The Arizona Department of Environmental Quality asked the Arizona Department of Health Services to evaluate the health threat to residents from exposures to ash fallout from a fire at an asphalt plant located on the Salt River Indian Reservation in Mesa, Arizona. The facility has recently been bought by Vulcan, Inc. The site is located just north of the Salt River between Dobson and Alma School Roads. April 13, 1999.

This report evaluates the potential exposure pathways associated with vermiculite concentrate processing activities at the Ari-Zonolite facility. The site is located in the near downtown area of Glendale, approximately ½ mile from the city hall, downtown shops, and other buildings. The former Ari-Zonolite facility received vermiculite from the Libby, Montana, mine. From 1951 to 1964, the site was leased the site to the Ari-Zonolite Company. Following the removal of the vermiculite concentrate processing equipment in 1964, several businesses have occupied the site. None of these businesses were involved in vermiculite processing activities. The last occupant of the former vermiculite processing building was an automotive restoration business, which vacated the site in 2002.

The purpose of this report is to document the evaluation of the public health effects of the air emissions from the Central Garden and Pet Supply Warehouse fire that was verbally provided during the response efforts to the fire event. The facility contained a variety of lawn and garden supplies including pesticides, herbicides, and pool maintenance chemicals. The fire also involved a portion of a pharmaceutical supply firm which contained medical supplies ranging from liquid and pill-form medicines to sterile syringes and other physical supplies.