"This is the final report for Task 2 of DOE contract number DE-AC20-80LC10461 dealing with retrieval and editing of experimental data generated during the Hanna II and III tests of underground coal gasification. The statement of work for Task 2 was as follows: 1) Develop a data filtering program to flag questionable data on hourly files. 2) The data to be filtered are flows, flow pressures, flow temperatures, product gas analyses/heating value, material balance and energy balance data and tar/water data. 3) Suggest criteria for flagging questionable data. Final criteria will be supplied by LETC personnel. 4) Instrument well temperature data will not be edited."