The Minnesota Pollution Control Agency (Minnesota PCA) revised and released new geosynthetic liner guidelines for stormwater management in August.
The guidelines specify where liners are required and where liners are recommended, liner specifications (e.g., HDPE, GCL, PVC), and how to select an appropriate liner.
“Liners are designed to limit infiltration of water from a stormwater best management practice (BMP) into underlying and adjacent soil,” the Minnesota PCA said on the updated website.
In addition, the webpage provides links to related guidelines in Wisconsin; Washington, D.C.; Washington state; Virginia; Texas; and Seattle. Links to the Minnesota PCA guidelines for HDPE and PVC liners in general are also available.
To view the Minnesota PCA guidelines, click here.