# Trace

> One partner. Total ownership.

Trace is a vertically integrated leader in air emissions monitoring — we engineer, build, install, and service every CEMS and PEMS in-house. One accountable partner owns the outcome for the long term: the buck stops with us, with no change orders or finger-pointing.

## Company
- [Who we are](https://www.traceenv.com/#about): Regulatory compliance through innovation
- [Leadership](https://www.traceenv.com/leadership): Trace is run by a small group that has been in this work for decades — the same people who set the direction also answer for the work.
- [History](https://www.traceenv.com/history): Trace began in 1995 with a handful of engineers and a niche to fill. Three decades on, our systems run across the country and the same hands-on approach still defines the company. Here's the path that got us here.

## Products
- [CEMS — Continuous Emissions Monitoring Systems](https://www.traceenv.com/products/cems): Turnkey continuous emissions monitoring designed, built, and integrated in-house — certified hardware, DAHS software, and regulatory support under one roof. From first design through years of service, one team owns it
- [PEMS — Predictive Emissions Monitoring Systems](https://www.traceenv.com/products/pems): The PS-16 experts in predictive emissions monitoring — we built our system around EPA Performance Spec 16, the standard a PEMS has to certify to, and pioneered the first approved PEMS in double-digit U.S. states. A software-based alternative to CEMS that cuts hardware and maintenance costs, all on our Trace DAS platform
- [Trace DAS — Data Acquisition & Handling System (DAHS)](https://www.traceenv.com/products/trace-das): Our data acquisition and handling platform — the software layer that turns raw analyzer signals into compliant records, fully configurable calculations, and EPA-ready reports. The same DAHS behind every Trace CEMS and PEMS, on a secure web architecture that scales from a single source to a fleet

## OEM products ([catalog](https://www.traceenv.com/products/oem))
Emissions-monitoring equipment Trace builds or integrates — and supports and stands behind end to end.
### Process-based systems
- **CO₂ Scrubber CEMS** (Specialized continuous emissions monitor): Purpose-built for ethanol CO₂ scrubbers — continuously measures acetaldehyde, acrolein, formaldehyde, VOCs, methanol, ethanol, and more, eliminating costly stack testing while optimizing water and chemical use.
### Analyzers
- **Trace FTIR** (Multi-component gas analysis): A Fourier Transform Infrared (FTIR) analyzer that measures many gas species at once from a single hot, wet sample — ideal for compounds like HCl, HF, NH₃, and formaldehyde that conventional analyzers struggle with. Trace integrates, configures, and supports it as part of a complete system.
### Sampling & flow
- **HSC** (Heating Sample Conditioner): A self-contained sample oven delivering a filtered sample at a consistent temperature up to 400°F — engineered for “hot, wet” THC and FTIR sampling without cold spots or condensate.
- **CEMS Flow** (Stack flow monitor): A pitot-tube stack-flow monitoring system built for reliable, accurate, stable readings in harsh stacks — fully PS-6 compliant with automatic daily calibrations.
### Data acquisition & software
- **Trace DAS** (Air emissions software (DAHS)): Our web-based DAHS — the configurable data, calculation, and reporting layer behind every Trace CEMS and PEMS. The evolution of DAS 2000.
- **CEMSLog** (Data logger): A scalable data logger built specifically for stack monitoring — performs all locally required functions and expands when paired with Trace DAS. Interfaces with 40 CFR 60 and 40 CFR 75 systems.
- **IoT Monitoring** (Cloud-based emissions data assurance): Cloud-based oversight of your data acquisition system — 24/7 health monitoring that catches hardware and software issues before they become compliance problems, with secure off-site backups.

