Inyang Mayu 3, 2023, ing EPA pepalwal ne ing metung a mumutus a Section 6(a) Toxic Substances Control Act (TSCA) risk management rule a mag-impose kareng pamagbawal king pamaglalang, pamag-import, pamagprosesu, pamikalat, at pamangamit king dichloromethane. ginamit yang solvent kareng miyayaliwang consumer ampo commercial a aplikasyun. Iti ing mumunang mumutus ning EPA a tuntunan king pamaniakup king panganib manibat inyang pepalwal ne ing metung a pamagbayu king kabaldugan ning panganib kanitang milabas a banua base king bayung “all-chemical approach” at patakaran a mangailangan kareng magobra na e la magsuot personal protective equipment (PPE). . Iti mu rin ing magpakit king maragul a pamaglawak da reng regulatory prohibitions a magagamit kareng kemikal a makayagpang na kareng TSCA risk management restrictions, agyang deng restrictions a reni mas restrictive la lalam ning minunang EPA risk management action framework.
Ing EPA magpropose yang ibawal ing komersyal a pamaglalang, pamagprosesu ampo pamikalat ning dichloromethane para keng domestic use; bawal ing keraklan kareng industrial ampo commercial a pamangamit ning dichloromethane; kailangan na ing metung a use-specific chemical workplace protection plan (WCPP) manatili yang epektibo at mamye yang mapilan a time-limited critical use exemptions agpang keng TSCA Section 6(g) para keng methylene chloride use na malyaring maging sangkan ning maragul a pangasira keng seguridad ning bangsa ampo kritikal a imprastraktura. Deng stakeholders atin lang anggang July 3, 2023 para magkomentu keng mumutus a patakaran.
King pamagpropose kareng risk management measures para keng dichloromethane, ikit ning EPA na ing paulit-ulit a pamangamit keng substance keng consumer, commercial, ampo industrial a aplikasyun mangailangan yang regulatory action, mumuna ing pamagbawal, antimo ing mayayakit keng Table 3 ning mumutus a tuntunan. Dakal kareng kundisyun ning pamangamit kayabe la, pero ali limitadu, ing industrial ampo komersyal a pamangamit ning methylene chloride para keng pamaglinis kareng solvents, pintura ampo coatings (at washes), steam degreasing, adhesives, sealants, sealants, textiles ampo tela, ampo kareng produktung pang-saken. , lubricants ampo lubricants, pipe insulation, oil ampo gas drilling, laruan, gamit keng pamaglarin ampo sports, ampo plastic ampo goma. Ing EPA metung ya kareng mekapagdesisyun na kailangan lang i-ban deng eganaganang assessed consumer uses ning dichloromethane.
Ing EPA sasabyan na ing requirements ning proposal babawal na ing pamangamit na mag-account keng metung a katlu ning kabilugan a banua-banuang produksyun (TSCA ampo non-TSCA a pamangamit) ning methylene chloride a megawa, "maglakwan yang sapat a circulating stocks para mamye ing panibatan a mumuntalan ning EPA." patuloy a pamangamit Deting kritikal o mumunang pamangamit kapamilatan ning Critical Use Exemption o WCPP.
Nung akit na ning EPA na ing metung a sangkap atin yang e makatuliran a panganib king kalusugan ning tau o king kapaligiran king kayang pamagsuri king panganib, kailangan yang magpropose kareng requirements king pamaniakup king panganib angga king kailangan ban ing sangkap ala nang makanyan a panganib. Potang mag impose yang pamagbawal keng pamaniakup keng panganib keng metung a kemikal, ing EPA dapat yang magkonsidera kareng implikasyon ning patakaran keng ekonomiya, kayabe nala reng gastus ampo benepisyu, cost-effectiveness, ampo ing epekto ning patakaran keng ekonomiya, malating negosyu, ampo pamagbayu keng teknolohiya. nung dapat yang ibawal ing substansya. Atin pang alternatibung teknikal ampo ekonomikal a viable.
