NC0066249_Wasteload Allocation_19950515

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A. c j. EFFLUENT NT LI,N11TATIONS AND MONITORING REQUIREMENTS FINAL Ncrmit No. NCO066249
hllrlU tilt; I)CI-IOCI bl;(Illllllllg' oil till; effective date of the perilllt and Iastlilb lllltll CXj)lI-iltlhll, 111C PCI'llllticc IN titithol"IZCll tU t11SCII,1I'k'C h-0111
0111ft11100 sc l-i,ll 111mil-K•1- 001. Such discharges shall 1-w limited and monitored by Ow pci-miiwe as I)elclw:
Effluent Characteristics
f= %-Jw
BOD. 5 day. 20°C
T otai Suspended Residue
H I-13 as N
t (.:c d Colifornn (geomeim mean)
i otal Residual Chlorine
Temperature
Discharge „_Limitations
Monthly Avg.
0.0065 MGD
30.0 mg/1
30.0 mg/l
�00.0 /100 nil
Weekly Avg.
Monitorinq
Requirements
Measurement
Sampie
'Sample
Daily Max
Frequency
Type
Location
Weekly
Instantaneous
1 or E
45.0 mg/1
2/Month
Grab
E
45.0 mg/I
2/Month
Grab
E
Monthly
Grab
E
•100 ) i100 nil
2/Mt;;.1h
Grlib
E.u.D
Daily
Grab
E
Wee-::,
Grab
E
r Sample 1,, atiuns: L - EtTILICllt, I - 11111uc11t, U - Upstrcalll above the clischarbc punt at Pennsylvania I:c.rid. 1) 1)(.)�vnstrca[11 below the;
discharge point at McDowell Road.
TIIC pl i Shall [lot lx: 1csS tha11 o.0 standw—d LmItS [101' yrcatcr tllMl 9.0 Stanch 'd units and shall lac ?/111u111h ,it t11c CHILIcrll by grab
sanll)le.
There shall be no discharge of floating solids or visible foam in other than truce amounts.

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GKEX88/MP
05/15/95
COMPLIANCE
EVALUATION ANALYSIS REPORT
PAGE 1
PERMIT--NC0066249
PIPE--001
REPORT
PERIOD:
9304-9403
LOC ---
E
FACILITY --COUNTRY
ACRES MOBILE HOME
PARK
DESIGN FLOW--
.0060
CLASS--2
LOCATION--ARDEN
REGION/COUNTY--01 HENDERSON
50050
00310
00530
00610
31616
50060
00010
00400
MONTH
Q/MGD
BOD
RES/TSS NH3+NH4-
FEC COLI
CHLORINE
TEMP
PH
LIMIT F
.0065
F 30.00
F 30.0
NOL
F 200.0
NOL
NOL
9.0 6.0
93/04
.0030
49.70F
142.OF
22.30
66.3
.300
16.00
6.9-6.8
93/05
.0030
23.20
22.3
2.12
LESSTHAN
.400
18.00
6.9-6.8
93/06
.0030
5.00
9.4
2.72
LESSTHAN
.400
22.00
6.9-6.8
93/07
.0030
4.60
5.3
1.33
LESSTHAN
.400
23.00
6.9-6.8
93/08
.0030
3.25
7.7
11.40
LESSTHAN
.400
23.00
6.8-6.7
93/09
.0030
3.00
3.5
.33
73.8
.400
22.00
6.9-6.7
93/10
.0030
3.20
2.0
.25
9.8
.400
19.00
6.7-6.6
93/11
.0030
2.55
1.6
.84
19.0
.400
13.00
6.6-6.5
93/12
.0030
4.80
1.1
10.00
3.0
.300
11.00
6.7-6.6
94/01
.0030
3.50
8.5
.48
4.4
.300
9.00
6.7-6.6
94/02
.0030
3.15
r 4.8.