## Services
- [Parts](https://www.traceenv.com/services/parts): Your single-source contact for all CEMS service and replacement parts. When a component fails, every hour of downtime is a compliance risk. We get the parts that matter to you, fast.
- [Support](https://www.traceenv.com/services/support): Best-in-class support across parts, permanent and temporary CEMS, software for new and existing installations, and our team of regulatory experts. Our process is ticket-free, so support is fast and nothing sits in a queue.
- [Trailer Stack Testing](https://www.traceenv.com/services/stack-testing): Our mobile stack-testing trailer brings reference-method measurement straight to your stack. It's how we gather the real emissions data behind every PEMS model we build, and it's available on its own as a temporary CEMS on short notice, so you can keep operating.
- [Rental CEMS & Analyzers](https://www.traceenv.com/services/rentals): Rent a complete temporary CEMS or individual gas analyzers from Trace for planned outages, stack tests, bridging the gap before a permanent system, or trialing monitoring before you buy. Certified equipment, configured and supported by the same team that builds our permanent systems.

## Industries served
- [Ethanol](https://www.traceenv.com/industries/ethanol): 120+ ethanol plants — As the industry leader in continuous stack monitoring, Trace has systems installed at more than 120 ethanol production plants — with customized CEMS and PEMS tailored to each application.
- [Power Utility](https://www.traceenv.com/industries/power-utility): Fleet-wide DAHS — Trace delivers cutting-edge DAHS software and complete CEM systems to individual plants and fleet-based utilities, on a secure web architecture that shares data across sources, plants, and corporate users.
- [Data Centers](https://www.traceenv.com/industries/data-centers): Behind-the-meter power — Data centers can't wait years for a grid interconnection, so the largest operators are building behind-the-meter power on site — gas turbines, reciprocating engines, and fuel cells that energize the campus directly. Every one of those sources carries an air permit, and Trace is the monitoring partner the major players turn to so emissions compliance is one vendor they never have to think about.
- [Chemical](https://www.traceenv.com/industries/chemical): MACT compliant — Trace has systems installed at chemical plants across the country — monitoring process heaters, boilers, turbine incinerators, and more while keeping facilities compliant with state and federal rules like PVC MACT and Boiler MACT.
- [Waste-to-Energy](https://www.traceenv.com/industries/waste-to-energy): 45+ facilities — Trace is installed at more than 45 waste-to-energy facilities nationwide, pairing rugged CEMS hardware with DAHS software built for real-time compliance.
- [CHP / CUP University](https://www.traceenv.com/industries/chp-cup-university): Campus-wide CUPs — Trace runs systems across corporate, hospital, and university Combined Utility Plants — complete systems for new and replacement applications, plus component and DAHS upgrades for existing installations, all matched to your air permit.
- [Wastewater Treatment](https://www.traceenv.com/industries/wastewater-treatment): 30+ plants — Trace monitors more than 30 wastewater treatment plants running sludge incineration — tracking the full parameter set and staying compliant with 40 CFR Parts 60, 503, Subpart LLLL, and MMMM.
- [Refineries](https://www.traceenv.com/industries/refineries): 20+ years — Trace has installed CEMS and DAS in petrochemical and refining applications for more than two decades, staying current with the latest air regulations including NESHAP and other state and federal standards.
- [Marketing Storage Terminals](https://www.traceenv.com/industries/marketing-storage-terminals): 45+ terminals — Trace monitors more than 45 storage terminals nationwide, continuously measuring emissions from Vapor Combustor Units (VCUs) and Vapor Recovery Units (VRUs) at marine and truck loading racks.

