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RETROSPECTIVE MONITORING OF INORGANIC MATERIALS
Citation:
Tuthill, C., W. Schutte, AND C. Frank. RETROSPECTIVE MONITORING OF INORGANIC MATERIALS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/3-81/002.
Description:
The development of chronological reference points to which present levels of inorganic pollutants can be compared is increasingly needed. The requirements for retrospective monitoring methods are discussed in relation to their attainability. The literature has been reviewed for biological samples which are datable and have been characterized for one or more inorganic chemicals. These data are evaluated with respect to their known or estimated past exposures. It is concluded that only selected repository samples and tree rings appear to fulfill the requirements for retrospective monitoring materials.