.37
LESSTHAN
.400
10.20
6.7-6.5
94/03
.0030
5.40
5.0
11.65
16.7
.300
13.00
6.7-6.7
AVERAGE
.0030
9.27
17.7
5.31
27.5
.366
16.60
MAXIMUM
.0030
49.70
142.0
22.30
73.8
.400
23.00
6.900
MINIMUM
.0030
2.55
1.1
.25
LESSTHAN
.300
9.00
6.500
UNIT
MGD
MG/L
MG/L
MG/L
#/100ML
MG/L
DEG.0
SU

GKEX88/MP
05/02/95
COMPLIANCE
EVALUATION ANALYSIS REPORT
PAGE 1
PERMIT--NC0066249
PIPE--001
REPORT PERIOD:
9404-9503
LOC ---
E
FACILITY --COUNTRY
ACRES MOBILE
HOME
PARK
DESIGN FLOW--
.0060
CLASS--2
LOCATION--ARDEN
REGION/COUNTY--01
HENDERSON
50050
00310
00530
00610
31616
50060
00010
00400
MONTH
Q/MGD
BOD
RES/TSS
NH3+NH4-
FEC COLI
CHLORINE
TEMP
PH
LIMIT F
.0065
F 30.00 F
30.0
NOL
F 200.0
NOL
NOL
9.0 6.0
94/04
.0030
22.25
22.1
20.60
87.6
.300
15.00
6.8-6.7
94/05
.0030
28.90
52.4F
11.95
LESSTHAN
.400
18.00
6.8-6.7
94/06
.0027
8.85
48.7F
23.00
192.8
.400
23.40
7.2-7.0
94/07
.0021
5.05
2.7
15.00
8.4
.660
27.25
7.2-7.0
94/08
.0016
4.30
.0
16.00
1.0
1.000
25.00
7.1-6.8
94/09
.0019
2.60
3.0
15.00
LESSTHAN
1.000
23.00
7.4-6.8
94/10
.0016
6.80
5.5
17.00
LESSTHAN
1.200
18.25
8.3-7.4
94/11
.0017
28.00
17.5
.16
31.6
.700
16.50
7.1-6.5
94/12
.0011
42.80F
16.2
15.50
6.0
.750
15.00
7.1-6.8
95/01
.0018
18.50
8.2
3.50
3.0
.900
9.50
7.3-6.8
- 95/02
.0016
19.80
11.0
.00
3.G
.400
9.00
7.5-7.1
95/03
.0019
8.80
4.8
.00
1.0
.700
13.40
7.6-6.1
AVERAGE
.0020
16.38
16.0
11.47
37.1
.700
17.77
MAXIMUM
.0030
42.80
52.4
23.00
192.8
1.200
27.25
8.300
MINIMUM
.0011
2.60
.0
LESSTHAN
LESSTHAN
.300
9.00
6.100
UNIT
MGD
MG/L
MG/L
MG/L
#/100ML
MG/L
DEG.0
SU

SOC PRIORITY PROJECT: No
IF YES, SOC NUMBER
TO: PERMITS AND ENGINEERING UNIT
WATER QUALITY SECTION
ATTENTION: Mack Wiggins
DATE: March 9, 1995
NPDES STAFF REPORT AND RECOMMENDATION
COUNTY Henderson
PERMIT NUMBER NCO066249
PART I - GENERAL INFORMATION
1. Facility and Address: Country Acres Mobile Home Park
25 Keith Drive
Arden, NC 28704
2. Date of Investigation: February 27, 1995
3. Report Prepared By: Paul White
4. Persons Contacted and Telephone Number: Carolyn Edmundson
(not contacted) 704-891-3261
5. Directions to Site: From the intersection of SR 1349
(McDowell Creek Road) with Hwy 191 north of Mills River, go 1
mile to the intersection of SR 1348 (Pennsylvania Road) and
turn left. Go 0.1 mile to the first drive across McDowell
Creek and turn in to the left. Follow the drive past the
house to the wastewater treatment plant at the.back of the
trailer park.
6. Discharge Point(s), List for all discharge points:
Latitude: 350 25' 06" Longitude: 820 35' 30"
Attach a USGS map extract and indicate treatment facility site and
discharge point on map.
U.S.G.S. Quad No. F8 NE U.S.G.S. Quad Name Skyland
Page 1

7
W
Q
Im
Site size and expansion area consistent with application?
_X_ Yes No If No, explain:
Topography (relationship to flood plain included): Site is located
in geologic flood plain of McDowell Creek. It is not known if it
is in the 100 year flood plain.
