NC0020656_Performance Annual Report 2006_20070312

Annual Performance Report 2006
General Information
Facility/System Name: City of Laurinburg Leith Creek Wastewater Plant
DEN
Responsible Entity: City of Laurinburg
Person In Charge/Contact: Robert A. Ellis, Treatment Plants Director
Applicable Permit(s) NC0020656 / WQ002526 / WQCS00062
Description of Collection System
DENR - WATER QUALITY
POINT SOURCE EEY-.F.,CH
MAR 2
The City of Laurinburg's collection system consists of 34 pump stations located throughout the
system. There are 123.7 miles of gravity sewers and 24 miles of force mains. Our Leith Creek
Plant consist of two types of treatment, one extended aeration plant, consisting of 2 aeration
basins, 2 clarifiers, 2 chlorine contact chambers and one return sludge pump station with 3 dual
speed pumps, total capacity 2.0 million gallons per day (MGD).
The second plant is an oxidation ditch style with 1 clarifier, 1 chlorination point and 1 return
sludge pump station with 3 dual speed pumps, total capacity 2.0 MGD, for a total treatment
capacity of 4.0 MGD. The facility has 2 aerobic digesters, (1) 150,000-gallon tank and (1)
650,000-gallon tank with course air diffusers.
Summary of System Performance for Calendar Year 2006
The discharge from the City of Laurinburg's Leith Creek Wastewater Treatment Plant was in non-
compliance during the month of July, November & December.
Month NPDES Violation Reason(s)
July Exceeded Minimum We reduced the amount of time
PH weekly requirement. we ran the aerators and this
increased the pH.
November Failed Toxicity Test The Organisms did not die but they
failed to reproduce.
December Failed Toxicity Test The organisms did not die but they
Have no results for Total Nitrogen, failed to reproduce as well as the
Total Phosphorous, Copper & Zinc. control sample. Chief Operator failed
to collect monthly samples so no
results were provided for the monthly
test in December.

Summary of Sanitary Spills/Overflows:
Months Location
05/19/06 N. Main & McGirts Bridge Rd.
08/21/06 Force Main on Hasty Road
11/15/06 Canal at the end of Avery St.
Volume
800 Gallons
500 Gallons
250 Gallons
Summary of Sanitary Spills/Overflows (continued):
Sanitary sewer overflow events in which volumes exceeding 1,000 gallons overflowed and reach
surface waters are included in the monthly estimates and are shown separately as follows:
Date Location Gallons
05/07/06 Manhole Crn. 2,000
McGirt Bridge Rd.
& N. Main St.
11/22/06 Pizza Hut
Pump Station
1811 South
Main Street
11/22/06 Bridge Creek
Pump Station
1,000
Description Corrective Measures
Excessive Rainfall Cleaned and video the line
& Grease Found no problems. We will
inspect this line more frequently.
Excessive Rainfall
4 Inches in 24 Hrs
100,000 Excessive rainfall
4 Inches in 24 Hrs.
12/28/06 Aerial Line 7,200
Carver Street
Excessive Rainfall
caused erosion to the
support on the aerial
sewer line
Replaced Interceptor to
reduce Inflow & Infiltration
All Equipment working
properly.
Temporary repairs were made
to contain it immediately and on
1/2/07 permanent repairs were
made.
*Note the overflows listed resulted in no environmental impact.
Notification
This Annual Performance Report will appear on the City of Laurinburg's web site
http://www.laurinburg.org and a statement on our Consumer Confidence Report (CCR) will inform
citizens that the Annual Report is available via internee or upon request.
Certification
I certify under penalty of law that this report is complete and accurate to the best of my knowledge.
I further certify that this report has been made available to the users or customers of the named
system and that those users have been notified of its availability.
Robert A. Ellis, Treatment Plants Director
Treatment Plants Director
City of Laurinburg
March 12, 2007 -