WQ0034880_Staff Report_20220715

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: (Lauren Plummer) Facility name: Shinn Village WWTF
From: (Edward Watson)
Mooresville Regional Office
Note: This form has been adapted from the non -discharge facility staff report to document the review of both non -
discharge and NPDES permit applications and/or renewals. Please complete all sections as they are applicable.
I. GENERAL AND SITE VISIT INFORMATION
1. Was a site visit conducted? ® Yes or ❑ No
Date of site visit: 07/01/2022
Site visit conducted by: Inspection report attached? ❑ Yes or ® No
a. Person contacted: Ed Henriques and their contact information: (336) 288 - 7180 ext.
e. Driving directions:
2. Discharge Point(s):
Latitude: Longitude:
Latitude: 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:
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 52,830 GPD based on 125 three -bedroom and 53 four -
bedroom homes with the flow reduction.
Current permitted flow: N/A
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 the permit. All areas of concern are adequately
buffered and the maps display the buffer boundaries.
FORM: WQROSSR 04-14 Page 1 of 4

3. Are the site conditions (e.g., soils, topography, depth to water table, etc.) maintained appropriately and adequately
assimilating the waste? ® Yes or n 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 new permit, the site will be changing upon installation and development.
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:
7. Is the existing groundwater monitoring program adequate? ❑ Yes ® No ❑ N/A
If no, explain and recommend any changes to the groundwater monitoring program: A background well needs to
be installed in an upgradient position. Also, prosed downgradient well CW-2 needs to be installed.
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
If no, please explain: A request for additional information has been sent to the engineering company to submit a
map the includes the located of the groundwater monitor wells with location a relative position to the review and
compliance boundaries. 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 in order 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
n Notice(s) of violation n Currently under SOC n 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? n Yes n No ® N/A
If no, please explain:
13. Are there any issues related to compliance/enforcement that should be resolved before issuing this permit?
nYes ®NonN/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 4

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
Please verify 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 along with MW locations.
4
Please provide a detailed construction drawing of the collection line that is to
be constructed below the South Fork of Winthrow Creek.
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
n Deny (Please state reasons: )
4. Signature of report preparer: Edward Watson, Hydrogeologist 15 July 2022.
Signature of regional supervisor:
�DocuSigned by:
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Date:
7/15/2022
ADDITIONAL REGIONAL STAFF REVIEW ITEMS
1. This permit will employ the 2U Statues for a Reclaimed WW system.
2. The facility will need to verify at least one background well for groundwater monitoring for the proposed WWT
lagoon. There are wells already installed. 15A NCAC 02U.0202 APPLICATION FOR SUBMITTAL- NON -
CONJUNCTIVE SYSTEMS (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 waste treatment, storage, and utilization site(s) 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, 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.
FORM: WQROSSR 04-14 Page 3 of 4

7. The MRO is concerned with the installation of the collection line under the South Fork Winthrow Creek between
the dedicated application fields. The engineering design does not provide information on the construction of the
collection line under the creek. Any collection line installed under the creek needs to be engineered appropriately
to avoid potential impacts to the stream. The MRO would also suggest that a drop box repair area be installed on
upgradient side of the creek to be able to access the line so repairs can be performed if necessary.
8. Disinfection will include UV light banks and Chlorine for secondary treatment prior to spray irrigation, should
provide sufficient pathogen reduction to meet the 2Ustandards.
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.
10. The proposed spray irrigation field is 17.38 acres.
11. The application proposes an application rate of 7.315 inches/month.
12. The proposed cover crop for the spray irrigation field is fescue grass. It is expected that the cover crop could be
cut for hay.
13. Backup power supply generator will be installed to provide power to the WWTP in the event of a power failure.
14. A mini clik rain sensor will be installed to prevent the system from automatically irrigating when the sensor
indicates atmospheric moisture.
FORM: WQROSSR 04-14 Page 4 of 4