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  1. The release of the particulate poses a public health hazard. Analysis of the data indicates that respirable particle levels in the plume were significantly higher than in the ambient air (Table 1). The quantity of particles discharged from the cyclone at U. S. Architectural constitute a violation of ADPC&E Regulation 18, Section 18.5a, which regulates visible emissions from a facility. (5)

  2. The ability of MDF particles to release formaldehyde into the body is not well understood. Formaldehyde exposure from inhalation or dermal contact with MDF particles, and any resultant potential health effects, is indeterminate. If the facility continues to discharge significant amounts of particulate matter into the air, ADH will attempt to quantify the amount of formaldehyde in the MDF particles to determine the potential for resultant adverse health effects. A nuisance problem exists at businesses adjacent to U. S. Architectural because of the large volume of particles which are being deposited on their facilities.

  3. A potential fire hazard exists in the manufacturing area of the U. S. Architectural facility due to the large amount of dust and particle fibers on the floor and the heat generated from the infrared paint drying process.


  1. An appropriately designed bag house should be installed following the cyclone to adequately control air emissions. (At this time installation of a baghouse has begun.)

  2. Particulate measurements should be collected downwind from the U. S. Architectural cyclone following installation of the baghouse to determine if emissions are being adequately controlled.

  3. An air emission control permit should be obtained from the Arkansas Department of Pollution Control and Ecology so that air emissions from the facility will be adequately regulated in the future.

  4. Consultative assistance from the Hazard Evaluation and Technical Assistance Branch of the National Institute of Safety and Health (NIOSH) should be requested by U. S. Architectural to alleviate the health and safety problems within the manufacturing area of the facility.

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Agency for Toxic Substances and Disease Registry, 4770 Buford Hwy NE, Atlanta, GA 30341
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