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The following shall apply to existing uses located within the designated wellhead protection areas defined in LMC 14.36.030:

A. For any existing use identified by the contaminant source inventory in approved wellhead protection plans within the one-, five- and ten-year time of travel zones which produces, uses, stores, handles or disposes of hazardous materials, the owner, upon request of the health officer shall submit a hazardous materials management (spill) plan as described under LMC 14.36.160 that will ensure adequate protection of the source water supply. The health officer, in consultation with the water purveyor in which the use is located, shall review this plan to determine whether the plan shall be approved, or approved with conditions to ensure adequate protection of the source water supply.

B. The health officer at the health officer’s discretion, for good cause and with reasonable expectation of risk to ground water, may require pollution prevention plans and MPCs on any use proposed within the one-, five-, and ten-year time of travel zones.

C. For any existing agricultural use located within the designated one-, five- and ten-year time of travel zones, the owner, upon request of the health officer, at the health officer’s discretion, for good cause and with reasonable expectation of risk to ground water and with consultation with the Thurston Conservation District, shall develop a farm conservation plan in conformance with the U.S. Natural Resources Conservation Service Field Office Technical Guide and obtain approval of the Thurston Conservation District board of supervisors. (Ord. 1638 §17, 2023; Ord. 1505 §44 (part), 2017).