Preparing a Pollutant Loading Analysis for Land Development Projects

Presentation

Description: This workshop will show attendees how to prepare a pollutant loading analysis for projects. Sources for pollutant concentrations and removal efficiencies will be provided. Processes to calculate removal efficiencies for standalone and treatment systems in series will be presented. The importance of designing stormwater practices will be discussed. Full Presentation Abstract: Many municipal regulatory agencies are beginning to ask applicants to evaluate the effectiveness of the stormwater practices to reduce non-point source pollutant loads. There is a lot of confusion as to how to calculate the pollutant loads for land development projects as well as evaluate the effectiveness of treatment practices. For the past 50 years, it was common to use a single type of stormwater practice to provide peak rate attenuation as there was no need or focus to consider water quality impacts. The days of using a single stormwater practice are slowly being replaced by the concept of using multiple treatment practices in series to reduce non-point source pollutant loads.
There is a lack of understanding as to how you evaluate pollutant removal rates when there are multiple practices in a series. This workshop will cover the following information to provide tools to the design community to address this issue.

1. Pollutant Loading Analysis – What are they and why are they necessary?
a. Sources for non-point source pollutants.
b. Sources for pollutant removal efficiencies.
c. Equations for calculating pollutant loads and pollutant removal rates.
d. The importance of including all required components of a stormwater practice.
e. Mixing and matching different components in one system.
f. Standalone treatment systems, systems in series.
g. Using dry and wet systems to enhance removal rates of pollutants.
h. Determining pollutant loads removal efficiencies for systems in series.
2. Case Studies – The Good, The Bad and The Ugly