NC0039594_Wasteload Allocation_19950327

NPDES DOCUHENT SCANNING: COVER SHEET
NC0039594
Maiden WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
rc?x"�`Fh9Mdas(gvr .t1WFWMY%v rxi'-'^'"'r`'Y
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
March 27, 1995
Thies document is printed on reins paper - igriore any
content on the reiterese side

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0039594
PERMf1"LEE NAME:
FACILITY NAME:
Town of Maiden
Maiden Wastewater Treatment Plant
Facility Status: Existing
Permit Status: Renewal
Major Minor
Pipe No.: 001
Design Capacity: 1.00 MGD
Domestic (% of Flow): 99.50 %
Industrial (% of Flow): 0.50 %**
Comments:
**Based on 1.0 MGD and reported 5000 GPD from SIU.
RECEIVING STREAM: Clark Creek
Class: C
Sub -Basin: 03-08-35
Reference USGS Quad: E 14 SW (please attach)
County: Catawba
Regional Office: Mooresville Regional Office
Previous Exp. Date: 7/31/95 Treatment Plant Class: IV
Classification changes within three miles:
Requested by: /1 Charles Alvarez Date: 10/17/94
Prepared by: ( /• / Date: 3/zz/%s
Reviewed (3721d&t8y Date 3/
3i l JfS,
Modeler
Date Rec.
#
SM,v
tO\ (81 g4'
•(' -3
Diainage Area (mil ) 4 6
Avg. Streamflow (cfs): 77
7Q10 (cfs) /2- Winter 7Q10 (cfs) 2z 30Q2 (cfs)
Toxicity Limits: IWC % Acut /Chroni
Instream Monitoring:
Parameters
Upstream Location
Downstream Location
Effluent
Characteristics
Summer
Winter
BOD5 (mg/1)
36
NH3-N (mg/1)„
D.O. (mom)
A/
TSS (mg/I)
30
F. Col. (/100 ml)
za o
pH (SU)
G - 9
LLkf el^',1£(udl�
I£A0( (at)
.219
GrAiAl
,7
2r„ C lL
( rikt
? Cd.
Comments:

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:
FACT SHEET FOR WAS 1ILOAD ALLOCATION
Town of Maiden WWTP
NC0039594
99.5% Domestic / 0.5% Industrial
Existing
Renewal
Clark Creek
C
030835
Catawba
Mooresville
Alvarez
10/18/94
E14SW
Request # 8034
Stream Characteristic:
USGS #
Date:
Drainage Area (mi2):
Summer 7Q10 (cfs):
Winter 7Q10 (cfs):
Average Flow (cfs):
30Q2 (cfs):
IWC (%):
66
12
22
77
11.4
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Facility interacts with Newton -Clark Creek WWTP and Delta Mills facility. Tech Support
recommends renewal of existing limits (30/30) for conventional parameters . New toxicity analysis
indicates revision of metals and toxics limits. Recommend effluent limit for lead and monthly
monitoring for zinc.
Special Schedule Requirements and additional comments from Reviewers:
Recommended by:
Reviewed by
Instream Assessment:
Regional Supervisor
Permits & Engineering:
Date: /.201---
Daw:3/d. /t
Date: /3/f'S'
Date: 20(9,5
RETURN TO TECHNICAL SUPPORT BY: APR 0 2 1995
N.C. DEPT. OF
ENVIRONMENT, HEALTH.
& NATURAL RESOURCES
MAR 8 1995
VISION OF ENVIRONMENTAL MANAGEMENT
O RESVILLE. REGIONAL OFFICE

