Information for Wisconsin
Wisconsin does not have established regulations. They recommend the EPA guidelines for decontamination procedures with a clearance goal of 1.5ug/100cm², which was promoted in the EPA guidelines. They do have a DNR Emergency Zone Contract program to help assist in the clean up of hazardous substance contamination. They also have a publication on Cleaning Up Hazardous Chemicals at Methamphetamine Laboratories for more information.
Wisconsin Department of Health Services, Bureau of Environmental and Occupational Health
1 West Wilson St Box 2659, Madison WI 53701-2659
The DEA has kept a catalog of properties since 2004 across the nation of locations of clandestine meth lab busts completed by their department, check to see if your property is on their list:
EPA Voluntary Guidelines for Methamphetamine Laboratory Cleanup