NC0066362_Wasteload Allocation_19960630

NPDES DOCUMENT SCANNING COVER SHEET
NC0066362
Benson Apartments WWTP
NPDES Permit:
Document Type:
Permit Issuance
6asteload Allocation's
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
June 30, 1996
This document is priatecl oa reuse paper - ignore aay
content on. the reirerse side

Staff Review and Evaluation
NPDES Wastewater Permit
FACILITY INFORMATION
Facility Benson Apts. WWTP
NPDES No. NC0066362
Design Flow (MGD) 0.008
Facility Class II
STREAM CHARACTERISTICS
Stream Name UT Mud Creek
Stream Class C
Sub -basin 040302
Drainage Area (mil) 0.21
S7Q10 (cfs) 0.07
W7Q10 (cfs) 0.1
30Q2 (cfs)
IWC (%) 15
Proposed Changes
Parameters Affected
Basis for change(s)
monitoring frequencies
BOD5,TSS,NH3-
N,Fecal,TRC,Temp
2B .0500's
Compliance Schedule:
Special Condition(s):
Permits Sr Engineering Comments:
This permit is being renewed with existing limits. Monitoring frequencies will change based on
Class II facility. Special condition language regarding the feasibility of connection to a POTW
will be added to the permit. No other changes are recommended by P&E. Facility has had one
TSS violation during the past year. No instream monitoring is required at this facility.
Prepared by: Susan A. Wilson
Regional Office Evaluation and Recommendations:
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A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS SUMMER (April 1 - October 31) Permit No. NC0066362
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 001. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Flow
BOD, 5 day, 20°C
Total Suspended Residue
NH3 as N
Fecal Coliform (geometric mean)
Total Residual Chlorine
Temperature
Discharge limitations
Monthly Avg.
0.0080 MGD
30.0 mg/I
30.0 mg/I
5.4 mg/I
200.0 /100 ml
Weekly Avg.
Daily Max
45.0 mg/I
45.0 mg/I
400.0 /100 ml
Monitoring
Measurement
Frequency
Weekly
Weekly
Weekly
Weekly
Weekly
2/Week
Weekly
Requirements
Sample
Type
Instantaneous
Grab
Grab
Grab
Grab
Grab
Grab
'Sample
Location
I or E
E
E
E
E
E
E
* Sample locations: E - Effluent, I - Influent
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored weekly at the effluent by grab
sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS WINTER (November 1 - March 31) Permit No. NC0066362
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 001. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics Discharge Limitations Monitoring
Measurement
Monthly Avg.
Flow 0.0080 MGD
BOD, 5 day, 20°C 30.0 mg/I
Total Suspended Residue 30.0 mg/I
NH3asN 14.5 mg/I
Fecal Coliform (geometric mean) 200.0 /100 ml
Total Residual Chlorine
Temperature
* Sample locations: E - Effluent, 1 - Influent
Weekly Avg, Daily Max
Frequency
Weekly
45.0 mg/I Weekly
45.0 mg/I Weekly
Weekly
400.0 /100 mi Weekly
2/Week
Weekly
Requirements
Sample *Sample
Tyne Location
Instantaneous I or E
Grab E
Grab E
Grab E
Grab E
Grab E
Grab E
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored weekly at the effluent by grab
sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

SOC PRIORITY PROJECT: No
IF YES.,, SOC NUMBER
TO: PERMITS AND ENGINEERING UNIT
WATER QUALITY SECTION
ATTENTION: Susan Wilson
DATE: January 16, 1996;
NPDES STAFF REPORT AND RECOMMENDATION
COUNTY Henderson
PERMIT NUMBER NC0066362
PART I - GENERAL INFORMATION
1. Facility and Address: Benson Apts.
145 Brookside Camp Rd.
Hendersonville, NC 28792
2. Date of Investigation: January 16, 1996
3. Report Prepared By: Paul White
4. Persons Contacted and Telephone Number: Nathan Benson
704-693-5493
5. Directions to Site: Turn east at intersection of
Brookside Camp Road and Hwy 25 south of Mountain Home.
Cross RR track and the apts. are 0.2 mile on the left.
WWTP is in white bldg. behind apts.
6. Discharge Point(s), List for all discharge points:
Latitude: 35° 21' 54"
Longitude: 82° 28' 54"
Attach a USGS map extract and indicate treatment facility site and
discharge point on map.
