35350 Federal Register / Vol. 80, No. 118 / Friday, June 19, 2015 / Notices 
may claim all or part of a response 
confidential. EPA will disclose information that is covered by a claim of confidentiality only to the extent permitted by, and in accordance with, the procedures in TSCA section 14 and 40 CFR part 2. 
Burden statement: The annual public 
reporting and recordkeeping burden for this collection of information is estimated to average 31.5 hours per response. Burden is defined in 5 CFR 1320.3(b). 
The ICR, which is available in the 
docket along with other related materials, provides a detailed explanation of the collection activities and the burden estimate that is only briefly summarized here: 
Respondents/Affected Entities: 
Entities potentially affected by this ICR are companies that manufacture, process or import chemical substances, mixtures or categories. 
Estimated total number of potential 
respondents: 1. 
Frequency of response: On occasion. 
Estimated total average number of 
responses for each respondent: 1. 
Estimated total annual burden hours: 
31.5 hours. 
Estimated total annual costs: $2,388. 
This includes an estimated burden cost 
of $2,388 and an estimated cost of $0 for capital investment or maintenance and operational costs. 
III. Are There Changes in the Estimates 
from the Last Approval? 
There is a decrease of 916 hours in the 
total estimated respondent burden compared with that identified in the ICR currently approved by OMB. This decrease reflects additional both adjustment changes from a reduction in the assumed number of PAIR reports filed annually, and program changes resulting from mandatory electronic submissions of PAIR reports. In recent years (FY 2011–FY 2014), EPA has received no PAIR submissions and, for the purposes of this analysis, EPA assumes an annual rate of one submission per year. At the time OMB last renewed this ICR, EPA estimated an average of 33 reports from 14.8 submitters based on fiscal year 2006– 2010 data. The ICR supporting statement provides a detailed analysis of the change in burden estimate. This change is both an adjustment and a program change. 
IV. What is the Next Step in the Process 
for this ICR? 
EPA will consider the comments 
received and amend the ICR as appropriate. The final ICR package will then be submitted to OMB for review and approval pursuant to 5 CFR 1320.12. EPA will issue another Federal Register document pursuant to 5 CFR 
1320.5(a)(1)(iv) to announce the submission of the ICR to OMB and the opportunity to submit additional comments to OMB. If you have any questions about this ICR or the approval process, please contact the technical person listed under 
FOR FURTHER  
INFORMATION CONTACT . 
Authority: 44 U.S.C. 3501 et seq. 
Dated: June 10, 2015. 
James Jones, 
Assistant Administrator, Office of Chemical 
Safety and Pollution Prevention. 
[FR Doc. 2015–14946 Filed 6–18–15; 8:45 am] 
BILLING CODE 6560–50–P 
ENVIRONMENTAL PROTECTION 
AGENCY 
[EPA–HQ–OPPT–2015–0305; FRL–9928–69] 
Use of High Throughput Assays and Computational Tools; Endocrine Disruptor Screening Program; Notice of Availability and Opportunity for Comment 
AGENCY : Environmental Protection 
Agency (EPA). 
ACTION : Notice. 
SUMMARY : This document describes how 
EPA is planning to incorporate an alternative scientific approach to screen chemicals for their ability to interact with the endocrine system. This will improve the Agency’s ability to fulfill its statutory mandate to screen pesticide chemicals and other substances for their ability to cause adverse effects by their interaction with the endocrine system. The approach incorporates validated high throughput assays and a computational model and, based on current research, can serve as an alternative for some of the current assays in the Endocrine Disruptor Screening Program (EDSP) Tier 1 battery. EPA has partial screening results for over 1800 chemicals that have been evaluated using high throughput assays and a computational model for the estrogen receptor pathway. In the future, EPA anticipates that additional alternative methods will be available for EDSP chemical screening based on further advancements of high throughput assays and computational models for other endocrine pathways. Use of these alternative methods will accelerate the pace of screening, decrease costs, and reduce animal testing. In addition, this approach advances the goal of providing sensitive, specific, quantitative, and efficient screening using alternative test 
methods to some assays in the Tier 1 battery to protect human health and the environment. 
DATES : Comments must be received on 
or before August 18, 2015. 
ADDRESSES : Submit your comments, 
identified by docket identification (ID) number EPA–HQ–OPPT–2015–0305, by one of the following methods: 
•Federal eRulemaking Portal: http:// 
www.regulations.gov. Follow the online 
instructions for submitting comments. Do not submit electronically any information you consider to be Confidential Business Information (CBI) or other information whose disclosure is restricted by statute. 
•Mail: Document Control Office 
(7407M), Office of Pollution Prevention and Toxics (OPPT), Environmental 
Protection Agency, 1200 Pennsylvania Ave. NW., Washington, DC 20460–0001. 
•Hand Delivery: To make special 
arrangements for hand delivery or delivery of boxed information, please follow the instructions at http://www.epa.gov/dockets/contacts.html. 
