NV Energy — Reid Gardner Power Station

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Readers Note: This webpage provides information about ongoing remediation activities at th e Reid Gardner Power Station in Southern Nevada. Information about "appeals" related to the power station are posted on the State Environmental Commissions Website — look under "Appeal Hearings".

Administrative Order on Consent:

NV Energy and the NDEP entered into an Administrative Order on Consent (AOC) for the Reid Gardner Generating Station site on February 22, 2008. The AOC calls for NV Energy to continue with environmental contaminant characterization activities, including identification of clean-up measures for the soil and groundwater at the site and implementation of these clean-up measures. The AOC also calls for long-term operation and maintenance of NDEP-approved clean-up measures.

Potential environmental contaminants identified at the site include, but are not limited to, total dissolved solids (TDS), sulfate, chloride, metals, volatile organic compounds (VOCs), and petroleum hydrocarbons.

Remediation Activities:

The Reid Gardner Generating Station process water effluent, which is routed to evaporation ponds, is water that has been used in one of the processes to generate electricity, and is no longer suitable for any other uses. Historically, some of these evaporation ponds did not include engineered liners, which has resulted in impacted shallow groundwater at the station. Currently, all active evaporation ponds are underlain by high density polyethylene (HDPE) double-lined with an inner leak-detection and collection system to protect groundwater. There are no surface water discharges of wastewater from the station, as the plant is a Zero Liquid Discharge facility. For more historical information about the Reid Gardner Generating Station, please read this FACT SHEET.

NV Energy has been cleaning out and closing the historic ponds. The removal of “pond solids” has been completed at seven ponds (Ponds 4A, 4C1, 4C2, D, E2, F, and G) of the 11 ponds that are in the Muddy River flood plain [MAP]. Solids will be removed from Ponds 4B1, 4B2, 4B 3, and E-1 in 2016 and 2017. All Ponds located in the Muddy River floodplain have been taken out of service and no longer receive process water. Groundwater beneath the ponds is currently undergoing assessment and monitoring.

A number of potential petroleum source areas have been identified in the plant section that supports active power generation. These areas could not be investigated while power generating activities were occurring. At the end of 2014, generating units 1, 2, and 3 were decommissioned and the petroleum source areas in the vicinity of those three generating units underwent investigations. Four petroleum source areas have been investigated and remediated by removing the soil affected by the petroleum hydrocarbons. Once the final generating unit, unit 4, is decommissioned in 2017, additional petroleum source areas will be investigated and considered for appropriate remediation efforts.

Diesel fuel, which was discovered floating on groundwater in in the late 1980s at the petroleum source area of the site, likely resulted from former underground diesel-fuel piping. A diesel recovery system, which recovers free product and contaminated groundwater, began operation in 1988 and was upgraded in 2003 and again in 2013. An investigation, which began in 2015, is currently underway to delineate the extent of petroleum impacts to soil and groundwater. The diesel recovery system is currently decommissioned, while soil excavation and groundwater investigation continues.

In addition to the groundwater impacts associated with the on-site ponds and diesel fuel piping, various other potential areas of soil and groundwater contamination have been identified. These areas will also be addressed through implementation of the AOC. These efforts may include sampling soil and groundwater to characterize potential site contamination and then, as appropriate, implementing NDEP-approved clean-up activities.




Reid Gardner Generating Station AOC Meeting Minutes
    2013:
       
    2014:
       
    2015:


Reid Gardner Generating Station NDEP Correspondence
    2013:
     
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    2014:
       
    2015:
       
    2016:


Reid Gardner Generating Station Reports and Work Plans

    2013:
       
    2014:
       
    2015:
       
    2016:


Capstone Documents

     
Information Contact:
  • NDEP Primary Case Officer — NDEP Carson City Office: (775) 687-9396

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