NC0026646_Return_19901214

NPDES DOCUMENT SCANNING COVER SHEET
NPDES Permit:
NC0026646
Pilot Mountain WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
ffe him
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
December 14, 1990
This document is printed on reu$e paper - ignore any
content on the re'rerse side

*le
State of North Carolina
Department of Environment, Health, and Natural Resources
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Governor George T. Everett, Ph.D.
William W. Cobey, Jr., Secretary Director
December 14, 1990
Mr. Billy T. Pell, Town Manager
Town of Pilot Mountain
PO Drawer AA
Pilot Mountain, NC 27041
Dear Mr. Pell:
03-o'1-a'5
Subject: NPDES Permit No. NC0026646
Town of Pilot Mountain
Surry County
''ems Gria„
Reference is made to your NPDES permit application received on May 21, 1990. The
-Division of Environmental Management (DEM) has previously submitted a list of speculative
permit limits per your request by letter dated August 28, 1990 (copy attached). A request was
made at this time that the Town of Pilot Mountain notify the DEM within thirty days if the town
wished to proceed with a permit modification.
Because a response to our request has not been received, the Division of Environmental
Management is returning your application. A copy of your application has been submitted to our
Central Files for future reference.
Should you desire to reactivate your permit request, please advise the Division of
Environmental Management in writing and resubmit a new complete application with the
appropriate application fees. As the effluent limits listed in the letter of August 28, 1990 were
speculative limits, they are not binding and could change on a subsequent application.
If you have any questions, please cont � . Rosanne Barona a 919/733-5083.
Si erely,
Don Saf
Permits a Enoineer n• nit
cc: Winston-Salem Regional Office
Mr. Trevor Clements
Mr. Jim Patrick, EPA
Pollution Prevention Pays
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

1
ti7
RFTTIVFD
AUG 2 9 1990
State of North Carolina
Department of Environment, Health, and Natural.t ?ur' es'` p
Division of Environmental Management '''� - o�iPJ►j BRANCH
512 North Salisbury Street ' Raleigh, North Carol_a 27611
James G. Martin, Governor George T. Everett, Ph.D.
William W. Cobey, Jr., Secretary Director
August 28,1990
Mr. Billy T. Pell, Town Manager
Town of Pilot Mountain
PO Drawer AA
Pilot Mountain, NC 27041
Subject: NPDES Permit Application
NPDES Permit No. NC0026646
Town of Pilot Mountain
Surry County
Dear Mr. Pell:
Reference is made to your NPDES permit application received May 21, 1990. Per your request,
the proposed effluent limitations for a discharge into Toms Creek rather than into Heatherly Creek
are listed below:
Parameter
Summer Limitations Winter Limitations Units
Wasteflow 1.5 1.5 MGD
BOD5 30.0 30.0 mg/1
NH3N 14.0 no limit mg/1
Total Suspended Solids 30.0 30.0 mg/1
Fecal Coliform 200.0 200.0 / 100 ml
pH 6.0 to 9.0 6.0 to 9.0 su
Cadmium 7.0 7.0 1-tg/1
Chromium 178.0 178.0 110
Nickel 312.0 312.0 141
Lead 89.0 89.0 µg/1
Cyanide 18.0 18.0 µg/1
Mercury 0.043 0.043 µgll
Chlorine* 28.0 28.0 µg/l
Toxicity Testing Chronic/ Ceriodaphnia - no significant mortality at IWC = 28%
*Chlorine limit applies if the facility is updated
Metals limits and the chlorine limit are daily maximums; other limits are monthly averages.
Pollution Prevention Pays
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

Please note that these are speculative limits and are not binding unless the limits are part of an
issued NPDES permit. Please notify the Division of Environmental Management within thirty days
if the Town of Pilot Mountain wishes to proceed with the permit application. The project will be
returned at the end of the thirty day period unless the Division is notified to proceed with the permit.
If you have any questions, please contact me at 919/ 733-5083.
Sincerely,
Rosanne Barona
Environmental Engineer
cc: Winston-Salem Regional Office
Trevor Clements - TSB
Permit File

