Hardage-Criner Superfund Site


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Hardage-Criner Superfund Site

NES is the Technical Manager and O&M contractor at the Hardage-Criner Superfund Site (Hardage Site) near Oklahoma City, Oklahoma, for the Hardage Site Remedy Corp. NES’ responsibilities include sampling; reporting; budgeting; invoicing; regulatory agency negotiations; operating and maintaining the remedy components; managing hazardous waste shipping, manifesting and reporting; and maintaining the grounds and security of nearly 700 acres. At the Hardage Site, NES provides staff for the operation of the completed remedial action. The team consists of a Facility Manager and two on-site technicians. Because much of the Hardage Site is automated, the on-site technicians work 5 eight-hour shifts and rotate being on call for response to shutdowns or emergencies after hours. A local contractor that currently provides labor when work demands exceed NES’ on-site capabilities provides emergency back-up staffing if one of NES’ employees should be unavailable to work for an extended period.  

NES managed all aspects of the $10 Million RD/RA effort leading to the design and construction of the court-ordered remedy.  NES managed the project coordination of all technical work including extensive field studies for the RI/FS and remedy litigation with EPA.

Every Consent Decree RI/FS and court-ordered design and construction deadline was met. The nearly $21,000,000.00 million remedial action was completed on time and on budget with change orders less than 2% of the value of the work. Remedy components include:

  • Six recovery wells pumping groundwater from a 2,600-foot long, 60-foot deep gravel-filled extraction trench;
  • Nineteen groundwater extraction wells;
  • A water treatment plant, designed to operate at 15 to 20 gallons per minute (25,000 gallons per day) that includes a NAPL separation facility;
  • A network of 16 wells that recovers contaminated water and NAPL from source areas on the site;
  • A facility for handling, separating, storing, and loading for shipment the contaminated water and NAPL;
  • A 7,200-foot deep injection well that received all of the treated groundwater from the site;
  • A 14-acre RCRA cap;
  • Several miles of site roads and fencing and several hundred acres of institutional controls property adjacent to the site boundaries; and
  • Operation of a complex network of monitoring wells, piezometers, and stream sampling locations; related performance monitoring, sampling, data acquisition, and reporting for all on-site activities.

NES has organized and conducted contact and negotiation with state and federal agencies, local citizens, and media representatives. NES served as Project Manager during the field operations portion of a bioremediation feasibility study. Responsibilities included design of the study, coordination of all on-site drilling and waste sampling activities, interaction with EPA oversight contractors, and cost control.

NES served as Project Manager for the field implementation of a detailed, interdisciplinary geologic/hydrogeologic investigation of the Hardage Site. Field programs included drilling, sampling, and geophysical testing of vertical and slant boreholes. The field program lasted approximately three months.

What’s New?

The Hardage Site is in its 23rd year of Operation and Maintenance. NES is vigilant in keeping operating costs down, and our ongoing evaluation of remedy components and monitoring programs to reduce expenses has led to  numerous cost savings measures:

  • The Southwest Wells Recovery System is on standby and part of the Monitored Natural Attenuation (MNA) remedy component;
  • The number of monitoring wells in the annual sampling of the MNA component has been reduced;
  • The frequency of hazardous waste shipments have decreased by following 40 CFR 262.34(e), which allows hazardous waste to be accumulated up to 270 days if: (1) more than 100 kg and less than 1,000 kg of hazardous waste is generated in a month, (2) the waste is transported over 200 miles, and (3) the quantity onsite does not exceed 6,000 kg;
  • The frequency of measuring liquid levels under the RCRA cap coincides with the hazardous waste shipments to limit potential exposure;
  • An energy efficient Passive Aeration System has replaced the traditional water treatment plant as a permanent remedy component; and
  • The water treatment plant was decommissioned in 2014.

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