Additional instructions on 
commenting or visiting the docket, along with more information about dockets generally, is available at http:// 
www.epa.gov/dockets. 
FOR FURTHER INFORMATION CONTACT : For 
technical information contact: Jane Robbins, Office of Science Coordination and Policy (OSCP), Office of Chemical Safety and Pollution Prevention, Environmental Protection Agency, 1200 Pennsylvania Ave. NW., Washington, DC 20460–0001; telephone number: (202) 564–6625; email address: robbins.jane@epa.gov. 
For general information contact: The 
TSCA-Hotline, ABVI-Goodwill, 422 South Clinton Ave., Rochester, NY 14620; telephone number: (202) 554– 1404; email address: TSCA-Hotline@epa.gov. 
SUPPLEMENTARY INFORMATION : 
I. General Information 
A. Does this action apply to me? 
This action is directed to the public 
in general, and may be of interest to a 
wide range of stakeholders including those interested in endocrine testing of chemicals (including pesticides), and the EDSP in general. Since others also may be interested, the Agency has not attempted to describe all the specific entities that may be affected by this action. 
B. What is the agency authority for 
taking this action? 
The EDSP is established under section 
408(p) of the Federal Food, Drug and 
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Cosmetic Act (FFDCA), 21 U.S.C. 
346a(p). Section 408(p)(1) requires EPA ‘‘to develop a screening program, using appropriate validated test systems and other scientifically relevant information to determine whether certain substances may have an effect in humans that is similar to an effect produced by a naturally occurring estrogen, or such other effects as [EPA] may designate.’’ [21 U.S.C. 346a(p)(1)]. Section 408(p)(2) requires that the screening program be implemented ‘‘after obtaining public comment and review . . . by the scientific advisory panel established under section 25(d) of the Federal Insecticide, Fungicide, and Rodenticide Act. . .’’ [21 U.S.C. 346a(p)(2)]. 
This document describes the new 
scientific methods that are available as alternatives to some of the current EDSP Tier 1 screening assays and solicits public comment on EPA’s plan to use these alternative approaches to screen chemicals for their ability to interact with the endocrine system. The approach described in this document is not binding on either EPA or any outside parties, and EPA may depart from the approach presented in this document where circumstances warrant and without prior notice. 
C. What action is the agency taking? 
This document describes and solicits 
comments on how EPA is planning to 
incorporate scientific advancements and tools into the EDSP. The adoption of scientific advancements into the EDSP has been underway and part of the public dialogue about EDSP for several 
years. As EPA has consistently indicated, the Agency intends to continue to incorporate in the EDSP new methods involving high throughput assays and computational toxicology. Also, EPA has identified a universe of approximately 10,000 chemicals as potential candidates for screening and testing under the EDSP (Ref. 1). This approach is expected to accelerate the pace of screening, add efficiencies, decrease costs, and reduce animal testing. 
EPA is planning to incorporate the 
partial screening results from validated high throughput assays and computational models as an alternative to data from some of the current assays in the EDSP Tier 1 screening battery. Currently, EPA has partial screening results for over 1800 chemicals that have been evaluated using the high throughput assays and computational model for the estrogen receptor pathway. 
The use of high-throughput assays 
and computational models for EDSP screening is an initial step in EPA’s integration of 21st-century integrated assessment and testing approaches broadly, beyond EDSP, across a wide range of chemicals related to regulatory and non-regulatory decisions made in programs under the Agency’s purview (Ref. 2). Much of the knowledge gained in using these approaches for EDSP screening will be useful in applying high throughput assays and computational models to thousands of chemicals across many toxicological endpoints and exposure scenarios. 
D. What should I consider as I prepare 
my Comments for EPA? 
1. Submitting CBI. Do not submit this 
information to EPA through regulations.gov or email. Clearly mark the part or all of the information that you claim to be CBI. For CBI information in a disk or CD–ROM that you mail to EPA, mark the outside of the disk or CD–ROM as CBI and then identify electronically within the disk or CD–ROM the specific information that is claimed as CBI. In addition to one complete version of the comment that includes information claimed as CBI, a copy of the comment that does not contain the information claimed as CBI must be submitted for inclusion in the public docket. Information so marked will not be disclosed except in accordance with procedures set forth in 40 CFR part 2. 
2. Tips for preparing your comments. 
When preparing and submitting your comments, see the commenting tips at http://www.epa.gov/dockets/comments.html. 
II. Background A. What is the Endocrine Disruptor 
Screening Program (EDSP)? 
