REPORT DOCUMENTATION -"T^ ^ ....g./O; 



, Tttl» »nd SuMHU *• •'•oort 0*t« 



Identification of Toxic Substances in the Upper Illinois River October 1992 



Philippe E. Ross and Frank S. Dillon 



ng Organization Rapt. No 



River Research Laboratory 

 Forbes Biological Station 

 Illinois Natural History Survey 

 P.O. Box 599 

 Havana, IL 62644 



la Proiact/Taak/Worti Un)t No 



89/215 



11. Cantract(C) or GranKC) 

 (C) 



,n, WR3691 



12. Sponaonna Orsanxation Nama and Addr««t 



Illinois Department of Energy and Natural Resources 



Office of Research and Planning 



325 West Adams Street 



Springfield, IL 62704-1892 



11. Typa of Rapon & Pariod Covarao 



It. AbMTKt (Umtt .aOO worm) 



Between 1955 and 1958, several abundant species of acquatic 

 nail clams practically disappeared from the upper Illinois 

 equally drastic repercussions on the populations of ducks a 

 invertebrates. The situation changed very little into the 

 in water quality. This research found that porewater from 

 contains a toxic factor that inhibits the filtering ability 

 also negatively effects the water flea, while stimulating a 

 All evidence points to ammonia as the toxic agent. Also, a 

 contained toxic oil products, including polycyclic aromatic 

 naphthalene. A three phase Toxicity Identification and Eva 

 utilized in reaching these conclusions. 



insects, snails and finger- 

 River. These declines had 

 nd fish that fed upon tnese 

 1980s, despite improvements 

 relevant river sediments 



of fingernail clams and 

 Iga and bacteria growth. 

 t two sites, the porewater 



hydrocarbons , such as 

 luation methodology was 



Water Pollution, Toxicity, Water Pollution Effects (Animals) 

 Sedimants, Sedimentation, Suspended Sediments 



(Sm ANSt-239.18) 



S— Inatruetiona on Aovaraa 



OPTIONAL FORM 272 ( 



'Formariv NTIS-35) 

 Dapartmant of Con>mar 



