39 
5. Phthalate Esters and Related Chemicals in 
the Chester River . 
Introduction . 39 
Distribution Patterns . 43 
Problem Statement . 43 
Experimental Procedures . 44 
Results and Discussion . 56 
6. Microbial Transformation of Tin. 87 
Experimental Procedures . 87 
Results and Discussion . 91 
Appendices 
A. Chester River Oyster Mortality . 103 
B. Account of Interlaboratory Tests on Split Samples. 112 
C. Methods for Water Quality Measurements in 
Tin Study.114 
x 
