NC0035904_staff comments_19951019

Page 1
Note for Marcia Toler-McCullen
From: Marcia Toler-McCullen
Date: Thu, Oct 19, 1995 3:28 PM
Subject: RE: McCain Hospital
To: Farrell Keough
Thanks ! ! It does....This means there is only one discharge pipe for the facility now.
Therefore, I am removing the other four pipes and deleting off the subbasin map and list. So
this will not be confusing to anyone looking at the material.
From: Farrell Keough on Thu, Oct 19, 1995 3:23 PM
Subject: RE: McCain Hospital
To: Marcia Toler-McCullen
this is from my WLA notes:
1990: facility tied all outfalls into one pipe, (therefore 001 expanded from 0.100 mgd to
0.200 mgd). Remodeled w/ much longer segment due to high CBOD's and NBOD's,
(dissolved oxygen was not predicted to drop below 5.30 mg/1). Facility had been
experiencing high NH3-N levels in their effluent and did not have a good toxicity test record.
It was assumed that ammonia was the dominating reason for the toxicity failures. Facility
had primary and secondary Imhoff tanks, (basically an above ground septic tank) and
proposed expansion was for extended aeration package plant. Tedder over -rode the
recommended NH3-N limits, (1.4 / 4.9 mg/1) in favor of monthly Toxicity Testing. Instream
monitoring was increased; wkly over summer and monthly over winter. A 25.0 µg/1 residual
chlorine limit was also recommended.
Hope this helps
From: Marcia Toler-McCullen on Oct 19, 1995 3:19 PM
Subject: McCain Hospital
To: Farrell Keough
Can you tell me if there is only one outfall now for McCain Hospital (UT Mountain Creek in
03-07-51)? Previously there were 4 other pipes, however, they discharged to UT Field
Branch which flows into subbasin 03-06-15. If there other pipes are no longer there, I
want to remove them from 03-06-15, but I want to make sure there is no longer any
discharges there....Thanks.

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