NC0020940_Wasteload Allocation_19980123

NPDES DOCIMENT 5CANNINO COVER SHEET
NC0020940
Murphy WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Report
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
January 23, 1998
This document ifs printed on reuiae paper - ignore any
content on the re rez-ise side

Staff Review and Evaluation
NPDES Wastewater Permit
FACILITY INFORMATION
Facility Town of Murphy WWTP
NPDES No. NC0020940
Design Flow (MGD) 0.925 MGD
Facility Class II
STREAM CHARACTERISTICS
Stream Name Hiwassee River
Stream Class C
Sub -basin 040502
Drainage Area (mi2) 956
S7Q10 (cfs) 96.9
W7Q10 (cfs) 113
30Q2 (cfs) 245
IWC (%) 1.5
Proposed Changes
Parameters Affected
Basis for change(s)
Installation of Toxicant Limit
Nickel
Reasonable Potential Analysis
Increase in monitoring frequency
Copper and Silver
Reasonable Potential Analyses
Compliance Schedule: None
Special Condition(s): Chronic Toxicity test, P/F Q 1.5%
Permits & Engineering Comments:
Although this application has not been received, there have been no apparent treatment system
modifications during the previous permit cycle. A compliance review indicated that apart from a
toxicity failure last month, this facility has a good toxicity record passing all of its tests for the
past two years. Oxygen consuming wastes have not been a problem nor have nutrients. Toxicants,
however, pose a potential threat to water quality. Reasonable potential analyses for the eight
toxicants monitored in the effluent indicated that a potential for standard violations existed for
nickel, silver and copper. A water quality -based limitation has been installed for nickel.
Because standards do not exist for copper and silver (NC currently has action levels for these two
parameters), two options exist: 1) install permit limitations based on those actions levels, or 2)
increase the monitoring frequency from 2/month to weekly. As this facility has a very good
toxicity record, I recommend increasing the monitoring frequency to weekly. Should toxicity
problems develop at some point in the future, the Division will recommend toxicant sampling
coincide with toxicity testing.
This facility has historically had low organic loading making it quite difficult for them to meet
the 85% removal condition. In fact, this condition was met rarely during the previous cycle.
All other terms and conditions of the previous permit have been carried over with this renewal.
Monitoring frequencies installed in the previous permit were in accordance with the 2B .0500 rules
so not frequency modifications are necessary at this time.

The supplement to permit cover page does not currently mention the presence of dechlorination
facilities. Such facilities have been included in the treatment system description. A site
investigation will help identify currently operating system components.
Prepared by: /��i���JL-�-.
Regional Office Evaluation and Recommendations:

Permit No. NC0020940
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards
and regulations promulgated and adopted by the North Carolina Environmental Management
Commission, and the Federal Water Pollution Control Act, as amended,
Town of Murphy
is hereby authorized to discharge wastewater from a facility located at the
Murphy WWTP
Payne Street
Murphy
Cherokee County
to receiving waters designated as the Hiwassee River in the Hiwassee River Basin
in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I,
II, III, and IV hereof.
The permit shall become effective March 1, 1998
This permit and the authorization to discharge shall expire at midnight on December 31, 2002
Signed this day January 23, 1998
. Preston Howard, Jr. i' .E., Director
Division of Water Quality
By Authority of the Environmental Mangement Commission

Permit No. NC0020940
SUPPLEMENT TO PERMIT COVER SHEET
Town of Murphy
is hereby authorized to:
1. Continue to operate a 0.925 MGD wastewater treatment facility consisting
of an extended aeration plant in parallel with an Aeromod unit, flow
splitters, clarifiers, effluent chlorination and dechlorination, flow
measurement, aerobic sludge digestion and sludge drying beds located at the
Town of Murphy's WWTP, Payne Street, Murphy, Cherokee County (See
Part III of this Permit), and
2.
Discharge from said treatment works at the location specified on the attached
map into the Hiwassee River which is classified C waters in the Hiwassee
River Basin.

