ACKNOWLEDGEMENTS 
The Evaluation of Chester River Oyster Mortality Biotoxicity 
study was performed by F. Douglas Martin and Willem H. Roosenburg 
of the University of Maryland, Center for Environmental and Estu¬ 
arine Studies, Chesapeake Biological Laboratory, Solomons, Mary¬ 
land, 20688. They wish to thank Dr. George Krantz of UM/CEES 
Horn Point Laboratories who advised on appropriate location of 
stations; Robert Miller, Daniel Carver, Sharon Ambrose, Dorothy 
Cutshaw, Wayland Owens, Rev. Mark Odell and others who assisted 
in field work; and Captain William Keefe and several Kent County 
residents for rescue services. 
David H. Freeman, Department of Chemistry, University of 
Maryland, College Park, Maryland, 20742, authored the study on 
Phthalate Esters and Related Chemicals in the Chester River 
Basin. The experimental work in this study was carried out by 
James C. Peterson and Sally A. Gingras. The work depended 
critically upon ultraclean glassware and John Trembly cooperated 
by facilitating routine use of the Chemistry Department's an¬ 
nealing ovens for this purpose. Mr. Arden Fox of Tenneco was 
helpful in providing details and insights to the history and 
present operations of the Tenneco plant and its bacterial waste 
processing facility. Captain O'Berry and the crew of the 
"Aquarius" ably assisted the collection of the Chester River 
water and sediment samples. The research sailing vessel "Huckle¬ 
berry Friend" and the facilities of the Podickory Sailing Assoc¬ 
iation were used to gather the reference samples from the mouth 
of the Chester River. Special thanks go to Dr. William Budde 
who generously provided cooperative measurements on split sedi¬ 
ment samples. Finally, we happily acknowledge the value of 
Professor Ron Hites' intensive short course on environmental 
applications of GCMS. Drs. Nelson Frew, Robert Gagosian and 
John Farrington at Woods Hole Oceanographic Institution provided 
helpful consultation during the course of this work. 
Microbial Transformation of Tin was under the direction of 
Joseph Cooney, Chesapeake Biological Laboratory, Center for 
Environment and Estuarine Studies, University of Maryland, 
Solomons, Maryland, 20688. Experimental work was conducted by 
L. E. Hallas, with the assistance of Marthe Cole-Jones and 
Terri Ekelund. 
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