WQ0034880_Staff Report_20220719

DWR
State of North Carolina
Department of Environment and Natural Resources
Division of Water Resources
Division of Water Resources Water Quality Regional Operations Section
Staff Report
To: Non -Discharge Permitting Unit Application No.: WQ0043559
Attn: Lauren Plummer Facility Name: Shinnville Creek WWTF
From: Edward Watson
Mooresville Regional Office
I. GENERAL SITE VISIT INFORMATION
1. Was a site visit conducted? ® Yes or ❑ No
a. Date of site visit: 07/01/2022
b. Site visit conducted by: Edward Watson
c. Inspection report attached? ❑ Yes or ® No
d. Person contacted: Ed Henriques and their contact information: (336) 288 - 7180 ext.
e. Driving directions:
II. PROPOSED FACILITIES FOR NEW AND MODIFICATION APPLICATIONS
1. Facility Classification: TBD, this is a proposal based on an application for a—50KGPD WWTF to be constructed
for the Shinnville Creek community. Please refer to the permit application for complete details of the proposed
WWTF including construction designs.
2. Are the new treatment facilities adequate for the type of waste and disposal system? ® Yes or ❑ No
If no, explain:
Description of the proposed facility: Community WWTF consisting of a treatment lagoon, UV and Chlorine
disinfection and piping to the spray irrigation filed located within the community.
Prosed Flow: 50,220 GPD based on 118 three -bedroom and 53 four -bedroom homes with flow reduction.
3. Are site conditions (soils, depth to water table, etc) consistent with the submitted reports? ® Yes ❑ No ❑ N/A
If no, please explain:
4. Do the plans and site map represent the actual site (property lines, wells, etc.)? Z Yes No N/A
If no, please explain:
5. Is the proposed residuals management plan adequate? ® Yes n No ❑ N/A
If no, please explain: Each home has a septic tank to capture solids that will have to be pumped off separately.
6. Are the proposed application rates (e.g., hydraulic, nutrient) acceptable? ® Yes ❑ No ❑ N/A
If no, please explain:
7. Are there any setback conflicts for proposed treatment, storage and disposal sites? n Yes or ® No
If yes, attach a map showing conflict areas.
8. Is the proposed or existing groundwater monitoring program adequate? ❑ Yes ® No ❑ N/A
If no, explain and recommend any changes to the groundwater monitoring program: Complete the installation of
the proposed monitoring wells associated with the review and compliance boundaries and present a map of the
well locations. The map should also display topography. The Latitude and Longitudinal location for the
individual wells has been submitted in the application package on pp 15.
FORM: WQROSSR 02-14 Page 1 of 3

9. For residuals, will seasonal or other restrictions be required? ❑ Yes ❑ No ® N/A
If yes, attach list of sites with restrictions (Certification B)
10. Are there appropriately certified Operators in Charge (ORCs) for the facility? n Yes ® No ❑ N/A
ORC: Certificate #: Backup ORC: Certificate #:
Please provide information for certified ORC and Backup ORC for the proposed facility.
11. Are there any setback conflicts for existing treatment, storage, and disposal sites? ❑ Yes or ® No
If yes, attach a map showing conflict areas.
12. Is the description of the facilities as written in the permit correct? ® Yes or ❑ No
If no, please explain:
III. REGIONAL OFFICE RECOMMENDATIONS
1. Do you foresee any problems with issuance/renewal of this permit? ❑ Yes or ® No
If yes, please explain:
2. List any items that you would like APS Central Office to obtain through an additional information request:
Item
Reason
1
ORC and Backup ORC need to be designated for this facility.
2
Please very locations for the groundwater monitoring wells that will be active
for this system.
3
Please present a map indicating the locations of the review and compliance
boundaries for the WWT Lagoon and spray fields, including MWs.
4
Section VII IRRIGATION SYSTEM DESIGN 15A NCAC 02T . 0505, presents
no recommended loading rate for the spray application of the treated WW.
Please present a recommended Loading Rate in (in/hr). The RO has estimated
the loading rate based on the Soil Scientist report and the Hydrogeological study
presented in the application.
5
Please provide a detailed construction drawing of the collection line that is to be
constructed below the creek.
3. List specific special conditions or compliance schedules recommended to be included in the permit when issued:
Condition
Reason
4. Recommendation: ® Hold, pending receipt and review of additional information by regional office
❑ Hold, pending review of draft permit by regional office
n Issue upon receipt of needed additional information
Issue
Deny (Please state reasons: )
5. Signature of report preparer: Edward Watson Date 7/18/2022
FORM: WQROSSR 02-14
Page 2 of 3

DocuSigned by:
A 4+014tili H P,za.t
7/19/2022
F161 FB69A2D84A3 Signature of APS regional supervisor: Date:
IV. ADDITIONAL REGIONAL STAFF REVIEW ITEMS
1. This permit will employ the 2U statues for a Reclaimed WW system.
2. 15A NCAC 02U APPLICATION FOR SUBMITTAL — NON -CONJUNCTIVE SYSEMS (4)(d)(2) the location of all
wells (including usage and construction detail, if available), streams (ephemeral. intermittent, and perennial),
springs, lakes, ponds, and other surface drainage features within 500 feet of all water treatment, storage, and
utilization sites and delineation of the review and compliance boundaries.
3. A flow reduction has already been filed for the permittee. Flow reduction will employ the installation of
appliances, toilets and shower heads that are efficient in water use reduction.
4. The MRO feels the setbacks meet the 2U reclaimed water statues.
5. Agronomist reports are presented in the application. The MRO feels these reports are consistent with the soil type
of the application fields.
6. The Water balance is included in the application. Based on the soil type identified, and the two application fields
of 17.64 acres and 6.8 acres, the MRO agrees with the proposed design application rate. The application rate
may be adjusted to accommodate the required two foot offreeboard for the WW treatment lagoon and the 5-day
upset pond.
7. The Lagoon has a proposed 20.27 days of storage. A maximum storage capacity of just over 1 million gallons of
WW is available in the lagoon. Therefore, irrigation rates will need to be adjusted to be at an application rate to
account for the storage capacity of the lagoon.
8. The application proposes two spray irrigation fields with a total of 24.2 acres. The Soil Scientist value using the
Ksat for the most limiting soil type report recommends application rate could be 6.88 inches/month if applied
over a 24hr/day application period.
9. The community will be served by municipal water. Applications have been submitted for the construction of
municipal water to be piped to the community. There is discussion regarding the construction of a backup WSW.
Please notes the DWR if a well is to be constructed for the community.
10. Disinfection will include UV light banks and Chlorine for secondary treatment prior to spray irrigation, should
provide sufficient pathogen reduction to meet the 2U standards.
11. The proposed cover crop for the spray irrigation field is fescue grass. It is expected that the cover crop could be
cut for hay.
12. Backup power supply generator will be installed to provide power to the WWTP in the event of a power failure.
13. A mini-clik rain senor will be installed to prevent the system from automatically irrigating when the senor
indicates atmospheric moisture.
14. The MRO is concerned with the permittee using the application area as a dual use green space for the
community.
Although the reclaimed water being applied to the application fields are to 2U standards, it presents the potential
for the irrigation equipment to be damaged by dual use recreation at the application fields. The application fields
will have to have signage to indicate that reclaimed water is employed.
15. The application will have a collection line constructed beneath surface water features. Please consider the
installation of repair areas/valving to be installed to prevent WW from entering the surface water feature.
FORM: WQROSSR 02-14 Page 3 of 3