University of Wisconsin-Madison tus kws tshawb fawb Christy Remucal pom tias Lake Michigan cov dej hauv dej thiab lawv cov av xau tuaj yeem yog qhov chaw ntawm PFAS, uas tuaj yeem khaws thiab nyob hauv tib neeg lub cev mus ntev. Kev raug PFAS tuaj yeem ua rau mob qog noj ntshav thiab lwm yam teeb meem kev noj qab haus huv. (Courtesy ntawm University of Wisconsin-Madison)
Sijhawm Nyeem Ntawv: 3 feeb

Wisconsin Saib yog lub koom haum tsis muaj txiaj ntsig thiab tsis koom nrog xov xwm. Subscribe rau peb nawb tsab ntawv xov xwm kom tau txais peb cov dab neeg tshawb nrhiav thiab xov xwm hnub Friday sib sau ua ke. Zaj dab neeg no tau luam tawm hauv kev koom tes nrog Lub Koom Haum Xov Xwm.

Ib tug loj plume ntawm cov tshuaj lom neeg tsim los ntawm ib tsob nroj uas tsim hluav taws kub ua npuas ncauj tau pom los ntawm cov dej hauv av mus rau Lake Michigan's Green Bay, cov kws tshawb fawb tau hais rau hnub Tuesday.

Cov tshuaj muaj nyob rau hauv ib tsev neeg ntawm cov tshuaj hu ua PFAS, los yog per- thiab polyfluoroalkyl tshuaj, uas yog siv dav hauv cov neeg siv khoom xws li cov khoom siv hluav taws xob thiab cov khoom siv dej-repellent rau cov ntaub pua plag-tiv taus. Lawv kuj yog ib qho tseem ceeb muaj nyob rau hauv hluav taws-extinguishing foams. Lawv tuaj yeem sib sau thiab pheej nyob hauv tib neeg lub cev rau lub sijhawm ntev, thiab Kev kis kab mob tuaj yeem ua rau mob qog noj ntshav thiab lwm yam teeb meem kev noj qab haus huv.

Cov dej hauv av thiab cov kwj deg ze ntawm Tyco Cov Khoom Hluav Taws Xob hauv Marinette, Wisconsin, muaj cov npuas dej los ntawm cov nroj tsuag qhov chaw sim.

Cov kws tshawb fawb hauv University of Wisconsin tau taug qab kev txav ntawm cov tshuaj hauv cov dej hauv av thiab cov kwj deg ze. Hauv tsab ntawv tshaj tawm lub lim tiam dhau los, lawv tau hais tias lub plume tau ua rau nws txoj hauv kev mus rau Green Bay, uas txuas ntxiv 120 mais (193 mais) raws sab qaum teb Wisconsin thiab sab qab teb ntug dej hiav txwv ntawm Michigan lub Upper Peninsula.

Cov qauv dej qhia tias lub plume yog kwv yees li 2.49 mais (4 km) dav tab sis nws tsis paub tias nws txuas mus ntev npaum li cas ntawm lub bay, hais tias Christy Remucal, tus kws tshaj lij ntawm pej xeem thiab ib puag ncig engineering.

Remucal tau hais hauv kev xam phaj hnub Tuesday tias "Ntau PFAS los ntawm qhov chaw yuav nkag mus rau hauv Lake Michigan thiab nws yuav nyuaj rau muaj," Remucal tau hais hauv kev xam phaj hnub Tuesday. "Nws yog qhov sib cais tiag tiag, nyuaj rau kev ntes thiab kho."

Cov kws tshawb fawb tau tshawb pom 17 yam tshuaj PFAS sib txawv hauv lub bay, ib qho loj tshaj plaws nyob rau hauv Great Lakes. Ntau txhiab tus PFAS sib txawv tau tsim txij li xyoo 1940s.

Cov qauv dej coj mus rau ntawm ntug dej hiav txwv hauv thaj chaw Marinette pom PFAS qhov ntau ntawm 250 qhov chaw hauv ib trillion - ntau dua li qib pom hauv kev tshawb fawb yav dhau los ntawm cov dej ntws mus rau hauv hiav txwv, Remucal tau hais.

Lawv kuj tseem nyob deb tshaj li 70 feem ntawm ib trillion uas US Environmental Protection Agency tau tsim los ua ib qho kev pheej hmoo ntawm kev haus dej haus cawv rau ob qho tib si PFAS tebchaw, hu ua PFOS thiab PFOA. Lub koom haum lub Rau Hli dhau los tau tshaj tawm cov lus qhia tshiab teeb tsa qhov tshwm sim ze rau xoom, hais tias cov tshuaj muaj kev phom sij txawm tias nyob rau theem tsis paub meej.

Remucal thiab cov npoj yaig Sarah Balgooyen siv cov txheej txheem tshuaj ntiv tes txhawm rau taug qab Green Bay PFAS mus rau Tyco qhov chaw.

Wisconsin tus kws lij choj dav dav xyoo tas los tau foob Tyco thiab Johnson Controls, nrog rau qhov nws tau koom ua ke hauv 2016, dhau PFAS kev sib kis hauv thaj chaw Marinette.

Tyco tau hais nyob rau hauv tsab ntawv tshaj tawm hnub Tuesday nws zoo siab txais tos rau Green Bay txoj kev kawm, uas tau txais nyiaj los ntawm Wisconsin Sea Grant College Program, thiab nws tau nqis peev "ntau lab daus las" los hais txog Marinette cov pa phem. Cov kev siv zog no suav nrog kev kho dej hauv av "nthuav dav", kev khawb av thiab ua haujlwm kom xa "cov dej haus mus ntev" hauv thaj chaw.

PFAS tebchaw tau pom nyob rau hauv tag nrho tsib lub Great Lakes - Erie, Huron, Michigan, Ontario thiab Superior. Lawv tsis degrade ib puag ncig hauv ib puag ncig thiab txav mus los hauv dej, tsis zoo li cov kab mob sib kis xws li PCBs uas lo rau hauv cov xuab zeb, Remucal tau hais.

Dan Jones, tus thawj coj ntawm Michigan State University's Center rau PFAS Kev Tshawb Fawb, tau hais tias qhov kev tshawb pom tseem ceeb vim tias lawv nyob ntawm ntau yam sib txuas ntau dua li feem ntau PFAS cov haujlwm.

Jones tau hais tias, "Peb tsis tau ntsuas txhua yam ntau npaum li cov pab pawg no," ntxiv tias txoj kev tshawb fawb tsis zoo hauv kev taug qab cov pa phem los ntawm nws qhov chaw los ntawm cov kwj dej, dej hauv av thiab Green Bay.

Ntau yam tseem tsis tau paub txog yuav ua li cas cov tshuaj PFAS cuam tshuam rau Great Lakes ntses, lub ntsiab lus ntawm Michigan State chaw yog tshawb nrhiav, Jones tau hais.

Nws tau hais tias "Peb paub tias cov khoom sib txuas no tau txais los ntawm cov khoom nyob hauv pas dej ... suav nrog cov ntses tshwj xeeb uas peb tib neeg noj," nws hais. "Tab sis peb tsis paub ntau npaum li peb xav txog cov ntses twg lawv khaws cia hauv thiab yog vim li cas, thiab seb nws txawv rau cov tebchaw sib txawv."

Nrov dab neeg los ntawm Wisconsin Watch