4 The Record is a publication from ALL4’s team that takes an in-depth look at technical and regulatory topics.
CMS Daily Calibration Tolerances: Could You Be Operating to Double the Allowable Standard?
Posted: July 9th, 2019
Within various subparts of 40 CFR Part 63, there are General Provisions applicability tables, detailing which general provisions are applicable to the source category regulated by the corresponding subpart. The format and location of this table often varies between subparts, […]
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ePermitting Coming to South Carolina
Posted: July 3rd, 2019
The South Carolina Department of Health and Environmental Control (DHEC) is in the process of implementing an electronic system (i.e., ePermitting) for compliance and permitting actions for regulated facilities in South Carolina. Through this system, regulated facilities will be able […]
Read articleEmission Event Investigations: What the TCEQ thinks you need to know
Posted: July 1st, 2019
ALL4 attended the Texas Commission on Environmental Quality (TCEQ) Trade Fair May 14-15, 2019 to stay up to date on changes in permitting and compliance. Although there were only a few updates regarding the minor New Source Review (NSR) application […]
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New Jersey CEMS Quality Assurance Requirements for Non-Operating Quarters
Posted: June 25th, 2019
On May 21, 2019, the New Jersey Department of Environmental Protection (NJDEP) Emission Measurement Section (EMS) issued clarifications to Technical Manual #1005 (TM1005). These clarifications were sent out via email through the EMS Listserv and are intended to provide clarification […]
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What is the U.S. EPA Air Office Working on These Days?
Posted: June 21st, 2019
Update: On June 26, 2019, U.S. EPA Assistant Administrator Bill Wehrum has stepped down from his role in the Office of Air and Radiation. The regulated community may see delays in rulemaking until a permanent replacement is named. Please check […]
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A Message to Our Clients – Growth at ALL4…
Posted: June 18th, 2019
“Growth” is a word that has been used A LOT here at ALL4 recently. Whether it is growth in the number of consultants, or new offices (check out our new Raleigh Office Announcement), or new leadership and technical opportunities for […]
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Texas SIP Emission Inventory Revisions for Sites in Bexar County
Posted: June 13th, 2019
In case you have not been following, the U.S. Environmental Protection Agency (U.S. EPA) designated Bexar County (San Antonio area) as nonattainment for the 2015 eight-hour ozone National Ambient Air Quality Standard (NAAQS). This designation was effective on September 24, […]
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Georgia Permittees (Major, Minor, and Synthetic Minor): Permit Application Fees are in Effect
Posted: June 10th, 2019
Last year ALL4 published a blog post covering the proposed amendments to Georgia Administrative Code (G.A.C.) 391-3-1-.03(9), which addressed Georgia’s proposed air permit application fees. The permit application fees were adopted into rule in April 2018 and officially went into […]
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The Ever-Evolving Science of Air Quality Modeling
Posted: June 3rd, 2019
One of the reasons I’ve enjoyed air quality modeling during my 16-year career with ALL4 is because it’s an ever-evolving science. The air quality modeling that I was learning and conducting 16 years ago is vastly different than the air […]
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So, You Thought You Were Through With RACT 2 – Think Again
Posted: May 22nd, 2019
On April 23, 2016, the Pennsylvania “RACT 2 Rule” (i.e., Additional RACT Requirements for Major Sources of NOX and VOCs) was published final in the Pennsylvania Bulletin. The rule includes provisions intended to meet Reasonably Available Control Technology (RACT) requirements […]
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