14 CAR § 20-105. Pretreatment requirements

(a)(1) The quality of effluent that will be applied to the dispersal field shall meet the American National Standards Institute/National Sanitation Foundation (ANSI/NSF) Standard 40, revised 2005, requirements for Class 1 treatment systems. (2) Only pretreatment units that have obtained approval from the Department of Health shall be used. (b) Pretreatment system shall be required as part of any drip dispersal system design. (c) The daily flow rate capacity of a pretreatment system shall equal or exceed the daily flow rates found in Appendix B of the Rules Pertaining to Onsite Wastewater Systems, 14 CAR pt. 21. (d) Pretreatment systems installed in conjunction with an individual residential structure shall have a daily flow rate capacity of not less than four hundred (400) gallons per day. (e) Pretreatment systems installation on nonresidential or multistructures shall be sized according to: (1) Influent wastewater strength; and (2) Total daily flow rate expressed in gallons per day.