{HEAD ~ Gas} is delivered by a small compressor, blower or fan through {TAIL ~ the piping} as shown, from a source which may be an on site waste stream or the like 
is delivered through
{ HEAD ~ Gas } is delivered by a small compressor , blower or fan through { TAIL ~ the piping } as shown , from a source which may be an on site waste stream or the like
HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH