EDF Health

What dense sensor networks can teach us about air pollution

By Maria Harris / Published: May 21, 2019

Maria Harris is an Environmental Epidemiologist.

It all started with a challenge in 2013: how to engineer pollution-sensing balloons. Thomas Kirchstetter, Adjunct Professor at the University of California, Berkeley and the Director of the Energy Analysis and Environmental Impacts Division at Lawrence Berkeley National Lab, wanted to attach pollution sensors to high altitude weather balloons to measure how black carbon moves throughout the atmosphere.

Black carbon “soot” is emitted from diesel engines on trucks, locomotives, and ships, as well as from wildfires and the combustion of solid fuels for cooking and heating. But available technology to measure this air pollutant wasn’t well suited to handle the changes in temperature and humidity experienced during its ascent through the atmosphere or affordable enough to scale. So, he and Berkeley graduate students Danny Wilson and Julien Caubel researched what it would take to create their own.

Meanwhile, Kirchstetter had been in touch with Joshua Apte, assistant professor at the University of Texas at Austin, about his work leading Environmental Defense Fund’s mobile pollution monitoring study using Google Street View cars to measure air quality in Oakland. Apte asked Kirchstetter to support the team’s analysis as they examined how pollution concentrations varied from block to block—including black carbon. That’s when a lightbulb went off for Kirchstetter.

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Posted in Air pollution, Hyperlocal mapping, Public health / Tagged , , | Comments are closed

Round 2 on PV29 reveals even deeper flaws in EPA’s TSCA risk evaluation of the chemical

By / Published: May 20, 2019

Richard Denison, Ph.D., is a Lead Senior Scientist.

On Friday, Environmental Defense Fund (EDF) submitted a new set of extensive comments to the Environmental Protection Agency (EPA) in response to its March release of additional information on Pigment Violet 29 (PV29), the first chemical to undergo a risk evaluation under the Toxic Substances Control Act (TSCA) following the law’s amendment in 2016.

After EDF and others criticized both the dearth of health and environmental data on PV29, and EPA’s illegal withholding of those data, EPA released some additional information and opened a new comment period in mid-April.  In releasing the new information, EPA was quick to judgment, asserting that “[t]he release of these studies does not change the Agency’s proposed ‘no unreasonable risk’ determination as concluded in the draft risk evaluation published in November.”

EDF’s 100 pages of comments in Round 1 enumerated the myriad ways EPA has failed to demonstrate that PV29 does not present unreasonable risk.  Unfortunately, if anything, Round 2 has only deepened our concerns over the inadequacy of EPA’s risk evaluation.   Read More »

Posted in Health policy, Industry influence, Regulation, TSCA reform / Tagged , , , | Comments are closed

EPA says PV29 is perfectly safe. The EU, citing concerns and a dearth of data, begs to differ.

By / Published: May 7, 2019

Richard Denison, Ph.D., is a Lead Senior Scientist.

In contrast to the Environmental Protection Agency’s (EPA) asserted clean bill of health for Pigment Violet 29 (PV29) in its draft risk evaluation, authorities under the European Union’s REACH program have formally declared the chemical to be a suspected persistent, bioaccumulative and toxic (PBT) substance and a suspected very persistent and very bioaccumulative (vPvB) substance.  Either designation, if confirmed, would classify PV29 as a substance of very high concern (SVHC) under the EU’s REACH Regulation.

In EDF’s earlier comments on EPA’s draft risk evaluation, we noted that PV29 had been proposed to be so listed under REACH and to undergo a full substance evaluation in 2021.  Since we filed those comments, the European Chemicals Agency (ECHA) has published an update to its Community Rolling Action Plan (CoRAP) that now formally designates PV29 as a “suspected PBT/vPvB” that will be subject to a full substance evaluation.  The listing is accompanied by a “justification document” for PV29’s designation.

The justification document, prepared by the Belgian Competent Authority (BE CA) under REACH and endorsed by REACH authorities, echoes many of the concerns about PV29 and EPA’s draft risk evaluation that EDF had raised in our earlier comments.   Read More »

Posted in Health policy, International, TSCA reform / Tagged , , | Comments are closed

EPA’s safety standard for perchlorate in water should prioritize kids’ health

By Tom Neltner, Senior Director, Safer Chemicals Initiative / Published: May 7, 2019

Tom Neltner, J.D., is Chemicals Policy Director and Maricel Maffini, Ph.D., Consultant

The Environmental Protection Agency (EPA) will soon propose a drinking water standard for perchlorate. The decision – due by the end of May per a consent decree with the Natural Resources Defense Council (NRDC)— will end a nearly decade-long process to regulate the chemical that has been shown to harm children’s brain development.

In making its decision, EPA must propose a Maximum Contaminant Level Goal (MCLG) “at the level at which no known or anticipated adverse effects on the health of persons occur and which allows an adequate margin of safety.”[1] It must also set a Maximum Contaminant Level (MCL) as close to the MCLG as feasible using the best available treatment technology and taking cost into consideration.

