Order this information in Print

Order this information on CD-ROM

Download in PDF Format

     

Click here to make tpub.com your Home Page

Page Title: 9.1.3 Data Requirements
Back | Up | Next

Click here for a printable version

Google


Web
www.tpub.com

Home


   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Combat
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
USMC
   
Products
  Educational CD-ROM's
Printed Manuals
Downloadable Books
   

 

9.1.3 Data Requirements
The evaluation of plant bioaccumulation requires information on the CDF and
its environmental setting, the planned dredged material management, and the
characteristics of the dredged material, as well as information on animal ROC
populations outside the CDF from Chapter 8. Much of this comes from the
available information complied in Tier I, supplemented (if necessary) by the
Tier II and Tier III test data.
9.1.4 Summary of Tiered Evaluation of Plant Bioaccumulation
The other contaminant mobility pathways addressed in the UTM are evaluated
primarily on the basis of standards or criteria, and risk assessment plays a
relatively minor role in Tiers I through III. In the absence of technically
applicable standards or criteria, plant (and animal) bioaccumulation evaluations in
the UTM rely more directly on risk assessment in Tiers I through III. Evaluation
of all pathways relies on risk assessment in Tier IV.
The risk-based approach to evaluation of plant bioaccumulation is structured
around the conceptual site model developed in Tier I. The conceptual site model
provides the framework and the context for conducting the evaluation (Cura,
Wickwire, and McArlde in preparation). It describes the dredged material
management planned, the environmental setting of the site, and how the planned
site management interacts with the environmental setting to determine what
effects might potentially occur. The evaluation in Tiers I through III emphasizes
three components evaluated in the context of the conceptual site model:
Receptors of concern (ROC), discussed in Section 2.2.3. These are
animal populations off the site.
Constituents or contaminants of concern (COC), discussed in Sections
2.2.2 and 3.4.
Complete exposure routes, discussed in Section 3.2.4. Identification of
reasonable complete exposure routes by which ROC can come into direct
physiological contact with COC is key to the entire evaluation. If there
are no reasonable complete exposure routes, there can be no exposure and
thus no effect or risk.
Tier I involves many activities essential to the entire evaluation. It includes
compilation of available information, construction of a conceptual site model,
development of initial COC, identification of ROC, and identification of complete
exposure routes. Identification of complete exposure routes (and by implication,
those potential exposure routes that are not complete and thus pose no risk) is a
major emphasis of Tier I. Tier I also includes evaluation of the available
information to reach a decision about the acceptability of any COC/ROC/exposure
pathway combinations for which there is sufficient information for a decision and
identify the remaining COC for further evaluation in subsequent tiers.
9-3
Chapter 9
Plant Bioaccumulation

Privacy Statement - Press Release - Copyright Information. - Contact Us - Support Integrated Publishing

Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business