4 The record articles

4 The Record is a publication from ALL4’s team that takes an in-depth look at technical and regulatory topics.

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OSHA Walkaround Rule Change

Posted: April 9th, 2024

Will the OSHA workplace inspection process change? It does appear that changes are on the horizon. On August 30, 2023, the Occupational Safety and Health Administration (OSHA) published in the Federal Register a notice of proposed rulemaking (NPRM) titled “Worker […]

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PFAS Now in Ambient Air and a Vapor Intrusion Risk?

Posted: April 4th, 2024

Vapor Intrusion (VI) is the process in which contaminants in subsurface soil or water migrate upwards into the ambient air. This poses a risk to indoor air quality in buildings which have been constructed over contaminated sites. The most common […]

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Ambient Air Monitoring: Where Are We Headed?

Posted: April 2nd, 2024

We have seen a flurry of activity lately from the United States Environmental Protection Agency (U.S. EPA), including several rules that have ambient air monitoring implications. U.S. EPA recently lowered the annual National Ambient Air Quality Standard (NAAQS) for particulate […]

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Final Reconsideration Rules for Chemicals and Refineries

Posted: March 28th, 2024

The U.S. Environmental Protection Agency (U.S. EPA) is finalizing changes to petroleum and chemical sector rules in response to petitions for reconsideration following recent risk and technology review (RTR) rulemakings. These rules include the National Emission Standards for Hazardous Air […]

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New Approved PFAS Testing Methods

Posted: March 27th, 2024

As a follow up to our 2024 PFAS Look Ahead, the U.S. Environmental Protection Agency (EPA) Office of Water published Methods 1633 and 1621 in January. In the past, Method 537.1 has been modified to meet analytical needs. With the […]

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D.C. Circuit Vacates U.S. EPA’s SSM SIP Call

Posted: March 21st, 2024

On March 1, 2024, the U.S. Court of Appeals for the District of Columbia (D.C.) Circuit decided 2 to 1 to vacate the United States Environmental Protection Agency’s (U.S. EPA’s) State Implementation Plan Call with respect to certain startup, shutdown, […]

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Enforcement Alert – BWON

Posted: March 19th, 2024

In February 2024, the United States Environmental Protection Agency (U.S. EPA) Office of Civil Enforcement issued a long expected Enforcement Alert targeting facilities subject to 40 CFR Part 61 Subpart FF – National Emission Standard for Benzene Waste Operations (BWON).  […]

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