NC0021865_Wasteload Allocation_19941012

NPDES DOCUHENT :MCANNINO COVER SHEET
NPDES Permit:
NC0021865
Chadbourn WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
October 12, 1994
This document is printed on reuse paper - ignore any -
content on the rererse side

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0021865
PERM11"1EE NAME:
FACILITY NAME:
Town of Chadbourn
Chadbourn Wastewater Treatment Plant
Facility Status: Existing
Permit Status: Renewal
Major Minor
Pipe No.: 001
Design Capacity: 0.50 MGD
Domestic (% of Flow): 100 %
Industrial (% of Flow):
Comments:
7
9/Kfritt
RECEIVING STREAM: Soules Swamp
Class: C-Swamp
Sub -Basin: 03-07-58
Reference USGS Quad: J 23-A 5E_
County: Columbus
Regional Office: Wilmington Regional Office
Previous Exp. Date: 12/31/94 Treatment Plant Class: III
Classification changes within three miles:
None
Requested by: Dana
Prepared
Reviewed by: (�G Z�-�- D te•
olden
(please attach)
Date: 6/8/94
Date: iv
Modeler
Date Rec.
#
Drainage Area (mi2): 5.6 Average Streamflow (cfs): 6.0
s7Q10 (cfs): 0.15
w7Q10 (cfs): 0.2 30Q2 (cfs): 0.2
Toxicity Limits: Chronic (Ceriodaphnia) P / F 84 %
March, June, September, and December
Upstream Location: at least 100' above discahrge (sr_ loos be tit)
*Downstream Location: at least 300' below discharge
Parameters: temperature, dissolved oxygen, fecal coltform,
conductivity
"kit b"k*M momifOQZIt IOC. tiO j FO be &te_e rltNe LN croe4tAVlonj Ai/ 025.,p,,j
Special instream monitoring locations or monitoring frequencies:
Stream samples shall be collected three times per week during June, July,
August, and September and once per week during the remaining months
of the year.
Wasteflow (MGD):
BOD5 (mg/I):
NH3N (mg/I):
DO (mg/I):
TSS (mg/I):
Fecal Col. (/100 ml):
pH (SU):
Residual Chlorine (µg/I):
Oil & Grease (mg/I):
TP (mg/I):
TN (mg/I):
Cadmium (µg/I):
Chromium (µg/I):
Copper (µg/I):
Nickel (µg/l):
Lead (µg/I):
Zinc (µg/I):
Monthly Average
Summer Winter
0.5
5.0
2.0
6.0
30
200
6-9
monitor
nr
monitor
monitor
2.4
60
monitor
105
30
monitor
6.0
4.0
6.0
30
200
6-9
monitor
nr -
monitor
monitor
Daily Maximum
Daily Maximum
Daily Maximum
Daily Maximum
Daily Maximum
Daily Maximum
There shall be no discharge of floating solids or visible foam in other
than trace amounts.
/t►w AIN Fmk

Facility Name:
NPDES No.: NC0021865/,l
Type of Waste: Domestic - fad%
Facility Status: Existing
Permit Status: Renewal
Receiving Stream: Soules Swamp
Stream Classification: C - Swamp
Subbasin: 03-07-58
County: Columbus
Regional Office: Wilmington
Requestor: Bolden
Date of Request: 6 / 9 / 9 4
Topo Quad: J 2 3 NE
FACT SHEET FOR WASTELOAD ALLOCATION
Request # 7867
Chadbourn Waste Water Treatment Plant
0 an U 45P (}6144 �2 M
Industrial - � % - �^-/ 4411\130 ifttYlk, AV-4C114
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Stream Characteristic:
USGS #
Date:
Drainage Area (mi2):
Summer 7Q10 (cfs):
Winter 7Q10 (cfs):
Average Flow (cfs):
30Q2 (cfs):
IWC (%):
5.6
0.15
0.2
6.0
0.2
84 %
Facility does not have Pretreatment Program
Excellent Staff Report
No plans for plant upgrades currently. Facility under SOC to deal with I and I problems, (until 10/31/94).
Town should have already determined if plant upgrades are necessary, (if determined to be necessary,
SOC dates given in Staff Report).
Options of regional connection (City of Whiteville) or spray irrigation are possible.
Request Region recommendations for new instream monitoring sites.
1991 BOD5 and NH3-N data very suspect.
Many flow violations thoughout period printout.
Special Schedule Requirements and additional comments from Reviewers:
Recommended Date: 19 Auausr, 1nig
Farrell Keough
Reviewed by 2'aJ-l/L
Instream Assessment: lDate: 1A27§__
Regional Superv' Date: 9/1/5''r
Permits & Engineering: /. i12�� .12 Gi/�- Date: /6 `f/1r (YC c � / 6/4)
It. z°f (wc.�
SEPi i 9�14
RETURN TO TECHNICAL SUPPORT BY: :

