The metal casting industry generates spent foundry sands. Foundries purchase new, sand to make casting molds, and the sand is reused numerous times within the foundry. This reuse eventually renders the sand unsuitable for use in casting molds, and a portion of the sand is continuously removed and replaced with sand.
From the perspective of the foundry industry, the Microtox test is an unneeded hurdle that could potentially block the beneficial use of spent foundry sand. Cost is one consideration, but the lack of local analytical facilities for the Microtox is particularly troublesome.
The approach is as follows: 1) Develop background information and databases about foundry sand including: characteristics of the different kinds of foundries and the spent foundry sand they generate, state regulatory guidelines for beneficial use of spent foundry sand, and previous research on beneficial use of spent foundry sand.