Section NR 811.78 - Water loading stationsWater loading stations shall comply with the requirements of this section to prevent contamination of both the public water supply and potable water vessels being filled.
(1) There may be no backflow or backsiphonage to the public water supply. Either a free air break shall be provided as shown in Figure No. 11 in the Appendix or alternatively, a reduced pressure principle backflow preventer shall be installed on the water loading piping. Cross connection control shall be provided to meet the requirements of s. SPS 382.41.(2) The piping arrangement shall prevent contaminants from being transferred from a hauling vessel to others subsequently using the station.(3) Hoses may not be contaminated by contact with the ground.Wis. Admin. Code Department of Natural Resources § NR 811.78
CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; correction in (1) made under s. 13.92(4) (b) 7, Stats., Register December 2011 No. 672.It is recommended that a water meter be installed on the piping at all water loading stations to record water usage. It is also recommended that a free air break be installed in place of installing a reduced pressure principle backflow preventer.