The Food Quality Protection Act 
(FQPA) of 1996 amended FFDCA to require EPA ‘‘to develop a screening program, using appropriate validated test systems and other scientifically relevant information, to determine whether certain substances may have an effect in humans that is similar to an effect produced by a naturally occurring estrogen, or such other effects as [EPA] may designate’’ (21 U.S.C. 346a(p)(1)). Also in 1996, the Agency chartered the Endocrine Disruptor Screening and Testing Advisory Committee (EDSTAC), under the provisions of the Federal Advisory Committee Act (FACA) (5 U.S.C. App. 2, section 9(c)), to provide advice on developing an endocrine disruptor screening program (Ref. 3). The EDSTAC was comprised of members representing the commercial chemical and pesticides industries, Federal and State agencies, worker protection and labor organizations, 
environmental and public health groups, and research scientists. EDSTAC recommended that EPA’s program address both potential human and wildlife effects; examine effects on estrogen, androgen, and thyroid hormone-related processes; and include non-pesticide chemicals, contaminants, and mixtures in addition to pesticide chemicals (Ref. 2). 
In 1998, based on the EDSTAC 
recommendations, EPA established the EDSP using a two-tiered approach (Ref. 4). The purpose of Tier 1 (referred to as ‘‘screening’’) is to identify substances that have potential biological activity (‘‘bioactivity’’) in the estrogen, androgen, or thyroid hormone pathways using a battery of assays. The purpose of Tier 2 (referred to as ‘‘testing’’) is to identify and establish a dose-response relationship for any adverse effects that might result from the endocrine bioactivity identified through the Tier 1 assays. The ultimate purpose of the EDSP is to provide information to the Agency that will allow the Agency to evaluate any possible endocrine effects associated with the use of a chemical and take appropriate steps to mitigate any related risks to ensure protection of public health. 
In 2009, the Agency issued test orders 
requiring Tier 1 screening for 67 chemicals (‘‘List 1’’) (Ref. 5). Between the time needed to review the substantial volume of ‘‘other scientifically relevant information’’ submitted by test order recipients to satisfy selected screening assays, the time and resources of industry spent generating data, the time spent by the Agency reviewing the information, and the delays resulting from the limited laboratory capacity for conducting many of the Tier 1 assays and corresponding 
time extension requests, the review of the initial List 1 chemicals has taken over four years and has imposed significant burdens on test order recipients and the agency. The Agency is still finalizing the data evaluation records and determinations concerning which of the List 1 chemicals need further Tier 2 testing. More information on the EDSP history and the status of current activities is available at http://www.epa.gov/endo. 
B. What is meant by ‘‘high throughput 
assays and computational model’’? 
High throughput assays are automated 
methods that allow for a large number of chemicals to be rapidly evaluated for a specific type of bioactivity at the molecular or cellular level. This approach, which can help identify compounds that may modulate specific 
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biological pathways, was initially 
developed by pharmaceutical companies for drug discovery. The results of these methods provide an initial understanding of a biochemical interaction or possible role of a chemical in a given biological process. In vitro high throughput assays are usually conducted using a microtiter plate: a plate containing a grid with a large number of small divots called ‘‘wells.’’ The wells contain chemical and/or biological substrate ( e.g., living 
cells or proteins). Depending on the nature of the experiment, changes can be detected (e.g., color, fluorescence, 
etc.) when the chemical is added to indicate whether there is bioactivity. High throughput microtiter plates typically come in multiples of 96 wells (96, 384, or 1536), so that through the use of robotics, data processing and control software, liquid handling devices, and sensitive detection methods, an extremely large number of chemicals can be evaluated very efficiently. 
High throughput assays can be run for 
a range of test chemical concentrations and produce concentration-response information representing the relationship between chemical concentration and bioactivity. The concentration-response data from multiple assays can be mathematically integrated in a computational model of a biological pathway, providing values representative of a chemical’s bioactivity in that pathway (e.g., estrogen receptor pathway). To reduce non-specific results, the computational model can use results from multiple assays and technologies to predict whether a chemical is truly bioactive in the pathway being evaluated. The most prominent cause of non-specific results (activity in an assay that is likely not due to bioactivity of the chemical in the pathways) is cytotoxicity in cell-based assays. In other cases, chemicals influence the assays through a manner dependent on the physics and chemistry of the technology platform (i.e., ‘‘assay 
interference’’). 
C. What is ToxCast
TM? 
To improve efficiencies in screening 
and testing chemicals, EPA scientists 
are harnessing advances in molecular and systems biology, chemistry, toxicology, mathematics, and computer technology. In doing this, they are helping to revolutionize chemical screening and safety testing based on advances in computational toxicology. A major part of this effort is the Agency’s Toxicity Forecaster, or ToxCast
TM, which uses automated, 
robotics-assisted high throughput assays to expose living cells or proteins to 
chemicals and measure the results. The high throughput assays produce concentration-response information representing the relationship between chemical concentration and bioactivity. These innovative methods have the potential to quickly and efficiently screen large numbers of chemicals and other substances. ToxCast
TMis part of 
EPA’s contribution to a federal research collaboration called ‘‘Toxicity Testing in the 21st Century’’, or ‘‘Tox21,’’ pooling resources and expertise from EPA, the National Institutes of Health and the U.S. Food and Drug Administration to use robotics for screening thousands of chemicals for potential bioactivity (Ref. 6). 
