This is despite the extra cost associated with injecting large quantities of {HEAD ~ fresh water} instead of {TAIL ~ brine} 
This is despite the extra cost associated with injecting large quantities of { HEAD ~ fresh water } instead of { TAIL ~ brine }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL