Please use this identifier to cite or link to this item:
Title: Bioaccumulation potential of contaminants from bedded and suspended Oakland Harbor Deepening Project sediments to San Francisco Bay flatfish and bivalve mollusks
Authors: McFarland, Victor A.
Clarke, Joan U.
Lutz, Charles H.
Jarvis, A. Susan.
Mulhearn, Brian.
Reilly, Francis J.
Keywords: Dredging--Pacific Coast (Calif.)--Environmental aspects
Bivalvia--California--San Francisco Bay
Publisher: Environmental Laboratory (U.S.)
U.S. Army Engineer Waterways Experiment Station.
Series/Report no.: Miscellaneous Paper (U.S. Army Engineer Waterways Experiment Station.) ; No. Miscellaneous Paper EL-94-7
Abstract: The Oakland Harbor Deepening Project (OHDP) has been on hold since 1987 due to public and resource agency concerns regarding further disposal of dredged sediments within San Francisco (SF) Bay. Dispersal of the fines fraction throughout the Bay was thought to occur following disposal operations at the Alcatraz site, resulting in transport of contaminants throughout the Bay system. The study described in this report was designed to address the potential for contaminant uptake in estuarine organisms through exposure to suspended and bedded OHDP sediments. Bioaccumulation that occurred from these sediments was put into perspective with bioaccumulation from sediments normally resuspended in the Bay by natural processes, and from a demonstrably contaminated sediment. Indigenous SF Bay organisms were exposed to either bedded or suspended sediment in replicate experimental units of the Flow-through Aquatic Toxicology Exposure System (FATES) at the WES. Sediments and tissues were analyzed for a suite of contaminants, including organotins, polynuclear aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), pesticides and DDE, and ten metals. Bioavailability of contaminants was determined by comparing tissue concentrations in each of the three species (clams, mussels, fish) after 28-day exposure, with background tissue concentrations taken immediately prior to the start of exposure. Bioavailable contaminants from the OHDP sediments were limited to Cd (Outer Harbor), Cr (Inner and Outer Harbor), and tributyltin (Inner Harbor). Most contaminants that bioaccumulated achieved remarkably similar tissue concentrations, particularly in the clams, from either bedded or suspended sediment exposures. Results of this bioaccumulation study suggest that disposal of OHDP Inner and Outer sediments at in-Bay aquatic disposal sites is unlikely to increase contaminant bioaccumulation above that which already occurs from naturally resuspended sediments.
Description: Miscellaneous Paper
Gov't Doc #: Miscellaneous Paper EL-94-7
Rights: Approved for Public Release; Distribution is Unlimited
Size: 320 pages / 13.54 Mb
Types of Materials: PDF/A
Appears in Collections:Miscellaneous Paper

Files in This Item:
File Description SizeFormat 
Miscellaneous Paper EL-94-7.pdf13.87 MBAdobe PDFThumbnail