A private school in Greenwich, Connecticut, wanted to expand its nursery through ninth grade facilities by building a high school for 550 students. E.E. Cruz won the general contractor bid, and Mark Lancor, P.E., principal engineer at DYMAR in Southbury designed the 10,000-gpd onsite system.
“The site has soils with low permeability, shallow depths to ledge and a seasonal high water table at 18 inches below grade, ruling out a conventional subsurface drainfield,” Lancor says. Some of his design included a grease interceptor, five septic tanks, a membrane bioreactor with ZeeWeed 500Ds cassette module (SUEZ Water Technologies & Solutions), four pump
