These collected fugitive gases are fed into ducting 131 extending to a diverter valve 112 which, in a first configuration, passes the fugitive emissions to the normal vent or stack 113 to bypass {TAIL ~ the engine} 101 and which, in a second configuration, pass the gases to {HEAD ~ a flow meter} 114 and thence to the air intake 120 of the engine 101 
These collected fugitive gases are fed into ducting 131 extending to a diverter valve 112 which , in a first configuration , passes the fugitive emissions to the normal vent or stack 113 to bypass { TAIL ~ the engine } 101 and which , in a second configuration , pass the gases to { HEAD ~ a flow meter } 114 and thence to the air intake 120 of the engine 101
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