Oregon Administrative Rules
Chapter 340 - DEPARTMENT OF ENVIRONMENTAL QUALITY
Division 51 - CONFINED ANIMAL FEEDING OR HOLDING OPERATIONS
Section 340-051-0070 - Disposal Facilities and Practices

(a) When slurry is spread by tank wagon or truck, a predetermined plan of uniform coverage should be established and adhered to. Under no circumstances should a tank be drained when not in motion across suitable receiving land;

(b) Liquid manure irrigation systems should be operated according to a predetermined plan of rotation to insure uniform coverage and prevent prolonged ponding or surface runoff from excessive applications. Leaks and sprinkler head malfunctions should be repaired immediately;

(c) The selection of equipment for land disposal should be based upon land configuration, labor requirement, and long term dependability of the system and its components;

(d) Adequate land should be provided on a year-round basis for effective assimilation of all manure slurry applied, regardless of the method of application used. Land with poor vertical drainage characteristics, high water table or steep slopes should not be selected for use in a year-round plan of manure disposal;

(e) The vegetative cover on disposal land should be harvested or grazed regularly to prevent thatch accumulations of mature grasses and weeds;

(f) Livestock should not be permitted to graze the disposal area during periods of saturated soil conditions;

(g) Seepage basins should not be used except where it can be demonstrated that ground water pollution will not result.

(a) Field spreading of manure should be uniform in distribution and limited in quantity to the capacity of the land to retain it;

(b) Manure should not be stored or deposited where it can be washed into the surface drainage;

(c) Manure solids should not be used as a fill or land raising material where they will pollute ground or surface waters;

(d) All dead animals should be promptly collected and disposed of in an approved manner.