WAC 173-304-450   Landspreading disposal standards.  (1) Applicability. These standards apply to facilities that engage in landspreading disposal of solid wastes. These standards do not apply to:

     (a) Facilities utilizing sludge, woodwaste or other primarily organic sludges according to the Municipal and Domestic Sludge Utilization Guidelines WDOE 82-11, specified in WAC 173-304-300 (4) and (5);

     (b) Agricultural solid wastes resulting from the operation of a farm including farm animal manure and agricultural residues; and

     (c) Inert wastes and demolition wastes.

     (2) Owners or operators of landspreading disposal facilities shall meet the minimum functional standards for performance of WAC 173-304-460(2) and the general facilities standards of WAC 173-304-405.

     (3) Owners or operators of landspreading disposal facilities shall meet the locational standards of WAC 173-304-130.

     (4) Minimum functional standard for design. Owners or operators of landspreading disposal facilities shall design landspreading facilities so as to:

     (a) Provide interim waste storage facilities that meet the requirements of WAC 173-304-400 standards (i.e., for piles, surface impoundments, etc.);

     (b) Collect and treat all runoff from a twenty-four hour, twenty-five year storm, and divert all run-on for the maximum flow of a maximum twenty-five year storm around the active area;

     (c) Avoid standing water anywhere on the active area;

     (d) Avoid slopes and other features that will lead to soil and waste erosion, unless contour plowing or other measures are taken to avoid erosion;

     (e) Monitor groundwater according to WAC 173-304-490; and

     (f) Control access to site by fencing or other means and erect signs.

     (5) Minimum functional standards for maintenance and operation. Owners or operators of landspreading disposal facilities shall maintain and operate the facilities so as to:

     (a) Avoid any landspreading disposal of garbage or medical waste;

     (b) Analyze solid wastes according to the requirements spelled out in the Municipal and Domestic Sludge Utilization Guidelines WDOE 82-11;

     (c) Avoid applying wastes at rates greater than ten times agronomic rates using the proposed cover crop, or depths greater than would allow for discing the soil by tracked vehicles;

     (d) Provide discing of soils during the growing season and after each application of waste to maintain aerobic soil conditions, minimize odors and lessen runoff;

     (e) Avoid applying waste to any active area having standing water;

     (f) Conform to the operating plan and the requirements of WAC 173-304-405;

     (g) Avoid food chain crops during the active life of the facility and until demonstrated to be safe, after closure, according to the closure and post-closure plans filed with the plan of operation. Specific approval in writing from the jurisdictional health department is required for any landspreading disposal facility that is used to raise food crops after closure. Any new owner or operator of a closed landspreading disposal facility shall notify the jurisdictional health department within sixty days of the purchase; and

     (h) Provide for a written contract between landowners, waste generators, waste haulers and waste operators requiring compliance with rules as a condition of the contract.

     (6) Minimum functional standards for closure.

     (a) All owners or operators of landspreading disposal facilities shall close in such a manner as to comply with WAC 173-304-407;

     (b) Financial assurance. All owners or operators of landspreading disposal facilities shall have a written estimate, in current dollars, of the cost of closing the facility. The closure cost estimate must equal the cost of closure at the point in the operating life of the facility when the extent and manner of operation would make closure the most expensive, as indicated by the closure plan.

     In addition, all facilities shall have a written post-closure estimate, in current dollars, the cost of post-closure monitoring and maintenance during the post-closure period.



[Statutory Authority: RCW 70.95.215. 88-20-066 (Order 88-28), § 173-304-450, filed 10/4/88. Statutory Authority: Chapter 43.21A RCW. 85-22-013 (Order 85-18), § 173-304-450, filed 10/28/85.]