UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

WASHINGTON, D.C. 20460 

Thomas Granato 

Metropolitan WRD of Greater Chicago 

Monitoring and Research Department 

100 East Erie Street 

Chicago, Illinois 60611 

Dear Dr. Granato: 

DEC -4 2014 OFFICE OF CHEMICAL SAFETY 

AND POLLUTION PREVENTION 

On April 4, 20 14, and under the Toxic Substance Control Act (TSCA), the United States 

Environmental Protection Agency (EPA) issued a testing consent order (Order) that incorporates 

an enforceable consent agreement (ECA) with Dow Corning Corporation, Evonik Corporation, 

Momentive Performance Materials USA, Inc., Shin-Etsu Silicones of America, Inc., and Wacker 

Chemical Corporation (the Companies). The Companies have agreed to certain environmental 

testing that will be used by the EPA to characterize sources and pathways of release of 

octamethylcyclotetrasiloxane (D4) (CAS No. 556-67-2) to the environment and resulting 

exposures of aquatic and sediment dwelling organisms to D4, contributing to EPA's efforts to 

understand potential environmental effects of D4. D4 is widely used as a chemical intermediate 

and component of personal care products. 

The purpose of this letter is to ask your cooperation in allowing your wastewater treatment plant 

(WWTP) to serve as one ofthe environmental testing locations. 

Under the agreement between the EPA and the Companies, environmental testing will be 

performed at select locations throughout the United States, including at WWTPs that primarily 

serve residential customers as well as at WWTPs that serve industrial dischargers that process or 

formulate with D4. The Companies have already received a participation commitment from 

several WWTPs. In an effort to secure the additional plants required to meet the environmental 

testing requirements of this ECA, your WWTP has been identified as a candidate to be a testing 

location. This testing is narrowly focused, minimally intrusive, and should not interfere with 

your plant's normal operations. This program will focus exclusively on the fate of D4 in 

wastewater and environmental media. 

The Companies have hired a consultant to perform the monitoring. They should only need access 

to your site three times: once for an initial site visit to confirm sampling locations/logistics and 

twice to conduct the actual sampling (two events at least three months apart during normal 

WWTP operations). During the two sampling events, they would sample influent, effluent and 

biosolids at the WWTP and biota, surface water, and sediment in the receiving waters (i.e. , 

Internet Address ( URL) • http /lvfflw epa gov 

Recycled/Recyclable • Pnnted w•lh Veg"tab!e 011 Based Inks on 100% Postconsumer. Process Chlonne Free Recycled Paper 
where the effluent and river are mixed). D4 will be the one target analytc (no other chemical 

speciation will be performed). 

In order for the EPA to gain a better understanding of the environmental fate of D4, we are 

depending on the cooperation ofWWTPs like your facility. The success of this D4 testing 

program depends upon the voluntary participation of WWTPs. 

I hope you will agree to participate in this environmental testing program. Should you have any 

questions or concerns, please do not hesitate to contact Heather Njo of my staff at 202-564-2574 

or njo.heather@epa.gov. 

Thank you for your support. 

Sincerely, 

co~ c.~~ Wendy Cleland-Hamnett, Director 

Office of Pollution Prevention and Toxics 

cc: Keith Hardeman 
Gino Rizi 

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

WASHINGTON, 0 C 20460 

DEC -4 2014 

Greater Greensburg Wastewater Treatment Plant 

21 0 West Otterman Street 

Greensburg, Pennsylvania 15601 

Dear Mr. Rizi: 

OFFICE OF CHEMICAL SAFETY 

AND POLLUTION PREVENTION 

On April4, 201 4, and under the Toxic Substance Control Act (TSCA), the United States 

Environmental Protection Agency (EPA) issued a testing consent order (Order) that incorporates 

an enforceable consent agreement (ECA) with Dow Corning Corporation, Evonik Corporation, 

Momentive Performance Materials USA, Inc., Shin-Etsu Silicones of America, Inc., and Wacker 

Chemical Corporation (the Companies). The Companies have agreed to certain environmental 

testing that will be used by the EPA to characterize sources and pathways of release of 

octamethylcyclotetrasiloxane (D4) (CAS No. 556-67-2) to the environment and resulting 

exposures of aquatic and sediment dwelling organisms to D4, contributing to EPA's efforts to 

understand potential environmental effects ofD4. D4 is widely used as a chemical intermediate 

and component of personal care products. 

The purpose of this letter is to ask your cooperation in allowing your wastewater treatment plant 

(WWTP) to serve as one of the environmental testing locations. 

