Speaker: Ed Matthiesen & Diane Spector
Affiliation: Wenck Associates

UCLA Civil & Environmental Engineering Department


C&EE 200 Section 2 Seminar

Environmental and Water Resources Engineering

Biochar/iron/sand filters to remove bacteria and nutrients in an urban watershed


Ed Matthiesen, P.E.

Principal Engineer, Wenck Associates

Diane Spector

Principal Water Resources Planner, Wenck Associates


So your stormwater runoff is polluted with bacteria…now what? In urban areas bacteria sources are diffuse –pet and wildlife waste, sanitary overflows and leakages – and options for reducing loads are limited. This presentation will discuss the use of biochar, iron and sand filters to remove bacteria and phosphorus from urban runoff in a watershed in the Minneapolis metropolitan area. Catch basin inserts, pond filter benches and a filter box were installed and stormwater inflow and outflow were monitored for one to two years. Preliminary results and future monitoring plans will be discussed.

Where:   4275 Boelter Hall Room

When:     11:00 AM – 12:00 PM, Thursday, February 15, 2018


Ed Matthiesen, P.E. is a Principal Engineer for Wenck Associates, a Minneapolis environmental engineering firm. Ed has 30 years of extensive experience in water resources and environmental engineering. His water resources experience includes being the District Engineer for three Twin Cities area watershed districts and four Joint Powers Associations, writing municipal comprehensive stormwater plans, designing stormwater management BMPs, developing water quality protection plans, and hydrologic and hydraulic modeling. He has an MCE from the University of Minnesota and an MBA from the University of St. Thomas.


Diane Spector is a Principal Water Resources Planner and Scientist at Wenck Associates with a 0ver 20 years’ experience  in watershed and local water management and planning, environmental policy, planning and analysis, stream assessments and stressor identification studies, and TMDL and diagnostic studies. She has an MS in Environmental Science and Policy from UW-Green Bay.

Date(s) - Feb 15, 2018
11:00 am - 12:00 pm


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