U.S.G.S. Quad No. Hendersonville U.S.G.S. Quad Name F9SW
7. Site size and expansion area consistent with application?
X Yes No If No, explain:
8. Topography (relationship to flood plain included): Slopes 10%+/-.
Discharges to unnamed tributary to Mud Creek. Not in flood plain.
9. Location of nearest dwelling: Apts. are <100 feet away.
Page 1 .

10. Receiving stream or affected surface waters:
UT Mud Creek
a. Classification: C
b. River Basin and Subbasin No.: French Broad 04-03-02
c. Describe receiving stream features and pertinent downstream
uses: Gradient approx. 80 feet/mile to Mud Creek. Drains
residential and commercial area along Hwy 25. Primary
downstream usage is agricultural.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted 0.008 MGD (Ultimate
Design Capacity)
b. What is the current permitted capacity of the Wastewater
Treatment facility? 0.008 mgd
c. Actual treatment capacity of the current facility (current
design capacity 0.008 mgd
d. Date(s) and construction activities allowed by previous
Authorizations to Construct issued in the previous two years:
none
e. Please provide a description of existing or substantially
constructed wastewater treatment facilities: Existing
facilities consist of aeration, clarification, sludge return,
skimmer, tablet chlorinator, effluent pump station (serves
as chlorine contact tank), force main outfall line to stream.
Facility is located inside a building.
f. Please provide a description of proposed wastewater treatment
facilities: n/a
g-
Possible toxic impacts to surface waters: chlorine, ammonia,
cleaning agents.
h. Pretreatment Program (POTWs only): n/a
in development approved
should be required not needed
2. Residuals handling and utilization/disposal scheme: solids pumped
by septage hauler to POTW.
a. If residuals are being land applied, please specify DEM
Permit Number n/a
Residuals Contractor
Telephone Number
Page 2

b. Residuals stabilization: PSRP PFRP OTHER
C. Landfill:
d. Other disposal/utilization scheme (Specify) :
3. Treatment plant classification (attach completed rating sheet): II
4. SIC Codes (s) : 4952
Primary 07 Secondary
Main Treatment Unit Code: 060 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
Submission of Plans and Specifications
Begin Construction
Complete Construction
Date
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: could be feasible on local land
Connection to Regional Sewer System: There is a proposed force
main to be constructed down Hwy 25 connecting to the City of
Hendersonville in 1996. The distance from the apts. would be
<1000 feet, however, boring under a RR track would be necessary.
The feasibility of connecting to this force main should be
investigated when it becomes available.
Subsurface: not likely to be feasible
Other disposal options:
5. Other Special Items:
Page 3

PART IV - EVALUATION AND RECOMMENDATIONS
It is recommended that the permit be renewed as requested. The permit
should contain standard language requiring investigating the
feasibility of connecting to a POTW when this becomes available.
Rayilue)
Signature of Report Preparer
t t g fie
Water Quality Regional Supervisor
ge /4//514
Page 4

RATING SCALE FOR CLASSIFICATION OF WATER POLLUTION CONTROL SYSTEMS
Name of Facility: `� d' �$
Owner or Contact Person: yi-ai/ti Z �vSd
Mailing Address: 04 S Pi WAf/be C,¢itfl PP/ ijicil 5a'l'j , ,VC 28-P'r -
County: f%Dc'l2Sax/ Telephone: `74, 4 - 6q3— 54V
Present Classification: New Facility Existing Facility V
NPDES Per. No. NC00 GC 3 Nondisc. Per. No.WQ Health Dept.Per No.
Rated by: ptu L (A/gib -re Telephone: Z,4-A3/-6?-0'( Date: /—f r-9
Reviewed by: Health Dept.