To guide that decision, EPA’s scientists developed a sophisticated model that considers the impact of perchlorate on the development of the fetal brain in the first trimester when the fetus is particularly vulnerable to the chemical’s disruption of the proper function of the maternal thyroid gland. As discussed more below, the model was embraced by an expert panel of independent scientists through a transparent, public process that included public comments and public meetings.

In April, a consulting firm published a study critiquing EPA’s model. The authors acknowledged the model as a valuable research tool but did not think it is sufficient to use in regulatory decision-making due to uncertainties. Therefore, the authors concluded that EPA should discard the peer-reviewed model and rely on a 14-year old calculation of a “safe dose” that does not consider the latest scientific evidence and has even greater uncertainties. They didn’t offer other options such as using uncertainty factors to address their concerns about the model’s estimated values.

Given the importance of the issue and the risk to children’s brain development, we want to explain EPA’s model, the process the agency used to develop it, and the study raising doubt about the model.

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Posted in Drinking water, Health policy, Health science, Industry influence, Perchlorate / Tagged , , , | Read 2 Responses

Too much cadmium and lead in kids’ food according to estimates by FDA

By Tom Neltner, Senior Director, Safer Chemicals Initiative / Published: May 7, 2019

Tom Neltner, J.D., Chemicals Policy Director and Maricel Maffini, Ph.D., Consultant

The Food and Drug Administration (FDA) released a study in April estimating young children’s exposure to lead and cadmium from their diets and identifying food groups that are a significant source of these heavy metals. The study used data from the agency’s Total Diet Study (TDS) program for 2014 to 2016 and the Center for Disease Control and Prevention’s (CDC) What We Eat in America (WWEIA) Survey for 2009 to 2014.[1]

The study is a reminder of how pervasive heavy metals are in children’s diets and that, while the levels are relatively low, the cumulative exposure is significant. Based on FDA’s analysis (Table 1 below), we estimate that about 2.2 million children exceeded the agency’s maximum daily intake (MDI) for lead at a given time. The results for cadmium are new and worrisome, with estimated daily intake (EDI) levels that are 3 to 4 times greater than lead. And while FDA has not yet set an MDI limit for cadmium, the average young child exceeds most of the relevant daily exposure limits set by other agencies. Clearly, cadmium warrants greater attention, but note that the evidence of neurotoxicity is still emerging.

Table 1: Young children’s estimated dietary intake (EDI) of lead and cadmium based on FDA’s TDS results for years 2014 to 2016 (based on hybrid method)

Age GroupLead Mean EDI Lead 90th Percentile EDICadmium Mean EDICadmium 90th Percentile EDI
1-6 years1.8 µg/day2.9 µg/day6.8 µg/day11.0 µg/day
1-3 years1.7 µg/day2.6 µg/day5.8 µg/day9.7 µg/day
4-6 years2.0 µg/day3.1 µg/day7.8 µg/day12.1 µg/day
LimitsFDA’s MDI is 3.0No MDL set by FDA. Intake exceeded most limits set by other agencies

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Posted in FDA, Food, Lead / Tagged , , , , | Comments are closed

EDF tells EPA it must modify its proposed CBI Claim Review Rule to comply with recent D.C. Circuit decision

By / Published: May 3, 2019

Richard Denison, Ph.D., is a Lead Senior Scientist.

Yesterday Environmental Defense Fund (EDF) sent a letter to the Assistant Administrator of EPA’s Office of Chemical Safety and Pollution Prevention in follow-up to last month’s decision by the D.C. Circuit Court of Appeals in EDF’s challenge to EPA’s Inventory Notification Rule (EDF v. EPA, 17-1201).

The letter identifies “immediate, time-sensitive implications [of the decision] for EPA’s ongoing rulemaking for” EPA’s proposed Confidential Business Information (CBI) Claim Review Rule, which is currently undergoing public comment.  EDF noted that, in addition to addressing problems the Court identified in EPA’s regulations promulgated pursuant to its Inventory Notification Rule, EPA will need to modify the current proposed rule to ensure it is consistent with the Court’s Opinion, and accept comments on the modified proposal.

This is because the proposed rule explicitly references and applies regulatory provisions that the Court found were unlawful.  Specifically, the Court found that EPA’s CBI claim substantiation questions were flawed because they failed to inquire into “a chemical identity’s susceptibility to reverse engineering” and “effectively excised a statutorily required criterion from the substantiation process.”  Hence, to align the proposed rule with the Court’s ruling and the representations that EPA made to the Court in its briefing and at argument, EPA will need to revise the substantiation questions and the substantive standard that EPA plans to use when reviewing claims under the CBI Claim Review Rule.

EDFs letter also notes that the proposed rule allows persons to rely on the voluntary substantiations they submitted as part of the Inventory notification process.  But the Court’s Opinion establishes that these substantiations are inadequate because they fail to address a chemical’s susceptibility to reverse engineering, and EPA will need to modify the proposed rule to require companies to provide substantiations that address this statutory factor for confidentiality claims.

See EDF’s letter for more details.

Posted in Health policy, TSCA reform / Tagged , , | Comments are closed