NC0070033_Fact Sheet_20240514

NCDEQ / DWR / NPDES
EXPEDITED FACT SHEET - NPDES PERMIT RENEWAL
NPDES Permit NCO070033
Catherine Shadwell, Compliance & Expedited Permitting Unit / 919-707-3613 April 2024
FACILITY INFORMATION
Applicant/Facility Name
Quail Run MHP Pads LLC (attn Kevin Murray, Owner)
Quail Run Mobile Home Park
Applicant Mailing Address
113 Center St Suite 201 Lexington NC 27292
Facility Physical Address
136 Quail Place Dr Winston-Salem NC 27127
Permitted Flow (MGD)
0.017 MGD
Type of Waste
100% Domestic, < 1 MGD
Facility Class
WW-1
County
Davidson
Permit Status
Renewal
Regional Office
WSRO
STREAM CHARACTERISTICS
Receiving Stream
Miller Creek
Stream
Classification
C
Stream Segment
12-94-14
Outfall Lat.
350 59' 12.1" N
7Q10 - Summer (cfs)
0.2
Outfall Long.
800 15' 59" W
7Q 10 - Winter (cfs)
0.4
Drainage basin
Yadkin -Pee Dee
30Q2 (cfs)
0.5
Subbasin
03-07-04
Average Flow (cfs)
1.4
HUC
030401011308
IWC (%)
11.64% (summer) /
6.18% (winter)
303(d) List
Not listed.
BASIC INFO FOR EXPEDITED PERMIT RENEWAL
Does permit need Daily Max NH3 limits?
Already present in permit
Does permit need TRC limits/footnote?
Already present in permit
Does permit have toxicity testing?
No
Does permit have any Special Conditions?
Yes, nutrient reopener for High Rock Lake
Does permit have instream monitoring?
Yes, Upstream and Downstream for temperature and DO
New expiration date:
May 31, 2029
Facility Summary
Quail Run MHP Pads LLC operates a minor (flow < 1 MGD) wastewater facility to serves a Mobile Home
Park of about 100 residents. Quail Run Mobile Home Park's WWTP treats 100% domestic wastewater and
has a design capacity and permitted flow of 0.017 MGD. The WWTP was originally permitted in 1987.
This facility utilizes the following treatment components:
• Two 3,200-gallon septic tanks
• 4,000-gallon septic tank
• Two 4,500-gallon septic tanks
• 8,400-gallon recirculating dosing tank
• 4,250 ftz recirculating surface sand filter
• Tablet chlorinator
• 350-gallon chlorine contact tank
• De -chlorination contact tank*
*observed by WSRO staff at recent inspection but not listed on previous component list.
Fact Sheet for Permit Renewal
April 2024 - NPDES Permit NCO070033 - Page 1

Renewal Summary
This renewal contains the following changes:
• Updated Section A. (3.) to reflect current federal requirements for Electronic Reporting of
Discharge Monitoring Reports.
• Updated outfall map
• Updated winter ammonia limits per NCAC 2B .0404(c) — Winter limits can be no less stringent
than 2 times the summer limits. New winter ammonia limits will go into effect January 1, 2029.
Compliance History
Looking through the past 5 years (since 2019), this facility has received 8 NOVs and 3 NODs. 5 out of the 8
NOVs were due to an exceedance of Fecal Coliform.
The most recent inspection (performed June 2023) found that the facility was taking upstream samples in an
UT, instead of the permitted 100ft upstream of the outfall. There were also observations of ponding in the
sand filter; as well as discrepancies in the 5 septic tank locations, and use of the chlorination and
dechlorination systems.
Comments on Draft Permit
Fact Sheet for Permit Renewal
April 2024 - NPDES Permit NC0070033 - Page 2

IWC Calculations
Facility: Quail Run Mobile Home Park
Permit No.: NC0070033
Prepared By: Catherine Shadwell
Enter Design Flow (MGD): 0.017 <= Permitted Flow if Different from Design
Enter s7Q10 (cfs): 0.2
Enter w7Q10 (cfs): 0.4
Total Residual Chlorine (TRC)
Ammonia (Summer)
Daily Maximum Limit (ug/1)
Monthly Average Limit (mg NH3-N/1)
Design Permitted
Design Permitted
s7Q10 (CFS)
0.2
s7Q10 (CFS)
0.2
DESIGN FLOW (MGD)
0.017 €
DESIGN FLOW (MGD)
0.017 €
DESIGN FLOW (CFS)
0.02635
DESIGN FLOW (CFS)
0.02635
STREAM STD (UG/L)
17.0
STREAM STD (MG/L)
1.0
Upstream Bkgd (ug/1)
0
Upstream Bkgd (mg/1)
0.22
IWC (%)
11.64
IWC (%)
11.64
Allowable Conc. (ug/1)
146
Allowable Conc. (mg/1)
6.9
Ammonia (Winter)
Monthly Average Limit (mg NH3-N/1)
Design Permitted
Design Permitted
Fecal Coliform
w7Q10 (CFS)
0.4
Monthly Average Limit:
200/100mi € #VALUE!
DESIGN FLOW (MGD)
0.017
(If DF >331; Monitor)
DESIGN FLOW (CFS)
0.02635
(If DF<331; Limit)
STREAM STD (MG/L)
1.8
Dilution Factor (DF)
8.59 #VALUE!
Upstream Bkgd (mg/1)
0.22
IWC (%)
6.18
Allowable Conc. (mg/1)
25.8
*2B .0404 (c) Applies
Total Residual Chlorine
1. Cap Daily Max limit at 28 ug/I to protect for acute toxicity
Ammonia (as NH3-N)
1. If Allowable Conc > 35 mg/l, Monitor Only
2. Monthly Avg limit x 3 = Weekly Avg limit (Municipals)
3. Monthly Avg limit x 5 = Daily Max limit (Non-Munis)
If the allowable ammonia concentration is > 35 mg/L, no limit shall be imposed
By Policy dischargers < 1 MGD get limits no lower than 2 & 4 due to BAT
* From 2B .0404(c) - Winter Limits can be no less stringent than 2 times the summer limits
Fecal Coliform
1. Monthly Avg limit x 2 = 400/100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non -Muni)