As part of EPA’s commitment to 
gather and share its chemical data openly and clearly, all ToxCast
TM 
chemical data are publicly available through user-friendly web applications called the interactive Chemical Safety for Sustainability (iCSS) and EDSP21 dashboards (Refs. 7 and 8). The EDSP21 and iCSS dashboards provide accessible portals for users to search and query the ToxCast
TMchemical data. Users can 
review chemicals and data of interest, as well as export the information. Making ToxCast
TMdata available through the 
dashboards creates an environment that encourages external stakeholder interactions identifying potential issues, concerns, and suggesting improvements. 
D. What is meant by the ToxCast
TMER 
Model for bioactivity? 
The ToxCastTMER Model for 
bioactivity (‘‘ER Model’’) includes data 
from 18 estrogen receptor (ER) high throughput assays from ToxCast
TMthat 
detect multiple events in the receptor pathway. The ER Model also includes a computational module that integrates the assay data to produce a value for ER agonist and antagonist bioactivity for each chemical (Ref. 9). An ER agonist binds and activates the receptor, and an antagonist binds and blocks activation. These 18 high throughput assays measure bioactivity at different sites along the ER pathway including receptor binding, receptor dimerization, chromatin binding of the mature 
transcription factor, gene transcription and changes in estrogen-receptor growth kinetics. Bioactivity (i.e., response) is 
measured using various detection methods (e.g., fluorescence, etc.) across 
a range of concentrations to examine potential concentration-response relationships, including no change across concentrations indicating no bioactivity. Concentration-response relationships for each assay are mathematically integrated in the ‘‘ER Model’’ to quantify bioactivity from 
multiple assays. The computational model integrates the results of each of the 18 ER assays as an area under the curve (AUC) for ER agonist or antagonist bioactivity for each chemical. The bioactivity values generally range from 0 to 1 for each chemical, with 0 indicating no bioactivity and 1 approximating the positive reference chemical (e.g., estradiol for ER 
agonism). 
In order to validate the ER Model, 
ToxCast
TMdata have been collected and 
reviewed on over 1800 chemicals, including ER reference agonists and antagonists (Ref. 10). ER agonist and antagonist bioactivity scores from the ‘‘ER Model’’ compare very well with reported bioactivity of reference chemicals across a range of structures and potencies. Of the over 1800 chemicals tested, over 1700 chemicals had very low or no detectable ER bioactivity (Ref. 10). The ‘‘ER Model’’ 
bioactivity scores were validated by comparing the scores to 45 reference chemicals, equivalent to a performance- based approach to validation. EPA also compared ‘‘ER Model’’ results to a database of curated uterotrophic studies published in peer-reviewed literature. ER agonist bioactivity scores accurately predicted in vivo ER agonist activity for 
a large set (∼150) of chemicals with uterotrophic data (Refs. 9 and 11). The validation of the ‘‘ER Model’’ as an alternative screening method for three current Tier 1 assays (ER binding, ER transcriptional activation (ERTA), and uterotrophic) was peer reviewed by the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) Scientific Advisory Panel (SAP) in December 2014 (Refs. 9 and 11). The FIFRA SAP fully endorsed the use of these alternatives for the ER binding and ERTA assays; however, there was not consensus among panel members on the use of the ‘‘ER Model’’ as an alternative for the uterotrophic assay (Ref. 11). In response to the concerns raised by the FIFRA SAP, EPA has published a paper clarifying the relationship between ‘‘ER Model’’ bioactivity and uterotrophic results, and illustrating that a uterotrophic assay would provide no added value if ‘‘ER Model’’ data are available (Ref. 12). Based on these findings, EPA concludes that ‘‘ER Model’’ data are sufficient to satisfy the Tier 1 ER binding, ERTA and uterotrophic assay requirements. The Agency intends to build on the performance-based validation approach presented at the December 2014 FIFRA SAP expanding this approach to include 
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other key events in the estrogen 
pathway. 
III. Using High Throughput Assays and 
Computational Models for Screening 
A. How Will ToxCastTMdata be used for 
screening in the EDSP? 
The ability to screen chemicals 
rapidly for bioactivity in several 
endocrine pathways, and reducing the use of animals in testing, have been EDSP goals since 1998, when the program was first adopted (Ref. 4). As previously noted, when the first Tier 1 orders (for List 1 chemicals) were issued in 2009, EPA had not confirmed the reliability and relevance of the ToxCast
TMresults so that they could be 
cited as ‘‘other scientifically relevant information’’ to satisfy the Tier 1 ER binding, ERTA, and uterotrophic assays (Ref. 13). However, since that time, EPA has reached a critical juncture, determining that the science has progressed such that reevaluation of EPA’s earlier position is warranted. Based on scientific advances, EPA intends to implement the use of high throughput assays and computational models to evaluate, and to a significant extent, screen chemicals. The in vitro high throughput and computational model alternatives provide an accurate quantitative measure of specific endocrine pathway bioactivity and mechanisms. The current Tier 1 battery includes animal-based assays that do not clearly identify or differentiate pathways and mechanisms. Specifically, the current Tier 1 ER binding, ERTA and uterotrophic assays do not provide both estrogen agonist and antagonist activity and animals are required to conduct the ER binding and uterotrophic assays. 
