NCG550226_Staff Report_19921124

•
SOC PRIORITY PROJECT Yes No
If Yes, SOC No.
cc: Permits and Engineering
Technical Support Branch
County Health Dept.
Central Files
WSRO RECEIVED
To: Permits and Engineering Unit
Water Quality Section NOV 2 4 1992
Attention : Mack Wiggins
Date No v emb e r 19 . 1992 TECHNICAL SUPPORT BRANCH
NPDES STAFF REPORT AND RE ONMEM)AT I CN
County : Davidson '
Permit No . NCO-0-5-605-7-
JJCGsso
PART I - GENERAL INFOIMATICN
1 . Facility and Address : Mr . Jinmie R. Murdock Residence
Route 1 , Box 804
Thomasville , N.C. 27360
2 . Date of Investigation : November 12 , 1992
3 . Report Prepared by : Mike Mickey , Environmental Technician V
4 . Persons Contacted and Telephone Number :
Mr . Jimmy R. Murdock, ph (919) 475-0641
5 . Directions to Site : Take Hwy 109 south out of Winston-Salem
and then turn right onto Old Greensboro Road (SR 1798) .
Proceed to Turnpike Road (SR 1898) , turn left and the Murdock
SFR is at the end of the road on the left .
6. Discharge Point (s) , List for all discharge points :
Latitude : 35 ° 54 ' 03" Longitude : 80° 08 ' 50"
U. S .G. S . Quad No . D18NN U. S .G. S . Quad Name Midway
7 . Site size and expansion area consistent with application? NA
Yes No If No , explain :
8 . Topography ( relationship to flood plain included) : The lot
and sandfilter system are located adjacent to , but out of the
flood plain .

9 . Location of nearest dwelling : The Gary D. Eddigner Residence
(NC0058670) is located across the street from the Murdocks .
10. Receiving stream or affected surface waters : U.T. to Rich
Fork Creek.
a . Classification : C
b . River Basin and Subbasin No. : YAD-07
c . Describe receiving stream features and pertinent
downstream uses : The U.T. joins Rich Fork Creek
approximately 50 yards below Murdocks outfall . Mr .
Eddinger ' s sandfilter discharges into the U.T. some
100 yards above Murdock' s outfall .
PART II - DESCR I PT I Cni OF DISCHARGE AND TREATMENT WORKS
1 . a . Volume of Wastewater to be permitted : 0 . 0003 MD(Ultimate
Design Capacity)
b . What is the current permitted capacity of the Was to Water
Treatment facility? 300 gpd
c . Actual treatment capacity of the current facility
(current design capacity) ? 300 based on the A/C issued
2/ 16/84 .
d . Date( s) and construction activities allowed by previous
Authorizations to Construct issued in the previous two
years : NA
e . Please provide a description of existing or substantially
constructed wastewater treatment facilities : The
existing 300 gpd system consists of a 1000 gallon septic
tank, a 270 square foot subsurface sandfilter ,
chlorinator and contact tank and discharge pipe . There
is not a cascade aerator as specified in the A/C.
f. Please provide a description of proposed wastewater
treatment facilities : NA - existing
g . Possible toxic impacts to surface waters : None known .
h . Pretreatment Program (PGRWs only) : NA
NPDES Permit Staff Report
Version 10/92
Page 2

2 . Residuals handling and utilization/disposal scheme : Solids
are removed from the septic tank by local haulers for disposal
in the nearest POIW.
a . If residuals are being land applied , please specify DHvi
permit no .NA
Residuals Contractor NA
Telephone No . NA
b . Residuals stabilization : NA PSRP PFRP_
Other
c . Landfill : NA
d . Other disposal /utilization scheme (Specify) :
3 . Treatment plant classification (attach completed rating
sheet) : NA for SFR
4 . SIC Code( s) : 4952
Wastewater Code( s) :
Primary 04 Secondary
Main Treatment Unit Code : 4 4 0 X 7
PART III - OTHER PERTINENT INFOAVIATI(N
1 . Is this facility being constructed with Construction Grant
Funds or are any public monies involved . (municipals only)?
NA
2 . Special monitoring or limitations ( including toxicity)
requests : NA
3 . Important SOC, JOC or Compliance Schedule dates : (Please
indicate) NA
4 . Alternative Analysis Evaluation : Has the facility evaluated
all of the non-discharge options available . Please provide
regional perspective for each option evaluated . NA -
existing
Spray Irrigation :
Connection to Regional Sewer System:
Subsurface :
NPDES Permit Staff Report
Version 10/92
Page 3

Other disposal options :
5 . Other Special Items :
PART IV - EVALUATION AND RE CMVI11 TI CNS
Observations of the system on 11 - 12-92 did not reveal any
problems . It was relevant to note , however , that the trailer had
been removed so no discharge was occurring . The Murdocks are
replacing their present 1 -bedroom mobile home with a double wide .
The chlorine contact chamber is located downslope from the end of
the driveway . The discharge pipe is approximately 50 yards in
length and passes in front of the end of the gravel road and
empties into the U.T. just below the driveway across the street .
WSRO Recommends reissuance .
-
V-\;.kD.A.\'Nt.L ,
Signature of repor preparer
ater Quality Regio al Supervisor
? Z// Zv
Date
NPDES Permit Staff Report
Version 10/92
Page 4

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h°\ ° f` Mr. Jimmie R. Murdock Residence
,s'\ a ` NPDES Permit No. NC0056057 V
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574 575 10' 576 LEXINGTON 7 Ml. 577 • • INTERIOR--GEOLOGICAL SURVEY,RESTON,VIRGINIA-1987 800�
SALISBURY 24 MI. 578000mE

A. (1) . EFFLUENT LIMITATICt.S AND MONITORING REQUIREMEDTTS Final
During the period beginning on the effective date of the permit and lasting until expiration, the permittee is
authorized to discharge from outfall(s) serial number(s) 001. Such discharges shall be limited and monitored
by the permittee as specified below:
Effluent Characteristics Discharge Limitations Monitoring Requirements
Kg/day (lbs/day) Other Units (Specify) Measurement Sample *Sample
Monthly Avg. Weekly Avg. Monthly Avg. Weekly Avg. Frequency Location
Flora 300 4 GPp
BOD,5Day,20 C 30.0 mg/1 45.0 mg/1
Total Suspended Residue 30.0 mg/1 45.0 mg/1
NH3 as N
Dissolved Oxygen (minimm►) 6.0 mg/1 6.0 mg/1
Fecal Coliform (geanetric mean) 1000.0/100m1 2000.0/100ml
Residual Chlorine
Temperature
The chlorinator shall be inspected weekly to ensure there is an ample supply 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.
NC0056057