UNITED STATES ENVIRONMENTAL PROTECTION AGENCY WASHINGTO N , D

. C

. 20460

Thomas Granato Metropolitan WRD of Greate r Chicago Monitoring and Research Department 100 East Er ie Street Chicago , Illinois 60611 D ear Dr. Granato: 

## DEC -4 2014 OFFICE OF CHEMICAL SAFETY AND POL LUTION PREVENT ION

On April 4 , 20 14, and under the Toxic Substance Control Act (TSCA), the United States Environmen ta l 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 rel ease of octamethylcyclotetrasiloxane (D4) (CAS No. 556-67

- 2) to the environmen t and resu lting exposures of aq uatic and sed iment dwelling organisms to D4 , contr ibuting 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 se rve as one ofthe environmental testing locati ons. U nder the agreement between the EPA and the Companies , environmenta l testing will be performed at select locations throughout the United States , including at WWTP s that primaril y serve residential customers as well as at WWTPs that serve indu s trial dischargers that process o r formulate with D4. The Companies have already received a participation commitment from several WWTPs. 

### In an effort to secure the add iti onal plant s required to meet the environmenta l tes ting requirements of thi s ECA, your WWTP has been identified as a candid ate 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 o nly 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. ,

I nternet 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 HardemanGino Rizi UNITED STATES ENVIRONMENTAL PROTECTION AGENCY WASHI N GTO N , 0 C 20460



## DEC -4 2014

Greater Greensburg Wastewater Treatment Pl ant 21 0 West Otterman Street Greensburg, Penn sylvania 15601 Dear Mr. Rizi: OFFICE OF CHEMICAL SAFETY AND POLLUTION PREVENTION

On April4, 201 4 , and under the Toxic Substance Contro l 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 Corporati on, Evonik Corporation, Momentive Performance Materials USA , Inc., Sh in- Etsu Silicones of America, Inc. , and Wacker C hemical Corporation (the Companies)

. The Companies have agreed to certain environmental testing that will be u sed by the EPA to characterize sources and pathway s 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 i s 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 t reatment plant (WWTP) to serve as one of the environmental testing locations. Under th e agreement betwee n the EPA and th e Companies, environmental tes ting 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 form ulate with D4. The Companies have a lready 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 opera ti ons. This program wi ll focus exclus ively on the fate of D4 in wastewater and environmental media. The Companies have hired a consultant to perf o rm the monitoring

. They shou ld only need access to your site three times: once for an initial site visit to confirm sampling locations/logistics and twice to conduct the ac tu al 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 Paperwhere 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 TaxiesUNITED STATES ENVIRONMENTAL PROTECTION AGENCY WASHINGTON, D.C. 20460

Vanessa Jo seph 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 Con trol 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 aq uatic and sed iment dwelling organi sms 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 i s 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 , env ironmental 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 environmenta l testing requirements of this ECA, your WWTP has been identifi ed 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 s ite visit to confirm sampling locations/logis tics 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 TaxiesUNITED STATES ENVIRONMENTAL PROTECTION AGENCY WASHI N GTO N , D.C. 204 60

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 PREVENT I ON

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, In c. , Shin-Etsu Silicones of America, Inc., and Wacker Chemica l Corporation (the Companies). The Companies have agreed to certain environmenta l testing that w ill 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 potenti al environmental effects of D4. D4 is widely used a.c:; a chemical intermediate and component ofpersonal 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 thi s ECA, your WWTP has been iden tifi ed 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 s ite 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 Paperbiosolids 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 TaxiesUNITED STATES ENVIRONMENTAL PROTECTION AGENCY WASHINGTON , D

. C

. 20460

Cheri Cousens Greater Lawrence Sanitary District 240 Charles St reet North Andover, Massachu setts 01845 Dear Ms. Cousens: 

