Is Your Shared Industrial Site Covered Correctly?

Industrial facilities are often more complex than they appear on paper. A single property may include multiple operations, tenants, business units, maintenance shops, storage areas, or contractors operating side by side. These shared industrial sites can create hidden stormwater permit risks that are easy to miss until an inspection or renewal brings them to light.

How Co-Located Operations Create Compliance Risk

Under the Texas Multi-Sector General Permit (TXR050000), co-located industrial activities may require additional permit considerations. Depending on how your site is organized, multiple regulated sectors, multiple operators, or shared drainage systems may affect permit coverage, SWP3 requirements, monitoring obligations, and compliance responsibilities.

Questions Every Shared Site Should Ask

• Does your SWP3 address every regulated industrial activity occurring on the property?
• Are all operators who require permit coverage properly authorized?
• Are shared areas such as loading docks, storage yards, drainage ditches, and outfalls assigned to the appropriate responsible party?
• Do your site maps accurately depict tenant boundaries, drainage patterns, industrial activities, and discharge points?
• Have changes in operations, SIC/NAICS codes, outdoor material storage, or tenant occupancy been incorporated into your stormwater program?

Periodic Evaluation Checklist

Facilities with multiple operators or co-located industrial activities should periodically evaluate whether:

• All regulated industrial activities have been identified.
• Permit coverage remains appropriate for each operator.
• The SWP3 addresses all applicable industrial sectors and shared areas.
• Responsibilities for inspections, monitoring, housekeeping, spill response, corrective actions, and recordkeeping are clearly assigned.
• Outfalls, drainage areas, and benchmark monitoring requirements remain accurate.

Where These Issues Commonly Occur

These issues are commonly encountered at industrial parks, manufacturing campuses, distribution centers, leased facilities, terminals, warehouses with outdoor storage, and other sites where multiple businesses operate on a shared property.

Renewal Timing Makes This the Right Time to Review

With the renewal of the Texas Multi-Sector General Permit underway, now is an ideal time to review your stormwater program before an inspection, permit renewal, or stormwater event identifies gaps in compliance.

How EDGE Engineering and Science Can Help

EDGE Engineering and Science assists facilities with:

Please contact us if you would like help evaluating whether your facility’s current stormwater program accurately reflects the activities, operators, and drainage conditions at your site.