October 6, 2004

Refer to: HSA-10/WZ-191

Mr. Barry D. Stephens
Senior Vice President, Engineering
Energy Absorption Systems, Incorporated
3617 Cincinnati Avenue
Rocklin, California 95765

Dear Mr. Stephens:

October 6, 2004

Refer to: HSA-10/WZ-192

Mr. John H. Mortensen
Vice President
NAFISCO Traffic Control and Protection
4152 Warren Avenue
Hillside, Illinois 60162

Dear Mr. Mortensen:

November 2, 2004

Refer to: HSA-10/WZ-193

Mr. Peter A. Speer
Vice President, Sales
Davidson Traffic Control Products
Bunzel-Tacoma
3110 70th Avenue, East
Tacoma, Washington 98424

Dear Mr. Speer: