PHOTODEGRADATION TEST SUBSTANCE Identity: Petiuorooctanoic acid, ammonium salt; may also be referred to as PFOA ammonium salt, Ammonium perfluorooctanoate, PFO, FC116 FC 126, FC 169, or FC 143. (Octanoic acid, pentadecafluoro ammonium salt, CAS # 3825 26 l)

Remarks: The test substance used was 14C labeled (358 dpm/ pg). It's purity . was not sufficiently characterized, though current information indicates it is a mixture of 96.5  100% test substance and 0 3.5 CS, CT, and Cg pefluoro analogue compounds. This testing is currently being repeated using current procedures and best available practices.

METH6D:

Method/ guideline followed : Procedure as described in the Federal Register (Volume 43, No. 132 Monday, July IO, 1978) by the U. S. Environmental Protection Agency. Type (test type): Sirr& lated sunlight GLP (Y/ N): No Year completed: 1 979 Light Source: General Electric F 40BL fluorescent black light Light Spectrum (nm): Max output at 360 nm and essentially no output below 300 nm. Spectral energy characterized from 290 600 nm. Intensity:

Wavelength Watts Radiated 290  300 0.090 310  320 0.235 400 500 * I 2.300 I I 500  600 0.340 I Spectrum of substance (max lambda, max epsilon and epsilon 295): Not determined. .

The test solution was created by dissolving 140.0 mg of the test substance in 2.8 liters of distilled water. The resulting solution had a specific activity of 17,320 dpm/ mL (0.0078 pC/ mL).

I . . . _.  _.__ Remarks:

 Test medium: Distilled water  Duration: 30 days  Positive Controls: None  Negative Controls: None Photolyzate samples were collected after irradiation intervals of 0, 1, 3, 7, 15, and 30 days. Samples were analyzed using a Liquid Scintillation Counter (LSC), TLC Autoradiograph and Gas Chromatography.

RESULTS Concentration of Substance: 50 mg/ L Temperature "C: 2252° C `Degradation %: 0% after 30 days Remarks field: No photodegradation of the test substance was detected in this study. Essentially the same analysis results were obtained for the 30 day photolyzate sample (no photoproducts formed) as the O day sample.

Radiocarbon assays at 0 and 30 days also indicate no significant amount of product was volatilized during the study.

CONCLUSIONS No photodegradation products were detected in this study using simulated sunlight, indicating the test substance does not undergo photolysis.

Submitter: 3M Company, Environmental Laboratory, P. O. Box 33331, St. Paul, Minnesota, 55133 DATA QUALITY .Reliabillty: Klimisch ranking 2. Testing meets the criteria for quality testing at the time it was conducted. However, sample purity was not properly characterized.

REFERENCES 3M Technical Report "FC 143 PHOTOLYSIS STUDY USING SIMULATED SUNLIGHT." J. W. Todd, Project 9776750202, Report number 002, February 2, 1979 OTHER Last changed: 5/ 24/ 00 IOlO 1 2 2 79 !31[ 1 . . .

. For& 674FtGA .' TECHNlCAi REPORT SlJMRdikY To: &NW CWMUNlCNlWE CENTER  20% 2CN OlviJon 'Commercial Chemicals Division  Agrichemical Project moo+ Numbor 3068 rroillct Service to TOSCA F N &

R@ Port two 9r77&? 0202 Rafmrt Numbor FC 143 PHOTOLYSIS STUDY USING SIMULATED SUNLIGHT 002 : T o R. A. PROKOP a. . .

AUttWW 3. W. TODD E~ PIOY~ NumWW kotobook m 43953 Agrichemical Request 994 No. ol'w ~~ k N 13 SECURlW) n KEYWORWI &Wct twnu from 3M Tbeaurw. su& jat otbr wPk8bl4tumr)

uto/ Radiography ecomposition nvironment as Chromatography ayer/ Chromatogrwhy hotolysis adiotracer cintillation Information Liriron I*= Investigate the photolyic` stability of FC 143 as a function, of irradiation time and identify any majbr photoproducts.

