Marshall Steam Station (6)

November 16, 2009
Memorandum
To
From- Eric Fleek �4
Subject Balanced and Indigenous Populations Review—Benthos Communities. Lake Norman Near Marshall
Steam Station (NPDES Permit No NC0004987)
I have reviewed the subject document and offer the following comments and changes for future documents -
1) For future reports, (in addition to Tables 3-3, 3-4, 3-5, and 3-6) include a taxonomic table comparing taxa
occurrences for the current sampling year for EACH station so that a direct side-by-side comparison for each taxon
by each station for the sample year can be more easily conducted. Please see Table 1 as an example
3) For future reports, (in addition to Figures 3-1, 3-2, 3-3, 3-4, 3-5, and 3-6) include the following graphs for each
station and year (in the same format as currently presented) for the following groups- Non-Chironomid Diptera,
Ephemeroptera, Plecoptera, Trichoptera, Coleoptera, Odonata, Megaloptera, Crustacea, and Mollusca. Again, this
will allow for a more direct side-by-side comparison for each station and each taxonomic group In addition, EPT
taxa richness and EPT density should also be reported for each station going forward These metrics can be reported
in accordance with current graphical formats.
3) Based on a review of the current data, DWQ concludes that the benthos communities adjacent and below the
subject facility are approximately comparable to stations above the facility and therefore currently qualify as
"Balanced and Indigenous Populations"
Table 1
Waterbody LICKLOG BR
Date 8/9/2007
Location SR 1706
County Jackson
Taxon
EPHEMEROPTERA
ACENTRELLA SPP
PLAUDITUS DUBIUS GP C
BAETIS FLAVISTRIGA
BAETIS INTERCALARIS
BAETIS PLUTO
P EUDOCLOEON PROPINQUUM
SUGARLOAF CR SCOTT CR
8/9/2007 8/9/2007
OFF SR 1708 OFF SR 1556
Jackson Jackson
R
A
R
A
C
R