Western Region Pesticide Meeting Air Monitoring Studies for Agriculture-Urban Interfaces. Carl A. Brown, Ph.D. Idaho Department of Environmental Quality. Outline. Purpose of study Background/Description of sites Preliminary Risk Screening Analysis Source identification 1, 3-DCP Wrap-up.
Carl A. Brown, Ph.D.
Idaho Department of Environmental Quality
Purpose of study
Background/Description of sites
Preliminary Risk Screening Analysis
Meridian – St. Luke’s
Boise – Mt View School
Nampa - NNU
SE Boise – White Pine
Every 6th Day
Remove species with low data quality
Determine maximum measured concentration
Compare maximum concentration to conservative benchmarks
Compare to conservative benchmarks: Carcinogens
1 in a Million Cancer Risk:
A risk level of 1 in a million implies a likelihood that 1 person, out of a population of one million equally exposed people would contract cancer if exposed continuously (24 hours per day) to the specific concentration over 70 years (an assumed lifetime).
After removing the compounds measured with a low confidence, the following species are the remaining contaminants of concern:
Mobile Source VOCs
based on peak 24-hour
loss of 7% of applied DCP: 1.62e-05 gm/m2-s
Modeled 1,3 DCP (g/m3) 40 acre Field 1st Day