Project:
Former Electronics Manufacturing Facility
Bottom Line: Designed, installed, and operated complex systems with high uptime, including bioreactors, electrical resistance heating, and self-regenerating granular activated carbon system.
Summary of Project
The site formerly contained several structures housing offices, low-level radiation exposure testing, hazardous materials storage, and semiconductor manufacturing. From 1959 to the 1980’s, compounds used or generated at the site included waste solvents and oils stored in five USTs. The site structures were demolished from 1994 through 1996. DNAPL was first encountered in 2003.
- Prepared and submitted a remediation plan for source area thermal remediation of soil and groundwater impacted with DNAPL.
- Operated client-owned offgas treatment system at 98 percent uptime in support of an 11-month electrical resistance heating program. Collected and managed over 32,000 pounds of VOC mass during the program.
- Performed system start-up and O&M of an 80-gpm groundwater treatment system in accordance with NPDES permit requirements. The original treatment system included air stripping and biological treatment.
- Evaluated and modified the treatment system including addition of an anti-foam agent, ozone treatment, liquid-phase carbon adsorption, and design and installation of three deep extraction wells between 130 and 135 feet and a DNAPL recovery and extraction well to 125 feet. Modified the NPDES permit to reflect the system changes.
- Installed and operated a vapor-phase carbon treatment system for the air stripper discharge. The system includes onsite steam regeneration of the carbon including a boiler, water conditioning skid, cooling tower, chiller, and solvent decanter.
- Performed start-up and operated a 150-gpm fluidized-bed biological treatment system to treat ketones. Decommissioned the bioreactor after ketones concentrations decreased below NPDES limits and arranged for sale of equipment.
- Performed feasibility study of in situ groundwater treatment technologies. Designed and performed several pilot tests to assess the effectiveness of oxidants for destroying VOCs in the saturated zone.