WOW A8SlRAC'T: (206260 words) Thir abstract informtion is distributed by tf~ fir Twhnical Communications &ntu o hrt 3wm to CQmplrnV R& D.

Irradiation of a 50 ppm aqueous solution of FC 143 for 30 days resulted in no detected photoproducts on analysis by thin layer chromatograpy/ radioautography, and by gas chromatography of derivatized samples. The irradiation source produced 300 nm and longer wavelength ultraviolet light to simulate natural sunlight. . . . .

G034; 54 . . . . .

FC 143/ pHOTOLYSIS STUDY USING SIMULATED SUNLIGHT INTRODUCTION It is generally acknowledged that manufactured chemicals may find their way into the environment in various degrees and by. various means. Once in the environment they may be destroyed or chemically altered by the action of sunlight (Crosby and Li, 1969). This study investigated the, 'possible photodegradation of FC 143 in distilled .water on exposure to simulated sunlight (Kohler, 1965). This study was conducted essentially as recommended by the Environmental Proeckion Agency (Federal Register).

EXPERIMENTAL 1. Sample Materials FC 143 is the ammonium salt of perfluorooctanoic acid.

C7F15COONH4 The major component is the straight chain C7 but some branched chain isomers and other homologs also are present.

FC 143 Water Solution.

A 50 ppm solution of FC 143 14 C (358 dpm/ pg) was prepared by dissolving 140.0 mg of FC 143 in 2.8 liters'of distilled water. The resulting solution had a specific. activity of 17,320 dpm/ ml (O. O078./~ C/ ml).

2. Analysis Instruments/ Materials Liquid Scintillation Counter (LSC) Nuclear Chicago Mark I Rotary Evaporator B'u'chi Rotovapor R Kuderna Danish Concentrator 10 ml concentrator tube  Kontes NO. K 570050 Reflux column  Kontes No. K 569251 Heated water bath GO3655 . . . . II 2

Thin Layer Chromatography (TLC) plates MERCK Silica Gel 60 F 254; 0.25 mm thickness and 20 x 20 cm size ' 1st developing solvent ethyl acetate/ methanol/ water, 75/ 15/ 10 2nd developing solvent methyl ethyl ketone/ chloroform/ acetic acid,

55/ 30/ 15 X Ray Film KODAK NS 2T, 8 x 10 inch size Gas Chromatography System (GC) . Gas Chromatograph  Hewlett Packard Model 5840 Column  6 ft l/ 8 in od stainless steel packed with 20% DC 200 silicone/ lO% BENTONE 34 on Carrier gas ANAKROM ABS (lOO/ llO mesh)  Argon/ methane, 9515 Column temperature  8O* C for 4 minute programed to 180 at SOC/ min. Injection part  on column, 18O* C Detector  electron capture, 300" C Sample injection  1~~ 1 via 10 cl1 microsyringe . '

D I A Z A L D DIAZALD is Aldrich Chemical Company's trade name for N methyl N nitroso p toluenesulfonamide, It is used to prepare diazomethane, an analytical reactant chemical.

Diazomethane solution  Alcohol Free.

Diazomethane (DAM) was used to convert acidified FC 143 into its corresponding methyl ester just prior to gas chromatographic analysis.

