In January 2012, I was asked to serve on an expert panel to review available science on the pollutant removal performance of treatment practices to derive nutrient removal rates for individual onsite wastewater practices. This ended up being a nearly two-year process culminating in a December 2013 workshop held in Washington, D.C.The practices in question were those currently in use or with the potential for use in the Chesapeake Bay watershed bordering Maryland and several other eastern states. The primary objective was to review documentation, and provide concise system definitions and percent reductions for nitrogen load reduction practices that could
