INDUSTRY LEADERS IN AIR EMISSIONS COMPLIANCE
We help industrial plants comply with clean air regulations by providing Continuous Emissions Monitoring (CEM) solutions.
Alliance Technical Group Acquires ESC Spectrum, Cementing Global Leadership in Continuous Emissions Monitoring (CEMS) and Data Acquisition Systems (DAS)
ESC Spectrum is now part of Alliance Technical Group, combining forces to deliver the most comprehensive CEMS and DAS compliance platform in the industry. This strategic acquisition strengthens our ability to serve customers with expanded resources, nationwide support, and end-to-end environmental solutions.
ESC Spectrum's Products and Services
Comprehensive Emissions Monitoring Guide for Refining and Petrochemical Facilities
Your go-to resource for compliance, technology, flaring, and regulatory insights for refinery emissions monitoring.
Featured Videos
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What does it take to rethink how emissions monitoring works under Part 75? In this video, we talk with the engineers who partnered with EPRI and designed ESC Spectrum’s Integrated Path (IP) CEMS—an innovative approach using optical in-situ technology that simplifies compliance by removing traditional extractive system components.
Discover the groundbreaking work behind the EPRI x ESC Spectrum IP CEMS Project in this exclusive interview with Richard Himes, PE, EPRI Technical Executive. Learn how this collaboration advances emissions monitoring technology, including key details about the project’s goals, challenges, and innovative solutions.
Hear from Derek Burk of Genesee Power Station as he shares how ESC Spectrum’s DASProtect Fortress, Part 75 Reporting Services, and 24/7/365 customer support have simplified the compliance and emissions monitoring process. From seamless reporting to unmatched support, discover why Genesee Power Station trusts ESC Spectrum to meet its environmental compliance needs.
Explore StackVision, ESC Spectrum’s cutting-edge Data Acquisition System (DAS) designed for effortless environmental compliance. With real-time data monitoring, user-friendly customization, and superior reliability, StackVision helps facilities easily meet regulatory standards. Discover why it’s the go-to solution for over 3,100 air emissions sources.
In this video, you will learn a general overview of how a Continuous Emissions Monitoring System (CEMS) works. A CEMS provides an efficient and effective way to monitor stack emissions on a continuous basis and provide the EPA with the data needed to enforce mandated reductions in the number of pollutants emitted.
This video provides a general overview of how a Data Acquisition System (DAS) works. A DAS is a set of tools for continuously collecting and validating your emissions data for air compliance reporting. See how both hardware and software work together to continuously collect and validate air emissions monitoring data.
Latest Posts From The Source Blog
Air Emissions Calibration Testing: Staying Compliant With Daily and Quarterly Requirements
Accurate air emissions calibration testing is essential for maintaining compliance and ensuring reliable CEMS performance. This blog breaks down daily and quarterly calibration test requirements, explains how offline calibrations are used, and clarifies what causes out-of-control data.
Alliance Technical Group Acquires ESC Spectrum, Cementing Global Leadership in Continuous Emissions Monitoring (CEMS) and Data Acquisition Systems (DAS)
ESC Spectrum is now part of Alliance Technical Group, combining forces to deliver the most comprehensive CEMS and DAS compliance platform in the industry. This strategic acquisition strengthens our ability to serve customers with expanded resources, nationwide support, and end-to-end environmental solutions.
CEMS Probe Maintenance: Extractive vs. Dilution Systems
CEMS probes are the first point of contact with the gas sample line in your emissions monitoring system. Discover why routine maintenance is critical—and how to do it right.
Where to Install CEMS Probes, Flow Sensors & Opacity Monitors (According to EPA Guidelines)
In this article, read about where you can locate your plant’s CEMS Probes, Flow Probes & Opacity Units on your stack unit & what EPA regulations apply to them.
CEMS Filter Maintenance Tips for Reliable Performance
Regular CEMS filter maintenance is one of the easiest, and most effective, ways to ensure accurate emissions data and keep your system running smoothly. This article covers why filter care matters, and best practices to keep your system running smoothly year-round.
CEMS Fails From the Field: What Went Wrong & How to Fix It
Discover the top causes of CEM system failures and how to prevent them. Get expert troubleshooting advice and maintenance strategies to reduce downtime.
ESC Spectrum Launches Interim Reporting Services to Support Facilities with Temporary Help
ESC Spectrum is excited to introduce Interim Reporting Services, designed to help facilities maintain compliance during short-term staffing challenges. Our expert team provides support with data review, permit compliance, QA/QC management, and more—ensuring critical reporting obligations are met accurately and on time.