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Instructions to County Agricultural Commissioners on Rice Pesticide Permit Issuance, Continued Seepage Mitigation Requirements Seepage defined For purposes of mitigating seepage in rice production: • Seepage is lateral movement of irrigation water through a rice field levee or border to an area outside the normally flooded production area. Seepage can occur through levees into adjacent diy fields or into adjacent drains and canals. Seepage DPR requests that county agricultural commissioners (CRCs) continue documentation monitoring for seepage when inspecting for water -holding compliance by: • Checking for seepage, or collection of seepage, that occurs through the outer borders of a field or the bottom border located at the lowest part of the field. • Using the water -holding inspection logs to document seepage observations. The Pesticide Use Monitoring Inspection Form (PR-ENF- 104) may also be used to document seepage observations. Enforcement Any visible seepage moving offsite during the water -holding period that action drains into the waters of the State is considered an early release and is a water -holding violation. An enforcement action should be taken in accordance with 3 CCR section 6128. Brochure Please continue to distribute the brochure, Seepage Water Management, Voluntary Guidelines for Good Stewardship in Rice Production, Publication 21568, to growers at the time of permit issuance. Drift Minimization Requirements Mitigation • DPR will provide "focused" oversight inspection of thiobencarb aerial measures applications to monitor thiobencarb drift mitigation requirements. • DPR recommends all rice pesticide permits be conditioned with General Drift Minimization restrictions. Continued on next page D-3 (Rev. 8-18)