NC0060691_Wasteload Allocation_19961126

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CAPM4\CANDLE.PM4
NPDES
PERMITrl
D
OPTIONS
FOR MODIFICATION
TO
NPDES PERMIT NO. NC 0060691
ENGINEERING ANALYSIS
for
CANDLE CORPORATION OF AMERICA
HWY. 268 EAST, GENTRY LANE
P.O. BOX 918
ELKIN, NC 28621
SURRY COUNTY
NORTH CAROLINA
DESIGN CONSULTANTS
CML ENGINEERING DMSION
4190 HIGHWAY 16 SOUTH
NEWTON, NC 28658
[phone] OFFICE
(70d) 465-5878 FAX
UA)
278

4190 Hwy. 16 South • Newton, NC 28658 • [phone] 0 Fax [phone]
May 21, 1996
Mr. R. C. Landry
Candle Corporation of America
P.O. Box 918
Elkin, North Carolina 28621
Subj: Engineering Analysis for Modification to NPDES Permit No. 0060691
Dear Mr. Landry:
We have completed an analysis of the options required for the NPDES Permit Modification per our
agreement. The report of the analysis is attached.
The four options evaluated were:
1. Discharge to the Elkin system
9-0
2. Subsurface Disposal
3. Spray Irrigation
4. Treatment and discharge to the Yadkin River
Our analysis showed that option No. 4 was the most cost effective means of disposal of the employee
wastewater. The estimated capital cost of this option is $106,000.
Please let me know if you would like to discuss our findings. `—
Very truly yours,
4-111. a?&-
Recil H. Wright, P.E.
RHW/ccc
Attachments
NORTH CAROLINA DESIGN CONSULTANTS

ENGINEERING ANALYSIS
NPDES PERMIT OPTIONS
FOR MODIFICATIONS
TO NPDES PERMIT NO. NC 0060691
CANDLE CORPORATION OF AMERICA
SURRY COUNTY, ELKIN, NORTH CAROLINA
BACKGROUND
Candle Corporation of America'(CCA) is located approximately four miles east of Elkin, NC just south
of Hwy. 268 on the north bank of the Yadkin River. They manufacturer candles requiring extrusion and
molding of waxes. There are two discharges from the plant facilities. One is non -contact cooling water
resulting from the heating and cooling process required in the manufacturing of candles and the other is
employee waste.
Currently, the non -contact cooling water is discharged to a lagoon. The effluent from the lagoon is
discharged to an unnamed tributary to the Yadkin River.
The domestic wastewater is discharged to a 10, 000 gallon per day wastewater treatment plant. Estimated
daily current average flow is 7,400 gallons per day.
CCA is in the process of expanding the facilities at the plant. These expansions will increase employment
creating additional flows that must be handled. The current permit is written for 10,000 gallons per day..
Based on projections, it appears that an additional 10,000 gallons per day will be required. The current
permit must be modified to allow a total of 20,000 gallons per day.
The Department of Environment, Health & Natural Resources has published guidelines on preparation
of an economic analysis for the NPDES permit options which is required for modification of the permit.
The guidelines require evaluation of four alternatives which are:
1) Discharge to an existing sewer system served by a valid NPDES permit.
2) Subsurface disposal.
3) Spray irrigation.
4) Discharge to surface waters.
Evaluation of each of the alternatives is based on an additional 10,000 gallons per day of domestic
(employee waste). The non -contact cooling water will continue to be discharged at the present location
under the current NPDES permit.

EVALUATION OF ALTERNATIVES
Alternate #1- Discharge to the City of Elkin sewer system.
This alternate involves pumping of the domestic wastewater from CCA plant along NC 268 to the Elkin
system. The route of the force main would be from a new pumping station at the CCA facility along the
access road to NC 268 then along NC 268 to Johnston Road.
With the route of the force main, the new pumps must overcome a static head of 120 feet. Various size
force mains were investigated to determine the head losses at various pumping rates to maintain a minimum
velocity of 2 feet per second. Using a 2-1/2 inch force main at 32 gallons per minute (equivalent to 2 feet
per second) results in a head loss of 148 feet in the approximate 3.6 mile length of the force main. This
would result in a total dynamic head of 268 feet. Using a 3 inch force main, pumping at a rate of around
40 gallons per minute, a head loss of 102 feet would result in a total dynamic head of 222 feet.
At these low pumping rates and very high heads, a positive displacement pump or a progressive cavity
pump would be the most appropriate type pumps to use.
The facilities required to pump the wastewater from CCA to the Elkin system are:
1) Anew pumping station consisting of a 4' diameter precast concrete wet well, two progressive
cavity pumps each rated at 40 gallons per minute at 220' of head, necessary electrical controls,
and either a chlorine or hydrogen peroxide feed system to reduce anaerobic conditions caused
by the long detention time in the force main.
2) A force main consisting of approximately 3.6 miles of 3" diameter class 200 PVC pipe, the
necessary air relief/vacuum valves, and highway and railroad crossings.
Under current NCDOT requirements, CCA would be required to obtain an acknowledgement of each
property owner indicating they have been contacted by CCA and that they are aware that CCA wishes to
place the force main on right-of-way claimed by DOT. This would require CCA contact each property
owner along the route of the force main, send a letter explaining what CCA wishes to do in regard to the
construction, and obtain a signed statement from each owner indicating they are aware of CCA's
intentions. This is a tedious process and if not handled delicately, one property owner could delay or even
prevent the construction of the force main.
A detailed Capital Cost Estimate is shown below ofthe facilities required to pump the wastewater to Elkin.

