Only 18 months after a small, two-story commercial building opened in October 2017, its 1,000-gpd drainfield failed. The building held offices and retail spaces in Hale‘iwa, Oahu, Hawai‘i.Samuel Morton of Gecko Enterprises pumped the septic tank every other day for six months, while system designer David Bills, P.E., of Bills Engineering in Honolulu, assessed alternatives. His solution increased the chambered drainfield from 1,200 to 1,700 square feet and its depth from 4 to 8 feet.In June 2019, Mike Cowper, the original installer and owner of Cowper Construction in Hale‘iwa, saw-cut the asphalt parking lot over the field and rebuilt it.
