(A) Computation of Stormwater Management Utility fee for commercial properties:
(1) Determine base rate to assign ERU;
(2) Determine the impervious area on the property;
(3) Calculate the numerical factor for the property in question by dividing the impervious area by one ERU (3,000 square feet); and
(4) Calculate the annual Stormwater Management Utility fee for multiplying the numerical factor by the base rate, if the factor is greater than one.
(B) Example calculation. Calculation of monthly fee for a one and one-half acre commercial property with a determined impervious area of 32,500 square feet.
(1) One ERU = 3,000 square feet.
(2) Property impervious area = 32,500 square feet.
(3) ERUs for example property = 32,500 square feet of impervious area/1 ERU of 3,000 square feet = 10.8 ERUs.
(4) Utility fee = ERUs x base rate = 1.8 ERUs x example base rat of $48.00 = $518.40/year.
(C) The classification of real property and the identification of the Utility customer for the purpose of determining fees shall be determined from the records of the Charleston County Tax Assessor. The Utility customer or person charged the fee is based on the classification of the real property as of January 1 of the year of billing and each year subsequently thereafter.
(D) Where the tax records are incomplete or ambiguous, a physical inspection of the real property shall be made to determine the use of the property. Upon development of the county’s database and review of the real properties on a case-by-case basis, the classifications from the Charleston County Tax Assessor do not preclude an adjustment to the data that the county uses to determine the fee.
(Ord. 2012-20, passed 11-15-2012; Ord. 2016-07, passed 7-21-2016)