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              Final Stage 1 Report
Final Report Page iii August 2007
Table 4-16. Summary Statistics for Atrazine in Mt. Olive Old Lake (Segment IL_RJG). ..................48
Table 4-17. Atrazine Observations in Mt. Olive Old Lake (Segment IL_RJG)...................................48
Table 4-18. Summary Statistics for Chlorophyll-a in the Staunton Lake (Segment IL_RJA).............48
Table 4-19. Summary of total phosphorus parameters in Staunton Lake (Segment IL_RJA). ............50
Table 4-20. Violations of the total phosphorus standard in Staunton Lake (Segment IL_RJA). .........51
Table 4-21. Summary of manganese sampling for Staunton Lake (Segment IL_RJA). ......................55
Table 4-22. Violations of the manganese standard in Staunton Lake (Segment IL_RJA)................... 55
Table 5-1. Identification of parameters to be analyzed in Mt. Olive Old Lake...................................... 57
Table 6-1. Comparison of the BATHTUB and LAKE2K models. ........................................................60
FIGURES
Figure 2-1. Location of the Mt. Olive New Lake (IL_RJF), Mt. Olive Old Lake (IL_RJG), and Staunton
Lake (IL_RJA) watersheds........................................................................................................ 4
Figure 2-2. Elevation in the Mt. Olive New Lake (IL_RJF), Mt. Olive Old Lake (IL_RJG), and Staunton
Lake (IL_RJA) watersheds........................................................................................................ 6
Figure 2-3. GAP land use/land cover in the Mt. Olive New Lake (IL_RJF), Mt. Olive Old Lake
(IL_RJG), and Staunton Lake (IL_RJA) watersheds. ............................................................... 8
Figure 2-4. Distribution of STATSGO Map Units in the Mt. Olive New Lake (IL_RJF), Mt. Olive Old
Lake (IL_RJG), and Staunton Lake (IL_RJA) watersheds. .................................................... 12
Figure 2-5. Hydrologic soil group distribution. ......................................................................................... 14
Figure 2-6. USLE K-Factor distribution in the Mt. Olive New Lake (IL_RJF), Mt. Olive Old Lake
(IL_RJG), and Staunton Lake (IL_RJA) watersheds. ............................................................. 16
Figure 2-7. Depth to water table in the Mt. Olive New Lake (IL_RJF), Mt. Olive Old Lake (IL_RJG), and
Staunton Lake (IL_RJA) watersheds....................................................................................... 18
Figure 3-1. Climate summary for the Mt. Olive 1 E station (115917)....................................................... 21
Figure 4-1. Water quality sampling stations in the Mt. Olive Old, Mt. Olive New, and Staunton Lakes. 30
Figure 4-2. Total phosphorus and dissolved phosphorus observations in the Mt. Olive New Lake
(Segment IL_RJF). ..................................................................................................................32
Figure 4-3. Monthly statistics for total phosphorus in the Mt. Olive New Lake (Segment IL_RJF), 1989–
2002........................................................................................................................................32
Figure 4-4. Dissolved phosphorus monthly statistics in Mt. Olive New Lake (Segment IL_RJF), 1989–
2002........................................................................................................................................33
Figure 4-5. Proportion of dissolved phosphorus in total phosphorus for Mt. Olive New Lake (Segment
IL_RJF). .................................................................................................................................34
Figure 4-6. Monthly mean and median percentage of dissolved phosphorus comprising total phosphorus
for Mt. Olive New Lake (Segment IL_RJF), 1989–2002........................................................34
Figure 4-7. TN:TP ratios over the period of record in Mt. Olive New Lake (Segment IL_RJF). .......35
Figure 4-8. Monthly median and mean TN:TP ratios in Mt. Olive New Lake (Segment IL_RJF),
1989–2002. .......................................................................................................................35
Figure 4-9. Total suspended solids sampling observations in the Mt. Olive New Lake (Segment
IL_RJF)............................................................................................................................36
Figure 4-10. Monthly mean and median total suspended solids concentrations in Mt. Olive New Lake
(Segment IL_RJF), 1989–2002.........................................................................................37
Figure 4-11. Atrazine Sampling Observations in the Mt. Olive Raw Water Intake..............................38
Figure 4-12. Total phosphorus and dissolved phosphorus observations in Mt. Olive Old Lake
(Segment IL_RJG)............................................................................................................40
Figure 4-13. Monthly total phosphorus statistics in the Mt. Olive Old Lake (Segment IL_RJG), 1977–
1997. ................................................................................................................................40