EPA is planning to adopt in vitro high 
throughput assays and computational models for detecting and measuring ER agonist and antagonist bioactivity as an alternative for three current Tier 1 assays: 1) ER binding in vitro assay (Ref. 
14); 2) ER transcriptional activation in vitro assay (ERTA) (Ref. 15); and 3) in 
vivo uterotrophic assay (Refs. 16 and 
17). EPA is also planning to accept 
existing results for chemicals that have been evaluated using the ToxCast
TM 
‘‘ER Model’’ for bioactivity. The accompanying database contains the ER agonist bioactivity and ER antagonist bioactivity for over 1800 chemicals and identifies those chemicals that are 
pesticide active ingredients, pesticide inert ingredients, and on EDSP Lists 1 or 2 (Ref. 10). This is a ‘‘living’’ database that will continue to incorporate bioactivity results for chemicals as they become available. This database is available at http://www.epa.gov/endo and in the docket identified for this document in a format that can be easily reviewed and manipulated electronically (Ref. 10). It is important, 
however, not to equate a determination of a chemical’s bioactivity from the ‘‘ER Model’’ with a determination that a chemical causes endocrine disruption. The World Health Organization (WHO)/ 
International Programme on Chemical 
Safety (IPCS) defines endocrine disruption as being caused by ‘‘an exogenous substance or mixture that alters function(s) of the endocrine system . . . and . . .consequently causes adverse health effects in an intact organism or its progeny, or (sub)populations’’ (Ref. 18). Bioactivity 
is an indicator that a chemical has the potential to alter endocrine function, but (1) whether the chemical actually alters endocrine function and (2) whether that altered function produces an adverse outcome in an intact animal cannot be determined without further testing (i.e., Tier 2 testing). 
The EDSP has been developed over 
the past 19 years, and has demonstrated that the current screening process may take upwards of 5 years before a Tier 1 decision is available or Tier 2 test orders are issued. In light of recent advances in high throughput assays and computational models, and advances likely to come in the next two years, it is prudent for the Agency to consider new, rapid screening methods. The availability of additional alternative high throughput assays and computational models in the near term will allow EPA to screen more chemicals in less time, involve fewer animals, and cost less for everyone. Furthermore, reconsideration of the EDSP List 2 chemicals may be appropriate since ‘‘ER Model’’ data are available for many List 2 and other chemicals (Refs. 10 and 19). Ongoing use of high throughput assays and computational models will address thousands of chemicals in the future. 
These advancements in the EDSP 
screening program will not affect the overall framework—i.e., the Tier 1 
screening battery and Tier 2 testing 
approach focused on estrogen, androgen and thyroid pathways in humans and wildlife remains unaffected. Instead, as discussed above, EPA is planning to adopt sensitive, specific, quantitative, and efficient screening methods that will rapidly screen many chemicals and substantially decrease costs and animal use and may be used as an alternative to some EDSP Tier 1 screening assays. Accordingly, EPA intends a future recipient of an EDSP test order to be able to satisfy the screening requirement for ER, ERTA, and uterotrophic in one of three ways: (1) cite existing ToxCast
TM‘‘ER Model’’ for bioactivity 
data as ‘‘other scientifically relevant information’’ (where available); (2) generate new data relying on the 18 ER high throughput assays and the ToxCast
TM‘‘ER Model’’ for bioactivity; 
or (3) generate their own data using the current Tier 1 ER binding, ERTA, and uterotrophic assays. 
B. How Does EPA intend to use high 
throughput assays and computational models for the EDSP in the future? 
EPA believes that ongoing adoption of 
alternative methods and technologies will continue to advance EDSP screening of chemicals for bioactivity in the estrogen, androgen, and thyroid pathways. EPA is continuing research on the ‘‘ER Model’’ to determine if 
ToxCast
TMassays can provide 
comparable information as that of the Female Rat Pubertal and the Fish Short Term Reproduction assays. In addition, research continues on the ToxCast
TM 
‘‘AR Model’’ for bioactivity which, if fully validated, may be considered as an alternative (alone or with the ‘‘ER Model’’) for the following current Tier 1 assays: AR binding, Male Rat Pubertal, Hershberger, and Fish Short Term Reproduction. Research is also underway to develop steroidogenesis ToxCast
TM(STR) and thyroid (THY) 
bioactivity models. Over time, the Agency’s goal is to develop a set of ‘‘non-animal’’ high throughput assays and computational bioactivity models as an alternative to all of the assays in the current Tier 1 screening battery. The following table is intended to illustrate the evolution of screening in the EDSP: 
Current EDSP Tier 1 battery of assays Alternative high throughput assays and computational model for EDSP 
Tier 1 battery 
Estrogen Receptor (ER) Binding .............................................................. ER Model (alternative). 
