DASA 2019-2 368 WARREN: EISENBUD: Yes, How many do you have, do you know?’ WARREN: [think there are seven in Los Angeles with pretty wide coverage; [dan't know the number, but it's comparable in San Francrsco; and Oakland ana “cereeley [th >‘ have some. 3 Now, of course, the big radiological iaboratories allhave background counts daily, so that they would be able to give a quick count. There are maryin industries (like North American where, during the episode with the Nevada fallout the background of their instruments rose vhen ptople tracked it in from the parking lot). EISENDUD. Yes, Cf course, these instruments would be tctally . j ineffective ina high level situation, Staff, WARREN. idea, Yes, but they would get an alert. They would get some EISENKHUD: Yes. One of the critical things, in contrast to what we have all experienced where a bomb goes off a hundred miles away ard you get a fairly uniform level of fallout, is that in an attack situation the gradients would be very steep. We have seen on the board here that the gradient between the northern Rongelap [slands and the lower islands. which were only 30 miles away, was what, a factor of ten? : CONARD: Yes from 150 to 2300 rads. EISENBUD: More thanten. So, you see, for decision-making purposes a man needs better information than you can get ow of relatively few instruments, On the study we made in the metropolitan area, we included something like a hundred automatic stations (I don't remember the exact number we decided we needed), and the cost of this was just prohibitive in terms of what people were willing to provide in those days, and ‘for that matter still are, DUNHAM: Of course, if you had planes you could do aerial surveys which would be quite helpful, . EISENBUD: . : We looked into that, : too, Chuck, and concluded, largely based on the experience that we had developedin the later tests out in Castle, Bite: setaeatne,4be eit that the planes would become so contaminated that they couldn't we tee as be es Pastel OS ar rialthouLetsOLBEileaec cle Heeelek caee i CeeleclaOOaleae anleReelaareiene He