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Environmental Resource Associates and Scott Specialty Gases Announce Proficiency Testing Program for Environmental Laboratories
    Giving Labs the Means to Demonstrate the Proficiency of Their Air and
                               Emissions Tests

MILFORD, Mass., June 21 /PRNewswire-FirstCall/ -- Waters Corporation (NYSE: WAT) announced today that its wholly owned subsidiary, Environmental Resource Associates (Arvada, CO) will collaborate with Scott Specialty Gases (Plumsteadville, PA) to provide a comprehensive air and emissions Proficiency Testing (PT) program. Under the terms of the program, Scott will team with Environmental Resource Associates (ERA) to provide volatile organic standards for methods TO14 and TO15 that will complement ERA's common air and emissions PT standards. ERA will sell the standards and administer the proficiency testing studies for industrial and contract environmental laboratories responsible for air and emissions testing performed in compliance with federal and state statutes.

Proficiency testing is widely employed by analytical laboratories testing soil, water and waste-water samples. State and federal regulations require the use of PT standards to demonstrate the accuracy of the analytical measurement process. Until now, the enforcement of air and emissions proficiency testing requirements has been slowed by the lack of a single PT provider with the capability and the expertise to provide all the required standards and administer the PT studies. Together, ERA and Scott Specialty will fill this void by allowing labs to source the standards and implement regulated air and emissions PT program under the auspices of a single PT provider.

"Air proficiency testing is something that analytical laboratories, regulators and end users have been requesting for some time and Scott is the perfect partner to provide the volatile gas standards for this new program," offered Dr. Carl Craig, President of ERA. "This air program allows us to provide a more comprehensive suite of PT standards and studies to our customers." Speaking for Scott Specialty Gases, Joe Munley, Regional Vice President stated, "The unique nature of blended gas standards to the exacting specifications of a PT program requires a very high degree of technical capability and experience. Since Scott is the sole provider of NIST SRM gaseous candidates for this industry, producing PT standards is a natural extension of our capabilities for providing high quality gas mixtures."

About ERA (http://www.eraqc.com)

ERA manufactures chemical proficiency testing, quality control, calibration and suitability standards that allow industrial and independent contract analytical laboratories to demonstrate measurement accuracy and precision and ensure regulatory compliance. ERA standards are used in environmental, food, industrial, medical and pharmaceutical laboratories worldwide. ERA became a wholly-owned subsidiary of Waters Corporation at the beginning of 2007.

About Scott Specialty Gases (http://www.scottgas.com)

Scott Specialty Gases has 50 years of experience developing pure and mixed specialty gases for all types of applications and is the world's largest producer of EPA protocol gases. Products include pure and mixed gases for environmental, industrial, laboratory, scientific, homeland security, medical and semiconductor manufacturing applications.

Scott Specialty Gases combines technology-driven products with value-added services to help specialty gas users improve performance while reducing operating costs. Scott maintains numerous ISO 9001-2000 certified manufacturing facilities and 17025 accredited laboratories in North America and Europe.

About Waters Corporation (http://www.waters.com)

Waters Corporation (NYSE: WAT) creates business advantage for laboratory- dependent organizations by delivering practical and sustainable innovation to enable significant advancements in such areas as healthcare delivery, environmental management, food safety, and water quality worldwide.

Pioneering a connected portfolio of separations science, laboratory information management, mass spectrometry and thermal analysis, Waters technology breakthroughs and laboratory solutions provide an enduring platform for customer success.

With revenue of $1.28 billion in 2006 and 4,700 employees, Waters is driving scientific discovery and operational excellence for customers worldwide.


    Investor Contact:                     Media Contact:
    Gene Cassis                           Brian J. Murphy
    Vice President, Investor Relations    Corporate Communications
    508-482-2349                          508-482-2614
    Gene_Cassis@waters.com                brian_j_murphy@waters.com

    Joe Munley                            Joe Munley
    Regional Vice President               Regional Vice President
    800-217-2688                          800-217-2688
    jmunley@scottgas.com                  jmunley@scottgas.com
    Scott Specialty Gases                 Scott Specialty Gases
    http://www.scottgas.com               http://www.scottgas.com


SOURCE  Waters Corporation
    -0-                             06/21/2007
    /CONTACT:  Investors, Gene Cassis, Vice President, Investor Relations,
+1-508-482-2349, Gene_Cassis@waters.com, or Media, Brian J. Murphy, Corporate
Communications, +1-508-482-2614, brian_j_murphy@waters.com, both of Waters
Corporation; or Joe Munley, Regional Vice President of Scott Specialty Gases,
+1-800-217-2688, jmunley@scottgas.com for Waters Corporation/
    /Web site:  http://www.waters.com
                http://www.scottgas.com
                http://www.eraqc.com /
    (WAT)

CO:  Waters Corporation; Environmental Resource Associates; Scott Specialty
     Gases
ST:  Massachusetts
IN:  CHM ENV
SU:  CON PDT

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2999 06/21/2007 18:33 EDT http://www.prnewswire.com