4.18 Bioaccumulation Values for Tributyltin in Fish. IV- 40 



4.19 Bioaccumulation Values for Tributyltin in Molluscs. IV-41 



4.20 Environmental Concentrations of Organotin Compounds in U.S. 

 Waters. IV-45 



4.21 Ccmparison of Units Used in the Organotin Literature. IV-50 



IV-iv 