Ing EPA magpropose yang makatuking pamagbawal keng pamangamit methylene chloride ampo ing karelang epektibung petsa:
Ing EPA pepakilala nala naman deng notification ampo record keeping requirements para kareng kumpanya na magsupply methylene chloride kareng customer.
Ing pamangamit king dichloromethane para ilako ing pintura ampo ing coatings para keng pamangamit da reng mamisali ali ya kayabe kening ban, uling ing pamangamit ayni sasakupan ne ning kasalukuyan a EPA risk management rule a mipalabas kanitang 2019, a maka-codify keng 40 CFR § 751.101.
Ing section 6(g) ning TSCA paintulutan ne ing EPA na mag exempt kareng alternatibung requirements ning risk management rule para kareng kritikal o essential a gamit na akakit ning EPA. paintulutan nala naman deng waiver nung ing EPA abalu na ing pamamintu keng requirement ayni magdalang maragul a pangasira keng pambansang ekonomiya, pambansang seguridad, o kritikal a imprastraktura. Ing US Environmental Protection Agency magrekomenda yang critical use exemption para keng methylene chloride kareng makatuking kasu:
Ing EPA's mumutus a WCPP para keng permitted a pamangamit ning dichloromethane kayabe nala reng komprehensibung requirements para protektan la reng magobra ibat keng exposure, kayabe na ing respiratory protection, pamangamit PPE, exposure monitoring, training, ampo regulated areas. Dapat papansinan na ing EPA migmungkahi yang metung a existing chemical exposure limit (ECEL) para keng airborne methylene chloride concentrations maygit 2 parts per million (ppm) base keng 8-hour time-weighted average (TWA), na mas mababa kesa keng OSHA's current Permissible Exposure Limit ( PEL) para keng dichlor ppm 2 ppm. Ing mumutus a action level maging yang kapitna ning ECEL value, na mag trigger kareng karagdagang monitoring activities para siguraduan na deng magobra ali la mipalabas kareng concentrations a maygit keng ECEL. Ing EPA magrekomenda ya namang magset kang short-term exposure limit (EPA STEL) a 16 ppm kilub ning 15-minutung sampling period.
Imbes na ing pamagbawal, ing EPA magmungkahi yang requirements para protektan la reng magobra lalam da reng makatuking kundisyun ning pamangamit:
Pamagprosesu: Bilang metung a reagent. Tandanan mu na ing EPA paintulutan neng isundu ing pamangamit ayni lalam ning WCPP uling isipan na na ing maragul a dagul ning dichloromethane mi-recycle ya para kareng pamangamit a reni, halus ngan kareti magagamit la para gawan ing HFC-32. Ing HFC-32 metung ya kareng kontroladung sangkap lalam ning American Innovation and Manufacturing Act (AIM Act) ning 2020. Ing EPA asahan na king kapamilatan ning pamag-authorize king HFC-32, ing rulemaking ayni e ya maka-abala kareng upaya para mibaba ing global warming potential chemicals.
Industrial o commercial a gamit para keng pamaglako pintura ampo coatings ibat keng safety-critical, corrosion-sensitive a eroplanu ampo spacecraft components a bandi o gagawan ning US Department of Defense, NASA, Homeland Security, ampo ing Federal Aviation Administration, metung a ahensya, o metung a ahensya a gagawang kontraktor kareng lugal, a kontroladu ning metung a ahensya o ahensya a kontraktor
Industrial o commercial a gamitan bilang adhesive para keng acrylic ampo polycarbonate kareng mission-critical a military ampo space vehicles, kayabe na ing pamaglalang kareng specialty a baterya o agency contractors.