## DEC - 4 201 4 OF F ICE O F C HEMI C A L SAFETY A N D PO L LU T I O N PREVE N TI ON

On April 4 , 2014, and under the Tox ic S ubs tance Contro l Act (TSCA), the Un ited States Environme ntal Protection Agency (EPA) issued a testing consent o rder (Order) that incorporates an enforc eable consent agreement (ECA) with Dow Corning Corporation, Evonik Corporation, Momenti ve Perf o rmance M aterials USA, Inc., S hin-Etsu Silicones of Ameri ca , Inc., and Wacker Chemical Corporation (the Companie s). T he Companies have agreed to certain environmental testing that will be used by the EPA to character ize sources and pathways of release of octamethylcyclotetrasiloxane (D4) (CAS No
. 556

- 67

- 2) to the envi ronment and resulting exposures of aquatic and sed iment dwellin g o rganisms to D4 , contri but in g to EPA's efforts to understand potential env iro nmental effects of D4. 04 is widely u sed as a chemical intermediate and component o f person al care products. The purp ose o f this letter is to ask you r cooperatio n in allowing your wastewater treatment plant (WWTP) to serve as one of the en vironmenta l test ing loc ations. Under the agreement between the EPA and th e Compa ni es, environmental test in g will be performed at select locati o ns throughout the United States, including at WWTP s that primarily serve residential customers as well as at WWTPs tha t serve industrial dischargers that process or formulate with D4. The Companies have a lready received a participatio n comm itment from several WWTPs. In an effort to secure the additional plants required to meet the envi ronmenta l testing requirements of this ECA, your WWTP has been identified as a candid ate t o be a te sting location. This testing is n arrowly focused , minimall y intru s ive , and should not interfere with your plant' s normal operations. T his pro g ram will focus exclusively on the fate of D4 in wastewater and environmental media. The Companies have hired a consultant to perform the monitoring. They shou ld on ly need access to your s ite three times: once for an initi a l s ite vi sit to confirm sam pling loc ati o ns/logistics and twice to conduct the actual sampling (two eve nts at least three months apart during normal WWTP ope ratio ns). During the two sampling events , they would sam ple influent, effluent and biosol ids at the WWTP and biota, s urface water, and sediment in the receiving waters (i.e. ,

I nternet Add ress (URL) • http /lwww epa gov Recycled/ R ecy cl able • 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.

# [0~c~~ Wendy Cleland-Hamnett, Director Office of Pollution Prevention and TaxiesUNITED STATES ENVIRONMENTAL PROTECTION AGENCY WASHINGTO N , D.C. 204 60

Rob Lauriceloa Claremont Wastewater Treatment Plant 338 Plain s Road C laremont, New Hampshire 27 103 Dear Mr. Lauriceloa: 

## DEC -4 2014 OFFICE OF CHEMICAL SAFETY AND POL L UTION 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 Cor poration , 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 i s 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 wi ll be performed at select locations throughout the United States, including at WWTP s that primarily serve residential customers as well as at WWTPs that serve indu s trial 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 iden tified as a candidate to be a testing location. This testing is narrowly focused, minimally intru s ive, 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 acce ss to your site three times: once for an initial site visit to confirm sampling locations/lo gistics and twice to conduct the actual sampli ng (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 TaxiesUNITED STATES ENVIRONMENTAL PROTECTION AGENCY WASHINGTO N , D.C. 20460

Jeanie Grin dstaff Hopewell Wastewater Tre atment Plant 23 I Humme l Ross Road Hopewe ll , Virginia 23860 Dear Ms. Grindstaff: 

