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WATER GREMLIN PUBLIC HEALTH ASSESSMENT- PUBLIC COMMENT GRAFT Monitoring for lead in.outdoor air on the.Water Gremlin property began in September 2019.and indicates lead emissions are; and. have been, well below the National Ambient.Air quality Standard of O.i. µg/m5 set by the U.S,. EPA to protect public health. Lead emissions are expected to deposit to the ground :near WaterGrem[in's facility. MD.H's Blood Lead Information System (BLIS) database was queried and confirmed rates of elevated blood lead for children in zip code 55110 did not differ significantly from a comparison area, suggesting the Community was not exposed to harmful. amounts of lead from:. facility air emissions. Next Steps/Recommendations: MDH recommends that MPCA continue to closely evaluate air emissions from Water Grem lin's.facility and ensure adherence to the new.air permit when it is final. MDH will continue to monitor new toxicological information for t-DCE to ensure the MDH air Risk Assessment Advice is protective of public health. Conclus.ion.3: Groundwater contam1nation.is not. expected to harm people's health Basis for Conclusion 3: Municipal -drinking water in White Bear Lake and White Bear Township is not affected by Water.Gremlin groundwater contamination. 1;4-13ioxane was detected below the MDH HRL in m.u.nicipaI wells in Vadnais Heights, from an unknown source. There are private we] 1s in Gem Lake contaminated with 1;4-dioxane above.MDH's HRL, but the concentrations of 1,4-dioxane are low and not expected. to result in health effects. Households with wells with 1,4-dioxane concentrations. exceeding the HRL have been notified.and are provided bottledwaterto limit exposure, The source of the Gem Lake contamination is also unknown. Nex.t Steps/Recommendations: Water Gremlin is responsible foe defining the extent and magnitude of the groundwater contamination from releases or threatened releases from their facility. MDH recommends MPCA.continue to investigate the source of the 1,4-dioxa.ne groundwater contamination found in Gem Lake private wells and the. Vadnais Heights municipal wells. MPCA and MDH will continue to sample private.wells and provide bottled water ms .needed to well owners with contamination above the HRLfor 1,4-dioxane. Conclusion:4: Soil vapor contaminat"ion is nota risk at. properties.near Water Gremlin:. Basis. for Conclusion 4: TCE and t-DCE Were found at high levels in soil vapor.beneath th6 Water Gremlin facility and.a mitigation system was. installed to protect workers. Soil vapor sampling around the facility show that high levels of vapors are not migrating to neighboring homes. Conclusion 5: Soil, sediment, ands urface water contamination from Water Gremlin does not pose a. health risk to the community. Basis for Conclusion S: The areas of soil contamination at Water Gremlin have been defined and are limited to the. company's.property..Water Gremlin operations have contributed to lead concentrations in sediments, particularly in samples from wetlands nearest the facility to the east and southeast. There is expected to be little to no human exposure to the lead in these sediments: Water Gremlin operations have contributed to lead and 1;4-dioxane in stormwater porids.and other surface waters on the company's property, but there is expected. to be little to no human exposure to these surface water bodies. Currently, there is.not enough Ihformation:to determine whether past transport of 1,4-dioxane in surface water may have contaminated the groundwater. 51