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