0-erC. frkifirgAALL Regional Office
Central Office
ORC: GAY W/15z' / Grade:
Check Classification(s): Subsurface
Wastewater Classification: (Circle One) i
Spray Irrigation
Ill IV
Telephone:
Telephone: 704/ 21i-6 iDg
Telephone:
_Telephone: 704 .Z 54i- -WO
Land Application
Total Points:
IN -PLANT PROCESSES AND RELATED CONTROL ECUIPMFNT WHCH ARE AN INTEGRAL RLL F INDUSTRIAL PRODUCTION SHALL NOT BE
CONSIDERED WASTE TREATMENT FOR THE PURPOSE OF CIASSiFICATION. ALSO SEPTIC TANK SYSTEMS CONSISTING ONLY OF SEPTIC TANK
AND GRAVITY MTR1FICATION LINESARE EXEMPT FROM_CLAMPC,STra
SUBSURFACE CLASSIFICATION
(check all units that apply)
1. septic tanks
2. pump tanks
3. siphon or pump -dosing systems
4sand filters
5. grease trap/interceptor
6oil/water separators
7, gravity subsurface treatment and disposal:
8. pressure subsurface treatment and disposal:
SPRAY IRRIGATION CLASSIFICATION
(check all units that apply)
1. preliminary treatment (definition no. 32 )
2. lagoons
3. septic tanks
4. pump tanks
5. pumps
6 sand filters
7. grease trap/interceptor
8. oil/water separators
9, disinfection
10. chemical addition for nutrient/algae control
11. spray Irrigation of wastewater
In addition to the • above classifications, pretreatment of wastewater In excess of these components shall
be rated using the point rating system and will require an operator with an appropriate dual certification.
LAND APPLICATiON/RESIDUALS CLASSIFICATION (Applies only to permit holder)
1. Land application of biosolids, residuals or contaminated soils on a designated site.
WASTEWATER TREATMENT FACILITY CLASSIFICATION
The following systems shall be assigned a Class I classification, unless the flow is of a significant quantity or the technology Is unusually
complex. to require consideration by the Commission on a case -by -case basis: (Check H Appropriate)
1. Oil/water Separator Systems consisting only of physical separation. pumps and disposal;
2_ Septic Tank/Sand Filter Systems consisting only of septic tanks. dosing apparatus, pumps,sand fillers. disinfection
and direct discharge;
3. Lagoon Systems consisting only of preliminary treatment. lagoons. pumps, disinfection. necessary chemical treatment for
algae or nutrient control, and direct discharge;
4. Closed -loop Recycle Systems;
5, _ Groundwater Remediation Systems consisting only of otVwater separators, pumps, air -stripping, carbon adsorption, disinfedion
and disposal;
6. Aquaculture operations with discharge to surface waters;
7_ Water Plant sludge handling and back -wash water treatment;
8. Seafood processing consisting of screening and disposal.
9. Single-family discharging systems, with the exception of Aerobic Treatment Units, wilt be dassitied H permitted alter July 1.
1993 or if upon inspodion by tho Division. it is found that the system is not being adequately operated or maintained. Such
systems will be notified of the classification or reclassification by the Commission. In writing.

The following scale is used for rating wastewater treatment facilities: (circle appropriate points)
ITEM
POINTS
(1) Industrial Pretreatment Units or Industrial Pretreatment Program (see definition No. 33) 4
(2) DESIGN FLOW OF PLANT IN gpd (not applicable to non•contaminatod cooling waters. sludge handling tacitities for
water purification plants. totally closed cycle systems(soe definition No. 11). and facilities consisting only of hem
(4)(d) or Items (4)(d) and (11)(d)]
0 - 20.000
20.001 - 50.000
50.001 - 100.000
100.001 - 250.000
250.001 - 500.000
500.001 - 1.000.000 .8
1.000.001 - 2.000.000 10
2.000.001 (and up) rate 1 point additional for each 200.003 gpd capacity up to a maximum of ..........N3 0
Design Flow (gpd)
(3) PRELIMINARY UNITS/PROCESSES (see definition No.32)
(a) Bar Screens
or
(b) Mechanical Screens. Static Screens or Comminuting Devices 2
(c) Grit Removal 1
or
(d) Mechanical or Aerated Grit Removal
(o) Flow Measuring Device
or
(i) Instrumented Flow Measurement 2
(g) Preaeratlon 2
(h) influent Flow Equalization 2
(I) Grease or Oil Separators - Gravity 2
Mechanical. 3
Dissolved Air Flotation B
(J) ' Prechlorination 5
(4) PRIMARY TREATMENT WITS/PROCESSES
(a) Septic Tank (see definitbn No. 43) .» 2
(b) Imhoff Tank. .5
(c) Primary Clarifiers .5
(d) Settling Ponds or Settling Tanks tor Inorganic Non -toxic Materials (sludge handling facilities for water
purification plants. sand. gravel. stone. and other mining operations except recreational activities such as gem
or gold mining) 2
(5) SECONDARYTREA- Meg U ITSPPAOCFSSES
(a) Carbonaceous Stage
(I) Aeration -High Purity Oxygen System................
