246-272A-0280  <<  246-272A-0290 >>   246-272A-0300

Expansions.

(1) The local health officer shall require an OSS and a reserve area in full compliance with the new system construction standards specified in this chapter for an expansion of a residence or other facility.
(2) A local health officer may allow expansion of an existing on-site sewage system adjacent to a marine shoreline that does not meet the minimum horizontal separation between the soil dispersal component and the ordinary high-water mark required by WAC 246-272A-0210, Table IV, provided that:
(a) The system meets all requirements of WAC 246-272A-0230, 246-272A-0232, 246-272A-0234, and 246-272A-0238;
(b) The system complies with all other requirements of WAC 246-272A-0210 and this section;
(c) Horizontal separation between the soil dispersal component and the ordinary high-water mark is fifty feet or greater; and
(d) Vertical separation is two feet or greater.
[Statutory Authority: RCW 43.20.050. WSR 05-15-119, ยง 246-272A-0290, filed 7/18/05, effective 7/1/07.]
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