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heavy metal-contaminated fugitive dusts or if potable or nonpotable (i.e. , watering livestock or crops) uses of water from domestic wells near the site that were not sampled are resulting in human exposure. If it is determined that appreciable concentrations of fugitive dusts have been or are being transported via air, appropriate off-site surface soil and ambient air monitoring -- that considers the potential for heavy metal exposure to sensitive subpopulations (i.e. , children) -- are needed. PUBLIC HEALTH IMPLICATIONS No discussion of the public health implications of possible non-worker exposure to site-related contaminants can be offered at this time because of the lack of complete data and information related to the human exposure pathways. Current data and information related to exposure to contaminated groundwater indicate that humans are not being exposed to contaminants at concentrations above health-based levels; however, as indicated previously, there are insufficient data and information to completely eliminate the possibility of significant human exposure to groundwater contaminants. Kearney workers may have been exposed in the past to groundwater contaminants through ingestion of drinking water from plant drinking-water fountains and from inhalation of volatilized VOCs from water used in the manufacturing process. Based on monitoring data from 1986, several VOCs were found in production well water at concentrations above levels of long-term health concern. However, it cannot be determined with available information the length of exposure and the amount of contaminated water that individual workers may have consumed. In addition, on-site workers may be, or may have been exposed to heavy metal-contaminated fugitive dusts which may be, or may have been, present in ambient air. Additional ambient air and surface soil monitoring data, however, are needed to evaluate such potential human exposure before discussing the potential health effects. During conversations with Robert Schlag, California Department of Health Service, it was determined that because of the possible past and present worker exposure at the Kearney-KPF site, this site should be referred to the California Occupational Safety and Health Administration for followup (personal communication, September 24, 1990) . CONCLUSIONS 1. The Agency for Toxic Substances and Disease Registry considers this site an indeterminate public health hazard because the limited data do not indicate that humans are being or have been exposed to levels of contamination that would be expected to cause adverse health effects. However, data or information are not available for all environmental media to which humans may be, or may have been, exposed. 2. Kearney-KPF workers may have been exposed in the past to groundwater contaminants through ingestion of drinking water from plant drinking- water fountains and from inhalation of volatilized VOCs from water used in the manufacturing process; therefore, this site is being referred to the 10