As waste containers are brought to the waste disposal site, they are placed upon {HEAD ~ the geometrically indexing support structure} 22 in a known order and {TAIL ~ array} 
As waste containers are brought to the waste disposal site , they are placed upon { HEAD ~ the geometrically indexing support structure } 22 in a known order and { TAIL ~ array }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL