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Ormesa Geothermal Projects

Parent Companies:
Ormesa, LLC
EPA Facility ID:
100000165251
Other ID:
Facility DUNS:
0
Parent Company DUNS:
180558710

Location:

Address:
3300 East Evan Hewes Highway
Holtville, CA 92550
County:
IMPERIAL
Lat / Long:
32.772, -115.256 (Get map)
Method:
Interpolation - Photo
Description:
Administrative Building
Horizonal accuracy:
25 m
Horizontal reference datum:
North American Datum of 1983
Source map scale:
24000

Owner/Operator:

Name:
Ormat Nevada, Inc. (Operator)
Phone:
(760) 356-3020
Address:
P.O. Box 86
Holtville, CA 92550 -0086
Foreign Address:

Person responsible for RMP implementation:

Name:
Michael Moore
Title:
Plant Manager

Emergency contact:

Name:
Raul M. Alvarez
Title:
EHS Coordinator
Phone:
(760) 356-3020
24-hour phone:
(760) 457-8584
Ext or PIN:
Ext 41107

Other contacts:

Facility (or company) email:
Facility phone:
Facility (or company) URL:

Safety:

Local Emergency Planning Committee:
CA DTSC/Imperial County CUPA
Full-Time Equivalent Employees:
31
Covered by OSHA PSM:
Yes
EPCRA section 302:
Yes
CAA Title Air Operating Permit:
No
CAA Permit ID#:
OSHA Star/Merit Ranking
No
Last Safety Inspection Date:
June 9, 2016
Inspecting Agency:
Department of Toxic Substances Control
Using Predictive Filing:
No

Processes:

GBU
RMP ID:
1000080767
CBI claimed:
No
Program Level:
3
NAICS:
Geothermal Electric Power Generation (221116)
Chemical name
CAS#
Quantity (lbs.)
CBI
Isopentane [Butane, 2-methyl-]
78-78-4
197,600
No
Public OCA Chemical
0
No
Ormesa 1
RMP ID:
1000080768
CBI claimed:
No
Program Level:
3
NAICS:
Geothermal Electric Power Generation (221116)
Chemical name
CAS#
Quantity (lbs.)
CBI
Isopentane [Butane, 2-methyl-]
78-78-4
189,800
No
Public OCA Chemical
0
No
Ormesa 2
RMP ID:
1000080769
CBI claimed:
No
Program Level:
3
NAICS:
Geothermal Electric Power Generation (221116)
Chemical name
CAS#
Quantity (lbs.)
CBI
Isopentane [Butane, 2-methyl-]
78-78-4
335,400
No
Public OCA Chemical
0
No

RMP Preparer:

Name:
Kyle Snyder
Address:
6225 Neil Road
Reno, NV 89521
Foreign Address:

Phone:
(775) 336-0172

Latest RMP Submission:

Date:
July 1, 2017
Type:
Resubmission
Reason:
5-year update (40 CFR 68.190(b)(1))
Registered:
Yes
RMP ID:
1000064341

Deregistration:

Date:
Effective Date:
Reason:
Other Reason:

2. Toxics: Worst-case

None

3. Toxics: Alternative release

None

4. Flammables: Worst-case

Some Risk Management Plan information is not provided in the available RMP data. You need to make an appointment at an EPA Reading Room In order to get access to details from the Off-Site Consequence Analysis (OCA) such as:

Instructions on how to make an EPA appointment can be found here.

Public OCA Chemical (in GBU)
CBI claimed:
No
Model used:
EPA's RMP*Comp(TM)
Passive mitigation
considered:
  • None
not considered:
  • Blast walls

5. Flammables: Alternative release

Some Risk Management Plan information is not provided in the available RMP data. You need to make an appointment at an EPA Reading Room In order to get access to details from the Off-Site Consequence Analysis (OCA) such as:

Instructions on how to make an EPA appointment can be found here.

