(A) A facility that meets either of the following criteria is subject to emergency planning requirements of section 3750.05 of the Revised Code:
(1) Which has an extremely hazardous substance present in an amount equal to or exceeding the threshold planning quantity as established under rule 3750-20-10 of the Administrative Code.
For purpose of this rule, an amount of any extremely hazardous substance means the total amount of an extremely hazardous substance present at the facility at any one time in concentrations greater than one per cent by weight, regardless of location, number of containers, or method of storage.
(2) Which has been designated as an additional facility pursuant to section 3750.05 of the Revised Code.
(B) For purposes of this rule nothing herein shall exclude or excludes an agricultural producer otherwise subject to the requirements of paragraph (A)(1) or (A)(2) of this rule.