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0026646
PERMITTEE NAME:
Town of Pilot Mountain / Pilot Mountain
Facility Status: Existing
Permit Status: Modification
Major Minor
Pipe No.: 001
Design Capacity: 1.5 MGD
Domestic (% of Flow): 44.5 %
Industrial (% of Flow): 55.5 %
Comments:
proposed new discharge point - for information only
RECEIVING STREAM: Toms Creek
Class: C
Sub -Basin: 03-07-03
Reference USGS Quad: B 16 NE
County: Surry
Regional Office:
Winston-Salem Regional Office
(please attach)
Previous Exp. Date: 1/31/92 Treatment Plant Class: Class 3
Classification changes within three miles:
none. _.
Requested by:
Prepared by:
Reviewed by: 0_0.lZ
OTZ
PLOTTE
Rosanne Barona Date: 5/30/90
Date:
Date:0 (41('! 6
Modeler
Date Rec.
#
COA j
5/3//o
51 Z.o
2
Drainage Area (mi ) 3 3.5- Avg. Streamflow (cfs): 0
7Q10 (cfs) ,3 Winter 7Q10 (cfs) /(, $7 30Q2 (cfs) —
Toxicity Limits: IWC a8 % Acute(ChronicM
Instream Monitoring:
Parameters- Ut Test ,1d , feu.( ('�
Upstream t/ Location .A- Cort�(_ u-E [ s C-e..
Downstream ✓ Locations-R. l8tiu
Effluent
Characteristics
Summer
Winter
BOD5 (mg/1)
3 ()
3 6
NH -N (mg/1)
// 1
D.O. (mg/1)
TSS (mg/1)
>
30
F. Col. (/100 ml)
,.200
pH (SU)
6 _ /
METAL-s (tcg10
daily wtrac. .
Mom iroe.
netk..,:u..w- 7
CyaKick 12
('appee
biro n igvs.- 17O
(4vrury . 643
Ot iic
W cke,l 3 la
Si fiver
I-e ad 8°t
Comments: Mur44e.416 , Cklonvte 4-016c.el kelL
4-e5{- covers 1 i -N ; w:li cece;ve clnkry iw LA -Tr
it-1 UPD4-r17- ritett_ rrY, ' 5caoetto rom as 03'1-mom-

NPDES PRETREATMENT INFORMATION REQUEST FORM
egr
9oosat off'
Cd
Cr
Cu
Ni
Pb
Zn
CN
Phenol
Other L.1.,.
A-3
FACILITY NAM: To/ irr ?iht M'DLUI la. /' NPDFs NO. NCO 0
RDQ[IF,SThlt : �p.S R Nn e &Wait& DATE : 2
5 / / / RBGION : . l�, #56k gedehtt
PERMIT CONDITIONS COVERING PRF;TRFATMFNT
This facility has no SIUs and should not have pretreatment language.
This facility should and/or is developing a g
Please include the following�' g Pretreatment program,
conditions:
Program Development
Phase I due / /
Phase II due / /
Additional Conditions
This facility is currently(attached)
Please include the following conditions:a pretreatment program.
Program Implementation
Additional Conditions
(attached)
IGJIFICANr INDUSTRIAL USERS' (SIUs) CONTRIBUTIONS
SIU FIER - TOTAL:
- COMPOSITION:
TEXTILE T:
�+� MEAL FINISHING :
/ ER O1: `%I/ii/ 1Nw1. / _ .1- _ .
g3Z MGD
13
I!.P, l
MGD
MGD
MGD
MGD
MGD
rIGD
FiEADWORKs REVIEW
PARAMETER
- -----DAILY
ALLOWBLE DOMESTIC
19 ().00
I. 57
n.00
0.03
697 oi
.99 0. 0/
0.02,
o0oe
0.00
LOAD IN LBS/DAY---
P RESERVE BASIS 1
1.35 0.039 Gj_
/ . 35 o. a 9.2 '76
/. /6 0. r135- SA.
. 43 g O. 1-b 3a.
.454 0.471-aa g/
1. 31 I • /GI 7
.069 0• 003 _59
O.W9
D. o/ a. SRO
a, os8
DIVED: 5/gLf/ c/0 REVIEWED BY : C - 7 GL RE'IUI E D
: ,5- iattigo

