NC0020656_Performance Annual Report 2000_20000228

MAY 7 2001
DWQ
-PerformanceAnnual Report
1
MAY -22001
DENR - WATER QUALITY
POINT SOURCE BRANCH
I. General Information
Facility/System Name: City of Laurinburg Leith Creek Wastewater Plant
Responsible Entity: City of Laurinburg
Person in Charge/Contact: Robert A. Ellis, Director
Applicable Permit(s): NC0020656 / WQ962526-
13c boo2s2ip
Description of Collection System or Treatment Process:
The City of Laurinburg's collection System consist of 34 pump stations located throughout the
system. There are 123.7 miles of gravity sewers and 18.8 miles of force mains. Our Leith Creek
Wastewater Treatment 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 MGD. The second plant is an oxidation ditch
style with 1 clarifier, 1 chlorinator point and a return sludge pump station with 3 dual speed pumps
for a total treatment capacity of 4.0 MGD. The facility has 2 aerobic digesters one 150,000-gallon
tank and one 650,000-gallon tank with course air diffusers.
II. Performance
Text Summary of System Performance for Calendar Year 2000
The City of Laurinburg's Leith Creek Wastewater Treatment Plant had 1 month where the Operating
permit was in violation for the year 2000 and 3 other months that we were notified to check
compliant with explanation. (*) The non-compliance violation February 7`1i, and the 21st was that
the BOD test on the effluent samples did not meet the final D.O. concentration of at least 1 mg/1
remaining after the five days of incubation. On May 9th and the 1611' the seed correction on BOD test

did not meet the proper criteria and on May 15th, 2000 the effluent samples did not meet the
minimum D.O. depletion. In June of 2000 the non-compliance violation was due to Operator Error
where he failed to send the monthly samples, (Total Phosphorus, Total Nitrogen, Copper, Zinc) to
the laboratory and therefore we did not have any results to submit.. In August of 2000 our toxicity
results were invalidated by the state lab in Raleigh due to a 72 hour hold time. Below is a more
detailed listing on a month -by -month compliance status.
List (by month) any violations of permit conditions or other environmental regulations. Monthly
list should include discussion of any environmental impacts and corrective measures taken to
address violations.
Month NPDES Violations Status Reason
January No Violations Compliant N/A
February * Violations Compliant BOD test did not meet fmal D.O.
Concentration of at least 1 mg/1 remaining
After the five days of incubation.
March No Violations Compliant N/A
April No Violations Compliant N/A
May * Violations Compliant Seed correction on BOD test did not meet
The proper criteria & the effluent samples
Did not meet the minimum D.O. depletion.
June * Violation Compliant Operator did not send Monthly samples to
The contracted lab.
July No Violations Compliant N/A
August * Violations Compliant Toxicity results were invalidated due to a 72
Hour hold time (It exceeded the rule by 5
Minutes).
September No Violations Compliant N/A
November No Violations Compliant N/A
December No Violations Compliant N/A
Listed below is a summary of sanitary spills/overflows:
Months Location Volume
01-01-2000 Bridge Creek Pump Station 700 Gal.
01-26-2000 Bridge Creek Pump Station 2,500 Gal.
01-26-2000 525 llall Street 15,000 Val.
01-31-2000 525 Hall Street 2,100,000 Gal.

02-14-2000 525 Hall Street 10,000 Gal.
04-05-2000 Leith Creek WWTP 100 Gal.
05-23-2000 Bridge Creek Pump Station 150 Gal.
**08-19-2000 525 Hall Street 359,000 Gal.
09-03-2000 Bridge Creek Pump Station 250 Gal.
**Only one of these overflows caused an environmental impact on the receiving stream (Leith
Creek) of the Lumber River Basin. Results of this overflow was a fish kill of approximately 1,500
fish. The recommendation of the regional office were to restock Leith Creek with game fish, the City
of Laurinburg purchased fish from North Carolina Fish Hatchery to comply with this
recommendation.
III. Notification
State how this report has been made available to users or customers of the system and how those
users have been notified of its availability.
This Annual Performance Report will appear on the City of Laurinburg's Home page web site
http://www.laurinburg.org\ and a statement on our CCR (Consumer Confidence Report )will inform
citizens that the Annual Report is available via internet.
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.
Responsible Person: ot,-e,.�-,
Title: Treatment Plants Director
Entity: City of Laurinburg
Date: February 28, 2000