Existing Limits:
CONVENTIONAL PARAMETERS
Monthly Average
Summer Winter
Wasteflow (MGD): 0.5
BOD5 (mg/1): 5.0 6.0
NH3N (mg/1): 2.0 4.0
DO (mg/1): 6.0 6.0
TSS (mg/1): 30 30
Fecal Col. (/100 ml): 200 200
pH (SU): 6- 9 6- 9
Residual Chlorine (µg/1): monitor monitor
Oil & Grease (mg/1): nr nr
TP (mg/1): monitor monitor
TN (mg/1): monitor monitor
• There shall be no discharge of floating solids or visible foam in other than trace amounts.
Recommended Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Col. (/100 ml):
pH (SU):
Monthly Average
Summer Winter
0.5
5.0 6.0
2.0 4.0
6.0 6.0
30 30
200 200
6-9 6-9
WQ or EL
WQ
WQ
AsQ
Residual Chlorine (µg/1): monitor monitor
Oil & Grease (mg/1): nr nr
TP (mg/1): monitor monitor
TN (mg/1): monitor monitor
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Parameter(s) affected: Limits Changes Due To:
(explanation of any modifications to past modeling analysis including new flows, rates, field data,
interacting discharges)
(See page 4 for miscellaneous and special conditions, if applicable)

TOXICS/METALS
Type of Toxicity Test: Chronic (Ceriodaphnia) P / F
Existing Limit 84 %
Recommended Limit: 84 %
Monitoring Schedule: March, June, September, and December
Existing Limits
Daily Max.
COD (mg,/):
Cadmium (µg/1): monitor Quarterly
Chromium (4/1): monitor Quarterly
Copper (µg/1): monitor Quarterly
Nickel (4/1): monitor Quarterly
Lead (4/1): monitor Quarterly
Zinc (µg/1): monitor Quarterly
Cyanide (pg/1): monitor Quarterly
Phenols (µg/1):
Mercury (W):
Silver (µg/l):
Recommended Limits
Daily Max. WQ or EL
COD (me): nr
Cadmium (µg/1): 2.4
Chromium (µg/1): 60
Copper (4/1): monitor
Nickel (µg/1): 105
Lead (1g/1):. 30
Zinc (µg/1): monitor
Cyanide (µg/1):
Phenols (14/1):
Mercury (µg/1):
Silver (4/1):
Cadmium: Max. Pred Cw 50.4 17 values below the detection level of 1.0 p.g/1, but two very recent hits of 9.0 and
Allowable Cw 2.4 5.0 µg/1 increased the Predicted Maximum - limit
Chromium: Max. Pred Cw 101 previous detection levels may have thrown off data. Facility may request re-evaluation
Allowable Cw 59.7 after at least one years worth and twelve seperate sample values - limit
Copper: Max. Pred Cw 41.4
Allowable Cw 8.4 many positive values - current SOP requires monitoring
Cyanide: Max. Pred Cw 2.5 18 data points below detection - delete requirement
Allowable Cw 6.0
Lead: Max. Pred Cw 90 numerous positive values in data evaluated - limit
Allowable Cw 29.8
Nickel: Max. Pred Cw 370 previous detection levels may have thrown off data. Facility may request re-evaluation
Allowable Cw 105 after at least one years worth and twelve seperate sample values - limit
Zinc: Max.PredCw 4,080
Allowable Cw 59.7 many positive values - current SOP requires monitoring
x 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.

INSTREAM MONITORING REQUIREMENTS
Upstream Location: at least 100' above discahrge *
Downstream Location: at least 300' below discharge *
Parameters: temperature, dissolved oxygen, fecal coliform, conductivity
Special instream monitoring locations or monitoring frequencies:
Stream samples shall be collected three times per week during June, July, August, and September and once
per week during the remaining months of the year.
* Facility is currently monitoring at SR 1005 bridge and SR 1429 bridge.
Request Region comment on appropriateness of sites.
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
If no, which parameters cannot be met?
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:
If no, why not?
Special Instructions or Conditions
Wasteload sent to EPA? (Major) (Y or N)
(If yes, then attach updated evaluation of facility, including toxics spreadsheet, modeling
analysisif modeled at renewal, and description of how it fits into basinwide plan)
Additional Information attached? , (Y or N) If yes, explain with attachments.

Facility Name Chadbourn Waste Water Treatment Plant Permit # NC0021865 Pipe # 001
CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY)
The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in:
1.) The North Carolina Ceriodaphnia chronic effluent bioassay procedure (North Carolina Chronic
Bioassay Procedure - Revised *September 1989) or subsequent versions.
The effluent concentration at which there may be no observable inhibition of reproduction or significant
mortality is 84 % (defined as treatment two in the North Carolina procedure document). The permit
holder shall perform quarterly monitoring using this procedure to establish compliance with the permit
condition. The first test will be performed after thirty days from the effective date of this pennit during the
months of Mar., Jun., Sep., and Dec. Effluent sampling for this testing shall be performed at the
NPDES permitted final effluent discharge below all treatment processes.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the month in which it was performed, using the parameter code TGP3B.
Additionally, DEM Fonn AT-1 (original) is to be sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of
Environmental Management
4401 Reedy Creek Road
Raleigh, N.C. 27607
Test data shall be complete and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as all dose/response data. Total residual chlorine of
the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the
waste stream.
Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly monitoring
will begin immediately until such time that a single test is passed. Upon passing, this monthly test
requirement will revert to quarterly in the months specified above.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of
Environmental Management indicate potential impacts to the receiving stream, this permit may be re -opened
and modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival and appropriate environmental controls, shall constitute an invalid test and will require
immediate retesting(within 30 days of initial monitoring event). Failure to submit suitable test results will
constitute noncompliance with monitoring requirements.
7Q10
Permitted Flow
IWC
Basin & Sub -basin
Receiving Stream
County
0.15 cfs
0.5 MG D Recommended b
84 % Farrell Keough
03-07-58
Soules Swamp
Columbus Date Li 4 udool, t9CgLt
QCL PIF Version 9/91

Facility Name:
NPDES No.:
Type of Waste:
Facility Status:
Permit Status:
Receiving Stream:
Stream Classification:
Subbasin:
County:
Regional Office:
Requestor:
Date of Request:
Topo Quad:
Request # 7867
Chadboum Waste Water Treatment Plant
NC0021865
100 % Domestic
Existing
Renewal
Soules Swamp
C - Swamp
03-07-58
Columbus
Wilmington
Bolden
6/9/94
J 23 NE
Stream Characteristic:
USGS #
Date:
Drainage Area (mi2):
Summer 7010 (cfs):
Winter 7010 (cfs):
Average Flow (cfs):
3002 (cfs):
IWC (%):
1993
5.6
0.15
0.2
6.0
0.2
84%
Existing WLA checked:
Staff Report:
Topo checked:
USGS Flows confirmed:
IWC Spreadsheet:
Stream Classification:
Nutrient Sensitivity:
Instream Data:
x
x Excellent Staff Report
x discharge is located in an HA', therefore new flows cannot be determined
nr
X ho A `io oN foie.
x
Brief of WLA Analysis
1976: modeled w/ zero 7010. Limits of 10 / 2 w/ 6 dissolved oxygen.
1980: facility must have upgraded plant, (201 references in limits sheet sent out) currently limited at 5 / 3 w/ 6 dissolved oxygen.
1982: renewed w/ lower USGS flows, (0.0 and 0.1 s/w7010's). Limits of 5 / 2 w/ 6 dissolved oxygen. The discharge receiving
stream underwent a TOT study w/ additional modeling being done. The area was heavily channelized for agricultural runoff,
DO's were low, and aquatic plant growth was heavy.
1984: An Instream Assessment was completed by Trevor Clements to validate the 5 / 2 / 6 limits, (model run attached).
1987: Facility remodeled and Pretreatment information obtained. A new USGS flow request determined the 7010 to -0.15 cfs, (the
error of determination was high enough that a range was given). Nonetheless, the modeling results indicate substandard DO's
under 7010 conditions. Pretreatment indicated the discharge of a pulp and paper facility to the plant. Final WLA
recommendations: 5 (6) / 2 (4) / 6 [summer and winter, respectively], w/ a lead and cyanide limit and other metals monitoring.
1990: SOC for BOD5, NH3-N, cyanide, lead, and toxicity violations. Modeling as well as instream samples indicated substandard
DO's. I and I as well as unaccounted for SIU, (Georgia Pacific) influent were cited as the major problems.
1992: WLA renewed w/ same limits, (lead monitored, cyanide limited). Georgia Pacific, claims that discharge to their plant is
domestic, but no verification existed.
1993: Letter from facility requesting re -assessment of various requirements. Memorandum indicated Pretreatment had dropped
facility to an inactive status. But, due to high actual and predicted levels of cyanide and zinc, continued monitoring was
recommended. Other metals, (Cd, Cr, Cu, Ni, and Pb) were recommended for Qrtly monitoring.
Staff Report
Note on Fact Sheet how good this report is...
No plans for plant upgrades currently. Facility under SOC to deal with land I problems, (until 10/31/94). Town will determine by
5/31/94 if plant upgrades are necessary, (if determined to be necessary, SOC dates given in Staff Report).
Options of regional connection (City of Whiteville) or spray irrigation are possible.
New instream monitoring sites are being reviewed.
DMR's
1991 BOD5 and NH3-N data very suspect.
Many flow violations thoughout period printout.
Many hits on metals, refer Toxic Spreadsheet analysis, (attached). Limit: Cd, Cr, CN, Pb, Ni. Monitor: Zn, Cu,
SOC file
Order given to due inability to comply w/ flow, BOD5 , NH3-N, toxicity, cyanide, and lead limits.
complete storm drain improvements by October 31, 1994 and retest by March 31,1995
determine final plant needs by May 31,1995 and comply with final Permit limits by March 31, 1998.

i tecommenaea j imnsz
Wasteflow (MGD):
BODS (mgll):
NH3N (mg/I):
DO (mg/I):
TSS (mg/1):
Fecal Col. (/100 ml):
pH (SU):
Residual Chlorine (µg/l):
Oil & Grease (mg/1):
TP (mg/1):
TN (mg/1):
Cadmium (µg/I):
Chromium (µg/I):
Copper (µg/I):
Cyanide (µg/l):
Lead (µg/l):
Nickel (µg/I):
Zinc (µg/l):
Monthly Averages
Summer Winter
0.5
5.0
2.0
6.0
30
200
6-9
monitor
nr
monitor
monitor
2.4
60
monitor
nr
30
105
monitor
6.0
4.0
6.0
30
200
6-9
monitor
nr
monitor
monitor
Daily Maximum
Daily Maximum
Daily Maximum
Daily Maximum
WQorEL
Toxicty Test: Chronic (Ceriodaphnia) Toxicity Test P / F at 84 %:
March, June, September, and December
Parameter(s) Affected Requirement Change Due To...
Cd, Cr, Pb, Ni Toxic Spreadsheet Analysis
CN values used for Toxic Spreadsheet were BDL
Upstream Location: at least 100 ' above discharge *
Downstream Location: at least 300' below discharge *
Parameters: Temperature, dissolved oxygen, fecal coliform, conductivity
* Facility is currently monitoring at SR 1005 bridge and SR 1429 bridge.
Request Region comment on appropriateness of sites.

Page 1
Note for Farrell Keough
From: Tom Poe
Date: Aug 19, 1994 4:08 PM
Subject: RE: ASAP
To: Farrell Keough
Chadbourn NC0021865
Reviewed, They currently have NO Pretreatment Program
Georgia Pacific their only SIU was dropped due to discharge of only
domestic wastewater as of Feb 1993 per CD Malone and Steve Long
Whiteville NC0021920
Reviewed, They have good pretreatment/Lab person, Faye Moore
They have LTMP for all parameters
SIUs include Hospital, Metal Finisher, and Prison
They permit 3 NON- SIU Ground Water Remediations
From: Farrell Keough on Fri, Aug 19, 1994 11:27 AM
Subject ASAP
To: Tom Poe
I need to talk with you about my Chadboum and Whiteville recommendations ASAP. I will
be out next week and we want to get these Fact Sheets out today.

