How do I know if I have a reportable quantity of a hazardous substance? OSFM Community Right to Know October 06, 2020 20:34 Updated Follow You can also download the attached PDF for reporting quantity requirements. 2018-ReportableQuantities.pdf 100 KB Download Related articles Reportable Quantities What is a substantive change? How do I know if a chemical is an Extremely Hazardous Substance or has a Lower Reporting Level? Reporting Contiguous Sites How do I know if I need to have a Risk Management Plan Number (RMP#)?