C7F15COOH + CH2N2  C7F15COOCH3. + N2 (FC 143 acid) (DAM) (FC 143 methyl ester)

The DAM reagent used must be free of alcohols or the desired reaction product will not form or will degrade after it has formed. T h e alcohol free DAM was prepared essentially .as recommended by Aldrich:

A solvent mixture consisting of 35 ml of 2( 2 ethoxyethoxy) ethanol and 20 ml of diethyl ether was added to a solution of 6 grams of potassium hydrozide dissolved in 10 ml of water. This mixture was c4x3656 . placed in a 100 ml long necked distilling flask fitted with a dropping funnel, an efficient condenser and a water bath at 7OOC. As the distillation of the ether started a solution of 21.5 g of DIAZALD in about 200 ml of ether was added through the dropping funnel over about 20 minutes. The etheral DAM solution was collected in a 250 ml Erlenmeyer flask cooled in an ice bath. The flask contents were transferred into a bottle, a bottle,

sealed with a TEFLON lined cap and stored in a freezer. '

3. Irradiation The preparative photoreactor used (Crosby and Tang, 1969) is . illustrated in Figure 1. The lamp employed was a General Electric F 40BL fluorescent black light with maximum output at about 360 nm and essentially no output below 300 nm (. Table I, General Electric Co.). The temperature was controlled at 22 2 2OC by circulating tap water through flexible plastic tubing wrapped around the reaction chamber. Air was passed through the photolysis solution at 10 q l/ rein for oxygenation and mixing. The exit port was connected to a vapor trap. The trap consisted of a 6 x 3/ 4 in. glass tube containing first XAD 2 resin and then charcoal. The photolyzate was sampled after irradiation intervals of 0, 1, 3, 7, 15 and 30 days. The samples were removed through the reactor drain port and were refrigerated until analyzed.

4. Radiocarbon Recovery The photolyzate samples were assayed for radiocarbon by LSC to determine radiocarbon recovery as a function of irradiation time.

Similar results were obtained for all samples. Results for the 30 and O day samples are presented in Tables II and III, respectively.

5. Investigation for Photoproducts by TLC Autoradiography Aliquots of the 30 and O day photolyzates were reduced in volume loo fold before TLC analysis. First a loo ml aliquot of each sample was ' concentrated to about 5 ml using a rotary vacuum evaporator with with a 4OGO* C water bath, 50 ml of acetonitrile was added and the rotovac'ing continued to just dryness (Acetonitrile was added to expeditiously remove remaining water as an azeotrope and thereby minimize possible lo& s of radiocarbon). The sample solids were dissolved in 3 ml of methanol and c4mx57 4

I. .

quantitatively transferred into a Kuderna Danish concentrator tube with two additional 3 ml washings. Peflux tubes were attached and the concentrator tubes were immersed in a 65 74'C water bath. The tube contents were concentrated: to exactly 1 ml.

A 10.0 t\ l aliquot of each sample concentrate (equivalent to 1.0 ml of the original photolyzate solution) was transferred onto a TLC plate using a 10 pl microsyringe. Each plate was developed two dimensionally, first with ethyl acetate/ methanol/ water (75/ 15/ 10) and then with methyl ethyl ketone/ chloroform/ acetic acid (55/ 30/ 15). The air dried TLC plates were then radioautographed. Figures 2 and 3 are pictures of the 30 and 0 day: radioautographs, respectively.

Various component spots and areas on each TLC plate were quantitated for radiocarbon by carefully scraping the silica gel from the plates and LSC. The results are presented in Tables II and III.

6. Investigation for Photoproducts by Gas Chromatography Perfluorocarboxylic salts as FC 143 are not directly analyzable by gas chromatography but can be analyzed if acidified and methylated with DAM. The 30 and O day photolyzate samples were analyzed by this method (3M Central Research Laboratory). The procedure used is summarized below:

Four ml of photolyzate solution was pipetted into a 4 dram vial and acidified with 0.4 ml of concentrated hydrochloric acid. The resulting samples acids were quantitatively extracted with two 2 ml portions of diethyl ether. The ether extracts were combined in a calibrated lo ml centrifuge tube. One ml of DAM solution was added and the sample allowed. to react for 15 minutes. Excess DAM was then removed by purging the tube contents with a nitrogen jet until the yellow DAM color was almost gone. The sample solution was then diluted to exactly 5 ml with diethyl ether, and analyzed immediately to minimize possible degradation due to any instability of the sample derivative.

