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Industrial stack emissions monitoring ? Regulatory compliance and environmental policy updates ? Operation and maintenance of monitoring systems ? ...
A standard model run using the AERMOD air dispersion model produces numeric output with up to 13 significant figures (e.g., xxxxxxxx.xxxxx). Projects which use very low or very high emission rates may run into a problem where the values output by the model do not fit properly within this limit. For example, concentration values of 1E9 units or higher will result in a field of asterisks written to ...
While IT budgets prioritize logic-based security and cloud-native redundancy, Uptime Institute confirms that nearly 30% of all unplanned outages stem from environmental factors. Even the most resilient software architecture is at the mercy of its physical environment. Even the most resilient software architecture is at the mercy of its physical ...
For several years, the primary format used in AERMET’s Surface Pathway has been the Integrated Surface Hourly Database (ISHD) hosted by the National Centers for Environmental Information (NCEI). In late 2025, NCEI announced the retirement of their Integrated Surface Dataset (ISD) program and replaced it with the Global Historical Climatology Network hourly (GHCNh) dataset. ...
The AERMOD model can produce many different forms of output to support modelers’ needs. For example, highest values (or ranked values) tables are probably the most common form of output. These tables contain concentrations which are not paired in time across the domain but ranked in order from highest to lowest at each individual ...
When modeling with source groups in the AERMOD air dispersion model, it is not always obvious how much each source contributes to a calculated concentration. To facilitate source contribution analyses, AERMOD contains a routine called the EVENT model which can analyze user-specified events (e.g., design concentrations, threshold violations) and print each source’s contribution to the ...
There are many reasons why it may be necessary to create a copy of a modeling project. You may want to make edits to a scenario without overwriting previous results, or you need to re-run the project using a different set of meteorological data while maintaining the rest of the ...
Westminster, Colorado — October 14–16, 2025. The RemTEC & Emerging Contaminants Summit returns this week to The Westin Westminster, bringing together regulators, researchers, consultants, and solution providers to tackle the toughest questions in contaminated site assessment and remediation. Think PFAS treatment that actually scales, regulatory perspectives you can act on, and ...
Conference Dinner — sponsored by ESdat The ecoforum Conference Dinner, sponsored by ESdat Environmental Data Management Software, will be held on Wednesday 29 October—a relaxed chance to catch up, network and enjoy a great meal. ...
Did you know that a single license of AERMOD View allows you to perform multiple concurrent AERMOD runs on multiple computers? It’s true! When you install AERMOD View, several additional utility programs are included, and one of these – Batcher – allows modelers to set up a queue of model runs. Batcher can be executed from any computer where AERMOD View is installed even if the ...
Driven by user feedback and real-world workflow needs, this release delivers improved configuration and profile management, practical Field App refinements for fully electronic eCOCs, enhancements to Trend Analysis, addition of Logger Data Calculations, and a set of usability and bulk editing tools that reduce manual effort across common environmental data tasks. Main functional ...
Toronto, Canada – September 2025 – ESdat Environmental Data Management Software, developed by EarthScience Information Systems (EScIS), has been announced as a Gold Sponsor of the upcoming Excess Soils Symposium 2025, taking place on September 25, 2025, at the Toronto Region Board of Trade. ...
The CALPUFF air dispersion modeling system is extremely powerful and contains many refined features for users to conduct air modeling. A consequence of the model’s refined nature means some calculations can take a very long time to complete, however. Some situations may call for a modeler to conduct multiple model runs thus compounding the ...
Chicago, IL — ESdat Environmental Data Management Software is proud to announce its participation as an exhibitor at the National Brownfields Training Conference, taking place August 5–7, 2025, at McCormick Place in Chicago. Attendees can visit Booth #700 to see firsthand how ESdat simplifies environmental data management, from field data ...
In a recent client spotlight, Ken Dunlop, Environment Principal at Stanmore Resources Pty Ltd, shared how the mining company is leveraging ESdat Environmental Data Management Software to streamline its environmental monitoring and compliance programs. ...
Contour plots are one of the most common forms of output from air dispersion models. They are useful in quickly identifying maximum concentration as well as trends in the data, but they also require a careful eye to ensure proper ...
Key Changes:Perfluorooctanoic acid (PFOA): 200 nanograms per litre (ng/L)Perfluorooctane sulfonic acid (PFOS): 8 ng/LPerfluorohexane sulfonic acid (PFHxS): 30 ng/LPerfluorobutane sulfonic acid (PFBS): 1000 ng/L These values are based on current scientific evidence and aim to minimize health risks associated with PFAS exposure through drinking water. Key Takeaways for ...
The AERMOD model features default units for emission inputs and concentration or deposition outputs. Emissions are presented as grams per second (g/s), and concentrations are calculated as micrograms per cubic meter (µg/m3). However, there may come a time when these default units need to be changed to better represent project data. This change can be easily made via the Source Pathway ...
Assessments must be based on the Executive Office of Energy and Environmental Affairs (EOEEA) data. Applies to Permanent Solutions only. 6. ...
CALRoads View is Lakes Software’s interface for handling the CALINE series of air dispersion models. Used for assessing air pollutant concentrations from on-road emissions of motor vehicles, CALRoads View includes three models: CALINE4, CAL3QHC, and CAL3QHCR. Each of these models has unique requirements including how meteorological data is represented. In this tip, we look at how users can ...