Capital Cost Estimate
Pumping to Elkin
1. Pumping Station
a. Wetwell 4' diameter precast
b. Superstructure
C. Pumps
d. Controls
e. Site Work
f. Electrical
g. Piping Connection
2. 3" Force Main
a. 19,000' at $7.50/ft.
b. Borings 8" Casing 80' @ $80.00/ft.
$ 2,000
7,000
16,000
5,000
1,000
5,000
1,000
$ 37,000
$ 142,500
6,400
$ 185,900
Engineering, Legal & Contingencies 47,100
Estimated Project Cost $ 233,000
The estimated annual operations and maintenance cost is $3, 888 per year which includes, electrical power,
labor, maintenance and cost of treatment by Elkin.
A present worth analysis was performed using a 20 year design life at 8%. The present worth of this
alternate is $284,400.
The route of the force main and discharge point to the Elkin system is shown on Figure 1.
Alternate #2 - Subsurface Disposal
Law Engineering assisted in determining acceptable subsurface disposal areas as well as spray irrigation
areas and loading rates. A copy of their report is attached as an appendix to this report.
The conclusion reached by Law Engineering is that the soils on the 3 5 acre plant property are unacceptable
because they have been disturbed and there is not adequate room on the property owned by CCA for drain
field or spray irrigation area.
Several areas in the vicinity ofthe plant were evaluated including the property owned by Duke Power east
of the access road and a farm area on the west side of the access road approximately 0.6 miles north of
the plant. Because of the many transmission line right-of-ways crossing the Duke Power property, this
site was eliminated from further evaluation. Most acceptable site for subsurface disposal and spray
irrigation is the farm area north of CCA's plant. The approximate location of the area is shown on
Figure 1.

Law Engineering estimated loading rates for subsurface disposal to be 0.2 gallons per square foot per day
for a conventional system and 0.08 to 0.1 gallons per square foot per day for a low pressure system. Based
on the 10,000 gallon average daily flow, the conventional system would require 50, 000 square feet of drain
field area or 16,667 feet of4" perforated line. This would require an area of approximately 6.5 acres based
on the lines being placed 9 feet on center including buffer areas.
A low pressure system at 10,000 gallons per day with a loading rate of 0.1 gallons per square foot per day
would require 100,000 square feet of drain field area or 33,333 feet of line. This would require about 6.5
acres of land including buffer area based on a line spacing of 5 feet on center.
The cost of the conventional system not including dosing tanks, septic tanks or conveyance lines to the
drain field, would be approximately $143,000. This is based on $7.00 per foot for 4" perforated pipe and
gravel and $4,000.00 an acre for land purchase.
The cost of the low pressure system and 6.5 acres of land is estimated to be $143,000. This is based on
the low pressure line cost at $3.50 per foot. The $143,000 cost does not include any pumps, tankage,
electrical controls, or any conveyance lines from pumps to drain field.
In addition to construction at the site, a pumping station and a 3" force main would be required to covney
the waste from the plant to the drain fields. Estimated cost ofthese facilities is $59,500. This would place
the estimated cost for each system at $202,500.
Because of the relatively high capital cost of each option, they were eliminated from further evaluation.
Alternate #3 - Spray Irrigation
As with subsurface disposal, the farm area north of CCA plant was chosen as most desirable location within
the vicinity for spray irrigation. Law Engineering has estimated the Spray Irrigation loading rate to be in
a range of 0.5 to 0.75 inches of wastewater per acre per week. The total wetted area required for spray
irrigation would be 2.5 acres based on 0.75 inches per acre per week to 3.7 acres based on 0.5 inches per
acre per week. Assuming buffer areas would only be required around property lines, the total irrigation
area is estimated to be 10 acres.
Because of the relatively small area involved in the spray irrigation, a solid set type system was chosen
for evaluation for the spray irrigation. This system involves installation of underground piping with riser
pipes to .spray heads. For purposes of evaluation, 1/2" brass spray heads rated at 4.5 gallons per minute
per head with a spray radius of 44' at 40 psi was chosen. Based on this nozzle, 72 spray head would be
required to cover a wetted area of 3.7 acres. Three inch diameter header pipes was chosen as the
preliminary size for each header assuming a square field of approximately 401'. Manifold piping would
range from 4" diameter to 6" with an 8" supply pipe from the supply pump to the manifold.
A lagoon that would have an estimated volume of 30 days storage or 300,000 gallons would be required.
The lagoon would be located on site near the spray field. For purposes of the evaluation, it was assumed
the lagoon would be earthen construction with top dimensions of 95 feet at the water surface, 8 feet deep
with 3 :1 side slopes. The lagoon would be lined. It was assumed that suitable natural soil material would
be available on site to provide material for the lining.

Wastewater from the plant would be pumped from a station at the plant via a 3" force main to the lagoon.
From the lagoon, the wastewater would be pumped through the piping network to the spray heads. The
supply pump would be rated at 324 gallons per minute at 140' of head 'requiring a 20 horsepower motor.
A detailed cost estimate for this alternate is shown below.
Capital Cost Estimate
Spray Irrigation
1.
Field Piping
3" 3300' @ $ 5.00
$ 16,500
4" 180' @ 6.00
1,080
6" 132' @ 12.00
1,584
8" 600' @ 15.00
9,000
2.
Nozzles
72 @ $50/Ea.
3,600
3.
Risers
72 @ $10/Ea.
720
4.
Valves
1/2" 72 @ $10/Ea.
720
3" 8 @ $150/Ea.
1,200
5.
Supply Pump
11,000
6.
Lagoon
35,000
7.
Land Purchase
10 Ac. @ $4,000/Ac.
40,000
8.
Pump Station at Plant
37,000
9.
Force Main to Lagoon 3" 4500' @ $5.00
22,500
Borings
3,200
$ 183,104
Engineering, Legal & Contingencies 45,896
Total $ 229,000
Total estimated capital cost is $229,000. The estimated annual operation of maintenance is $6,569. The
estimated annual operation of maintenance is $6,569. The estimated present worth based on 20 years at
8% is $294,000.
Alternate #4 - Proposed discharge to the Yadkin River
This alternate is based on the treatment of 10,000 gallons per day of domestic wastewater and discharging
the effluent to the Yadkin River. Further, it is assumed that the discharge limits will be: BOD 3 0 milligrams
per liter, total suspended solids 30 milligrams per liter, pH 6 to 7, fecal coliform 200 per 100 ml and no
numerical limits on ammonia or dissolved oxygen.
Alternatives of treating the domestic wastewater and discharging it to the river were investigated. These
include: 1) use the existing lagoon as a facultative lagoon, 2) use part of the lagoon by partitioning into
cells of the volumes required to treat the domestic wastewater or 3) use a small wastewater treatment plant
independent of the lagoon placed beside the existing 10,000 gallon per day plant.