Estrogen Receptor Transactivation (ERTA) ............................................. ER Model (alternative). 
Uterotrophic .............................................................................................. ER Model (alternative ). 
Female Rat Pubertal ................................................................................ ER, STR , and thyroid (THY) Models (Future). 
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Current EDSP Tier 1 battery of assays Alternative high throughput assays and computational model for EDSP 
Tier 1 battery 
Male Rat Pubertal ..................................................................................... AR, STR, and THY Models (Future). 
Androgen Receptor (AR) Binding ............................................................. AR Model (Future). 
Hershberger .............................................................................................. AR Model (Future). 
Aromatase ................................................................................................ STR Model (Future). 
Steroidogenesis (STR) ............................................................................. STR Model (Future). 
Fish Short Term Reproduction ................................................................. ER, AR, and STR Models (Future). 
Amphibian Metamorphosis ....................................................................... THY Model (Future). 
The table indicates combinations of 
various alternative assays and models 
that might overlap for evaluating potential endocrine bioactivity of chemicals. The in vitro high throughput and computational model alternatives provide a focused evaluation of the mechanistic aspects of endocrine pathways, thereby providing specific and quantitative measures of bioactivity. Several assays in the Tier 1 battery rely on intact animals and identify bioactivity in the multiple biological pathways present. For this reason, the specificity of the in vitro high 
throughput and computational model alternatives may be more informative of specific endocrine pathway bioactivity. 
The annual EDSP Comprehensive 
Management Plan and future FIFRA SAP meetings are opportunities for staying informed on EPA’s scientific progress on the evolution of Tier 1 screening in the EDSP. For information, visit EPA’s Web site (http://www.epa.gov/endo ) or sign-up to 
receive announcements go to (http://www.epa.gov/endo/pubs/assayvalidation/listserv.htm ). 
IV. Issues for Comment 
In connection with EPA’s stated 
intention to use the scientific tools discussed in this Notice as alternatives to some of the current EDSP Tier 1 screening assays, EPA is specifically seeking public comment on the following: 
1. The use of the ToxCast
TM‘‘ER 
Model’’ for bioactivity as an alternative method for the current ER binding and ERTA Tier 1 screening assays. 
2. The use of the ToxCast
TM‘‘ER 
Model’’ for bioactivity as an alternative method for the current uterotrophic Tier 1 screening assay. 
3. The use of results from the 
ToxCast
TM‘‘ER Model’’ for bioactivity 
on over 1800 chemicals as partial screening for the estrogen receptor pathway. 
V. References 
The following is a listing of the 
documents that are specifically 
referenced in this document. The docket includes these documents and other information considered by EPA, including documents that are referenced within the documents that are included in the docket, even if the referenced document is not physically located in the docket. For assistance in locating these other documents, please consult the technical person listed under 
FOR 
FURTHER INFORMATION CONTACT . 
1. U.S. EPA. Endocrine Disruptor Screening 
Program; Universe of Chemicals and 
General Validation Principles. November 2012. Available at http://www.epa.gov/endo/pubs/edsp _chemical_ universe_
and_ general_ validations_ white_ paper_
11_12.pdf. 
2. U.S. EPA. Endocrine Disruptor Screening 
Program for the 21st Century: (EDSP21 Work Plan); The Incorporation of In Silico Models and In Vitro High Throughput Assays in the Endocrine Disruptor Screening Program (EDSP) for Prioritization and Screening; Summary Overview. A Part of the EDSP Comprehensive Management Plan. September 30, 2011. Available at http:// 
www.epa.gov/endo/pubs/edsp21 _work_
plan_ summary%20_ overview_ final.pdf. 
3. U.S. EPA. Endocrine Disruptor Screening 
and Testing Advisory Committee (EDSTAC); Final Report. August 1998. Available at http://www.epa.gov/endo/pubs/edspoverview/finalrpt.htm. 
4. U.S. EPA. Endocrine Disruptor Screening 
Program; Proposed Statement of Policy; Notice. Federal Register (63 FR 71542, 
December 28, 1998) (FRL–6052–9). 
5. U.S. EPA. Endocrine Disruptor Screening 
Program; Tier 1 Screening Order Issuance Announcement; Notice. Federal Register (74 FR 54422, October 21, 2009) 
(FRL–8434–8). 
6. U.S. EPA. Office of Research and 
Development (ORD); Description of 
Computational Toxicology Research Program. Available at http://epa.gov/ncct. 
7. U.S. EPA. Interactive Chemical Safety for 
Sustainability (iCSS) Dashboard, Version 0.5. Available at http://actor.epa.gov/dashboard. 
