Table 2 . Any other solid waste not regulated as any of the above. Each category can be further subdivided. Table 3 summarizes the number of permitted solid waste facilities that submitted data reports to IDEM during 1998. Table 3 .
Some facilities are captive sites.
All facilities are captive sites. Coal combustion by-products comprise the largest portion of the waste tonnage disposed at restricted waste landfills. Like restricted waste sites, nonmunicipal solid waste landfills can accept only materials specified in their landfill permits. But nonmunicipal solid waste landfills have more stringent design standards than restricted waste sites. All of Indiana's nonmunicipal solid waste landfills are currently captive facilities and therefore, are not available for public use.