Presentation on theme: "Lei NA Xiaolong Chen. Historical Background In 1956, Basin F was constructed by the Army in the northeast section of RMA in Colorado. It was designed."— Presentation transcript:
Historical Background In 1956, Basin F was constructed by the Army in the northeast section of RMA in Colorado. It was designed as an open evaporation pond to receive various manufacturing wastes. The Basin F had a surface area of 93 acres and a capacity of approximately 243 million gallons. In 1982, the Basin F was stopped using by the Army.
Historical Background Contd… The contaminants in wastes in Basin F from 1957 to 1982: Organochloric and organophosphoric pesticides and metals e.g: Ardrin; Dieldrin; Vapona; Copper; Zinc; Arsenic
Hazards of The Contaminants The chemicals could produce an enormous amount of hazardous on: 1. Soil 2. Water 3. Air In 1957, hundreds of waterfowl died after landing in open waste ponds. In 1962, farmers began to report unexplained sickness : extensive crop damage; foliage turned yellow, plants failed to mature and many crops were killed outright
Solutions -- Improvement of Basin F March 1988, Interim Response Action(IRA) : improved the wastes holding tanks to enlarge the capacity and set up the incinerator September 1988, Part Two of Basin F IRA initiated for characterization of liquid waste, selection of treatment alternative, testing of treatment technology, design of treatment process. May 1988 – December 1988, Part One of Basin F IRA conducted which was for removal and temporary storage of wastes. May 1988 – June 1988, a heavy rainfall and a tornado affected the structure and equipment of Basin F. Remediation Part One Remediation Part Two
Solutions -- Treatment Technology Primary Treatment Technology: Submerged quench incineration system including: 1. Atomizing liquid injection system 2. Submerged quench incinerator 3. Quench chamber 4. Spray dryer 5. a venturi scrubber for particulate matter control 6. a packed-tower scrubber for acid neutralization 7. a residuals handing facility
Solutions -- Treatment Technology Contd... Supplemental Treatment Technology: Post treatment (air): 1. High-energy venturi scrubber for particulate matter control 2. Packed tower caustic scrubber for acid neutralization of the exhaust gases
Conclusion In May 1996, SQI finished and decommissioned, it was dismantled and sold for parts. The environmental problems had been reduced since 1996. However, there are still restricted area which are not suitable for human activities.