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EAST PLUME
<br />.Location: Minneapolis
<br />Pollutants: VOCs
<br />Description: Degreasers and solvents
<br />from roundhouse and former chemi-
<br />cal distribution center created this pot
<br />lution plume.
<br />F1~IHLEY C3RDN.~NCE
<br />'' PL A.AdT PLUMES
<br />Location: Fridley
<br />Pollutant: TCE
<br />Description: Two stable chemical
<br />plumes at a Navy munitions plant on
<br />the Mississippi River no longer threat-
<br />enthe Minneapolis water supply..
<br />IILAIAIE GRQUNIRFVRTER
<br />PLLFME
<br />Location: Blaine
<br />Pollutant: DCA
<br />Description: Industrial chemical from
<br />an unknown source affects ground-
<br />waterbeneath 1% square miles. City
<br />treats water from affected wells.
<br />EAST l3E°CTiEL
<br />LP~AII4FILL PLt7ME
<br />Location: East Bethel
<br />Pollutants: VOCs, other chemicals
<br />Description: Groundwater near closed
<br />.landfill is constantly extracted so the
<br />small pollution plume won't grow.
<br />ARtdk AMMI7IdI'I'It3N
<br />PLF11V~` FLUME
<br />Location: Arden Hills, New Brighton,
<br />Columbia Heights, Fridley, Mounds
<br />View, St. Anthony, Minneapolis
<br />Pollutant: TCE
<br />Description: Two suburbs must filter.
<br />water from this 8-square-mile plume
<br />containing solvents from a former
<br />,munitions plant in Arden Hills (1941-
<br />1975).
<br />a , itVQOD TREFcTMENT PLUME
<br />Location: New Brighton
<br />Pollutants: PCP, other chemicals
<br />Description: Shallow groundwater
<br />near the closed MacGillis & Gibbs
<br />plant is extracted and treated to re-
<br />move wood-preserving chemicals.
<br />Flw~. 9~/
<br />AiORTIi r3AKS PLUME
<br />Location: North Oaks, White Beaz
<br />Township
<br />Pollutant: Vinyl chloride
<br />I:
<br />Description: Contamination from a
<br />dump on Hwy. 96 (1920s-1$74) has
<br />migrated under Gilfillan Lake in North
<br />Oaks, affecting some residents' wells.
<br />BAY Tf3Va'N 'TC3N5HlP
<br />TCE PLUME
<br />Location: Bayport, Baytown and West
<br />Lakeland townships, Lake Elmo
<br />Pollutant: TCE
<br />Description: Solvents from an equip-
<br />ment maker (1940-1968) affected
<br />groundwater under 7 square miles;
<br />160 home wells require filters.
<br />LAItELAbltl i
<br />GROUI~ID~'TI~'TER PLUMES
<br />Location: Lakeland, Lakeland Shores,
<br />Afton
<br />Pollutants: VOCs, BTEX
<br />Description: Chemicals in about 100
<br />private wells prompted construction
<br />of a municipal water supply in 1991.
<br />Two groundwater plumes afe believed
<br />stable, with chemical levels dropping.
<br />3M c9Ak£DALE Dtdt!iP
<br />PLUME
<br />Location: Oakdale and neazby azeas
<br />Pollutants: PFCs, VOCs
<br />Description: Waste dump used by
<br />3M (1956-1960) is one of three sources
<br />of PFCs in vicinity. Chemicals have
<br />spread to the south.
<br />CUtsNI'~? L~iNi3F°lLL
<br />,` &'LUME
<br />Location: Lake Elmo and nearby areas
<br />Pollutants: PFCs, VOCs
<br />Description: Closed public landfill
<br />(1969-1975) accepted wastes from
<br />many sources, including 3M; affects
<br />groundwater to south and east.
<br />3M Y~Tt:3t7TlP.,UR~ D[1MP
<br />PLUME
<br />Location: Woodbury and neazby areas
<br />Pollutants: PFCs, VOCs
<br />Description: Large areas of PFC-con-
<br />taminated groundwater lie south and
<br />west of this 3M dump (1960-1966)
<br />Note: Shaded area shows where well restric- Note: The PfBA contamination is also beneath
<br />lions apply; chemical plume not mapped. Afton, Cottage Grove, Denmark Township, Grey
<br />Cloud Island Township, Hastings, Landfall,
<br />Maplewood, Newport, St. Paul Park and South
<br />St.Paul.-
<br />]tEFIl1TE~Y/PCP PLUME
<br />Location: St. Paul Pazk.
<br />Pollutants: PCP, petroleum
<br />Description: Small plume near Mis-
<br />sissippi River from a former wood
<br />treating business and a refinery now '
<br />owned by Marathon Oil Co.
<br />Prza~ Ex~ L~n1zsF1LL
<br />~ Location: Inver Grove Heights
<br />Pollutants: VOCs ,
<br />Description: Small, stable plume in shat- .
<br />low groundwater near Mississippi River.
<br />F'F.INT H7.LLS REPlhIEItY
<br />`' Pk.UME
<br />Location: Rosemount
<br />Pollutants: BTEX
<br />Description: Plume of pollution from
<br />refinery extends 1.5 miles to Mis-
<br />sissippiRiver; 4.1 million gallons of
<br />wastes removed so far.
<br />g„ FARMI16iGTQ1V PLUME
<br />Location: Farmington
<br />Pollutant: PCE
<br />Description: Narrow plume of
<br />groundwater tainted with dry-
<br />cleaner chemicals'migrating towazd
<br />Vermillion River, a trout stream.
<br />CHEMICALS IN THE WATER xEY: (c) cARC1NOGEN; (PC) POSSIBLE CARCINOGEN AT STARTRIBUNE.CQM[GROUNDWATER
<br />Arsenic: Semi-metal element from
<br />natural deposits, agricultural practices,
<br />industrial uses (PC).
<br />Benzene: Colorless liquid widely used
<br />in making other compounds (C) .
<br />BTEX: Stands for benzene, toluene,
<br />ethylbenzene and xylene; found in
<br />petroleum.
<br />1,1-DCA: Oily liquid used to make such
<br />things as finish removers (PC).
<br />1,2-DCA: Oily liquid used in plastics,
<br />rubber, resins, fumigants (PC).
<br />PAHs: Polycyclic aromatic hydrocaz-
<br />bons; chemicals found in coal tar,
<br />crude oil, creosote (PC).
<br />PCE: Colorless liquid used in dry clean-
<br />ing.Also known as perchloroethylene.
<br />PCP: Organic solid once used as a wood
<br />preservative (PC).
<br />PFCs: Perfluorinated chemicals, includ-
<br />ing PFOA, PFOS and PFBA, formerly
<br />used in 3M coatings and stain-resis-
<br />tantproducts.
<br />TCA: Trichloroethane is a solvent used
<br />in spot cleaners, other products.
<br />Toluene: Clear, colorless liquid with a
<br />distinctive odor used in thinners, ad-
<br />hesives (PC).
<br />TCE: Trichloroethylene, a liquid grease
<br />remover or solvent.
<br />Vinyl chloride :Colorless gas often
<br />formed vvhen certain chemicals break
<br />down (C).
<br />VOCs: Volatile organic compounds; in-
<br />cludes solvents and other chemicals.
<br />Xylenes: Solvents acid thinners.
<br />i
<br />Source:EPA,CDC '
<br />• An interactive map with magnified
<br />views of groundwater plumes, plus
<br />information about chemicals, the history
<br />of the pollution and cleanup efforts.
<br />• A blog inviting readers to comment on
<br />groundwater issues, health. concerns and
<br />the series.
<br />• A gallery. of photos from this story.
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