Diffused Alr System
Mechanical Air System (fixed. floating or rotor)
Separate Sludge Reaeratlon ... 3
(11) Trickling Filer
High Rate .......N. 7
Standard Rate ..»...».N...N...»»»». .5
Packed Tower .5
(111) Biological Aerated Filter or Aerated Biological Flher»».»»»...N.NN....... N.»...N»N.NNN.NN.»».1 0
(tv) Aerated Lagoons 10
(v) Rotating Biological Contactors ....»..- 10
(vl) Sand Festers -Intermittent blologlcal»...........N»»....... 2
Recirculating biological 3
(v11) Stabfllzalbn Lagoons .................».
(vlil) Clar><ior....... ...
(Ix) Single stage system for combined carbonaceous removal of BOD and nitrogenous remov
nhrficaton (see definition No. 12)(Polnts for Ws Hem have to be In addition to hems
(5)(a)(i) through (5)(a)(vill).
utilizing the extended aeration process (see definition No.3a)
utilizing other than the extended aeration process ...... ....... ..... »..... .....N............. »....».»...8
(x) Nutrient additions to enhance BOD removal. .».N. .5
(xl) Biological Culture (-Super Bugs')additbn 5
(b) Nitrogenous Stage I�
(I) Aeration High Purity Oxygen System...................N.......N....................NN...20
Diffused AlNNN»»N»»N»
r System »........»»..»....................................................i 0
Mechanical Alr System (fixed. floating or rotor)....»...»...».,.N...N........»...»...N..N. .8
Separate Sludge Reaerallon»»........ 3
(II) Trickling Filter -High Rate .»»».»N....N.»...». ». 7
Standard Rato......»..... ».........».N.» 5
Packed Tower 5
(111) Biological Aerated Filter or Aerated Biological fllter:»N......N..... N».»...N».N...N»......N».»».N.10
(Iv) Rotating Biological Contactors N». .» 10
(v) Sand Filter - Intermittent biological »......N....N...... 2
Recirculating biological N. 3
(v1) Clarifier .» .» .5
(6) TERTIARY OR ADVANCED TREATMENT (NITSIPROCESSES
(a) Activated Carbon Beds -
without carbon regeneration. ......... ».»NN...— ......... .5
with carbon regeneration ». 15
(b) Powdered or Granular Activated Carbon Feed -
without carbon regeneration .5
vtth carbon regeneration N. 15
(c) Alr stripping S
(d) Denhrflcatlon Process 10
(e) Electrodlalysls .» .5
(I) Foam Separation ». .5
(g) lon Exchange -5
(h) Land Application of Treated Effluent (see definition No. 22b) (not applicable for sand. gravel. stone
and other similar mining operations) by high rate infilttalion. 4
(I) Microscreons S
(1) Phosphorous Removal by Biological Processes (See definition No. 26) .20
(k) Polishing Ponds - without aeration 2
whir aeration .5
2
.3
4
5
1

•
(1) Post Aeration - cascade 0
diffused or mechanical 2
(m) Rovers( Osmosis 5
(n) Sand or Mixed -Media Filters - low rate 2
high rate 5
(o) Treatment processes for removal of metal or cyanide 15
(p) treatment processes for removal of toxic materials other than metal or cyanide ....I5
(7) SLUDGE TREATMENT 10
(a) Sludge Digestion Tank - Heated (anaerobic) 5
Aerobic .3
Unhealed (anaerobic) .3
(b) Sludge Stabilization (chemical or thermal) 2
(c) Sludge Drying Beds • Gravity 2
Vacuum Assisted 5
(d) Sludge Elutriatlon .5
(e) Sludge Conditioner (chemical or thermal) .5
(1) Sludge Thickener (gravity) »
(g) Dissolved Air Flotation Unit (not applicable to a unit rated as (3)(1)) 5
.... .8
(h) Sludge Gas Utilization (including gas storage) .5
(1) Sludge Hotdtng Tank - Aerated 2
Norraerated
()) Sludge Incinerator (not tnctudtng activated carbon regeneration) ....10
(k) Vacuum Fitter. Centrifuge. or Filter Press or other similar dewatertng devices............•..»......»»•-.»••-•»_10
(8) RESIDUALS UTILIZATION/DISPOSAL (Including Incinerated ash)
(a) Lagoons
(b) Land Application (surface and subsurface) (see definition 22a)
by contracting to a land application operator or landfill operator who holds the land application permit
or landfill permit
(c) Dedicated Landtilt(burial) by the permittee of the wastewater treatment facility
OfCl7CM
(9) (a) Chlorination
(b) Dechtortnalton .5
(c) Ozone 5
(d) Radiation
(10) CHEMICAL ADDITION SYSTEM(S) ( see definition No. 9) (not applicable to chemical additions rated as hem (3)(j).
