[en] This report is a continuation of an earlier report on the interaction of borosilicate glass, Umtanum basalt and Grande Ronde groundwater at 300 degree C and 300 bars (Clemens et al., 1982). Here we present the results of a similar set of experiments at 200 degree C and 300 bars. The results bear upon the efficacy of borosilicate glass as a stable wasteform in the context of the US Department of Energy, Hanford Site. We are able to compare borosilicate glass behavior at 200 degree C and 300 degree C and contrast the behavior of this wasteform with that of supercalcine under similar conditions (Jenkins et al., 1982). The experiments also allow us to assess the effect of the presence or absence of basalt in the system. 7 refs., 16 figs., 8 tabs