March, 1993 through April, 1994
Fadl/tyName = Parameter- Cadmium
WOES #= Standard - 2 µg/I
Ow (MGD) =
70104 (c ak 0.15 cfs n BDL=1/2DL *if 1/2 DL RESULTS
►wC (%) = 83.78 % 1 0.5 Std Dev. 2.2
2 9 Mean 1.4
5 C.V. 1.6
0.5 •
0.5
0.5 • Mull Factor = 5.6
0.5 • Max. Value 9.0 AO
0.5 • Max. Pred Cw 50.4 nil
0.5 • Allowable Cw 2.4 µg/1
0.5
0.5
0.5
0.5
0.5
15 0.5
Copper [Al] Maximum Value 18.o 16 0.5
Max. Pred Cw 41.4 17'('r1oro,Ttrt(bAf)) 0.5
Allowable Cw 8.4 18 2.5
19 2.5
Cyanide Maximum Value 2.5 20
Max. Pred Cw 2.5 t8 ualUE . ZDL, 21
Allowable Cw 6.0 22
23
Lead Maximum Value 25.0 24
Max. Pred Cw 90.0 Nux+EeauJ kRS 25
Allowable Cw 29.8 26
27
Mercury Maximum Value 0.0 28
Max. Pred Cw 0.00 29
Allowable Cw 0.01 30
31
Nickel Maximum Value 74.0 32
Max. Pred Cw 370.0 P Levi°11.3 dc'Xr¢4 is../ 33
Allowable Cw 105.0 1 e>kGs n""31 Lr I! / 34
't LR4Wa 6 dz{n 35
Silver [AL] Maximum Value 0,0 36
Max. Pred Cw 0.00 37
Allowable Cw 0.07 38
39
Zinc [AL] Maximum Value 887.0 40
Max. Pred Cw 4080.2 Iho.d*oir- (5c,)) 41
Allowable Cw 59.7 42
43
Chadbourn Waste Water Treatment Plant
NC0021865
0.50 mgd
Arson lc Maximum Value
Max. Pred Cw
Allowable Cw
Cadmium Maximum Value
Max. Pred Cw
Allowable Cw
Chromlum Maximum Value
Max. Pred Cw
Allowable Cw
FINAL RESULTS
o.o
0.0
59.7
3
4
5
6
7
9.0 8
50.4 9
2.4 to
t1
100.8 peev loos c1ERx-i-• 13
59.7 leu<.tS rn bard ti,eow.4 14
dkut
6/14/94

March, 1993 through April, 1994
Parameter- Chromium
Standard- 50
Pea
n BD6,1/2DL •If 1/2 DL RESULTS
1 2.5 Sid Dev. 6.7
2 2 Mean 7.0
3 8 C.V. 1.0
4 2.5 •
5 2.5 •
6 2.5 Mu/t Factors 3.6
7 2.5 • Max. Value 28.0 pg/1
8 2.5 • Max. Pred Cw 100.8 NA
9 2.5 • Allowable Cw 59.7 yagtl
10 28
11 2.5 •
12 12.5 '
13 12.5 •
14 12.5 •
15 12.5 '
16 12.5 •
17 2.5 •
18 5 *
19 5
20
21
22
23
24
25
28
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
Parameter- Copper [M
Standard - 7
POI
n BDL•1/2DL 'if 1/2 DL RESULTS
1 2.5 • Std Dev. 5.2
2 5 Mean 8.9
3 14 C.V. 0.6
4 5
5 5
6 11 Mult Factor s 2.3
7 17 Max. Value 18.0 $431
8 5 Max. Pred Cw 41.4 µgo
9 13 Allowable Cw 8.4 µgt1
10 12
11 6
12 5
13 18
14 5 •
15 13
18 5 •
17 5 •
18 18
19 5 •
20
21
22
23
24
25
28
27
28
29
30
31
32
33
34
35
38
37
38
39
40
41
42
43
Parameter. Cyanide
Standard - 5
n BDL-1/2DL 'if 1/2 DL RESULTS
1 2.5 Std Dev. 0.0
2 Mean 2.5
3 2.5 • C.V. 0.0
4 2.5 •
5 2.5 •
6 2.5 • Mult Factor at 1.0
7 2.5 • Max. Value 2.5 µgi1
8 2.5 • Max. Pred Cw 2.5 pgf
9 2.5 • Allowable Cw 6.0 pgf
10 2.5 •
11 2.5
12 2.5 •
13 2.5 •
14 2.5 •
15 2.5
16 2.5 •
17 2.5 '
18 2.5 •
19 2.5 •
20
21
22
23
24
25
28
27
28
29
30
31
32
33
34
35
38
37
38
39
40
41
42
43
8/14/94

