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Capital City Plume
Downtown Montgomery
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Capital City Plume Information

The Capital City Plume (also sometimes spelled Capitol City Plume) is an area in downtown Montgomery previously designated by regulatory agencies where the groundwater (not a source of drinking water) in a 30 to 50 block area has previously showed the presence of several common urban contaminants. The groundwater in this area is generally 25-55 feet below land surface. Contaminants associated with the site to be further assessed include:

  • PCE - perchloroethylene (dry cleaning solvent or cleaning agent) and its daughter products
  • TCE - trichloroethylene (degreaser or cleaning agent)
  • DCE - cis-1,2 – dichloroethylene

There are small amounts of these cleaning agents in the groundwater that may exceed regulatory levels in some places. Drinking water in Montgomery, including downtown, does not come from groundwater in the Capital City Plume area. There is no exposure to workers or residents downtown.

The City of Montgomery, Montgomery County, Montgomery Water Works and Sanitary Sewer Board, the State of Alabama and the Montgomery Advertiser formed the Downtown Environmental Alliance (Alliance) to complete the investigation, risk assessment and develop a remedial action plan (Institutional Controls Plan)  to address the Capital City Plume under an Agreement with the Alabama Department of Environmental Management (ADEM). The selected remedy at the site includes groundwater monitoring and land use controls that restrict the use of groundwater in the downtown area under a City Ordinance, and land use for certain specific areas in the downtown area by Environmental Covenants and City Ordinance.

Please see the IC Map for more information.  Property Owners in the Downtown Environmental Overlay are eligible to place a General Environmental Covenant on their property to provide notice of the Capital City Plume to future property owners.

ADEM issued a concurrence letter on August 2, 2019 and issued a Final Determination Letter on September 25, 2019.  A Remedial Action Report was submitted to ADEM on October 25, 2019.

For more information on the Capital City Plume or to submit questions/comments, contact:

Montgomery City Attorney’s Office
334-625-2050
mgallagher@montgomeryal.gov

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