An existing ISDS may be replaced with an ISDS designed for the same sewage load, including the same tank size, even if the lot does not meet the size requirement established as specified in Env-Wq 1008.02(a), provided that:

1. (a) The existing ISDS is a state-approved system installed after the applicable date in Env-Wq 1003.11(a); and
2. (b) The sewage load has not increased and is not proposed to increase.

Source. #14486, eff 2-1-26, EXPIRES: 2-1-36