WAC 246-272A-0290. Expansions

(1) The local health officer shall require an OSS and a reserve area in full compliance with the new construction standards specified in this chapter for an OSS expansion. (2) A local health officer may allow expansion of an existing OSS within 200 feet of 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 OSS meets all requirements of WAC 246-272A-0230 , 246-272A-0232 , 246-272A-0234 , and 246-272A-0238 ; (b) The OSS 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 50 feet or greater; and (d) Vertical separation is two feet or greater.