Request No.
WASTELOAD ALLOCATION APPROVAL FORM
Facility Name:
NPDES No.:
Type of Waste:
Status:
Receiving Stream:
Classification:
Subbasin:
County:
Regional Office:
Requestor:
Date of Request:
Quad:
5720
Pilot Mountain WWTP
NC0026646
44.5% Domestic/55.5% Industrial
Existing/Modification Winston-Salem
Tom' s Creek Regional Office
NCO
C
30703
Surry
Winston-Salem
Rosanne Barona
5/30/90
B16NE
RECOMMENDED EFFLUENT
Wasteflow (mgd) :
BOD5 (mg/1) :
NH3N (mg/1) :
DO (mg/1):
TSS (mg/1) :
Fecal coliform (#/100m1):
pH (Su):
Drainage
Summer
Winter
Average
LIMITS
summer winter
1.500 1.500
30 30
14 no limit
no limit no limit
30 30
200 200
6-9 6-9
Toxicity Testing Req.: Chronic quarterly at
MONITORING
Location:just above
Location:SR 1815
, Cond., Fecal Coliform
COMMENTS
Upstream (Y/N) : Y
Downstream (Y/N): Y
PARAMETERS: DO, Temp.
Facility proposes to
receive more lenient
Ali!. 6 1990
area: 33.500 sq mi
7Q10: 5.93 cfs
7Q10: 10.87 cfs
flow: 40.50 cfs
30Q2: cfs
METALS-WQ Limits
-daily maxima -
Cadmium
Chromium
Nickel
Lead
Cyanide
Mercury
28%
(ug/1)
7.00
178
312
89
18
0.043
AU U 'r 1990
discharge
relocate from Heatherly Creek to Tom's Creek to
toxicity limits. Have failed all toxicity tests
1989 and 1990. (Note: at current site ammonia and chlorine toxicity likely
in addition to metals) Facility will receive letter addressing chlorine
toxicity. Monitor effluent for Copper, Zinc, and Silver.
7-11 glum an,t 00.11- fto oYhona lv 404 ply- i. oikiny oc ce-n% , 4u(LJO, a /1-01.1 r 41.,.;f w *."1 L !
Recommended by:
Reviewed by
Instream Assessment:
Regional Supervisor:
Permits & Engineering:
1
RETURN TO TECHNICAL SUPPORT BY:
.i s or) (,d Ai 43 fax. vt
J U L 31 1990
Date:
Date:
Date: /
Date: r7/(C
J
in
7OX 7— 7 GeJ/L L rN1/67

8/89
Facility Name A/0t {'1'[ouuthz /th2ZP Permit# /Vet20,26,6��
CHRONIC TOXICITY TESTING REQUIREMENT (QRTRLY)
The effluent discharge shall at no time exhibit chronic toxicity in any two consecutive toxicity tests,
using test procedures outlined in:
1.) The North Carolina Ceriodaphnia chronic effluent bioassay procedure (North Carolina Chronic
Bioassay Procedure - Revised *June 1988) or subsequent versions.
The effluent concentration at which there may be no observable inhibition of reproduction or
significant mortality is on % (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
issuance of this permit during the months of \SA1J, A-P e ,L, f)C;i' 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
P.O. Box 27687
Raleigh, N.C. 27611
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 receivint 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 `J^- R3 cfs
Permited Flow /. 5— MGD
IWC% a?8
Basin & Sub -basin 7-0 3
Receiving Stream lo.ns
County Ji. rrfr
Recommended by:
Dateif,44444---
Wie)
**Chronic Toxicity (Ceriodaphnia) P/F ata?F%,,l�IV Le, Jtce ocz-See Part 3 , Condition . .

