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RECORD NUMBER: 37 OF 37

OLS Field Name OLS Field Data
Main Title Vertical Profiles of Toxicity, Organic Carbon, and Chemical Contaminants in Sediment Cores from the Palos Verdes Shelf and Santa Monica Bay, California.
Author Swartz, R. C. ; Schults, D. W. ; Lamberson, J. O. ; Ozretich, R. J. ; Stull, J. K. ;
CORP Author Environmental Research Lab.-Narragansett, Newport, OR. ;Los Angeles County Sanitation Districts, Whittier, CA.
Publisher c1991
Year Published 1991
Report Number EPA/600/J-93/083 ;ERLN-N139;
Stock Number PB93-173706
Additional Subjects Water pollution effects ; Sediments ; Toxicity ; Sewage disposal ; Palos Verdes Shelf ; Santa Monica Bay ; Outfall sewers ; Sediment-water interfaces ; Amphipoda ; Chemical compounds ; Vertical distribution ; Reprints ; Rhepoxynius abronius ; Total organic carbon
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB93-173706 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 08/23/1993
Collation 13p
Abstract
The toxicity of sediment to the amphipod Rhepoxynius abronius was determined in the laboratory for 5 cm vertical sections of sediment cores collected at two sites on the Palos Verdes Shelf near the Los Angeles County Sanitation Districts' municipal wastewater outfalls and at two reference sites in Santa Monica Bay, California. The vertical distribution of sediment toxicity near the outfalls was significantly correlated with profiles of total organic carbon and sediment chemical contamination (total oil/grease, p,p'-DDE, PCBs (Aroclor 1242), di(2-ethylhexyl)phthalate, Cd, Cr, Pb). Dating of core horizons showed that sediment toxicity also was significantly correlated with the historic record of the mass emission rate of suspended solids from the outfalls. The vertical profile showed that toxicity of surficial sediments, increased after the initiation of the discharge in the 1950s, remained relatively high until the early 1970s, and then decreased after the implementation of source control and improved effluent treatment. (Copyright (c) 1991 Elsevier Science Publishers Ltd, England.)