NCG550250_Staff Report_19930630

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SOC PRIORITY PROJECT: Yes No
If Yes , SOC No.
To: Permits and Engineering Unit
Water Quality Section e 03-0l-
Attention: Mack Wiggins
ULT 1At7\Lti3-
Date: June 30 , 1993
NPDES STAFF REPORT AND RECOMMENDATION
County Davie _____ --
Permit No. NC0057851
NCG55o ZSo
PART I - GENERAL INFORMATION
1. Facility and Address : Irving J. Myers Residence
Rt. 2, Box 348
Mocksville, NC 27028
2. Date of Investigation June 30 , 1993
3 . Report Prepared by: Frank R. Lassiter
4. Persons Contacted and Telephone Number: Mr. Irving J. Myers
(919) 998-6268
Not Contacted
5 . Directions to Site: From WSRO, follow I-40 south across the
Yadkin River into Davie County. Take the 801 exit off of
I-40 to the right and follow to Spillman Road (SR1458) on
the right. The property is located approx. 0 . 65 mile down
SR1458 on the right. Myers residence is a trailer located
down a long gravel road (see enclosed hand drawn map) .
6 . Discharge Points (s) , List for all discharge points:
Latitude: 36° 01' 39" Longitude: 80° 29 ' 51"
U. S.G. S . Quad No. C17SW U. S.G. S. Quad Name Clemmons
7 . Sit size and expansion area consistent with application ?
Yes No If No, explain:
8 . Topography (relationship to flood plain included) :
The ground slopes moderately to the North-North-East. All
surface water will flow in this direction.
9 . Location of nearest dwelling:
2 within 300 feet. 10 t �`

10 . Receiving stream or affected surface waters: tUT ..Yadkin River
a. Classification: WS-IV p�
b. River Basin and Subbasin No. : Yadkin Rivera3 0 -"9q
c. Describe receiving stream features and pertinent
downstream uses: The city of Winston-Salem has a water
supply intake on the Yadkin River approximately 9 . 25
miles downstream.
Part II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of Wastewater to be permitted: . 00045 MGD
(Ultimate Design Capacity)
b. What is the current permitted capacity of the Waste
Water Treatment facility? . 00045 MGD
c. Actual treatment capacity of the current facility
(current design capacity) ? . 00045 MGD
d. Date (s) and construction activities allowed by previous
Authorizations to Construct issued in the previous two
years. N/A
e. Please provide a description of existing or
substantially constructed wastewater treatment
facilities ; As reported in previous reports , the system
consists of a 1000 gallon capacity septic tank, a 396
square foot sand filter, a 198 square foot sand filter,
a tablet chlorinator with contact tank, and step
aeration.
f. Please provide a description of proposed wastewater
treatment facilities. N/A
g. Possible toxic impacts to surface waters: N/A
h. Pretreatment Program (POTWs only) : N/A
2. Residuals handling and utilization/disposal scheme: -
a. If residuals are being land applied, please specify DEM
Permit No.
Residuals Contractor
Telephone No.
b. Residuals stabilization: PSRP PFRP
Other
NPDES Permit Staff Report
Version 10/92
Page 2

•
c. Landfill:
d. Other disposal/utilization scheme (Specify) : When
necessary pumped septage is hauled to a treatment
facility.
3. Treatment plant classification (attach completed rating
sheet) . N/A, SFR
4. SIC Code (s) : 4952
Primary 04 Secondary
Main Treatment Unit Code: 4 6 0 X 7
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant
Funds or are any public monies involved. (municipals only) ?
N/A
2. Special monitoring or limitations (including toxicity)
requests: N/A
3. Important SOC, JOC or Compliance Schedule dates: (Please
indicate) N/A
4. Alternative Analysis Evaluation: Has the facility evaluated
all of the non-discharge options available. Please provide
regional perspective for each option evaluated.
Spray Irrigation: Likely not enough land.
Connection to Regional Sewer System: Not an option.
Subsurface: Likely unsuitable soils
Other disposal options:
5 . Other Special Items: N/A
NPDES Permit Staff Report
Version 10/92
Page 3

PART IV - EVALUATION AND RECOMMENDATIONS
On the day of the inspection the system was doing well.
There was no detectable odor. There were no visible solids in
the stream. There were tablets in the chlorinator.
This application is for renewal of a single family residence
sandfilter permit. The site investigation, performed on June
30 , 1993 , determined the outfall was to an unnamed tributary of
Yadkin River. Since this discharge is a SFR with a small flow
and no visible adverse effects on the stream, this office does
not object to the reissuance of this permit.
6 7- ?-73
Lfivironmental Technician IV Date
7- 7- 93
Water Quality Regional Supervisor Date
•
NPDES Permit Staff Report
Version 10/92
Page 4

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A. (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Final
During the NPDES No. NC0057851
period beginning on the effective date of the Permit
Permittee is authorized to dischargeand last
limited and monitored from outfall(s) serial number(s) 001. Such until exiles shalla, the
by the Permittee as specified below: discharges be
Effluent Characteristics
Discharge Limitations
Monitoring ReQniremen ss
Lbs Other Units (Specify) Measurement
Monthly AvA Meekly Avo Monthl➢ Avg. Weekly Avg. ale !Amp"!
'low Fr�cv Location
OD, 5Day, 20 Degrees C 450 GPD
btal Suspended Residue 15.0 mg/1 22.5 mg/1
H3 as N 30.0 mg/1 45.0 mg/1
issolved Oxygen (minimum) 5.0 mg/1 7.5 mg/1
ecal Coliform (geometric mean) 6.0 mg/1 6.0 mg/1
otal Residual Chlorine 1000.0/100 ml 2000.0/100 ml
•
emperature
The chlorinator shall be inspected weekly to ensure there is an ample supply 1 of chlorine tablets for
continuous disinfection of the effluent.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
There shall be no discharge of floating solids or visible foam in other than trace amounts.