Deng stakeholders na gagawang, magprosesu, mamye, o gagamit methylene chloride para keng nanu mang EPA-assessed a kapaligiran ning pamangamit malyari lang maging interesadu keng pamagkomentu kareng dakal a aspetu na niting mipanukalang precedent-setting rule. Deng interesadu malyari lang mag-ambag keng EPA kareng makatuking bage:
Pamag-assess king Risk Management Approach kareng Kondisyun ning Pamangamit: Deng stakeholders malyari lang mag-evaluate nung ing mipanukalang risk management requirements para kareng balang kundisyun ning pamangamit makayagpang ya keng methylene chloride risk assessment ning EPA para kareng balang kundisyun ning pamangamit ampo ing EPA. TM Statutory powers lalam ning Section 6 ning TSCA. Alimbawa, nung akit ning EPA na ing balat exposure keng methylene chloride keng lalam ning mapilan a kundisyun ning pamangamit magdalang e makatuliran a panganib, at nung ing EPA mangailangan yang mas marakal pa kesa keng proteksyun ning balat para mabawas ing panganib, deng stakeholders malyari dang i-evaluate ing panga-ayus da reng karagdagang requirements. .
Gastus: Ing EPA linawe ne ing incremental non-closure costs a makasuglung kening mipanukalang tuntunan a $13.2 million kilub ning 20 banua king 3% a diskwentu at $14.5 million kilub ning 20 banua king diskwentu a 7%. Deng stakeholders malyari dang i-evaluate nung deng projected costs a reni sasakupan da la ngan deng aspetu ning pamagpatupad keng mumutus a patakaran, kayabe na ing gastus ning pamag-re-enact (pamagbawal keng pamangamit) o ​​pamamintu kareng kundisyun ning WCPP para paintulutan ing patuloy a pamangamit, kayabe na ing pamamintu keng ECEL 2 ppm.
WCPP Requirements: Para kareng kundisyun ning pamangamit a mumuntalan ning EPA na i-ban, deng stakeholders malyari lang mag-assess nung atin lang data a susuporta keng WCPP compliance na sapat a maka-mitigate keng exposure kesa keng pamag-ban (lalu na para kareng kundisyun ning pamangamit nung nukarin ing EPA magpropose ya keng WCPP bilang mumunang alternatibung, a mipanukala keng mumutus a tuntunan a alternatibung pamagbawal keng metung a stakeholders malyari ya namang mag-evaluate kareng stakeholders feasibility da reng WCPP requirements ampo isipan ing pamamintu keng OSHA standard para keng methylene chloride.
Timeline: Deng stakeholders malyari lang magkonsidera nung ing mumutus a ban schedule malyari ya at deng aliwang gamit malyari lang ikonsidera para keng time-limited critical-use exemption agpang kareng statutory criteria para keng critical-use exemption.
Alternatibo: Deng stakeholders malyari lang magkomentu keng pamagsuri ning EPA kareng alternatibung methylene chloride at lawan nung atin pang abot-kayang, mas ligtas a alternatibung pamagbayu keng mumutus a bawal a pamangamit lalam ning patakaran.
Minimum Levels: Ing EPA partikular yang mekisabing komentu keng bilang da reng pasilidad na malyaring mabigu ampo reng gastus, ampo babawal na ing pamangamit ning dichloromethane lalam da reng mapilan a kundisyun ning industrial ampo commercial a pamangamit a makasulat keng mumutus a tuntunan. Ing EPA buri na namang magkomentu nung ing minimum a lebel ning methylene chloride (alimbawa 0.1% o 0.5%) kareng mapilan a formula para keng sustainable a industrial ampo commercial a pamangamit dapat yang ikonsidera potang mayari ing pamagbawal, at nung makanyan, nanu la reng lebel a dapat ituring a bare minimum.
Certification and Training: King kayang proposal, ing EPA pepaliwanag na na tinggap na rin ing lakbang ning sertipikasyun ampo reng restricted access programs a magbawal keng pamangamit methylene chloride kareng me-train ampo lisensyadung gagamit para siguraduan na deng mapilan mung magobra keng planta malyari lang sali at gumamit dichloromethane. Deng stakeholders malyari lang magkomentu nung ing certification ampo training programs malyari lang maging epektibo keng pamagbawas keng worker exposure bilang metung a paralan ning pamaniakup keng panganib lalam da reng mapilan a kundisyun ning pamangamit, kayabe nala reng kundisyun ning pamangamit a mumuntalan ning EPA na ibawal.
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