47 P.M., sirens 27, 31, 32, and 33 were sounded. Siren sound pressure levels were measured for two minutesduring the activation.

Background sound pressure levels were taken at the same location with actual run times of two minutesfor 'C' weighting and two minutesfor 'A' weighting.Figure 11Group 9Test Point Location 11:Group 9Test Point DataAir temperature: 59°F Relative humidity: 29%Pressure: 29.95 inHg Winds: 3 to 6 mph from SWNote: Site-specific comments and observations are located in Attachment 8, Page 9.Location 11Group test 9 LOCN 34.30209 W 81.40774Weighting'AC'Background Noise LEQ(dB)38.660.2Run Time (min)2 2Projected (dB)MAX65-7065-70Observed (dB)MAX63.678 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS 27Location 12: Group 10 Test This test site, shown in Figure 12 as Group 10Test Point, is located onS99at the GPS coordinates listed below.On 4/17/2013, measurements were taken on the side of a paved road about four feet from the edge of the pavement. The area is sparsely woodedwith trees averaging 80-100 feet in height; foliage is at 40% growth. At 2:08 P.M., sirens 4, 7, and 6 were sounded. Siren sound pressure levels were measured for two minutes during the activation. Background sound pressure levels were taken at the same location with actual run times of two minutes for 'C' weighting and two minutes for 'A' weighting.Figure 12Group 10Test Point Location 12:Group 10Test Point DataAir temperature: 82°F Relative humidity: 52%Pressure: 30.30 inHg Winds: 2 mph from SNote: Site-specific comments and observations are located in Attachment 8, Page 10.Location 12Group test 10 LOCN 34.43065 W 81.37376Weighting'AC'Background Noise LEQ(dB)3843.4Run Time (min)2 2Projected (dB)MAX65-7065-70Observed (dB)MAX58.364.2 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS 28Location 13: Group 11 TestThis test site, shown in Figure 13 as Group 11 Test Point, is located on an unmarked road at the GPS coordinates listed below.On 4/17/2013, measurements were taken in a clearing about 15 feet from the center of a gravel road. This area is not heavily wooded;it is mostly comprised of pine trees and small undergrowth with foliage at about 40% growth. At 2:30 P.M., sirens 11, 12, and 106 were sounded. Siren sound pressure levels were measured for two minutes during the activation. Background sound pressure levels were taken at the same location with actual run times of two minutes for 'C' weighting and two minutes for 'A' weighting.Figure 13Group 11Test Point Location 13:Group 11Test Point DataAir temperature: 88°F Relative humidity: 42%Pressure: 30.30 inHg Winds: 2 mph from SNote: Site-specific comments and observations are located in Attachment 8, Page 11.Location 13Group test 11 LOCN 34.43307 W 81.31365Weighting'AC'Background Noise LEQ(dB)34.351.5Run Time (min)2 2Projected (dB)MAX75-8075-80Observed (dB)MAX50.376 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS 29Location 14: Group 12 TestThis test site, shown in Figure 14 as Group 12 Test Point, is located at the corner of S36/236 and an unmarked side roadat the GPS coordinates listed below.On 4/17/2013, measurements were taken approximately30feetoff a paved road. The road was sparsely bordered on each side with trees averaging 60-100 feet in height; however, there are some open fields past the tree line. At 11:10 A.M., sirens 71 and 72 were sounded. Siren sound pressure levels were measured for two minutes during the activation. Background sound pressure levels were taken at the same location with actual run times of two minutes for 'C' weighting and two minutes for 'A' weighting.Figure 14Group 12 Test Point Location 14:Group 12Test Point DataAir temperature:74°F Relative humidity:63%Pressure:30.27 inHg Winds: 3mphfrom N/WNote: Site-specific comments and observations are located in Attachment 8, Page 12.Location 14Group test 12 LOCN34.22036 W-81.49699Weighting'AC'Background Noise LEQ(dB)51.368.6Run Time (min)2 2Projected (dB)MAX45-5045-50Observed (dB)MAX55.777 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS 30Location 15:Group 13TestThis test site, shown in Figure 15as Group 13Test Point, is located near 621 Sand Bar Road at the GPS coordinates shown below.On 4/18/2013, measurements were taken in agravel area that is approximately one footoff the paved roadand 100 feetaway from backwater. The closest trees to the testpoint are approximately 50 feet away and average 50-80 feet in height; foliage growth is only at 80%.At 2:20 P.M., sirens 95 and 104.Siren sound pressure levels were measured for two minutes during the activation.

Background sound pressure levels were taken at the same location with actual run times of two minutes for 'C' weighting and two minutes for 'A' weighting.Figure 15Group 13Test Point Location 15:Group 13Test Point DataAir temperature:75°F Relative humidity:78%Pressure:30.30 inHg Winds: 2mphfrom E/NENote: Site-specific comments and observations are located in Attachment 8, Page 13.Location 15Group test 13 LOCN34.14372 W81.36107Weighting'AC'Background Noise LEQ(dB)44.154.1Run Time (min)2 2Projected (dB)MAX60-6560-65Observed (dB)MAX51.356.7 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS 31Location 16:Group 14TestThis test site, shown in Figure 16as Group 14Test Point, is located on the corner of Westwoods Drive and Twin Pine Drive at the GPS coordinates shown below.On 4/18/2013,measurements were takenon a small paved area approximately 20 feetoff the edge of Westwoods Drive. The area was relatively open with only a few trees averaging 30-70feet in height. At 2:31 P.M.,sirens 79 and 80were sounded. Siren sound pressure levels were measured for two minutes during the activation. Background sound pressure levels were taken at the same location with actual run times of two minutes for 'C' weighting and two minutes for 'A' weighting.Figure 16Group 14Test Point Location 16:Group 14Test Point DataAir temperature:78°F Relative humidity:69%Pressure:30.24 inHg Winds: 7 to 8mphfrom S/SENote: Site-specific comments and observations are located in Attachment 8, Page 14.Location 16Group test 14 LOCN34.15581W81.39981Weighting'AC'Background Noise LEQ(dB)41.365.3Run Time (min)2 2Projected (dB)MAX70-7570-75Observed (dB)MAX51.781.3 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS 328.0SIREN ACOUSTIC COMPUTER MODEL ANALYSIS8.1 Description of Calculations UsedTheacoustic computermodelanalysis wasdoneusingSoundPlanacoustic modelingsoftware. This software includes many industrystandardacoustic modeling options. The modeling standard chosen for this analysis is the ConservationofCleanAirandWaterinEurope(CONCAWE) modeling standard. The CONCAWE model was selected because includes additional environmental attenuation parameters based on Pasquill-Turner stability classes A-D in addition to air and ground absorption criteria.CONCAWEwasestablishedin1963byagroupofoilcompaniestoresearch environmental issues relevanttotheoilindustry.In1981,theypublishedReportNo.4/81,ThePropagationofNoisefromPetroleumandPetrochemical Complexesto NeighboringCommunities,whichhasbeenextensively validatedandutilizedasthebasis ofanumberofpredictionmodelsfor a varietyofnoisesources.TheCONCAWEmodelcalculates thesoundpressurelevelataremotepointusing thefollowingformula:Lp=Lw+D-For the calculation of Lp, thedirectivity Dfrom the source to the remote pointwas set to 0 because the 100' rating used wasconsidered to be in the far field from the siren.-is thesumoftheindividualattenuationsdueto theseven attenuation effects listedbelow:geometric spreadingatmosphericabsorptiongroundeffectsmeteorological effectssource heighteffectsbarriersin-plantscreeningInadditiontotheaforementionedparameters,CONCAWE considersadditional atmosphericandmetrological conditionsandeffectsusingPasquill-Turnerenvironmentalmodels A throughD. The Pasquill-Turner scale measures the atmospheric turbulence effect due to incoming solar radiation, wind and cloud cover. The strongest lapse condition (A) was used in the acoustic model to represent the most conservative sound propagation condition. Excessattenuationduetothese effectsthatcan causeshadowzones is included in the model.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS 33TheSirenAcoustic ComputerAnalysis Modelutilizedfor theVCSNSincludestheeffectsoftemperature,humidity,barometricpressure,atmosphericabsorption,groundabsorption,sirenheightandfrequency,terrain,andbarriers inthesound pathincludingbuildings,trees,andotherobstaclesthatmightinterfere withthepath ofsoundfromthesource (sirenhorn) tothereceivers (humans intheEmergency ProtectionZone).8.2 Assumptions UsedTheacousticmodeluses agroundclassificationof0for softground,0.5formediumground,and1for hardground.A average groundfactorof0.25was used in thepredictionmodel to accountforgroundabsorption.The softer than average ground chosen provides additional attenuation compared thus a more conservativeestimate.Differencesinthemeasuredandmodeledsoundlevels can be attributed tothefactthat the modelis based on averaged conditions throughout the coverage area.

Measurementsweretakentovalidatethemodel. Asaresultoftesting,the measuredvaluesvalidate thegeneral accuracyoftheoverallmodelandallow predictions inthetotalareatobeevaluatedwithouttakingmeasurementsatevery locationinthecoveragearea.Temperaturesandwindspeedsvaryconsiderablyoverdiverse terrain;formodelingpurposes,theaverageobserveddaytimetemperature, pressure,and humiditywere used and wind speed was set to zero. These average summertime environmental parameters represent the worst case environment for sound propagation. As a result of using these parameters, the coverage maps show a conservative estimate of the sound propagation. Average summertime temperature, air pressure, and humidity values were calculated using the data supplied. These averages (for the months of June 2012, July 2012, and August 2012) were calculated to be Temperature: 81.29 F / 27.38 C, Pressure: 29.98 Inches of Mercury / 1015 mbar, and Humidity: 67.14% and Pasquill-Turner Class A. All sirens were set to a height of 13.716 meters (45 feet).

Each of the sirens in the acoustic model was modeled using SPL and 1/3 octave frequency analysis obtained from Federal Signal anechoic chamber test data as shown in the following figure.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS 34Frequency spectrum of Federal Signal 2001 SirenThe reference levels used in the acoustic model were input based on this data. The Sound level at 100 ft. reference for the Federal Signal 2001-130 sirens was set to and equivalent 124 dbL for the acoustic model, and the sound level for the Federal Signal2001-SRN sirens was set to 122 dBL at 100 ft.8.3Coverage Maps Fieldacoustical coveragetestsofselectsirensandlocationswere performedintheVCSNSEPZtoconfirmthattheactual coverageareamatchedthesoundcoverage calculationstoensure thatthesoundpropagationmapwasanaccurate representationofthesirenacousticalcoverageintheEPZ.Theoverallcoverage map(Map2)detailsthe14testlocations in relation to the existing sirens located in the EPZ. Inorder toverifytheaccuracyoftheSoundPLAN Acoustical CoveragePredictions(Map2) actualonsitetestmeasurementswerecomparedwiththepredictedvalues.

The results of the actual versus predicted values are presented in Section 7.2 Table 1 of this report.Thetestresultsgenerallymatchedthepredictedcalculations.Eachofthetest locationswasevaluatedandaconclusionwithrecommendations isincluded with this report.A reviewofthefinalcoveragemap(Map3) providesanoverviewofVCSNS's currentsoundcoverageforboththecurrentandexpandedEPZasdeterminedfrom individual sitetestingandacousticmodeling.Map3alsoportraysthecoveragefor theadditional2001-130sirenstobeinstalledatSites9,108,and109.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSIS 359.0

SUMMARY

/CONCLUSIONSAll testing was performed between 9:30 A.M. and 5:00 P.M. with the majority of the testing taking place in the mid-morningto mid-afternoontimeframe during peak sun and in most cases with little or no cloud cover and light wind conditions. This particular test scenario provides a worst case temperature gradient for acoustic shadows hence the most conservative results. Aground factor of 0.25 has been used in the SoundPLAN Acoustic Model to provide a conservative estimate. Efforts were takento observe and correct for events, which caused the data to be skewed at individual test sites. Events such as vehicle traffic, wind gusts, gun shots, logging operations, and other noise inducing anomalies were taken into consideration as individual sitedatawas reviewed.Measured SPL levels taken during the group tests generally correlate with the acoustical contours on the coverage map over the various types of terrain, elevations, and 2001-SRNB 128 dB siren types predominant through the VCSNSEWSS.

Testing and acoustic modeling showsthe VCSNSarea of concern (existing and expanded EPZ) meets standards which state the EPZ must be generally covered by an alert and notification system which reaches a sound level of at least 60 dB where the population isbelow 2,000 people per square mile as required by NUREG-0654/FEMA-REP-1 and the guidelines set forth in FEMA-REP-10.The resultsassume the installation of additional warning siren sites at locations identified as Sites 9, 108, and 109. Site 9 provided additional coverage to an area that was weak in the existing EPZ. Sites 108 and 109 were required additions in the expanded EPZ.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSISAttachment 1Page 1 of 6SCANA Acoustical Study For V.C. Summer Nuclear PlantSubmitted by: West Shore Services Inc.l6620 Lake Michigan Dr. l Allendale, MI 49401 l PH: 616-895-4347 Install Site #RTU ID #Coordinates (Latitude (N))Coordinates (Longitude (W))Site AddressCityCountyState1134.39600-081.42168856 Mt Pleasant Rd. (Rt. 28)PomariaNewberrySC2234.39429-081.443112198 Mt Pleasant Rd. (Rt. 900)PomariaNewberrySC3334.38148-081.427041505 Deerfield Dr. PomariaNewberrySC4434.41835-081.40103165 SC -S-20-12 Spur (Granite Rd)BlairFairfieldSC5534.39458-081.3921920435 SC -34 W (Newberry Rd.)BlairFairfieldSC6634.40889-081.37334Rocky 2 Rd. (Rt 104)BlairFairfieldSC7734.41618-081.35921Blair Volunteer Fire Dept.BlairFairfieldSC8834.38044-081.31802169 Meadowlake Rd.BlairFairfieldSC 9 4934.21409-081.47845213 Cy Shumpert Rd.

-NewberrySC101034.42496-081.33228Newberry Rd. (Hwy 34)BlairFairfieldSC111134.42363-081.32285Newberry Rd. (Hwy 34)BlairFairfieldSC121234.41861-081.30171Newberry Rd. (Hwy 34)BlairFairfieldSC131334.39361-081.29190Highway 215

-FairfieldSC141434.42051-081.28455Hopewell Church Rd.BlairFairfieldSC151534.41544-081.25053Newberry Rd. (Hwy 34)WinnsboroFairfieldSC161634.40278-081.22119Newberry Rd. (Hwy 34)WinnsboroFairfieldSC

4Site 9 is a new site in the existing EPZ, required to provide coverage to meet the current FEMA guidelines.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 1Page 2 of 6 Install Site #RTU ID #Coordinates (Latitude (N))Coordinates (Longitude (W))Site AddressCityCountyState171734.40071-081.19941Jackson Creek Rd.WinnsboroFairfieldSC181834.37656-081.223041930 Old Harden Rd.WinnsboroFairfieldSC191934.36976-081.44817Consolidated Fire Dept. (Hwy 34)PomariaNewberrySC202034.25676-081.392134553 Hwy 176PomariaNewberrySC212134.37046-081.4064810313 Old Broad River Rd. (Rt. 28)PomariaNewberrySC222234.35857-081.428842271 Suber Rd. (Rt. 351)PomariaNewberrySC232334.34719-081.469591978 Livingston Rd. (Rt. 572)PomariaNewberrySC242434.34275-081.43238350 Frances Rd.PomariaNewberrySC252534.34444-081.390148302 Old Broad River Rd. (Rt. 28)PomariaNewberrySC262634.32663-081.404442155 Leitzsey Rd. (Rt. 494)PomariaNewberrySC272734.31022-081.43169New Hope Rd.PomariaNewberrySC282834.32167-081.445561609 Griffin Rd.PomariaNewberrySC292934.31821-081.4758311248 Hwy 176PomariaNewberrySC303034.29074-081.476761640 Road 219ProsperityNewberrySC313134.28755-081.446589 Bonner Rd.PomariaNewberrySC323234.29942-081.383481003 Hughey Ferry Rd.PomariaNewberrySC333334.27674-081.386771441Peak Rd.PomariaNewberrySC343434.26414-081.41537Pomaria Fire StationPomariaNewberrySC353534.25639-081.442403309 HWY 773PomariaNewberrySC363634.25819-081.4646812 Boinest Rd.ProsperityNewberrySC373734.26080-081.483253276 Old Jolly Street ProsperityNewberrySC V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 1Page 3 of 6 Install Site #RTU ID #Coordinates (Latitude (N))Coordinates (Longitude (W))Site AddressCityCountyState383834.26254-081.354762273 Broad River Rd.PomariaNewberrySC393934.29261-081.3612148 Magnolia LnPomariaNewberrySC404034.35055-081.34854352Dave Cole Rd.BlairFairfieldSC414134.33698-081.338941995 Cole TrestleBlairFairfieldSC424234.26310-081.30704Hwy 213 at NND

-FairfieldSC434334.27425-081.28873Hwy 213 & Hwy 215JenkinsvilleFairfieldSC444434.30507-081.287288410Hwy 215FairfieldSC454534.32437-081.28661Overlook Park on Hwy 215JenkinsvilleFairfieldSC464634.35828-081.298484589 S Hwy 215

-FairfieldSC474734.36356-081.27537355 Twisted LaneBlairFairfieldSC484834.31327-081.2695512621 Hwy 213JenkinsvilleFairfieldSC494934.29652-081.266203708 St. Barnabas Church Rd.-FairfieldSC505034.28893-081.257553177 St. Barnabas Church Rd.-FairfieldSC515134.25809-081.2643712634 Hwy 215 S

-FairfieldSC525234.27817-081.234572066 Koon Store Rd.WinnsboroFairfieldSC535334.31250-081.234246668 Landis Rd (County Rd. 48)WinnsboroFairfieldSC545434.33036-081.23731130 Anderson Quarry RdWinnsboroFairfieldSC555534.33810-081.23038Hwy 213WinnsboroFairfieldSC565634.34236-081.21066Hwy 213WinnsboroFairfieldSC575734.35009-081.19819196 Old Hill Crest School Dr.-FairfieldSC585834.35626-081.17653Hwy 213 at Jackson Creek Rd.WinnsboroFairfieldSC V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 1Page 4 of 6 Install Site #RTU ID #Coordinates (Latitude (N))Coordinates (Longitude (W))Site AddressCityCountyState595934.32496-081.17719Jackson CreekWinnsboroFairfieldSC606034.31520-081.201526167 Reservoir Rd.WinnsboroFairfieldSC616134.37116-081.23038130 Old Harden Rd.WinnsboroFairfieldSC626234.31237-081.16428Chappell Town Rd.WinnsboroFairfieldSC636334.32312-081.152422534 Reservoir Rd.WinnsboroFairfieldSC646434.30186-081.152114 Fleming Ln.WinnsboroFairfieldSC656534.28385-081.201002250 Glenn's Bridge Rd.WinnsboroFairfieldSC666634.26838-081.215291883 Glenn's Bridge Rd.WinnsboroFairfieldSC676734.25034-081.211123298 Estes Ln.WinnsboroFairfieldSC686834.26879-081.178562207 Landis Rd. (County Rd 48)WinnsboroFairfieldSC696934.27974-081.157636537 Jackson Creek Rd.WinnsboroFairfieldSC707034.25858-081.15204Hwy 269WinnsboroFairfieldSC717134.23529-081.451093184 Kibler's Bridge Rd.ProsperityNewberrySC727234.20903-081.443591174 Kibler's Bridge Rd. ProsperityNewberrySC737334.22681-081.42282287 Central School Rd.PomariaNewberrySC747434.24224-081.41471117 Koon Trestle RdPomariaNewberrySC757534.22658-081.385192247 Parr Rd.Little MountainNewberrySC767634.21439-081.413311338 Hwy 202Little MountainNewberrySC777734.22043-081.40385508 Four Oaks Rd.Little MountainNewberrySC V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 1Page 5 of 6 Install Site #RTU ID #Coordinates (Latitude (N))Coordinates (Longitude (W))Site AddressCityCountyState787834.23387-081.40549390 Harris Rd.PomariaNewberrySC797934.19682-081.41446Little Mountain Fire Dept.Little MountainNewberrySC808034.17476-081.38635555 Lazy Brook Dr.Little MountainLexingtonSC818134.20281-081.384812358 Holy Trinity Church Rd.-NewberrySC828234.18764-081.371611032 Sam Koon Rd.ChapinNewberrySC838334.19952-081.35078211 Red Knoll Rd.ChapinLexingtonSC848434.22346-081.355211426 US 176Little MountainNewberrySC858534.24397-081.3720428 Hope Station Rd.PomariaNewberrySC868634.23520-081.32681R Stoudemayer Rd.Little MountainNewberrySC878734.208494-081.323722Broad River Rd.

