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Silverhawk Generating Station

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Facility #1 : Silverhawk Generating Station


Basic Facility Info facility_Basic_Facility_Info help link help link  
Facility ID100000184864
Deregistered (Yes/No)No
Facility NameSilverhawk Generating Station
Street Address Line 115111 Apex Power Parkway
CityNorth Las Vegas
StateNV
Zip Code89124
CountyClark County
113th Congressional DistrictNV04: Nevada 4
Owner or Operator NameNV Energy
Parent CompanyNV Energy
Latitude36.410694
Longitude-114.960750
Number of RMP Submissions2

Most Recent Submission Info facility_Most_Recent_Submission_Info help link help link  
RMP ID54760
Submission Typerevised submission for facility
Submission Date06/18/2009
Reason For Submission5-year update (40 CFR 68.190(b)(1))
Process Toxic Amount Total (lbs)190,740
Process Flammable Amount Total (lbs)0
Process Amount Total (lbs)190,740
Number of Potential Offsite Consequence Processes0
Potential Offsite Consequence Toxic Amount Total (lbs)0
Potential Offsite Consequence Flammable Amount Total (lbs)0
Potential Offsite Consequence Amount Total (lbs)0
All Process NAICS221112
Exec Summary Submission Date06/18/2009

Executive Summary facility_Executive_Summary help link help link (Facility #1 : Silverhawk Generating Station, executive summary: all)

Executive Summary
Nevada Power Company d/b/a NV Energy owns and operates the Silverhawk Generating Station (Silverhawk), a nominal 520-megawatt power plant located in North Las Vegas, Nevada. The facility uses aqueous ammonia solution (29 percent by weight) in the selective catalytic reduction process for controlling the nitrogen oxides emissions.

The scope of this RMP is based on the 40 CFR Part 68 and other published guidelines by U.S.EPA. The aqueous ammonia storage and handling system is the only process at Silverhawk that triggers the RMP requirements. This process was determined to be covered by federal RMP Program Level 1 requirements.

The aqueous ammonia storage and handling system at the facility is comprised of a single storage tank, pumps, and piping which terminate at the vaporizer where the aqueous ammonia is atomized to concentrations below 20 percent. The tank is 30,000 gallons in volume and is equipped with pressure relief valves, temperature, pressure, and level indicators. The facility has an administrative storage limit of 85% of the maximum storage capacity. The tank is also surrounded by a dike for containing the entire contents of the storage tank in case of equipment failure.

Offsite Consequence Analysis Results

The offsite consequence analysis was conducted using the EPA's RMP Guidance for Offsite Consequence Analysis (March 2009). The worst-case release scenario was developed assuming that the entire contents of the aqueous ammonia storage tank are released through a failed tank or pipe into the secondary containment dike that is large enough to contain the entire volume. Under worst-case meteorological conditions, 1.5 m/s wind speed and a stable (Pasquill F) atmospheric stability class, the ammonia cloud could travel 0.2 miles before dispersing sufficiently to no longer pose a health hazard to the public.

Summary of the Five-Year Accident History

There have been no accidental releases from the aqueous ammonia storage and handling system at the facili
ty in the past five years that have resulted in deaths, injuries, or significant property damage on site, or known offsite deaths, injuries, evacuations, sheltering in place, property damage, or environmental damage.

Summary of the Emergency Response Program

The emergency action plan for the facility includes the following core elements:

1) Specific actions to be taken in response to an accidental release of ammonia; 2) Procedures to notify local and public agencies including the Clark County Fire Department, the Nevada Office of Emergency Management, and the National Response Center as necessary; 3) Information regarding the training of employees; and 4) The facility staff have also discussed the emergency action plan with the Clark County Fire Department and local emergency planning committee (Clark County Office of Emergency Management).

NV Energy will coordinate emergency response with the North Las Vegas (Clark County) Fire Department, Clark County Office of Emergency Management and Nevada Division of Environmental Protection in case of any emergency event.
Submission - Other Facility Info facility_Submission_-_Other_Facility_Info help link help link  
Number of Full Time Employees25
Owner or Operator NameNV Energy
Owner or Operator Address Line 16226 West Sahara Avenue
Owner or Operator Address Line 2MS #30
Owner or Operator CityLas Vegas
Owner or Operator StateNV
Owner or Operator Zip89146
Parent Dun and Bradstreet Number0
Second Parent Dun and Bradstreet Number0
Number of Full Time Employees25
Number of FTE CBI FlagNo
Covered by OSHA PSM StandardNo
Covered by EPCRA Section 302Yes
Covered by CAA Title VYes
CAA Title V Air Operating Permit ID1584
Last Safety Inspection Date01/15/2009
Last Safety Inspection ByFire Department
OSHA Star or Merit RankingNo
LEPC NameClark County LEPC

Submission - Contact Info facility_Submission_-_Contact_Info help link help link (Facility #1 : Silverhawk Generating Station, RMP submission #1 : 2009-06-18)
Owner or Operator Phone7024025759
Facility URLwww.nvenergy.com
Facility Phone7024025000
Facility Emailgshil@nvenergy.com
Facility Dun and Bradstreet Number961601648
RMP ContactKevin Geraghty
RMP Contact TitleVice President, Power Generation
RMP Contact Emailkgeraghty@nvenergy.com
RMP Preparer NameGaurav Shil
RMP Preparer Address Line 16226 West Sahara Avenue
RMP Preparer Address Line 2MS #30
RMP Preparer CityLas Vegas
RMP Preparer StateNV
RMP Preparer Zip89146
RMP Preparer Phone7024025132

Submission - Additional Info facility_Submission_-_Additional_Info help link help link  
RMP Complete FlagYes
Predictive FilingNo
No RMP Accidents Last 5 YearsYes
Complete Check Date06/19/2009
Postmark Date06/17/2009
Anniversary Date06/17/2014
Confidential Business InformationNo

Submission - Lat/Long Info facility_Submission_-_Lat_Long_Info help link help link (Facility #1 : Silverhawk Generating Station, RMP submission #1 : 2009-06-18)
Latitude36.410694
Longitude-114.960750
Valid Lat/LongYes
Lat/Long MethodInterpolation - Other
Lat/Long Location TypeCenter of Facility
FRS Latitude36.41
FRS Longitude-114.96
FRS Lat/Long DescriptionCENTER OF FACILITY
FRS Lat/Long MethodINTERPOLATION - DIGITAL MAP SRCE (TIGER)

Submission - Counts and Totals facility_Submission_-_Counts_and_Totals help link help link  
Number of RMP Accidents0
RMP Accident Flammable Total (lbs)0
RMP Accident Toxic Total (lbs)0
RMP Accident Amount Total (lbs)0
Number of RMP Accidents0
Number of Processes1
Number of Process Chemicals1
Number of Toxic Worst-case Scenarios1
Number of Toxic Alternate Case Scenarios0
Number of Flammable Worst-case Scenarios0
Number of Flammable Alternate Case Scenarios0
RMP Accident Flammable Total (lbs)0
RMP Accident Toxic Total (lbs)0
RMP Accident Amount Total (lbs)0
Total RMP Accident Deaths0
Total RMP Accident Injuries0
Total RMP Accident Evacuated/Sheltering In Place0
Total RMP Accident Property Damage$0

Processes facility_Processes help link help link (Facility #1 : Silverhawk Generating Station, RMP submission #1 : 2009-06-18, process #1 : Aqueous Ammonia Storage)
Process DescriptionAqueous Ammonia Storage
Program Level1
Confidential Business InformationNo
Toxic Amount Total (lbs)190,740
Flammable Amount Total (lbs)0
Process Amount Total (lbs)190,740
Number of Process Chemicals1
Number of Toxic Worst-Case Scenarios1
Number of Toxic Alternate Scenarios0
Number of Flammable Worst-Case Scenarios0
Number of Flammable Alternate Scenarios0

Process Chemicals facility_Process_Chemicals help link help link  
Process Chemical IDAmmonia (conc 20% or greater)
CAS number007664417
Chemical TypeToxic
Process Chemical Amount (lbs)190,740
Confidential Business InformationNo

Process Chemicals facility_Process_Chemicals help link help link (Facility #1 : Silverhawk Generating Station, RMP submission #1 : 2009-06-18, process #1 : Aqueous Ammonia Storage, process chemical #2)
Process Chemical IDPublic OCA Chemical
CAS number000000000
Process Chemical Amount (lbs)0
Confidential Business InformationNo

Worst-Case Toxic Scenarios facility_Worst-Case_Toxic_Scenarios help link help link  
Percent Weight (Within Mixture)29
Physical StateLiquid
Model UsedEPA's OCA Guidance Reference Tables or Equations
Release Duration (minutes)2,734.6
Wind Speed (meters/sec)1.5
Atmospheric Stability ClassF
TopographyUrban
Passive Mitigation - DikesYes
Passive Mitigation - EnclosuresNo
Passive Mitigation - BermsNo
Passive Mitigation - DrainsNo
Passive Mitigation - SumpsNo
Confidential Business InformationNo

Process NAICS facility_Process_NAICS help link help link (Facility #1 : Silverhawk Generating Station, RMP submission #1 : 2009-06-18, process #1 : Aqueous Ammonia Storage, process NAICS code #1 : 221112)
NAICS Code221112: Fossil Fuel Electric Power Generation

Emergency Response Plan Info facility_Emergency_Response_Plan_Info help link help link  
Facility In Community PlanYes
Facility Own Response PlanYes
Specific Facility Response PlanYes
Inform. Procedures in Response PlanYes
Emergency Care in Response PlanYes
Plan Review Date10/21/2008
Response Training Date11/04/2008
Local Response AgencyClark County Fire Department
Local Response Agency Phone7024557311
Subject To - OSHA EAPYes
Subject To - OSHA HAZWOPERNo
Subject To - CWAYes
Subject To - RCRAYes
Subject To - OPANo
Subject To - State EPCRANo


Search Criteria Used
RMP Facility ID100000184864

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