Section 444.810 - Coated steel septic tanks1. Coated steel septic tanks must be made of commercial grade sheet steel of good welding quality and must have a bituminous coating applied in accordance with subsection 2. Only new materials may be used, and the thickness of the sheet must be Number 12 manufacturer's standard gage (.109 inches) or heavier. The tanks must be so constructed as to withstand all anticipated earth or other loads.2. The coating must be composed of bituminous-base materials that are impervious to water and resistant to sulfuric and sulfurous acids of concentrations encountered in the normal operation of septic tanks. The coating systems which are acceptable must be applied as follows:(a) A hot-dipped asphalt coating may be applied to the bare metal or over an asphalt primer, followed by a coal-tar-base emulsion coating applied to all interior surfaces of the tank above a level at least 8 inches below the invert of the outlet pipe.(b) A cold-application, coal-tar-base coating may be applied to the bare metal or over a coal-tar-primer, followed by a second application of the coating to all interior surfaces of the tank above a level at least 8 inches below the invert of the outlet pipe.Nev. Admin. Code § 444.810
Bd. of Health, Indiv. Sewage Disposal Systems Reg. §§ 12.6.14-12.6.14.2, eff. 11-23-72-NAC A by R129-98, 3-25-99