NC0062855_Performance Annual Report 2010_20110127

Mayor Theron K. Bell
Commissioners:
Lynn M. Loy, Mayor Pro Tem
A. H. Davis Jr.
Terri Holt
Joey Boswell
Claire A. Barrow
January 27, 2011
TOWN OF ROBBINS
PO Box 296
Robbins, NC 27325
[phone]
Fax: [phone]
NC Division of Water Quality
NPDES Permit Issuing Authority
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: System Performance Annual Report
NPDES Permit Number _NC0D62855 -
Town of Robbins, Moore County, NC
Dear Permitting Authority:
Town Manager
George Hayfield
FEB 08 2011
Enclosed is the 2010 Annual Performance Report for the Town of Robbins Wastewater
Treatment Plant. We believe the report to be complete and accurate. Our customers will
be notified of the availability of the 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.
Sincerely,
Rodney L. Kiser
WWTP Manager/ORC
EggtiMIEN
FEB 0 3 2019

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 2 h d day of .e l v-K'try , 2011
George T. Hayfield, Town Manager

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
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 of 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 104 110
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 52 231
PH 52 355
Temperature 260 354
Toxicity 4 4
In addition to the required testing, the Town conducted approximately 2,000 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:
The WWTP did experience a minor spill on 09/30/2010 at the wwtp grounds due to a cracked pipe about 6 feet
under ground. This allowed untreated water to reach the ground surface and then drain down toward a storm
drain. Repairs were made quickly and most untreated water stayed on the ground surface, however about 250
gallons reached the storm drain and may have made it into Bear Creek. The area around the leak was lime
stabilized after repair and no environmental damage occurred. This was reported to NCDENR within 24 hours
under incident # 201002842.