Section R. 285.640.6 - Venting requirementsRule 6.
(1) Each storage container that is used for bulk liquid pesticide shall be equipped with a vent that has a hood or an inverted opening.(2) Conservation vents shall be used on containers that store products where loss of vapor affects product quality or where the vapor is harmful to plants, animals, or humans.(3) Conservation vents shall open and close within the designed pressure limits of the storage container.(4) Full compliance with the provisions of this rule is required 90 days after the effective date of this rule.Mich. Admin. Code R. 285.640.6