|
Activity Number:
|
274
|
|
Type:
|
Contributed
|
|
Date/Time:
|
Tuesday, August 4, 2009 : 8:30 AM to 10:20 AM
|
|
Sponsor:
|
Section on Statistics and the Environment
|
| Abstract - #305739 |
|
Title:
|
USEPA's Targeted National Sewage Sludge Survey
|
|
Author(s):
|
Marla D. Smith*+ and Rick Stevens
|
|
Companies:
|
U.S. Environmental Protection Agency and U.S. Environmental Protection Agency
|
|
Address:
|
1200 Pennsylvania Ave, NW (4303T), Washington, DC, 20460,
|
|
Keywords:
|
environment ; pollutant ; national estimates
|
|
Abstract:
|
As required by the Clean Water Act, the U.S. Environmental Protection Agency (EPA) is working to understand potential pollutants in sewage sludge and in the environment. Because many chemicals tend to accumulate in sewage sludge during wastewater treatment, EPA initiated the Targeted National Sewage Sludge Survey to characterize what chemicals may be present in sewage sludge. The survey also provides the first national estimates of which pharmaceuticals, steroids and hormones may be present in sewage sludge and at what concentrations. The national estimates are based upon concentrations found at 74 sewage treatment plants that statistically represent over 3,300 of the nation's largest plants. This presentation will discuss the statistical challenges in selecting the plants for the survey and analyzing the concentration data.
|
