NEPA Document Collection for: DOI-BLM-NV-W010-2012-0057-EA
EA at Brady Hot Springs Geothermal Area for Geothermal/Well Field
EA for Well 15-12 Hydro-Stimulation at Brady Hot Springs Geothermal Area for Geothermal/Well Field
Ormat proposes to implement a hydro-stimulation program (EGS) to increase energy production by enhancing natural hydraulic connections within the existing hydrothermal system.
Conditions of Approval
CONDITIONS OF APPROVAL
1. This approval is contingent upon the lessee/operator being in receipt of and in compliance with all appropriate federal, state, and local permits.
2. When cultural or paleontological resources, including but not limited to historic ruins, prehistoric artifacts and fossils, are discovered in the performance of the permit, the resources shall be left intact and immediately brought to the attention of the BLM authorized officer.
3. Pursuant 43 CFR 10.4(g) the holder of this authorization must notify the authorized officer, by telephone, with written confirmation, immediately upon the discovery of human remains, funerary objects, sacred objects, or objects of cultural patrimony (as defined at 43 CFR 10.20). Further, pursuant to 43 CFR 10.4(c) and (d), the lessee/operator shall immediately stop all activities in the vicinity of the discovery and protect it for 30 days or until notified to proceed by the BLM authorized officer.
4. No hazardous materials shall be used during any phase of the operations unless prior approval has been obtained from the BLM authorized officer. All onsite drilling materials and chemicals shall be properly stored to ensure the prevention of spills. No chromate or other heavy metals or environmentally harmful additives will be used.
5. No chemicals, fuels, oils, lubricants, noxious fluids shall be disposed of at the drill site, in the reserve or flow pits or down the well.
6. If any chemicals, fuels, oils, lubricants, and/or noxious fluids are spilled during drilling, testing, and completion operations, they shall be cleaned up immediately. The lessee/operator shall have absorbent on site for spill containment. After clean up, the chemicals, fuels, oil, lubricants and/or noxious fluids and any contaminated material shall be removed from the drill site and disposed of at an approved disposal facility. No chemicals, fuels, oils, lubricants, noxious fluids would be disposed of at the drill site, in the reserve or flow pits or down the well.
7. The lessee/operator shall be responsible for all costs associated with any releases of chemicals and/or subsurface fluids resulting from their operations and practices.
8. Material Safety Data Sheets for all drilling mud components are to be provided to the Hazmat coordinator at the Winnemucca Field Office.
9. The reserve pit shall be fenced on three sides during drilling. Upon completion of the drilling operation, when the site is unoccupied, the fourth side shall also be fenced until the liquid has evaporated out of the reserve pit.
10. Portable chemical toilets shall be used for human waste. The human waste shall not be buried on site.
11. All equipment and machinery shall be equipped with spark arresters and mufflers.
12. The lessee/operator shall be responsible for all suppression costs for any fire resulting from their operations and practices.
13. Trash and other debris shall be contained onsite and then hauled to an approved landfill. Burial and/or burning onsite shall not be permitted.
14. The lessee/operator shall be responsible for controlling all noxious weeds and other undesirable invading plant species in the disturbed operating and reclaimed area until the revegetation activities have been determined to be successful and accepted by the BLM authorized officer. The lessee/operator shall obtain approval from the BLM authorized officer for any application of herbicide, and the request must include descriptions of the types and quantities. Unless certified weed free seed is procured for the reclamation of this project, all seed shall be tested for purity, noxious, poisonous and or prohibited plant species, and the test results submitted to and approved by the BLM authorized officer.
15. When the production and observation wells are successfully completed, all well head and surface production equipment and facilities shall be painted a color that blends with the natural surroundings. The authorized officer shall be contacted and BLM Winnemucca Field Office staff consulted prior to the selection of the color.
16. Once the wells are successfully completed, the drill pad shall be reduced in size to only that necessary for production, injection, testing, working over, re-entering, or observation operations.
17. If a completed well will be sitting idle for more than a year, the site shall be scarified and seeded with the BLM recommended seed mix.
18. Upon abandonment of the geothermal wells, the following shall be done:
a. The wells shall be plugged to comply with all Federal and State of Nevada regulations.
b. All reclamation of disturbed areas shall be completed within one year from the date of proper plugging and abandonment of the well. Any constructed roads, drill pads and reserve pits shall be recontoured to original grade, salvaged topsoil spread on the disturbed area and the site scarified. The disturbed area shall be seeded by hand broadcasting or drilling with the BLM recommended seed mixture. The BLM Winnemucca Field Office shall be notified in writing when reclamation operations commence and are completed.
Data Completion Notes
Data entry complete 8/9
|Areas of Critical Environmental Concern||
No new ground disturbance
|Invasive, Nonnative Species||
|Native American Concerns||
From the letters and phone contacts made on September 20,2012, it was determined that none of the Tribes had any concerns regarding the proposed action. On November 21, 2012, a letter and copy of the Preliminary EA were provided to the above referenced Tribes. No comments or concerns were provided to the BLM from the Tribes contacted regarding review of the Preliminary EA.
|Prime or Unique Farmlands||
|Threatened and Endangered Species||
|Wastes Hazardous or Solid||
CloseMaterial Safety Data Sheets for all hazardous chemicals would be kept on site with copies submitted to the BLM WDO/HRFO prior to operations commencing.
Secondary containment structures would be provided for all chemical and petroleum/oil storage areas during operations. Additionally, absorbent pads or sheets would be placed under likely spill sources and spill kits would be maintained onsite during operations to provide prompt response to accidental leaks or spills of chemicals and petroleum products. Any releases above reportable quantities would be reported to the Nevada Division of Environmental Protection and the BLM WDO/HRFO.Solid wastes generated by the proposed action would be stored onsite until transported offsite to an appropriate landfill facility in accordance with federal, state, and local regulations. Handling, storage, and disposal of hazardous materials, hazardous wastes, and solid wastes would be conducted in conformance with federal and state regulations to prevent soil, groundwater, or surface water contamination and associated adverse effects on the environment or worker health and safety.
|Wetlands and Riparian Zones||
|Wild and Scenic Rivers||
|Induced Seismicity Impact||
CloseProtocol for Induced Seismicity
The DOE introduced an enhanced version of the Protocol for Addressing Induced Seismicity Associated with Enhanced Geothermal Systems (Majer et al., 2012). This protocol’s steps are: • Step 1: Perform Preliminary Screening Evaluation • Step 2: Implement an outreach and communication program • Step 3: Review and select criteria for ground vibration and noise • Step 4: Establish local seismic monitoring • Step 5: Quantify the hazard from natural and induced seismic events • Step 6: Characterize the risk ofinduced seismic events • Step 7: Develop risk-based mitigation plan
In the last few years (2010 to present) Ormat, in cooperation with the DOE, has performed Steps 1 through 7.The risk based mitigation plan (Step 7) consists of halting injection operation activities if one of two thresholds are met; the first being a seismic event of magnitude 2.5 measured by the seismic monitoring array at the Brady well field and the other; a single reading over 0.02g or more than 10 readings per day over 0.002g peak ground acceleration measured at a ground motion sensor located in Fernley, 20 miles to the southwest.The ground motion limits are based on engineering standards. A Trigger report would be produced documenting the occurrence and a determination would then be made by DOE and BLM if the occurrence is natural or operation-induced. Phone calls to key personnel at the DOE, BLM, and Churchill County authorities would be made immediately. Daily stimulation reports would be sent to both the DOE and the BLM.