During December 6, 7 8 and 9, Western Research Institute performed the first groundwater sampling expedition during coal gasification at the RM-l site. Wells EMW-1, EMW-3, EMW-11a, TW-2, TW-3, TW-11, TW-18 and TW-17 were not sampled due to high pressures at the well head. Well EMW-6 (underburden) was also not sampled due to clay invasion from the under burden formation and the presence of drilling gel in the open interval. This poor quality of groundwater was the result of recent attempts at redeveloping the well to correct for previous caving in the under burden open-interval. Although the redevelopment of the well was thought to have been complete after drillers left the site in November, the presence of clay-rich waters and drilling polymers in the open interval requires further redevelopment. WRI is currently working on a plan to correct EMW-6 for the next 10 day sampling. In addition, wells EMW-8, and EMW-2 were not sampled due to low practicabilities observed for the "lower overburden strata (Unit A), resulting in unacceptably low recovery rates as discovered in the October 1986 sampling outing. A permanent water level monitoring instrument has been installed on well EMW-7 and therefore a sample was not obtained.