D4 Information Page Content D4 ApplicationsThe following PDF files include blank D4 application forms as well as a list of frequently asked questions.D4 GuidelinesD4 Study FAQD4 Individual Application FormD4 Commercial / Developers Application FormAnnual monitoring reports are available for some County active and closed landfill sites. For further details contact Customer Services at (705) 735-6901 or (800) 263-3199.To access a copy of the Ministry of the Environment D4 Guideline please visit http://www.ene.gov.on.ca/.