Los ntawm Pat Txwj Laus, Lub Kaum Hli 10, 2020
Cov ntawv xeem ntsuas tau tso tawm lub limtiam no los ntawm St. Mary Lub Chaw Ua Si Dej Thaj Tsam thiab Maryland Lub Chaw Haujlwm Ib Puag Ncig (MDE) qhia tias muaj PFAS muaj cov kuab lom ntau hauv cov dej muaj kwj thiab cov dej uas cuam tshuam nrog kev siv tshuaj ntawm lub Webster Outlying Field ntawm Patuxent River. Naval Cua Chaw Nres Tsheb (Webster Field) hauv St. Inigoes, Maryland. Lub hauv paus nyob ze rau yav qab teb ntawm St. Mary Lub Nroog, MD.
Cov txiaj ntsig tau qhia tias muaj yoov nyob hauv tus dej los ntawm lub tsev teev ntuj Point thiab nyob rau hauv St. Oysters tau tshawb xyuas los ntawm Eurofins, tus thawj coj hauv ntiaj teb hauv kev kuaj PFAS. Qhov tsom xam tau ua sawv cev ntawm Niam Mab Liab lub Hav Zoov Dej Dej Kev Ua Si thiab tau txais kev txhawb nqa nyiaj txiag los ntawm Cov Neeg Ua Haujlwm Rau Pej Xeem Kev Ua Kom Zoo Ib Puag Ncig, PEI.
Meanwhile, cov ntaub ntawv tso tawm los ntawm MDE pom theem ntawm PFAS ntawm 13.45 ng / l (nanograms ntawm ib liter, lossis seem ntawm ib trillion) tau pom hauv cov dej hauv dej ze li 2,300 ko taw sab hnub poob ntawm Webster Field. Raws li cov kev tshawb pom no, MDE cov ntawv tshaj tawm, "PFAS kev soj ntsuam kev noj qab haus huv kev noj qab haus huv rau kev ua si cov dej saum npoo av thiab nqhuab noj tau tsawg heev." Kev soj ntsuam ntawm cov dej tsis huv los ntawm PFAS nyob rau ntawm cov qib zoo sib xws hauv lwm lub xeev, txawm li cas los xij, qhia tau hais tias lub neej tsiaj muaj lub neej muaj cov co toxins ntau, vim yog lub cev lom neeg ntawm cov tshuaj lom neeg lub cev.
Niam mab txiv ntoo hauv Maryland muaj 1,100 ppt ntawm 6: 2 Fluorotelomer sulfonic acid, (FTSA) thaum bivalves hauv St. Inigoes Creek tau txuam nrog 800 ppt ntawm Perfluorobutanoic acid, (PFBA) thiab 220 ppt ntawm Perfluoropentanoic acid, (PFPEA).
Cov thawj coj saib xyuas kev noj qab haus huv hauv tebchaws tau ceeb toom peb kom tsis txhob haus ntau dua 1 ppt ntawm cov co toxins ib hnub hauv cov dej haus. Cov tshuaj PFAS sib txuas nrog cov neeg mob qog nqaij hlav, mob plab me nyuam, thiab cov kab mob thaum yau, nrog rau mob vwm, mob hawb pob, thiab saib xyuas kev tsis txaus siab. Cov tib neeg yuav tsum tsis txhob noj cov zaub mov no, tshwj xeeb tshaj yog cov poj niam uas tej zaum cev xeeb tub.
Nyob rau hauv Maryland, lub luag haujlwm rau kev tswj hwm kev noj qab haus huv ntawm cov qwj roj yog sib cais ntawm peb lub xeev cov koomhaum: Maryland Lub Chaw Haujlwm Ib Puag Ncig (MDE), Chav Haujlwm Saib Xyuas Ib Pwm Ncig (DNR), thiab Lub Chaw Haujlwm Saib Xyuas Kev Noj Qab Haus Huv thiab Mental (DHMH). Cov chaw haujlwm no tau ua tsis tiav los tiv thaiv pej xeem kev noj qab haus huv thaum Trump cov thawj coj EPA tau ua raws cov qauv hais txog kev paug PFAS. Thaum cov xeev tau foob Lub Tsev Haujlwm Saib Xyuas Kev Tiv Thaiv vim yog khoom noj khoom haus thiab dej, DOD tau teb los ntawm kev thov "kev tiv thaiv kev tiv thaiv" txhais tau tias lawv muaj cai ua kom dej qias neeg vim muaj kev cuam tshuam kev nyab xeeb hauv tebchaws.