Public OCA Chemical (in GBU)
CBI claimed:
No
Model used:
EPA's RMP*Comp(TM)
Passive mitigation
considered:
  • None
not considered:
  • Dikes
  • Fire wall
  • Blast walls
  • Enclosures
Active mitigation
considered:
  • None
not considered:
  • Sprinkler systems
  • Deluge systems
  • Water curtain
  • Excess flow valve

6. Five-year accident history

March 29, 2016 at 18:30
ID:
1000049977
NAICS:
Geothermal Electric Power Generation (221116)
Duration:
48 hours
Chemicals involved:
  • Isopentane [Butane, 2-methyl-]
Release events:
Liquid spills/evaporation
Weather conditions at time of event
Wind speed:
None
Temperature:
None ℉
Atmospheric stability:
Precipitation present:
No
Unknown weather conditions:
Yes
On-site impacts
Deaths of employees or contractors:
1
Deaths of public responders:
0
Deaths of public:
0
Injuries of employees or contractors:
0
Injuries of public responders:
0
Injuries of public:
0
Property damage:
$0
Known off-site impacts
Deaths:
0
Hospitalizations:
0
Medicals treatments:
0
Evacuated:
0
Sheltered-in-place:
0
Property damage:
$0
Environmental damage:
Initiating event:
Human Error
Contributing factors:
  • Maintenance activity/inactivity
Off-site responders notified:
Notified and Responded
Changes introduced as a result of the accident:
  • Revised maintenance
  • Revised training

7. Prevention: Program level 3

GBU, Geothermal Electric Power Generation (221116)
Prevention Program ID:
1000067965
Safety Review Date
June 23, 2017
PHA Update Date
Sept. 2, 2016
PHA Techniques
  • What if
  • HAZOP
Hazards Identified
  • Fire
  • Explosion
  • Overpressurization
  • Overfilling
  • Equipment failure
  • Cooling loss
  • Earthquake
Process Controls
  • Vents
  • Relief Valves
  • Check Valves
  • Manual Shutoffs
  • Automatic Shutoffs
  • Interlocks
  • Alarms
  • Emergency Power
  • Grounding Equipment
  • Rupture Disks
Mitigation Systems
  • Deluge System
Monitoring Systems
  • None
Changes since PHA
  • None
Training Type
  • None
Competency Testing
  • Written Test
  • Oral Test
  • Demonstration
  • Observation
Procedure Review Date
June 23, 2017
Training Review Date
June 27, 2016
Maintenance Review Date
Feb. 15, 2012
Maintenance Inspection Date
May 15, 2017
Equipment Tested
Yes
Management of Change Most Recent Date
None
Management of Change Review Date
June 23, 2017
Pre-startup Review Date
May 1, 2006
Compliance Audit Date
Aug. 15, 2014
Compliance Audit Change Completion Date
Sept. 30, 2017
Incident Investigation Date
None
Incident Invest. Change Completion Date
None
Participation Plan Review Date
June 23, 2017
Hot Work Review Date
Jan. 1, 2017
Contractor Safety Review Date
Jan. 1, 2017
Contractor Safety Eval. Date
May 10, 2017
Ormesa 1, Geothermal Electric Power Generation (221116)
Prevention Program ID:
1000067966
Safety Review Date
June 23, 2017
PHA Update Date
Aug. 31, 2016
PHA Techniques
  • What if
  • HAZOP
Hazards Identified
  • Fire
  • Explosion
  • Overpressurization
  • Overfilling
  • Equipment failure
  • Cooling loss
  • Earthquake
Process Controls
  • Vents
  • Relief Valves
  • Check Valves
  • Manual Shutoffs
  • Automatic Shutoffs
  • Interlocks
  • Alarms
  • Emergency Power
  • Grounding Equipment
  • Rupture Disks
Mitigation Systems
  • Deluge System
Monitoring Systems
  • None
Changes since PHA
  • None
Training Type
  • None
Competency Testing
  • Written Test
  • Oral Test
  • Demonstration
  • Observation
Procedure Review Date
June 23, 2017
Training Review Date
June 27, 2016
Maintenance Review Date
Feb. 15, 2012
Maintenance Inspection Date
March 1, 2016
Equipment Tested
Yes
Management of Change Most Recent Date
July 1, 2012
Management of Change Review Date
June 23, 2017
Pre-startup Review Date
May 1, 2003
Compliance Audit Date
Aug. 15, 2014
Compliance Audit Change Completion Date
Sept. 30, 2017
Incident Investigation Date
June 8, 2017
Incident Invest. Change Completion Date
Dec. 31, 2017
Participation Plan Review Date
June 23, 2017
Hot Work Review Date
Jan. 1, 2017
Contractor Safety Review Date
Jan. 1, 2017
Contractor Safety Eval. Date
June 9, 2017
Ormesa 2, Geothermal Electric Power Generation (221116)
Prevention Program ID:
1000067967
Safety Review Date
June 23, 2017
PHA Update Date
Sept. 1, 2016
PHA Techniques
  • What if
  • HAZOP
Hazards Identified
  • Fire
  • Explosion
  • Overpressurization
  • Overfilling
  • Equipment failure
  • Cooling loss
  • Earthquake
Process Controls
  • Vents
  • Relief Valves
  • Check Valves
  • Manual Shutoffs
  • Automatic Shutoffs
  • Interlocks
  • Alarms
  • Emergency Power
  • Grounding Equipment
  • Rupture Disks
Mitigation Systems
  • Deluge System
Monitoring Systems
  • None
Changes since PHA
  • None
Training Type
  • None
Competency Testing
  • Written Test
  • Oral Test
  • Demonstration
  • Observation
Procedure Review Date
June 23, 2017
Training Review Date
June 27, 2016
Maintenance Review Date
Feb. 15, 2012
Maintenance Inspection Date
June 29, 2017
Equipment Tested
Yes
Management of Change Most Recent Date
July 1, 2012
Management of Change Review Date
June 23, 2017
Pre-startup Review Date
May 1, 2006
Compliance Audit Date
Aug. 15, 2014
Compliance Audit Change Completion Date
Sept. 30, 2017
Incident Investigation Date
April 20, 2011
Incident Invest. Change Completion Date
June 1, 2011
Participation Plan Review Date
June 23, 2017
Hot Work Review Date
Jan. 1, 2017
Contractor Safety Review Date
Jan. 1, 2017
Contractor Safety Eval. Date
June 16, 2017

