Or. Admin. R. 340-073-0040 - Drop Boxes

Current through Register Vol. 60, No. 12, December 1, 2021

(1) Drop boxes must be constructed of concrete, fiberglass, or other materials acceptable to the department.
(2) Drop boxes must be constructed of durable, watertight materials resistant to deterioration and be designed to accommodate watertight connections for the effluent sewer and header pipes. The top, walls, and bottom of concrete drop boxes must be at least 1-1/2 inches thick. All drop boxes must be able to support an earth load of at least 200 pounds per square foot.
(3) The inverts of the inlet and overflow port must be at the same elevation. The invert of the header pipe port(s) leading to the absorption trench(es) must be 6 inches below the inlet invert.
(4) Drop box covers must be marked with the manufacturer's full business name or number assigned by the department.
(5) Each manufacturer must provide the department with complete, detailed plans and specifications of the drop box and must certify, in writing, that drop boxes manufactured for use in onsite systems in Oregon will comply with all requirements of this rule. Plans and specifications must be prepared under the supervision of and designed by a professional engineer licensed in accordance with ORS Chapter 672.


Or. Admin. R. 340-073-0040
DEQ 10-1981, f. & ef. 3-20-81; DEQ 27-1994, f. 11-15-94, cert. ef. 4-1-95; DEQ 11-2004, f. 12-22-04, cert. ef. 3-1-05

Stat. Auth.: ORS 454.625 & 468.020

Stats. Implemented: ORS 454.615

The following state regulations pages link to this page.

State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.