(5)(a)(xl). (6)(a), (6)(b). (7)(b). (7)(e). (9a). (9)(b) or (9)(c) 5 points each: 5
List 5
.5
5
2
5
(11) MISC13LANEWUS UNIT'SrPROCESSES
(a) Holding Ponds. Holding Tanks or Settling Ponds for Organic or Toxic Materials including wastes from mining
operations containing nitrogen or phosphorus compounds In amounts significantly greater than is common 4
for domestic wastewater
(b) Effluent Flow Equalization (not applicable to storage basins which are inherent to land application systems)—.2
(c) Stage Discharge (not applicable to storage basins Inherent In land application systems)»».»»...».—..—»».
d
Pumps
(e) Stand -By Power Supply
(1) Thermal Pollution Control Device
TOTAL POINTS ...
CIASSIFiCATiIt1
Class I (Ants
Class 11 £f..26-50 ants
Class tt 51-65 Points
Class N 66-Up Points
3
Facilities having a rating of one through four points, Inclusive, do not require a certified operator.
Facilities having an activated sludge process will be assigned a minimum classification of Class II.
Facilities having treatment processes for the removal of metal or cyanide will be assigned a minimum classification of Class II.
Facilities having treatment processes for the blotogtcal removal el phosphorus will be assigned a minimum classification of Class M.
.0004 DEFlNfTIONS
The following definitions shall apply throughout this Subchapter. The column -type beds used to this
(1) Activated Carbon Beds. A physlcaVchemical method for reducing soluble organic material from wastewater effluent;
method will have a lbw rate varying Irom two to eight gallons per minute per square tool and may be ehhor upttow or downflow carbon beds. Carbon may or
may not be regenerated on the wastewater treatment plant she;
(2) Aerated Lagoons. A basin In which all solids are maintained In suspension and by which biological oxidation or organic matter Is reduced through artificially
accelerated transfer of oxygen on a flow -through basis;
(3) Aeration. A process of bringing about intimate contact between air or Ngh purity oxygen In a liquid by spraying, aghatton or dlttuston;(3a) Extended
. Aeration. An activated sludge process utilizing a minimum hydraulic detention time of 16 hours. (4) Agriculturally managed site. Any she on which a crop Is produced. managed. and harvested (Crop tnctudes grasses. grains. trees. etc.);
(5) Air Stripping. A process by which the ammonium ion Is first converted to dissolved ammonia (pH adjustment) with the ammonia then released to the
atmosphere by physical means: or other similar processes which remove petroleum products such as benzene. toluene. and xylene;
(6) Carbon Regeneration. The regeneratton of exhausted carbon by the use of a furnace to provide extremely Ngh temperatures which volatilize and oxidize the
absorbed Impurities;
(7) Carbonaceous Stage. A stage of wastewater treatment designed to acNeve 'secondary' effluent limits;
(8) Centrifuge. A mechanical device to which centrifugal force Is used to separate solids from liquids or to separate liquids of different densi:las;
(9) Chemical Addhton Systems- The addition of chemical(s) to wastewater at an application point for purposes of improving solids removal. pH adjustment.
alkalinity control, etc.; the capability to experiment with different chemicals and different application polnts to achieve a specific result will be considered one
system; the capability to add chemical(s) to dual units will be rated as one system; capability to add a chomicaf at a different application points for different
purposes will result In the systems being rated as separate systems;
(10) Chemical Sludge Conditioning. The addition of a chemical compound such as lime. ionic chloride. or a polymer to wet sludge to coalesce the mass prior to
its appllcatton to a dewatertng device;
(11) Closed Cycle Systems. Use of holding ponds or holding tanks for containment of wastewater containing Inorganic. nontoxic male/fats from sand. gravel.
