WQ0000224_Staff Report_20210825

DocuSign Envelope ID: 68A6D362-OC1 2-4D75-8590-62E661 EFC83F
State of North Carolina
®r- Division of Water Resources
Water Quality Regional Operations Section
Environmental Staff Report
Quality
To: ❑ NPDES Unit ® Non -Discharge Unit Application No.: WQ0000224
Attn: Poonam Giri Facility name: Point Emerald Villas WWTF
From: Helen Perez
Wilmington 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 applicable.
I. GENERAL AND SITE VISIT INFORMATION
1. Was a site visit conducted? ® Yes or ❑ No
a. Date of site visit: 08/18/2021
b. Site visit conducted by: Helen Perez, Tyler Benson
c. Inspection report attached? ❑ Yes or ® No Located in Laserfiche
d. Person contacted: Dan Fortin and their contact information: (252) 241 - 9208 ext.
e. Driving directions: 10300 Coast Guard Rd, Emerald Isle
2. Discharge Point(s):
Latitude: Longitude:
Latitude: Longitude:
3. Receiving stream or affected surface waters:
Classification:
River Basin and Subbasin No.
Describe receiving stream features and pertinent downstream uses:
II. PROPOSED FACILITIES: NEW APPLICATIONS
1. Facility Classification: (Please attach completed rating sheet to be attached to issued permit)
Proposed flow:
Current permitted flow:
2. Are the new treatment facilities adequate for the type of waste and disposal system? ❑ Yes or ❑ No
If no, explain:
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.)? ❑ Yes ❑ No ❑ N/A
If no, please explain:
5. Is the proposed residuals management plan adequate? ❑ Yes ❑ No ❑ N/A
If no, please explain:
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DocuSign Envelope ID: 68A6D362-OC12-4D75-8590-62E661 EFC83F
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? ❑ 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:
9. For residuals, will seasonal or other restrictions be required? ❑ Yes ❑ No ❑ N/A
If yes, attach list of sites with restrictions (Certification B)
Describe the residuals handling and utilization scheme:
10. Possible toxic impacts to surface waters:
11. Pretreatment Program (POTWs only):
III. EXISTING FACILITIES: MODIFICATION AND RENEWAL APPLICATIONS
1. Are there appropriately certified Operators in Charge (ORCs) for the facility? ® Yes ❑ No ❑ N/A
ORC: Robert Howard
#:7180
Certificate #:996013 Backup ORC: Dan Fortin Certificate
2. Are 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:
operation of a 52,950 gallon per day (GPD) wastewater collection, treatment, and high -rate infiltration
facility consisting of the:
continued operation of a wastewater collection system consisting of. approximately 475 linear feet (LF) of
6 -inch gravity sewer; approximately 430 LF of 8 -inch gravity sewer; approximately 865 LF of 4 -inch force
main; a 125 gallon per minute (GPM) pump station with dual pumps, high water alarms, and standby power;
and all associated piping, valves, controls and appurtenances; the
continued operation of a 52,950 GPD wastewater treatment system consisting of. a manual bar screen; a 14,800 gallon
aerated flow equalization basin; a 6,900 gallon sludge holding tank; dual aeration tanks (one 36,000 gallon and one 18,000
gallon); dual clarifier tanks: dual sand filters; tablet chlorinators; a chlorine contact chamber; a dosing tank; standby
generator; effluent flow measurement; and all associated piping, valves, controls and appurtenances; the
continued operation of a 22,680 GPD high -rate infiltration system consisting of. a 0.08 acre rotary
distribution field; and all associated piping, valves, controls and appurtenances; and the continued operation of a historically
permitted 30,270 GPD low pressure pipe disposal systems consisting of. a 4,420 square foot (ft 2)- gravel covered subsurface
field; and all associated piping, valves, controls and appurtenances
Proposed flow:
Current permitted flow: 52,950 gpd
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.)
Although i reported effluent nitrate is relatively high, there is no current permit limit for nitrate and there were no
nitrate 2L violations in any of the wells. The treatment plant is not designed for denitrification.
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:
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DocuSign Envelope ID: 68A6D362-OC12-4D75-8590-62E661 EFC83F
3. 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:
4. Is the residuals management plan adequate? ® Yes or ❑ No
If no, please explain:
5. Are the existing application rates (e.g., hydraulic, nutrient) still acceptable? ® Yes or ❑ No
If no, please explain:
6. Is the existing groundwater monitoring program adequate? ® Yes ❑ No ❑ N/A
If no, explain and recommend any changes to the groundwater monitoring program:
7. Are there any setback conflicts for existing treatment, storage and disposal sites? ❑ Yes or ® No
If yes, attach a map showing conflict areas.
8. Is the description of the facilities as written in the existing permit correct? ❑ Yes or ® No
If no, please explain: See highlighted sections that were added to the description in IIL2 above.
9. Were monitoring wells properly constructed and located? ® Yes ❑ No ❑ N/A
If no, please explain:
10. Are the monitoring well coordinates correct in BIMS? ® Yes ❑ No ❑ N/A
If no, please complete the following (expand table if necessary):
Monitoring Well
Latitude
Longitude
O / //
O / 11
O / //
O I 11
O / //
O / //
O / //
O / //
O / //
O / 11
11. 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: Since the last renewal, a NOV was issued in 8/18 for a
monthly ammonia limit exceedance and there was a daily fecal limit exceedance in 6/19. GW-59s show TOC and
TDS exceedances in MW-4.
Provide input to help the permit writer evaluate any requests for reduced monitoring, if applicable.
12. Are there any permit changes needed in order to address ongoing BIMS violations? ❑ Yes or ® No
If yes, please explain:
13. 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:
14. Are there any issues related to compliance/enforcement that should be resolved before issuing this permit?
❑ Yes ®No❑N/A
If yes, please explain:
15. Possible toxic impacts to surface waters: NA
16. Pretreatment Program (POTWs only): NA
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DocuSign Envelope ID: 68A6D362-OC12-4D75-8590-62E661 EFC83F
IV. 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 the NPDES Unit or Non -Discharge Unit Central Office to obtain through an
additional information request:
Item Reason
3. List specific permit conditions recommended to be removed from the permit when issued:
Condition Reason
4. List specific special conditions or compliance schedules recommended to be included in the permit when issued:
Condition Reason
5. 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 (Ple,a &W-g eWons: )
6. Signature of report preparer:
Signature of regional supervisor:
Date: 8/25/2021
—1D645B4A39694BE...
,�Docu Signed by:
H44tll.k S"dej, KZ4,S
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DocuSign Envelope ID: 68A6D362-OC12-4D75-8590-62E661EFC83F
V. ADDITIONAL REGIONAL STAFF REVIEW ITEMS
This staff report was prepared for the renewal of Permit W00000224. This facility is an extended aeration package
plant with rotary distributor high -rate infiltration and historically permitted UP subsurface disposal systems. The
average flow for this 52,950 gpd facility in 2020 was approximately 4300 g=pd. Although reported effluent nitrate is
relatively high, there is no current permit limit for nitrate and there were no nitrate 2L violations in any of the wells.
The treatment plant is not designed for denitrification. The description needs to be corrected as highlighted above.
The prope manager for Point Emerald Villas has changed. WIRO has informed the new manager that new contact
and signature authority information/forms need to be completed so BIMS can be updated.
FORM: WQROSSR 04-14 Page 5 of 5