Program Three
Thursday, May22, 1997

Remediation Kansa C/D



B. Costello and K. Wogsland, Nationwide Environmental Services, Inc., 710 Kipling Street, Suite 303, Denver, CO 80215 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 by almost 400 companies and state and federal government agencies.

In 1984, EPA notified companies that used the Hardage Site that they were Potentially Responsible Parties for cleanup. Nationwide Environmental Services, Inc. provided total project management services during remedial design/remedial action at Hardage.

Design of the overall remedy occurred between 1991 and 1993. In November 1993, a construction contract was signed, by January 1994 construction had began in earnest. Remedy components include: NAPL Recovery System in the barrel mound and main pit source areas; 19 ground water extraction wells; 2,600 foot long gravel filled ground water interceptor trench containing six recovery sumps; 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.

By mid-March 1995 the Remedy had been constructed and tested and the six-month, start-up period began. 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.

On September 6, 1995, the long-term O&M of the Remedy began. From the start-up in March 1995 to the end of 1996, 16.7 million gallons of water were pumped, treated and discharged to the on-site, Class-I, non-hazardous injection well. More than 150,000 gallons of aqueous liquids and 75,000 gallons of NAPL have been safely removed from the Barrel Mound and Main Pit source areas.

Key words: remedial design, remedial action, NAPL, injection well

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Tuesday, May 20, 1997

Metals Kansa A

Remediation of Munitions Compounds Kansa B

Analytical Methods Kansa C/D

General Topics Kansa B

Wednesday, May 21, 1997

Metals Kansa A

Zero-Valent Metals Kansa A

Remediation Kansa A

Vegetation-based Remediation Kansa B

Partnerships & Innovative Technologies Kansa C/D

Nonaqueous Phase Liquids Kansa C/D

Thursday, May 22, 1997

Biofilms & Barriers Kansa A

Bioremediation Kansa B

Partnerships & Technology Innovations Kansa C/D

Remediation Kansa C/D


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