8. Prevention Program level 2

No Prevention Program level 2

9. Emergency response

Facility In Community Plan:
Yes
Facility Own Response Plan:
No
Specific Facility Response Plan:
Yes
Inform. Procedures in Response Plan:
No
Emergency Care in Response Plan:
Yes
Plan Review Date:
Response Training Date:
Oct. 31, 2016
Local Response Agency:
Local Response Agency Phone:
(760) 356-2991
Subject To - OSHA EAP:
No
Subject To - OSHA HAZWOPER:
No
Subject To - CWA:
No
Subject To - RCRA:
No
Subject To - OPA:
No
Subject To - State EPCRA:
Yes
Subject To - Other:

Executive Summary

Ormesa LLC (The Ormesa Geothermal Projects are operated by Ormat Nevada, Inc. (Ormat), and owned by Ormesa LLC). The Ormesa Geothermal Projects are near the Cities of El Centro and Holtville, California within the East Mesa Known Geothermal Resource Area (KGRA). The facilities are located east of the Highline Canal. They generate electricity from renewable geothermal resources in an environmentally friendly manner.



Ormat operates the Ormesa Geothermal Projects in accordance with all applicable federal, state, and local environmental and safety regulations and is committed to maintaining compliance with these regulations. The Ormesa Geothermal Projects have emergency response procedures and protocols in place at the facility in coordination with local emergency response agencies.