2
CONVENTIONAL PARAMETERS
Existing Limits:
Monthly Average
Summer Winter
Wasteflow (MGD): 1.0
BOD5 (mg/1): 30
NH3N (mg/1): monitor
DO (mg/1): nr
TSS (mg/1): 30
Fecal Col. (/100 ml): 200
pH (SU): 6-9
Residual Chlorine (14/1): monitor
TP (mg/1): monitor
TN (mg/1): monitor
Recommended Limits:
Monthly Average
Summer Winter WQ or EL
Wasteflow (MGD): 1.0
BOD5 (mg/1): 30
NH3N (mg/1): monitor
DO (mg/1): nr
TSS (mg/1): 30
Fecal Col. (/100 ml): 200
pH (SU): 6-9
Residual Chlorine (14/1): monitor
TP (mg/1): monitor
TN (mg/1): monitor
Limits Changes Due To: Parameter(s) Affected
Change in 7Q10 data
Change in stream classification
Relocation of discharge
Change in wasteflow
Other (onsite toxicity study, interaction, etc.)
Instream data
New regulations/standards/procedures
New facility information
(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)
Face yi s (3
1 6 nda,ic/ (404,
y6
ed f r i4.6 4 Ammt) uu, 4 .
c4-0444-8,AL_) a n_ j i 64 7'- maxi/

Type of Toxicity Test:
Existing Limit:
Recommended Limit:
Monitoring Schedule:
Existing Limits
Cadmium (ug/1):
Chromium (ug/1):
Copper (ug/l):
Nickel (ug/l):
Lead (ug/1):
Zinc (ug/1):
Cyanide (ug/l):
Silver (ug/l):
Recommended Limits
TOXICS/METALS
Chronic Ceriodaphnia Qrtrly
11%
11%
JAN APR JUL OCT
Daily Max. WQ or EL
monitor
monitor
monitor
monitor
monitor
monitor
44 WQ
monitor
Daily Max. WQ or EL
Lead (ug/l): 219 WQ
Zinc (ug/l): monthly monitor
Limits Changes Due To:
Change in 7Q10 data
Change in stream classification
Relocation of discharge
Change in wasteflow
New pretreatment information
Failing toxicity test
Other (onsite toxicity study, interaction, etc.)
Parameter(s) Affected
/rn0u.c�
V1,-1.41".4rY1A)1-
_X_ ?Kitt 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.
OR
Cd,Cr,Ni,Cn,Cu will be
monitored in LTMP.
No parameters are water quality limited, but this discharge may affect future allocations.

4
INSTREAM MONITORING REQUIREMENTS
Upstream Location: 100 ft. above the outfall, below Delta Mills discharge
Downstream Location: State Road 1282
Parameters: Temperature, DO, Fecal Coliform, Conductivity, BOD5, NH3
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
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 schematic, toxics spreadsheet, copy of model, or, if not modeled, then old
assumptions that were made, and description of how it fits into basinwide plan)
Additional Information attached? (Y or N) If yes, explain with attachments.

Facility Name Maiden WWTP Permit # NC0039594 _ 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 _11 % (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 permit during the months of
JAN APR JUL OCT .. 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 Form 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 12 cfs
Permitted Flow 1.0 _ MGD
IWC 11 %
Basin & Sub -basin CTB35
Receiving Stream Clark Creek
County Catawba
QCL PIF Version 9/91

