Laboratory Announcement

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IAQ Leaders Join Forces as Aerotech P & K New team will benefit clientele

April 15, 2004

Phoenix, AZ

Severn Trent companies, Aerotech Laboratories, Inc. and P & K Microbiology Services, Inc., are teaming under the new name of Aerotech P & K. Aerotech P & K will focus on delivering innovative solutions in the Indoor Air Quality (IAQ) testing, training, and equipment markets as well as food and pharmaceutical microbiology.

Aerotech P & K will now offer the most comprehensive set of analyses available in the industry today and will provide Aerotech P & K clients more confidence in the capacity and scope of the team's facilities. Both companies have experience with cutting edge technologies including PCR, specialized microbial analysis, and allergen analysis. Severn Trent companies, STL and Aerotech P & K are now the Nation's largest environmental and Indoor Air Quality laboratories.

Aerotech P & K Chief Technical Officer, Dr. Chin Yang said, “Complex IAQ and mold analytical challenges continue to emerge. Our objective is to simplify and educate. The team at Aerotech P & K has unprecedented resources to achieve that objective.”

Aerotech P & K Chief Operating Officer, Vladimir Bolin said, “We have two major IAQ centers in New Jersey and Arizona. Our satellite IAQ centers continue to grow and STL's 52 US locations further support our IAQ network with courier and shipping capabilities. The IAQ market hasn't seen nearly this scale and range of services now provided by the Aerotech P & K team.”

Aerotech P & K will shortly introduce its new logo on reports, materials, and publications.

About Aerotech Laboratories, Inc.

Founded in 1993, Aerotech Laboratories, Inc. is recognized as the nation's largest commercial Indoor Air Quality (IAQ) business. They provide multiple analytical services including IAQ, Industrial Hygiene (IH), Consumer Products, Food Safety, Pharmaceutical, Biological Warfare, and Environmental Testing. As one of the few A2LA, EMLAP, and IHLAP accredited laboratories, Aerotech’s mission has been to deliver quality, timely, and legally defensible data to clients around the world. With hundreds of qualified professionals, Aerotech offers fast turnaround times and advanced analyses as well as a full line of IAQ and IH equipment and supplies. Aerotech Laboratories also provides online services for tracking projects and ordering supplies and has an unparalleled project management program to ensure each client receives excellent customer service.

About P & K Microbiology Services, Inc.

P & K Microbiology Services, the leader in the Microbiology and Mycology industry, has been providing services to many government agencies (such as USEPA, CDC, GSA, NSA, NIOSH, VA Hospitals, and US Army) as well as private institutions since 1988. This expertise coupled with their record of exceptional service has established P & K as the premier environmental microbiology laboratory. P & K’s accomplished staff has supported some of the most publicized mold testing cases in the United States servicing insurance firms, law firms, government agencies, and consulting groups.

For more information, contact:

Jim

Vice President

Severn Trent Laboratories, Inc.716-691-2600Visit our website @ www.stl-inc.com

S. Cochrane Director of Marketing Aerotech Laboratories, Inc.www.aerotechlabs.compcochrane@...

800.651.4802, Ext 1020

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