crushed stone or other similar operations. Such systems shall carry a maximum of two points regardless of pumping facilities or any other appurtenances:
(12) Combined flomovaf of Cn,tnnacoouc ROD aryl t •.,,venue Removal by Nitrillcalbn- A single stage system required to achieve permit ellluenl limns on BOO
and amrm�n+ •'�•�xmen - • 'me blotoatcal'•

! i ( •,,1••• ;� r r '` 1
..; . Jr ;
r.. 'II. ,1(1 :111.1jl' • .', .1' .'�i�j ;, •.•L! 1. 7'..:7' •('91�( (r r(,.�1: r..! .,• , .. r .
.),14 C.. 1 :. ' ./C f,I7..i ic•r.t; t'i! '. !(! f1:
• ; !•: , (15) Eloctrodlalysls. Process for removing ionized salts from water through rho use of Ion-soloctivo fon•exchango membranes: ,,
. tg.•i'1 • (t6) Filter Press. A process operated mechanically for partially dowaloring sludge; ,. • .
7:y} .:, (17} Foam Separation. Tho plamod frothing of wastewater or wastewater effluent as a moans of removing excessive amounts of detergent materials through
(41 other introduction of air In tho-lorm of line bubbles; also called foam fractionation; •'„•
•;'� ; ' (18) Grit Removal. The process of .removing grit and other heavy mineral matter from wastewater;
u (19) Imhoff Tank. A deep two story wastewater lank consisting of an upper sedimentation chamber and a lower sludge digestion chamber.
(20) Instrumented flow Measurement. A device which Indicates and records rate of flow; ,
;421) Ion Exchange. A chemical process in which ions from two different molecules are exchanged; . ,
y ''L.'/'• .•......•.,.,, . from
r 1 J ♦uY•. .,,� :.. f11: i:. h1J •.'1,f•,.' ,(, . , r/ •� �•.,•
{,.(22) Land appticatlon. j.. J., ,
(a) Sludge Disposal. A final sludge disposal method by which wat'sludge may be applied to land either by spraying on the surface or by subsurface injection
(" t' a chisel plow); applicable for es of sludge described in 1 t of this Rule!: p f- [. �p types it ( f 1 ' ,�,: ►•�;.;t :.•lift ;.•
• kit•of [i- Treated Effluent. The recess of rain treated•wastowaler onto, a land area or other methods of lication d wastewater onto a land area as a
d rat:• •e;•
:{bf P spraying f} application
h},;;� • moans of final disposal or treatment; ;' ' •, ,. ' ..; ',(I. ;,t i rf' . J•, r't • •, ( r)) c. �, t,.. ,.. ,.(.-i
• (•f . (23) Microscreen. A low speed. continuously back -washed. rotating drum titter operating under gravity conditions as a polishing method for removing
,Suspended solids from effluent; •i' �s :...�;:; ,• ! ,.: . v .. •,.
