LIST OF FIGURES 



Figure 1.1. Sampling stations on the Illinois Waterway 2 



Figure 1.2. Sampling stations in the Chicago area 3 



Figure 1.3. TIE procedures 7 



Figure 1.4. Phase I procedures 8 



Figure 4.1. Results of toxicity tests with five test species 26 



Figure 4.2. Fingernail clam response to porewaters 28 



Figure 4.3. Correlation of toxicity with ammonia 41 



