The Trump National Gulf Club in Colts Neck, N.J., opened in 2005, but the onsite treatment system wasn’t completed until September 2008. Permitting for the drainfield, a pilot project and one of the largest in the state, took years.The state Department of Environ-mental Protection (DEP) requires groundwater discharge to meet coliform, pH and total nitrogen limits. Therefore, Gregg Barkley, P.E., of VanCleef Engineering in Hamilton, N.J., chose UV disinfection and an ultrafiltration system that uses thin, hollow membrane strands. Run by a computer, the complex treatment train is cost-effective, surpasses discharge limits and requires minimum maintenance.Site conditionsSoils are sandy loam
