Site G = SS8E Regression Modeling for 30-Day Antecedent Total Ammonia for Bio-Assessment Events
Summer Season for Salt Creek ISG = SS8E (Below North 84th Street) Winter Season for Salt Creek ISG = SS8E (Below North 84th Street)
(Regression Used Based on 24-Hour Averages, Where Y' = 0.115(X1) + 0..036(X2) - 0.059(X3) - 0.180(X4) -0.134(X5) + 9.74 (See IS2-ISG Ammonia Tab) (Regression Used Based on 24-Hour Averages, Where Y' = 0.115(X1) + 0..036(X2) - 0.059(X3) - 0.180(X4) -0.134(X5) + 9.74 (See IS2-ISG Ammonia Tab)
                          USGS        
      USGS USGS               USGS N. 70th St.        
    Theresa N. 27th St. N. 70th St. NETP NETP ISG       Theresa N. 27th St. 24-Hour NETP NETP ISG  
    Composite Average Average Composite Average Predicted       Composite Average Average Composite Average Predicted  
Bio-Assessment 30-Day T. NH3N Flow Flow T. NH3N Flow T. NH3N   Bio-Assessment 30-Day T. NH3N Flow Flow T. NH3N Flow T. NH3N  
Starting Antecedent (mg/l) [1] (cfs) (cfs) (mg/l) [1] (cfs) (mg/l)   Starting Antecedent (mg/l) [1] (cfs) (cfs) (mg/l) [1] (cfs) (mg/l)  
Dates Dates (X1) (X2) (X3) (X4) (X5) (Y') Comments Dates Dates (X1) (X2) (X3) (X4) (X5) (Y') Comments
08/29/94               No 30-day antecedent composite ammonia data available 12/19/94 11/22/94 10.10 160 173 10.10 7.6 3.56 Only 7-day effluent composite data available for NETP;
                    11/29/94 6.20 139 132 11.20 7.8 4.56 therefore the counterpart effluent data was used for
08/21/95 07/25/95 0.94 101 102 13.24 12.7 3.34 Only 7-day effluent composite data available for NETP;   12/06/94 6.72 121 119 19.04 7.4 3.38 the Theresa St. effluent, and the flow data was also
  08/01/95 2.24 113 125 14.56 8.4 2.90 therefore the counterpart effluent data was used for   12/13/94 6.70 127 125 15.70 7.7 3.80 normalized to 7-day averages.
  08/08/95 2.80 102 135 16.24 8.5 1.67 the Theresa St. effluent, and the flow data was also   Averages 7.43 137 137 14.0 7.6 3.83  
  08/15/95 4.40 102 119 13.44 8.9 3.25 normalized to 7-day averages. 02/20/95 01/24/95 7.30 94 107 15.10 7.9 3.84 Only 7-day effluent composite data available for NETP;
  Averages 2.59 105 120 14.4 9.6 2.79     01/31/95 6.72 91 110 19.04 7.8 2.79 therefore the counterpart effluent data was used for
09/13/96 08/20/96 6.79 320 337 4.38 2.9 0.85 Only 7-day effluent composite data available for NETP;   02/07/95 10.92 196 191 19.88 7.3 2.15 the Theresa St. effluent, and the flow data was also
  08/27/96 12.15 288 317 4.77 3.5 1.36 therefore the counterpart effluent data was used for   02/14/95 6.20 146 160 18.50 7.7 1.85 normalized to 7-day averages.
  09/03/96 10.69 288 332 1.79 3.8 0.80 the Theresa St. effluent, and the flow data was also   Averages 7.78 132 142 18.1 7.7 2.66  
  09/10/96 11.03 217 234 0.31 3.7 4.38 normalized to 7-day averages. 03/04/96 02/06/96 14.28 132 170 18.93 8.1 1.57 Only 7-day effluent composite data available for NETP;
  Averages 10.17 278 305 2.8 3.5 1.85     02/13/96 10.11 334 368 21.13 7.6 ND therefore the counterpart effluent data was used for
08/29/97 08/05/97 3.69 129 149 16.39 8.7 1.85 Only 7-day effluent composite data available for NETP;   02/20/96 10.95 251 251 20.85 7.8 0.33 the Theresa St. effluent, and the flow data was also
  08/12/97 2.93 111 120 23.78 8.9 1.48 therefore the counterpart effluent data was used for   02/27/96 17.82 205 215 22.01 7.5 1.44 normalized to 7-day averages.
  08/19/97 5.47 107 114 17.10 9.0 3.17 the Theresa St. effluent, and the flow data was also   Averages 13.29 231 251 20.7 7.8 1.11  
  08/26/97 4.29 75 80 6.88 9.0 5.74 normalized to 7-day averages. 03/05/97 02/04/97 7.24 292 266 18.22 8.6 0.85 Only 7-day effluent composite data available for NETP;
  Averages 4.10 106 116 16.0 8.9 3.06     02/11/97 6.25 295 267 20.32 8.6 0.40 therefore the counterpart effluent data was used for
08/16/98 07/21/98 8.63 223 225 9.06 4.3 3.19 Only 7-day effluent composite data available for NETP;   02/18/97 6.05 209 202 22.35 8.7 0.77 the Theresa St. effluent, and the flow data was also
  07/28/98 5.30 270 282 8.66 4.6 1.15 therefore the counterpart effluent data was used for   02/25/97 6.97 213 220 15.06 8.5 1.30 normalized to 7-day averages.
