_ Ss Ss tee TNS ass, » > ~~ Se « _ ARON . ~ - wa AE . < a vs i x » ne ‘SS » as wo eg . ws tee RS © wage} MAS so NEW YORK CITY MONITORING PROGRAM Pot Sampling A high-walled stainless steel pot the roof of HASL for fallout sampling. is maintained on The results of weekly collections are given tn Table 6 and the cumulative curve is shown in Fig. 5, lt was found that agreement between duplicate pots is not good, This is mostly caused by the low ectivity levels. Such deviations are expected to be reduced by exposure for one month periods ment. and by counting on iower background equip The latter is shown partially by the data after 9/24/56, but further improvement will equipment will be possible as more counting allow longer counting times, Tap Water New York City August 1954, are given tap water has been analyzed since The results obtained since issuance of NYO-475I in Table 7, The weighted average value for six months period is O.19 pyc/liter. - 929 - the .