John B. McHugh 1979 The pressing need for on-site field analyses of the uranium content of surface and ground waters has promoted the development of a simple, light-weight, relatively cheap, portable kit to make such determinations in the field. Forty to sixty water samples per day can be analyzed for uranium to less than 0.2 parts per billion. The kit was tested in the field with excellent results. application/pdf 10.3133/ofr79429 en U.S. Geological Survey, Portable field kit for determining uranium in water reports