-RichlandSC888834.22274-081.31056Mike Stuck Rd.

-RichlandSC898934.20710-081.288881550 Wash Lever Rd.

-RichlandSC909034.20792-081.2602199 Desport Sites Rd.Little MountainRichlandSC919134.22348-081.24250Wallaceville Rd.WinnsboroRichlandSC929234.18339-081.25555Freshly Mill Rd/Pet Sites Rd.IRMORichlandSC939334.17985-081.29094 11867 Broad River Rd.ChapinRichlandSC949434.17878-081.32018685 Columbia Ave (County Rd. 48)ChapinLexingtonSC959534.14939-081.32730145 Crooked Creek Rd.ChapinLexingtonSC V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 1Page 6 of 6 Install Site #RTU ID #Coordinates (Latitude (N))Coordinates (Longitude (W))Site AddressCityCountyState969634.16005-081.28243993 Three Dog Rd.ChapinRichlandSC979734.16939-081.25159Kennerly Rd/Uldeen Sites Rd.IRMORichlandSC989834.18487-081.22900Freshly Mill Rd/Page Derrick Rd.IRMORichlandSC999934.24625-081.2491413928 State Hwy 215 S

-FairfieldSC10010034.22563-081.2216416079 State Hwy 215 S

-FairfieldSC10110134.20839-081.19588Hwy 215/Browns Bridge Rd.WinnsboroFairfieldSC10210234.23523-081.16548289 Louden Cir.WinnsboroFairfieldSC10310334.24640-081.179971004 Estes Ln.WinnsboroFairfieldSC10410434.16740-081.34943Chapin Fire Dept.ChapinLexingtonSC10510534.26366-081.33109Parr HydroJenkinsvilleFairfieldSC10610634.44176-081.30008Hwy 215/Cooper Holmes Rd.-FairfieldSC10710734.31188-081.11893Kelly Miller Rd.BlairFairfieldSC 108 510834.14732-081.35598179 Farrs Lake Ct.ChapinLexingtonSC 109 610934.155910-081.399775836 Westwood Dr.ChapinLexingtonSC

5Site 108 is a new site in expanded EPZ, required to provide coverage to meet the current FEMA guidelines.

6Site 109 is a new site in expanded EPZ, required to provide coverage to meet thecurrent FEMA guidelines.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSISAttachment 2Page 1 of 3V.C. Summer EWSS Field Test Locations (16)Loc 1 Siren 5 Reference Baseline 7Sirens To Sound Zone: 17 5465299 m ELatitude: 34.38953805409 m NLongitude: 81.3775Loc 2Siren 40 Reference Baseline 8Sirens To Sound Zone: 17 40466452 m ELatitude: 34.35553801635 m NLongitude: 81.3648Loc 3Group 1 TestSirens To Sound Zone: 1740,25,21,5,6,8,10467343 m ELatitude: 34.377733803916 m NLongitude: 81.36002Loc 4 Group 2 Sirens To Sound Zone: 1715,16,18,61,41,13477433 m ELatitude: 34.3934843805813 m NLongitude: 81.245504Loc 5 Group 3 Sirens To Sound Zone: 1718,61,41,13,16,15475965 m ELatitude: 34.3826193804612 m NLongitude: 81.26144Loc 6 Group 4 Sirens To Sound Zone: 1758,17,18,57482327 m ELatitude: 34.3806413804379 m NLongitude: 81.192235Loc 7 Group 5 Sirens To Sound Zone: 1758,57,59,63486248 m ELatitude: 34.3410213799979 m NLongitude: 81.149513

7Baseline Test for Federal Model 2001-130.

