CCP 04-27-1992 - Laserfiche WebLink

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, Twin Cities Army Ammunition Plant (TCAAP) Environmental Update Spring 1992 . Remedial Investigation Feasibility Study Begins The environmental restoration with the completion of the Re- project at Twin cities Army medial Investigation, the pro- Ammunition Plant (TCAAP) marked ject now moves into the Feasi- a milestone in November 1991 bility study Phase. In this with the completion of the Re- phase alternatives are deve1- medial Investigation Phase. oped to clean up the sources of This is the phase in which stu- contamination on the Installa- dies are conducted to determine tion and the contamination what the contaminants are, plume off the Installation. where the sources of contamina- The draft work plan for the tion are located, where the study is being coordinated contamination plumes are head- among the Army I EPA Region V in ed, and what the risks are to Chicago, and the MPCA. The the environment and public plan should be approved early health. this summer. The Remedial Investigation con- cluded that there were 14 known disposal sites at TCAAP. The Other Activities most widespread contaminant is While the overall environmental volatile organic compounds restoration project has moved (VOCs) . Other significant con- into the Feasibility study taminants include metals and Phase, there have been a number . pOlychlorinated biphenyls of clean-up actions already (PCBs) . Three separate source taken. areas on the Installation are the major contributors of VOC . The In-situ . Volatilization contamination to the groundwa- (ISV) and groundwater recovery ter (Sites D, G and I). systems are interim clean-up actions on the Installation A public meeting was held on that continue to operate and November 14, 1991 to discuss remove contaminants from the the results of the Remedial groundwater and soil. The two Investigation Phase. From the ISV systems began operation in comments received at this meet- JanuarYIFebruary 1986 and ing, there are four areas which through January 1992 have re- were of most concern to the moved 227,406 pounds of VOCs public. These areas are: from the soil. The groundwater health concerns, concerns for recovery systems began opera- safe drinking water, length of tion in October 1987 and have time involved with the clean- removed 80,291 pounds of VOCs up, and actions being taken to from the groundwater through clean up the contamination. January 1992. A fact sheet addressing each of . Approximately 1400 cubic these areas is being prepared yards of soil contaminated with by the Minnesota Pollution Con- PCBs were excavated from site D trol Agency (MPCA) and will be and incinerated to destroy the . made available to the public. PCBs. The fact sheets will also be available for review in the two . site F was a burning area lo- information repositories 10cat- cated .on the south-central part ed in the New Brighton City of the Installation. Metals Hall and the TCAAP Administra- contamination of the soil is tion Building #105. the main consideration at . the