## DEC -4 2014 OFFICE OF CHEMICAL SAFETY AND POLLUT ION 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) w ith Dow Comin g Corporation, Evonik Corporation, Momentive Performance Materials USA, Inc., Sh in-Etsu Silicones of America, Inc., and Wacker Chemical Corporation (the Companies). The Companies have agreed to certain environmental testing that w ill be used by the EPA to characterize sources and pathways of release of octamethylcyclotetrasiloxane (D4) (CAS No. 556-67 -2) to the env ironment and resulting exposures of aquatic and sediment dwelling organisms to 04 , contribut ing to EPA's effort s to understand potential environmental effects of D4. D 4 i s widely used as a chemical intermediat e and component of personal care products. The purpose of thi s letter is to ask your cooperation in allowing your wastewate r treatment plant (WWTP) to serve as one ofthe environmental testing locations. Under the agreement between the EPA and the Co mp anies , env ironmental te sting 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 w ith 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 r equ irements of thi s ECA, yo ur WWTP has been identified as a cand idate to be a testing location. This testing is n arrow ly focused, minimally intrusive, and should not in terfere with your plant 's normal operations. T his 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 si te visit to confirm sampl ing locations/logi stics and twice to conduct the actual sampling (two events at least th ree 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 sed iment 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 Paperwhere 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 ToxicsUNITED STATES ENVIRONMENTAL PROTE C T I ON AGENC Y 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 O F C HE M IC A L SAFETY AN D PO LLUT I ON P R E V E N T I O N

On April 4, 2014, and under the Toxic Substance Control Act (TSCA), the United States Environmental Protection Agency (EPA) is s ued a testing consent order (Order) that incorporates an enforceable con sent agreement (ECA) with Dow Corning Corporation, Evonik Corporation , Momentive Performance Materials USA , Inc., Shin

-Etsu Silicones of America, Inc. , and Wacke r 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 sed iment dwell ing organisms to 04 , contributing to EPA's efforts to understand potential envi r onmental effects of 04. D 4 is widely used as a chemica l intermediate and component of personal care products. The purpose o f this letter is to ask your cooperation in allo wing your wastewater treatment plant (WWTP) to serve as one of the environmenta l testing locati ons. Under the agreement between the EPA and the Companies, envi ronmen tal testing will be performed at select locations throughout the United S tates , including at WWTP s that primar il y serve residential customers as well as at WWTPs that serve industrial dischargers that process or formulate w ith D4. The Companies have already received a participation commitment from several WWTPs. In an effort to secure the additional plants required to meet the env ironmental testing requirements of this ECA, your WWTP has been identified as a candidate to be a testing location . This testing i s narrowly focused, minimally intrusive , and shou ld not interfe r e with your plant' s normal operations. This program will focus exc lusively 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 s ite visit to confirm sampling location s/log ist i cs and twice to conduct the actual sampli ng (two events at least three months apart during norma l 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) • h tt p /lwww epa gov Recyc led / Rec yc l able • Pnnted w1th Vegel a ble 011 Based In ks 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 TaxiesUNITED STATES ENVIRONMENTAL PROTECTION AGENCY WASHINGTON, 0 C. 20460

Brian J. Smith Plant Operations Manager Water Services Department Carter Creek Wastew ater Treatment Plant 2200 North Forest Parkway College S tation , Texas 77845 Dear Mr. Smith: 

## DEC- 4 2014 OFFICE OF CHEMICAL SAFETY AND POLLUTION PREVENTION

On April4, 2014, and under the Toxic Substance Cont rol Act (TSCA) , the United States E nvironmental Protection Agency (EPA) issued a te sting consent order (Order) that incorporates an enforceable con se nt agreement (ECA) with Dow Corning Corporation , Evo nik Corporation, Mom entive Performance Material s USA, Inc., Shin-Etsu Silicones of America, Inc., and Wacker Chemical Corporation (the Companies). T he Companies have agreed to certain environmental testing that will be used by the EPA to characterize so urces and pathway s 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 envi ronmental effects of D4. D4 is widely used as a chemical intermediate and component of perso n al 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 e nv ironmental testing locations. Under the agreement between the EPA and the Companies, environmenta l testing will be performed at select locations throughout the United States, including at WWTPs that primaril y serve residential customers as well as at WWTPs that serve industrial dischargers that process or formulate with D4. The Companies have already received a participati on commitment from several WWTPs. In an effort to secure the additional plants required to meet the environmental te sting requirements of this ECA, your WWTP has been identified as a candidate to be a testin g location

