To ensure any Existing handling and storage of a dense non-aqueous phase liquid for industrial, commercial, institutional or agricultural purposes ceases to be a significant drinking water threat, where this activity is a significant drinking water threat, this activity is designated for the purpose of Section 58 of the CWA and a Risk Management Plan is required where the following apply:

a. Any quantity of dense non-aqueous phase liquid in a WHPA-A, WHPA-B or IPZ-1, with a vulnerability score of ten (10), including within an ICA for trichloroethylene (TCE); or
b. Any quantity of the following chlorinated solvents in a WHPA-B or WHPA-C, with a vulnerability score less than ten (10), including within an ICA for trichloroethylene, or within a WHPA-D in an ICA for trichloroethylene:
• Dioxane-1,4
• Tetrachloroethylene (PCE)
• Trichloroethylene or another DNAPL that could degrade to Trichloroethylene
• Vinyl chloride or another DNAPL that could degrade to vinyl chloride; or
c. 25 Litres or greater of Poly Aromatic Hydrocarbons (PAHs) in a WHPA-B or WHPA-C, with a vulnerability score less than ten (10), including within an ICA for trichloroethylene, or within a WHPA-D in an ICA for trichloroethylene.

WC-CW-1.11: The Risk Management Official shall provide a report to the Source Protection Authority, by February 1st of each year, summarizing the actions taken by the Risk Management Official to implement the Source Protection Plan policies, in accordance with the Clean Water Act, 2006 and associated regulations.