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**Alternatively, a manufactured cushion fabric (geotextile) can be employed for this purpose.
**Alternatively, a manufactured cushion fabric (geotextile) can be employed for this purpose.
**The top surface of the membrane must also be protected from stone and gravel being used for inside the BMP. Again, sand or a cushion fabric may be used.
**The top surface of the membrane must also be protected from stone and gravel being used for inside the BMP. Again, sand or a cushion fabric may be used.
−*When a pipe is used to provide drainage from the practice to a storm sewer, a 'pipe boot' or flange should be sealed to both the pipe and the liner to prevent leaks.
+*When a pipe is used to provide drainage from the practice to an outlet structure or storm sewer, a 'pipe boot' or flange should be sealed to both the pipe and the liner to prevent leaks.
[[Category:Materials]]
[[Category:Materials]]