A discussion of the prior use of any hazardous substances on the land. Such discussion shall describe the extent, if any, of the prior use of hazardous substances on the land for manufacturing or related processes, storage, treatment and disposal for a previous period of not less than 25 years from the date in which the application was filed nor more than 50 years. For the purposes of this chapter, hazardous substances shall mean those elements and compounds, including petroleum products, which are defined as such by the Department of Environmental Protection, inclusive of the list of hazardous substances adopted by the Environmental Protection Agency pursuant to Section 311 of the "Federal Water Pollution Control Act Amendments of 1972" (33 U.S.C. 1321) and the list of toxic pollutants designated by Congress or the Environmental Protection Agency pursuant to Section 307 of that act (33 U.S.C. 1317) except that sewage and sewage sludge shall not be considered as hazardous substance for the purposes of this section.