April 2, 2007

Lehigh Valley Chamber of Commerce
462 Walnut Street
Allentown, PA 18102

To Whom It May Concern:

I am writing this letter in regards to the Lehigh Valley Chamber of Commerce 2006 Excellence in Business Awards. As president of Principal Investments, LLC, a company that does Real Estate Acquisitions and management for many private investors in the Lehigh Valley. We have the privilege of working with many local companies. One of them is Keystone Consulting Engineers, Inc.

Keystone Consulting Engineers, Inc. is a company I have had the pleasure of working with for many years in various positions and because I represent companies that are developers I am still involved in working with them. Through all of this the people at Keystone Engineering, Inc. have always displayed a strong commitment to their clients and have never forgotten the importance of ethics and values in their business. Without a question Keystone Consulting Engineers, Inc. is a company that will not only help this Valley grow but will do so in a manner that makes them a model for young people and new businesses. It is for this reason that I strongly recommend Keystone Consulting Engineers, Inc. for the 2006 Excellence in Business Awards.

Sincerely,

Donald D. Frederick
President

March 30, 2007

Mr. William Erdman
Keystone Consulting Engineers, Inc.
6235 Hamilton Blvd.
Wescosville, PA 18106

RE: Letter of Recommendation

Dear Bill:

It is my pleasure to provide a letter of recommendation for Keystone Consulting Engineers, Inc.

During my ten year plus association with Keystone, our project workload has been continuous and involves projects ranging in complexity and scope from small studies to multi-million dollar projects. It is comforting to me to know that I can always pick up the phone and discuss site related issues at any of our campuses, and receive timely and thoughtful analysis. I have always also been impressed with Keystone’s ability to work through local approval processes and present information concisely and competently.

When design or facility issues pose challenges, Keystone is able to understand our needs and propose solutions that meet our goals. Long after projects are completed, Keystone remains committed to, and stands behind, their work.

I am pleased that your firm has been an important part of our growth and development over the past several years, and it is my hope that this relationship will continue in the future.

Sincerely,

Anita M. Kingsbauer
Vice President