The project area, defined as the stationary source under RMP, covers a large geographic area and consists of three independent geothermal power plants, and associated geothermal wells. Each power plant is separate process as defined under the CalARP regulation as well as the Federal EPA Risk Management Program Regulation (RMP, codified at 40CFR68), and the Federal OSHA Process Safety Management Regulation (PSM, codified at 29CFR1910.119).



Ormesa 1: Is a binary geothermal power plant consisting of four Ormat Energy Converters (OECs). The OECs extract heat from pumped hot geothermal brine to vaporize isopentane, which in turn drives associated turbines and electrical generators. The isopentane exiting the turbine is condensed, pumped, and re-vaporized in a closed-loop cycle. Approximately 12-14 megawatts of power is generated from this plant.



Ormesa 2: Is a binary geothermal power plant consisting of two Ormat Energy Converters (OECs). The OECs extract heat from pumped hot geothermal brine to vaporize isopentane, which in turn drives associated turbines and electrical generators. The isopentane exiting the turbine is condensed, pumped, and re-vaporized in a closed-loop cycle. App
roximately 15 megawatts of power is generated from this plant.



GBU: The GEM Bottoming Unit (GBU) is a binary geothermal power plant consisting of one Ormat Energy Converters (OECs) and one brine reinjection pump unit. There are adjacent dual flash plants, GEM 2&3, at this location that flash geothermal brine to produce steam to drive turbines and electrical generators. The GBU plant extracts heat from the hot residual liquid that remains after the brine is flashed at GEM 2&3. The heat from the dual flash plant liquid is used to vaporize isopentane, which in turn drives associated turbines. The isopentane exiting the turbine is condensed, pumped and re-vaporized in a closed loop cycle. One turbine drives an electrical generator, producing approximately 3 megawatts of power. The other turbine drives a brine reinjection pump rated at 3,500 Hp. It should be noted that the GEM2 dual flash plant has been decommissioned at this time and all hot brine for the GBU is produced from GEM 3.



All three Ormesa processes are subject to RMP, PSM, and CalARP due to the presence of isopentane in excess of 10,000 pounds in each process. Isopentane is a listed flammable substance in RMP and CalARP. Isopentane meets the definition of a flammable liquid under the PSM regulation.



Offsite consequence analyses have been conducted for each of the three Ormesa processes. A worst case release can potentially impact offsite public receptors on an adjacent recreational area. The most stringent prevention program requirements are applied at all Ormesa processes.



Ormat has revalidated the prevention programs required by RMP, PSM, and CalARP.



Process Safety Information:

- MSDS (in the new safety data sheet format) is available for isopentane and the hazards are well understood.

- Block flow and heat and mass balances are available for all processes.

- Maximum intended inventory is defined.

- Safe upper and lower limits with consequences of deviation are defined for each proce
ss.

- Piping & Instrument Diagrams were revalidated in 2016 as part of the PHA revalidation effort.

- Electrical Hazardous area classification is Class 1, Division 2 within the process areas where isopentane is present.

- Relief system required design capacities and set pressures were determined. The installed PSVs are being evaluated to confirm they provide the required relief capability.

- Safety system descriptions are developed and confirmed current.

- Codes and standards related to foundations, pressure vessels, piping and electrical were defined and current at the time of the plant construction.



Process Hazard Analysis:

- PHAs for all three processes were revalidated in 2016 to reflect current operation.

- Potential hazards were identified and the adequacy of hazard mitigation evaluated.

- Recommendations resulted from each PHA revalidation to improve hazard mitigation. Implementation of those recommendations is being tracked.

- A seismic assessment has been re-conducted in June, 2017 and recommendations will be implemented and tracked.



Standard Operating Procedures

- Standard Operating Procedures have been validated and deemed current.



Training Programs

- Training programs have been restructured and generally improved within the last year.



Maintenance Programs

- Maintenance programs are



Management of Change and PreStartup Safety Review

- MOC and PSSR procedures are in place



Contractor Program



Incident Investigation



Hot Work



Compliance Audits

- Compliance audit recommendations from the 2014 audit have been implemented

- A new compliance audit for all Ormesa facilities is due in August, 2017.