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EPA Home > Region 5 > Air > Correspondence


February 6, 1998

Lloyd Eagan, Director
Bureau of Air Management
Wisconsin Department of Natural Resources
101 South Webster Street
P.O. Box 7921
Madison, Wisconsin  53707-7921

Dear Ms. Eagan:

This letter is in response to your letter of December 26, 1997, regarding the Annual Review of Wisconsin’s Air Monitoring Network and the subsequent meeting with the United States Environmental Protection Agency (USEPA), Region 5 staff on January 7, 1998, to discuss the contents of that letter.  As always, Region 5 is encouraged by the thorough job of network planning performed by the State of Wisconsin and the efforts undertaken to keep the USEPA informed of your network plans.

Region 5 is aware that during 1997 the TSP monitoring network was reduced by 21 monitors in order to restructure funds for the PM2.5 program.  We also approve the discontinuation of the Melendez PM10 site since the readings at the Cleveland PM10 site are similar to those at the Melendez site and because the Cleveland site is located in a more residential area.  We understand that the 1998 Wisconsin PAMS network is largely remaining the same as the 1997 network with the exception of VOC and carbonyl sampling at the Manitowoc site.  Both the Manitowoc and Harrington Beach PAMS sites are measuring low hydrocarbon concentrations and because these sites have had comparable readings, we are approving Wisconsin’s removal of VOC and carbonyl sampling at Manitowoc.  Region 5 acknowledges that elimination of the redundant hydrocarbon sampling will allow Wisconsin to sample for both NOy and perform high sensitivity NOx monitoring at the Manitowoc site in 1998.                          
Region 5 is pleased with Wisconsin’s NAMS, SLAMS, PAMS, and SPM programs for the criteria pollutants as well as TSP monitoring.  Therefore, I am approving Wisconsin’s monitoring program for meeting the requirements of 40 CFR Part 58.

Region 5 is particularly pleased with the proactive approach to the fine particulate monitoring program.  The mixture of Wisconsin’s current PM2.5, PM10 and TSP samplers should provide very valuable research information which will aid in the planning of the PM2.5 monitoring network.  The proposed network of 28 PM2.5 monitoring stations for 1998 is promising and we are pleased to see that Wisconsin is on its way to having the full statewide PM2.5 network implemented by the end of 1999.

The only area of some concern is that during the summer of 1997 an O3 monitor at Sheboygan was moved about a mile closer to Lake Michigan.  While this site location is acceptable to Region 5, in the future we want to be informed prior to an O3 monitoring site being moved during the ozone season.

Overall, Region 5 is very pleased with the monitoring program in Wisconsin.  We are aware that this program is facing some real challenges in 1998 and 1999 in terms of implementing the PM2.5 monitoring network and with the new 8-hour ozone standard.  Therefore, we look forward to a year of continued close interaction with Wisconsin as tough decisions are made.

If you have questions or comments on our review, please contact Michael Rizzo, of my staff, at (312) 353-6324 or by e-mail at

Thank you for the chance to review the 1998 monitoring network for the State of Wisconsin.

Sincerely yours,


David Kee, Director
Air and Radiation Division

cc:  Bruce C. Rodger, Operations Unit Leader
Air Monitoring Section, Bureau of Air Management

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This Information Last Modified On: 09/18/2008 03:58 PM