8Baseline Test for Federal Model 2001-SRNB.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSISAttachment 2Page 2of 3Loc 8 Group 6 Sirens To Sound Zone: 1747,46,45,54,55475042 m ELatitude: 34.344453801044 m NLongitude: 81.24484Loc 9 Group 7 Sirens To Sound Zone: 1743,89,49,50,51474188 m ELatitude: 34.2763183792830 m NLongitude: 81.280414Loc 10 Group 8 Sirens To Sound Zone: 1768,69,102,103486129 m ELatitude: 34.265673791134 m NLongitude: 81.16158Loc 11Group 9 GPSSirens To Sound Zone: 1727,31,32,33462479 m ELatitude: 34.302093795727 m NLongitude: 81.40774Loc 12Group 10 GPSSirens To SoundZone: 174, 6, 7465659 m ELatitude: 34.430653089970 m NLongitude: 81.37376Loc 13Group 11 GPSSirens To Sound Zone: 1711, 12, 106471182 m ELatitude: 34.433073810220 m NLongitude: 81.31365Loc 14 Group 12 GPSSirens To SoundZone: 1771, 72454222 m ELatitude: 34.3220363786701 m NLongitude: 81.49699Loc 15Group 13 GPSSirens To Sound Zone: 17 95, 104466712 m ELatitude: 34.143723778150 m NLongitude:81.36107 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSISAttachment 2Page 3of 3Loc 16Group 14 GPSSirens To Sound Zone: 17 79, 80463145 m ELatitude: 34.155813779504 m NLongitude: 81.39981 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSISAttachment 3Page 1 of 14Weather History for Columbia, SCJanuary 1, 2012 through December 31, 2012 January 1 2012-TO -December 31 2012 GoMaxAvgMinSumTemperatureMax Temperature 109°F 78°F 40°F Mean Temperature 92°F 67°F 33°F Min Temperature 79°F 55°F 19°F Degree DaysHeating Degree Days (base 65)32501858Cooling Degree Days (base 65)27702507Growing Degree Days (base 50)421706281Dew PointDew Point 79°F 53°F 2°F PrecipitationPrecipitation 2.88in 0.13in 0.00in 41.73in Snowdepth----WindWind 43mph 5mph 0mph Gust Wind 130mph 21mph 16mph Sea Level PressureSea Level Pressure30.64in 30.05in 29.50in V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSISAttachment 3Page 2 of 14 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSISAttachment 3Page 3 of 14 2012 Temp. (°F)Dew Point (°F)Humidity (%)Sea Level Press. (in)Visibility (mi)Wind (mph)Precip. (in)Events Janhighavglowhighavglowhighavglowhighavglowhighavglowhighavghighsum 173533255433092735330.1930.0929.971072248320 25746343620882511930.1430.0629.991010102412300 3403325138555402530.3830.2830.161010102311290 45035191711584501530.4330.330.1610108144180 562463032251376522730.1730.1230.0810108156180 669503133292785542230.1630.0830.031096155180 773584352453386664630.1230.05301010818722T 873594557524393714930.2230.1830.1107191130.05 Rain 9625751565351100897830.230.1530.09103091100.01 Fog, Rain 10615753565452100928430.130.0429.9782010312T Fog, Rain 11655851615541100805929.9629.7429.5610402210290.4 Fog, Rain 1265554448432682634429.7929.6929.62101010381146T Rain 1346393120181459453130.1430.0329.861010103615440 1451392625191475492230.2930.230.16101010237290 1554423029252185572930.5330.3730.1510109155200 1659442835302492633330.630.4930.3710106143200 1769554156483692745530.3530.16301093238310.17 Rain 1861493758463293674030.0929.9929.8910106186230.1 Rain 1954443335292389654130.2430.1430.071010992160 2058453252402993755730.1730.1230.04109212270.11 Rain 21625854585447100806030.0729.9929.91060186240.75 Fog, Rain, Thunderstorm 22574941554538100887630.3130.2130.081050168230.02 Fog, Rain 23554841544639100969230.2730.1330.04110123150.06 Fog, Rain 24715641544942100693730.2330.1430.041060124150 Fog 25675135463934100673430.3230.2430.171070101120 Fog 26756146615343100795730.1730.0229.781080156210 Fog 2768554263503890664230.0529.8229.68101022912380.09 Rain 2867513540352892592630.2230.1130.04101010176220 2959453132221278481730.4130.3330.24101010145180 3065472931231678471530.4730.3930.34101010103130 3168513436292379491930.4430.3730.310109133160 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 3Page 4 of 14 2012Temp. (°F)Dew Point (°F)Humidity (%)Sea Level Press. (in)Visibility (mi)Wind (mph)Precip. (in)EventsFebhighavglowhighavglowhighavglowhighavglowhighavglowhighavghighsum173563855453385623830.3230.2130.11086124180.01Rain274614858513293643430.2930.1330.06109617722TRain364524036322970492730.4630.3930.3101010175210474624953463486664630.3530.230.04101010164200578655157514290633630.1930.0429.961010821928T651484540373676696130.2730.2130.1710109146180760473440342892623130.230.1630.13109682150864483239352992643630.1930.1430.07109613221TRain954423035302792653830.3230.2430.1910961211501060453042362892714930.2230.0829.9197471100115342304424293572130.229.9329.8110106261338T12473726157358391930.3530.2730.22101010229300135739202315977461530.3230.2230.141010101221701458504243352471564130.1530.130.03101069212TRain1568554248403783583230.2530.230.1210951041501664574961534697877730.2230.1230.011051103140.12Rain1766554353474193714830.1430.0830.0410106921201868533851423393612930.1130.0429.941084102140.19Rain19574839544633100928329.9629.7929.641061168230.9Rain2056463635312589603030.3230.21301010101542202164483144373089684630.3230.230.0610961742202275614654474193623130.0529.8629.65101062092502381695763575093653629.7429.6829.6310922311330.16Rain2473625166602993745429.9529.7129.6410703014410.86 Fog , Rain , Thunderstorm2557483831251970472330.3230.1729.9910101029113302660483630241976502330.5130.4330.341010101462002756514552463293704630.4330.3930.32106173100.16Rain28716150524943100703930.4130.3530.28105013415TFog , Rain2975655464564690756030.2730.1129.911096176250.06Rain V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 3Page 5 of 14 2012 Temp. (°F)Dew Point (°F)Humidity (%)Sea Level Press. (in)Visibility (mi)Wind (mph)Precip. (in)EventsMarhighavglowhighavglowhighavglowhighavglowhighavglowhighavghighsum181736563615587654229.9429.8829.82101010181025TRain2807059646259100765229.9529.8729.741081259310.19Rain , Thunderstorm372645663595393816829.7629.7229.651092437480.32Rain , Thunderstorm457483952311593582230.129.8829.72101043712470.31Rain564513729221359371430.530.230.021010103312450662493537221661391730.6430.5930.51101010157200772594649443876594130.6130.5330.43101010155230877624758514496663630.4330.2930.141096166200967574661533787654230.330.1730.11109616621TRain1065513736302285542230.4830.4130.311010102072501170574347393376553430.5630.4730.41010101042101275614753494589643830.4230.3530.27101081451701377685863575390745730.2830.2330.1610106144170.13Rain1485695361554597622630.2730.2130.16105092140Fog1588715460544693592530.2830.2230.161096133170Fog1687746061574990602930.2430.1830.110109145180Fog1785725861575593653730.2430.1830.111010920426TRain , Thunderstorm1881685559565293663930.330.2230.18109413218T1988725659565193612930.2230.1630.081094921602085725861585490643730.2330.1630.11010613316021837158646055100704030.2930.2330.161060254290Fog2283736365625793684330.2730.2130.131070153200.05Fog23827261666259100734630.1630.0929.981060213280.04Fog , Rain2482746564615693694529.9829.8529.741080227280.02Rain , Thunderstorm2571625260514893714929.8429.7829.7210108209330.02Rain2683705653483886542130.0429.9329.841010101452002772635350352877502230.3230.2230.061010101872302882685359514377573730.2530.1229.9710942272902987735857535175533029.9829.9329.86101061872403086725862544980552929.9829.9129.851096295380.01Rain3179726565625393735229.9129.8229.761093176220.09Rain V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 3Page 6 of 14 2012 Temp. (°F)Dew Point (°F)Humidity (%)Sea Level Press. (in)Visibility (mi)Wind (mph)Precip. (in)EventsAprhighavglowhighavglowhighavglowhighavglowhighavglowhighavghighsum184695460544593602629.8929.8229.7710106153210.02Fog291766165605590613229.929.7829.7310108267390.04382736466625787715430.0129.9429.881082215280.27Rain , Thunderstorm4877461636158100704029.9229.7929.661095167240.01585725864615287664429.7529.6829.61096218280666564652443789623430.0929.929.74109321828TRain774573946393089562330.2830.1830.11101010132170882665049443983532330.1730.0829.99101010165210980685650372772431430.1230.0129.91101061862401082654749403171451830.0429.9429.86101010311039TRain1168605142271948321630.143029.8810101020102601267544137272182512030.2630.1930.131010101542301375563744362885521930.2730.2130.161010101221701480614258443889592830.3530.2630.181010101852901582726161595690684530.2430.2130.17101091862501687735959575587623730.2330.1830.121010101562001788756263595687623630.1830.1230.031010101351701873665963595690745730.0930.0630.021096175200.02Rain1967635856555593816830.0830.043010851061402072676160575587776630.0229.9529.8610849312TRain2183736264605693684229.8829.7829.671070152170.04Fog2269615264584793806729.6729.5729.51082286351.76Rain , Thunderstorm2363534246352883562929.8129.6829.6210101024113202470543837322876492229.8829.8329.7910101028103502583685257484071533429.9729.9129.851010101542202689786766534878522629.9729.8929.83101092812370.12Rain , Thunderstorm27887765696258100724330.0429.9729.891010815621T28847566696662100795830.1230.0830.02840154220Fog2989776465615687613430.1830.1230.071084931303088776667656193684330.2130.1530.081095167220 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 3Page 7 of 14 2012 Temp. (°F)Dew Point (°F)Humidity (%)Sea Level Press. (in)Visibility (mi)Wind (mph)Precip. (in)EventsMayhighavglowhighavglowhighavglowhighavglowhighavglowhighavghighsum190786666646090654030.230.1330.0610107145210291817066635590623430.1730.1130.06101010156200388776666646093674030.1830.1230.0610107125150487786967646284644330.0930.0429.96101010134200595816669635993633229.9529.8829.791092216310.19Rain , Thunderstorm6847667716562100775429.9929.9429.8810104175200.05Rain785766767615693653730.0329.9829.91101062082408837465676463100775429.9829.9329.85108117621T976706469666097867429.929.7929.691060253320.95Rain , Thunderstorm1079675459504293612829.9529.8529.7810961442101180685653463686572830.2130.129.961010101872401280695759534786593230.3330.2630.22101091351801376706368635693776030.2430.1630.091073175210.17Rain14837566726662100795830.0829.9929.891081206230.23Rain158978667065619769403029.9529.891071295350.82Rain , Thunderstorm16847565706763100785529.9829.9329.881082182230.3Rain , Thunderstorm1781736470646110079583029.9529.911072234320.83Rain , Thunderstorm1876706363595293714930.0930.0329.981095166220.05Rain1980716155514778563330.1330.0830.031010101662102086736058514772502830.130.0529.991010101773002187746164595790643730.0429.9629.871010101011602287756368615797694029.8929.8429.7710105184220.04Rain , Thunderstorm2388766467615393623129.9129.8529.81109615418024907865686357100673430.0229.9629.91070124160Fog2593806668646093653630.1230.0630.0110961241502693806668645987623630.1230.0730.0110961872602790817270666379624430.130.0529.991010101792202890827472706793704730.043029.951091301037TRain , Thunderstorm2985787173716793765929.9729.9129.811071166230.84Rain , Thunderstorm3091806969665790623429.8429.7729.711094176220.24Rain3193806668635490592829.929.8529.810106156180 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 3Page 8 of 14 2012 Temp. (°F)Dew Point (°F)Humidity (%)Sea Level Press. (in)Visibility (mi)Wind (mph)Precip. (in)Events Junhighavglowhighavglowhighavglowhighavglowhighavglowhighavghighsum188796971686493735329.8929.8229.731071296450.77Rain , Thunderstorm282736368564890613129.9329.8529.7910101015622038873576153498656263029.9229.86101010205230484766869666093745529.8529.7729.711093207230.21Rain , Thunderstorm574696465626093796429.8729.8129.711072163210.6Rain67871636360559369453029.929.84109615518TRain783726063595793694530.0630.0229.99101010102140886736064595593653730.0730.0329.9810107123140989766263585290602930.130.0630.01101061342101080757073706294816830.1430.130.041080176221.25Fog , Rain1180767273716893867930.1130.0830.031081187241.04Rain1285787172706893796530.0629.9629.871092186230.31Rain , Thunderstorm1391817070686690705029.9729.9229.881010102232601486797169595090623430.1230.0529.971010101462001586766663575078553130.1930.1430.11010101772301685736159524584562830.2530.1830.111010101662301786725862585590654030.1830.130.011010101031301888766364615887654230.1230.0730.04101071231601989786666646187654230.1930.1430.11101071231602091806968666484644430.1930.1330.07101081431602193827068666484634130.130.0229.921010101231602294826968656184593329.9729.9129.851010101361502395837172686390633629.9929.9329.910101014421T248982747672688769503029.9529.881010618522TRain2590817171696793704729.9129.8129.711010101241602685787072605187613429.8629.7929.721010923113202789766257524872482429.9929.9429.8610101016621028100816162564978481830.0529.9829.9210101014621029109907168605173451629.929.8529.781010712415030109927578686379522429.8829.8429.81096124160 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 3Page 9 of 14 2012 Temp. (°F)Dew Point (°F)Humidity (%)Sea Level Press. (in)Visibility (mi)Wind (mph)Precip. (in)EventsJulhighavglowhighavglowhighavglowhighavglowhighavglowhighavghighsum1106907379746891623230.1329.9329.871050185441.3Rain , Thunderstorm295847272696584654630.1330.0229.951010101271703100877373686387593130.0229.9829.91101010234300499846872675993653630.0429.9829.9110107105-05102897672696382562929.9729.9329.861096204220698867473696682593529.9929.9529.91101091251807100887572696682583330.0429.9929.93101091361508102917971686374522930.0129.9529.85101092092409103897473686167462529.9529.929.811091269522.88Rain , Thunderstorm1093837274726994755630.0629.9629.91072285351.26Rain , Thunderstorm1191827273706894714730.1130.0429.991092174220.29Rain1289817373717093735230.1530.0930.05109421525TRain13878174757270100877430.1730.1430.091060155180.26Fog, Rain, Thunderstorm14928374757369100754930.2130.1630.11060214260.03Fog1593837373706594684130.230.1430.061010101532001693837375726993714930.130.0329.9610107133170.08Rain179483727471679468413029.9629.91010101031501895857572716987674630.0329.9829.9210105244310.021995847373716988674630.0630.0129.9510107187230.2Rain , Thunderstorm209485757471688767463029.9629.91101010211025T2189837675736985725930.130.0329.9710107178210.11Rain , Thunderstorm2297867576726887654230.1730.1330.08101010214250.02Thunderstorm2394867776736688694930.1930.1330.0510102235300.16Rain , Thunderstorm2499897874726885623830.0629.9729.88101010248300.01Rain2594857674716894694429.9829.9329.910101013317T26101907876716391602929.9229.8829.82109618623027100897875716874563829.9529.929.8610104207260.04Rain , Thunderstorm2897867576736887684930.0129.9629.891010101532102995857474716794684129.9929.9529.891090163200.03 Fog , Rain , Thunderstorm3095847372706693674129.9929.9529.8810822643703188796973706694755529.9829.9429.911071252320.27Fog , Rain V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 3Page 10 of 14 2012 Temp. (°F)Dew Point (°F)Humidity (%)Sea Level Press. (in)Visibility (mi)Wind (mph)Precip. (in)EventsAughighavglowhighavglowhighavglowhighavglowhighavglowhighavghighsum194847373706594684129.9429.8929.841071123160Fog297867472706693663829.9529.8929.83109623629TRain , Thunderstorm395837174696684634130.0529.9829.9410109186290495867673716894694430.1930.1130.0510107207240593847475716888684730.2130.1630.11101010235280694857574736994724930.1530.0930.021070242282.12Fog , Rain , Thunderstorm790827475747194755630.0630.0129.961061254331.09Rain , Thunderstorm891827373726994735230.0329.9929.921092215260.19Fog , Rain992827174716893714930.0229.9429.851090295402.24Fog , Rain , Thunderstorm1084797374726993776129.929.8729.831095157200.02Rain1180767274716994847429.9529.9129.881094174230.34Rain , Thunderstorm1291827272695993643430.0129.9729.9310921031401391796667625593623030.0529.9929.9510106123150Fog1489796871676387695129.9829.9429.881010916522T1592827272686493694429.9729.9329.9101062052401692816969655890613230.0429.9929.93101071021601792827173706790674429.9929.929.821093204260.06Rain , Thunderstorm1890817273706693704729.9129.8729.8110969213T1984797373716993796529.9129.8629.831071163210.89Rain2085787073706794755529.9629.8929.831093124180.35Rain2186797173696693745530.0429.9929.9410109134200.042286797173706693725130.0930.0530.011096123160.082387797072696493725130.1230.0930.051090234291.96Fog , Rain , Thunderstorm2487786870655693643530.1330.0930.05101061552202588766365605493643530.1530.1130.07101071242202690776368646193674030.1730.1130.0610961331602790796874696488705230.1130.0629.991010723530TFog2885807576747294827030.0229.9929.951070143180.36Fog , Rain2988827575747394816830.0229.9729.941060132210.07Fog , Rain , Thunderstorm3084797474737294826930.1630.0829.991096718TRain31938373747269100734630.2330.1730.111060102130Fog V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 3Page 11 of 14 2012 Temp. (°F)Dew Point (°F)Humidity (%)Sea Level Press. (in)Visibility (mi)Wind (mph)Precip. (in)EventsSephighavglowhighavglowhighavglowhighavglowhighavglowhighavghighsum196857375726993684230.1530.0930.0210106134160295857575737094704630.053029.931092234290.2Rain , Thunderstorm390837575737194796330.0129.9829.951092254320.11Rain , Thunderstorm49183747372729475563029.9629.911010918522TRain589817372716993745529.9929.9329.8810105145210689827475727087725629.9929.9329.8810109135180793847474726994724929.9629.929.85109613325T892837473727093714929.8529.829.731092205260.38Rain983746472635793684329.9929.8829.7910104135200.02Rain1084725961565193643430.1430.0729.991010101332201183715960585593674030.2930.2230.14101061031401283715859565293653730.3430.2830.24101081332101382705862595687674730.3230.2630.21101061331601487746164615790654030.2430.1830.131010101021401588756265625993663930.1830.1230.071010101021401687776668656193684230.1330.0830.021010109312T1788807172696493704630.0629.9929.911091266320.12Rain1880767273716894837129.8929.7929.731081188230.69Rain1981746670635793714830.1129.9729.8410106157200.01Rain2081716163585587664530.1430.0930.041010101241502185736065615893694430.0930.0529.99101061021302288776567646293684330.0429.9929.93101041661602383715966534384542430.1130.0529.97101091341702479685655504387623630.230.1530.081010101451802582675256535089643930.2430.230.171010292150Fog2686715560555086583030.2330.1930.1410101080120Fog2788745970635793653730.2230.1630.081081921402889776468655993663930.1130.0529.981095103150298476686866648470553029.9329.85109182100.21Rain3072706768656393867829.9129.8729.8410621051300.1Rain V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 3Page 12 of 14 2012 Temp. (°F)Dew Point (°F)Humidity (%)Sea Level Press. (in)Visibility (mi)Wind (mph)Precip. (in)EventsOcthighavglowhighavglowhighavglowhighavglowhighavglowhighavghighsum1767267726865100918229.8529.829.75730126150.23Fog , Rain2878174757165100765129.9629.8229.741082156240.03Rain381767171686493765830.230.0829.9710101082180.01Rain482746568666393745430.2630.2130.16108182130.41Fog , Rain581726265625993714930.1830.1130.03108481120Fog688746065605797673630.0329.9529.871083133200782716065615193745530.129.9929.921096155200860575354504786746230.1630.1230.061091167220.44Rain958534749484693837230.1830.1430.1110949413T1077614456504293684330.1430.0930.02101062062601174614752474293663830.330.2230.14101010172240Fog1281665056524789633630.2730.2130.151010992120Fog1375645355494689654130.4230.3430.271010101452001481665066564890704930.2930.1830.04101010143150.011581726367604493694530.0429.8829.761010821726TRain1674604549443993612929.9929.9229.881010101421701775624950474493643530.0129.9429.910106133170Fog1882685363564893684229.8929.8329.7710109143220.061979644965473093561829.8429.7929.741093176230.23Rain2077624750434083562829.9529.8529.811010101652102174604550443789613330.1530.0829.961010101321702279624452464193623130.2530.1830.1310101071802381644653474393612830.2230.1530.1101097110024836649605246100663130.2130.1530.08107071100Fog2584685262575093674030.1230.0830.03101061542102679685661575293684230.0529.9729.8710106177250Fog2775706560575084675029.8529.7329.651010920102802877665552483869513329.6929.6529.591010102282902964564739332861463029.6929.6429.5610101026153703061554832292754422929.7129.5829.5210101024153203168544029241555351529.8229.7529.711010102810310 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 3Page 13 of 14 2012 Temp. (°F)Dew Point (°F)Humidity (%)Sea Level Press. (in)Visibility (mi)Wind (mph)Precip. (in)EventsNovhighavglowhighavglowhighavglowhighavglowhighavglowhighavghighsum167503230241875461629.9429.8629.81101010248300277573643332670472329.9729.9129.83101010258310377583944373185521930.1230.0429.99101099112047965505952448966423029.9529.881093144210.19Rain , Thunderstorm566574748393277563430.0830.0229.96101010135160654474039343071584430.063029.95101010168230753463839353292715029.9829.9329.871095135150867513543332592562030.1630.0829.991084154220972523138312689541930.2930.2330.1610109811001076553439332889541830.3830.3230.261097921301175563756453485654430.4630.430.3610961321501276655361585293776030.3730.2730.16108222625TRain1366595261504193796430.3530.2530.16109515721TRain1454504541353276614530.4230.3530.291010101792201550464241393489715230.3230.2730.241072176251.36Rain , Thunderstorm1662514041383686644230.3430.2830.24101091251701759493936302279522430.4330.3830.34101091792501862564948413483624130.3930.3330.27101010171023T1969615249464383664930.2830.2230.171010101672302065544246433889694830.1830.1230.06101010931402167523644373392623230.1730.1230.08101061221602267503238322892582430.2730.230.16101091332102371523247372889592930.1730.0629.94101061852402461473238271276481930.1330.0329.951010101662002560442728241985532130.2230.1430.07101091321602672513033272185501530.2230.1630.121010971802757483850412789643830.230.1630.1108592120.07Rain2859473448403292684330.3930.330.1910841231602960452936302692612930.4830.4130.371085811003066483044362792643630.4230.3630.310966180 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 3Page 14 of 14 2012 Temp. (°F)Dew Point (°F)Humidity (%)Sea Level Press. (in)Visibility (mi)Wind (mph)Precip. (in)EventsDechighavglowhighavglowhighavglowhighavglowhighavglowhighavghighsum170574349454292684430.430.3430.32109691140274594455494293714930.3930.3230.2610961211303766247585045100693830.3430.2930.241060122150Fog475624858524589684630.3530.2730.2210106133220576645157545093704630.2130.1630.0910107176230661565050433677645030.2330.1830.1510101016920T7575450524436100775430.1630.0830.0110809413TFog8726149545148100775330.0930.0530106092150Fog9716252615750100877330.1330.0729.981060102170Fog10746556605755100775329.9729.8529.75108118623TRain11666054575041100744830.0929.929.751080104120Fog1256494243393592715030.3130.1930.091082168220.66Rain1355473839383589725530.3630.3130.21082216290.22Rain1461473239332989633630.430.3130.231010761100Fog1561483547383392653730.2630.1830.11097821201664585258544693857730.073029.8710727290.03Rain1761595658565493898429.9129.8329.731082205230.44Rain1864524056463393653629.9929.8329.731010102393001972533443373186582930.1230.0529.991010101542002072553861463192714930.129.8829.62101023911510.19Rain2151464028231853423129.9729.8529.771010103521470225945312616764391330.1630.129.981010102182602360432630242075492330.2130.1330.071010101251502454474049393093674130.0729.9929.911093163230.43Rain2554525051494896908330.083029.931082104130.16Rain2667544061493093704629.9229.6729.5110723216440.69Rain , Thunderstorm2757463535312985623830.0629.9629.82101092172602852423237322989684630.1730.0829.9410107831002956483945392896745130.0729.8629.7410822812360.69Rain3051402827241978532830.4330.3230.09101071542603159432642292385572830.4330.3230.171092143220 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSISAttachment 4Page 1 of 3Average Summertime Environmental Parameters Date Temperature Humidity (%) Pressure F C in HG mbar 6/1/2012 79 26.11111111 73 29.82 1009.817 6/2/2012 73 22.77777778 61 29.85 1010.833 6/3/2012 73 22.77777778 56 29.92 1013.203 6/4/2012 76 24.44444444 74 29.77 1008.124 6/5/2012 69 20.55555556 79 29.81 1009.478 6/6/2012 71 21.66666667 69 29.9 1012.526 6/7/2012 72 22.22222222 69 30.02 1016.59 6/8/2012 73 22.77777778 65 30.03 1016.928 6/9/2012 76 24.44444444 60 30.06 1017.944 6/10/2012 75 23.88888889 81 30.1 1019.299 6/11/2012 76 24.44444444 86 30.08 1018.622 6/12/2012 78 25.55555556 79 29.96 1014.558 6/13/2012 81 27.22222222 70 29.92 1013.203 6/14/2012 79 26.11111111 62 30.05 1017.606 6/15/2012 76 24.44444444 55 30.14 1020.654 6/16/2012 73 22.77777778 56 30.18 1022.008 6/17/2012 72 22.22222222 65 30.1 1019.299 6/18/2012 76 24.44444444 65 30.07 1018.283 6/19/2012 78 25.55555556 65 30.14 1020.654 6/20/2012 80 26.66666667 64 30.13 1020.315 6/21/2012 82 27.77777778 63 30.02 1016.59 6/22/2012 82 27.77777778 59 29.91 1012.865 6/23/2012 83 28.33333333 63 29.93 1013.542 6/24/2012 82 27.77777778 69 29.95 1014.219 6/25/2012 81 27.22222222 70 29.81 1009.478 6/26/2012 78 25.55555556 61 29.79 1008.801 6/27/2012 76 24.44444444 48 29.94 1013.881 6/28/2012 81 27.22222222 48 29.98 1015.235 6/29/2012 90 32.22222222 45 29.85 1010.833 6/30/2012 92 33.33333333 52 29.84 1010.494 7/1/2012 90 32.22222222 62 29.93 1013.542 7/2/2012 84 28.88888889 65 30.02 1016.59 7/3/2012 87 30.55555556 59 29.98 1015.235 7/4/2012 84 28.88888889 65 29.98 1015.235 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 4Page 2of 3 Date Temperature Humidity (%) Pressure F C in HG mbar 7/5/2012 89 31.66666667 56 29.93 1013.542 7/6/2012 86 30 59 29.95 1014.219 7/7/2012 88 31.11111111 58 29.99 1015.574 7/8/2012 91 32.77777778 52 29.95 1014.219 7/9/2012 89 31.66666667 46 29.9 1012.526 7/10/2012 83 28.33333333 75 29.96 1014.558 7/11/2012 82 27.77777778 71 30.04 1017.267 7/12/2012 81 27.22222222 73 30.09 1018.96 7/13/2012 81 27.22222222 87 30.14 1020.654 7/14/2012 83 28.33333333 75 30.16 1021.331 7/15/2012 83 28.33333333 68 30.14 1020.654 7/16/2012 83 28.33333333 71 30.03 1016.928 7/17/2012 83 28.33333333 68 29.96 1014.558 7/18/2012 85 29.44444444 67 29.98 1015.235 7/19/2012 84 28.88888889 67 30.01 1016.251 7/20/2012 85 29.44444444 67 29.96 1014.558 7/21/2012 83 28.33333333 72 30.03 1016.928 7/22/2012 86 30 65 30.13 1020.315 7/23/2012 86 30 69 30.13 1020.315 7/24/2012 89 31.66666667 62 29.97 1014.897 7/25/2012 85 29.44444444 69 29.93 1013.542 7/26/2012 90 32.22222222 60 29.88 1011.849 7/27/2012 89 31.66666667 56 29.9 1012.526 7/28/2012 86 30 68 29.96 1014.558 7/29/2012 85 29.44444444 68 29.95 1014.219 7/30/2012 84 28.88888889 67 29.95 1014.219 7/31/2012 79 26.11111111 75 29.94 1013.881 8/1/2012 84 28.88888889 68 29.89 1012.188 8/2/2012 86 30 66 29.89 1012.188 8/3/2012 83 28.33333333 63 29.98 1015.235 8/4/2012 86 30 69 30.11 1019.638 8/5/2012 84 28.88888889 68 30.16 1021.331 8/6/2012 85 29.44444444 72 30.09 1018.96 8/7/2012 82 27.77777778 75 30.01 1016.251 8/8/2012 82 27.77777778 73 29.99 1015.574 8/9/2012 82 27.77777778 71 29.94 1013.881 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 4Page 3of 3 Date Temperature Humidity (%) Pressure F C in HG mbar 8/10/2012 79 26.11111111 77 29.87 1011.51 8/11/2012 76 24.44444444 84 29.91 1012.865 8/12/2012 82 27.77777778 64 29.97 1014.897 8/13/2012 79 26.11111111 62 29.99 1015.574 8/14/2012 79 26.11111111 69 29.94 1013.881 8/15/2012 82 27.77777778 69 29.93 1013.542 8/16/2012 81 27.22222222 61 29.99 1015.574 8/17/2012 82 27.77777778 67 29.9 1012.526 8/18/2012 81 27.22222222 70 29.87 1011.51 8/19/2012 79 26.11111111 79 29.86 1011.172 8/20/2012 78 25.55555556 75 29.89 1012.188 8/21/2012 79 26.11111111 74 29.99 1015.574 8/22/2012 79 26.11111111 72 30.05 1017.606 8/23/2012 79 26.11111111 72 30.09 1018.96 8/24/2012 78 25.55555556 64 30.09 1018.96 8/25/2012 76 24.44444444 64 30.11 1019.638 8/26/2012 77 25 67 30.11 1019.638 8/27/2012 79 26.11111111 70 30.06 1017.944 8/28/2012 80 26.66666667 82 29.99 1015.574 8/29/2012 82 27.77777778 81 29.97 1014.897 8/30/2012 79 26.11111111 82 30.08 1018.622 8/31/2012 83 28.33333333 73 30.17 1021.669 81.29348 27.3852657 67.14130435 29.98728 1015.482 V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 5Page 1 of 1Siren 5 Reference BaselineProject:V.C. SUMMERDate:3/14/2013 Time: 9:39 A.M.Test Technician:Equipment Used:BRUEL & KJAER TYPE 2236 AND SOUNDTEK ST-107S Calibration Number(s):N/A -Calibration before testCalibration Date:03/03/2013 AND 03/08/2013 by manufacturer or independent lab.

