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  • About The FREE Services On
    The numerous free services & resources available to visitors creates a unique system for a worldwide audience of air quality professionals to network together. To see the free services offers Click Here

    To use a specialty service (Classified Ads, Select RFP, Site Sponsorship) or to be listed on the Directories or other specialty sections, companies serving the air pollution testing and control industry have purchased a FEE BASED listing or service. To order a listing Click Here

  • Can I use the reference tools and resources on this site for free?
    YES. Visitors who regularly use the Directories and reference sections on have enjoyed unlimited, free access with no membership fees nor registration requirements since the site was first published to the Internet August 2000.

  • Can I request updates to a FREE service I am using on at no cost?
    There are no costs for visitors to request updates to a FREE service.
    To request updates to a FREE service you are using on Click Here

  • Can I send my update request to by e-mail?
    No. For security purposes, requests for updates submitted to by e-mail cannot be processed. To request updates securely please select an option below for the type of service you need:

    Visitor Support
    To request updates to any FREE service including SET News! Guest Articles, Press Releases, Website Awards, or any other service for which you you have not paid a fee to use Click Here

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    To request updates to
    your FEE BASED listing or service Click Here
    You are entitled to receive priority service if you have purchased an Listing Option

    Requests for updates submitted to by e-mail cannot be processed.

  • How do I place a listing on the Directories? Click Here

  • Can I trade links with
    YES. To trade links with Click Here

  • Can I offer my suggestions or ideas?
    YES. Many suggestions from visitors are often incorporated into new departments on If you have an idea or comment for improving Click Here

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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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