A two year study of norm levels in the facilities of a major Malaysian oil and gas exploration and production company

Four comprehensive surveys of offshore and onshore facilities of a major Malaysian Oil and Gas E and P Company have been completed in the two year period since March 1993. Data include measurements of external gamma dose rate, space contamination, Rn and In progeny levels, particulate radioactivity in ambient air and radium in liquid effluent and sludge. Monitored quantities have yielded values which are for the most part in accord with those of undisturbed environments although limited occurrence of elevation of dose rate, and of radium concentration in sludge have been observed. In the latter instance measured concentrations of 226Ra and 228Ac have been within values of less than 1 Bq g-1, being in general very much less than this. Comparison with reported oil and gas facility NORM levels in other parts of the world indicate present levels to be relatively low. (author)