A recent forum conducted by the Consumer Product Safety Commission (CPSC) focused on the safety and testing of Lithium-ion batteries.  Lithium-ion batteries are used in a wide range of applications including mobile phones, laptops, cameras, power tools, scooters, and vehicles.  These batteries have been lauded for their wide range of application, high energy density power, and life cycle, but that doesn’t mean these batteries come without risks.

Lithium-ion batteries in micromobility products such as e-bikes, e-scooters, and hoverboards have become a leader in fire and overheating incidents according to the forum background information provided by the CPSC.  At least 208 instances reported across 39 states in a span of almost 2 years.  According to the Fire Department of New York (FDNY) representative for the forum, Lithium-ion battery involved fires have become a top cause of fatalities in New York.

So what’s the problem?

Experts in the forum were able to outline some of the main problems with Lithium-ion batteries.  One such problem was the lack of certification of the batteries.  Certifications are not always coming from certified institutes or counterfeit certifications are being applied after maintenance is conducted.  A second problem may be disparities in the internal construction of the battery packs, which can lead to charging issues or thermal runaway.  Thermal runaway of the batteries lead to larger, more sustained fires while also producing toxic fumes.  The final problem they noted was the availability of cheaper, readily available, aftermarket products that don’t have the same efficiencies and certifications as the original products.

Make sure that you are following the manufacturer’s recommendations for the usage, charging, maintenance, and storage of your batteries.  For more information, you can watch the CPSC’s panel on Lithium-ion Battery Safety here.

On January 6, 2023, EPA published a proposed rule for particulate matter National Ambient Air Quality Standard (NAAQS) that would retain the primary 24-hr PM_2.5 standard (35 µg/m³) and reduce the annual standard from 12 µg/m³ to 9 µg/m³. The agency is also taking comments on reducing the 24-hr PM­_2.5 standard as low as 25 µg/m³ and the annual standard as low as 8 µg/m³. The Clean Air Act requires that EPA review the NAAQS every five years to ensure their adequacy. The last review of the PM NAAQS was completed in December 2020 with no change, but EPA announced their decision to reconsider this action in June 2021.  Although no changes to the PM₁₀ NAAQS standard are expected at this time, changes to the PM2.5 NAAQS standard are proposed.

This proposal takes into account thousands of scientific studies since the last update of PM NAAQS in 2012 that have demonstrated the dangers of long term soot exposure. The evidence supports a likely relationship between long-term PM_2.5 exposure and respiratory effects, nervous system effects, and cancer. EPA estimates that if finalized, a strengthened annual PM_2.5 standard of 9 µg/m³ would:

• Prevent up to 4,2000 premature deaths per year;
• Prevent 270,000 lost workdays per year; and
• Result in as much as $43 billion in net health benefits in 2032.

EPA accepted public comments on the proposed rule through March 7th and has already held public hearings. Additional information will be made available on the National Ambient Air Quality Standards (NAAQS) for PM webpage.

State, local, and tribal air agencies will be required to use this standard after it is finalized federally. Once in effect, this will cause more difficulty when emission units require PM_2.5 modeling as part of a permit application or modification. Several areas throughout the Pacific Northwest have high particulate background concentrations, which will narrow the allowable “new” particulate emitted even further. If you are planning any facility expansions or new sources that include particulate matter emissions and want to know if this rule would effect your business, please contact Spring Environmental for more information.