Petroleum / Hazardous Liquids Storage Tanks Resources for Owners and Operators

​The Bureau of Weights and Measures has developed reference guides and compiled the following resources to help tank system owners/operators and Tank Specialty Firms understand and comply with the requirements of Wisconsin Administrative Code ATCP 93.

Compliance Calendar for Gasoline Disp​ensing Facilities

The Wisconsin Department of Natural Resources (DNR) is home to Wisconsin's Small Business Environmental Assistance Program (SBEAP). SBEAP has a variety of tools and resources to help owners and operators of gasoline dispensing facilities understand the environmental regulations affecting their sector. DATCP works with the SBEAP to create one of their most popular tools, the Compliance Calendar for Gasoline Dispensing Facilities. This calendar is published and mailed to gasoline dispensing facilities every other year. To request a hard copy of the most recent calendar, please call the SBEAP at (885) 889-3021. Hard copies are limited, but the calendar and associated documents can be found on the DNR's website at the following links: 

2023-2024 Compliance Calendar for Gasoline Dispensing Facilities

Secondary Containment Information​​

DATCP began enforcing the following secondary containment requirements of Wisconsin Administrative Code ATCP 93 beginning January 1, 2022:

  • ATCP 93.500(5)(d) - All existing pipe connections at the top of the tank and beneath all freestanding pumps and dispensers that routinely contain product shall be placed within secondary containment sumps by January 1, 2021. (note: this deadline was extended to January 1, 2022)
  • ATCP 93.500(5)(f)(1) - Secondary containment sumps provided under this subsection shall have non-discriminating electronic sensors to detect liquids located in the lowest collection point of the sump, unless approved otherwise by the department.​

Product Inventory Verification for Retail Fu​​eling Facilities

Retail fueling facilities with underground storage tanks from which fuel products are offered for sale to the public are required to reconcile product inventory for each tank on a monthly basis for the life of the tank system. Inventory must be verified in order to ensure there has not been a failure of leak detection equipment or a misdelivery into the system. The process for reconciling blender systems differs from how th​e inventory on a single tank is reconciled. 

Instructions for performing inventory record keeping for a non-blender systems

Instructions for performing inventory record keeping with ​blender systems

E15: Information for Retailers and Service Comp​​​anies

Please visit our E15 web​page for forms, fact sheets, and helpful links developed by the Bureau of Weights and measures to assist retailers and service companies with information regarding E15.​

Retail Fueling Facility Co​mpliance Training for Owners and Operators

The Bureau of Weights and Measures has developed the following compliance guide to assist the owners and operators of retail fueling facilities understand the regulatory requirements.  

Additionally, since 2017, Weights and Measures has conducted annual training sessions throughout the state with the goal of increasing compliance and owner/operator understanding of the regulations that impact their business. The following are the training materials from the 2023 sessions.  


Fact ​​Sheets/FAQs

Please visit our fact sheet page to see all of our FAQs and fact sheets for owners and operators.​