MAIDEN WWTP JMN
Clark Creek 12/1/94
030835
The facility is requesting renewal of existing NPDES permit. Maiden plant has 1 MGD
capacity and is located on Clark Creek, also interacts with Newton and Delta Mills. Delta
Mills has relocated approximately 200 ft upstream of Maiden's outfall from it's previous
discharge point on Shady Branch.
Level B model run for Clark Creek dischargers predicts DO sag of 5.55 mg/1 occurs 1.7
miles below Newton's 5 MGD discharge ( This is 2.3 mi. above Delta Mills discharge).
Second DO sag of 5.17 mg/1 occurs 5 miles below the discharges of Delta Mills and
Maiden. Predicted DO in Clark Creek before entering South Fork Catawba River is 5.5
mg/l. These predictions indicate that assimilative capacity in Clark Creek may be
exhausted.
Maiden appears to be a well operated plant with no permit violations since May 1990. A
review of compliance data show only three exceedances of BOD5 and TSS between 12/89
and 5/90. Summer/ Winter NH3 toxicity limits of 7 and 24 mg/1, respectively have not
been assigned because Maiden has consistently passed the whole effluent toxicity test.
However it should be noted that the average NH3 concentration for the past year is 15.5
mg/1 with a maximum of 33.5 mg/1. In addition, the average chlorine concentration is
0.577 mg/1 and Maiden should be looking at reducing residual chlorine levels to 28 ug/1 for
protection of instream toxicity.
Since it started the whole effluent toxicity test @ 11% in Jan. 1990 have had only two
failures. Town has only one significant user, Getrag Gears. New toxicity analyses has
indicated that several parameters recommended for monitoring at last WLA review in 1992
can now be deleted. Effluent limit for cyanide can be deleted.
Conference w/ Pretreatment: Joe Pearce says Maiden will be given the option of going to
the Short Tenn Monitoring Program, monitoring for 4 consecutive days once every five
years. They will monitor for Cn, Cd, Cr, Cu. Pb, Zn, Se, and Molybdenum. Concurs
with tox analysis giving only lead limit and zinc monitoring. Says Maiden has very tight
limits on the one industry (makes transmissions for BMWs) and the operator is very
conscientous. DMRs do report compliance problems on Monday mornings, suspects that
someone is slugging the plant on Mondays.
Recommendation: Renewal of existing limits for conventional parameters:
Secondary limits (30/30), fecal limit of 200/100m1, effluent monitoring for
NH3 and residual chlorine, pH = 6-9 SU.
Recommend renewal of Instream monitoring for Temperature, DO*, Fecal
coliform, Conductivity, BODS and NH3.
*Facility has not been monitoring for instream DO. because it was omitted
from the 1993 permit.
New effluent limitations and monitoring requirements for metals and
toxicants include:
Lead limit = 218 µg/1
Monthly monitoring for zinc.

TOXICANT ANALYSIS
Facility Name
Maiden WWTP
NPDES #
NC0039594
Qw (MGD)
1
7Q10s (cfs)
.._.._.._.._.._.._.._.._. 12
_.._.._.._..11.44
Clark Creek
WC (%)
Rec`ving Stream
Stream Class
C
FINAL RESULTS
Cyanide
Max. Pred Cw
26
Allowable Cw
43.7
Cadmium
Max. Pred Cw
3.5
Allowable Cw
17.5
Chromium
Max. Pred Cw
10
Allowable Cw
437.1
Copper
Max. Pred Cw
45
Allowable Cw
61.2
Lead
Max. Pred Cw
390
Allowable Cw
-218.5
Nickel
Max. Pred Cw
10
Allowable Cw
769.3
Silver
Max. Pred Cw
3
Allowable Cw
0.5
Zinc
Max. Pred Cw
f475
Allowable Cw
as 437.1
0
Max. Pred Cw
0
Allowable Cw
0.0
0
Max. Pred Cw
0
Allowable Cw
0.0
0
Max. Pred Cw
0
Allowable Cw
0.0
0
Max. Pred Cw
0
Allowable Cw
0.0
try a 30
ate e ,
/vim• a f r �'►"mt.-�
Yw Apt-
4(/ vim-'- ADC_
0
4lf vim*..- jL p. pralfrAL r7
v (WA, f31XL.
11 /21 /94
PAGE

MAIDEN WWTP
Residual Chlorine
7010 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (UG/L)
UPS BACKGROUND LEVEL (UG/L)
IWC (%)
Allowable Concentration (ug/1)
Fecal Limit
Ratio of 7.7 :1
Ammonia as NH3
(summer)
12 7010 (CFS)
1 DESIGN FLOW (MGD)
1.55 DESIGN FLOW (CFS)
17.0 STREAM STD (MG/L)
0 UPS BACKGROUND LEVEL (MG/L)
11.44 IWC (%)
148.61 Allowable Concentration (mg/I)
Ammonia as NH3
(winter)
7010 (CFS)
200/100m1 DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
UPS BACKGROUND LEVEL (MG/L)
IWC (%)
Allowable Concentration (mg/l)
12
1
1.55
1.0
0.22
11.44
7.04
22
1
1.55
1.8
0.22
6.58
24.23
NC0039594
1 1/2 1/94