The chromatograms for the 30 and O day photolyzate samples are presented in Figure 4. 5 (

* `.

However several less obvious parameters are important: The DAM soultion should be freshly. prepared, preferably the same day it is used. Several injections of sample may be necessary to passivate the column before accurate'and repeatable results are obtained.

RESULTS No photodegradation of FC 143 was detected in this study. Essentially the same analysis results were obtained for the 300day photolyzate sample (no photoproducts formed) as the O day sample,.

The 30 and O day photolyzates had similar radiocarbon assays (Tables II and III) so no significant amount of radiocarbon was volatilized during the photolysis and so the contents of the vapor trap were not analyzed.. Radiocarbon recoveries after sample concentration were good .for the 3b day photolyzate (99%). but l'ess desirable for the O day sample dure to physical loss (86%). A repeat concentration of the O day sample was not done since it is important only as a TLC reference.

Similar TLC radioautographs were obtained indicating no change in composition of the 30 day sample compared to the O day sample (Figures 2 and 3). Quantitative measurement of radiocarbon in various TLC spots and background areas show similar radiocarbon distribution and good'recovery for the 30 day sample (Tables II and III).

Similar gas chromatograms were obtained further confirming the same composition of the 30 and O day samples (Figure 4).

J. W. Todd i 6

.

REFERENCES Crosby, D. G. and Li, M. 1969. Herbicide Photodecomposition, Chapter 12: 321 363 in Degradation of Herbicides, Kearney, P. C. and Kaufman, D. D. Ied), Marcel Dekker Inc. New York, 394 p.

Crosby, D. G. and Tang, C. S., 3. Agric. Food Chem., 17, 1041, (196g)., '

Federal Register, Volume 43. No. 1320Monday, July 10, 1978.

:

General Electric Company, Lamp Division, Cleveland, OH .44112.

Keller, L. R. 1965. Ultraviolet Radiation, 2nd Ed. Wiley, New York.

312 p.

3M Central Research Laboratory, Analytical Request A 70732. .  .

Figure 1  Photoreactor . 7 .

bulb GO3661 T a b l e I  spcctr. rl, Eneqy Dibtribution f o r a G E FGOBL B l a c k Lignt hlb 290  300 380  400 400  500 500  6 0 0 Watts Radiated 0.090 0.235 I .410 )19& O 4miiuR tntenaity < 2.310 Lt Lt about 360 nR I 1.680 2,300 i 0.340 90 r Table II  Radiocarbon recovered in 300Day Photolyzate Solution and TLC Plate Scrapings 'FIGURE 2)

Sample Solution R e l a t i v e % DPM/ ml 17,320 10 Cd TLC Plate Scrapings Area Description DPM( per ml)* % Recovery 1 FC 143 16,643 > 97 2 Origin. 66 0.4 I 3 Vackgrounda 288 1.7 Total 16,997 99.1 * The amount of 14C rad'ibactlvity on the. plate is equivalent to 1 ml of the original photolyzate solutfon. _

Table III  Radiocarbon recovered in O Day Photoyzate Solution and TLC Plate Scrapings `FIGURE 3)

Sample Solution TLC Plate Scrapings DPM/ ml Relative 96 Area Description DPM( per ml)* % Recovery 16,643 10 Cd 1 FC 143 14,493 84.

2 Origin. 43 0.2 3 llBackgroundtV 222 1.3 Total 14,758 85.5 * The amount .of 14C radioactivity on the plate is equivalent to 1 ml of the original photolyzate solution.

 " .  . .

loFigure 2 Photograph of TLC Radioautograph 30 Day FC 143 Photolyzate Reference Sam les 50 fig FC 143 P 4C 3 ot photolyze FC 143 0 2 Origin 0 3 Background (All areas less spots 1 and 2)

DS 1 = Developing Solver, t I'll, 75/ 15/ 10 ethyl acetate/ methanol /water,

DS 2 = Developing Solvent 02, methyl e. thyl ketone/ chloroform/ acetic acid, 55/ 30/ 15 .