Location Name:Siren 5 Reference Baseline 2001-130 dB(C)

Loc. Coordinates:N34.3895 W81.3775Loc. Elevation:

439Weather:Description:See belowTemperature:43 degreesHumidity:40% BP: 30.09Wind Speed:CalmWind Direction:N/ASPL(dBA)(Ambient)LEQSELMAXSPL(dBC)

(Ambient)LEQSELMAX43.8N/A48.945N/A48.3SPL(dBA)

(Siren)LEQSELMAXSPL(dBC)

(Siren)LEQSELMAX65.2N/A68.463.2N/A73.5Notes: Readings include at leasta two-minute sampling of data.Site Comments:Sirens sounded: 5 Weather: Clear, sunny day, no clouds.

This location is slightly uphill on a gravel road. Testers were in the center of the road adjacent to the drive that exists to the south of the BroadRiver Water Fowl area. There are trees to the north approximately 25' away. The tree height averages about 75'. To the south lies a small clearing then trees at the same height, approximately 45' away in all directions. The test site is on a slight uphill slope and the tree line along the road is similar all the way in both directions.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 6Page 1 of 1Siren 40 Reference BaselineProject:V.C. SUMMERDate:3/14/2013 time 10:32 A.M.Test Technician:

Equipment Used:BRUEL & KJAER TYPE2236 AND SOUNDTEK ST-107S Calibration Number(s):Calibration before test -BK 93.2 ST 94.0Calibration Date: 03/03/2013 AND 03/08/2013 by manufacturer or independent lab.

Location Name:Siren 40 Reference Baseline 2001-SRNB128 dB(C)

Loc.

Coordinates:N34.3555 W081.3648Loc. Elevation:

296Weather:Description:See belowTemperature:44 degreesHumidity:37% BP: 30.15Wind Speed:4 mphWind Direction:WestSPL(dBA)

(Ambient)LEQSELMAXSPL(dBC)

(Ambient)LEQSELMAX42.4N/A53.50.4N/A59.5SPL(dBA)

(Siren)LEQSELMAXSPL(dBC)

(Siren)LEQSELMAX42.9N/A52.358.5N/A68.6Notes: Readings include at least a two-minute sampling of data.Site Comments:

Sirens sounded: 40 Weather: Clear, sunny day, no clouds.

This location is slightly uphill on a gravel road. The test site isin the center of the road. The trees are approximately 15' away on either side of the road. It is a fairly thin stand of pines. The trees are averaging about 60' tall.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSISAttachment 7Page 1 of 1 GROUP TESTLOCATION AREA TESTED INSIDE EPZ AREA TESTED IN EXPANDED EPZ POP DENS <2,000/SQMIMODEL SOUND LEVEL SOUND LEVEL SIREN (MAXdBC SPL)(MAXdBC SPL)AUDIBILITYAMBIENT SIREN (HIGH, MED, LOW, NONE)13YES/YES2001SRNB62.659LOW24YES/YES2001SRNB7974.9MED35YES/YES2001SRNB64.872.4MED46YES/YES2001SRNB7271.6LOW57YES/YES2001SRNB67.261.9LOW68YES/YES2001SRNB61.666.1MED79YES/YES2001SRNB73.883.8HIGH810YES/YES2001SRNB61.374.7HIGH911YES/YES2001SRNB70.878MED1012YES/YES2001SRNB50.764.2MED1113YES/YES2001SRNB67.376MED 12 9 14YES/YES2001SRNB73.477NONE 13 10 15/YESYES2001SRNB58.556.7NONE 14 11 16/YESYES2001SRNB77.181.3NONE

9New Site #9 to provide coverage to eliminate the coverage deficiency noted.

10New Site #108 to provide coverage to eliminate the coveragedeficiency noted.