oi,; f,,(24) Nitrification Process. The biochemical conversion of unoxldized nfrogon (ammonia and organic nitrogen) to oxidized nitrogen (usually nitrate);
l,,(25) Nitrogenous Stage. A separate stage of wastewater treatment designed for the specific purpose of converting ammonia nitrogen to nitrate nitrogen;
l•; . (26) Phosphate Removal. Biological. ' The removal of phosphorus from wasteh�irater by an °sic/anoxic process designed to enhance luxury uptake of phosphorus
by the microorganisms;
tilt •_ " (27) Polishing Pond. A holding pond following secondary treatment with sufficient detention time to allow settling of finely suspended solids;
•••• (28) Post Aeration. Aeration following conventional secondary treatment units to Increase effluent O.O. or for any other purpose;
(29) Post Aeration. (Cascade) A polishing method by which dissolved oxygen is added to the effluent by a nonmechanical. gravity moans of lowing down a
• series of steps or weirs; The flow occurring across the steps or weirs moves in a fairly thin layer and the operation of the cascade requires no operator
adjustment; thus. zero points aro assigned even though this Is an essential step to meeting the limits of the discharge permit;
°•f(, . (30) Powdered to Granular Activated Carbon Feed.. A biophysical carbon process that utilizes biological activity and organic absorption by using powdered or
• granular activated carbon; Virgln or regenerated carbon is teed controlled into the system; •
,.;a : (31) Preaeratlon. A tank constructed to provide aeration prior to primary treatment;
(32) Preliminary Units. Unit operations In the treatment process. such as screening and comminution. that prepare the liquor for subsequent major operations;
(33) Industrial Pretreatment. , . -
• (a) Pre-treatment Unit. industrial. The conditioning of a waste at its source before discharge. to remove or to neutralize substances injurious to sewers and
• • • •• - • treatment processes or to effect a partial reduction In toad on the treatment process which is operated by the same governing body as the wastewater
treatment plant being rated;
b) Pre-treatment Program. Industrial - must be a State or EPA required program to receive points on the rating sheet;
(34) Primary Clarifiers- The first settling tanks through which wastewater Is passed Ina treatment works for the purpose of removing settleable and suspended
solids and BOD which is associated with the solids;
(35) Pumps. Ail influent. effluent and in -plait pumps; • 1 ,
(36) Radiation. Disinfection or sterilization process utilizing devices emitting ultraviolet or gamma rays;
(37) Reverse Osmosis. A treatment process In which a heavy contaminated liquidispressurized through a membrane forming nearly pure liquid Tree from
suspended solids;
(38) Rotating 8iological Contractors. A fixed biological growth process in which wastewater lbws through tanks In which a series of partially submerged circular
surfaces are rotated;;
•
•.
(39) Sand Filters: ,
(a) Intermittent Biological. Filtration of effiuore following septic tanks. lagoons. or some other treatment process in which further btodecomposhlon is
expected to produce desired effluents; Hydraulic loading rates on these lifter's are computed in gpdrac and have a resulting low gpmrsl (less than one);
b) Recirculating biological - thom sao type sand lifter as defined in Subparagraph (39) (a) of Oda Rule with the added capability to recycle effluent back
through the sand litter; `•
( t
(40) Sand or Mixed -Media Filters. A polishing process by which effluent limits are achieved through a further reduction of suspended solids; -
(a) low rate — gravity. hydraulically boded lifter with loading rates in the ono to three gpiNsf range; ' -
(b) high rate — a pressure. hydrau5caity loaded filter with loading rates, In the five gpm/sf range; At any rate. the loading rate will exceed three gpmisf;
(41) Secondary Clarifiers. A tank which Hollows the blobglcal unit of treatment plant and which has the purpose of removing sludges associated with the
biological treatment units;
(42) Separate Sludge Reaeratbn. A part of the contact stabilization process where the activated sludge is ttanslemed to a lank and aerated before returning h
(43) Septic Tank. - A single -Story settling lank In which settled sludge is In contact with the wastewater flowing through the tank; shall not be applicable for
septic tank systems serving single family residences having capacity of 2.000 gallons or less which discharge to a nhrificatbn flail;
(44) Sludge Digestion. The process by which organic or volatile matter and sludge is gasified. liquefied, mineralized or converted Into more stable organic matter
through the activity of living organisms, which includes aerated holding tanks;
(45) Sludge Drying Beds. An area or art comprising natural artificia
l layers of porous materials upon which digested sewage sludge Is dried by drainage and
evaporation; ; r:'.t. .,;•
(46) Sludge Elutdatlon. A process of sludge conditioning In which certain constituents are removed by successive washings with fresh water or plant effluent;
