1179 laboratory procedure. But now we can do the same thing with instruments that are stationary. * CURRENT METHONG OF MONITORING _ Mr. Dexcay. the x at about the measurement of the Jevel« of cesium ; s that increasing in soplisticavion so af your measures can detect levels that were previously undetectable! Let me answer tha: a little differently. Several vears ago no one would have thought you could take a whole body counter into the field. Now it is engineered to be taken out into thefield. Mr. Dexcax. You did early in 1975. But your first whole body count nin— tr. r. McCraw. "74. aTEs. is that when you first detected the increase! Mr. McC Thatis the first measurement of cesium in people. We b icted what the levels would be. ann Dexcax. Were your measurements in accordance with the prection f 1. Me .)es. All of the surveys that we have done have tended to support the earlier findings. We have gotten « better body of data and more confidence in the radiation doses we are predicting. and we are looking s* the actual items of the diet and do not have to rely on estimates of radioactivity in the foods that the people are eating. Mr. Drxcax. But your whole body counts in 74 were not alarming. It wasn't until vou went beck in “¢5 with your major resurveythat you c. . In 1975 higher d doses on the he bas:basis 97 we began to redict ict higher “SeMets of samples we had collected. In 1977 when the second whole body count was done the levels were a factor of ten higher than in 1974. PEDERAL 6TANDARDES AND CURRENT BIKIX] LEVELS Mr. Yates. Above the Federa] sandards! AMMcCraw. If I might explain about the standards. There aretwo pumbers. is for the ] population. The otheris for an individual where you know the individual's exposure. We have not exceeded that individual] number. We have seen levels approaching this lower number for the general ulation. We feel that we can use the higher number or the standard because we are actually measuring the levels of radioactivity in individuals in the population. We know the distri: bution. We know the highs and we know the lows. Mr. Yarzs. Who is to sar that the Federa! standards are accurate’. Hox do you mow theFederal standards are acceptable! edon r. Yarzs. Why do you establish standards and asy if you come to “be wendard -verything is fine, and if you above this standard itis ..< ane How co you know theFedera! standards are not carcinogenic! vir, Drar I think in the redistion protection field that we are conce we have another philosophy which is the lowex practicable solution to a problem and it is believed that the people who work with radiation wil] not receive-— DOE ARCHIVES