Section R. 324.1120 - Flow lines; markers; protectionRule 1120.
(1) A permittee of a well shall ensure that the routes of flow lines that are located before the point of sale and that are used for transporting fluids containing hydrogen sulfide are marked. Markers shall be mounted not less than 4 feet above ground level, shall consist of signs denoting the presence of a buried line carrying hydrogen sulfide, and shall contain the name of the flow line owner and the flow line owner's emergency telephone number. Markers shall be properly maintained and shall be spaced so that the route of the flow line can be easily traced. Routes shall be kept sufficiently cleared to allow adjacent markers to be visible with the naked eye.(2) A permittee of a well shall ensure that flow lines constructed above ground level are protected from accidental damage by vehicular traffic or other similar causes.Mich. Admin. Code R. 324.1120