Under the agreement between the EPA and the Companies, environmental testing will be 

performed at select locations throughout the United States, including at WWTPs that primarily 

serve residential customers as well as at WWTPs that serve industrial dischargers that process or 

formulate with D4. The Companies have already received a participation commitment from 

several WWTPs. In an effort to secure the additional plants required to meet the environmental 

testing requirements of this ECA, your WWTP has been identified as a candidate to be a testing 

location. This testing is narrowly focused, minimally intrusive, and should not interfere with 

your plant's normal operations. This program wi ll focus exclusively on the fate ofD4 in 

wastewater and environmental media. 

The Companies have hired a consultant to perform the monitoring. They should only need access 

to your site three times: once for an initial site visit to confirm sampling locations/logistics and 

twice to conduct the actual sampling (two events at least three months apart during normal 

WWTP operations). During the two sampling events, they would sample influent, effluent and 

biosolids at the WWTP and biota, surface water, and sediment in the receiving waters (i.e., 

Internet Address (URL) • htlp //www epa gov 

Recycled/Recyclable • Pnnted w11h Vegetable 011 Based Inks on 100 ~ Postconsumer Process Chlonne Free Recycled Paper 
where the effluent and river arc mixed). D4 will be the one target analyte (no other chemical 

speciation will be performed). 

In order for the EPA to gain a better understanding of the environmental fate of D4, we are 

depending on the cooperation ofWWTPs like your facility. The success of this D4 testing 

program depends t1pon the voluntary participation of WWTPs. 

I hope you will agree to participate in this environmental testing program. Should you have any 

questions or concems, please do not hesitate to contact Heather Njo of my staff at 202-564-2574 

or njo.heather@epa.gov. 

Thank you for your support. 

Sincerely, 

Wendy Cleland-Hamnett, Director 

Office of Pollution Prevention and Taxies 
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

WASHINGTON, D.C. 20460 

Vanessa Joseph 

Trinity River Authority ofTexas 

Central Regional Wastewater System 

6500 West Singleton Boulevard 

Dallas, Texas 75212 

Dear Ms. Joseph: 

DEC -4 2014 OFFICE OF CHEMICAL SAFETY 

AND POLLUTION PREVENTION 

On April 4, 2014, and under the Toxic Substance Control Act (TSCA), the United States 

Environmental Protection Agency (EPA) issued a testing consent order (Order) that incorporates 

an enforceable consent agreement (ECA) with Dow Corning Corporation, Evonik Corporation, 

Momentive Performance Materials USA, Inc., Shin-Etsu Silicones of America, Inc., and Wacker 

Chemical Corporation (the Companies). The Companies have agreed to certain environmental 

testing that will be used by the EPA to characterize sources and pathways of release of 

octamethylcyclotetrasiloxane (04) (CAS No. 556-67-2) to the environment and resulting 

exposures of aquatic and sediment dwelling organisms to D4, contributing to EPA's efforts to 

understand potential environmental effects of 04. D4 is widely used as a chemical intermediate 

and component of personal care products. 

The purpose of this letter is to ask your cooperation in allowing your wastewater treatment plant 

(WWTP) to serve as one of the environmental testing locations. 

Under the agreement between the EPA and the Companies, environmental testing will be 

perfonned at select locations throughout the United States, including at WWTPs that primarily 

serve residential customers as well as at WWTPs that serve industrial dischargers that process or 

formulate with D4. The Companies have already received a participation commitment from 

several WWTPs. In an effort to secure the additional plants required to meet the environmental 

testing requirements of this ECA, your WWTP has been identified as a candidate to be a testing 

location. This testing is narrowly focused, minimally intrusive, and should not interfere with 

your plant's normal operations. This program will focus exclusively on the fate of 04 in 

wastewater and environmental media. 

The Companies have hired a consultant to perform the monitoring. They should only need access 

to your site three times: once for an initial site visit to confirm sampling locations/logistics and 

twice to conduct the actual sampling (two events at least three months apart during normal 

WWTP operations). During the two sampling events, they would sample influent, effluent and 

biosolids at the WWTP and biota, surface water, and sediment in the receiving waters (i.e. , 

Internet Address ( UR l) • http //www epa gov 

Recycled/Recyclable • Pnnted w11h Vegetable Oil Based Inks on 100% Postconsumer. Process Chlonne Free Recycled Paper 
where the effluent and river are mixed). D4 will be the one target analyte (no other chemical 

speciation will be performed). 

In order tOr the EPA to gain a better understanding of the environmental fate ofD4, we are 

depending on the cooperation ofWWTPs like your facility. The success of this D4 testing 

program depends upon the voluntary participation of WWTPs. 

I hope you will agree to participate in this environmental testing program. Should you have any 

questions or concerns, please do not hesitate to contact Heather Njo of my staff at 202-564-2574 

or njo.heather@epa.gov. 

Thank you for your support. 

Sincerely, 

Wendy Cleland-Hamnett, Director 

Office of Pollution Prevention and Taxies 
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

WASHINGTON, D.C. 20460 

David Dunnard 

Turkey Creek Waste Treatment 

713 7 Disposal Plant Road 

Pinson, Alabama 3 5126 

Dear Mr. Dunnard: 

DEC -4 2014 

OFFICE OF CHEMICAL SAFETY 

AND POLLUTION PREVENTION 

On April4, 2014, and under the Toxic Substance Control Act (TSCA), the United States 

Environmental Protection Agency (EPA) issued a testing consent order (Order) that incorporates 

an enforceable consent agreement (ECA) with Dow Corning Corporation, Evonik Corporation, 

Momentive Performance Materials USA, Inc., Shin-Etsu Silicones of America, Inc., and Wacker 

Chemical Corporation (the Companies). The Companies have agreed to certain environmental 

testing that will be used by the EPA to characterize sources and pathways of release of 

octamethylcyclotetrasiloxane (D4) (CAS No. 556-67-2) to the environment and resulting 

exposures of aquatic and sediment dwelling organisms to D4, contributing to EPA's efforts to 

understand potential environmental effects of D4. D4 is widely used a.c:; a chemical intermediate 

and component of personal care products. 

The purpose of this letter is to ask your cooperation in allowing your wastewater treatment plant 

(WWTP) to serve as one of the environmental testing locations. 

Under the agreement between the EPA and the Companies, environmental testing will be 

performed at select locations throughout the United States, including at WWTPs that primarily 

serve residential customers as well as at WWTPs that serve industrial dischargers that process or 

formulate with D4. The Companies have already received a participation commitment from 

several WWTPs. In an effort to secure the additional plants required to meet the environmental 

testing requirements of this ECA, your WWTP has been identified as a candidate to be a testing 

location. This testing is narrowly focused, minimally intrusive, and should not interfere with 

your plant's normal operations. This program will focus exclusively on the fate of D4 in 

wastewater and environmental media. 

The Companies have hired a consultant to perform the monitoring. They should only need access 

to your site three times: once for an initial site visit to confirm sampling locations/logistics and 

twice to conduct the actual sampling (two events at least three months apatt during normal 

WWTP operations). During the two sampling events, they would sample influent, effluent and 

biosolids at the WWTP and biota, surface water, and sediment in the receiving waters (i.e. , 

Internet Address (URL) • http 1/www epa gov 

Recycled/Recyclable • Pnnled w1th Vegetable 011 Based Inks on 100 to Postconsurner. Process Chlorine Free Recycled Paper 
biosolids at the WWTP and biota, surface water, and sediment in the receiving waters (i.e., 

where the effluent and river are mixed). D4 will be the one target analyte (no other chemical 

speciation will be performed). 

In order for the EPA to gain a better understanding of the environmental fate of 04, we are 

depending on the cooperation of WWTPs like your facility. The success of this D4 testing 

program depends upon the voluntary participation ofWWTPs. 

I hope you will agree to participate in this environmental testing program. Should you have any 

questions or concerns, please do not hesitate to contact Heather Njo of my staff at 202-564-2574 

or njo.heather@epa.gov. 

Thank you for your support. 

Sincerely, 

~~c.~~ 

Wendy Cleland-Hamnett, Director 

Office of Pollution Prevention and Taxies 
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

WASHINGTON, D.C. 20460 

Cheri Cousens 

Greater Lawrence Sanitary District 

240 Charles Street 

North Andover, Massachusetts 01845 

Dear Ms. Cousens: 

DEC - 4 2014 

OFFICE OF CHEMICAL SAFETY 

AND POLLUTION PREVENTION 

On April 4, 2014, and under the Toxic Substance Control Act (TSCA), the United States 

Environmental Protection Agency (EPA) issued a testing consent order (Order) that incorporates 

an enforceable consent agreement (ECA) with Dow Corning Corporation, Evonik Corporation, 

Momentive Performance Materials USA, Inc., Shin-Etsu Silicones of America, Inc., and Wacker 

Chemical Corporation (the Companies). The Companies have agreed to certain environmental 

testing that will be used by the EPA to characterize sources and pathways of release of 

octamethylcyclotetrasiloxane (D4) (CAS No. 556-67-2) to the environment and resulting 

exposures of aquatic and sediment dwelling organisms to D4, contributing to EPA's efforts to 

understand potential environmental effects of D4. 04 is widely used as a chemical intermediate 

and component of personal care products. 

The purpose of this letter is to ask your cooperation in allowing your wastewater treatment plant 

(WWTP) to serve as one of the environmental testing locations. 