March, 1993 through April, 1994
Paameter- Lead
Standard- 25
n BDL-1/2DL if 1/2 DL RESULTS
1 5 * Std Dev. 7.5
2 1 Mean 7.3
3 13 C.V. 1.0
4 19
5 5
6 5 • Mutt Factor - 3.6
7 5 • Max. Value 25.0 pgrl
e 5 • Max. Pred Cw 90.0 pert
9 5 * Allowable Cw 29.8 pert
10 5 •
11 5
12 5
13 1.5
14 5
15 1.5 *
16 1.5 '
17 1.5 •
18 25 '
19 25
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
38
37
38
39
40
41
42
43
Parameter- Nickel
Standard - 88 µgA
n BDL-1/2DL *if 1/2 DL RESULTS
1 2.5 • Std Dev. 19.9
2 0.5 • Mean 14.4
3 6 C.V. 1.4
4 2.5 •
s 27
e 2.5 • Mult Factor- 5.0
7 2.5 • Max. Value 74.0 NA
8 2.5 • Max. Pred Cw 370.0 µen
9 2.5 • Allowable Cw 105.0 µen
10 8
tt 2.5
12 12.5 •
13 25
14 12.5 •
is 12.5 •
18 59
17 74
18 10 •
19 10 •
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
3e
37
38
39
40
41
42
43
Parameter- Zinc [AL]
Standard - 50
n BDL-1/2DL 'if 1/2 DL RESULTS
1 12.5 Std Dev. 254.9
2 22 Mean 193.4
3 104 C.V. 1.3
4 176
5 58
e 76 Mult Factor - 4.6
7 101 Max. Value 887.0 Agri
8 51 Max. Prod Cv 4080.2 Agri
9 65 Allowable Cw 59.7 Agri
10 146
11 47
12 235
13 154
14 887
15 153
is 643
17 696
18 34
19 14
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
38
37
38
39
40
41
42
43
8114194

Chadbourn Waste Water Treatment Plant NC0021865
Upstream: SR 1005 bridge
Month Temp DO
Feb-94
Jan-94
Dec-93
Nov-93
Oct-93
Sep-93
Aug-93
Jul-93
Jun-93
May-93
Apr-93
Mar-93
7
11
17
8
14
20
21
25
22
16
16
15
7.1
5.6
1.2
2.6
1.4
2.4
1.4
2.2
4.7
3.1
4.1
6.3
Saturation
58%
51%
12%
22%
14%
26%
16%
27%
54%
31%
42%
63%
Fecal Conductivity
270
266
90
125
203
258
850
42
179
110
322
2,437
Downstream: SR 1429 bridge
Temp DO
6
12
19
10
12
20
21
25
21
17
15
14
9.2
3.7
3.5
6.1
5.3
3.7
1.6
4.1
4.6
4.6
6.8
7.0
Saturation Fecal Conductivity
74%
34%
38%
54%
49%
41%
18%
50%
52%
48%
67%
68%
32
30
32
8
52
108
70
26
156
29
5
16
Ammonia [2 / 4 mg/I] - Residual Chlorine - Fecal Coliform
Instream Waste Concentrations
Residual Chlorine
7Q10 (cfs)
Design Flow (mgd)
Design Flow (cfs)
Stream Std (µg/I)
Upstream bkgrd level (µg/1)
IWC (%)
Allowable Concentration (µg/I)
Albwabie Concentratbn (mgA)
Fecal Limit
Ratio of 0.2 :1
0.2
0.5
0.774
17
0
83.8%
20.3
0.020
200/100m1
0.2
0.5
0.774
1
0.22
83.8%
1.2
0.2
0.5
0.774
1.8
0.22
79.5%
2.2
Ammonia as NH3
(summer)
7Q10 (cfs)
Design Flow (mgd)
Design Flow (cfs)
Stream Std (mg/I)
Upstream bkgrd level (mg/I)
IWC (%)
Allowable Concentration (mg/I)
Ammonia as NH3
(winter)
7Q10 (cfs)
Design Flow (mgd)
Design Flow (cfs)
Stream Std (mg/I)
Upstream bkgrd level (mg/I)
IWC (%)
Allowable Concentration (mg/I)
>nZ ly2`t
6/14/94

