The admission into the public sewers of any water or wastes having:
(A) Biochemical oxygen demand (BOD) greater than 300 mg/l.
(B) Chemical oxygen demand (COD) greater than 900 mg/l, or
(C) Suspended solids in excess of 300 mg/l, shall be subject to the review and approval of the Director.
Where necessary, in the opinion of the County, the owner shall provide at his expense such preliminary treatment as may be necessary to reduce the BOD to 300 mg/l, the COD to 900 mg/l, and the suspended solids to 300 mg/l. Plans, specifications and other pertinent information relating to the proposed preliminary treatment facilities shall be submitted for approval of the Director and of the Nevada Environmental Protection Agency, and no construction of such facilities shall be commenced until said approvals are obtained in writing.