NC0028916_Facility Update_20060707

TOWN OF TROY
INCORPORATED 1852
Public Services Dept.
315 N. Main Street
Troy, NC 27371-2799
Phone: [phone]
Fax: [phone]
07/07/06
Belinda:
RECEIVED
JUL 13 2006
DENR- FAYETTEVILLE REGIONAL OFFICE
On 07/05/06 at approximately 7:10 AM, I got a call from my operator at our WWTP. He stated that he thought
we were losing water in our lagoon, since the water level was noticeably down from his Tuesday visual of the
lagoon. My staff and I proceeded immediately to the plant and began searching for any signs of a breech in the
lagoon's retaining banks. At approximately 7:35 AM we found a location where water was coming thru the
lagoon embankment between the lagoon and Densons Creek.
At the site where we discovered the leak, there was an old brick structure that had apparently been part of the
treatment process when the lagoon was used as the primary treatment for the Town's wastewater. The plant was
put into service in 1983 so about 23 years ago. We knew the structure was there, but since it played no part in
our operation, "I thought" the structure was simply an abandoned "relic" and we had no idea that there was a
"live" pipe running from the lagoon (as we later discovered). However, since water seemed to be coming out
directly below the structure, we began an exploratory dig on the lagoon side of the structure. We found dry dirt
all the way down until we reached an 8" pipe that seemed to head toward the center of the lagoon. The pipe was
broken completely in two approximately 4'-0" from the edge of the old structure. However, the two sections of
pipe were misaligned 4" or 5" so it did not appear that this break and separation had occurred any time recently.
But we did discover that this pipe (cast iron with walls approximately 1/2" thick) runs out into the lagoon.
Since we have never before experienced any noticeable, unexplained drop in our lagoon, we do not believe this
to have been an ongoing problem. We do believe that something happened out in the lagoon (maybe a pipe
breakage or joint separation due to settlement or maybe a concrete plug that just "came loose") that allowed the
lagoon water to enter the pipe "somewhere" along the pipe's length. This allowed lagoon water to run to the old
structure and since the pipe was separated there, instead of coming up in the structure, the water was running
around the old structure and into the creek. When we removed the old structure, we did not find any valves or
gates that would have stopped the flow of water at the old structure. Therefore, we can only conclude that the
water was prevented from entering the pipe somewhere in the lagoon for all these years and when a failure
occurred it happened instantaneously. I know this may sound patronizing, but at least five people look at the
lagoon daily (except for weekends) and prior to the fourth of July holiday, the lagoon was fine. Also, our
downstream sampling point is' below the location where this problem occurred. An examination of our..
downstream sampling data will show no rise in sample pollutant levels prior to this event

We corrected the problem by putting a new 8" gate valve on the stream end of the broken line and then
permanently, and I emphasize permanently, closing the valve. Using a valve was simply done because it was
the fastest way to stop the water flow. This repair was completed by 9:30 AM of that same morning. Along with
stopping the leak we also, as I indicated earlier, entirely removed the old structure and all associated piping.
There was a discharge pipe on the streamside of the structure and we removed it as well. A lagoon overflow
pipe with a valve on it was run into the old structure as well. We also removed that pipe and covered up the
valve that controlled flow to the structure. Per your recommendation, we will cut into the lagoon overflow pipe
(which is clearly in view) and re-route that pipe into our old chlorine contact chamber so that chlorination will
be possible should we ever need to use that pipe as an alternative to water running over and breaching our dam.
You have received the before repairs pictures and I will send the "after repairs" pictures on Monday (God
permitting) separate from this email. If you need anything further just give me a call at 910-572-7841.
Sincerely,
ay Walls, P.E.
Town Engineer/
Public Services Director

Form WWTP-BYPASS/UPSET
Treatment Plant (WWTP) Bypass/Upset Reporting Form 5-Day Report
PART
This form shall be submitted to the appropriate DWQ Regional Office within five days of the first knowledge of the unanticipated
bypass or upset.
Permit Number : NC0028916 (Always use treatment plant permit number)
Facility: Troy WWTP Incident # 200602098
Owner: Town of Troy
City: Troy
Region: Fayetteville
County: Montgomery
SPECIFIC location of the treatment units bypassed or where the upset occurred in the facility:
8" or 10" ductile iron pipe discovered discharging from the EQ lagoon.
Was the WWTP compliant with permit requirements? 11 Yes ❑ No Unknown
Was samples be taken during bypass?: ❑ Yes gi No UnknowrD
Incident Started EX.07/04/06 Time 11:00 AM Incident End Dt• Time:
(mm-dd-yyyy) hh:mm AM/PM (mm-dd-yyyy) hh:mm AM/PM
Estimated volume of the Bypass/Upset 5000
Describe how the volume was determined:
gallons
Weather conditions during bypass/upset event:
Did Bypass/Upset reach surface waters? ❑ Yes ❑ No U Unknown Volume reached surface waters (gallons):
Surface water name:
Did the bypass/upset result in a fish kill? ❑Yes ❑No •Unknown If Yes, estimated number of fish killed?
SPECIFIC cause(s) of the Bypass/Upset:
Other (Please explain in Part II)
WWTP-Bypass/Upset Form July 5, 2006
12:24 PM Page 1

