LEGEND Location Type of location and section of town. Spect. Total terrestrial dose rate as A Total terrestrial dose rate obtained from high pressure ionization chamber. Port. Inst. Total terrestrial dese rate inferred from portable BeVe Best value of total terrestrial dose rate as K,U,T Dose rate contributicrs from potassium-40 and the uranium-238 and thorium-232 series, respectively. ToT Total natural dose rate. Zr Dose rate contribution from zirconium-95 and ph06 Fo(1) “energy” inferred from in spectrem. scintillation counter readings. discussed on page 3. niobium-95, Dose rate contribution from rhodium-106. Sum of zirconium-nicbium-95 and rhodium-106 dose rates, rol?) The difference between 5.V. Le Cosmic ray dose rate contribution. gamma dose rate (TOT). - 16 - and the total natural