Spray irrigation fields

(a) Location. All spray irrigation fields shall: (1) be preceded by an aerobic treatment unit; (2) be located in the identified dispersal site, when a soil profile test is used to sized the irrigation field; (3) utilize at least two sprinkler heads to disperse the treated effluent; and (4) be vegetated and landscaped, and/or terraced to prevent runoff. (b) Sizing. The spray irrigation field shall be sized according to Appendix H, Figures 13-22. When calculating the overall area of the spray irrigation field, areas of overlap may only be counted once. (c) Sprinklers. The sprinklers shall be designed to: (1) provide uniform distribution of treated effluent over the entire spray irrigation field without misting; and (2) have a trajectory of no more than fifteen-degrees (15) to keep the spray stream low to the ground surface. (d) Spray irrigation. The spray irrigation shall be: (1) adjusted and maintained at a rate to prevent runoff; and (2) controlled by a timing device to take place daily between 1:00 a.m. and 6:00 a.m. SUBCHAPTER 15. LAGOONS