A (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
Permit No. NC0020940
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from outfall(s) serial number
001. Such discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location1
Flow (MGD)
0.925
Continuous
Recording
I or E
BOD, 5-day, 20°C2
30.0 mg/L
45.0 mg/L
3/Week
Composite
I, E
Total Suspended Residue2
30.0 mg/L
45.0 mg/L
3/Week
Composite
I, E
NH3-N
3/Week
Composite
_
E
Fecal Coliform (geometric mean)
200 / 100 ml
400 / 100 mi
3/Week
Grab
E
Total Residual Chlorine
28 pg/L
3/Week
Grab
E
Temperature
Daily
Grab
.
E
Total Nitrogen (NO2+NO3+TKN)
Semi-annually
Composite
E
Total Phosphorus
Semi-annually
Composite
E
Lead
2/Month
Composite
E
Cadmium
2/Month
Composite
E
Chromium
2/Month
Composite
E
Nickel
6.0 mg/L
2/Month
Composite
E
Copper
Weekly
Composite
E
•Silver
Weekly
Composite
E
Zinc
2/Month _
Composite
E
Cyanide •
• 2/Month
Grab
E
pH3
3/Week
Grab
E
Chronic Toxicity)
Quarterly
Composite
_
E
Notes:
2
3
4
Sample Locations: E - Effluent, I - Influent
The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15% of the respective influent value (85 % removal).
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored daily at the effluent by grab sample.
Chronic Toxicity (Ceriodaphnia) P/F at 1.5%; March, June, September, December; See condition A(2) of the Supplement to Effluent Limitations page.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit No. NC0020940
SUPPLEMENT TO EFFLUENT LIMITATIONS
AND MONITORING REQUIREMENTS
SPECIAL CONDITIONS
A (2). CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QUATERLY)
The effluent discharge shall at no .time exhibit chronic toxicity using test procedures outlined in the "North Carolina
Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised November 1995, or subsequent versions.
The effluent concentration at which there may be no observable inhibition of reproduction or significant mortality is 1.5%
(defined as treatment two in the procedure document). The permit holder shall perform quarterly monitoring using this
procedure to establish compliance with the permit condition. The tests will be performed during the months of March, June,
September and December. Effluent sampling for this testing shall be performed at the NPDES permitted final effluent
discharge below all treatment processes.
Al] 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, DWQ Form AT-1
(original) is to be sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of
Water Quality
4401 Reedy Creek Rd.
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 there be no discharge of flow from' the facility during a month in which toxicity monitoring is required, the permittee
will complete the information located at the top of the aquatic toxicity (AT) test form indicating the facility name, permit
number. pipe number, county, and the month/year of the report with the notation of "No Flow" in the comment area of the
form. The report shall be submitted to the Environmental Sciences Branch at the address cited above.
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 the permittee fail to monitor during a month in which toxicity monitoring is required, 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 Water Quality
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,
minimum control organism reproduction, 'nd appropriate environmental controls, shall constitute an invalid test and will
require immediate follow-up testing to be completed no later than the last day of the month following the month of the initial
monitoring.

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Facility Name =
NPDES # =
Qw(MGD)=
7010s (cfs)=
IWC(%)=
Town of Murphy, wWTP
NC0020940
0.925
96.9
1.46
FINAL RESULTS
Cadmium
Max. Pred Cw
Allowable Cw
1.3
137.2
Parameter =
Standard =
Cadmium
2
N9A
n BDL=1/2DL Actual Data RESULTS
1 0.5 <1 Std Dev. 0.117752054
2 0.5 <1 Mean 0.528571429
3 0.5 <1 C.V. 0.222774156
4 0.5 <1
5 0.5 <1
6 0.5 <1 Mult Factor=
7 0.5 <1 Max. Value
8 0.5 <1 Max. Pred Cw
9 0.5 <1 Allowable Cw
10 0.5 <1
11 0.5 <1
12 0.5 <1
13 0.5 <1
14 0.5 <1
15 0.5 <1
16 0.5 <1
17 1 1
18 0.5 <1
19 0.5 <1
20 0.5 <1
21 1 1
22 0.5 <1
23 0.5 <1
24 0.5 <1
25 0.5 <1
26 0.5 <1
27 0.5 <1
28 0.5 <1
29 0.5 <1
30 0.5 <1
31 0.5 <1
32 0.5 <1
33 0.5 <1
34 0.5 <1
35 0.5 <1
1.3
1RgA
1.3 pgA
137.2 pgA