I 1

ll .*

Fgiure 3 Photograph of TLC Radioautograph O Day FC 143 Photolyzate DS 2 /

1 I 7 Re 50 17 GL 0 .ference Sample pg FC 143 14C 'C 143 s 0 2 Origin 0 3 Background (All area less spots 1 and 2)

D& l = Developing Solver, t 81, ethyl acetate/ methanol/ water, 75/ 15/ 10 DS 2 = Developing Solvent 62, methyl ethyl ketone/ chloroform/ acetic acid, 55/ 30/ 15 b & s l ’ * . Figure 4  Gas Chromatogram of Derivatized Photolyzate, Samples.,

30 Day Sample O Day Sample 43 0 w 63 cn m I /.

Retention Time in Minutes , Retention Time in Minutes w


[Federal Register Volume 80, Number 244 (Monday, December 21, 2015)]
[Notices]
[Pages 79326-79327]
[FR Doc No: 2015-31969]

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DEPARTMENT OF ENERGY

Federal Energy Regulatory Commission

[Docket No. ER16-500-000]

RE Mustang 4 LLC; Supplemental Notice that Initial Market-Based
Rate Filing Includes Request for Blanket Section 204 Authorization

    This is a supplemental notice in the above-referenced proceeding RE
Mustang 4 LLC's application for market-based rate authority, with an
accompanying rate tariff, noting that such application includes a
request for blanket authorization, under 18 CFR part 34, of future
issuances of securities and assumptions of liability.
    Any person desiring to intervene or to protest should file with the
Federal Energy Regulatory Commission, 888 First Street NE., Washington,
DC 20426, in accordance with Rules 211 and 214 of the Commission's
Rules of Practice and Procedure
    (18 CFR 385.211 and 385.214). Anyone filing a motion to intervene
or protest must serve a copy of that document on the Applicant.

    Notice is hereby given that the deadline for filing protests with
regard to the applicant's request for blanket authorization, under 18
CFR part 34, of future issuances of securities and assumptions of
liability, is January 6, 2016.
    The Commission encourages electronic submission of protests and
interventions in lieu of paper, using the FERC Online links at http://www.ferc.gov. To facilitate electronic service, persons with Internet
access who will eFile a document and/or be listed as a contact for an
intervenor must create and validate an eRegistration account using the
eRegistration link. Select the eFiling link to log on and submit the
intervention or protests.
    Persons unable to file electronically should submit an original and
5 copies of the intervention or protest to the Federal Energy
Regulatory Commission, 888 First Street NE., Washington, DC 20426.
    The filings in the above-referenced proceeding are accessible in
the Commission's eLibrary system by clicking on the appropriate link in
the above list. They are also available for electronic review in the
Commission's Public Reference Room in Washington, DC. There is an
eSubscription link on the Web site that enables subscribers to receive
email notification when a document is added to a subscribed docket(s).
For assistance with any FERC Online service, please email
<EMAIL_ADDRESS>or call<PHONE_NUMBER> (toll free). For
TTY, call<PHONE_NUMBER>.

    Dated: December 14, 2015.
Nathaniel J. Davis, Sr.,
Deputy Secretary.
[FR Doc. 2015-31969 Filed 12-18-15; 8:45 am]
BILLING CODE 6717-01-P


[Federal Register Volume 88, Number 222 (Monday, November 20, 2023)]
[Notices]
[Pages 80715-80717]
[FR Doc No: 2023-25602]

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ENVIRONMENTAL PROTECTION AGENCY

[EPA-HQ-OPP-2023-0015; FRL-11534-01-OCSPP]

Pesticide Emergency Exemptions; Agency Decisions and State and
Federal Agency Crisis Declarations

AGENCY: Environmental Protection Agency (EPA).

