WQ0043421_Staff Report_20240123

State of North Carolina
Division of Water Resources
" Water Quality Regional Operations Section
Environmental Staff Report
Quality
To: ❑ NPDES Unit ® Non -Discharge Unit Application No.: WQ0043421
Attn: Zachary Mega Facility name: Shinn Village WWTF
From: Edward Watson
Mooresville Regional Office
Note: This form has been adapted from the non -discharge fg acili , staff report to document the review of both non -
discharge and NPDES permit applications and/or renewals. Please complete all sections as they are gpplicable.
I. GENERAL AND SITE VISIT INFORMATION
1. Was a site visit conducted? ❑ Yes or ® No
Date of site visit:
Site visit conducted by: Inspection report attached? ❑ Yes or ® No
a. Person contacted: Rob Willcox and their contact information: (336 339 - 9128 ext.
Modification to reduce the wetted field area due to additional setback restrictions did not require a second site
visit. The information for the staff report was able to be obtained by a review of the Soil Scientists
calculations for a 25% reduced flow for sprayfield wetted acres. The new total wetted area will be 16.97
acres.
2. Discharge Point(s):
Latitude:
Latitude:
Longitude:
Longitude:
3. Receiving stream or affected surface waters: This is a non -discharge permit. There is no outfall associated with this
permit.
Classification: N/A
River Basin and Subbasin No. N/A
Describe receiving stream features and pertinent downstream uses: N/A
II. EXISTING FACILITIES: MODIFICATION AND RENEWAL APPLICATIONS
1. Are there appropriately certified Operators in Charge (ORCs) for the facility? ❑ Yes ® No ❑ N/A
ORC: needs to be designated
Backup ORC: needs to be designated
2. Is the design, maintenance and operation of the treatment facilities adequate for the type of waste and disposal
system? ® Yes or ❑ No
If no, please explain:
Description of existing facilities: Community WWTF consisting of a treatment lagoon UV disinfection and piping
to spray irrigation field located within the community.
Proposed flow: The proposed flow to the WWTP is 50,760 GPD based on 125 three -bedroom and 53 four -
bedroom homes with the flow reduction. There is an additional 1,350 GPD associated for Pool Wastewater
design, for a total of 52,150 GPD.
Current permitted flow: N/A
FORM: WQROSSR 04-14 Pagel of 3

Explain anything observed during the site visit that needs to be addressed by the permit, or that may be important
for the permit writer to know (i.e., equipment condition, function, maintenance, a change in facility ownership,
etc.) MRO staff viewed the fields that are planned to be included in the permit. All areas of concern are
adequately buffered, and the maps display the buffer boundaries.
3. Are the site conditions (e.g., soils, topography, depth to water table, etc.) maintained appropriately and adequately
assimilating the waste? ® Yes or ❑ No
If no, please explain:
4. Has the site changed in any way that may affect the permit (e.g., drainage added, new wells inside the
compliance boundary, new development, etc.)? ® Yes or ❑ No
If yes, please explain: This is a modification to the permit, the wetted area is to be reduced to accommodate
required setbacks.
5. Is the residuals management plan adequate? ❑ Yes or ® No
If no, please explain: Each home has a septic tank to capture solids that will have to be pumped off separately.
6. Are the existing application rates (e.g., hydraulic, nutrient) still acceptable? ❑ Yes or ® No
If no, please explain: Application rates will be reduced to accommodate for the smaller wetted field area.
7. Is the existing groundwater monitoring program adequate? ® Yes ❑ No ❑ N/A
If no, explain and recommend any changes to the groundwater monitoring program:
8. Are there any setback conflicts for existing treatment, storage, and disposal sites? ❑ Yes or ® No
If yes, attach a map showing conflict areas.
9. Is the description of the facilities as written in the existing permit, correct? ® Yes or ❑ No
If no, please explain:
10. Were monitoring wells properly constructed and located? ® Yes ❑ No ❑ N/A
The GW-1 for CW-1 has been received.
If no, please explain: Has a review of all self -monitoring data been conducted (e.g., DMR, NDMR, NDAR,
GW)? ❑ Yes or ® No
Please summarize any findings resulting from this review: NDMR and NDAR-1 reports are to be submitted
monthly for the WWT system and Spray Application fields.
Provide input to help the permit writer evaluate any requests for reduced monitoring, if applicable.
11. Are there any permit changes needed to address ongoing BIMS violations? ❑ Yes or ® No
If yes, please explain: N/A
12. Check all that apply:
® No compliance issues ❑ Current enforcement action(s) ❑ Currently under JOC
❑ Notice(s) of violation ❑ Currently under SOC ❑ Currently under moratorium
Please explain and attach any documents that may help clarify answer/comments (i.e., NOV, NOD, etc.)
If the facility has had compliance problems during the permit cycle, please explain the status. Has the RO been
working with the Permittee? Is a solution underway or in place?
Have all compliance dates/conditions in the existing permit been satisfied? ❑ Yes ❑ No ® N/A
If no, please explain:
13. Are there any issues related to compliance/enforcement that should be resolved before issuing this permit?
❑ Yes ®No❑N/A
If yes, please explain:
14. Possible toxic impacts to surface waters: The maps presented in the permit display that all surface water features
have been buffered to prevent run-off.
15. Pretreatment Program (POTWs only): N/A
FORM: WQROSSR 04-14 Page 2 of 3

REGIONAL OFFICE RECOMMENDATIONS
1. Do you foresee any problems with issuance/renewal of this permit? ❑ Yes or ® No
If yes, please explain:
2. List specific special conditions or compliance schedules recommended to be included in the permit when issued:
Condition
Reason
1
ORC and Backup ORC need to be designated for this facility.
2
3
4
3. Recommendation: ❑ Hold, pending receipt and review of additional information by regional office
❑ Hold, pending review of draft permit by regional office
❑ Issue upon receipt of needed additional information
® Issue
❑ Deny (Please state reasons: )
4. Signature of report preparer: Edward Watson, Hydrogeologist 22 January 2024.
Signature of regional supervisor:
DocuSigned by:
A�w H Nuft
F161 FB69A2D84A3...
Date:
1/23/2024
ADDITIONAL REGIONAL STAFF REVIEW ITEMS
1. This permit will employ the 2U rules for a Reclaimed WW system.
2. A site visit was made previously. A permit document review was all that was required to verify field area
reduction. Flow and application reduction was reviewed as part of the modified permit application.
3. Agronomist reports are presented in the application. The MRO feels these reports are consistent with the soil
type of the application fields.
4. The Water Balance is included in the application. Based on the soil type identified, the MRO feels the application
rate could be adjusted upward if necessary to accommodate treated WWfrom the lagoon to maintain adequate
freeboard within the lagoon.
S. The community will be served by municipal water. Applications have been submittedfor 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.
6. The proposed spray irrigation field has been reduced from 17.38 acres to 16.97 acres.
7. The estimated Design Irrigation utilization of a monthly average daily flow consisting of 52,150 GPD is 42.34
inches/year and is the recommended design rate.
FORM: WQROSSR 04-14 Page 3 of 3