4 The record articles

4 The Record is a publication of ALL4's RegTech Group that contains an in-depth look at hot technical and regulatory topics.


Bay Area AQMD Emergency Engine BACT Ruling

Posted: June 15th, 2021

On December 22, 2020, the California Bay Area Air Quality Management District (BAAQMD) adopted a new Guideline Document that revised the Best Available Control Technology (BACT) emissions standards found under BAAQMD Regulation 2, Rule 2 for emergency standby-power diesel-fired engines […]

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Meet Kevin Chaplin

Posted: June 14th, 2021

Kevin Chaplin // Senior Managing Consultant // Louisville, KY Office What are your roles at ALL4? As a Senior Managing Consultant I am responsible for people and projects in the Occupational Health & Safety and Industrial Hygiene practice areas.  While […]

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Texas’ Renewal of Stormwater Multi-Sector General Permit

Posted: June 9th, 2021

The Texas Commission on Environmental Quality (TCEQ) regulates facilities associated with industrial activity that discharge stormwater to surface water under the Stormwater Multi-Sector General Permit (MSGP), TXR050000.  This permit authorizes point source discharges associated with industrial activity and certain non-stormwater […]

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RACT III – Status Update and Compliance Considerations

Posted: June 2nd, 2021

On Wednesday, May 19, 2021, PADEP’s Reasonably Available Control Technology (RACT) rule (referred to herein the RACT III Rule) went to the Environmental Quality Board (EQB) for review and approval.  The proposed draft version of the rule as well as […]

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Meet Christina Lynch

Posted: June 1st, 2021

Christina Lynch // Managing Consultant // Philadelphia Office At the start of the year you transitioned back from parental leave, did you find yourself missing things on the work front? I absolutely loved being home with my daughter but I […]

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Refrigerant Rules: The Saga Continues

Posted: June 1st, 2021

In 2020, ALL4 provided several updates on important changes to refrigerant regulations at both the Federal and various state levels.  Due to the courts vacating portions of several rules under the Significant New Alternatives Policy (SNAP) program (i.e., SNAP Rules […]

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U.S. EPA Releases Updated Version (21112) of the AERMOD Modeling System

Posted: May 24th, 2021

On May 11, 2021, the United States Environmental Protection Agency (U.S. EPA) released an updated version of the American Meteorological Society/Environmental Protection Agency Regulatory Model (AERMOD) Modeling System.  The update, dated 21112, includes documentation, executables, and source code for the […]

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