Location of nearest dwelling: >100 feet
Receiving stream or affected surface waters: McDowell Creek
a. Classification: WS-IV
b. River Basin and Subbasin No.: French Broad 04-03-02
C. Describe receiving stream features and pertinent downstream
uses: Receiving stream is approximately 10 feet wide at this
point and drains rural agricultural land with small pastures
and woods. A summer youth facility 1.2 miles downstream
reportedly uses the stream for primary recreation. Other
uses include aquatic and wildlife propagation.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
3
a. Volume of wastewater to be permitted 0.006 MGD (Ultimate
Design Capacity)
b. What is the current permitted capacity of the Wastewater
Treatment facility? 0.0065 mgd (apparently inadvertently
changed from 0.006 mgd with the September 1, 1991 permit
renewal.)
C. Actual treatment capacity of the current facility (current
design capacity 0.006 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: Based on on site
measurements and the engineers certification, the existing
facility is a 0.006 mgd extended aeration treatment plant
consisting of aeration, clarification, sludge and skimmer
return, 1000 gallon septic tank for sludge holding, tablet
chlorinator, 125 gallon chlorine contact chamber, V-notch
weir, effluent pump station, and force main to McDowell
Creek.
Page 2

f. Please provide a description of proposed wastewater treatment
facilities: none
g.'- Possible toxic impacts to surface waters: chlorine, ammonia,
cleaning chemicals.
h. Pretreatment Program (POTWs only): n/a
in development approved
should be required not needed
2. Residuals handling and utilization/disposal scheme: septage hauler
to POTW
a. If residuals are being land applied, please specify DEM
Permit Number
Residuals Contractor
Telephone Number
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 08 Secondary
Main Treatment Unit Code: 0607
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds
or are any public monies involved. (municipals only)? no
2. Special monitoring or limitations (including toxicity) requests:
none
Page 3

3. Important SOC, JOC, or Compliance Schedule dates: (Please
indicate) n/a
Date
Submission of Plans and Specifications
Begin Construction
Complete Construction
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: might be technically feasible on adjacent land
Connection to Regional Sewer System: none available
Subsurface: might be technically feasible on adjacent land
Other disposal options:
5.
Other
Special Items:
none
PART
IV -
EVALUATION AND
RECOMMENDATIONS
On the last permit renewal September 1, 1991, the flow limit
was apparently listed in error as 0.0065 mgd. The supplement to
permit cover sheet refers to a 0.006 mgd plant. All other ARO
file correspondence previous to that time refers to 0.006 mgd,
with the exception of Part IV of the April 23, 1991 staff report
(Part II. 1. and 4. and the rating sheet of the same staff report
refers to 0.006 mgd) and the subsequent waste load allocation.
The plant was certified as a 0.006 mgd plant. The maximum
instantaneous flows reported on the DMRs for the previous 12
months is 3000 gpd.
Therefore the permit should be renewed at 0.006 mgd. A copy
of the application has been forwarded to Harold Saylor of the
Public Water Supply Section Regional Office in Black Mtn. Any
comments provided will be forwarded at that time.
Pot 40jcd
of Report Preparer
Water ality Regional Supervisor
Page 4

RATING SCALE FOR CLASSIFICATION OF WATER POLLUTION CONTROL SYSTEMS
Name of Facility: Cow'.-rry /fcg6..5 pw//F
Owner or Contact Person: _ C A30 L YP CabljUA11>56"
Mailing Address: 25 <61e-jl 0k. IJC- 70{"
County: _ i'-�G�lv f�C—?S o Telephone: 7a 4
Present Classification:_ New Facility Existing Facility_
NPDES Per. No. NC00 Nondisc. Per. No.WQ Health Dept.Per No.
Rated by: Pif-G!(- UJ917-C Telephone: 7011 ;Z51-6Date: 3— 6S
Reviewed by: Health Dept. Telephone:
Regional Office Telephone:101V- 51^6wz-
Central Office Telephone:
ORC:_ 0/39y Till &l > Grade: .]' Telephone: 76Y-- 64?-0o63
Check Classification(s): Subsurface Spray Irrigation Land Application
Wastewater Classification: (Circle One) I it III IV Total Points: 3
SUBSURFACE CLASSIFICATION
(check all units that apply)
1.__septic tanks
2. pump tanks
3. siphon or pump -dosing systems
4, _ _sand filters
5. grease trapfinterceptor
6_ oil/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 trapfinterceptor
8.
oiVwater separators
9L
_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, ems, 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 If Appropriate)
1. OiVwater 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 lifters, 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 oil/water separators, pumps, air -stripping, carbon adsorption, disinfection
and disposal;
6. Aquaculture operations with discharge to sudaoe 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, will be classified ii permitted after July 1,
1993 or if upon Inspection by the 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.

