Within Wellhead Protection Area B, where the vulnerability score is 10, any existing or future application of ASM or NASM where it is or would be a significant drinking water threat, is designated for the purpose of Section 58 of the Clean Water Act, and requires a Risk Management Plan. This includes, for example, but is not limited to the following:

a) Agricultural Source Materials (ASM) in any quantity,

b) the application of Non-agricultural Source Materials (NASM) where either:

i. the livestock density (according to livestock density mapping) is greater than 1 nutrient unit / acre, or

ii. the percentage of managed land is greater than 80%.

The Risk Management Official shall negotiate or establish a Risk Management Plan with the person engaged in the designated threat activity within five years of the Plan coming into effect. The RMP is to contain, at a minimum, structural or management alterations (if any) which when implemented will ensure that existing operations continue to function in a manner which minimizes the risk to sources of municipal drinking water. The RMP shall include terms and conditions which when implemented will ensure that existing operations continue to function in a manner which minimizes the risk to sources of municipal drinking water.  Where a farm operation does not have a Nutrient Management Strategy or NASM plan in place, a Nutrient Management Plan created on the OMAFRA NMAN software shall form the basis of the Risk Management Plan.