Pa Meyi 3, 2023, EPA idasindikiza lamulo lomwe lidaperekedwa mu Federal Register loletsa kugwiritsa ntchito kwambiri methylene chloride.
Chivomerezo cha EPA cha lamulo lomwe likuperekedwali chaperekedwa motsatira Toxic Substances Control Act (TSCA), ndipo dichloromethane ndi mankhwala achiwiri omwe chiopsezo chake chimayendetsedwa motsatira njira yokonzanso yomwe idapangidwa ndi Frank R. Lautenberg. Lamulo la Chitetezo cha Mankhwala la Zaka za m'ma 2016, pambuyo poti bungweli latsatira njira yotetezera anthu ku asbestos, lidayambitsidwa chaka chatha.
Dichloromethane imagwiritsidwa ntchito m'njira zosiyanasiyana, kuphatikizapo kugwiritsa ntchito kwa ogula monga zotsukira mafuta ndi zotsukira maburashi pa utoto ndi zokutira, kugwiritsa ntchito kwamalonda monga zomatira ndi zotsekera, ndi kugwiritsa ntchito kwa mafakitale popanga mankhwala ena. Mwachitsanzo, dichloromethane imagwiritsidwa ntchito ngati mankhwala pakati pa kupanga ma hydrofluorocarbons (HFCs)32, omwe amagwiritsidwa ntchito mu mafiriji osakanikirana kuti alowe m'malo mwa zinthu zomwe zili ndi mphamvu yayikulu yotenthetsera dziko lapansi.
Anthu osachepera 85 afa chifukwa cha methylene chloride kuyambira mu 1980, makamaka ogwira ntchito yokonza nyumba omwe adaphunzitsidwa bwino komanso kukhala ndi zida zodzitetezera, malinga ndi bungwe la Environmental Protection Agency.
Kuwunika kosatsimikizika kwa chiopsezo cha dichloromethane komwe bungweli lidachita chifukwa cha zoopsa zomwe zimagwirizanitsidwa ndi ogwira ntchito, akatswiri osagwiritsa ntchito (antchito omwe ali pafupi koma osakhudzidwa mwachindunji ndi mankhwalawo), ogula, ndi omwe ali pafupi ndi malo omwe ogula amagwiritsa ntchito. Bungwe la Environmental Protection Agency lapeza zoopsa zomwe zingachitike pa thanzi la anthu, kuphatikizapo poizoni wa mitsempha, zotsatira za chiwindi ndi khansa chifukwa chopuma, komanso kupezeka pakhungu ndi methylene chloride.
Malamulo oyendetsera zoopsa omwe akuperekedwawa achepetsa mofulumira kupanga, kukonza ndi kufalitsa methylene chloride pazinthu zonse zomwe ogula amagwiritsa ntchito komanso ntchito zambiri zamafakitale ndi zamalonda, zomwe zambiri zidzagwiritsidwa ntchito mokwanira mkati mwa miyezi 15. Pa ntchito zambiri za methylene chloride zomwe EPA ikufuna kuti ziletse, kusanthula kwake kunawonetsa kuti njira zina zotsika mtengo komanso zogwira mtima m'malo mwa zinthu za methylene chloride zimapezeka nthawi zambiri.
"Sayansi ya methylene chloride ndi yomveka bwino ndipo kukhudzana ndi methylene chloride kungayambitse mavuto aakulu pa thanzi komanso imfa, zomwe ndi zoona kwa mabanja ambiri omwe ataya okondedwa awo chifukwa cha poizoni woopsa," adatero Michael S. Regan, Mtsogoleri wa EPA, mu lipoti la atolankhani la bungweli. "Ndicho chifukwa chake EPA ikuchitapo kanthu popereka lingaliro loteteza thanzi la ogwira ntchito poyambitsa njira zowongolera zovuta pantchito zomwe zingaletse kugwiritsa ntchito mankhwala ambiriwa ndikuchepetsa kukhudzana ndi ena onse. Lumikizanani. Kuletsa kumeneku komwe kwaperekedwa kale kukuwonetsa kupita patsogolo kwakukulu komwe tapanga pakukhazikitsa njira zatsopano zotetezera chitetezo cha mankhwala komanso kugwiritsa ntchito njira zomwe zachedwa kale kuti titeteze bwino thanzi la anthu."
“Pa mafakitale opanga, kukonza mafakitale, ndi kugwiritsa ntchito boma komwe EPA sinanene kuti kuletse, EPA ikupereka pulogalamu yoteteza mankhwala kuntchito yokhala ndi malire okhwima kuti iteteze antchito bwino,” inatero m'mawu ake. “EPA yalandira malingaliro amakampani omwe akusonyeza kuti malo ena akhoza kutsatira kale malire okhwima omwe akuperekedwa kuti awonetsedwe ndi methylene chloride. Zofunikira izi zimalola kupitiliza kukonza methylene chloride kuti ipange mankhwala omwe ndi ofunikira kwambiri pochepetsa zoyesayesa zokhudzana ndi kusintha kwa nyengo zomwe zafotokozedwa mu US Innovation and Manufacturing Report. Kuchitapo kanthu ndikofunikira. Mafiriji ndi mankhwala ena omwe sawononga nyengo amachita gawo lofunikira polimbana ndi kusintha kwa nyengo, ndipo lamulo lomwe likuperekedwa ndi EPA limathandizira zoyesayesa zomwe zikupitilira kuchepetsa utsi.”
Kuphatikiza apo, EPA ikusonyeza kuti kugwiritsa ntchito dichloromethane komwe NASA, DOD ndi FAA zimafunikira kupitilizabe kulamulidwa bwino kuntchito, chifukwa kuwonekera kungachepe mokwanira m'mikhalidwe yovuta kwambiri iyi kuti kuchepetse chiopsezo kwa ogwira ntchito momwe angathere.
"Ziletso ndi zoletsa zomwe zikuperekedwazi zidzatetezanso anthu kuti asakumane ndi methylene chloride," adatero chikalatacho. "Bungwe Loona za Chitetezo cha Zachilengedwe, pogwiritsa ntchito zaka zisanu ndi chimodzi za deta yokhudzana ndi poizoni, lapeza malo ochepa ngati chiopsezo ku madera okhala ndi mipanda. Kuletsa kumeneku mu lamulo la EPA kudzakhudza kupitiliza kugwiritsa ntchito methylene chloride m'malo ambiri mwa malowa, zomwe kwenikweni ndi chiopsezo kwa anthu ammudzi."
Ndemanga pa lamulo lomwe likuperekedwali zidzalandiridwa kudzera mu Federal Electronic Rulemaking Portal mpaka pa Julayi 3, 2023, nambala yolowera EPA-HQ-OPPT-2020-0465.
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