Alternate 91 would require that the cooling water that is presently discharged to the lagoon be removed
and this discharge be directly, to the creek. All the domestic wastewater would then be discharged to the
lagoon. The lagoon would act as a facultative lagoon meaning that the lagoon would be operated at a
relative shallow depth (around 3 feet) with no mechanical aeration. The lagoon volume is about 1.3 million
gallons at the 3 foot depth. past experience with lagoons, of this type, indicate that there will be problems
inconsistently meeting BOD and TSS limits. One of the many reasons for this problem is that the algae
growth resulting from the nutrient availability in the wastewater, contributes to the TSS concentrations.
The BOD and TSS effluent concentrations from the lagoons ofthis type have been at best erratic. On this
basis, this alternative was eliminated from further consideration.
Alternate #2, partitioning the existing lagoon into several cells and mechanically aerating the required
volume and operating the facility basically as an extended aeration plant was considered. The remaining
part of the lagoon not used for treatment of domestic wastewater would be used for discharge of cooling
water. In addition to partitioning the.lagoon, a secondary clarifier would be required with sludge return,
pumps an dpiping and also a liner. The estimated cost for this alternate is $150,000.
Alternate #3, purchase and installation of a 10,000 gallons per. day "Package" Treatment Plant was
considered because of the "Control' that CCA would have on the treatment of the domestic wastewatter
within a properly run treatment plant. This installed cost of the plant is $85,000 (not including piping to
the river).
Use ofthe package treatment plant is considered the most feasible alternate for treatment ofthe domestic
wastewater for discharge to the Yadkin River.
Using the "package" plant as the preferred method of treatment, a detailed cost estimate ofthe plant was
prepared as shown below.
Capital Cost Estimate
Discharge to Yadkin River
1. Treatment Plant $ 60,000
2. Electrical 10,000
3. Site Work 15.000
S 85,000
Engineering, Legal Contingencies 21,000
Estimated Project Cost $ 106,000
Approximate location of the discharge point is shown in Figure 1.
Operations and maintenance cost were estimated including electrical, maintenance, labor, sample
analysis and sludge disposal. Total yearly costs were estimated to be $10,927.
Present worth of this alternative based on a design life of 20 years at 8% is $213,270.

Conclusions
Below is a summary of the cost and other considerations for each alternate.
Capital
Yearly
Present
Alternate
Cost
Cost
Worth
Other Considerations
1
$ 233,000
$ 3,888
$ 284,400
Requires Right -of -Way Notification
2
Not Evaluated - Too Costly
3
$ 301,155
$ 13,000
$ 428,771
Requires Land Purchase or Lease
4
$ 126,000
$ 10,927
$ 233,268
No Land Purchase Required
We recommend that alternate 4 - Discharge to Yadkin River be pursued by CCA for disposal of the
domestic wastewater.

APPENDIX

May 10, 1990
Carolina Designs Ltd.
P.O. Box 918
Elkin, NC 28612
Attn: Mr. Bob Landry
Ak
LAW ENGINEERING
GEOTECKNICAL. ENVIRONMENTAL
& CONSTRUCTION MATERIALS
CONSULTANTS
ESP Associates, P.A.
10100 Park Cedar .Drive, S-190
Charlotte, NC 28210
Attn: Mr. Cecil Wright, P.E.
Subject: REPORTOF A PRELIMINARY SOIL SURVEY MAP
INTERPRETATION FOR LAND TREATMENT OF WASTE
CAROLINA DESIGNS ]LTD PROPOSED ADDITION
ELKIIN, INORTTI CAROLINA
LAW ENGINEERING JOB NO: J47290-5572
Gentlemen:
Law Engineering is pleased to present our preliminary soil interpretation report of the
above mentioned project. We understand that our report is to be used for. preliminary cost
estimates for various land treatment systems for the facility.
PROJECT INFORMATION
Carolina Designs, Ltd wishes to expand their facility near Elkin, North Carolina. The
expansion will be constructed over their existing on -site waste treatment system for
treatment of their domestic waste. ESP Associates is providing civil design services foT the
project.
Law Engineering was authorized by Mr. Bob Landry of Carolina Designs, Inc in May 1990
to provide preliminary soil information for a land treatment system to treat their domestic
3301 ATLANTIC AVE.
P.O. BOX 18288
RALEIGH, NC 27619
919.878-U6

These soils are considered suitable to provisionally suitable for on -site systems. Their
moderate depth to saprolite is the prominent soil characteristic which may rate them as
provisionally suitable. Normally, at least 24 inches of soil material above saprolite or rock
is required to permit an on -site system. Slopes above 3017b,, are considered unsuitable for
on -site treatment systems. Some of the upland soils ate mapped on slopes of greater than
25% in the area near streams.
The soils along the Yadkin River are mapped as the Congaree, Masada, and State soil
series' by the SCS. The Congaree soil series is formed on flood plains and is expected to
flood frequently for brief periods. These soils would not be suitable for land treatment
Systems.
The State and Masada soil series' are formed on stream terraces and may also experience
brief periods of flooding. Frequently flooded areas are considered not suitable for on -site
systems. These soils may be suitable for irrigation systems. Additional field work will be
necessary in these areas to determine their suitability for irrigation.
The soils described in the upland areas near the facility are generally suitable for
conventional, LPP and irrigation systems. We expect their loading rates to be:
Conventional - 0.2 gal/sq.ft./day
LPP - A to .1 gal/sq.ft./day
Irrigation - .5 to .75 inches/acre
(12380 gal/acre to 20366 gal/acre)
Based on a design flow of 10,000 gallons/day, we estimate a total treatment area for LPP
systems of 100,000 square feet (10,000 gal/day - .1 gal/sq.ft./day). The total amouriti-of
land required for LPP systems includes the total treatment area repair :area, buffers, space
between lateral nitrification lines, additional construction area due to complex topography
or other specific site adjustments. We estimate a niinimum total system area for an LPP
system. to be approximately 200,000 square feet or 6.5 acres.
3

