ey wis” Ho Calculations and Reports? e@ preliminary@calculations follow the form recorded on the data sheets. (The final extrapolation will be performed at NYO after sufficient decay rate data has been collected. Precipitation and settled dust samples are reported as a/m/ft per 24 hours. Airborne dust samples are reported as a/m per’ cubic meter, using the average of the initial and final sampling rates. Summary sheets are provided for tabulating the data from each site. One sheet should be used for the sampies at a single site counted during a week, and the collected summaries sent to NYO at the end of the week. The mailing address iss Mr. Hanson Blatz U. S. Atomic Energy Commission FP. 0. Box 30, Ansonia Station New York 23, New York Sufficient summary sheets will be provided so that the cooperating laboratories may keep a carbon copy if they wish. Extra data sheets will also be provided for recording the second count on samples that require it. The individual data sheets should be sent to NYO, either weekly or at the end of the test. I. Generals It is realized that the procedure described is crude, but refinement is impossible if a large number of samples are to be handled economically. Therefore, it is important that the techniques be standardized. The factors of self-absorption by the ash and the variation in beta energies are ignored, All results, however, will be corrected at NYO for radioactive decay. For this purpose, any decay curves which the cooperating laboratories can supply will be extremely useful. It is also planned to determine the variation in aluminum absorption data with age of the sample. Any absorption curves which cooperating laboratories can supply will be appreciated.