Treated stormwater passes through the underdrain pipe, through an underdrain pipe opening in the sidewall or bottom to a storm drain or sewer system or {HEAD ~ other type} of discharge system or {TAIL ~ method} 
Treated stormwater passes through the underdrain pipe , through an underdrain pipe opening in the sidewall or bottom to a storm drain or sewer system or { HEAD ~ other type } of discharge system or { TAIL ~ method }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL