WAC 246-272B-05000. Installer qualifications and responsibilities

The installer shall: (1) Be currently approved by the local health jurisdiction in the county where the LOSS is to be constructed. (2) Have the following experience: (a) Three or more years experience installing OSS; or (b) A record of successful completion of at least one similar installation, including a pressure distribution drainfield. (3) Maintain a copy of approved plans and specifications on-site during construction; (4) Follow the approved plans and specifications or obtain approval from the design engineer prior to making field changes; (5) Install sewage tanks approved by the department according to the provisions of chapter 246-272C WAC, On-site sewage system tanks; (6) Be on the site at all times during the excavation and construction of the LOSS; (7) Backfill and grade the site after construction to prevent surface water from accumulating over any LOSS component; and (8) Leave the drainfield lines uncovered until the drainfield passes the department's final inspection. Driplines may be covered prior to inspection.