NCG551378_Compliance Evaluation Inspection_20210920

ROY COOPER
Governer
ELIZABETH S. BISER
Srcretory
S. DANIEL SMITH
Oil CC for
Sylvester Brown
802 Walsenburg Drive
Durham, NC 27712
NORTH CAROLINA
Envfronnten tal Quality
September 20, 2021
Subject: Compliance Evaluation Inspection
Single Family Wastewater Treatment System
General NPDES Permit NCG550000
Certificate of Coverage NCG551378
Facility: 802 Walsenburg Drive
Durham County
Dear Mark Sanderlin:
On September 14, 2021, Jane Bernard from the Raleigh Regional Office visited your single-family residence
(SFR) wastewater treatment system to evaluate compliance with the subject General NPDES Permit. Your
assistance during the inspection was greatly appreciated.
Our records indicate the treatment system consists of a septic tank, sub -surface sand filter, tablet chlorinator
with chlorine contact chamber, discharge pipe and a rip -rap apron for post aeration).
General NPDES Permit NCG550000 and Certificate of Coverage (COC) NCG551420 authorize the discharge
of domestic wastewater from your treatment system to receiving waters designated as Crooked Creek (classified
WS IV, NSW) in the Neuse River Basin. The authorized discharge is in accordance with the effluent limits and
monitoring requirements established within the General Permit. The checked boxes below show what
conditions were noted at your facility:
® Pumping the septic tank: You are required to inspect the septic tank at least yearly to determine if
solids must be removed or if other maintenance is necessary. Septic tanks should be pumped out every
five years or when the solids level is found to be more than 1/3 of the liquid depth in the septic tank
compartment, whichever is greater. A pumping company can check the status periodically and
determine when pumping is required. The septic tank was pumped on March 29, 2021.
® Chlorine tablets in the chlorinator: You are reminded that it is required that chlorine tablets be
maintained in the chlorinator to ensure proper disinfection of the discharged wastewater. Chlorine
tablets provide effective disinfection and prevent'limit harmful bacteria from discharging to the
environment. The product label for these tablets must indicate the tablets are approved for wastewater
use and not for swimming pools. Part 1, Section D (1) of General NPDES Permit NCG550000 requires
the permittee to inspect the tablet chlorinator weekly to ensure there is an adequate supply of tablets for
continuous and proper operation. Section D (4) requires the permittee to maintain all system
components, including...disinfection units...at all times and in good operating order. Only use
wastewater approved tablets in the chlorinator as required by the General NPDES Permit.
North Carolina Department of Environmental Quality 1 Division of Water Resources
Raleigh Regional Office 3300 Barret! Drive j Raleigh. North Carolina 2 hOR
90.701.41,00

® Analyzing the effluent: Part 1. C., Effluent Limitations and Monitoring Requirements, within
General Permit NCG550000 requires a permittee to sample and analyze the effluent leaving his/her
treatment system prior to discharge annually. Parameters to be sampled and analyzed include Flow,
BOD (Biochemical Oxygen Demand), Total Suspended Solids, Fecal Coliform, Total Nitrogen,
Ammonia, Total Phosphorous and Total Residual Chlorine. During the inspection, you informed the
inspector that there is not enough flow to sample. Please monitor the effluent pipe during heavy use, if a
flow is observed please make arrangements to sample during heavy use times. Failure to monitor the
effluent discharge as required is a violation of NPDES General Permit NCG550000.
® Discharge outlet location. The permittee is required to conduct a visual review of the outfall
location at least twice each year (one at the time of sampling) to ensure that no visible solids or other
obvious evidence of system malfunctioning is observed. Any visible signs of a malfunctioning system
shall be documented and steps taken to correct the problem. The discharge pipe was visible and
accessible the day of the inspection. Please continue to ensure the outlet is always visible/maintained
and cleared of vegetation, soil and leaves
Please continue to periodically inspect the wastewater treatment system to ensure the treatment components are
always maintained and in good operating order. You are also reniinded to maintain all monitoring data and
associated maintenance records onsite for a minimum of three years and available for inspection.
Within 30-days receipt of this letter, please submit a written response to this office indicating the actions you
will take or have taken to comply with or resolve the issues noted above.
If you have questions or comments about this inspection or the requirements to take corrective action (if
applicable), then please contact Jane Bernard, [phone].
Vanessa E. Manuel, Assistant Regional Supervisor
Water Quality Regional Operations Section
Raleigh Regional Office
Division of Water Resources, NCDEQ
Attachment(s): EPA Water Compliance Inspection Report
Cc: RRO.SWP Files
Laserfiche
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North Carolina Department of Environmental Quality I Division of Water Resources
Raleigh Regional (Mice 3800 Uarrett Drive I Raleigh. North Carolina 27(309
414,741.4200