Facility Name =
NPDES #
Ow (MGD) =
7010s (cfs)=
IWC(%)=
Town of Murphy. WWTP
NC0020940
0.925
96.9
1.46
FINAL RESULTS
Lead
Max. Pred Cw
Allowable Cw
8.5
1714.6
Parameter=
Standard =
Lead
25
n BDL=1/2DL Actual Data RESULTS
1 3 3 Std Dev. 1.125151717
2 1.5 <3 Mean 2.114285714
3 1.5 <3 C.V. 0.532166353
4 1.5 <3
5 1.5 <3
6 5 5 Mult Factor=
7 1.5 <3 Max. Value
8 1.5 <3 Max. Pred Cw
9 5 5 Allowable Cw
10 1.5 <3
11 1.5 <3
12 4 4
13 1.5 <3
14 1.5 <3
15 1.5 <3
16 1.5 <3
17 4 4
18 4 4
19 4 4
20 1.5 <3
21 1.5 <3
22 1.5 <3
23 3 3
24 1.5 <3
25 1.5 <3
26 1.5 <3
27 1.5 <3
28 1.5 <3
29 1.5 <3
30 1.5 <3
31 1.5 <3
32 1.5 <3
33 1.5 <3
34 1.5 <3
35 3 3
1.7
5 pg/I
8.5 pg/I
1714.6 pg/I

Facility Name
NPDES # =
Qw(MGD)=
7010s (cfs)=
IWC(%)=
Town of Murphy, WWTP
NC0020940
0.925
96.9
1.46
FINAL RESULTS
Chromium
Max. Pred Cw
Allowable Cw
1233.1
3429.3
Parameter
Standard
Chromium
50
Pon
n BDL=1/2DL Actual Data RESULTS
1 2.5 <5 Std Dev. 46.44436448
2 2.5 <5 Mean 15.24285714
3 2.5 <5 C.V. 3.046959244
4 2.5 <5
5 15 15
6 14 14 Mult Factor
7 2.5 <5 Max. Value
8 2.5 <5 Max. Pred Cw
9 2.5 <5 Allowable Cw
10 9 9
11 2.5 <5
12 2.5 <5
13 11 11
14 6 6
15 209 <3
16 192 <3
17 2.5 <5
18 2.5 <5
19 2.5 <5
20 2.5 <5
21 2.5 <5
22 2.5 <5
23 2.5 <5
24 2.5 <5
25 2.5 <5
26 10 10
27 2.5 <5
28 2.5 <5
29 2.5 <5
30 2.5 <5
31 2.5 <5
32 2.5 <5
33 2.5 <5
34 2.5 <5
35 2.5 <5
5.9
209 pgll
1233.1 ltg/
3429.3 ltg/l

Facility Name
NPDES 1/
Ow(MGD)=
7010s (cfs)=
IWC(%)=
Town of Murphy, WWTP
NC0020940
0.925
96.9
1.46
FINAL RESULTS
Nickel
Max. Pred Cw
Allowable Cw
8496
6035.5
Parameter
Standard
n
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
Nickel
88
PO
BDL=1/2DL" Actual Data RESULTS
5 . <10 Std Dev. 293.6700315
5 <10 Mean 98.97142857
5 <10 C.V. 2.967220295
485 485
5 <10
45 45 Mull Factor
5 <10 Max. Value
5 <10 Max. Pred Cw
5 <10 Allowable Cw
5.9
5 <10
5 <10
5 <10
5 <10
12 12
5 <10
5 <10
5 <10
5 <10
1440 1440
5 <10
5 <10
5 <10
5 <10
5 <10
5 <10
5 <10
5 <10
5 <10
855 855
482 482
5 <10
5 <10
5 <10
5 <10
5 <10
1440 pg/I
8496 pg/l
6035.5 pg/I

Facility Name
NPDES # =
Ow (MGD) _
7Q10s (c/s)=
IWC(%)=
Town of Murphy, WWTP
NC0020940
0.925
- 96.9
1.46
FINAL RESULTS
Copper
Max. Pred Cw
Allowable Cw
1174.8
480.1
Parameter =
Standard =
Copper
7
n B0L=1/2DL Actual Data RESULTS
1 16 16 Std Dev. 45.20339189
2 9 9 Mean 22.85714286
3 9 9 C.V. 1.977648395
4 9 9
5 7 7
6 7 7 Mult Factor =
7 10 10 Max. Value
8 28 28 Max. Pred Cw
9 23 23 Allowable Cw
10 12 12
11 25 25
12 9 9
13 12 12
14 73 73
15 32 32
16 13 13
17 11 11
18 9 9
19 267 267
20 2.5 <5
21 6 6
22 8 8
23 20 20
24 9 9
25 8 8
26 40 40
27 7 7
28 7 7
29 8 8
30 5 <10
31 2.5 <5
32 9 9
33 18 18
34 7 7
35 62 62
4.4
267 pg/I
1174.8 pg/I
480.1 pg/I