Under the agreement between the EPA and the Companies, environmental testing will be 

performed at select locations throughout the United States, including at WWTPs that primarily 

serve residential customers as well as at WWTPs that serve industrial dischargers that process or 

formulate with D4. The Companies have already received a participation commitment from 

several WWTPs. In an effort to secure the additional plants required to meet the environmental 

testing requirements of this ECA, your WWTP has been identified as a candidate to be a testing 

location. This testing is narrowly focused, minimally intrusive, and should not interfere with 

your plant's normal operations. This program will focus exclusively on the fate of D4 in 

wastewater and environmental media. 

The Companies have hired a consultant to perform the monitoring. They should only need access 

to your site three times: once for an initial site visit to confirm sampling locations/logistics and 

twice to conduct the actual sampling (two events at least three months apart during normal 

WWTP operations). During the two sampling events, they would sample influent, effluent and 

biosolids at the WWTP and biota, surface water, and sediment in the receiving waters (i.e. , 

Internet Address (URL) • http /lwww epa gov 

Recycled/Recyclable • Pr•nted wtth Vegetable 01 Based Inks on 100% Postc.onsumer Process Chlonne FreP Recycled Paper 
where the effluent and river are mixed). D4 will be the one target analyte (no other chemical 

speciation will be performed). 

In order for the EPA to gain a better understanding of the environmental fate of D4, we are 

depending on the cooperation ofWWTPs like your facility. The success of this D4 testing 

program depends upon the voluntary participation ofWWTPs. 

I hope you will agree to participate in this environmental testing program. Should you have any 

questions or concerns, please do not hesitate to contact Heather Njo of my staff at 202-564-2574 

or njo.heather@epa.gov. 

Thank you for your support. 

Wendy 

[0~c~~ Cleland-Hamnett, Director 

Office of Pollution Prevention and Taxies 
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

WASHINGTON, D.C. 20460 

Rob Lauriceloa 

Claremont Wastewater Treatment Plant 

338 Plains Road 

Claremont, New Hampshire 27103 

Dear Mr. Lauriceloa: 

DEC -4 2014 OFFICE OF CHEMICAL SAFETY 

AND POLLUTION PREVENTION 

On April 4, 2014, and under the Toxic Substance Control Act (TSCA), the United States 

Environmental Protection Agency (EPA) issued a testing consent order (Order) that incorporates 

an enforceable consent agreement (ECA) with Dow Coming Corporation, Evonik Corporation, 

Momentive Performance Materials USA, Inc., Shin-Etsu Silicones of America, Inc., and Wacker 

Chemical Corporation (the Companies). The Companies have agreed to certain environmental 

testing that will be used by the EPA to characterize sources and pathways of release of 

octamethylcyclotetrasiloxane (D4) (CAS No. 556-67-2) to the environment and resulting 

exposures of aquatic and sediment dwelling organisms to 04, contributing to EPA's efforts to 

understand potential environmental effects of D4. 04 is widely used as a chemical intermediate 

and component of personal care products. 

The purpose of this letter is to ask your cooperation in allowing your wastewater treatment plant 

(WWTP) to serve as one of the environmental testing locations. 

Under the agreement between the EPA and the Companies, environmental testing will be 

performed at select locations throughout the United States, including at WWTPs that primarily 

serve residential customers as well as at WWTPs that serve industrial dischargers that process or 

formulate with 04. The Companies have already received a participation commitment from 

several WWTPs. In an effort to secure the additional plants required to meet the environmental 

testing requirements of this ECA, your WWTP has been identified as a candidate to be a testing 

location. This testing is narrowly focused, minimally intrusive, and should not interfere with 

your plant's normal operations. This program will focus exclusively on the fate of D4 in 

wastewater and environmental media. 

The Companies have hired a consultant to perform the monitoring. They should only need access 

to your site three times: once for an initial site visit to confirm sampling locations/logistics and 

twice to conduct the actual sampling (two events at least three months apart during normal 

WWTP operations). During the two sampling events, they would sample influent, effluent and 

biosolids at the WWTP and biota, surface water, and sediment in the receiving waters (i.e., 

Internet Address (URL) • http //www epa gov 

Recycled/Recyclable • Pnnted w•th Vegetable 011 Based Inks on 100% Postconsumer. Process Chlonne Free Recycled Paper 
where the effluent and river are mixed). D4 will be the one target analyte (no other chemical 

speciation will be performed). 

In order for the EPA to gain a better understanding of the environmental fate ofD4, we are 

depending on the cooperation ofWWTPs like your facility. The success ofthis D4 testing 

program depends upon the voluntary participation of WWTPs. 

I hope you will agree to participate in this environmental testing program. Should you have any 

questions or concerns, please do not hesitate to contact Heather Njo of my staff at 202~564-2574 

or njo.heather@epa.gov. 

Thank you for your support. 

