This report presents a summary of the observed effects of the pilot scale BX in-situ oil shale project on the local environment. It also provides an estimate of potential impacts on the environment from a conceptual 10,000 bbl/day commercial scale operation. The BX process uses superheated steam as a heat carrying medium for the in-situ retorting of oil shale in the Green River Formation leached zone. No air quality monitoring was required or conducted. There were no serious impacts to surface or ground water from the research facility. Minimal effects on the fauna and flora were observed. Those occurring resulted from alterations to the stream channel which disturbed the substrate. It is projected that the commercial scale concept may result in significant impacts on air resources as a result of fugitive dusts and hydrocarbons. The potential impacts to water resources resulting from construction and operation of commercial scale facility include increased runoff, sediment loading and water quality degradation to both surface and ground water. However, the present concept of the commercial scale facility would minimize most of the aforementioned impacts. The normal operations of a commercial scale facility pose no harmful impacts to the fauna and flora of Black Sulphur Creek. Impacts could occur, however, from accidental spills or leaks from pipelines or from stream disturbances during construction activities. 49 references, 30 figures, 36 tables. (DMC)