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01/01/80 ver3.1 TOXICS REVIEW
Facility: PILOT MOUNTAIN WWTP
NPDES Permit No.: NC0026646
Status (E, P, or M) : P
Permitted Flow: 1.5 mgd
Actual Average Flow: 0.8 mgd
Subbasin: '030703
Receiving Stream: TOM'S CREEK 1 PRETREATMENT DATA I----EFLLUENT DATA ----
Stream Classification: C 1 ACTUAL PERMITTEDI
7Q10: 5.9 cfs I Ind. + Ind. + 1 FREQUENCY
IWC: 28.16 % 1 Domestic PERMITTED Domestic 1 OBSERVED of Chronic
Stn'd / Bkg 1 Removal Domestic Act.Ind. Total Industrial Total 1 Eflluent Criteria
Pollutant AL Conc. 1 Eff. Load Load Load Load Load 1 Conc. Violations
(ug/1) (ug/1) 1 % (#/d) (#/d) (4/d) (#/d) (#/d) 1 (ug/1) (#vio/#sam)
Cadmium S 2.0
Chromium S 50.0
Copper AL 7.0
Nickel S 88.0
Lead S 25.0
Zinc AL 50.0
Cyanide S 5.0
Mercury S 0.012
Silver AL 0.06
Selenium S 5.00
Arsenic S 50.00
Phenols S NA
NH3-N C
T.R.Chlor.AL 17.0
Pollutant
Cadmium S
Chromium S
Copper AL
Nickel S
Lead S
Zinc AL
Cyanide S
Mercury S
Silver AL
Selenium S
Arsenic S
Phenols S
NH3-N C
T.R.Chlor.AL
Effluent Effluent Effluent
Conc. using using
Allowable CHRONIC ACTUAL PERMIT
Load Criteria Influent Influent
(#/d) (ug/l) (ug/1) (ug/1)
0.96 7.101 0.535 1.810
7.97 177.527 11.583 51.724
1.49 24.854 17.432 33.775
4.95 312.447 27.404 47.984
5.03 88.763 14.769 13.861
8.31 177.527 59.717 50.924
0.47 17.753 4.114 4.767
0.00 0.043 0.247 0.002
0.04 0.213 0.554 1.070
0.19 17.753 0.000 0.000
1.91 177.527 0.000 0.000
0:000 0.000 0.000
0.000
60.359
92% 0.002 0.040 0.042 0.140 0.142 1
76% 0.003 0.300 0.303 1.350 1.353 1
82% 0.028 0.580 0.608 1.150 1.178 1 4.7
32% 0.003 0.250 0.253 0.440 0.443 1
81% 0.008 0.480 0.488 0.450 0.458 1
77% 0.020 1.610 1.630 1.370 1.390 1 2.0
59% 0.003 0.060 0.063 0.070 0.073 1
86% 0.000 0.011 0.011 0.000 0.000 1
94% 0.002 0.056 0.058 0.110 0.112 1
0%
0%
0%
0%
0% 1 1,000.0
I
N
P
U
T
S
E
c
T
I
0
N
ALLOWABLE PRDCT'D PRDCT'D PRDCT'D MONITOR/LIMIT I--ADTN'L RECMMDTN'S--
Instream 1 Recomm'd
Conc. Based on Based on Based on 1 FREQUENCY INSTREAM
using ACTUAL PERMITTED OBSERVED 1 Eff. Mon. Monitor.
OBSERVED Influent Influent Effluent 1 based on Recomm'd ?
(ug/1) Loading Loading Data 1 OBSERVED (YES/NO)
0.000 Monitor Limit
0.000 Monitor Limit
1.335 Monitor Monitor Monitor 1 Monthly NO
0.000 Monitor Limit
0.000 Limit Limit
0.566 Monitor Monitor Monitor 1 Monthly NO
0.000 Limit Limit
0.000 Limit Monitor
0.000 Monitor Monitor
0.000
0.000
0.000
0.000
281.647 Limit 1 NCAC YES
A
N
A
L
Y
S
I
S
R
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S
U
L
T
5