• Tile following scale is used for rating wastewater treatment facilities: (circle appropriate points)
REM POINTS
( 1 ) Industrial Pretreatment Units or Industrial Pretreatment Program (see delinhion No. 33)...................................................4
(2) DESIGN
FLOW OF PLANT IN gpd [not applicable to non -contaminated cooing waters. sludge handling facilities for
water purification plants. totally dosed cycle syslems(see 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.............................................................................................................. ...................2
..
100.001 - 250.000...................................................................................................................................4
250.001 - 500.000..................................................................................................................................5
500.001 - 1.000.000............................................................................................................................... A
1.000.001 - 2.000.000............ ... .. ......................................................... ..........................10
2.000.001 (and up) rate 1 point additional for each 200.000 gpd capacity up to a maximum of .................30
Design Flow (gpd)
(3) PRELIMINARY UNITS/PROCESSES (see definition No.32)
(a)
BarScreens................................ ....................................................................................................... 4
(b)
or
Mechanical Screens. Static Screens or Comminuting Devices..........................................................................2
(c)
Grit Removal..............................................................................................................................................1
(d)
or
Mechanical or Aerated Grit Removal......................................................................................................... 2
(a)
FlowMeasuring Device.........:................................................................................................................:p
(i)
or
Instrumented Flow Measurement. ..... .....................................................................................................2
(g)
Preaeratlon.............................. ..».............................................................................................................2
(h)
Influent Flow Equalization....................................................................................................................2
(i)
Grease or Oil Separators - Gravity ................ ...... .........................................................................................2
Mechanical................................».........................................................................................................--...3
DissolvedAir Flotation ................ ..... ........................................................................................................ 8
(1)
Prechlodnation...........................»....„......»..............................................................................................5
(4) PRUARYTREAiMENT LNffS/PROCESSES
(a)
Septic Tank (see definition No. 43)»........................................................................................................ 2
(b)
Imhoff Tank ............. »»»............ ....... ............. ............................................................................... .........
(c)
Primary Clarifiers. ..................... . ... . ...... . ..... . .......................................................................................... 5
(d)
Settling Ponds or Settling Tanks for Inorganic Nontoxic Materials (sludge handling facilities for water
purification plants. sand. gravel. stone. and other mining operations except recreatlorW activities such as gem
orgold mining) .......................... ....... ............. ....................................................................................... 2
(5) SECONDARY TREATMENT LINITSiPROCESSES
(a)
Carbonaceous Stage
(i) Aeration -High Purity Oxygen System...........................................................................
Diffused Air System . ... »........................................................................... .10
Mechanical Air System (fixed. floating or rotor) ............... »... ..... »............................ ..........
SeparateSludge Reaeratlon... .. .......................................................................................
(11) Tdclding Filter
HighRate...»»......»...»........................................................................................... 7
StandardRate »»..»»........... ....»....................................................................... .............. 5
PackedTower ......... .... ..................................................................................................5
(tit) Biological Aerated FRter or Aerated Biological Filter..».»............»».».....»............».............10
(iv) Aerated Lagoons ........ ........ ................................................ »....................................10
(v) Rotating Biokgical Contactors...........................................................................10
(VI) Sand Filters-Mtemtittent biological..................................................................................2
Recirculatingbiologtcal................................................................................................... 3
(vii) Stabilization Lagoons....................................................................................................
Zh
(vili) ClarNier........................................................................................................................
(Ix) Single stage system for combined carbonaceous removal of BOD and nitrogenous removal by
nitrification (see definition No. 12)(Points for this item have to be in addiction to hems
(5)(a)(1) through (5)(a)(vifl).
utilizing the extended aeration process (see definition No.3a)..........................................2
utfting other than the extended aeration process ......»...................................................8
(x) Nutrient additions to enhance BOD removal......................................................................5
(XI) Biological Culture ('Super Bugs')addition........................................................................5
(b)
Nitrogenous Stage
(I) Aeration - High Purity Oxygen System ................................. .......................................20
DiffusedAir System ..»............ ».....................................................................................10
Mechanical Air System (fixed. floating or rotor) .. ........ ..... ».,.»»...... ».................................. 8
SeparateSludge Reaeration............................................................................................3
(11) Tddding Filter High Rate...................................................................................................7
Standard Rate ..»».........................................................................................................5
PackedTower.. ...... ...... . ...................................................................5
(Ill) Biological Aerated Filter or Aerated Biological Filter .................... ...».................................... 10
(Iv) Rotating Biological Contactors......................................................................................10
(v) Sand Filter - Intermittent biological..................................................................................2
Recirculatingbiological....................................................................................................3
(v1) Ctarffier............ ..... .........................................................................................................