(47) Stodge Gas Utilization. The process of using sewage gas for the purpose of heating buildings. driving engines, etc.;
(48) Sludge Holding Tank (Aerated and Nonaerated). ' A tank utilized for small wastewater treatment plants not containing a digester in which sludge may be
kept fresh. and supernatant withdrawn prior to a drying method (i.e. sludge drying beds); This may be done by adding a small amount of air simply to keep the
sludge fresh. but not necessarily an amount that would be required to achieve stabilization of organic matter. A nonaorated tank would simply be used to ,
decant sludge prior to dewatering and would not allow long periods (several days of detention) without resulting odor problems;
(49) Sludge Incnerators. A furnace designed to bum sludge and to remove all moisture and combustible materials and reduce the sludge to a sterile ash;
(50) Sludge Stabilization (Chemical or Thermal). A process to make treated sludge less odorous and putrescble. and to reduce the pathogenic organism
content; This may be done by pH adjustment. chlorine dosing, or by heat treatment; • `' ` • • -
(51) Sludge Thickener. A type of sedimentation tank in which the sludge is permitted to settle and thicken through agitation and gravity;
(52) Stabilization Lagoon. A type of oxidation lagoon In which biological oxidation of organic matter Is effected by natural transfer of oxygen to the water from
air (not a polishing pond); : • •, • . ,
(53) Stand -By Power Supply. On she or portable electrical generating equipment; -
(54) Static Screens. A stationary screen designed to remove solids. including non -biodegradable particulate (heatable solids. suspended solids and 8O0
reduction) from municipal and industrial wastewater treatment systems; •
(55) Tertiary Treatment. A stage of treatment following secondary which Is prtmarity for the purpose of effluent polishing; A settling lagoon or sand or coal Wier
might be employed for this purpose; • .1.r ••
(56) Thermal Pollution Control Device. A device providing for the transfer of heat from a fluid flowing In tubes to another fluid outside the tubes. or vice versa;
or other means of regulating liquid temperatures;
(57) Thermal Sludge Conditioner. A conditioning process by which heat is added for a protracted period of time to improve the dewaterabllriy of sludge by the
solubiilzing and hydrauflztng of the smaller and more highly hydrated sludge particles;
(56) Toxic Materials. Those wastes or combination of wastes. Including disease -causing agents which after discharge and upon exposure. Ingestion. Inhalation
or asstmliation Into any organism. either directly from the environment or Indirectly by Ingestion through food dhafne. will cause death. disease. behavioral
abnormalities. cancer, genetic mutations. physiological malfunctions (Including malfunctions In reproduction) or physical deformations. in such organisms or their
oflsprtng; Toxic materials Include. by way of illustration and not timttatbn: lead. cadmium. chromium. mercury. vanadium. arsenic. zinc, ortha-Ntro-chlorobenzeno
(ONCB). polychlorinated blphenyts (PCBs) and dichlorodiphenyl trichloroethane (DDT); and any other materials that have or may hereafter be determined to have
toxic properties; ••
(59) Trickling Filter. A biological treatment unit consisting of a material such as broken stone or rock over which wastewater Is distributed; A high rate trickling
lifter Is ono which operated al between 10 and 30 mgd per acre. A low rale trickling lifter is ono which its designed to operate at one to four mgd per acre; .
(60) Trickling Filter (Packed Tower). A plug flow typo of operation In which wastewater flows down through successive layers of media or filtrate material; Orpanlc
material is removed oorrttnualiy by the alive biological fixed growth in each successive layer. This method may produce *secondary' quality effluents or may be
adapted to produce a nitrified effluent;
(3t) Vacuum Filter. Centrifuges. or Filter Presses. Devices which aro designed to remove excess water from either digested or undigested sludge prior to disposal
or further treatment.
to the contact basin;

r• N vy "nrw type of oporauon In which wastewater (lows down through su cesslveMayors o. rnodfa or Lora; �r.u.R+l. c'^a+ *r
material la removed corbktually by the adbe biological Ilxed growth M each successive Layer. This method may product -second Q"a+ry Mr'"""4 0' `^0r -
adapted to produce a nlullled effluent; ♦
oror f `.ac um Furuntwr. Treatment. Q .or• CenlrHupos• or Fitter presses, Devices which are desl ned to remove excess water loom saber d1 .rr'd w "^ "...
82°30'
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GEOLOGICAL SURVEY
ASHEVILLE IT MI.
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ROAD CLASSIFICATION
PRIMARY HIGHWAY
HARD SURFACE
LIGHT -DUTY ROAD, HARDOR
MPROVED SURFACE
SECONDARY HIGHWAY
HARD SURFACE r UNIMPROVED ROAD
Latitude 35°21'54" Longitude 82°28'54"
Map # F9SW Sub -basin 04-03-02
Stream Class C
Discharge Class
Receiving Stream
Design Q 0.008
UT Mud Creek
Permit expires
'ant
Mtl
ispos
SCALE 1:24 000
1 0 1 KILOMETER
CONTOUR INTERVAL 5 FEET