ACTION: Notice.

-----------------------------------------------------------------------

SUMMARY: EPA has granted emergency exemptions under the Federal
Insecticide, Fungicide, and Rodenticide Act (FIFRA) for use of
pesticides as listed in this notice. The exemptions were granted during
the period July 1, 2023, to September 30, 2023, to control unforeseen
pest outbreaks.

FOR FURTHER INFORMATION CONTACT: Charles Smith, Director, Registration
Division (7505T), Office of Pesticide Programs, Environmental
Protection Agency, 1200 Pennsylvania Ave. NW, Washington, DC 20460-
0001; main telephone number:<PHONE_NUMBER>; email address:
[email protected].

SUPPLEMENTARY INFORMATION:

I. General Information

A. Does this action apply to me?

    You may be potentially affected by this action if you are an
agricultural

producer, food manufacturer, or pesticide manufacturer. The following
list of North American Industrial Classification System (NAICS) codes
is not intended to be exhaustive, but rather provides a guide to help
readers determine whether this document applies to them. Potentially
affected entities may include:
 Crop production (NAICS code 111).
 Animal production (NAICS code 112).
 Food manufacturing (NAICS code 311).
 Pesticide manufacturing (NAICS code 32532).
    If you have any questions regarding the applicability of this
action to a particular entity, consult the person listed after FOR
FURTHER INFORMATION CONTACT.

B. How can I get copies of this document and other related information?

    The docket for this action, identified by docket identification
(ID) number EPA-HQ-OPP-2023-0015, is available at https://www.regulations.gov or at the Office of Pesticide Programs Regulatory
Public Docket (OPP Docket) in the Environmental Protection Agency
Docket Center (EPA/DC), West William Jefferson Clinton Bldg., Rm. 3334,
1301 Constitution Ave. NW, Washington, DC 20460-0001. The Public
Reading Room is open from 8:30 a.m. to 4:30 p.m., Monday through
Friday, excluding legal holidays. The telephone number for the Public
Reading Room and the OPP docket is<PHONE_NUMBER>. Please review the
visitor instructions and additional information about the docket
available at https://www.epa.gov/dockets.

II. Background

    EPA has granted emergency exemptions to the following State and
Federal agencies. The emergency exemptions may take the following form:
Crisis, public health, quarantine, or specific.
    Under FIFRA section 18 (7 U.S.C. 136p), EPA can authorize the use
of a pesticide when emergency conditions exist. Authorizations
(commonly called emergency exemptions) are granted to State and Federal
agencies and are of four types:
    1. A ``specific exemption'' authorizes use of a pesticide against
specific pests on a limited acreage in a particular State. Most
emergency exemptions are specific exemptions.
    2. ``Quarantine'' and ``public health'' exemptions are emergency
exemptions issued for quarantine or public health purposes. These are
rarely requested.
    3. A ``crisis exemption'' is initiated by a State or Federal agency
(and is confirmed by EPA) when there is insufficient time to request
and obtain EPA permission for use of a pesticide in an emergency.
    EPA may deny an emergency exemption: If the State or Federal agency
cannot demonstrate that an emergency exists, if the use poses
unacceptable risks to the environment, or if EPA cannot reach a
conclusion that the proposed pesticide use is likely to result in ``a
reasonable certainty of no harm'' to human health, including exposure
of residues of the pesticide to infants and children.
    If the emergency use of the pesticide on a food or feed commodity
would result in pesticide chemical residues, EPA establishes a time-
limited tolerance meeting the ``reasonable certainty of no harm
standard'' of the Federal Food, Drug, and Cosmetic Act (FFDCA).
    In this document: EPA identifies the State or Federal agency
granted the exemption, the type of exemption, the pesticide authorized
and the pests, the crop or use for which authorized, number of acres
(if applicable), and the duration of the exemption. EPA also gives the
Federal Register citation for the time-limited tolerance, if any.