(6) TERTIARY OR ADVANCED TREATMENT UNRS4410CESSES
(a)
Activated Carbon Beds -
withoutcarbon regeneration................................................................................................. .5
withcarbonregeneration.......................................................................................................i s
(b)
Powdered or Granular Activated Carbon Feed -
,without carbon regeneration.................................................................................................5
.with carbon regeneration.....................................................................................................15
(c)
Air str%*ng...................................»..............»...................................................---...............................5
(d)
Denitdficatbn Process ................. ........ .................................................................................................... 10
(e)
Electrodialysis..................................................................................................................5
(f )
Foam Separation ....................... ................................................................................................................ 6
(g)
........................................................................................5
Ion Exchange ..............................................-
(h)
Land Application of Treated Effluent (see definition No. 22b) (not applicable for sand. gravel. stone
and other similar mining operations) by high rateInfiltration.........................................................................4
(1)
................. ..............--------.......................................... .5
Microscreens................. .. �
())
Phosphorous Removal by Biological Processes (See definition No. 26)........................................................20
(k)
Polishing Ponds - without aeration............................................................................................................2
withaeration .... ». ...........................................................................................................

y `
(I)
Post Aeration cascade. 0
diffused or mechanical.......................................................................................................2
(m)
Reverse Osmosis........................................................................................................................................5
(n)
Sand or Mixed -Media Filters - low rate..........................................................................................................2
highrate......................................................................5
(o)
Treatment processes for removal of metal or cyanide................................................................................... 15
( p )
treatment processes for removal of toxic materials other than metal or cyanide..............................................1 5
(7)
SLUDGE TREATMENT
(a)
Sludge Digestion Tank - Heated (anaerobic)...............................................................................................10
Aerobic..............................................................................................................................................5
Unheated(anaerobic)................................................................................................................................3
(b)
Sludge Stabilization (chemical or thermal)...................................................................................................5
(c)
Sludge Drying Beds - Gravity......................................................................................................................2
VacuumAssisted......................................................................................................................................5
(d)
Sludge Elutdation...................................................................:.................................................................5
(e)
Sludge Conditioner (chemical or thermal)...................................................................................................5
(1)
Sludge Thickener (gravity)............................................................................................. ...................5
(g)
Dissolved Air Flotation Unit [not applicable to a unit rated as (3)(1))............................................................8
(h)
Sludge Gas Utilization (including gas storage)....................................................................................... 2
:...............................................................................................
(1)
Sludge Holding Tank - Aerated ............... .0
Non-aerated............................................................................................................................................. 2
(j)
Sludge Incinerator (not Including activated carbon regeneration)................................................................1 0
(k)
Vacuum Filter. Centrifuge. or Filter Press or other similar dewatering devices..................................................10
(8)
RESIDUALS U TILIZATIOWDISPOSAL (including incinerated ash)
(a)
Lagoons ............ ....................... .. •...........................................................................................2
(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.••......................................................... 2
(c)
Dedicated Landfili(budal)bythe permitteeofthewastewatertreatmentfacility.......................... ..................
( 9)
(a)
Chlorination......................................................................................................................................
Chlorination
(b)
Dechlorination..-•.................................................................................................................................. ..�
(c)
Ozone .......................................................................................................................................................
(d)
Radiation..................................................................................................................................................
(10)
CHEMICAL ADDITION SYSTEM(S) ( see definition No. 9) [clot applicable to chemical addhlons rated as Item (3)(j).
(5)(a)(xi). (6)(a). (6)(b). (7)(b). (7)(e). (9a). (9)(b) or (9)(c) 5 points each:
List........
..............................................................................................................................
•...................................................................................................................................5
....................................................................................................................................5
.... .......................................................................................................................5
....
