Kaloko-Honokohau National Historical Park, Hawaii.

The site presented formidable engineering challenges: proximity to the ocean, hard volcanic rock, and groundwater just two feet below the surface.

Working with NPS personnel, ACS installed an attractive prefabricated building that features a low-gradient ramp to provide handicapped access to the two odorless, zero-discharge Phoenix composting toilets.

The facility ended a nightmare for the park’s managers and visitors. In the absence of a public toilet, the trail to the park;’s isolated, but popular, beach was strewn with human feces — a sanitation nightmare and aesthetic disgrace.