. This testing is narrowly focused, minimally intrusive , and should not interfere with yo ur p lant' s norma l 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 s hould only need access to yo ur site three times: o nce for an initial site vis it to confirm sampling locations/logistics and twice to conduct the actual sampling (two even ts at least three m onth s 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 TaxiesUNITED STATES ENVIRONMENTAL PROTECTION AGENCY WASHINGTON, 0 C 20460

Andrew Burroughs Tuscaloosa Wastewater Treatment Plant 3900 Kauloosa Avenue Tuscaloosa, Alabama 3540 1 Dear Mr. Burroughs: 

## DEC -4 2014

OFFICE OF CHEMICAL SAFETY AND POLLUTION PREVENTION

On April 4, 2014 , and under the Toxic Substance C ontrol Act (TSCA), the United States Environmental Protection Agency (EPA) issued a te sting 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 Com panies). The Companies have agreed to certain environmental testing that will be used by the EPA to characterize sources and pathway s of re lease of octamethylcyclotetrasiloxane (D4) (CAS No. 556-67-2) to the environment and re sulting 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 te sting locations. Under the agreement between the EPA and the Com panies , environmental tes ting will be performed at select lo cations throughout the United S tates , including at WWTPs that pr imaril y 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 me et the environmental testing requirements of this ECA, your WWTP has been identified as a candidate to be a testing location. Thi s 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

. Th ey should only need access to your site three times: once for an initial site visit to confirm sampling l ocations/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 TaxiesUNITED STATES ENVIRONMENTAL PROTECTION AGENCY WASHINGTON DC 20460

Jamie Dillard Southport Wastewater Treatment Plant 3880 West Southport Indi anapolis, Indiana 46217 Dear Mr. D illard: 

## DEC -4 2014 OFFICE OF CHEMICAL SAFETY AND POLLUTION PREVENTION

On April4, 2014 , and under the Toxic Substance Cont ro l Act (TS CA) , the United States Environmental Protection Agency (EPA) issued a testing consent o rder (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 us ed by the EPA to characteri ze sources a nd pathway s of release of octamethylcyclotetrasiloxane (04) (CAS No. 556-67-2) to the environment and resulting exposures of aquatic and sed iment dwelling organisms to D4 , contributing to E PA's efforts to understand potential environmenta l 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 yo ur 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 b e performed at select loca tions throughout the United States, including at WWTPs that primarily serve residential customers as well as at WWTPs that serve industrial dischargers that process or formu late 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 shou ld 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 wate r, and sed iment 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 TaxiesUNITED STATES ENVIRONMENTAL PROTECTION AGENCY WASH IN GTON, D.C. 20 460



### Frank Crump City of Winston
- Salem 2801 Griffith Road Winston Salem, North Carolina 27103 Dear Mr. Crump: 

## DEC -4 2014
OFF I CE 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) th at 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 e nvironmental testing that will be used by the EPA to characteri ze 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 , contr ibuting 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 as k 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, envi ronmental testing will be performed at select locations throughout the United States, including at WWT Ps that primarily ser ve residential customers as well as at WWTP s that serve indus trial dischargers that process or formu late 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 testin g locat ion

. This tes ting is narrowly focused, minimally intru s ive, and should not interfere with yo ur plant's normal operations. This program will focus exclusively on the fate ofD4 in wastewater and environmenta l media. The Companies have hired a consultant to perform the moni toring. They should only need access to your site three times: once for an initial site vi sit to confirm sampling locations/ logistics and twice to conduct the actual sampli ng (two events at least three month s apart during normal WWTP operations)

. During the two sampli ng events, they would sample infl uent, 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 Recyc l ed/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