Table 3. Concentration of NH3-N in surface water at Pocosin Lakes National Wildlife Refuge - Washington Co., NC.
( L. E. Hinesley and A. M. Wicker, 2002)
Sampling Date
Site1 10/24/95 12/19/95 04/18/96 07/10/96 10/02/96 12/12/96 05/07/97 07/15/97 09/16/97 12/09/97 03/11/98 06/29/98 09/29/98 12/09/98 04/13/99 06/30/99 12/07/99 04/06/00 06/28/00 09/27/00
Content (mg/liter)
S0 --- --- --- --- --- --- 0.15 --- 0.15 0.17 0.00 0.013 0.036 0.17 0.09 0.22 0.2 --- 0.06 0.15
S1 0.29 0.15 --- 0.37 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
S2 0.29 0.09 0.04 0.49 0.14 0.15 0.09 0.02 0.11 0.11 0.002 0.031 0.016 0.13 0.03 0.31 0.23 --- 0.06 0.02
S3 0.29 0.12 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
S4 0.29 0.15 0.03 0.84 --- --- --- --- --- --- 0.00 --- --- --- .02 .38 .16 --- .02 ---
S5 0.27 0.14 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
S6 0.27 0.11 0.04 0.73 0.19 0.1 0.05 0.02 0.10 0.03 0.00 0.141 0 0.14 0.025 0.41 0.15 --- 0.08 0
S7 --- 0.16 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
S8 --- 0.14 0.07 0.39 0.20 --- 0.01 0.00 0.03 0.05 0.00 0.054 0 0.12 0.01 0.48 0.15 --- 0.03 0
S9 0.03 0.01 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
S10 0.04 0.01 0.04 0.95 0.20 --- --- 0.00 0.13 0.01 0.00 0.015 --- 0.21 --- --- --- --- --- 0
S11 0.05 0.02 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
S12 --- 0.02 0.10 1.43 0.23 --- 0.07 0.00 0.12 0.01 0.00 0.033 0.077 0.22 0 0.48 0.13 --- 0.02 0
S20 --- --- --- --- --- --- 0.14 --- --- --- --- --- --- --- --- --- --- --- --- ---
mean 0.20 0.09 0.05 0.74 0.19 0.13 0.08 0.01 0.11 0.06 0.00 0.05 0.03 0.17 0.03 0.38 0.17 --- 0.05 0.03
1 Locaton: bounded by County Line Rd (south), Boerma Rd (west), and Clayton Rd (east).
On most dates, values for sites 2 and 6 were averages for duplicate samples.

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