Sincerely, 

~0~C-<e:X~ 

Wendy C!eland-Hamnett, Director 

Office of Pollution Prevention and Taxies 
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

WASHINGTON, D.C. 20460 

Jeanie Grindstaff 

Hopewell Wastewater Treatment Plant 

23 I Hummel Ross Road 

Hopewell, Virginia 23860 

Dear Ms. Grindstaff: 

DEC -4 2014 

OFFICE OF CHEMICAL SAFETY 

AND POLLUTION PREVENTION 

On April4, 2014, and under the Toxic Substance Control Act (TSCA), the United States 

Environmental Protection Agency (EPA) issued a testing consent order (Order) that incorporates 

an enforceable consent agreement (ECA) with Dow Coming Corporation, Evonik Corporation, 

Momentive Performance Materials USA, Inc., Shin-Etsu Silicones of America, Inc., and Wacker 

Chemical Corporation (the Companies). The Companies have agreed to certain environmental 

testing that will be used by the EPA to characterize sources and pathways of release of 

octamethylcyclotetrasiloxane (D4) (CAS No. 556-67-2) to the environment and resulting 

exposures of aquatic and sediment dwelling organisms to 04, contributing to EPA's efforts to 

understand potential environmental effects of D4. D4 is widely used as a chemical intermediate 

and component of personal care products. 

The purpose of this letter is to ask your cooperation in allowing your wastewater treatment plant 

(WWTP) to serve as one ofthe environmental testing locations. 

Under the agreement between the EPA and the Companies, environmental testing will be 

performed at select locations throughout the United States, including at WWTPs that primarily 

serve residential customers as well as at WWTPs that serve industrial dischargers that process or 

formulate with 04. The Companies have already received a participation commitment from 

several WWTPs. In an effort to secure the additional plants required to meet the environmental 

testing requirements of this ECA, your WWTP has been identified as a candidate to be a testing 

location. This testing is narrowly focused, minimally intrusive, and should not interfere with 

your plant's normal operations. This program will focus exclusively on the fate of D4 in 

wastewater and environmental media. 

The Companies have hired a consultant to perform the monitoring. They should only need access 

to your site three times: once for an initial site visit to confirm sampling locations/logistics and 

twice to conduct the actual sampling (two events at least three months apart during normal 

WWTP operations). During the two sampling events, they would sample influent, effluent and 

biosolids at the WWTP and biota, surface water, and sediment in the receiving waters (i.e. , 

Internet Address (URL) ·http llwww epa gov 

Recycled/Recyclable • Pnnted w1!>1 Vegetable Oil Based Ink~ on 100% Postconsumec Process Chlorine Free Recycled Paper 
where the effluent and river are mixed). D4 will be the one target analyte (no other chemical 

speciation will be performed). 

In order for the EPA to gain a better understanding of the environmental fate of D4, we are 

depending on the cooperation ofWWTPs like your facility. The success of this D4 testing 

program depends upon the voluntary pm1icipation of WWTPs. 

I hope you will agree to participate in this environmental testing program. Should you have any 

questions or concerns, please do not hesitate to contact Heather Njo of my staff at 202-564-2574 

or njo.heather@epa.gov. 

Thank you for your support. 

Sincerely, 

w~c. 

Wendy Cleland-Hamnett, Director 

Office of Pollution Prevention and Toxics 
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

WASHINGTON, D.C. 20460 

John Loderhose 

Sissel Point Wastewater Treatment Plant 

l 0 East Grand Boulevard 

St. Lewis, Missouri 63 147 

Dear Mr. Loderhose: 

DEC -4 2014 

OFFICE OF CHEMICAL SAFETY 

AND POLLUTION PREVENTION 

On April 4, 2014, and under the Toxic Substance Control Act (TSCA), the United States 

Environmental Protection Agency (EPA) issued a testing consent order (Order) that incorporates 

an enforceable consent agreement (ECA) with Dow Corning Corporation, Evonik Corporation, 

Momentive Performance Materials USA, Inc., Shin-Etsu Silicones of America, Inc., and Wacker 

Chemical Corporation (the Companies). The Companies have agreed to ce11ain enviromnental 

testing that will be used by the EPA to characterize sources and pathways of release of 

octamethylcyclotetrasiloxane (D4) (CAS No. 556-67-2) to the environment and resulting 

exposures of aquatic and sediment dwelling organisms to 04, contributing to EPA's efforts to 

understand potential environmental effects of 04. D4 is widely used as a chemical intermediate 

and component of personal care products. 

The purpose of this letter is to ask your cooperation in allowing your wastewater treatment plant 

(WWTP) to serve as one of the environmental testing locations. 

Under the agreement between the EPA and the Companies, environmental testing will be 

performed at select locations throughout the United States, including at WWTPs that primarily 

serve residential customers as well as at WWTPs that serve industrial dischargers that process or 

formulate with D4. The Companies have already received a participation commitment from 

several WWTPs. In an effort to secure the additional plants required to meet the environmental 

testing requirements of this ECA, your WWTP has been identified as a candidate to be a testing 

location. This testing is narrowly focused, minimally intrusive, and should not interfere with 

your plant's normal operations. This program will focus exclusively on the fate ofD4 in 

wastewater and environmental media. 

The Companies have hired a consultant to perform the monitoring. They should only need access 

to your site three times: once for an initial site visit to confirm sampling locations/logistics and 

twice to conduct the actual sampling (two events at least three months apart during normal 

WWTP operations). During the two sampling events, they would sample influent, effluent and 

biosolids at the WWTP and biota, surface water, and sediment in the receiving waters (i.e., 

Internet Add es~; (URL) • http /lwww epa gov 

Recycled/Recyclable • Pnnted w1th Vegelable 011 Based Inks on 100% Postconsumer. Process Chlonne Free Recycled Paper 
where the effluent and river are mixed). D4 will be the one target analyte (no other chemical 

speciation will be performed). 

In order for the EPA to gain a better understanding of the environmental fate ofD4, we are 

depending on the cooperation ofWWTPs like your facility. The success of this D4 testing 

program depends upon the voluntary participation of WWTPs. 

I hope you will agree to participate in this environmental testing program. Should you have any 

questions or concerns, please do not hesitate to contact Heather Njo of my staff at 202-564-2574 

or njo.heather@epa.gov. 

Thank you for your support. 

Wendy Cleland-Hamnctt, Director 

Office of Pollution Prevention and Taxies 
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

WASHINGTON, 0 C. 20460 

Brian J. Smith 

Plant Operations Manager 

Water Services Department 

Carter Creek Wastewater Treatment Plant 

2200 North Forest Parkway 

College Station, Texas 77845 

Dear Mr. Smith: 

DEC- 4 2014 

OFFICE OF CHEMICAL SAFETY 

AND POLLUTION PREVENTION 

On April4, 2014, and under the Toxic Substance Control Act (TSCA), the United States 

Environmental Protection Agency (EPA) issued a testing consent order (Order) that incorporates 

an enforceable consent agreement (ECA) with Dow Corning Corporation, Evonik Corporation, 

Momentive Performance Materials USA, Inc., Shin-Etsu Silicones of America, Inc., and Wacker 

Chemical Corporation (the Companies). The Companies have agreed to certain environmental 

testing that will be used by the EPA to characterize sources and pathways of release of 

octamethylcyclotetrasiloxane (D4) (CAS No. 556-67-2) to the environment and resulting 

exposures of aquatic and sediment dwelling organisms to D4, contributing to EPA's efforts to 

understand potential environmental effects of D4. D4 is widely used as a chemical intermediate 

and component of personal care products. 

The purpose of this letter is to ask your cooperation in allowing your wastewater treatment plant 

(WWTP) to serve as one of the environmental testing locations. 

Under the agreement between the EPA and the Companies, environmental testing will be 

performed at select locations throughout the United States, including at WWTPs that primarily 

serve residential customers as well as at WWTPs that serve industrial dischargers that process or 

formulate with D4. The Companies have already received a participation commitment from 

several WWTPs. In an effort to secure the additional plants required to meet the environmental 

testing requirements of this ECA, your WWTP has been identified as a candidate to be a testing 

location. This testing is narrowly focused, minimally intrusive, and should not interfere with 

your plant's normal operations. This program will focus exclusively on the fate of D4 in 

wastewater and environmental media. 

The Companies have hired a consultant to perform the monitoring. They should only need access 

to your site three times: once for an initial site visit to confirm sampling locations/logistics and 

twice to conduct the actual sampling (two events at least three months apart during normal 

WWTP operations). During the two sampling events, they would sample influent, effluent and 

Internet Address (URL) ·http //www epa gov 

Recycled/Recyclable • Prtntcd wtlh Vegetable Otl Based Inks on 100% Postconsumer. Process Chlonne Free Recycled Paper 
where the effluent and river are mixed). D4 will be the one target analyte (no other chemical 

speciation will be performed). 

In order for the EPA to gain a better understanding of the envirorunenta! fate ofD4, we are 

depending on the cooperation ofWWTPs like your facility. The success of this D4 testing 

program depends upon the voluntary participation ofWWTPs. 

I hope you will agree to participate in this environmental testing program. Should you have any 

questions or concerns, please do not hesitate to contact Heather Njo of my staff at 202-564-2574 

or njo.heather@epa.gov. 

Thank you for your support. 

Wendy Cleland-Hamnett, Director 

Office of Pollution Prevention and Taxies 
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

WASHINGTON, 0 C 20460 

Andrew Burroughs 

Tuscaloosa Wastewater Treatment Plant 

3900 Kauloosa Avenue 

Tuscaloosa, Alabama 35401 

Dear Mr. Burroughs: 

DEC -4 2014 

OFFICE OF CHEMICAL SAFETY 

AND POLLUTION PREVENTION 

On April 4, 2014, and under the Toxic Substance Control Act (TSCA), the United States 

Environmental Protection Agency (EPA) issued a testing consent order (Order) that incorporates 

an enforceable consent agreement (ECA) with Dow Corning Corporation, Evonik Corporation, 

Momentive Performance Materials USA, Inc., Shin-Etsu Silicones of America, Inc., and Wacker 

Chemical Corporation (the Companies). The Companies have agreed to certain environmental 

testing that will be used by the EPA to characterize sources and pathways of release of 

octamethylcyclotetrasiloxane (D4) (CAS No. 556-67-2) to the environment and resulting 

exposures of aquatic and sediment dwelling organisms to D4, contributing to EPA's efforts to 

understand potential environmental effects of D4. D4 is widely used as a chemical intermediate 

and component of personal care products. 

The purpose of this letter is to ask your cooperation in allowing your wastewater treatment plant 

(WWTP) to serve as one of the environmental testing locations. 

Under the agreement between the EPA and the Companies, environmental testing will be 

performed at select locations throughout the United States, including at WWTPs that primarily 

serve residential customers as well as at WWTPs that serve industrial dischargers that process or 

formulate with D4. The Companies have already received a participation commitment from 

several WWTPs. In an effort to secure the additional plants required to meet the environmental 

testing requirements of this ECA, your WWTP has been identified as a candidate to be a testing 

location. This testing is narrowly focused, minimally intrusive, and should not interfere with 

your plant's normal operations. This program will focus exclusively on the fate of D4 in 

wastewater and environmental media. 

The Companies have hired a consultant to perform the monitoring. They should only need access 

to your site three times: once for an initial site visit to confirm sampling locations/logistics and 

twice to conduct the actual sampling (two events at least three months apart during normal 

WWTP operations). During the two sampling events, they would sample influent, effluent and 

biosolids at the WWTP and biota, surface water, and sediment in the receiving waters (i.e. , 

Internet Address (URL) • http 1/www epa gov 

Recycled/Recyclable • Pronted w•th Vegetable 011 Ba5ed Inks on 100% Postconsomer Process Chlonne Free Recycled Paper 
where the effluent and river are mixed). D4 will be the one target analyte (no other chemical 

speciation will be performed). 

In order for the EPA to gain a better understanding of the environmental fate ofD4, we are 

depending on the cooperation ofWWTPs like your facility. The success of this D4 testing 

program depends upon the voluntary participation of WWTPs. 

I hope you will agree to participate in this environmental testing program. Should you have any 

questions or concems, please do not hesitate to contact Heather Njo of my staff at 202-564-2574 

or njo.heather@epa.gov. 

Thank you for your support. 

Sincerely, 

Wendy Cleland-Hamnett, Director 

Office of Pollution Prevention and Taxies 
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

WASHINGTON DC 20460 

Jamie Dillard 

Southport Wastewater Treatment Plant 

3880 West Southport 

Indianapolis, Indiana 46217 

Dear Mr. Dillard: 

DEC -4 2014 

OFFICE OF CHEMICAL SAFETY 

AND POLLUTION PREVENTION 

On April4, 2014, and under the Toxic Substance Control Act (TSCA), the United States 

Environmental Protection Agency (EPA) issued a testing consent order (Order) that incorporates 

an enforceable consent agreement (ECA) with Dow Corning Corporation, Evonik Corporation, 

Momentive Performance Materials USA, Inc., Shin-Etsu Silicones of America, Inc., and Wacker 

Chemical Corporation (the Companies). The Companies have agreed to certain environmental 

testing that will be used by the EPA to characterize sources and pathways of release of 

octamethylcyclotetrasiloxane (04) (CAS No. 556-67-2) to the environment and resulting 

exposures of aquatic and sediment dwelling organisms to D4, contributing to EPA's efforts to 

understand potential environmental effects of 04. 04 is widely used as a chemical intermediate 

and component of personal care products. 

The purpose of this letter is to ask your cooperation in allowing your wastewater treatment plant 

(WWTP) to serve as one of the environmental testing locations. 

Under the agreement between the EPA and the Companies, environmental testing will be 

performed at select locations throughout the United States, including at WWTPs that primarily 

serve residential customers as well as at WWTPs that serve industrial dischargers that process or 

formulate with D4. The Companies have already received a participation commitment from 

several WWTPs. In an effort to secure the additional plants required to meet the environmental 

testing requirements of this ECA, your WWTP has been identified as a candidate to be a testing 

location. This testing is narrowly focused, minimally intrusive, and should not interfere with 

your plant's normal operations. This program will focus exclusively on the fate of 04 in 

wastewater and environmental media. 

The Companies have hired a consultant to perform the monitoring. They should only need access 

to your site three times: once for an initial site visit to confirm sampling locations/logistics and 

twice to conduct the actual sampling (two events at least three months apart during nmmal 

WWTP operations). During the two sampling events, they would sample influent, effluent and 

biosolids at the WWTP and biota, surface water, and sediment in the receiving waters (i.e. , 

Internet Address (URL) • http /lwww epa gov 

Recycled/Recyclable • Pnnted w1th Vegetable 011 Based Inks on 100% Postconsumer. Process Chlorone Free Recycled Paper 
where the effluent and river are mixed). D4 will be the one target analyte (no other chemical 

speciation will be performed). 

In order for the EPA to gain a better understanding of the environmental fate ofD4, we are 

depending on the cooperation ofWWTPs like your facility. The success of this D4 testing 

program depends upon the voluntary participation of WWTPs. 

I hope you will agree to participate in this environmental testing program. Should you have any 

questions or concerns, please do not hesitate to contact Heather Njo of my staff at 202~564-2574 

or njo.heather@epa.gov. 

Thank you for your support. 

~c~C.~~ Wendy Cleland-Hamnett, Director 

Office of Pollution Prevention and Taxies 
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

WASHINGTON, D.C. 20460 

Frank Crump 

City of Winston-Salem 

2801 Griffith Road 

Winston Salem, North Carolina 27103 

Dear Mr. Crump: 

DEC -4 2014 

OFFICE OF CHEMICAL SAFETY 

AND POLLUTION PREVENTION 

On April4, 2014, and under the Toxic Substance Control Act (TSCA), the United States 

Environmental Protection Agency (EPA) issued a testing consent order (Order) that incorporates 

an enforceable consent agreement (ECA) with Dow Corning Corporation, Evonik Corporation, 

Momentive Performance Materials USA, Inc., Shin-Etsu Silicones of America, Inc., and Wacker 

Chemical Corporation (the Companies). The Companies have agreed to certain environmental 

testing that will be used by the EPA to characterize sources and pathways of release of 

octamethylcyclotetrasiloxane (D4) (CAS No. 556-67-2) to the environment and resulting 

exposures of aquatic and sediment dwelling organisms to D4, contributing to EPA's efforts to 

understand potential environmental effects of D4. D4 is widely used as a chemical intennediate 

and component of personal care products. 

The purpose of this letter is to ask your cooperation in allowing your wastewater treatment plant 

(WWTP) to serve as one ofthe environmental testing locations. 

Under the agreement between the EPA and the Companies, environmental testing will be 

performed at select locations throughout the United States, including at WWTPs that primarily 

serve residential customers as well as at WWTPs that serve industrial dischargers that process or 

formulate with D4. The Companies have already received a participation commitment from 

several WWTPs. In an effort to secure the additional plants required to meet the environmental 

testing requirements of this ECA, your WWTP has been identified as a candidate to be a testing 

location. This testing is narrowly focused, minimally intrusive, and should not interfere with 

your plant's normal operations. This program will focus exclusively on the fate ofD4 in 

wastewater and environmental media. 

The Companies have hired a consultant to perform the monitoring. They should only need access 

to your site three times: once for an initial site visit to confirm sampling locations/logistics and 

twice to conduct the actual sampling (two events at least three months apart during normal 

WWTP operations). During the two sampling events, they would sample influent, effluent and 

biosolids at the WWTP and biota, surface water, and sediment in the receiving waters (i.e., 

Internet Address (URL) • http 1/www epa gov 

Recycled/Recyclable • Pnnted w1th Vegetable 011 Based Inks on 100% Postconsumer. Process Chlonne Free Recycled Paper 
where the effluent and river are mixed). 04 will be the one target analyte (no other chemical 

speciation will be performed). 

In order for the EPA to gain a better understanding of the environmental f8.te of 04, we are 

depending on the cooperation ofWWTPs like your facility. The success of this 04 testing 

program depends upon the voluntary participation of WWTPs. 

I hope you will agree to pm1icipate in this environmental testing program. Should you have any 

questions or concerns, please do not hesitate to contact Heather Njo of my staff at 202·564·2574 

or njo.heather@epa.gov. 

Thank you for your support 

~C-~cST Wendy Cleland·f-Iamnett, Director 

Office of Pollution Prevention and Taxies