{TAIL ~ The water} used to make up the alkaline solution can either be supplied from an external source or in part or in total from {HEAD ~ water} produced with the oil 
{ TAIL ~ The water } used to make up the alkaline solution can either be supplied from an external source or in part or in total from { HEAD ~ water } produced with the oil
TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH