HomeMy WebLinkAboutNC0062855_Performance Annual Report 2009_20100115Mayor, Theron K. Bell
Commissioners:
Lynn M. Loy, Mayor Pro Tem
Joey Boswell
Terri Holt
Clifton F. Marley
Claire A. Matthew
January 15, 2010
NC Division of Water Quality
NPDES Permit Issuing Authority
1617 Mail Service Center
Raleigh, NC 27699-1617
TOWN OF ROBBINS
PO Box 296
Robbins, NC 27325
(910) 948-2431
Fax: (910) 948-3981
RE: System Performance Annual Report
NPDES Permit Number: NC0062855
Town of Robbins, Moore County, NC
Dear Permitting Authority:
Town Manager
George T. Hayfield
DER -FRO
JAN 2 1 M B
DWO
Enclosed is the Annual Performance Report for the Town of Robbins Wastewater
Treatment Plant during the year 2009. We believe this report to be accurate and
complete. Our customers will be notified of the availability of this report through the
local newspaper or water/sewer bills.
A copy of this report has been forwarded to the Fayetteville Regional Office. If you
have any questions, or require more information, please contact us.
Since ely,
Rodney L. Kiser
WWTP Manager/ORC
CERTIFICATION
I have personally examined this report and I am familiar with the information contained therein. Based upon my
inquiry of the individuals immediately responsible for obtaining the information reported herein, I believe that
the submitted information is true, accurate, and complete. I am aware that there are significant penalties for
submitting false information.
Signed this ! W t-In day of 3"akcow y , 2010
George T. Hayfield, Town Manager
A.1)-\-4Li
DENR-FRO
MVO
2009 ANNUAL PERFORMANCE REPORT
. TOWN OF ROBBINS
WASTEWATER TREATMENT PLANT
GENERAL INFORMATION:
Facility/System Name: Town of Robbins Wastewater Treatment Plant
NPDES Permit Number: NC0062855
Responsible Entity: Town of Robbins
CONTACT INFORMATION:
Permittee: George T. Hayfield, Town Manager
PO Box 296
Robbins, NC 27325
910-948-2431
WWTP ORC: Rodney L. Kiser, WWTP Manager/ORC
PO Box 296
Robbins, NC 27325
910-948-3063
EN
3 F 0
JAN 2 1 2010
DWG)
DESCRIPTION OF TREATMENT PROCESS:
All wastewater is conveyed to the Robbins WWTP via a permitted collection system. The collection system
consists of approximately 8.4 miles of gravity sewer, 1.5 miles of force main, and three duplex pump stations.
The Town of Robbins WWTP is an extended aeration facility. It has a design capacity of 1.3 MGD. Treatment
is initiated at a preliminary treatment unit (headworks), which consists of a grit removal unit, semi -cylindrical
fine screen, and a manual bar screen. De -gritted and screened wastewater is pumped to a secondary treatment
unit. Dual activated sludge treatment units are provided with integral center -feed clarifiers. Mixing and aeration
are provided by diffused aeration. Caustic soda is added at the head of the system to add alkalinity. Aluminum
sulfate is added prior to the clarifiers to facilitate settling o f the solids. Clarified effluent is disinfected by
chlorination, and then de -chlorinated with sulfur dioxide. Settled sludge is either returned to the system as
Return Activated Sludge or wasted to an aerobic digester for further stabilization. After digestion is completed,
the stabilized sludge is land applied in liquid form onto permitted land application sites. The effluent from the
wastewater treatment plant is discharged into the Deep River, in the Cape Fear River Basin.
COMPLIANCE PERFORMANCE:
The Town of Robbins WWTP and Collection System are regulated by the NC Department of Environmental
and Natural Resources (NCDENR). The Town possesses a National Pollutant Discharge Elimination System
(NPDES) permit that includes water quality limits and sampling monitoring requirements. The NPDES permit
requires the Town to test more than 20 different constituents in the treated water. The monitoring frequency for
these constituents are set at various intervals such as continuous, daily, weekly, three times per week, monthly,
and quarterly. The Wastewater Treatment Plant was 100% compliant with all of the NPDES permit
requirements for the reporting period. The Wastewater Treatment Plant consistently achieves 92-99% efficiency
of removal of BOD and TSS. The following is a summary of the testing for parameters that are assigned Water
Quality Standards by the NPDES permit.
Please Note: The summary. may not include parameters that only incorporate a monitoring requirement, nor
does it include daily process control testing.
CONSTITUENT NUMBER REQUIRED NUMBER CONDUCTED
Flow Continuous Continuous
Biochemical Oxygen Demand 52 52
Total Suspended Solids 52 52
Ammonia 52 52
Fecal Coliform 52 52
Chlorine Residual 104 _ 113
Total Nitrogen 12 12
Total Phosphorus 52 52
Oil & Grease 52 52
Zinc 12 12
Mercury 12 12
Cyanide 12 12
Copper 12 12
Conductivity 52 52
Dissolved Oxygen 52 242
PH 52 365
Temperature 260 365
Toxicity 4 4
In addition to the required testing, the Town conducted approximately 2,500 in-house control tests to ensure the
proper operation of the wastewater treatment plant. Some of the plant control tests were pH, temperature,
ammonia, alkalinity, nitrates, dissolved oxygen, settleability, suspended solids, and oxygen uptake rate.
SUMMARY OF PERMIT VIOLATIONS:
There were no permit violations during the reporting period.