Form WWTP-BYPASS/UPSET
Treatment Plant (WWTP) Bypass/Upset Reporting Form 5 Day Report
PART I I
ANSWER THE FOLLOWING QUESTIONS FOR EACH RELATED CAUSE CHECKED IN PART I OF THIS FORM AND
INCLUDE THE APPROPRIATE DOCUMENTATION AS REQUIRED OR DESIRED
COMPLETE ONLY THOSE SECTIONS PERTAINING TO THE CAUSE OF THE INCIDENT AS CHECKED IN PART I
(In the check boxes below, NA = Not Applicable and NE = Not Evaluated)
A HARDCOPY OF THIS FORM SHOULD BE SUBMITTED TO THE APPROPRIATE DWQ REGIONAL OFFICE
UNLESS IT HAS BEEN SUBMITTED ELECTRONICALLY THROUGH THE ONLINE REPORTING SYSTEM
Other (Please explain in Part II)
Describe:
Were adequate equipment and resources available to fix the problem?
If Yes, explain:
If the problem could not be immediately repaired, what actions were taken to lessen the impact of
the SSO?
Comments:
I 1 Yes ❑ No ❑ NA ❑ NE
As a representative for the responsible party, I certify that the information contained in this report is true and accurate to
the best of my knowledge.
Person submitting claim:
Signature: Title
Telephone Number:
Any additional information desired to be submitted should be sent to the appropriate Division Regional Office within
five days of first knowledge of the Bypass with reference to the incident number (the incident number is only generated
when electronic entry of this form is completed, if used).
WWTP-Bypass/Upset Form July 5, 2006
12:24 PM Page 2

search
Page 1 of 2
?4 I
nassi>i1pset 24.l:lour Details 5 Day Details 10 Day (Details Questions Agenei
u ^.
Permit : NC0028916 Incident Number : 200602098
Facility Name : Troy WWTP
Owner : Town of Troy
City : Troy
07/04/2006
11:00 am
*Bypass/Upset Start Date/Time:
Report Received:
*Did Bypass/Upset reach Surface Water?
*Fish Killed?
Other WaterBody:
5 Dav Details
*Bypass/Upset Start Date/Time:
County : Montgomery
Region : Fayetteville
07/05/2006
Yes No ! Unknown
Yes No Unknown
*End Date/Time:
Report Received:
*Did Bypass/Upset reach Surface Water?
*Fish Killed?
Other WaterBody:
Regional Contact :
County : Montgo niery_
*Location of Units being Bypassed?
" or 10" ductile iron pipe di t € v red d•s
Req Comments:
Yes
Yes
Specific Cause (check all that Apply)
Severe Natural Condition' Vandalism
Power outage
-Construction
No Unknown
No Unknown
*Est. Volume in gallons: 150(
Report Entered: 07/
Est. Volume: E
Est. Fish Killed?
Duration: r
*Est. Volume in gallons:
Report Entered:
Est. Volume:
Est. Fish Killed?
Date/Time (mm/dd/yyyy hh:mm am):
City : Troy
Pump Station Equipment Failure
Other (Please explain in Part II For DWQUse Only:
P )'�
Maintenance Upsets
hap ://bims.enr.state.nc.us:7001 /selectOneIncident.do?id=3 M05FMYG00VP 1 WP4A 11 K8F... 7/5/2006

Town ofTroy WWTP
Subject: Town of Troy WWTP
From: Belinda Henson <[e-mail]>
Date: Wed, 05 Jul 2006 11:30:53 -0400
To: "Dale.Lopez" <[e-mail]>, don register <[e-mail]>, Hughie White
<Hughie. [e-mail]>, Mark Brantley <[e-mail]>, trent alien
<trent. [e-mail]>
Gray Walls called today to report they noticed the level in the EQ lagoon was lower
than on Monday and found a pipe discharging on the'\far side of the lagoon parallel
to the the river. The pipe appeared to be ductile iron 8 or 10". They do not know
why the pipe was there or why it is discharging now. It appeared a plug may have
been in the pipe and for some reason it began to leak. They have placed a 8" valve
in and stopped the leak-. He is going to send me pictures on this and further
investigate this and be in touch with our office.
Belinda S. Henson
Regional Supervisor
NC DENR-Division of Water Quality
Surface Water Protection Section
Fayetteville Regional Office
[phone]
1 of 1 7/5/2006 11:41 AM

ii)4L).-e

1a4fl/hO( L