Accession Number : ADA452595


Title :   Investigation of PCB Release Rates from Selected Shipboard Solid Materials Under Laboratory-Simulated Shallow Ocean (Artificial Reef) Environments


Descriptive Note : Technical rept.


Corporate Author : SPACE AND NAVAL WARFARE SYSTEMS CENTER SAN DIEGO CA


Personal Author(s) : George, R D ; In, C R ; Johnson, R K ; Kurtz, C A ; Seligman, P F ; Gauthier, R D ; Wild, W J


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/a452595.pdf


Report Date : Apr 2006


Pagination or Media Count : 1015


Abstract : Release behaviors of polychlorinated biphenyls in solid materials (PCBs-ISM) were investigated under laboratory-simulated shallow-water leaching conditions for a series of intact representative shipboard solids found onboard vessels considered for use as artificial reefs. This effort focused on the following broad classes of shipboard solids: Electrical Cable, Felt Gasket, Bulkhead Insulation, Foam Rubber, Black Rubber, and Paint. Neat Aroclor(Registered) 1254 and 1268 were also evaluated under conditions identical to shipboard solids and serve as positive analytical controls. In this report, complete shipboard solid PCB leach rate results and data treatments for ambient pressure (1 bar) and 25 deg C are provided, with particular emphasis on using these empirical leach rate data in a risk assessment framework concerned with the re-use of ex-Navy vessels in constructing artificial reefs in coastal areas. Leach rate behaviors as a function of time were evaluated for short- and long-term impacts, with particular emphasis on how to best utilize the empirical leach rates for sunken vessel ecological and/or human health risk assessment scenarios. In such assessments, it is strongly recommended that shipboard-solid-specific empirical leach rates and regression analyses described in this investigation be used to characterize the temporal variability of the PCB mass flux and to support the choice of long-term leach rate values.


Descriptors :   *SOLIDS , *SHIPBOARD , *POLYCHLORINATED BIPHENYLS , DATA PROCESSING , COASTAL REGIONS , IMPACT , SHALLOW WATER , BULKHEADS , REEFS , RISK ANALYSIS , SUNKEN SHIPS , FOAM RUBBER , ELECTRIC CABLES , ONBOARD , PRESSURE , MASS FLOW , REGRESSION ANALYSIS , FLUX(RATE) , INSULATION


Subject Categories : Medicine and Medical Research
      Statistics and Probability
      Marine Engineering


Distribution Statement : APPROVED FOR PUBLIC RELEASE