TABLE 7 STRONTIUM 90 IN NEW YORK CITY TAP WATER Sampling Period sr70 pro/l sr°9 1958 January 0.20 2% 0.03 -- February 0620 2 0.05 -- March 0.027 £ 0.004 -- April 0.028 2 0.018 -- May 0.04 2 0.03 ~- June 0.38 2% 0.06 = July 0009 2 0.01 o- August Oly 2% 0.02 -- September 0.128 2 0.004 5 October 0005 4 November 0.066 @ 0.002 2 0,01 December - 54 - 5