11New Site #109 to provide coverage to eliminate the coverage deficiency noted.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSISAttachment 8Page 1 of 14Acoustic Survey FormProject:V.C. SUMMERDate:3/14/2013Time: 11:30 a.m.Test Technician:Equipment Used:BRUEL & KJAER TYPE 2236 AND SOUNDTEK ST-107SCalibration Number(s):Calibration before test -BK 93 ST 94Calibration Date:03/03/2013 AND 03/08/2013by manufacturer or independent lab.Location Name:Group 1 Test Native DriveLoc. Coordinates:Location changed N34.37773 W081.36002Loc. Elevation:

493WeatherDescription:See belowTemperature:50 degreesHumidity:30% BP 30.15Wind Speed:

2 mphWind Direction:WestSPL(dBA)

(Ambient)LEQSELMAXSPL(dBC)(Ambient)LEQSELMAX36N/A54.246.5N/A62.6SPL(dBA)(Siren)LEQSELMAXSPL(dBC)

(Siren)LEQSELMAX43.9N/A51.150.9N/A59Notes: Readingsinclude at least a two-minute sampling of data.Site Comments:Sirens sounded: 40, 25, 21, 5, 6, 8, 10Weather: Sunny day, no clouds.We set up in the center of a gravel road. The road was bordered on each side with trees averaging 40-60' in height. We changed the GPS on this site to stay out on the main road as opposed to a little two track out in the field.Observation: Siren Audibility -Low V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 8Page 2 of 14Acoustic Survey FormProject:V.C. SUMMERDate:3/14/2013Time: 12:35 p.m.Test Technician:Equipment Used:BRUEL & KJAER TYPE 2236 AND SOUNDTEK ST-107SCalibration Number(s):Calibration before test -BK 92.8 ST 93.8Calibration Date:03/03/2013 AND 03/08/2013by manufacturer or independent lab.Location Name:Group 2 TestLoc. Coordinates:N34.393484 W081.245504Loc. Elevation:

287WeatherDescription:See belowTemperature:52 degreesHumidity:25% BP 30.03Wind Speed:2mphWind Direction:SouthSPL(dBA)

(Ambient)LEQSELMAXSPL(dBC)

(Ambient)LEQSELMAX60.4N/A61.362.5N/A79.0SPL(dBA)

(Siren)LEQSELMAXSPL(dBC)(Siren)LEQSELMAX49N/A54.360.2N/A74.9Notes: Readingsinclude at least a two-minute sampling of data.Site Comments:Sirens sounded: 15, 16, 18, 61, 41, 13 Weather: Sunny day, no clouds.We set up on the north side of a two lane paved road. There are no significant trees blocking this site. We are open all the way around for approximately 100'. The closest trees after that are about 70' tall and there is no foliage on the trees at this point.Observation: Siren Audibility -Medium; Note: Two cars that went by during the testskewed the ambient test results.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 8Page 3 of 14Acoustic Survey FormProject:V.C. SUMMERDate:3/14/2013Time: 1:30 p.m.Test Technician:Equipment Used:BRUEL & KJAER TYPE 2236 AND SOUNDTEK ST-107SCalibration Number(s):Calibration before test -BK 92.9 ST 93.5Calibration Date:03/03/2013 AND 03/08/2013by manufacturer or independent lab.Location Name:Group Test 3Loc. Coordinates:N34.382619 W081.26144Loc. Elevation:

411WeatherDescription:See belowTemperature:56 degreesHumidity:25% BP 30.03Wind Speed:5mphWind Direction:NorthwestSPL(dBA)

(Ambient)LEQSELMAXSPL(dBC)

(Ambient)LEQSELMAX41.0N/A54.551.6N/A64.80SPL(dBA)

(Siren)LEQSELMAXSPL(dBC)(Siren)LEQSELMAX45.0N/A45.561.2N/A72.4Notes: Readingsinclude at least a two-minute sampling of data.Site Comments:Sirens sounded: 18, 61, 41, 13, 16, 15 Weather: Sunny day, no clouds.This is a wide open sitein the Y between three paved roads. We are in a grassy area of approximately 1200 square feet where Liston Road,S-20-225,and S-20-205 meet. The closest trees are approximately 60' away in all directionsand are not dense. To the south, the trees are only about 40' tall and to the north, they are approaching 65' tall.Observation: Siren Audibility-Medium; Note: While this site technically shows a failure due to the fact that the siren sound is not 10dB above ambient, the higher ambient noise level was due to natural (not manmade) background noise, which we experienced in several other locations during field testing.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 8Page 4 of 14Acoustic Survey FormProject:V.C. SUMMERDate:3/14/2013Time: 2:15 p.m.Test Technician:Equipment Used:BRUEL & KJAER TYPE 2236 AND SOUNDTEK ST-107SCalibration Number(s):Calibration before test -BK 92.5 ST 93.1Calibration Date:03/03/2013 AND 03/08/2013by manufacturer or independent lab.Location Name:Group Test 4Loc. Coordinates:N34.380641 W081.192235Loc. Elevation:

355WeatherDescription:See belowTemperature:54 degreesHumidity:26% BP 30.06Wind Speed:7mphWind Direction:EastSPL(dBA)

(Ambient)LEQSELMAXSPL(dBC)

(Ambient)LEQSELMAX42.0N/A56.761.1N/A72.00SPL(dBA)(Siren)LEQSELMAXSPL(dBC)(Siren)LEQSELMAX46.5N/A50.260.6N/A71.6Notes: Readingsinclude at least a two-minute sampling of data.Site Comments:Sirens sounded:17, 18, 57, 58Weather: Sunny day, no clouds.Intersection at Old Airport Road. We are approximately 50' east of a paved road on the north side of a gravel road. The closest trees are approximately 30' away. Trees west of the site are approximately 100' away. There are no real dense trees in the area and the closest trees south of our location have height of approximately 40'.Observation: Siren Audibility -Very low; Note: Ambient background noise was high in this area.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 8Page 5 of 14Acoustic Survey FormProject:V.C. SUMMERDate:3/14/2013Time: 3:00 p.m.Test Technician:Equipment Used:BRUEL & KJAER TYPE 2236 AND SOUNDTEK ST-107SCalibration Number(s):Calibration before test -BK 92.6 ST 92.8Calibration Date:03/03/2013 AND 03/08/2013by manufacturer or independent lab.Location Name:Group Test 5Loc. Coordinates:N34.341021 W81.149513Loc. Elevation:

474WeatherDescription:See belowTemperature:57 degreesHumidity:24% BP 29.89Wind Speed:4mphWind Direction:WestSPL(dBA)

(Ambient)LEQSELMAXSPL(dBC)

(Ambient)LEQSELMAX39.50N/A55.353.2N/A67.2SPL(dBA)(Siren)LEQSELMAXSPL(dBC)(Siren)LEQSELMAX48.9N/A53.754.3N/A61.9Notes: Readingsinclude at least a two-minute sampling of data.Site Comments:Sirens sounded: 58, 57, 59, 63Weather: Sunny day, no clouds.This site is located on Reservoir Road adjacent to the driveway at1093 Mill Creek Shores at the top of the hill on Reservoir Road, whichis gravel. We tested 100' away from trees, which average 40' in height. The terrain drops to the west down about 100'.Observation: Siren Audibility -Very low; Note: Ambient background noise was high in this area.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 8Page 6 of 14Acoustic Survey FormProject:V.C. SUMMERDate:3/14/2013Time: 4:00 p.m.Test Technician:Equipment Used:BRUEL & KJAER TYPE 2236 AND SOUNDTEK ST-107SCalibration Number(s):Calibration before test -BK 92.5 ST 92.9Calibration Date:03/03/2013 AND 03/08/2013by manufacturer or independent lab.Location Name:Group Test 6Loc. Coordinates:Location changed N34.34445 W-81.27484Loc. Elevation:

378WeatherDescription:See belowTemperature:63 degreesHumidity:20% BP 29.93Wind Speed:2 mphWind Direction:South/SouthwestSPL(dBA)

(Ambient)LEQSELMAXSPL(dBC)

(Ambient)LEQSELMAX35.6N/A51.549.7N/A61.6SPL(dBA)(Siren)LEQSELMAXSPL(dBC)(Siren)LEQSELMAX55.9N/A58.958.1N/A66.1Notes: Readingsinclude at least a two-minute sampling of data.Site Comments:Sirens sounded: 47, 46, 45, 54, 55Weather: Sunny day, no clouds.We set up on Brooks Drive. The closest address is 497 Brooks Drive in Blair, South Carolina. This is a real rugged two track trail. There are trees around us within 10' of the center line of the road. Most of these trees are averaging in height of about 50'. Not real dense forest.Observation: Siren Audibility -Medium; Note: Gun shots in background during ambient test resulted in a high ambient max reading for the SPLDC ambient.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 8Page 7 of 14Acoustic Survey FormProject:V.C. SUMMERDate:3/14/2013Time: 4:56 p.m.Test Technician:Equipment Used:BRUEL & KJAER TYPE 2236 AND SOUNDTEK ST-107SCalibration Number(s):Calibration before test -BK 92.5 ST 93.0Calibration Date:03/03/2013 AND 03/08/2013by manufacturer or independent lab.Location Name:Group Test 7Loc. Coordinates:N34.276318 W81.280414Loc. Elevation:

452WeatherDescription:See belowTemperature:1 degreesHumidity:23% BP 29.92Wind Speed:5mphWind Direction:West/NorthwestSPL(dBA)

(Ambient)LEQSELMAXSPL(dBC)

(Ambient)LEQSELMAX40.9N/A52.458.6N/A73.8SPL(dBA)(Siren)LEQSELMAXSPL(dBC)(Siren)LEQSELMAX72.4N/A77.573.3N/A83.8Notes: Readingsinclude at least a two-minute sampling of data.Site Comments:Sirens sounded: 43, 89, 49, 50, 51Weather: The sky is partially overcast.We set up in the middle of an asphalt street. There are no trees around of any consequence for several hundred feet in all directions of the test point with open field facing to the south. In addition, St. Barnabus Church Road that runs through this site points almost immediately down around a couple of curves towards siren site 43. Site 13 is directly to the west.Observation: Siren Audibility -High V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 8Page 8of 14Acoustic Survey FormProject:V.C. SUMMERDate:3/15/2013Time: 9:38 a.m.Test Technician:Equipment Used:BRUEL & KJAER TYPE 2236 AND SOUNDTEK ST-107SCalibration Number(s):Calibration before test -BK 93.1 ST 93.1Calibration Date:03/03/2013 AND 03/08/2013by manufacturer or independent lab.Location Name:Group Test 8Loc. Coordinates:New location: N34.26567 W81.16158Loc. Elevation:

425WeatherDescription:See belowTemperature:45 degreesHumidity:46% BP 29.95Wind Speed:1-2 mphWind Direction:WestSPL(dBA)

(Ambient)LEQSELMAXSPL(dBC)

