The W.R. Grace facility in Phoenix, Arizona, received vermiculite concentrate from the Libby, Montana, vermiculite mine. W.R. Grace Company has owned and operated the Arizona site since 1964. In 1964 W.R. Grace purchased the company that had previously occupied the site and, following the relocation of its vermiculite exfoliation furnace from Glendale, Arizona, began processing vermiculite concentrate and marketing it under the Zonolite® brand. The objective of this health consultation is to evaluate exposure pathways and potential health effects in those persons who, between 1964 and 2002, may have been exposed to Libby asbestos as a result of vermiculite concentrate processing activities and waste materials from the W.R. Grace exfoliation facility in Phoenix.

The purpose of this health consultation is to evaluate the air monitoring conducted by the Arizona Department of Environmental Quality at Mary McLeod Bethune School (Phoenix, AZ) and evaluate the potential impact on public health. The air monitoring data includes particulate matter and metals. The ADEQ’s primary objective of this air sampling is to provide an understanding of the hazardous air pollutants in the Phoenix area.

St. Luke's Health Initiatives and the Flinn Foundation strive to make Arizona a better place to live for all of its residents. Despite our state's assets, Arizona has many issues to address, with health and poverty among the most important. Our organizations have been pleased to sponsor the state capacity research that provided the background and impetus for "More Promises to Keep: Sustaining Arizona's Capacity for Welfare and Health Reform." St. Luke's Health Initiatives and the Flinn Foundation view the information and analysis provided in this report as a good way to stimulate discussion of health and welfare policy options and community actions. Research and dialogue are essential steps in the process of constructive change, as is communication with the public. We urge readers to consider the ideas presented in this paper and to continue to work together to improve the health and welfare of all Arizonans.