
                                  MEMORANDUM


Tetra Tech, Inc.
10306 Eaton Place, Suite 340
Fairfax, VA 22030
phone	703-385-6000
fax	703-385-6007


TO:			Record
FROM:		Kelly Meadows
DATE: 		February 24, 2011

SUBJECT:	Organism densities by waterbody type

The following document presents information on the density of organisms in various waterbody types.  Attachment A shows that impingement and entrainment (on a volumetric basis) is present in all waterbody types in similar concentrations.