8. U.S. EPA. EDSP21 Dashboard. Available at 
http://actor.epa.gov/edsp21. 
9. U.S. EPA. Integrated Bioactivity and 
Exposure Ranking: A Computational Approach for the Prioritization and Screening of Chemicals in the Endocrine Disruptor Screening Program. December 2014. Docket ID No. EPA–HQ–OPP– 2014–0614–0003. Available at http://www.regulations.gov/#!documentDetail;D=EPA–HQ–OPP– 2014–0614–0003. 
10. U.S. EPA. Endocrine Disruptor Screening 
Program (EDSP); Estrogen Receptor 
Bioactivity Based on ToxCa
TM‘‘ER 
Model.’’ June 1, 2015. Available at http:// 
www.epa.gov/endo. 
11. U.S. EPA. FIFRA SAP Minutes No. 2015– 
01. FIFRA SAP Meeting on the Integrated Bioactivity and Exposure-Based Prioritization and Screening, held December 2–4, 2014. Docket ID No. EPA–HQ–OPP–2014–0614–0029. March 2, 2015. Available at http://www.epa.gov/scipoly/sap/meetings/2014/december/120214minutes.pdf. 
12. Browne, P., Judson, R.S., Casey, W., 
Kleinstreuer, N., Thomas, R.S. Screening Chemicals For Estrogen Receptor Bioactivity Using A Computational Model. Manuscript accepted for 
publication. Environ. Sci. Technol. June 
12, 2015. Available in the docket and electronically at http://pubs.acs.org/journal/esthag. 
13. U.S. EPA. Endocrine Disruptor Screening 
Program; Policies and Procedures for Initial Screening; Notice. Federal Register (74 FR 17560, April 15, 2009) 
(FRL–8399–9). Note: the status and progress of all List 1 Tier 1 orders are available at http://www.epa.gov/endo/pubs/toresources/index.htm. 
14. U.S. EPA. Endocrine Disruptor Screening 
Program Test Guidelines; OPPTS 890.1250: Estrogen Receptor Binding Assay Using Rat Uterine Cytosol (ER– RUC). October 2009. EPA 740–C–09–005. Available at http://www.epa.gov/ocspp/pubs/frs/publications/Test _Guidelines/
series890.htm. 
15.U.S.EPA. Endocrine Disruptor Screening 
Program Test Guidelines; OPPTS 890.1300: Estrogen Receptor Transcriptional Activation (Human Cell Line (HeLa-9903)). October 2009. EPA 740–C–09–006. Available at http://www.epa.gov/ocspp/pubs/frs/publications/Test _Guidelines/
series890.htm. 
16.U.S.EPA. Endocrine Disruptor Screening 
Program Test Guidelines; OPPTS 890.1600: Uterotrophic Assay. October 2009. EPA 740–C–09–0010. Available at http://www.epa.gov/ocspp/pubs/frs/publications/Test _Guidelines/
series890.htm. 
17. Organization of Economic Co-operation 
and Development (OECD). Test Guideline No. 440:Uterotrophic Bioassay in Rodents: A short-term screening test for oestrogenic properties. OECD Guidelines for the Testing of Chemicals, Section 4, OECD Publishing, Paris. DOI: http://dx.doi.org/10.1787/ 
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9789264067417-en. 
18. World Health Organization (WHO)/
International Programme on Chemical 
Safety (IPCS). Global Assessment of the State-of-the-Science of Endocrine Disruptors. WHO/IPCS/EDC/02.2. 2002. Available at http://www.who.int/ipcs/publications/new _issues/endocrine _
disruptors/en. 
19. U.S. EPA. Endocrine Disruptor Screening 
Program; Final Second List of Chemicals and Substances for Tier 1 Screening; Notice. Federal Register (78 FR 35922, 
June 14, 2013) (FRL–9375–8). Available at http://www.gpo.gov/fdsys/pkg/FR– 
2013–06–14/pdf/2013–14232.pdf. 
Authority: 21 U.S.C. 346a(p). 
Dated: June 11, 2015. 
James J. Jones, 
Assistant Administrator, Office of Chemical 
Safety and Pollution Prevention. 
[FR Doc. 2015–15182 Filed 6–18–15; 8:45 am] 
BILLING CODE 6560–50–P 
ENVIRONMENTAL PROTECTION 
AGENCY 
[EPA–HQ–SFUND–2006–0361; FRL—9929– 
32–OSWER] 
Proposed Information Collection 
Request; Comment Request; Trade Secret Claim Submissions under the Emergency Planning and Community Right-to-Know Act. 
AGENCY : Environmental Protection 
Agency (EPA). 
ACTION : Notice. 
