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WATER GREMLIN PUBLIC HEALTH ASSESSMENT: PUBLIC COMMENT DRAFT V. Drinking Water A. Municipal Water The source of drinking water for many people in the area around the Water Gremlin property is municipal wells operated by White Bear Lake (WBL), White .BearTownship (WBT), or Vadnais Heights. As described earlier, these municipal drinking water wellsAre over 350 feet deep and draw water from bedrock aquifers (the Prairie du Chien group. and Jordan Sandstone). They are not expected to be.: affected by shallow groundwater contamination. The thme.munic.ipa1, systems regularly test for VQCs (which includes TCE, and other compounds detected in shallow groundwater at the Water Gremlin property) to meet federal Safe Drinking Water Act requirements. Data collected by MDH over 'the fast 25 years shows. TCE has never been detected in the m.unicipaI drinking water :in WBL, WBT, or Vadnais Heights. Water from mun'icipal.welIs fro m.aII three systems was tested for 1,4-dioxane in the years shown) n the tablebelow. 1,4-Dioxane. was not detected in any of theme IIs with the exception of Vadnais Heights in 2.021. The three: municipal wells tested in Vadnais Heights alf had detections of 1,4-dioxane. at. low concentrations {0:069, 0.078, and 0.46 ppb) in December 2021. These detectionsare. .below the MD.H HRL.and are not a health concern. The source of the Vadnais Heights well contamination has not:been identified. Table 9: Years of.1,4 dioxane sampling. of municipal drinking water White Bear Lake 2014,2015 White Bear Township 2014; 2015, 2020 Vadnais Heights 2013, 2014, 2021 Annual water quality reports far municipal drinking water systems, called .Consumer Confidence Reports, describe where drinking watercomes from and any regulated contaminants that are detected. They are available on the webpages for the municipalities: • White Mar -Lake Consumer Confidence Report (http://www.w h itebea rl a ke. ore/pu bicwo rks/page/consumer-confidence-re park) White Bear Township Water Quality Report (http://www.ci.white-bear-�towhi hib.mn.ut/416/Water- Quality-Report) • Vadnais Heights. Water Quality. Report. (https://cityyadnaisheiehts.com/499/Water-Quality-Report) B. Private Wells A number of residences in the area near Water Gremlin rely on private drinking water wells. Nearly all Gem Lake residents rely on private Wells.for their' drinking.water, as: their city does not own or operate a co m m u n ity .pu bl is wate r su pply. system.. In March 2019, to provide additional :reassurance to.a.rea residents, the ..Minnesota Department of Health (MD.H) sampled 13 Private wells that Were selected to represent groundwater near the Water Gremlin facility. -Water samples were analyzed at the MDH Public Health Laboratory for a standard list of 68. VQCs,'includIng TCE and itsbreakdown products, No contaminants were detected. in any of the wells 36