To: Permits and Engineering Unit
Water Quality Section
Attention: Charles Alvarez
i
rYE
SOC PRIORITY PROJECT: No
Date: October 20, 1994
NPDES STAFF REPORT AND RECOMMENDATIONS
County: Catawba
NPDES Permit No.: NC0039594
MRO No.: 94-210
PART I - GENERAL INFORMATION
1. Facility and Address: Town of Maiden WWTP OCT 2 1 1994
Post Office Box 125,4.., .
Maiden, N.C. 2 8p50 't‘ vtireijef j omive,}}--
2. Date of Investigation: October 18, 1994
3. Report Prepared By: Michael L. Parker, Environ. Engr. II
4. Person Contacted and Telephone Number: Mike Lingerfelt, ORC
[phone].
5. Directions to Site: From the jct. of Main Street and South
"E" Avenue in the Town of Maiden, travel west on South "E"
Avenue x 0.2 mile and turn right onto Finger Street. The
WWTP is located at the end of Finger Street.
6. Discharge Point(s), List for all discharge Points:
Latitude: 35* 34' 35"
Longitude: 81° 14' 26"
Attach a USGS Map Extract and indicate treatment plant site
and discharge point on map.
USGS Quad No.: E 14 SW
7. Site size and expansion area consistent with application:
Yes. Very limited area is available for expansion.
8. Topography (relationship to flood plain included): Hilly
topography changing rapidly to flood plain adjacent to the
WWTP site.
9. Location of Nearest Dwelling: No dwellings are located
within 1000 feet of the WWTP site.

Page Two
10. Receiving Stream or Affected Surface Waters: Clark Creek
a. Classification: C
b. River Basin and Subbasin No.: Catawba 030835
c. Describe receiving stream features and pertinent
downstream uses: The receiving stream is 20-25 feet
wide and variable in depth. Upstream dischargers are
Duck Head Apparel and City of Newton. The receiving
stream is discolored by the discharge from Duck Head
Apparel.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a, Volume of Wastewater: 1.0 MGD (Design Capacity)
b. What is the current permitted capacity: 1.0 MGD
c, Actual treatment capacity of current facility (current
design capacity): 1.0 MGD
d. Date(s) and construction activities allowed by previous
ATCs issued in the previous two years: The Town has
received an ATC for the construction of dechlorination
facilities.
e. Description of existing or substantially constructed
WWT facilities: The existing WWT facilities consist of
influent pumps followed by mechanical screening, grit
removal, instrumented flow measurement, dual 0.5 MGD
pure oxygen treatment units each containing aeration
(diffused), clarification, and aerobic digestion. The
facility also has sludge drying beds, effluent
disinfection (gas), and stand-by power.
f. Description of proposed WWT facilities: Dechlorination
facilities are to be constructed in the near future.
g Possible toxic impacts to surface waters: This facility
has consistently passed its toxicity testing for the
past three (3) years.
h. Pretreatment Program (POTWs only): Approved (only one
permitted SIU).
2. Residual handling and utilization/disposal scheme: Residuals
are monofilled as authorized by Permit No. WQ0002915.
3. Treatment Plant Classification: Less than 5 points; no
rating (include rating sheet). Class IV
4. SIC Code(s): 4952
Wastewater Code(s): 01
5.
MTU Code(s): 14002

Page Three
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant
Funds or are any public monies involved (municipals only)?
Public monies were used in the construction of this
facility.
2. Special monitoring or limitations (including toxicity)
requests: None at this time.
3. Important SOC/JOC or Compliance Schedule dates: N/A
4. Alternative Analysis Evaluation: N/A
PART IV - EVALUATION AND RECOMMENDATIONS
The Town of Maiden requests renewal of the subject NPDES
Permit. There have been no changes to the existing WWT facilities
since the Permit was last renewed, however, the construction of
dechlorination facilities is planned in the near future. The Town
is presently operating only one of the two pure oxygen treatment
units due to low influent flow.
The revised WLA has not as yet been received in this Office
for review. If additional limitations (such as NH; as N) are
added, the Town most likely will not be able to comply and will
require the construction of additional WWT facilities. If such is
the case, a compliance schedule placed in the Permit will be
recommended.
Pending receipt andapproval of the WLA, it is recommended
that the Permit be renewed as requested.
4247.-/eee..4
Signature of eport Preparer Date
V . fL ' /c)/2-0-
Water Quality R'ional Supervisor Date