THE HARD AGE SUPERFUND SITE: A REMEDIAL DESIGN/REMEDIAL ACTION CASE STUDY

摘要

The Hardage Site operated as a permitted hazardous waste disposal facility from 1972 to 1980. Approximately 20 million gallons of wastes were shipped to the site. In 1984, EPA notified companies they were Potentially Responsible Parties for clean-up. NES provided project management services during RD/RA at Hardage. Remedy Design occurred between 1991 and 1993. Remedy components include 19 groundwater wells; 2,600-foot-long gravel-filled groundwater interceptor trench; 7,300-foot-deep Class-I non-hazardous injection well; removal of 3,820 drums; general site cleanup and debris removal; 80 gpm water treatment plant; and 14 acre RCRA cap over the source areas. Total construction cost was $20.7 million. The project was brought in on time and on budget with change orders less than 2 percent of the project total. Currently, NES is operating the remedy. The automated nature of the water treatment plant provides for 24-hour per day operation. Over 10 million gallons of water have been pumped, treated and discharged to the on-site, Class-I, non-hazardous injection well. Over 300,000 gallons of aqueous waste and NAPL have been safely removed and incinerated off-site.