State of North Carolina
Department of Environment, Health, and Natural Resources
. Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Govemor George T. Everett, PhD.
William W. Cobey, Jr., Secretary July 3, 1990
Director
Billy T. Pell
Pilot Mountain WWTP
126 West Main Street
Pilot Mountain, NC 27041
Subject:. Chlorine Toxicity
NPDES Permit No. NC0026646
Surry County
Dear Mr. Pell:
Chlorine, a widely used wastewater disinfectant for the
treatment of coliform organisms, often remains instream in residual
amounts that may prove to be toxic under critical low stream flow
conditions. In the last decade, EPA assessed the potential adverse
effects of chlorine to the aquatic environment and has taken steps to
reduce the impacts through the development of federal criteria. In
1986, EPA recommended that all states have a chlorine standard by
their next triennial review of water quality standards.
In revising its water quality standards in 1989, North Carolina
developed an action level for chlorine of 17 ug/1 (freshwater classes
only). In addition, the fecal coliform limit was reduced from 1000
colonies/100 ml to 200 colonies/ 100 ml. Under a new DEM procedure,
dechlorination and chlorine limits are now recommended for all new or
expanding dischargers proposing the use of chlorine for effluent
disinfection. The Division is reviewing chlorine levels from all
existing dischargers as part of their NPDES permit renewal process.
Our records indicate that chlorine from your facility's effluent
discharge is considered toxieto the receiving stream under low flow
conditions, i.e., the amount of chlorine discharged causes a
violation of the instream action 'ravel for chlorine (17 ug/1) under
7Q10 conditions (the lowest aver..: a daily flow for seven (7)
consecutive days during a ten (10) year period). Action should be
taken to reduce the effluent concentration of chlorine to an
acceptable level. Based on your facility's instream waste
concentration of 28%, an acceptable level of chlorine in your
effluent is 61 ug/1 or 0.061 mg/l. If this level is not feasible,
you should consider dechlorination or alternate methods of
disinfection for your facility to ensure that both chlorine and
bacterial limits are met. In addition, if your facility plans to
undertake any phase of construction, dechlorination or alternate
disinfection should be included. However, please note that an
authorization to construct must be obtained from this Division prior
to any alteration to your treatment plant.
Pollution Prevention Pays
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]

-2 -
The Division is currently reviewing its water quality
regulations pertaining to chlorine. In the future, effluent limits
and/or dechlorination may be required of existing facility's with
chlorine problems. If the chlorine levels in your facility's
effluent remain unchanged, a chlorine limit or a whole effluent
toxicity testing requirement may be added to your permit limitations.
Please feel free to call Steve Mauney of the Division's Regional
Office at [phone], if you have any questions or comments
regarding this issue.
Sinerely,
Steve Tedder
Water Quality Section Chief
SWT/eaj
cc: Winston-Salem Regional Office
Central Files

DIVISION OF ENVIRONMENTAL, MANAGEMENT
May 14, 1990
MEMORANDUM
To: Trevor Clements
From: Nile Testerman
Subject: Pretreatment Information Request Form (PIRF)
Town of Pilot Mountain WWTP
NC0026646
Attached is an updated PIRF based on Town of Pilot Mountain's
latest headworks analysis received by the Division on March 21,
1990. If you have any questions, please call me at extension
525 or come by my office.

NPDFS PRETREATMENT INFORMATION REQUEST FORM
FACILITY NAME: T a if.) h Of Pi.
4.)-t 4/)L NPDF.S NO. NCO 0 6 to
RDQUESTER: Mfdt/-r7' /4,/rkr DATE: y/gREGION: li(J - S
PERMIT CONDITIONS COVERING PRFTRFATT FNT
This facility has no SIUs and should not have pretreatment language.
This facility should and/or is developing a pretreatment program.
Please include the following conditions:
Program Development
Phase I due / /
Phase II due / /
Additional Conditions
(attached)
This facility is currently implementing a pretreatment program.
Please include the following conditions:
P< Program Implementation
Additional Conditions
(attached)
ICNIFICANT INDUSTRIAL USERS' (SIUs) CONTRIBUTIONS
S IU FLOW - TOTAL :
CCMPOSITIOJ
TEXTILF :
METAL FINISHING:
OTHER:
(9,03 ram„
O y'- MGD
MGD
HEADKAICS REVIEW
PARAMETER ip--A-s-s-rtiaot44 tf DAILY LOAD IN LBS/DAY I
I MUMBLE DC ESl'IC P A rtitcr % RIM 0II
L.
Cd 0, / l 0, 0 0 V- 0 , /V 0► Oil
Cr /, 3 - 0, 003 /. "3<. 0.30
Cu 19,ocp8' /,LT' o.s 82
Ni e;',VF (.003 o.e/V o,b� "32
Pb 0,99 O,vog n,vs- 0.tie ? 1
Zn 0 , 0 0 /, 3 7- /, b / ..-
CN o,09 0,003 0.07 0..06 s'i
Phenol _ � _
Other 0, 0 004 6 , o o Doe
o,O02
oe
o. 0// �.
•sl `1 L.
RECEIVED: / / REVIEWED BY: %' �� �'<. "l,= �, .,_.:. RETAINED: i

