A check valve system 2 and further comprising an accumulator operably positioned within {HEAD ~ said second duct} between said second fuel source of said fugitive gases and said {TAIL ~ engine} 
between
A check valve system 2 and further comprising an accumulator operably positioned within { HEAD ~ said second duct } between said second fuel source of said fugitive gases and said { TAIL ~ engine }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL