Tier II

Contact: Rick Lopez 307-777-4906 rick.lopez@wyo.gov


The Wyoming SERC has contracted with Aristatek to process TIER II reports. Wyoming does not charge a filing fee.

The TIER II Submit portal is: https://wyo.tieriiportal.aristatek.com. You only need to make one submittal to this link and Aristatek will distribute to the required parties.

For assistance using the TIER II portal, contact AristaTek technical support at at: 877-912-2200 option #2 or support@aristatek.com.


Tier II Information Requests

Tier II reporting requires reports be submitted for specific facilities and that each specific facility be identified by name and physical address; therefore, pursuant to 40 CFR370.30(c), a request for Tier II information must likewise identify a specific facility.

"Facility" is defined in 40 CFR370.2 as "all buildings, equipment, structure, and other stationary items that are located on a single site or on contiguous or adjacent sites and which are owned or operated by the same person . . . [and] shall include manmade structures as well as all natural structures in which chemicals are purposefully placed or removed through human means such that it functions as a containment structure for human use."

Tier II information is not tracked by the name of the owners or operators of the facilities subject to reporting requirements of 40 CFR370.20 and the Wyoming Office of Homeland Security (WOHS) is unable to honor requests for Tier II information for all facilities reported under the name of a particular owner or operator.


When requesting Tier II information a requisite statement of need must accompany the request.

WOHS, on behalf of the State Emergency Response Commission (SERC), will fulfill requests for Tier II information for a specific facility with the most current information reported for that facility. Tier II information is typically retained by WOHS for one calendar year or until more current Tier II information for a specific facility is submitted (the federal regulations set the reporting period for Tier II information as January 1 to December 31).

Pursuant to 40 CFR370.30(b), the provision of Tier II information that is not in the commission's possession (such as obsolete Tier II information from prior reporting periods) will be requested from the owner or operator of the specific facility by SERC if the request for such information included the requisite statement of need.

To request Tier II information contact Kelly Ruiz at kelly.ruiz@wyo.gov.

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