Introduction
Increasing concern about sources of perchlorate contamination in ground and
surface waters has led to interest in identifying potential sources of natural perchlorate
and products derived from these natural sources. To date, most perchlorate found in
ground and surface waters has been attributed to its major uses as an oxidizer in solid
propellants for rockets, in fireworks and other explosives, and a variety of other uses of
man-made perchlorate salts. However, perchlorate found in the soils, surface water,
and ground water of some locations cannot be linked to an anthropogenic source. This
paper contains preliminary data on the detection and non-detection of perchlorate in a
variety of natural materials and their products, including some fertilizer materials.
These data were previously presented at two conferences; once in poster session and
once orally (Harvey and others, 1999; Orris and others, 2000). Although the results
presented here are included in a journal article awaiting publication, the lack of public
information on this topic has led to repeated requests for the data used as the basis for
our presentations in 1999 and 2000.
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First posted September 5, 2003
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