We suggest that the minimum acreage required for an irrigation system would be
approximately 10 acres if property line buffers encircling the site were the only buffer
requirement. 7n addition, the irrigation system will require a 30 day storage lagoon with
additional capacity for a 25 year storm and 1 foot of freeboard. The lagoon can be a
treatment and storage (anaerobic) lagoon if sufficient volume is designed for both uses.
The State requires that the lagoon be lined with an impermeable (10-7 cm/sec) soil liner 1
foot thick or artificial liner. Based on the soil survey maps we believe that the soils
between depths of 1 foot and 4 feet below the surface are suitable for a soil liner.
The wastewater should be applied to the soil surface in a wanner resembling a gentle
soaking rain event. To avoid run-off and erosion -we estimate the surface loading
(instantaneous loading rate) to be .2 inches/hour. The sprinkler system should be
designed to achieve even distribution over the.soil surface. Several options of sprinkler
design are possible:
1) Solid Set System pipes are installed underground with above ground risers
and nozzles or "pop-up" sprinklers.
2) Above Ground System quick connect aluminum pipe, is placed on soil surface
with risers and nozzles.
3) Center Pivot - irrigation arm travels in a circular area around a pivot or supply
point.
4) Traveli,Tg Gun - a portable "gun" is pulled out by a tractor. "a "gun" is drawn
back to the supply reel by a gasoline motor on the reel.
We appreciate the opportunity to provide you with land treatment and soil science
services. Please contact us if you have any questions concerning our report. We look
fonvard to working with you in the future.
Very truly yours,
LAW ENGINEERING
-, � rz), �, " k
('
Fred D. Smith
Soil Scientist
Registered 2312
E
Barney C. Hale, P.E.
Senior Geotechnical Engineer
Registered, North Carolina 11285
�I
LAW fMEx�e F%.x.a

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WASTEWATER
DISPOSAL
OPTIONS
FOR
NPDES PERMIT
APPLICATION
CANDLE CORP.
of AMERICA, Inc.
May 21, 1996
1000 0 1000 2000 3:
SCALE. 1 "= 20W
(APPROXIMATELY)

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NCO060691
PERMITTEE NAME: Candle Corporation of America
FACILITY NAME: Candle Corporation of America
Facility Status: Existing
Permit Status: Modification
Major Minor
Pipe No.: 002
Design Capacity: 0.030 MGD
Domestic (% of Flow):
Industrial (% of Flow):
1
11
Comments:
Flow increased from existing limit of 0.010 MGD to 0.030 MGD,
RECEIVING STREAM: the Yadkin River
Class: C
Sub -Basin: 03-07-02
Reference USGS Quad: B1SSE, Elkin North (please attach)
County: Surry
Regional Office: Winston-Salem Regional Office
Previous Exp. Date: 00/00/00 Treatment Plant Class: new
Classification changes within three miles:
NZA
Modeler Date Rec. #
$,k�:�
Drainage Area (mil) 9011 Avg. Streamflow (cfs):
7Q10 (cfs) 3 3 Winter 7Q10 (cfs) 535 30Q2 (cfs) 95
Toxicity Limits: IWC Nlfi % Acute/Chronic
Instream Monitoring:
Parameters /V/,9
Upstream
Location
Downstream Location
Effluent
Characteristics
Summer �,�r--
/U✓in f-
BOD5 (MgM
30.0
NH3-N (mg/1)
�'Yldl?l fvi
D.O. (mg/1)
n/
TSS (mg/1)
0. 0
F. Col. (/100 m1)
pH (SU)
_
kdAPl W
(I, 03 Aft!'
hlwk
Tor -
Requested by: Jeff M hra
Date:
7/,U/96
Prepared by:
Date:
2' + !_
Comments:
Reviewed by: 1
LzQta_ f _
_-r .

I = - rY
.00 _ '/0J6
\ 1000
' I138 II
Elkin', cip IAirAirport"
//oz i
$urch J
/05
NI1139\ `\\\cam_ \ — _ _ •//%ti y'a ���\ 7
10� •mod - o ff,• Ir( _ J� 9Q0 \\\
Friendship
63if
'/• I w 11 1
Wate
•l. \ �\ Tank 1 ����}\ -- -I�------- - - --� 1 �.
_ •� Substations `='; _ '',\ •;' r
WOO
Lake If
948
Res22
e
L, 990
-
' .. r e oint .
�`. pel Ch „ ( \ Discha 9 P o
N 518 I 47�3011 / 519 520 *U.S GOVERNMENT PRINTING OFFICE
21
ROAD CLASSIFICATION
PRIMARY HIGHWAY LIGHT -DUTY ROAD, HARD OR
HARD SURFACE IMPROVED SURFACE
SECONDARY HIGHWAY
HARD SURFACE ® UNIMPROVED ROAD
Latitude 36015'20" Longitude 80047'01"
Map # B15SE Sub -basin 030702
Stream Class C
Discharge Class 14 02
Receiving Stream Yadkin River
Design 0 0.3 MOD Permit expires 5/31/99
SCALE 1:24 000
0 1 MILE
0 7000 FEET
1 0 1 KILOMETER
CONTOUR INTERVAL 20 FEET
QUAD LOCATION Candle Corporation of America
NCO060691
Surry County
WWTP

Facility Name:
NPDES No.:
Type of Waste:
Facility Status:
Permit Status:
Receiving Stream:
Stream Classification:
Subbasin:
County:
Regional Office:
Requester:
Date of Request:
Topo Quad:
FACT SHEET FOR WASTELOAD ALLOCATION R � L I c D
Request # 8498 F-•
Candle Corporation of America
NCO060691-002
Domestic - 100%
Existing
Modification
Yadkin River
C
03-07-02
Surry
Winston-Salem
Jeff Myhra
7/23/96
B 15 SE
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
This WLA is for outfall 002
J U L 3 1 1996
Winatn n-Saie.m:
R;.gional;C)ffjda
Stream Characteristic:
USGS #
flows frottLJ990
WLA
Date:
Drainage Area (mi2):
891
Summer 7Q10 (cfs):
383
Winter 7Q10 (cfs):
535
Average Flow (cfs):
1420
- -
T�
30Q2 (cfs):
695
'•' `
IWC M:
0.01%
co
Candle Corporation of America has applied for a permit modification to increase its
discharge of domestic waste from 0.01 MGD to 0.03 MGD. The dilution ratio at the increased
wasteflow is estimated to be 8,237:1. With this high a dilution the increased wasteflow is expected
to have a negligible impact on the river. Therefore, no permit changes are recommended.
A review of 1993-June 1996 DMR data revealed that the facility has had 3 violations of the
BOD5 monthly average permit limit and 8 violations of the BOD5 daily maximum permit limit.
Special Schedule Requirements and additional comments from Reviewers:
Recommended by:
Reviewed by
Instream Assessment: Date:
Regional Supervisor: /, "LLB, Date:
Permits & Engineering: Date:ff
Z 6
RETURN TO TECHNICAL SUPPORT BY: AUG 2 4 19%

2
CONVENTIONAL PARAMETERS
Existing Limits:
Monthly Average
Summer/
Winter
Wasteflow (MGD):
0.01
BOD5 (mg/1):
30.0
NH3N (mg/1):
monitor
Temperature (C):
monitor
TSS (mg/1):
30.0
pH (SU):
6-9
Recommended Limits:
Monthly Average
Summer/
WQ or EL
Winter
Wasteflow (MGD):
0.03
BOD5 (mg/1):
30.0
EL
NH3N (mg/1):
monitor
Temperature (C):
monitor
.TSS (mg/1):
30.0
EL
pH (SU):
6-9
EL
Limit changes due to:
No limit changes recommended.
Parameter(s) are water quality limited. For some parameters, the available load capacity of
the immediate receiving water will be consumed. This may affect future water quality based
effluent limitations for additional dischargers within this portion of the watershed.
M
No parameters are water quality limited, but this discharge may affect future allocations.

INSTREAM MONITORING REQUIREMENTS
Upstream Location: n/a
Downstream Location: n/a
Parameters: n/a
Special instream monitoring locations or monitoring frequencies:
MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS
Adequacy of Existing Treatment
Has the facility demonstrated the ability to meet the proposed new limits with existing treatment
facilities? Yes No �000'
If no, which parameters cannot be met? Flow
Would a "phasing in" of the new limits be appropriate? Yes No _-�'
If yes, please provide a schedule (and basis for that schedule) with the regional
office recommendations:
,S ue gragea.
Special Instructions or Conditions
Wasteload sent to EPA? (Major) (Y or N)
(If yes, then attach updated evaluation of facility, including toxics spreadsheet, modeling analysis
if modeled at renewal, and description of how it fits into basinwide plan)
Additional Information attached? (Y or N) If yes, explain with attachments.

r A-- �
Ya Al "n— vp--)/,
o3-a�-0z
-d
r

Jan
T
fan '9�
Ram l9
✓
Nov''9�1
✓
ot '93

Candle Corporation of America
Yadkin River
NC0060691
Residual Chlorine
Ammonia as NH3
(summer)
7Q10 (CFS)
383
S7Q10 (CFS)
383
DESIGN FLOW (MGD)
0.03
DESIGN FLOW (MGD)
0.03
DESIGN FLOW (CFS)
0.0465
DESIGN FLOW (CFS)
0.0465
STREAM STD (UG/L)
17.0
STREAM STD (MG/L)
1.0
UPS BACKGROUND LEVEL (UG/L).
0
UPS BACKGROUND LEVEL (MG/L)
0.22
IWC (%)
0.01 %
IWC (%)
0.0 %
Allowable Concentration (ug/1)
140039
Allowable Concentration (mg/1)
6425.52
NBOD (mg/1) = 28914.82
Ammonia as NH3
(winter)
W7Q10 (CFS) 535
Fecal Limit Not Required DESIGN FLOW (MGD) 0.03
Ratio of 8237.56 :1 DESIGN FLOW (CFS) 0.0465
STREAM STD (MG/L) 1.8
UPS BACKGROUND LEVEL (MG/L) 0.22
IWC (%) 0.0%
Allowable Concentration (mg/1) 18180
NBOD (mg/I) = 81811.33
7/26/96

t
cc: Permits and Engineering
Technical Support Branch
Surry County Health Dept.
Central Files
WSRO
To: Permits and Engineering Unit
Water Quality Section
Attention: Jeffrey Myhra
Date: August 1, 1996
NPDES STAFF REPORT AND RECOMMENDATION
County: Surry
Permit No. NC0060691
PART I - GENERAL INFORMATION
1. Facility and Address: Candle Corporation of America
P.O. Box 918
Elkin, North Carolina 28621
2. Date of Investigation: June 13, 1996
3. Report Prepared by: Allan Smith
4. Persons Contacted and Telephone Number:
Hal Transou, ORC [phone]
Bob Landry, CCA [phone]
5. Directions to Site: Take Hwy. 67 or I-77 to Hwy. 268 (or
you may take Hwy. 52 and turn on Hwy. 268 at Pilot Mt). A
few miles outside Elkin take Gentry Lane on the right. This
road dead -ends at Candle Corp. of America.
6. Discharge Points(s), List for all discharge points:
Pipe 001 Latitude: 36' 15' 26" Longitude: 800 47' 03"
Pipe 002 Latitude: 360 15' 21" Longitude: 800 46, 49"
U.S.G.S. Quad No. B15SE U.S.G.S. Quad Name Elkin South
7. Site size and expansion area consistent with application ?
X Yes No If No, explain:
8. Topography (relationship to flood plain included): The WWTP
is located out of the flood plain.
9. Location of nearest dwelling from the treatment plant: 100,

i
10. Receiving stream or affected surface waters: Yadkin River
a. Classification: "C"
b. River Basin and Subbasin No.: 03-07-02
C. Describe receiving stream features and pertinent
downstream uses: fishing, wildlife, recreation, and
agriculture.
Part II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of Wastewater to be permitted: 0.020 MGD
(Ultimate Design Capacity)
b. What is the current permitted capacity of the Waste
Water Treatment facility? 0.010 MGD
C. Actual treatment capacity of the current facility
(current design capacity)? 0.010 MGD
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; Bar screen, aerated equalization basin,
extended aeration, clarifier, aerated sludge holding
basin, chlorine contact tank, and a V-notch weir.
f. Please provide a description of proposed wastewater
treatment facilities. Installation of a new 10,000 gpd
package plant next to existing 10,000 gpd package
plant. No specific details have been received.
g. Possible toxic impacts to surface waters: None known.
2. Residuals handling and utilization/disposal scheme:
a. Other disposal/utilization scheme (Specify):
Septage hauler.
3. Treatment plant classification (attach completed rating
sheet) . Class II
4. SIC Code (s): 3999
Primary 02 Secondary
Main Treatment Unit Code: 0 6 0 7
NPDES Permit Staff Report
Version 10/92
Page 2

PART III - OTHER PERTINENT INFORMATION
1. Alternative Analysis Evaluation: Has the facility evaluated
all of the non -discharge options available. Please provide
regional perspective for each option evaluated.
Spray Irrigation: Possibility but too expensive according
to furnished report.
Connection to Regional Sewer System: Until recently this
could have been an option but it is no longer feasible.
Subsurface: According to reports this is not feasible.
Other disposal options: Unknown.
Part IV - EVALUATION AND RECOMMENDATIONS
The question of total daily flow from the treatment plant
needs to be resolved. The report states an increase to 0.020 MGD
but the cover letter has an increase to 0.030 MGD. We assume it
is an increase to 0.020 MGD since the facility has a 10,000
gallon plant and plans to install another 10,000 gallon plant.
Whatever the case, Candle Corporation MUST BE REQUIRED to
find out what their actual flow is. There have been reported
instances in the past where the average flow over two days was
close to 19,000 gallons per day. It would be ludicrous to
install two plants which could only handle 20,000 gallons per day
when the total flow is greater than that. This facility keeps
expanding and hiring more personnel which means that a treatment
plant will have to keep up with the growth of the company in the
near future. When the 19,000 gallon per day flow was recorded
the company was much smaller than it is today so there is no way
to know the actual flow. This is why the company should be
required to use a continuous flow recorder to get an accurate
flow rate before they expand their existing plant. Due to the
break periods, lunch times, and other factors at the plant an
instantaneous flow estimate is not adequate.
The WSRO recommends that Candle Corporation of America
expand its wastewater treatment facility in accordance with
Division policy and after finding their actual flow.
mhut_"
Signature of report preparer Date
Water Quality Regiona 'Supervisor Date
NPDES Permit Staff Report
Version 10/92
Page 3

11
ATING SCALE FOR CLASSIFICATION OF WATER POLLUTION CONTROL SYSTEMS
Name of Facility: L A nt D E L; ,C) r< PO PW T1O Al 0 F 4171 f_ k I r"((
Owner or Contact Person: P)R. L A P i2 X K P1, -
Mailing Address: P n x
County: a P11Y Telephone:
Present Classification: New Facility, r/ Existing Facility
NPDES Per. No. N1000 620 1 Nondisc. Per. No.WQ Health Dept.Per No.
Rated by: (_E012GE .5-01"Td _Telephone: Date: i'-.?" /'Y
Reviewed by: - Health Dept. Telephone:
Regional Office Telephone:
Central Office Telephoner
ORC: H14L TRp. 9r,0 Grade: = Telephone: 'lit- 9 3S"2 76
Check Classification (s): Subsurface Spray Irrigation Land Application
Wastewater Classification: (Circle One) I 11 IiI N Total Points:- .` Q
FILA :� �-- :►� :7 1=� �►11:� •.�. li,.=►I al. �. - :► u11.. :1 I►� r-11: i:t�� Imo► �.. •�J
��,�� � : � a � 1 1' : 1. =►1 ��: 1.1 i : i!� � : 1!► ! ' 1. :►.. D 1=,.. !ter .71►. !► � JI. :►.
-►I� /Ia ►III: 1�► �► � ,J �:�• �= �� �. Imo•`
SUBSURFACE C1ASSiFICAT10N
(check .all units that apply)
1. -septic tanks
2. pump tanks
3—siphon or pump -dosing systems
4—sand filters .
5. grease trap./interceptor
6 oil/water separators
7� _gravity subsurface treatment and disposal:
8. pressure subsurface treatment and disposal:
SPRAY IRRGATION CLAssmc 1TiCN
(check
all units that apply)
1_
_ preliminary treatment (definition no. 32 ).
2.
lagoons
3.
_ _septic tanks
4.
pump tanks
5.
- pumps
6•
sand fifters
7
grease trapArilerceptor
8.
o1/water separators
1i
disinfection
10.
chemical addition for nutrienUalgae control
11.
spray Irrigation of wastewater
In addition to the above classifications, pretreatment of wastewater in excess of these components shell
be rated using the point rating system and will require an operator with an appropriate dual certlticatlon.
LAND APPLICATION/RESIDUALS CLASSIFICATION (Applies only to permit holder)
1. Land application of biosolids, residuals or contaminated soils on a designated she.
WASTEWATER TREATm TFACILiTYCLASSIFICATION
The following systems shall be assigned a Class 1 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 if Appropriate)
1. OiVwater Separator Systems consisting only of physical separation, pumps and disposal;
2 _SepticTank/Sand Fitter Systems consisting only of septic tanks, dosing apparatus, pumps,sand filters, 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. Ciosed-loop Recycle Systems;
5. Groundwater Remediation Systems consisting only of oiVwater separators, pumps, air -stripping, carbon adsorption, disinfection
and dispo.-J;
6. Aquacuhure operations with discharge to surface wafers;
7. Waler 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 if permitted after July 1,
1993 or ii 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.