(11)
MISCELLANEOUS UNrrS/PROCESSES�
(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
fordomestic wastewater...........................................................................................................................A
(b)
Effluent Flow Equalization (not applicable to storage basins which are Inherent In land application systems).....2
{c)
Stage Discharge (not applicable to storage basins Inherent in land application systems).......».»».»»..........
(d)
Pumps............-.........................................................................»................................................. ..3
{e)
Stand -By Power Supply . ......................................................».........................................................-
(f)
Thermal Pollution Control Device.................................................................................................................3
TOTALPOINTS ........... ................................................ »............
ClassI........................................................................................................... 5-25 Points
ClassII.........................................................................................................26.50 Points
classIN......................................................................................................51-65 Points
classiv .......................................................................................................66-Up Points
Facilltles having a rating of one through four points. Inclusive, do not require a certified operator.
Fac€lities 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 11.
Facilities having treatment processes for the biological removal of phosphorus will be assigned a minimum classification of Class Ili.
MU DEFINITIONS
The following definitions shall apply throughout this Subchapter.
(1) Activated Carbon Beds. A phystcaVchemical method for reducing soluble organic material from wastewater effluent; The column -type beds used in this
method will have a flow rate varying from two to eight gallons per minute per square foot and may be effher upflow 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 high purity oxygen In a liquid by spraying. agitation or dHfuslon;(3a) Extended
Aeration. An activated sludge process utilizing a minimum hydraulic detention time of 18 hours.
(4) Agriculturally managed she. Any she on which a crop Is produced. managed. and harvested (Crop Includes grasses. grains. tress. 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 regeneration of exhausted carbon by the use of a furnace to provide extremely high temperatures which volatilize and oxidize the
absorbed Impurities;
(7) Carbonaceous Stage. A stage of wastewater treatment designed to achieve 'secondary' effluent limits;
(a) Centrifuge. A mechanical device In which centrifugal force Is used to separate solids from liquids or to separate liquids of different dens'r ias;
(9) Chemical Addition 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 points 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 chemical 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 Ilene. ferric chloride. or a polymer to wet sludge to coalesce the mass prior to
its application to a dewatedng device;
(11) Closed Cycle Systems. Use of holding ponds or holding tanks for containment of wastewater containing Inorganic. non-toxlc materials 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 Removal of Carbonaceous BOD and Nitrogenous Removal by Nitrification- A single stage system required to achieve permit effluent limits on BOD
and ammonia nhrnnnn within the same bloloolcal reactor.

(15) Electrodialysis. Process for removing Ionized sails from water through the use of ion -selective Ion -exchange membranes;
(16) Filter Press. A process operated mechanically for partially dewatering sludge-
(17) Foam Separation. The planned frothing of wastewater or wastewater effluent as a means of removing excessive amounts of detergent materials through
the introduction of air In the form of fine bubbles; also called foam fractionation;
(18) Grit Removal. The process of removing grit and other heavy mineral matter from wastewater;
(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;
(21) Ion Exchange. A chemical process in which ions from two different molecules are exchanged;
(22) Land application:
(a) Sludge Disposal. A final sludge disposal method by which wet sludge may be applied to land either by spraying on the surface or by subsurface injection
(i.e.. chisel plow); [not applicable for types of sludge described in (11) of this Rule);
(b) Treated Effluent. The process of spraying treated wastewater onto a land area or other methods of application of wastewater onto a land area as a
means of final disposal or treatment;
(23) Microscreen. A low speed. continuously back -washed. rotating drum filter operating under gravity conditions as a polishing method for removing
suspended solids from effluent;
(24) Nitrification Process. The biochemical conversion of unoxidized nitrogen (ammonia and organic nitrogen) to oxidized nitrogen (usually nitrate);
(25) Nitrogenous Stage. A separate stage of wastewater treatment designed for the specific purpose of converting ammonia nitrogen to nitrate nitrogen;
(26) Phosphate Removal. Biological. The removal of phosphorus from wastewater by an oxidanoxic process designed to enhance luxury uptake of phosphorus
by the microorganisms.
