INTERIM REPORT OF LFE ANALYTICAL SERVICES FOR NAEG W. J. Major and L. Leventhal LFE Environmental Analysis Laboratory Richmond, California Since the October 1974 meeting of the Nevada Applied Ecology Group, LFE has analyzed several hundred samples for various radioactive elements in a wide Radiochemical and instrumental analysis were performed on range of matrices. such samples as field and greenhouse vegetation, soils, glass fiber and microsorban filters, rodents, bovine and caprine tissues and bone, and desert mammals. Radioisotopes determinations included 238Py, 2397249py, 241am, 210pp, 55Fe, SFe, 9%Sr, 23092327, total and isotopic U, and 226Ra, The data generated was reported routinely to the NAEG for evaluation. A special computer program was developed for data reduction and reporting of bovine and caprine numbers. The program allowed for computing and reporting the sample radioactivity on a wet, dry, and ash weight basis. A complete animal description, weights, ratios, and pertinent radiochemical data were included in the printout. A similar computer program was developed for soils, vegetation, and rodent animals. A special test was performed at the Nevada Applied Ecology Group laboratory at Jackass Flats, to determine the transuranium content of large-size, high-level bovine and caprine tissue samples. The lab had been reconstructed by NAEG and REECo personnel to accommodate analysis of these samples and to confine any contamination to a remote area. In order to avoid spread of contamination and speed up dissolution of the samples, a wet ashing method was developed and employed on spiked samples of large tissues. The method consisted of spiking kilogram samples of liver, muscle, spleen, and bone with 60¢0, analyzing them using the special wet ashing techniques and classical radiochemical methods. Details of a similar procedure are attached. 275