(Ambient)LEQSELMAX39.8N/A54.349.6N/A61.3SPL(dBA)(Siren)LEQSELMAXSPL(dBC)(Siren)LEQSELMAX65.6N/A66.865.6N/A74.7Notes: Readingsinclude at least a two-minute sampling of data.Site Comments:Sirens sounded: 68, 69, 102, 103Weather: Clear, sunny day, no clouds.We set up in the center of a paved road (there are new coordinates). It is on Mann Road. The closest address is 1245 Mann Road. The closest trees of any consequence are a quarter of a mile away. We do have some short tree growth (40' or less), not dense, starting about 30' away from the test site.Observation:Siren Audibility -High; Note: Logging operation approximately 3/8 of a mile away added 10 dB to ambient test.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 8Page 9 of 14Acoustic Survey FormProject:V.C. SUMMERDate:4/18/2013Time: 12:47PMTest Technician:Equipment Used:BRUEL & KJAER TYPE 2236 AND SOUNDTEK ST-107SCalibration Number(s):Calibration before test -BK 91.9 ST 92Calibration Date:03/03/2013AND 03/08/2013by manufacturer/independent lab.Location Name:Group Test #9(Retest) 2511 Hughey Ferry RoadLoc. Coordinates:N34.30209 W-81.40774Loc. Elevation:

406WeatherDescription:See belowTemperature:82degreesHumidity:54% BP 30.30Wind Speed:8mph 4-10 mphWind Direction:SE/SSPL(dBA)

(Ambient)LEQSELMAXSPL(dBC)

(Ambient)LEQSELMAX38.6N/A51.860.2N/A70.8SPL(dBA)

(Siren)LEQSELMAXSPL(dBC)(Siren)LEQSELMAX51.4N/A63.667.0N/A78.00Notes: Readingsinclude at least a two-minute sampling of data.Site Comments:Sirens sounded: 27, 31, 32, 33Weather: Partly sunny, 50% sun, 50% clouds This retest is neartest point 11 but closer to the main road; the original test was closer to a farmer's field.We set up on gravel about 6' off the edge of a 20'wide paved road. Most of the area is open; about 50' away is a sparsely wooded area with trees averaging 40-50' in height.

The rest of the area, for about 0.25miles, is clear of any vegetation taller than 25'. The winds averaged between 4-10 mph during the actual siren test,with a couple of wind gusts up to 10 mph. There was also background noise from a tractor approximately 0.25milesaway during the test.Observation: Siren Audibility -Medium; Note: There is a lot of background noise from birds at this site, which raised the ambient max level.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 8Page 10 of 14Acoustic Survey FormProject:V.C. SUMMERDate:4/17/2013Time: 2:08 p.m.Test Technician:Equipment Used:BRUEL & KJAER TYPE 2236 AND SOUNDTEK ST-107SCalibration Number(s):Calibration before test BK 93.1 ST 91.6Calibration Date:03/03/2013 AND 03/08/2013by manufacturer or independent lab.Location Name:Group Test 10S20-99Loc. Coordinates:N34.43065 W81.37376Loc. Elevation:

349WeatherDescription:See belowTemperature:82 degreesHumidity: 52%Wind Speed:2 mphWind Direction:SouthSPL(dBA)

(Ambient)LEQSELMAXSPL(dBC)

(Ambient)LEQSELMAX38.0N/A46.243.4N/A50.7SPL(dBA)(Siren)LEQSELMAXSPL(dBC)(Siren)LEQSELMAX45.6N/A58.349.5N/A64.2Notes: Readingsinclude at least a two-minute sampling of data.Site Comments:Sirens sounded: 4, 7, 6Weather: Clear, sunny day, patchy clouds.We set up on the side of a paved road about 4' from the edge of the pavement. There are some large trees however, they are sparse, approximately 80' -100'tall. There is foliage on the trees that is at about 40% of growth.Observation: Siren Audibility -Medium V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 8Page 11 of 14Acoustic Survey FormProject:V.C. SUMMERDate:4/17/2013Time: 2:30p.m.Test Technician:Equipment Used:BRUEL & KJAER TYPE 2236 AND SOUNDTEK ST-107SCalibration Number(s):Calibration before test BK 91.8ST 90.3Calibration Date:03/03/2013 AND 03/08/2013by manufacturer or independent lab.Location Name:Group Test 11Cooper Holmes RoadLoc. Coordinates:N34.43307W81.31365Loc. Elevation:

648WeatherDescription:See belowTemperature:88degreesHumidity:42%BP 30.30Wind Speed:2 mphWind Direction:SouthSPL(dBA)

(Ambient)LEQSELMAXSPL(dBC)

(Ambient)LEQSELMAX34.3N/A51.151.5N/A67.3SPL(dBA)

(Siren)LEQSELMAXSPL(dBC)(Siren)LEQSELMAX48.2N/A50.363.3N/A76.0Notes: Readingsinclude at least a two-minute sampling of data.Site Comments:Sirens sounded: 11, 12, 106 Weather: Clear, sunny day, with fewclouds.We set up in a clearing about 15 feet off the center of a gravel road. The area is not heavily wooded. It is comprised mostly of pine trees with some small undergrowth; foliage is at 40% growth.Observation: Siren Audibility -Medium; Note: There is a lot of background noise at this site.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 8Page 12of 14Acoustic Survey FormProject:V.C. SUMMERDate:4/17/2013Time 11:10 a.m.Test Technician:Equipment Used:BRUEL & KJAER TYPE 2236 AND SOUNDTEK ST-107SCalibration Number(s):Calibration before test -BK 92.2 ST 90.8Calibration Date:03/03/2013 AND 03/08/2013by manufacturer or independent lab.Location Name:Group Test 12S36/99 Silver Bullet Road Loc. Coordinates:N34.22036 W81.49699Loc. Elevation:

498WeatherDescription:See belowTemperature:74 degreesHumidity:63% BP 30.27Wind Speed:3 mphWind Direction:N/WSPL(dBA)

(Ambient)LEQSELMAXSPL(dBC)

(Ambient)LEQSELMAX51.3N/A55.168.6N/A73.4SPL(dBA)(Siren)LEQSELMAXSPL(dBC)(Siren)LEQSELMAX55.0N/A55.769.8N/A77.0Notes: Readingsinclude at least a two-minute sampling of data.Site Comments:Sirens sounded: 71, 72Weather: Clear, sunny day, no clouds in the sky.We are set up about 30' off the edge of a paved road at the corner of S36/99 and Silver Bullet Road. There are some large trees, approximately 40' tall in all directions. They are some 60' -100' tall, however, the woods are sparsely populated,and there are some open fields past the tree line.Observation: Siren Audibility -None; Note: We could not hearthe two sirens sounded in this location over ambient noise;77.0 dBCmax was ambient noise only.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 8Page 13of 14Acoustic Survey FormProject:V.C. SUMMERDate:4/18/2013Time: 2:20 p.m.Test Technician:Equipment Used:BRUEL & KJAER TYPE 2236 AND SOUNDTEK ST-107SCalibration Number(s):Calibration before test -BK 92.0 ST 91.9Calibration Date:03/03/2013 AND 03/08/2013by manufacturer or independent lab.Location Name:Group Test 13621 Sand Bar RoadLoc. Coordinates:N34.14372 W81.36107Loc. Elevation:

370WeatherDescription:See belowTemperature:75 degreesHumidity:78% BP 30.30Wind Speed:2 mphWind Direction:E/NESPL(dBA)

(Ambient)LEQSELMAXSPL(dBC)

(Ambient)LEQSELMAX44.1N/A59.954.1N/A58.5SPL(dBA)

(Siren)LEQSELMAXSPL(dBC)(Siren)LEQSELMAX43.1N/A51.353.6N/A56.7Notes: Readingsinclude at least a two-minute sampling of data.Site Comments:Sirens sounded:95, 104Weather: Partly sunny This site is within the new EPZ, close to 621 Sand Bar Road. We tested in a little gravel area off about one foot off the edge of a paved roadandabout 100feetaway from backwater. This area is somewhat open. The closest trees to the test point are 50 feet away and average 50-80 feet in height; foliage is not very densewith 80% growth.Observation: Siren Audibility -Very low to none; Note: No vehicles passed the site during the ambient test. We performed anambient test, but significant rain dropped the temperature 10 degreesand raised the humidity 20%before the siren test was completed. We retested to ensureaccurate test results based on the weather changes.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISAttachment 8Page 14of 14Acoustic Survey FormProject:V.C. SUMMERDate:4/18/20132:31 p.m.Test Technician:Equipment Used:BRUEL & KJAER TYPE 2236 AND SOUNDTEK ST-107SCalibration Number(s):Calibration before test -BK 91.9 ST 91.9Calibration Date:03/03/2013 AND 03/08/2013by manufacturer or independent lab.Location Name:Group Test 14Twin Pines Dr./Westwood Dr.Loc. Coordinates:N34.15581 W81.39981Loc. Elevation:

442WeatherDescription:See belowTemperature:78 degreesHumidity:69% BP 30.24Wind Speed:6 mph -7 mphWind Direction:S/SESPL(dBA)

(Ambient)LEQSELMAXSPL(dBC)

(Ambient)LEQSELMAX41.3N/A49.365.3N/A77.1SPL(dBA)

(Siren)LEQSELMAXSPL(dBC)(Siren)LEQSELMAX47.1N/A51.767.9N/A81.3Notes: Readingsinclude at least a two-minute sampling of data.Site Comments:Sirens sounded:79, 80 Weather: Partly sunnyThis is on the corner of Westwoods Drive and Twin Pine Drive. We set up on a small paved area approximately 20' off the edge of WestwoodsDrive. This area is mostly open fields with afew residential trees averaging30-70feetin height. Observation: Siren Audibility -None; Note: Ambient noise in this location is extremelyhigh; the 81.3 max dBC ambient noise level listed for the siren actually represents ambient noise for this area. Both max measurements are artificially high due to excessive background noise from barking dogs, firing guns, and passing cars.

V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSISMAP 1Page 1 of 1VCSNS 10-Mile Emergency Planning Zone V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISMAP 2Page 1 of 1Existing Sirens V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEMACOUSTICAL ANALYSISMAP 3Page 1 of 1Proposed Sirens V.C. SUMMER NUCLEAR GENERATING STATIONEARLY WARNING SIREN SYSTEM ACOUSTICAL ANALYSISThis page is intentionally left blank.