(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 D.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 means of flowing 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 are assigned even though this Is an essential step to meeting the limits of the discharge permit;
(30) Powdered to Granular Activated Carton Feed. A biophysical carbon process that utilizes biological activity and organic absorption by using powdered or
granular activated carbon; Virgin or regenerated carbon is food controlled Into the system;
(31) Pmasratbn. 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 bad 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 Clartfiers. The first settling tanks through which wastewater Is passed In a treatment works for the purpose of removing settleable and suspended
solids and BOD which Is associated with the solids;
(35) Pumps. All Influent. effluent and In -plant pumps;
(36) Radiation. Disinfection or sterilization process utilizing devices emitting ultraviolet or gamma rays;
(37) Reverse Osmosis. A treatment process In which a heavy contaminated Uquid Is pressurized through a membrane forming nearly pure liquid free from
suspended solids;
(38) Rotating Biological Contractors. A fixed biohgical growth process In which wastewater flows through tanks In which a series of partially submerged circular
surfaces are rotated;
(39) Sand Filters:
(a) Intermittent Biological. Filtration of effluent following septic tanks. lagoons. or some other treatment process In which further biodecomposhlon Is
expected to produce desired effluents; HydrauGe loading rates on these filters are computed in gpd/ac and have a resulting low gpm/sf (less than one);
b) Recirculating biological - the same type of sand filter as defined In Subparagraph (39) (a) of this Rule with the added capability to recycle effluent back
through the sand fitter,
(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 loaded filter with loading rates to the one to three gpm/st e;
(b) high rate -- a pressure. hydraulically loaded fi ter with loading rates In the five gpm/d range any rate. the loading rate will exceed three gprWal;
(41) Secondary Clarifiers. A tank which follows the biological 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 transferred to a tank and aerated before returning it
to the contact basin;
(43) Septic Tank A single -story settling tank 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 nitrification field;
(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 comprising natural or artificial layers of porous materials upon which digested sewage sludge Is dried by drainage and
evaporation;
(46) Sludge Elutdation. A process of sludge conditioning In which certain constituents are removed by successive washings with fresh water or plant effluent;
(47) Sludge Gas Utilization. The process of using sewage gas for the purpose of heating buildings. driving ongirfes, 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 nonaerated tank would simply be used to
decant sludge prior to dewaterinlg and would not allow long periods (several days of detention) without resulting odor problems;
(49) Sludge Incinerators. A furnace designed to bum sludge and to remove as 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 putrescbte. 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 biobgical 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 site or portable electrical generating equlpment;
(54) Static Screens. A stationary screen designed to remove solids. Including norrblodegradable particulate (!hatable solids. suspended solids and BOD
reduction) from municipal and Industrial wastewater treatment systems;
(55) Tertiary Treatment. A stage of treatment following secondary which is primarily for the purpose of effluent polishing; A settling lagoon or sand or coal fitter
might be employed for this purpose;
(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 dewaterablifty of sludge by the
solubliiztng and hydraullzing of the smaller and more highly hydrated sludge particles;
(58) Toxic Materials. Those wastes or combinations of wastes. Including disease -causing agents which after discharge and upon exposure. Ingestion. Inhalation
or assimilation into any organism. either directly from the environment or indirectly by Ingestion through food chains. will cause death. disease. behavioral
abnormalities. dancer. genetic mutations. physiological malfunctions (Including malfunctions in reproduction) or physical deformations. In such organisms or their
offspring; Toxic materials Include. by way of Illustration and not limitation: lead. cadmium. chromium. mercury. vanadium, arsenic, zinc. ortho-nitro-chlorobenzene
(ONCE). polychlorinated biphenyts (PCBs) and di tdorodfphenyl trichloroethane (DDT); and any other materials that have or may hereafter be determined to have
toxic properties;
(59) Trickling Rhor. A biological treatment unit consisting of a material such as broken stone or rock over whirl wastewater is distributed; A high rate trickling
lifter Is one which operated at between 10 and 30 mgd per acre. A low rate trickling filter Is one which Is designed to operate at one to four mgd per acre;
(60) Trickling Filter (Packed Tower). A plug flow type of operation In which wastewater flows down through successive layers of media or filtrate material; Organic
material Is removed continually by the active biological fixed growth In each successive layer. This method may produce 'secondary' quality effluent, or may be
adapted to produce a nhrifled effluent;
(61) Vacuum Filter. Centrifuges. or Fitter Presses. Devices which are deslgned to remove excess water from either digested or undigested sludge prior to disposal
or further treatment.