Facility Name =
NPDES #
Qw(MGM =
7010s (cfs)=
IWC (%) =
Town of Murphy, WWTP
NC0020940
0.925
96.9
1.46.
FINAL RESULTS
Cyanide
Max. Pred Cw
Allowable Cw
41.4
342.9
Parameter =
Standard =
Cyanide
5
NO
n BDL=1/2DL Actual Data RESULTS
1 12 12 Std Dev. 4.600328815
2 8 8 Mean 5.814285714
3 10 10 C.V. 0.791211344
4 9 9
5 2.5 <5
6 2.5 <5 Mult Factor=
7 2.5 <5 Max. Value
8 18 18 Max. Pred Cw
9 2.5 <5 Allowable Cw
10 2.5 <5
11 11 11
12 8 8
13 2.5 <5
14 2.5 <5
15 5 5
16 10 10
17 13 13
18 2.5 <5
19 6 6
20 2.5 <5
21 16 16
22 2.5 <5
23 2.5 <5
24 2.5 <5
25 5 5
26 5 5
27 2.5 <5
28 2.5 <5
29 2.5 <5
30 2.5 <5
31 15 15
32 2.5 <5
33 5 5
34 2.5 <5
35 2.5 <5
2.3
18 pg/I
41.4 pgll
342.9 pg/1

Facility Name
NPDES # =
Ow (MGD)
7Q10s (cfs)=
!WC (%) =
Town of Murphy, WWTP
NC0020940
0.925
96.9
1.46
FINAL RESULTS
Silver
Max. Pred Cw
Allowable Cw
750.4
4.1
Parameter =
Standard =
Silver
0.06
Psi
n BDL=1/2DL Actual Data
1 2 2
2 3 3
3 1 1
4 2 2
5 1 1
6 0.5 <1 Mutt Factor =
7 1 1 Max. Value
8 1 1 Max. Pred Cw
9 134 134 Allowable Cw
10 0.5 <1
11 0.5 <1
12 4 4
13 0.5 <1
14 15 15
15 0.5 <1
16 31 31
17 0.5 <1
18 6 6
19 25 25
20 9 9
21 4 4
22 0.5 <1
23 0.5 <1
24 32 32
25 13 13
26 0.5 <1
27 0.5 <1
28 0.5 <1
29 0.5 <1
30 0.5 <1
31 0.5 >1
32 0.5 <1
33 1 1
34 3 3
35 1 1
RESULTS
Std Dev. 23.41001007
Mean 8.471428571
C.V. 2.763407597
5.6
134 pg/I
750.4 pg/I
4.1 pg/I

11.
Facility Name =
NPDES # =
Qw(MGD)=
7010s (cis)=
1WC(%)=
Town of Murphy. WWTP
NC0020940
0.925
96.9
1.46
FINAL RESULTS
Zinc
Max. Pred Cw
Allowable Cw
582.4
3429.3
Parameter =
Standard =
Zinc
50
NgA
n BDL=1/2DL Actual Data RESULTS
1 5 <10 Std Dev. 55.53079243
2 44 44 Mean 55.51428571
3 5 <10 C.V. 1.000297342
4 5 <10
5 16 16
6 5 <10 Molt Factor=
7 5 <10 Max. Value
8 5 <10 Max. Pred Cw
9 •4 5 4 5 Allowable Cw
10 224 224
11 29 29
12 5 <10
13 33 33
14 19 19
15 206 206
16 108 108
17 121 121
18 86 86
19 79 79
20 42 42
21 5 <10
22 73 73
23 46 46
24 52 52
25 5 <10
26 110 110
27 40 40
28 48 48
29 46 46
30 26 26
31 54 54
32 84 84
33 12 12
34 121 121
35 134 134
2.6
224 pg/l
582.4 pgA
3429.3 pgA

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ROAD CLASSIFICATION
PRIMARY HIGHWAY
HARD SURFACE
SECONDARY HIGHWAY
HARD SURFACE L�
LIGHT -DUTY ROAD, HARD OR
IMPROVED SURFACE
UNIMPROVED ROAD
..r
Latitude 35°05'51 " Longitude 84°02'29"
Map # G2SE Sub -basin 04-05-02
Stream Class C
Discharge Class
99% Domestic. 1 % Industrial
Receiving Stream Hiwassee River
Design Q 0.925 MGD Permit expires 12/3 1/ 02
"1•
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•
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SCALE 1:24 000
0
-• -.. ..- _.tea
0
1 MILE
7000 FEET
1 KILOMETER
=�-- =; 1
1
0
r
1
CONTOUR INTERVAL 40 FEET
Town of Murphy
NC0020940
Cherokee County
WWTP