Salt Creek WQ Studies  
2-Hour vs. 4-Hour Total Ammonia Sampling
Conclusion:  4-Hour Sampling will Suffice for All in situ Work (See Graph)
      2-Hr   4-Hour  
Sitecode Date Time Labno NH3 NH3 labno
Theresa Samples            
'IS2_01' 09/17/99 10:00 990917001 15.98    
'IS2_02' 09/17/99 12:00 990917002 15.44 15.48 990917013
'IS2_03' 09/17/99 14:00 990917003 17.10    
'IS2_04' 09/17/99 16:00 990917004 21.20 20.88 990917014
'IS2_05' 09/17/99 18:00 990917005 24.25    
'IS2_06' 09/17/99 20:00 990917006 25.80 25.94 990917015
'IS2_07' 09/17/99 22:00 990917007 25.98    
'IS2_08' 09/18/99 00:00 990917008 25.65 25.59 990917016
'IS2_09' 09/18/99 02:00 990917009 24.82    
'IS2_10' 09/18/99 04:00 990917010 23.99 24.06 990917017
'IS2_11' 09/18/99 06:00 990917011 23.38    
'IS2_12' 09/18/99 08:00 990917012 22.33 22.25 990917018
NETP Samples            
'IS8_01' 09/17/99 10:00 990917019 12.53    
'IS8_02' 09/17/99 12:00 990917020 11.27 11.25 990917031
'IS8_03' 09/17/99 14:00 990917021 11.54    
'IS8_04' 09/17/99 16:00 990917022 15.22 15.09 990917032
'IS8_05' 09/17/99 18:00 990917023 17.94    
'IS8_06' 09/17/99 20:00 990917024 17.27 17.30 990917033
'IS8_07' 09/17/99 22:00 990917025 16.34    
'IS8_08' 09/18/99 00:00 990917026 15.61 15.66 990917034
'IS8_09' 09/18/99 02:00 990917027 15.24    
'IS8_10' 09/18/99 04:00 990917028 14.44 14.61 990917035
'IS8_11' 09/18/99 06:00 990917029 13.79    
'IS8_12' 09/18/99 08:00 990917030 13.23 13.29 990917036