DIVISION OF ENVIRONMENTAL MANAGEMENT
April 30, 1993
MEMORANDUM
TO: Charles Lowe ,,, I Q
FROM: Susan A. Wilson , ?
THROUGH: Ruth Swanek VC.S
Carla Sanderson
SUBJECT: Town of Chadbourn (NPDES No. NC0021865)
Soules Swamp, Lumber River Basin
Columbus County
The Technical Support Branch (TSB) has the following comments with regard to the Town
of Chadbourn's inquiry on the proposed permit limits:
TSB has received new information with regard to the facility's pretreatment program. As
of February 26, 1993, the Division has inactivated the facility's pretreatment program. A
regional inspection was performed and supporting data and information were sent in
regarding the domestic status of Chadbourn's only remaining SIU. From this information,
the Pretreatment Unit concluded that the pretreatment program was no longer necessary.
The facility has consistently had values above detection level for zinc. Cyanide values were
also above detection level in some cases, and, due to the low dilution ratio, the effluent
values approached the predicted allowable levels to protect the instream water quality
standard. However, this has only occurred three times in the past year. Due to the fact that
there are no SIU's contributing to the plant any longer, TSB recommends monitoring
only for zinc and cyanide in accordance with the classification of the facility. TSB
recommends cadmium, chromium, copper, nickel, and lead monitoring be conducted
quarterly; these metals have been near or below detection level for the past year.
The current design capacity of the plant is 0.5 MGD, as stated in the staff report. TSB
cannot agree with the facility's request of 0.8 MGD permitted flow without expansion of
the plant, since this would exceed the hydraulic capacity of the existing plant.
cc: Dave Adkins, WiRO
Tom Poe, Pretreatment Unit

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Ms. Coleen Sullins
NPDES Permit Group
P.O. Box 27687
Raleigh, NC 27611-7687
Dear Ms. Sullins,
TOWN OF
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DBOURN
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'TH CAROLINA 28431
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This letter is to express the Town of Cf,adbourn's concerns pertaining to the NPDES Draft
Permit No. NC0021865.
A detailed review of the Draft NPDES Permit revealed several areas of concern. The
Town of Chadbourn has formally requested that it's Wastewater Treatment Facility be re-
evaluated for classification purposes. This request was made to Mr. Dave Atkins of the
Wilmington Regional Office.
In the request, the areas of concern were the Industrial Pretreatment program and the
Land Application program. Enclosed with this letter is a copy of that request.
The area of concern pertaining to the Draft NPDES permit is that of increased monitoring
and sampling. The Town of Chadbourn is currently involved in an Inflow and Infiltration
project. The Town is having problems funding this project. The increase in sampling and
monitoring costs from twice a month to three times a week would only complicate matters.
The Town of Chadbourn formally requests that it's wastewater treatment facility be re-
evaluated and classified as a Grade Two (2) plant. Once the plant has been re-classified,
the Town requests that the Grade two (2) sampling and monitoring schedule be
implemented.
The Town of Chadbourn requests that the daily maximum limitation for Cyanide be "
revised and additional sampling frequency be reduced to a one time per month basis.
Based on historical monitoring data, the Town of Chadbourn cannot comply with the
permitted flow of .50 MGD. After the completion of the Inflow and Infiltration project,
the Town still projects a flow of .80 MGD. Thus, the Town of Chadbourn requests the
permitted flow be increased to .80 MGD. � �� - 6.B
.k.‘( y
I trust you would favorably review our requests. I would be happy to meet with you and
discuss our requests in detail.
a45•

If you have any questions or require additional information, please advise.
Sincerely,
Town of Chadbourn
Bud Birmelin
Town Manager
cc: Al Norris
Chris Marion
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