SUMMARY : The Environmental Protection 
Agency (EPA) is planning to submit an information collection request (ICR), ‘‘Trade Secret Claims Submitted under the Emergency Planning and Community Right-to-Know Act.’’ (EPA ICR No. 1428.10, OMB Control No. 2050–0078) to the Office of Management and Budget (OMB) for review and approval in accordance with the Paperwork Reduction Act. Before doing so, EPA is soliciting public comments on specific aspects of the proposed information collection as described below. This is a proposed extension of the ICR, which is currently approved through December 31, 2015. An Agency may not conduct or sponsor and a person is not required to respond to a collection of information unless it displays a currently valid OMB control number. 
DATES : Comments must be submitted on 
or before August 18, 2015. 
ADDRESSES : Submit your comments, 
referencing Docket ID No. EPA–HQ– SFUND–2006–0361, online using www.regulations.gov (our preferred 
method), by email to superfund.docket@epa.gov, or by mail 
to: EPA Docket Center, Environmental Protection Agency, Mail Code 28221T, 1200 Pennsylvania Ave. NW., Washington, DC 20460. 
EPA’s policy is that all comments 
received will be included in the public docket without change including any personal information provided, unless the comment includes profanity, threats, information claimed to be Confidential Business Information (CBI) or other information whose disclosure is restricted by statute. 
FOR FURTHER INFORMATION CONTACT : Sicy 
Jacob, Office of Emergency Management, Mail Code 5104A, Environmental Protection Agency, 1200 Pennsylvania Ave. NW., Washington, DC 20460; telephone number: (202) 564–8019; fax number: (202) 564–2620; email address: jacob.sicy@epa.gov. 
SUPPLEMENTARY INFORMATION : 
Supporting documents which explain in detail the information that the EPA will be collecting are available in the public docket for this ICR. The docket can be viewed online at www.regulations.gov or in person at the EPA Docket Center, WJC West, Room 3334, 1301 Constitution Ave. NW., Washington, DC. The telephone number for the Docket Center is 202–566–1744. For additional information about EPA’s public docket, visit http://www.epa.gov/ dockets. 
Pursuant to section 3506(c)(2)(A) of 
the PRA, EPA is soliciting comments and information to enable it to: (i) evaluate whether the proposed collection of information is necessary for the proper performance of the functions of the Agency, including whether the information will have practical utility; (ii) evaluate the accuracy of the Agency’s estimate of the burden of the proposed collection of information, including the validity of the methodology and assumptions used; (iii) enhance the quality, utility, and clarity of the information to be collected; and (iv) minimize the burden of the collection of information on those who are to respond, including through the use of appropriate automated electronic, mechanical, or other technological collection techniques or other forms of information technology, e.g., permitting electronic submission of 
responses. EPA will consider the comments received and amend the ICR as appropriate. The final ICR package will then be submitted to OMB for review and approval. At that time, EPA will issue another Federal Register notice to announce the submission of the ICR to OMB and the opportunity to submit additional comments to OMB. Abstract: This information collection 
request pertains to trade secrecy claims submitted under Section 322 of the Emergency Planning and Community Right-to-Know Act of 1986 (EPCRA). 
EPCRA contains provisions requiring 
facilities to report to State and local authorities, and EPA, the presence of extremely hazardous substances (Section 302), inventory of hazardous chemicals (Sections 311 and 312) and manufacture, process and use of toxic chemicals (Section 313). 
Section 322 of EPCRA allows a 
facility to withhold the specific chemical identity from these EPCRA reports if the facility asserts a claim of trade secrecy for that chemical identity. The provisions in Section 322 establish the requirements and procedures that facilities must follow to request trade secrecy treatment of chemical identities, as well as the procedures for submitting public petitions to the Agency for review of the ‘‘sufficiency’’ of trade secrecy claims. 
Trade secrecy protection is provided 
for specific chemical identities contained in reports submitted under each of the following: (1) Section 303 (d)(2)- Facility notification of changes that have or are about to occur, (2) Section 303 (d)(3)—Local Emergency Planning Committee (LEPC) requests for facility information to develop or implement emergency plans, (3) Section 311—Material Safety Data Sheets (MSDSs) submitted by facilities, or lists of those chemicals submitted in place of the MSDSs, (4) Section 312—Emergency and hazardous chemical inventory forms (Tier I and Tier II), and (5) Section 313 Toxic chemical release inventory form. 
Form Number: EPA Form 9510–1. 
Respondents/affected entities: Entities 
potentially affected by this action are 
manufacturers or non-manufacturers subject to reporting under Sections 303, 311/312 or 313 of the Emergency Planning and Community Right-to- Know Act (EPCRA). 
Respondent’s obligation to respond: 
Mandatory if the respondents would like to claim the chemical identity for any of the chemicals as trade secret in any of the reports required to be submitted under EPCRA. 
Estimated number of respondents: 
332 (total). 
Frequency of response: Annual for 
claims submitted under EPCRA Sections 312 and 313. 
Total estimated burden: 3,154 hours 
(per year). Burden is defined at 5 CFR 1320.03(b). 
Total estimated cost: $206,155 (per 
year). No capital and operation and 
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