Citation:

Brown, R. AND Mike Borst. Water Quality Performance of Three Side-by-Side Permeable Pavement Surface Materials: Three Year Update . Presented at 2013 International Low Impact Development Symposium, Saint Paul, MN, August 18 - 21, 2013.

Impact/Purpose:

This is an abstract for a presentation to describe the water quality results from the EPA permeable parking lot in Edison, NJ.

Description:

Communities are increasingly installing structural low impact development (LID) practices to mange stormwater and reduce pollutant loads associated with stormwater runoff. Permeable pavement is a LID practice that has limited research on working-scale, side-by-side performance of different permeable pavement surface types. The existing studies commonly have small, short-duration datasets and are often limited to a single permeable pavement surface making it difficult to extrapolate and compare the results between surface types. In 2009, the U.S. Environmental Protection Agency (EPA) constructed a 0.4-ha (1-ac), parking lot at the Edison Environmental Center in Edison, NJ. The 110-space parking lot was surfaced with three different permeable pavement types [interlocking concrete pavers (ICP), porous concrete (PC), and porous asphalt (PA)]. Each permeable pavement surface type has four equally sized and spaced, lined sections that drain to 5.7-m3 (1,500-gal.) collection tanks that enable composite sampling for water quality analysis. Samples analyzed in this presentation were collected at roughly monthly intervals for more than two years. Samples from rainwater and asphalt runoff were also collected and analyzed to provide comparisons to the infiltrate. Some of the measured stressors that will be described include: nitrogen, phosphorus, chloride, heavy metals, and suspended solids. For many stressors, the concentrations varied significantly by surface material.

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