lowing scale Is used �M'mting wastewater treatment facilitie- ircle appropriate points)
frBA POINTS
(1) Industrial Pratrestment Units or ItWustrisi Pretrawmart Program (a" dMMhbn No.
(2) DESIGN FLOW OF PLANT IN plod (rot applicable to non -contaminated cooing waters, sludge handing facilities for
water purffication plants, totally dosed tycis ttystems(see definition No. 11), and facilities consisting only of item
(4xd) or Items 0 -- 20 000 (1 t)(d)) 1�
20,001 - 50,000 _2
50,001 - 100.000. _.3
100,001 - 250.000-__�...... __.__.._�_�... __.__._.__.:_ --A250.001 - 500,000»— _--...._....5
500,001
1,000.001 2,000,000.. _ _ __ __ _.__ »7 0
2.000.001 (arid up) rate 1 point additional for each 200.000 gpd tarp, fly up to a maximum of _.30
Design Flow (gpd) 10, 0CG,
(3) PRELIMINARY uNrrSIPROCESSES (a» definition NMM
(a) Barseraers_M.___.»..._______
or
(b) Mechanical Screens, Static Screens or Comminuting Devices_._
(c) Grk Rerroval- _._...___..._..._._......_____-----_—»______-----____--- 1
or
(d) MadtaniealorAerated GrfRemoval __...___._._._..____—______»...._..._—______--- 2
(a) Flow Measuring Devke
or
(1) instrumented Flow Measurement..»._._ ---...-.-.— - - -2
(li) Press ration..._......_. _._..__. ........_._...... ___._ __.__......__._..._. _..._
(4)
(5)
(a)
(h) Influent Flow
(1) Grease or Oil Separators - Gravity
Mechanical.._—._—•.3
Dissolved Air Flotation__.________
()) Prechlorination.______..__�
PRIMARYTREATMENT LNITS+PROCESS6
(a) Septic Tank (sae defW ion No. 43) _
(b) Imhoff Tank..».._._..__ ..........__......... »_...._._ � �..___ ......__ _ ...._..._._ _ .»_._.5
(c) Primary Clarifiers.
(d) Settling Ponds or Selling Tanks for inorganic Nontoxic Materials (sludge handling facilities for water
purffication plans. sand. gravel, atone, and otter mining operations except recreational activities such as gem
or gold mintng)....._.____»._..._..._....__»_____ . ___.........____-_____---- ____2
SECONDARYTREATME T1NITS6FiOCffiES
(a) Carbonaceous Stage
(1) Aeration -High Purity Oxygen System+ on
Diffused Air
Mechanical Air System (fixed, floating or rotor)_ _ a
Separate Sludge Reaeratlon. _..._.�____
(g) Trickling For
High Rate.-r.—....^._ __ .....-....-.. _ .....7
Standard Rate..
Packed
Biological Aerated Filter or Aerated Biological Filter 0
(Iv) Aerated Lagoons ..... _ _ _.. __.— _.__..._....»... _..._10
(v) Rotating Biological Contactors_.»_» __ ______...»_..._.. _».___.___
(VI) Sand Filters -intermittent biological. . ......
Recirculating biological. - ...
(VA) Stabilization Lagoons.______........
(fxj) Single stage system for combined carbonaceous removal of BOO and nitrogenous removal by
nWicatlon (see definition No. 12)(Points for this hem have to be In addition to hems
(5)(a)(1) through (5)(a)(v111),
utilizing the extended aeration process (see dentition No.3a)..».............
__.._»....»..__2
utilizing other than the extended aeration
(x) NUtrient additions to enhance BOD
(xl) Biological Cuhura (-Super
(b)
Nitrogenous Stage
(I) Aeration - High Purity Oxygen
Ditfused Air Syslem..__:._:..-•--•---.— ......... _._ .__ , _— ..._.___........ _ .-......__10
Mechanical Air System (fixed, floating or rotor) ..... ..... ..... __..._..._..._..._.._-._-.�.3
Separate Sludge Reaeradbn..».».»...- ...»__»._....__............... ........» ....-..-__._-3
(II) Trickling Fitter -High Rate ......-......_...... ...._... _.............. _._ ............ _....... __...»__... 7
Standard Rate ...... ................._ ..... ._......_...._.._ -•• . .... .. _ .___..._5
Packed Tower .............. _.._..»..._.....»........__.............. ................ ....._..._._.�5
R Biological Aerated Filler or Aerated Biological Finer ------------- _------ 0
(iv) Rotating Biological Contactors ........ _._............... _...... __.......»...........»...»...._.__.10
(v) Sand Finer - intermittent biological ..._.................... .,...........:.»...._»....__..»__. 2
Recirculating biological..--.--... . .... ..... ..........................
(VI) Clarffer................................. ......... ......_..».»..........._...-._. _ ._._...... ___5.
TERTIARY OR ADVANCED TREATMENT LNiTS/PROCF.SSM
(a)
Activated Carbon Beds -
without carbon regenerat(on ......._ . .»..........-....._..._....._»..»_.:-.-._._.
S
with carbon regeneration. __....................
(b)
Powdered or Granular Activated Carbon Feod-
wfthoutcarbon regeneration _.... .... _................. __»........:...._..:.........--........—.-.
5
withcarbon regeneration»....»-.-.......«.__ ....... -........................ __
......... ».- ... _-----.-._.._1s
(c)
Air stripping ...... »............ -._...... _.......... _.... ______-------- _._.._------------ »._----
_--------------- _»_......_._5
Denhritication Process ....... .... ................. ..._----_....»......_.»..........---------------- ...._... ._......»._» 10
�d)
e)
Electrodlalysla...................... -..... ............... .................... .»...........................................
........ ._ ........-5
(1)
eparation...................................».-.................._......................................»..............................»
Foam Separation. .............................. . .. . . . .................. . ............................. . .......
................................5
(g)
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 rate Infiltration ........................ .....................
:_...__._..__.A
(I)
(J)
Microscreens .................... ...................-.............................................. 5
............................................ ....... ...
Phosphorous Removal by Biological Processes (Sea definition No. 26)............................................. _.»....
(k]
Polishing Ponds - without aeration.»_.. _ .-.. __.................. _ ................ ..._.._.......2
with

