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The Active National Directory Of Source Emissions Testing
U.S. EPA Clean Air Excellence Award Recipient
U.S. EPA Clean Air Excellence Award Recipient
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Visitor Support

Visitor FAQs
Our visitors consist of a worldwide audience of air quality professionals, industrial managers, regulatory personnel, engineers and environmental consultants.
Our objective is to provide free access to stack testing services and technical resources to the vanguards of the air pollution control industry. is devoted to providing this interactive reference site for a variety of industrial air pollution testing and control issues.


Is a free reference site?

YES. There are no registration requirements nor membership fees for visitors to use the free resources and Directories as a reference tool for finding or buying industrial source emission testing, services or equipment.
For a visitor's guide to the reference sections and resources on Click Here


Can a specialist answer my questions about air pollution testing, analysis or equipment?

YES. There are four ways to present your questions:

1. Locate a stack testing firm in your geographic location and contact them directly Click Here
2. Contact an equipment manufacturer or analytical lab Click Here
3. Post your questions on the SET Wire! bulletin board
Click Here
4. Use the "Ask The Experts"
one-on-one forum Click Here


Can the search engine find what I need?

YES! You'll find every listing for a single company by entering their name. The site's own built-in search engine is located at the top right corner of every web page on and looks like this:

Advanced Search

Exact Phrase
Any Word

To search the Support Center Click Here


What are the links to "Resources", "Tools" and "Highlights" at the top of every page for?

These act as "quick links" to menus for specialty sections and resources available to you on You can navigate the entire site with this tool bar located at the top of every page.


How do I find a stack testing firm?

Visit the Stack Testing Firm Directory Click Here
For assistance using the features and services on the Stack Testing Firm Directory Click Here


How do I find related services & products?

Visit the Services & Products Directory Click Here
For assistance using the features and services on the Services & Products Directory Click Here


Does have a Site Map?

YES. You can use the Site Map Click Here    Or use the Visitor's Guide Click Here


What are the FEE BASED services?

The FEE BASED services include Listings, Profiles, Classified Ads, Select RFP, Illustrated Test Methods or any other service you have paid a fee to use on
Click Here


Are there any FREE services available on

YES. There are many FREE services available to visitors. Get listed on the Air PErmit PEople page, apply for a National Website Award, submit a New Products / Press Release or Guest Article to "SET News!" or post a question on the SET Wire! bulletin board system. To see all the free services available on Click Here


Can I subscribe to the newsletter for free?

YES. Subscriptions to "SET News!" are free or you can access each issue online by browsing through the archives. Stay on top of the latest stack testing services, new products, featured firms, events and tips with's unique newsletter.

To subscribe Click Here
To browse the Archives Click Here
For this month's edition of "SET News!" Click Here


Can I trade links with

YES - Absolutely. We even provide a special selection of images to use as a link to on your website.
For details Click Here

Or submit your website to for a National Website Award.

Proudly display the linked image of the Award you won on your company's website. Let us know when the linked award image is in place and we will give you a free link on the Award Winners page.
To apply for a website award Click Here


Can I use the photos on the Photo Gallery?

Until we streamline the Photo Gallery permission request procedure we must deny use of the photos to protect their copyrights. We look forward to having this procedure finalized and presented online in the Photo Gallery at a later date.

To see the Stack Tester Photo Gallery Click Here


Can I offer ideas or suggestions for improving

YES. welcomes all ideas and comments for improving the quality of our website. And m
any suggestions from visitors are often incorporated into new departments. If you have an idea or comment for improving
Click Here


If you have a question that was not answered here . . .

You'll find Instant Answers to the most common questions about Click Here
For help placing a listing Click Here

Click Here! Receives Top EPA Award
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Priority ServiceCustomer ServiceVisitor Support

About The Support Center
As we provide services to customers in both the United States and abroad, we cannot offer telephone support and
still be able to provide our numerous services at such low prices, and in many instances free. We have
found though that we can help a lot more people in far less time through the online
Support Center than we ever could over the telephone.


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