1EMDII

1EMD

~ECEiVED

CLERK’S

OFFiCE

MAR

2 ~ 200’4

co~ut~or

Gon~iOt

BOarD

Thank you for taking the time for our phone conversation to discuss the adoption of the

Readycult product by the

Illinois Pollution Control Board.

promised, enclosed

is a letter describing the name and logo change from

Science to EMD Chemicals Inc.

We greatly appreciate that you are diligent in

keeping

our contact information current for prospective users of Readycult.

Please let me

know if you have questions.

eresa Sñiith,

Ph.

Central Region Microbiology Field Specialist

EMD Chemicals Inc.

800-648-4827,

ext. 724

EMD Chemicals

Inc.

480

South Democrat Road

Gibbstown, NJ

08027

Phone:

856-423-6300

Fax:

856-423-4389

www.emdchemicals.com

March 22, 2004

Mike McCambridge

Illinois Pollution Control

Board

I 00 West Randolph Street 11-500

Chicago lL60601

Dear Mike,

Sir

A Division ofEM

Industries,

Inc.

An Affiliateof Meitk KGaA. Darmstadt,

Germany

480 South Democrat Road

Gibbstown, NJ 08027-1297

800-222-0342

856-423-4389

Fax

October22, 2002

www.emscience.com

Dear Valued Customer,

Effective January

2003,

Industries, Inc. will begin using

its new corporate name EMD Chemicals Inc. As a

division

of EM

Industries, EM Science will

also begin using EMD Chemicals

Inc.

Our parent

company Merck

KGaA, headquartered in Darmstadt Germany, has redesigned its

logo and introduced new design guidelines to unify

and strengthen its market presence worldwide.

In the USA and Canada,

as the rights to the “Merck” name belong to

thepharmaceutical companyMerck & Co., we will unite

all our operations under the umbrella brand EMDusing the

same design guidelines as Merck KGaA.

Our new logos reflect this design and global brand

strategy.

~k1ERCK

1EklO

Merck KGaA, Darmstadt, Germany

EMD Chemicals Inc

Our customers

are key to

our business success and we recognize the significance of keeping

you

informed as

move forward

with our launch.

We are proud of the trust that you have placed in us over the years and you can

assured that we

will continue to deliver the same high quality

chemicals and reagents you have come

expect of

EM Sciencebrands.

There will be no

changes in the sourcing,

manufacturing processes, or theprimary packaging of ourproducts.

There

will, however, be changes in the design used

for

Certificates of Analysis, MSDS,

marketing and technical materials

andproduct

labels.

The actual products and the information about them will remainthe same.

Our address and telephone number will

not change nor will

our remittance address.

ask that you, and others

in your organization, update your records in January to reflect our new corporate name,EMD ChemicalsInc.

As EMD Chemicals Inc. we

will be

making

other

changes that

will not be

as apparent but that will

carry

the

tradition of quality,

integrity

and service that characterize

our company.

We are doing everything we

can to assure

that this

transition

has as little impact

as possible

on you and your operations, and regret any inconvenience these

changes may cause.

Attached is areference sheet that addresses questions you may have.

Our Sales,

Technical and

Customer Service Representatives are available

as always

answer-any