Closer Saib Hauv Qhov Kev Kawm: Contest Oysters
Txawm hais tias MDE hais tias tsis muaj dab tsi ntshai thiab Navy cov tub ceev xwm hais tias tsis muaj pov thawj qhia tias PFAS kev sib kis tau kis tau dhau ntawm nws lub hauv paus, Dr. Kyla Bennett PEER Tus Thawj Coj ntawm Txoj Cai Kev Tshawb Fawb Txog Kev Tshawb Fawb hais tias lub xeev cov kev ntsuas tau dhau mus thov tias muaj kev noj qab haus huv tsawg nrog kev noj cov yoov tsiaj.
"Peb yuav tsum paub ntau ntxiv," nws hais.
Raws li cov Xov Xwm Bay Bennett tau hais tias muaj kev qhia sai nyob rau hauv lub xeev cov kev sim uas ua rau muaj kev cuam tshuam tsis muaj peev xwm los soj ntsuam kev mob nkeeg txaus ntshai. Piv txwv li, nws tau hais tias, kev ntsuam xyuas MDE "yuav tsis muaj peev xwm xaiv ib qho muaj teeb meem tshwj xeeb txawm tias muaj ntau ntau txhiab seem hauv ib feem pua. Ntxiv mus, nws hais tias, lub xeev tsuas sim tag nrho nws cov qauv rau 14 ntawm ntau tshaj 8,000 paub PFAS tebchaw. "
"Tau hais tias lawv ua tsis tau los sim rau tag nrho 36 [PFAS lub tebchaw] ntawm txhua qhov ntawm lawv cov chaw, vim tias kev tshawb pom qhov txwv los ntawm lawv qhov xwm txheej yog siab heev, txog 10,000 qhov ntawm ib trillion, los kos qhov xaus tias muaj kev pheej hmoo tsawg, kuv xav tias nws lav tsis tau, ”nws hais.
Kaum daim tawv me me los ntawm St. Niam Mab Liab pom ntawm kib lub tais kab npauj ntawm cov khw noj mov hauv thaj av ntawd tau muaj 500 grams ntawm oysters. Yog tias txhua lub oyster muaj 1,000 ppt ntawm cov tshuaj PFAS, uas yog tib yam li 1 feem ntawm 1 nphom, uas yog tib yam li XNUMX nanogram ib gram, (ng / g).
Yog li, 1 ng / gx 500 g (10 oysters) sib npaug 500 ng ntawm PFAS.
Hauv kev saib xyuas tsis muaj kev cai ntawm tsoomfwv thiab lub xeev, peb tuaj yeem saib mus rau European Food Safety Authority (EFSA) rau kev taw qhia, txawm hais tias ntau tus neeg saib xyuas kev noj qab haus huv tau hais tias lawv cov qib PFAS yog qhov txaus ntshai heev. Txawm li cas los xij, cov Tebchaws Europe tau ua ntej Asmeskas los tiv thaiv pej xeem kev noj qab haus huv kom tsis txhob raug cov tshuaj no.
Lub EFSA tau teeb tsa Lub Tswv Yim Ua Tau Zoo Nyob rau အပတ် (TWI) ntawm 4.4 nanograms ib phaus ntawm lub cev hnyav. (4.4 ng / kg / wk) rau PFAS tshuaj rau hauv cov khoom noj.
Yog li, ib tug neeg twg hnyav 150 phaus (68 kilos) tuaj yeem “nyab xeeb” haus 300 nanograms ib lub lim tiam. (ng / wk) [ntxwm 68 x 4.4] ntawm PFAS tshuaj lom neeg.
Cia peb hais tias ib tug neeg noj ib pluag mov ntawm 10 kib nqaij qaib uas hnyav 500 grams (.5 kg) uas muaj 500 ng / kg ntawm tshuaj PFAS.
[.5 kg ntawm oysters x 1,000 ng PFAS / kg = 500 ngs ntawm PFAS hauv pluas noj ntawd.]
Cov neeg European hais tias peb tsis txhob noj ntau tshaj 300 nanograms ntawm ib lub lim tiam ntawm PFAS cov tshuaj, yog li, ib qho kib oyster platter ntau tshaj li qib ntawd. Yog tias peb ua raws li lub luag haujlwm 1 ppt txhua hnub txwv qhov kev sib tw los ntawm Harvard Tsev Kawm Ntawv Kev Noj Qab Haus Huv lossis Pawg Ua Haujlwm Ib Puag Ncig, peb yuav txwv tsis pub noj ib qho me me ntawm Niam Mab Liab lub Hav Zoov tus dej txhua ob lub hlis. Nyob rau lub sijhawm no, Maryland hais tias kev muaj mob txaus ntshai los ntawm cov kab mob no yog “qis heev.”
Qhov teebmeem kev noj qab haus huv hauv tsoomfwv no yog tawm los ntawm cov xov xwm tshaj tawm uas mloog lus tshaj tawm hauv xeev thiab cov tub rog tshaj tawm txog kev tshawb xyuas tsis tseem ceeb. Cov pej xeem yuav xav li cas? Tseem ceeb tshaj, leej twg yuav tsum ntseeg pej xeem? Harvard Tsev Kawm Ntawv Kev Noj Qab Haus Huv? Cov European Khoom Noj Khoom Haus Kev Nyab Xeeb Kev Nyab Xeeb? lossis Republican-khiav tawm Maryland Lub Tsev Haujlwm ib puag ncig nrog cov ntawv sau txog kev tiv thaiv ib puag ncig kev txhawb nqa kev khiav haujlwm ntawm kev tiv thaiv EPA?
Tsis txhob noj cov yoov.
EFSA hais tias tias "ntses thiab lwm yam nqaij ntses" muaj txog li 86% ntawm kev noj zaub mov PFAS rau cov neeg laus. Feem ntau ntawm qhov kev sib kis no yog tsim los ntawm kev siv tsis tua hluav taws ntawm cov tub rog ntawm qhov chaw tub rog txij li xyoo 1970 los. Khoom noj khoom haus los ntawm cov liaj teb uas them los ntawm PFAS-laden sludge los ntawm cov chaw tub rog thiab chaw tsim khoom, tainted dej haus los ntawm cov khoom siv tib yam, thiab cov neeg siv khoom lag luam muaj ntau qhov seem ntawm cov chaw ua rau cov pej xeem noj PFAS.
rau kev siv lub logo ntawm Patuxent River Naval Air Station.
Closer Saib Hauv Kev Tshawb Fawb: Cov Dej Txheem
Cov ntaub ntawv tso tawm los ntawm MDE uas qhia cov qib theem 13.45 ng / l nyob hauv Niam Mab Liab lub Dej nyob ze Webster Field muaj kev ntxhov siab tshaj plaws vim tias lawv cuam tshuam txhua yam tsiaj muaj sia hauv dej. Tus kev tso cai ntau kawg rau qib PFAS hauv European Union is .13 ng / l hauv dej hiav txwv. Cov theem hauv St. Mary's dej yog 103 zaug ntawm theem ntawd.
In Pas dej Monoma, Wisconsin, ze rau Truax Field Air National Guard Base, dej kis nrog 15 ng / l ntawm PFAS. Cov kws kho mob txwv tsis pub noj nqaj ntses, pike, ntses bass, thiab perch rau ib pluag noj nyob rau ib hlis, txawm hais tias ntau tus kws saib xyuas kev noj qab haus huv tau hais tias cia muaj kev noj haus tsis muaj cai.
Nyob rau sab qab teb Bay ntawm San Francisco Bay, dej hiav txwv muaj tag nrho 10.87 ng / l ntawm PFAS tshuaj lom neeg. (qis dua St. Mary) Saib Daim Ntawv 2a. Bivalves tau pom ntawm 5.25 ng / g, lossis 5,250 ppt. Lub Pacific Staghorn Sculpin tau pom nyob rau hauv cheeb tsam ze nrog 241,000 ppt. ntawm PFAS. Zoo sib xws, ntawm Eden kev tsaws hauv San Francisco Bay, dej tau pom muaj 25.99 ng / l, thaum muaj ib lub bivalve muaj 76,300 ppt ntawm cov co toxins.
Hauv New Jersey, Echo Lake Reservoir muaj 24.3 ng / l thiab pom pom Cohansey River muaj 17.9 ng / l ntawm tag nrho PFAS. Cov Largemouth Bass tau pom nyob hauv Echo Lake Reservoir muaj 5,120 ppt ntawm tag nrho PFAS thaum lub sijhawm dej Cohansey muaj White Perch muaj 3,040 ppt ntawm PFAS. Muaj ntau cov ntaub ntawv muaj los ntawm lub xeev uas tau tiv thaiv pej xeem kev noj qab haus huv ntau dua li Maryland. Qhov taw tes ntawm no yog tias ntau ntawm cov tshuaj PFAS yog cov tsiaj txhu xyoob ntau nyob hauv dej hauv lub neej thiab hauv tib neeg.
Hauv xyoo 2002, txoj kev tshawb nrhiav uas tau tshwm sim hauv phau ntawv journal, Environmental Contamination thiab Toxicology tau tshaj tawm tus qauv oyster uas muaj 1,100 ng / g lossis 1,100,000 ppt ntawm PFOS, qhov muaj npe loj tshaj plaws ntawm PFAS "tshuaj mus ib txhis." Cov kab mob hu ua oyster tau nyob ntawm Hog Point hauv Chesapeake Bay, kwv yees li 3,000 ko taw los ntawm txoj kev khiav ntawm Patuxent River Naval Air Station. Niaj hnub no, daim ntawv tshaj tawm tshiab ntawm MDE uas piv txwv ntawm cov dej saum npoo av thiab cov kua muag khoom hauv tib thaj chaw rau PFAS pom "tsis muaj kev txhawj xeeb ntau ntau."
