The April 11 meeting plans to address quarterly air testing, site-wide investigation results and proposed next steps.

The Missouri Department of Natural Resources is holding a public availability session next week to update the community on the indoor air quality investigation in homes located near 221 Sunset Drive.

This Camdenton location was once the site of Modine Manufacturing and is under an ongoing Corrective Action Abatement Order on Consent with DNR in regards to trichloroethane (TCE) exposure and contamination of and near the facility.

The availability session will begin at 6 p.m., Tuesday, April 11, at the Camdenton High School Commons area, 662 Laker Pride Road, Camdenton.

DNR officials will share the quarterly residential indoor air sampling program results, site wide investigation results and the proposed next steps during the meeting. The Missouri Department of Health and Senior Services will also be available to discuss potential health concerns regarding the results of the quarterly residential indoor air sampling program and site wide investigation.

This is an opportunity for anyone who is interested to ask questions, share information, and discuss issues one-on-one with the agencies, Modine representatives and their contractor, according to DNR. The public may come by the high school any time between 6 and 8 p.m. Individuals requiring special services or accommodations in order to attend the session can make arrangements by contacting Amy Poos at least 72 hours before the meeting at 573-751-3553 or 800-361-4827 or by email at amy.poos@dnr.mo.gov. Hearing- and speech-impaired individuals may reach Poos through Relay Missouri at 800-735-2966.

The indoor air quality investigation, which began early December 2015, was the subject of a previous public meeting the department held in March 2016, which left many residents with questions.

The March 2016 meeting started with a presentation from Christine Kump-Mitchell, P.E., DNR, who assured citizens that the City of Camdenton drinking water is safe and indoor air levels are below health levels of concerns based on the first round of testing.

In March 2015, Modine and its contractor, CH2M Hill, began onsite/facility indoor air, outdoor air and gas sampling beneath the building and results showed concentrations in air above applicable screening levels. Kump-Mitchell said the plan was to continue further testing of residential and exterior vapor intrusion sampling around the residential areas surrounding the site.

Based on the collected samples along northern and eastern property boundaries, the highest concentrations were on the eastern side next to a sewer manhole. Based on those results, DNR requested residential testing for indoor air and sub-slab soil gas sampling north of the facility on Sunset Drive and east on Mulberry Drive and other nearby homes close to the sewer line.

The Modine Manufacturing site, previously owned by Sundstrand Tubular Products, is located next to a residential neighborhood in Camdenton. Modine Manufacturing Co. is conducting investigations of contaminant releases at the facility under the Corrective Action Abatement Order on Consent with DNR. The department’s Hazardous Waste Program, Permits Section is providing oversight of these activities.

Earlier investigations focused on soil contamination at the 69-acre site. According to DNR, due to advances in science and the understanding of potential health effects associated with vapors released from soil and groundwater contaminated with volatile organic compounds, the focus has shifted to investigating vapors inside the manufacturing building and nearby residential homes.

Hamilton-Sundstrand, parent company of former Sundstrand Tubular Products, is addressing related groundwater contamination issues with the Hulett Lagoon and Mulberry Well under a Cooperative Letter of Agreement with the department. The department’s Hazardous Waste Program, Superfund Section is providing oversight for these activities.

Degreasers in the former manufacturing processes at the site used TCE, a once common practice.

“Sites all across the country are dealing with volatile organic compounds, it’s happening in communities all over and it’s a real concern,” Michelle Hartman of Missouri Department of Health and Senior Services Bureau of Environmental Epidemiology said at the meeting last year. “We’re not concerned about ground water or soil exposures, we’re only concerned about potential exposures that might affect someone’s air in their home or business. Only exposure we’re worried about is inhalation of volatile organic compounds, chemicals that readily evaporate in the air.”

Long-term exposure concerns included potential effects to the immune system and potential increased risk for certain cancers: liver, kidney and non-Hodgkins lymphoma. Short-term exposure concerns at suffice doses is now of immediate concern with TCE due to the potential for fetal heart malformations, according to DNR.