Environmental Technology Verification (ETV) Joint Verification Statement - Continuous Ambient Mass Monitor

Sep 2, 2026

The document presents an ETV Joint Verification Statement for the Thermo Andersen continuous ambient mass monitor (CAMM), specifying its application for measuring fine particulate mass in ambient air. It summarizes how the ETV program verifies innovative environmental technologies through test plan development, field or laboratory testing, data collection and analysis, and peer-reviewed reporting under rigorous quality assurance protocols. The statement covers evaluation results across monitoring phases, including regression performance, meteorological and precursor gas influences, short-term comparisons, and maintenance or troubleshooting actions that affected data recovery.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages50

Reading Time2 h 6 min

AccessFree to download

ETV Joint Verification Statement

Technology type and application

ETV verification process and quality assurance

AMS Center evaluation summary

Test results and influencing factors

Monitoring duration and maintenance notes

| THE ENVIRONMENTAL TECHNOLOGY VERIFICATION | | | | --- | --- | --- | |
U.S. Environmental Protection Agency | | | | ETV Joint Verification Statement
TECHNOLOGY TYPE: Continuous Ambient Mass Monitor
APPLICATION: MEASURING FINE PARTICULATE MASS IN
AMBIENT AIR
TECHNOLOGY
NAME: Continuous Ambient Mass Monitor
COMPANY: Thermo Andersen
ADDRESS: 500 Technology Court PHONE: 800-241-6898
Smyrna, GA 30082 FAX: 770-319-9999
WEB SITE: [http://www.AndersenInstruments.com](http://www.AndersenInstruments.com)
E-MAIL: [sales@AndersenInstruments.com](sales@AndersenInstruments.com)
The U.S. Environmental Protection Agency (EPA) has created the Environmental Technology Verification (ETV) Program to facilitate the deployment of innovative or improved environmental technologies through performance verification and dissemination of information. The goal of the ETV Program is to further environmental protection by substantially accelerating the acceptance and use of improved and cost-effective technologies. ETV seeks to achieve this goal by providing high-quality, peer-reviewed data on technology performance to those involved in the design, distribution, financing, permitting, purchase, and use of environmental technologies.
ETV works in partnership with recognized standards and testing organizations; with stakeholder groups that consist of buyers, vendor organizations, and permitters; and with the full participation of individual technology developers. The program evaluates the performance of innovative technologies by developing test plans that are responsive to the needs of stakeholders, conducting field or laboratory tests (as appropriate), collecting and analyzing data, and preparing peer-reviewed reports. All evaluations are conducted in accordance with rigorous quality assurance protocols to ensure that data of known and adequate quality are generated and that the results are defensible.
The Advanced Monitoring Systems (AMS) Center, one of six technology centers under ETV, is operated by Battelle in cooperation with EPA’s National Exposure Research Laboratory. The AMS Center has recently evaluated the performance of continuous monitors used to measure fine particulate mass and species in ambient air. This verification statement provides a summary of the test results for the Thermo Andersen continuous ambient mass monitor (CAMM) . | | | | respectively, and no statistically significant intercept was observed in either case at the 95% confidence level. The regression results show r2 values of 0.809 and 0.843 for Monitor 1 and Monitor 2, respectively.
Meteorological Effects: Multivariable analysis shows that none of the meteorological parameters measured during Phase I influenced the readings of the CAMM relative to the FRM at the 90% confidence level. Multivariable analysis showed that, during Phase II, relative humidity had a statistically significant (90% confidence) influence on the readings of one of the duplicate CAMMs. However, this effect was largely canceled out by the intercept of the regression analysis, and was of no practical significance.
Influence of Precursor Gases: None of the precursor gases had a statistically significant effect (90% confidence) on the readings of the CAMM during Phase I or Phase II.
Short-Term Monitoring: In addition to 24-hour FRM samples, short-term sampling was performed on a five sample-per-day basis during Phase II only. The results from the duplicate CAMMs were independently averaged for each of the sampling periods and compared with the gravimetric results. Considering all of the short-term data together, linear regression showed slopes of 1.27 and 1.15, respectively, for Monitor 1 and Monitor 2. The intercepts of the regression lines were 13.1 and 15.6 µg/m3, respectively; and the r2 values were 0.716 and 0 .666, respectively.
Other Parameters: The CAMMs required some maintenance during both phases of verification testing. During Phase I, the

FAQs

What technology is verified in this statement?

The Thermo Andersen continuous ambient mass monitor (CAMM) is verified as a continuous ambient mass monitor for measuring fine particulate mass in ambient air.

How does the ETV program verify environmental technologies?

It develops test plans for stakeholder needs, performs field or laboratory tests as appropriate, collects and analyzes data, and prepares peer-reviewed reports using rigorous quality assurance protocols.

What factors were assessed for their influence on CAMM readings?

The statement evaluates meteorological effects and precursor gases, and it also discusses short-term monitoring comparisons and maintenance activities that can affect measurements.

Sep 2, 2026

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