WQ0016966_2021 Residuals Annual Report Review_20220502

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
NORTH CAROLINA
Environmental Quality
May 2, 2022
W. Kelly Craver, Interim Town Manager
Town of Denton
P.O. Box 306
Denton, NC 27329
SUBJECT: 2021 Residuals Annual Report Review
Town of Denton, Residuals Land Application Program
Permit No. WQ0016966
Davidson County
Dear Mr. Craver:
Division of Water Resources staff Caitlin Caudle completed a review of the 2021
Residuals Annual Report. This review mostly reflected compliance with the subject permit.
The following item of concern was noted:
A. Calcium and pH were not included on the Residual Sampling Summary Form.
These parameters were provided after Ms. Caudle contacted Troy Branch,
ORC, to request this additional information. Moving forward please refer to
Permit Condition IV.3 for all parameters that must be included on the
Residual Sampling Summary Form.
Land application notifications can be directed to Ms. Caudle at caitlin.caudle©ncdenr.gov
or 336-776-9699. A routine compliance inspection will be scheduled this calendar year.
Please review the enclosed inspection report for additional comments and observations.
If you have any questions, please contact Ms. Caudle at the letter head address, or by
the contact information listed above.
Sincerely,
,-DocuSigned by:
L-o,.
145B49E225C94EA...
Lon T. Snider, Regional Supervisor
Water Quality Regional operations Section
Division of Water Resources, NCDEQ-WSRO
Enc: Inspection Report
Cc: Troy Branch, ORC (electronic copy)
Zach Key, US Biosolids (electronic copy)
Davidson County Environmental Health (electronic copy)
Laserfiche File WQ0016966
WSRO Electronic Files
NORTH caaouvnD_E
oep.m.m orEMr n nt W.i�
North Carolina Department of Environmental Quality I Division of Water Resources
Winston-Salem Regional Office 1450 W. Hanes Mill Rd, Suite 300 I Winston-Salem, North Carolina 27105
336.776.9800

Compliance Inspection Report
Permit: WQ0016966 Effective: 04/14/20
SOC: Effective:
County: Davidson
Region: Winston-Salem
Contact Person: Zach D Key
Directions to Facility:
System Classifications: LA,
Primary ORC:
Secondary ORC(s):
On -Site Representative(s):
Related Permits:
NC0026689
NC0082949
Expiration: 09/30/26
Expiration:
Title:
Town of Denton - Denton WWTP
Town of Denton - Denton WTP
Inspection Date: 04/22/2022
Primary Inspector: Caitlin Caudle
Secondary Inspector(s):
Entry Time 08:OOAM
Certification:
Owner : Town of Denton
Facility: Town of Denton RLAP
300 Council Access Rd
Denton NC 27239
Exit Time: 10:OOAM
Phone: [phone]
Phone:
Phone: [phone]
Reason for Inspection: Routine Inspection Type: Annual Report Review
Permit Inspection Type: Land Application of Residual Solids (503)
Facility Status: Compliant ❑ Not Compliant
Question Areas:
▪ Miscellaneous Questions Record Keeping Sampling
▪ Pathogen and Vector Attraction
(See attachment summary)
Page 1 of 4

Permit: WQ0016966 Owner - Facility:Town of Denton
Inspection Date: 04/22/2022
Inspection Type : Annual Report Review
Reason for Visit: Routine
Inspection Summary:
Division of Water Resources staff Caitlin Caudle completed a review of the 2021 Residuals Annual Report. This review mostl}
reflected compliance with the subject permit. The following item of concern was noted:
A. Calcium and pH were not included on the Residual Summary Form. These parameters were provided after Ms. Caudle
contacted Troy Branch, ORC, to request this additional information. Moving forward please refer to Permit Condition IV.3 for
all parameters that must be included on the Residual Sample Summary Form.
Land application notifications can be directed to Caitlin Caudle at [e-mail] or 336-776-9699. A routine
compliance inspection will be scheduled this calendar year.
Additional information was requested on April 26, 2022, and provided on April 27, 2022, and May 2, 2022.
Other observations:
• All applied materials were from the WWTP. The WTP is a source for WQ0038071 US Biosolids Class A Permit.
• Sampling was completed on 8/25.
• Lime stabilization was used to meet pathogen and vector reduction requirements.
• Lime was applied to both fields applied on.
• Potassium was reported incorrectly on the Residual Summary Form, the correct value is 6,750 mg/kg.
• Selenium was reported wrong on the RSF, the correct value is 1.87 mg/kg.
• Calcium was not reported on the lab analysis included in the annual report. An amended lab analysis was provided with
calcium included.
• SAR was not included on the SFS but was calculated to be 2.25 by staff.
• pH was not included on RSF. Troy Branch, ORC, stated that the pH is measured after lime stabilization.
Page 2 of 4

Permit: WQ0016966 Owner - Facility:Town of Denton
Inspection Date: 04/22/2022
Inspection Type : Annual Report Review
Reason for Visit: Routine
Type
Distribution and Marketing
Land Application
Record Keeping
Is GW monitoring being conducted, if required?
Are GW samples from all MWs sampled for all required parameters?
Are there any GW quality violations?
Is GW-59A certification form completed for facility?
Is a copy of current permit on -site?
Are current metals and nutrient analysis available?
Are nutrient and metal loading calculating most limiting parameters?
a. TCLP analysis?
b. SSFA (Standard Soil Fertility Analysis)?
Are PAN balances being maintained?
Are PAN balances within permit limits?
Has land application equipment been calibrated?
Are there pH records for alkaline stabilization?
Are there pH records for the land application site?
Are nutrient/crop removal practices in place?
Do lab sheets support data reported on Residual Analysis Summary?
Are hauling records available?
Are hauling records maintained and up-to-date?
# Has permittee been free of public complaints in last 12 months?
Has application occurred during Seasonal Restriction window?
Comment:
Pathogen and Vector Attraction
a. Fecal coliform SM 9221 E (Class A or B)
Class A, all test must be <1000 MPN/dry gram
Geometric mean of 7 samples per monitoring period for class B<2.0*10E6 CFU/dry gram
Fecal coliform SM 9222 D (Class B only)
Geometric mean of 7 samples per monitoring period for class B<2.0*10E6 CFU/dry gram
b. pH records for alkaline stabilization (Class A)
c. pH records for alkaline stabilization (Class B)
Temperature corrected
d. Salmonella (Class A, all test must be < 3MPN/4 gram day)
Yes No NA NE
El
•
Yes No NA NE
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Yes No NA NE
O 000
O 000
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O 000
Page 3 of 4

Permit: WQ0016966 Owner - Facility:Town of Denton
Inspection Date: 04/22/2022
Inspection Type : Annual Report Review
Reason for Visit: Routine
e. Time/Temp on:
Digester (MCRT)
Compost
Class A lime stabilization
f. Volatile Solids Calculations
g. Bench -top Aerobic/Anaerobic digestion results
Comment:
Sampling
Describe sampling:
Is sampling adequate?
Is sampling representative?
Comment:
Yes No NA NE
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Page 4 of 4