Sites contaminated by hazardous materials or wastes. These sites are those administered by the Contaminated Sites Section of Iowa DNR. Many are sites which are assessed for contamination when property is sold; and others may actually have contamination and may or may not have been remediated. For example, it includes sites for Brownfields, CERCLA Preremedial and Remedial, Chapter 133, and the Land Recycling Program. It does not include RCRA sites which are administered by EPA, or Leaking Underground Storage Tank (LUST) sites (with petroleum contamination) which are administered by the Iowa DNR LUST Section.