## Permits & regulations
- [Title V Operating Permits](https://www.epa.gov/title-v-operating-permits)
- [PSD — Prevention of Significant Deterioration](https://www.epa.gov/nsr/prevention-significant-deterioration-basic-information)
- [New Source Review (NSR)](https://www.epa.gov/nsr)
- [State Implementation Plan (SIP) limits](https://www.epa.gov/air-quality-implementation-plans/basic-information-about-air-quality-sips)
- [40 CFR Part 60](https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-60): NSPS — New Source Performance Standards
- [40 CFR Part 63](https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-63): NESHAP / MACT standards
- [40 CFR Part 64](https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-64): CAM — Compliance Assurance Monitoring
- [40 CFR Part 75](https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-75): Acid Rain Program / CSAPR CEMS
- [PS-16](https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-60/appendix-Appendix%20B%20to%20Part%2060): PEMS Performance Spec (40 CFR 60 App. B) — our specialty
- [Part 60, App. B & F](https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-60/appendix-Appendix%20F%20to%20Part%2060): Performance specs & QA — RATA, linearity, CGA

## FAQ ([all questions](https://www.traceenv.com/faq))
### What is a CEMS (Continuous Emissions Monitoring System)?
A CEMS is a hardware-based system — gas analyzers, sample conditioning, stack-flow metering, and data-handling software — that continuously measures the pollutants and diluents leaving a stack. It produces the continuous record used to demonstrate compliance with an air permit and federal rules such as 40 CFR Parts 60, 63, and 75. Trace engineers, builds, installs, certifies, and services complete CEMS in-house.

### What is the difference between CEMS and PEMS — which one do I need?
A CEMS measures emissions directly with stack analyzers. A PEMS (Predictive Emissions Monitoring System) instead predicts emissions with a software model built from process parameters you already measure, which can cut analyzer and maintenance costs. Which one fits depends on your source, your air permit, and whether your regulator will accept a PEMS. Trace reviews your permit, evaluates the application, and gauges your regulator's buy-in before you commit — no purchase order required.

### What is EPA Performance Specification 16 (PS-16)?
PS-16 is the EPA performance specification, found in Appendix B to 40 CFR Part 60, that a predictive emissions monitoring system must certify to. It defines how a PEMS is initially validated and the ongoing quality-assurance it must meet — in effect, the standard that governs whether a PEMS is acceptable for compliance. Trace engineered its PEMS around PS-16 and pioneered the first approved PEMS in double-digit U.S. states.

### Does 40 CFR Part 60 require a CEMS?
It depends on your specific source and subpart. Many New Source Performance Standards (NSPS) under Part 60 require continuous monitoring, but whether that means a CEMS, a PEMS, or another approach is set by the applicable subpart and your air permit. The only reliable answer comes from reading the permit and the rule that applies to your source — which Trace will do for you.

### What is a RATA (Relative Accuracy Test Audit)?
A RATA is a field test that compares your monitoring system's readings against an independent EPA reference method to confirm the system is accurate. It is required to certify a CEMS or PEMS and to keep it certified through periodic quality assurance, under requirements such as 40 CFR Part 60 Appendices B and F and 40 CFR Part 75. Trace performs and supports RATA testing as part of its service.

### What is a DAHS, and what is Trace DAS?
A DAHS (Data Acquisition and Handling System) is the software layer that collects signals from your monitors, applies the calculations and averaging your permit requires, stores the records, and generates EPA-ready compliance reports. Trace DAS is Trace's web-based DAHS — the same platform behind every Trace CEMS and PEMS, with fully configurable calculation profiles and access that scales from a single source to a fleet.

### What pollutants and parameters can Trace monitor?
Across its installations Trace monitors NOₓ, CO, O₂, SO₂, VOCs, total hydrocarbons (THC), and stack flow, plus specialized compounds such as HCl, HF, NH₃, and formaldehyde using FTIR. Systems are matched to the parameters your specific permit and process require.

### Does Trace install and service systems nationwide?
Yes. Trace is headquartered in Sparta, New Jersey and backs more than 400 installations across the United States with parts, field service, and remote DAS support. Its work spans ethanol, power and behind-the-meter data-center generation, waste-to-energy, chemical, refining, wastewater treatment, marketing storage terminals, and campus combined-utility plants.

## Contact
- Email: sales@traceenv.com
- Phone: (973) 383-3550
- Hours: Mon–Fri, 8am–5pm
- Website: https://www.traceenv.com