{HEAD ~ The top} may include a slab of water impermeable material having a substantially central opening through which plant material grows, as well as {TAIL ~ an inlet opening} for receiving stormwater to be treated 
include
{ HEAD ~ The top } may include a slab of water impermeable material having a substantially central opening through which plant material grows , as well as { TAIL ~ an inlet opening } for receiving stormwater to be treated
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH