A comprehensive survey of instrunnentation for environmental monitoring is being carried out by the Lawrence Berkeley Laboratory under a grant from the Natioral Science Foundation. Instruments being investigated are those useful for measurements of Air Quality, Water Quality, Radiation, and Biomedical Parameters related to environmental research and monitoring. Consideration is given to instruments and techniques presently in use and to those developed for other purposes but having possible applications to this work. The results of the survey are given as (a) descriptions of the physical and operating characteristics of available instruments, (b) critical comparisons among instrumentation methods, and (c) recommendations of promising methodology and development of new instrumentation. The survey material is compiled in 5 loose- leaf volumes which can be periodically updated. An update for volume 3 on radiation instrumentation is presented. New pages are included for insertion in the introductory material and also under the headings nuclear reactors, combination instruments, alpha particle instrumentation, beta particle instrumentation, x and gamma radiation monitoring instrumentation, gamma spectrometry, neutron monitoring instrumentation, personnel dosimetry, radionuclides (strontium -89 and -90, iodine -129 and -131, radium, uranium, plutonium, and instrument notes), and infrared. (WHK)