TABLE 10 sr9° IN NEW YORK CITY TAP WATER Sr’? Sampling Period ape/L Jemary 1957 0.18 & O01 March 1957 0.26 J 0.00 April 1957 0018 2% 0.002 May 1957 0.007 2 00004 June 1957 0016 2 0.01 July 1957 0.235 2 0.012 ‘August 1957 Oo272 2 0.087 September 1957 00115 2 0.008 Oatater 1957 60051 2 0.004 Hovenber 1957 02082 2 02006 December 1957 0.058 2 0.004 January 1958 0.20 2 0.03 February 1958 Oo.20 + 0.05 March 1958 0.027 7 0.00k April 19568 0.028 I 0.018 -72°0