I would recommend asking my grad school mentors: Dr. Bryan W. Brooks and Dr. E. Spencer Williams.
Dr. Brooks was my Ecological Risk Assessment professor and wrote the Ecological Risk portion of my paper published in Reviews of Environmental Contamination and Toxicology, and is well known for his research in pharmaceuticals in waste water effluent, as well as stormwater. [email protected]
Dr. Williams wrote the Human Health Risk portion of my paper and is well known for his work in coal tar sealant wash off in stormwater. [email protected]
If you're ever in need of an urban stormwater model, I would recommend WinSLAMM, developed by Dr. Robert Pitt. Www.winslamm.com