Industrial Stormwater Permit Guide

Your link to federal and state compliance resources

Process Water Storage (Wash Water): Stormwater Compliance Photo Comparison

Compliant Condition

Compliant Process Water Storage
Wash Water Pit at a concrete facility
This is an example of retention structure that is properly maintained. The water is held here until the water is recycled back into the concrete mixing activities.

Compliant Process Water Storage
Compliant settling basin for concrete batch plant
This is an example of a settling basin for stormwater and wash water to be stored and the suspended solids settled out of the water prior to being reused.

Compliant Process Water Storage
Compliant concrete batch plant settling pond system
This is a view of the second, third, and fourth settling ponds in the truck washout area. Rinse water is recycled from the fourth pond in the series (at the left side of the photo).

Compliant Process Water Storage
Compliant batch plant settling pond system
Storm water and site waste water flowing from the eastern portions of the site, are directed to this southeastern settling pond.

Photos courtesy of Tetra Tech, Inc.

Non-Compliant Condition

Non-Compliant Process Water Storage
Wash Water Pit at a Concrete Batch Plant
Non-compliant retention pond containing concrete washout water that was leaking into the environment. The structure should be properly maintained so that water containing concrete aggregates and other suspended solids do not enter the water system.

Photo courtesy of Tetra Tech, Inc.