• i s }
rasz Mrr<�un - waa.auo......_»_ ...........0
diffused or mectnurlcal .. »....._.... .».......„....„„........� .......„..2
Reverse Or—_,_ _«. »....._ .. _..—.__„ ._ „_ ».„........_....._..... ....... ..5
toil
Sand or Lti'
(n)
high rate...___— ... - —».»....»._.........-......5
Treatment pruc sses for removal of metal or cyanide ... ......... „.......... «
t
»»..„_.........»..»...»...............15
treatment processes for removal of toxic materials other than metal or cyanide ------ —_�--_— ---------- 15
ETRFJ1TMENT
fi)
Sludge Digestion Tank - Heated (anaerobic)..—._.._..._..„„ _ : _ . _._. .._.....__......._....10
"
Aerobic ..»—„..»—_._._. ...............
Unheated (anaerobic) ......... m—N...�»._. ._ „ _ ........................ »
.» .................3
(b)
Sludge Stabilization (chemical orthsrrnai). .» „.__.„._...._._....».„._.„.......... 5
(c)
Sludge Drying Beds -Gravity._._ ..........�„.._ _.... _ »�.. __
Vacuum».„_.......»_....»._.....5
.................._.«...»....-...........
=
_>
'. r7.7
(d)
(0)
Sludge Elutrtatbn.„_...._.„...._.»...».„,.»
Sludge Conditioner (chemcal or tMrmal)...» M_ _..._�.». ..� .».»„. »..w.„--w..—. _ ... 5
r."
(f )
..5
Sludge Thickener (gravity)......„ ........................
(g)
Dissolved Air Rotation Unit [not applicable to a unit rated as(3)(i)]..._._...».....»»,..._„.. _....„...«...._.....8
(h)
(1)
Sludge Gas Utilization (including gas storage)..».-.....»._.—»
Sludge Holding Tank - Aerated
..... ....... »„»»._.._»_.».»_—..»_»..._»»........ ».«»........»..»„... „....... 5
Non•aerbed................ ............._.—........... „„ .............................. . „....„.. »...» . .„...._..».............2
(J)
Sludge Incinerator (not Including activated carbon regeneration) ........ ... ................................................. 10
(8)
(it) Vacuum Fher, Centrifuge, or Flier Press or other similar dewatering devices..____-»__.....-_...._ ---------- 10
RESIDUALS LITILIZATION/DISPOSAL (including incinerated ash)
(a)
(b)
Lagoons ......... ..... .............. ...............................-..................................................................................2
Land Application (surface and subsurface) (see definition 22a)
by contracting to a land application operator or landfill operator who holds the land application permit
(9)
(c
DISINFECTM
orlandfill permit ........ ....... ........ ........... .............. :..........„...»....»......................»...._...._:.................:....2
dicated Landfill(burial) by the pernittee of the wastewater treatment facility --------------------------- ._..5
(a)....„_.......»..._..».».......«.„»..»».»
......... ..»..„............._..................:„.»...5
(b)
Dechbrinat)on..—».».»._._.........».._.._...._.».».»._.«_......... ..._..... .... ....... ...... ..............................
(c)
Ozone...._.»_.....»..„...............»...„..„......_...»....._..»..„„...»_.»__».„..._.»„..„.._..........«........»....._.....5
(d)
Radiation ........................................... _..»................................................................... „....................
(10)
CHEMICAL ADDITION SYSTEM(S) ( see definition No. 9) [not applicable to chemical additions rated as hem (3)0),
(5)(a)(xi),
(6)(a), (6)(b), (!)(b), (7)(e), (9a), (9)(b) or (9)(c) 5 points each:
List„.„»........._..».»__
.._................».........»............_...»_......„....».......»......._......5
_...............»»..»...-.............„....................... _ ... -„.................... _ ...........................
»..„......._...._„....._..»..»._......_„..»...«......_..—..... _................... .......................... 5
(11)
AALSC[311WEOUS UMTS+PROCES,S6S..............._..__.._.._......................... --------- _.-»_---- --- ------------- ------------ 5 .
(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 signfficantly greater than is common
fordomestic wastewater .................................. _.......................................... _........ „.......................... A
(b)
......
Effluent Flow Equalization (not applicable to•storage basins which are Inherent Inland application systems) --- 2
(c)
Stage Discharge (not applicable to storage basins inherent In land appriration systems)__.__.—.__.
(d)
(e)
_3
Pumps.._...»....,«.......„_.:..._._«..»_.»........„„....„......»»....».„..__.» ._....._._»._..„_.»_..
Stand -By Power Supply
(f)
............ -... ............. .»_.„...._—:_.»„
Thermal Pollution Control Device ..................... . ....»....»..._..........«—....»................. ....
TOTALPOINTS.....»_—...»...__--_....._......_. »..—_.„i "�
ClassI ..... ............. » ,... ...„.«..._...»..»._.»...............»......«.«...„.:..„........... 5-25 Points
ClassIL_...».......—.....„ ......... ».»_..„........................ »............. .................. 26-50 Points
Classin .......... „..... „..... „..................................................... ....................... 51.85 Points
ClassN »..»...».....».«................. »._.................. „.......... ...................... _... 66-Up Points
-------------------------------------------------------------
Facilities having a rating of one through four points, Inclusive, do not require a certified operator.
Facilities having an activated sludge process will be asslgned a minimum classtlicatlon of Class IL
Facilities having treatment processes for the removal of metal or cyanide will be assigned a minimum classification of Class IL
Faca$ies having treatment processes for the biological removal of phosphorus Melt be assigned a minimum classifeation of Class 111.
-----------------------------------------------
MU DEFINITIONS
The following definitions shag apply throughout this Subchapter.
(1) Activated Carbon Beds. A physicaVchemical 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 either 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 diffuslon;(3a) Extended
Aeration. An activated sludge process utilizing a minimum hydraulic detention time of 18 hours
(4) Agriculturally managed site. Any she on which a crop is produced, managed, and harvested (Crop Includes grasses, grains, trees, ate.);
(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*achleve "secondary* effluent Qmlts; -
(8) Centrifuge. A mechanical device in which centrifugal force Is used to separate solids from liquids or to separate liquids of different denshlas•
(9) Chemical Addlilon 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 unhs 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 lime, ferric chloride, or a polymer to wet sludge to coalesce the mass prior to
its application to a dewatering device;
(11) Closed Cycle Systems. Use of holding ponds or holding tanks for containment of wastewater containing inorganic, non -toxic 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 SOD and Nitrogenous Removal by Nitrification- A single stage system required to achieve permit effluent 1-units on SOD
and ammonia nitrogon within the same biological reactor,
(13) Dechlortnatlort The partial or complete reduction of residual chlorine in a liquid by any chemical or physical process;
(14) Denhrftication Process. The conversion of nitrate -nitrogen to nitrogen gas;