  08/04/98 7.23 260 263 10.03 4.3 1.93 the Theresa St. effluent, and the flow data was also   Averages 6.62 252 239 19.0 8.6 0.83  
  08/11/98 5.80 172 171 9.79 4.1 4.13 normalized to 7-day averages. 02/01/99 01/02/99 6.34 124 163 10.22 11.3 1.91 NETP and Theresa St. effluent data consists of 24-hour
  Averages 6.74 231 235 9.4 4.3 2.60     01/03/99 5.95 125 286 11.57 11.4 ND composites, and all flow data are also 24-hour averages.
08/24/99 07/25/99 3.44   229 1.55 10.5 ND NETP and Theresa St. effluent data consists of 24-hour   01/04/99 12.67 122 343 9.63 12.1 ND  
  07/26/99 14.40 198 217 1.69 11.0 3.87 composites, and all flow data are also 24-hour averages.   01/05/99 16.18 126 326 8.34 9.6 ND  
  07/27/99 21.11 193 207 2.10 10.9 5.00     01/06/99 14.34 136 208 8.18 9.8 1.18  
  07/28/99 16.04 187 196 1.96 10.6 4.91     01/07/99 12.52 136 173 7.80 10.3 3.03  
  07/29/99 16.26 177 186 1.26 10.4 5.32     01/08/99 12.09 137 160 7.76 9.8 3.86  
  07/30/99 20.15 167 178 1.92 10.5 5.75     01/09/99 10.97 136 159 5.63 9.4 4.18  
  07/31/99 13.75 205 220 1.94 10.1 3.93     01/10/99 6.76 134 159 5.88 9.9 3.52  
  08/01/99 9.01 167 176 1.35 9.2 4.86     01/11/99 13.17 139 165 7.97 10.1 3.68  
  08/02/99 16.49 168 173 2.33 9.7 5.69     01/12/99 21.30 147 171 10.21 8.6 4.35  
  08/03/99 18.96 195 197 1.67 9.7 5.64     01/13/99 18.87 140 164 7.80 9.9 4.50  
  08/04/99 17.17 164 178 1.48 9.8 5.48     01/14/99 16.05 134 157 7.16 9.8 4.50  
  08/05/99 15.72 153 165 0.39 9.6 5.90     01/15/99 17.52 147 165 6.72 9.6 4.77  
  08/06/99 15.76 255 282 0.46 9.9 2.58     01/16/99 8.55 165 177 7.14 9.9 3.55  
  08/07/99 12.70 238 265 0.32 9.5 2.71     01/17/99 8.68 166 174 6.38 9.0 4.04  
  08/08/99 12.53 194 204 0.85 8.9 4.70     01/18/99 9.23 169 176 6.74 9.7 3.92  
  08/09/99 17.99 177 185 1.71 9.6 5.61     01/19/99 18.53 166 174 7.04 9.5 4.98  
  08/10/99 22.18 169 175 1.33 9.5 6.48     01/20/99 22.49 160 170 8.44 9.4 5.22  
  08/11/99 19.70 293 352 1.20 9.8 0.14     01/21/99 23.01 158 169 9.97 9.4 4.99  
  08/12/99 20.13 285 332 1.64 9.6 1.04     01/22/99 21.87 182 188 8.88 9.6 4.77  
  08/13/99 22.40 214 229 0.71 9.2 5.06     01/23/99 15.65 163 178 8.18 9.4 4.12  
  08/14/99 16.68 189 195 0.67 8.6 5.61     01/24/99 10.97 154 172 7.23 8.5 3.90  
  08/15/99 9.25 177 182 0.04 9.4 5.10     01/25/99 13.69 142 165 8.45 10.2 3.75  
  08/16/99 15.12 172 177 1.03 10.8 5.54     01/26/99 19.38 143 167 10.31 11.0 3.89  
  08/17/99 17.85 168 174 1.49 9.2 6.01     01/27/99 18.80 154 174 13.05 10.9 3.31  
  08/18/99 13.99 632 671 1.06 10.2 ND     01/28/99 20.93 149 173 9.44 10.9 4.10  
  08/19/99 16.11 239 252 0.99 9.5 3.78     01/29/99 19.05 142 166 8.80 11.1 4.13  
  08/20/99 18.79 189 201 1.09 9.1 5.36     01/30/99 13.97 148 166 8.71 10.4 3.87  
  08/21/99 11.38 173 185 2.78 8.9 4.60     01/31/99 10.29 143 163 9.72 10.6 3.24  
  08/22/99 8.22 164 175 1.68 8.5 4.76     Averages 14.66 146 185 8.4 10.0 3.90  
  08/23/99 13.64 161 170 2.80 9.1 5.29  
  Averages 15.56 209 224 1.4 9.7 4.67