III. Emergency Exemptions

A. U.S. States and Territories

Arkansas
Department of Agriculture
    Specific exemption: EPA authorized the use of thiamethoxam on a
maximum of 450,000 acres of rice to control rice stink bug. Time-
limited tolerances in connection with a previous action support this
emergency use and are established in 40 CFR 180.565(b). The
authorization was effective July 14, 2023 to October 15, 2023.
California
Department of Pesticide Regulation
    Crisis exemption: EPA concurred upon a crisis exemption declared by
the California Department of Pesticide Regulation for the use of
afidopyropen to control lygus and whitefly in cotton on August 4, 2023.
The use season expired on October 31, 2023, and a subsequent specific
exemption was also submitted.
Hawaii
Department of Agriculture
    Crisis exemption: EPA concurred upon a crisis exemption declared by
the Hawaii Department of Agriculture for the use of cypermethrin
applied via unmanned aerial vehicles to control Coconut Rhinoceros
Beetles in ornamental palm trees on August 16, 2023, and a subsequent
quarantine exemption was also submitted.
Louisiana
Department of Agriculture and Forestry
    Specific exemption: EPA authorized the use of triclopyr on a
maximum of 450,000 acres of sugarcane to control divine nightshade. A
time-limited tolerance in connection with this action has been
established in 40 CFR 180.417(b). The specific exemption was authorized
on September 20, 2023, and effective October 1, 2023 to May 31, 2024.
Mississippi
Department of Agriculture and Commerce
    Specific exemption: EPA authorized the use of thiamethoxam on a
maximum of 60,000 acres of rice to control rice stink bug. Time-limited
tolerances in connection with a previous action support this emergency
use and are established in 40 CFR 180.565(b). The authorization was
effective July 14, 2023 to October 15, 2023.
Missouri
Department of Agriculture
    Specific exemption: EPA authorized the use of thiamethoxam on a
maximum of 60,000 acres of rice to control rice stink bug. Time-limited
tolerances in connection with a previous action support this emergency
use and are established in 40 CFR 180.565(b). The authorization was
effective July 14, 2023 to October 15, 2023.
South Dakota
Department of Agriculture and Natural Resources
    Crisis exemption: EPA concurred upon a crisis exemption declared by
the South Dakota Department of Agriculture and Natural Resources for
the use of malathion to control red sunflower seed weevil in sunflower
on August 16, 2023. The 15-day crisis exemption program expired on
August 31, 2023.

B. Federal Departments and Agencies

National Aeronautics and Space Administration
    Specific exemption: EPA authorized the use of ortho-phthaldehyde,
incorporated into a porous resin, to treat and protect the
International Space Station (ISS) internal active thermal control
system (IATCS) coolant fluid from growth of aerobic and microaerophilic
water bacteria and unidentified gram-negative rods. This request was
granted because, without this use, the ISS would have no means

to control organisms in the IATCS since there are no registered
alternatives available that meet the required criteria. This emergency
request proposed a use of a new (unregistered) chemical and in
accordance with the requirements at 40 CFR 166.24(a)(1), a notice of
receipt published in the Federal Register on August 25, 2023, to allow
a public comment period that closed on September 11, 2023. The specific
exemption was authorized on September 29, 2023, and effective October
7, 2023 to October 7, 2024.

C. Annual Report of Crisis Exemptions Declared and Revoked

    Three crisis exemptions were declared, and zero crisis exemptions
were revoked between October 1, 2022, and September 30, 2023.
    Authority: 7 U.S.C. 136 et seq.

    Dated: November 13, 2023.
Charles Smith,
Director, Registration Division, Office of Pesticide Programs.
[FR Doc. 2023-25602 Filed 11-17-23; 8:45 am]
BILLING CODE 6560-50-P