NCG551134_Inspection_20240820

August 20, 2024
Rosalia Perez Martinez
4581 Old NC 75
Oxford, NC 27565
Subject: Compliance Evaluation Inspection
Single Family Wastewater Treatment System
General NPDES Permit NCG550000
Certificate of Coverage NCG551134
Facility: 4581 Old NC 75, Oxford, NC
Granville County
Dear Mrs. Martinez:

On August 14, 2024, Tyler Clark 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) NCG551134 authorize the
discharge of domestic wastewater from your treatment system to receiving waters designated as unnamed
tributary of the Tar River (classified WS-V, NSW) in the Tar-Pamlico River Basin. The authorized
discharge is in accordance with the effluent limits and monitoring requirements established within the
General Permit. The items below show what conditions were noted at your facility:

Findings during the inspection were as follows:
1. Treatment system operation: The wastewater treatment system shall be maintained at all
times to prevent seepage of sewage to the surface of the ground.
2. 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.
Within 30 days of receiving this letter, please send a copy of the most recent
receipt/invoice to this office showing the date the septic tank was last checked and/or
pumped out. The General NPDES Permit requires the permittee to retain records
associated with sewage disposal activities for a period of at least 5 years.
Docusign Envelope ID: C1184385-6365-47B9-BAA6-6D75B708C9F3
Rosalia Perez Martinez, NCG551134
August 20, 2024 Page 2 of 3

3. 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. The
inspector observed chlorine tablets in the chlorinator. Please continue to ensure the
correct type of tablets are used and maintained in the chlorinator as required by the
General NPDES Permit.
4. 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 Residual Chlorine, Total Nitrogen, Ammonia Nitrogen and Total
Phosphorous. Within 30 days of receiving this letter, please let this office know if you
have monitored your effluent discharge within the last 12 months, and provide this office
with a copy of the lab results if you have. If you have not monitored your effluent, then
please collect a representative sample of the effluent, have it analyzed by a certified
commercial laboratory and submit the results to this office no later than October 31, 2024.
If, during this time, you are unable to collect a representative sample of the effluent
discharge due to insufficient flow from the discharge pipe, then update this office with that
information and continue to monitor the discharge and if conditions for sampling become
favorable, then arrange to collect a sample. Failure to monitor the effluent discharge as
required is a violation of NPDES General Permit NCG550000.
5. 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.

Part II Section B.14 of General Permit NCG550000 requires the permittee to “pay the annual
administering and compliance monitoring fee within thirty days after being billed by the Division.”
Division records indicate the required annual fee ($60 per year) for the period ending August 31, 2024
and due September 1, 2023, has been paid. There are no overdue fees for the subject COC.

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 reminded to maintain all
monitoring data and associated maintenance records onsite for a minimum of three years and
available for inspection.
Docusign Envelope ID: C1184385-6365-47B9-BAA6-6D75B708C9F3
Rosalia Perez Martinez, NCG551134
August 20, 2024 Page 3 of 3

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 items #2 & #4 above.

If you have questions or comments about this inspection or the requirements to take corrective action (if
applicable), then please contact Tyler Clark at 919-791-4242 or by email at [e-mail].

Sincerely,

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
Docusign Envelope ID: C1184385-6365-47B9-BAA6-6D75B708C9F3
EPA
United States Environmental Protection Agency
Washington, D.C. 20460
Water Compliance Inspection Report
Form Approved.
OMB No. 2040-0057
Approval expires 8-31-98
Section A: National Data System Coding (i.e., PCS)
Transaction Code NPDES yr/mo/day Inspection Type Inspector Fac Type
1 N 52 NCG551134 24/08/14 C S31112171819 20
21 66
Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA ----------------------Reserved-------------------
N67707172 73 74 75 80
Section B: Facility Data
Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include
POTW name and NPDES permit Number)
4581 Old NC 75
4581 Old NC 75
Oxford NC 27565
Entry Time/Date Permit Effective Date
Exit Time/Date Permit Expiration Date
02:00PM 24/08/14 21/08/18
Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s)
///
Other Facility Data
02:30PM 24/08/14 25/10/31
Name, Address of Responsible Official/Title/Phone and Fax Number
Rosalia Perez Martinez,4581 Old NC 75 Oxford NC 27565///Contacted
No
Section C: Areas Evaluated During Inspection (Check only those areas evaluated)
Permit Operations & Maintenance Records/Reports Facility Site Review
Effluent/Receiving Waters
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
(See attachment summary)
Name(s) and Signature(s) of Inspector(s)Agency/Office/Phone and Fax Numbers Date
Timothy Clark DWR/RRO WQ/919-791-4234/
Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date
EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete.
Page#1
8/15/2024
Docusign Envelope ID: C1184385-6365-47B9-BAA6-6D75B708C9F3
8/19/2024
NPDES yr/mo/day
24/08/14
Inspection Type
C3111218
1
Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary)
Findings during the inspection were as follows:
1. Treatment system operation: The wastewater treatment system shall be maintained at all times to
prevent seepage of sewage to the surface of the ground.
2. 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. Within 30 days of receiving this letter, please send a copy of
the most recent receipt/invoice to this office showing the date the septic tank was last checked and/or
pumped out. The General NPDES Permit requires the permittee to retain records associated with
sewage disposal activities for a period of at least 5 years.
Rosalia Perez Martinez, NCG551134
August 20, 2024 Page 2 of 3
3. 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. The inspector observed chlorine tablets in the chlorinator. Please continue to ensure the
correct type of tablets are used and maintained in the chlorinator as required by the General NPDES
Permit.
4. 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 Residual Chlorine,
Total Nitrogen, Ammonia Nitrogen and Total Phosphorous. Within 30 days of receiving this letter,
please let this office know if you have monitored your effluent discharge within the last 12 months,
and provide this office with a copy of the lab results if you have. If you have not monitored your
effluent, then please collect a representative sample of the effluent, have it analyzed by a certified
commercial laboratory and submit the results to this office no later than October 31, 2024. If, during
this time, you are unable to collect a representative sample of the effluent discharge due to
insufficient flow from the discharge pipe, then update this office with that information and continue to
monitor the discharge and if conditions for sampling become favorable, then arrange to collect a
sample. Failure to monitor the effluent discharge as required is a violation of NPDES General Permit
NCG550000.
5. 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.
Part II Section B.14 of General Permit NCG550000 requires the permittee to “pay the annual
administering and compliance monitoring fee within thirty days after being billed by the Division.”
Division records indicate the required annual fee ($60 per year) for the period ending August 31,
2024 and due September 1, 2023, has been paid. There are no overdue fees for the subject COC
NCG551134 17 (Cont.)
Page#2
Docusign Envelope ID: C1184385-6365-47B9-BAA6-6D75B708C9F3
Permit:NCG551134
Inspection Date:08/14/2024
Owner - Facility:
Inspection Type:
4581 Old NC 75
Compliance Evaluation
Operations & Maintenance Yes No NA NE
Is the plant generally clean with acceptable housekeeping?
Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable
Solids, pH, DO, Sludge Judge, and other that are applicable?
Comment:
Permit Yes No NA NE
(If the present permit expires in 6 months or less). Has the permittee submitted a new
application?
Is the facility as described in the permit?
# Are there any special conditions for the permit?
Is access to the plant site restricted to the general public?
Is the inspector granted access to all areas for inspection?
Comment:
Page#3
Docusign Envelope ID: C1184385-6365-47B9-BAA6-6D75B708C9F3