01/01/80 ver 3.1 TOXICS REVIEW
Facility: PILOT MOUNTAIN WWTP
NPDES Permit No.: NC0026646
Status (E, P, or M) : P
Permitted Flow: 1.5 mgd
Actual Average Flow: 0.8 mgd
Subbasin: '030703
Receiving Stream: TOM'S CREEK I PRETREATMENT DATA I----EFLLUENT DATA ----
Stream Classification: C I ACTUAL PERMITTEDI
7Q10: 5.9 cfs I Ind. + Ind. + 1 FREQUENCY
IWC: 28.16 % I Domestic PERMITTED Domestic 1 OBSERVED of Chronic
Stn'd / Bkg 1 Removal Domestic Act.Ind. Total Industrial Total 1 Eflluent Criteria
Pollutant AL Conc. 1 Eff. Load Load Load Load Load 1 Conc. Violations
(ug/1) (ug/1) 1 % (#/d) (#/d) (#/d) (#/d) (#/d) 1 (ug/1) (#vio/#sam)
Cadmium S 2.0 I 92% 0.00 0.039 0.039 1.380 1.380
Chromium S 50.0 1 76% 0.00 0.292 0.292 1.350 1.350
Copper AL 7.0 1 82% 0.03 0.735 0.765 1.160 1.190
Nickel S 88.0 I 32% 0.01 0.246 0.256 0.438 0.448
Lead S 25.0 1 81% 0.01 0.422 0.432 0.454 0.464
Zinc AL 50.0 1 77% 0.02 1.161 1.181 1.370 1.390
Cyanide S 5.0 1 59% 0.00 0.063 0.063 0.069 0.069
Mercury S 0.012 1 86% 0.08 0.012 0.092 0.000 0.080
Silver AL 0.06 1 94% 0.00 0.058 0.058 0.109 0.109
Selenium S 5.00 1 0%
Arsenic S 50.00 1 0%
Phenols S NA 1 0%
NH3-N C 1 0%
T.R.Chlor.AL 17.0 1 0%
Pollutant
4.7
2.0
1,000.0
i
N
P
U
T
S
E
C
T
I
0
N
ALLOWABLE PRDCT'D PRDCT'D PRDCT'D MONITOR/LIMIT I--ADTN'L RECMMDTN'S--
Effluent Effluent Effluent Instream 1 Recomm'd
Conc. using using Conc. Based on Based on Based on 1 FREQUENCY INSTREAM
Allowable CHRONIC ACTUAL PERMIT using ACTUAL PERMITTED OBSERVED I Eff. Mon. Monitor.
Load Criteria Influent Influent OBSERVED Influent Influent Effluent 1 based on Recomm'd ?
(#/d) (ug/1) (ug/1) (ug/1) (ug/1) Loading Loading Data 1 OBSERVED (YES/NO)
Cadmium S I 0.96 7.101 0.50 17.585 0.000 Monitor Limit' I 1 A
Chromium S I 7.97 177.527 11.16 51.609 0.000 Monitor Limit 1 I N
Copper AL 1 1.49 24.854 21.93 34.119 1.335 Monitor Monitor Monitor I Monthly NO I A
Nickel S 1 4.95 312.447 27.73 48.525 0.000 Monitor Limit 1 I L
Lead S 1 5.03 88.763 13.07 14.043 0.000 Limit Limit 1 1 Y
Zinc AL I 8.31 177.527 43.27 50.924 0.566 Monitor Monitor Monitor I Monthly NO I S
Cyanide S 1 0.47 17.753 4.11 4.506 0.000 Limit Limit 1 1 I
Mercury S ) 0.00 0.043 2.05 1.784 0.000 Limit Limit 1 1 S
Silver AL I 0.04 0.213 0.55 1.042 0.000 Monitor Monitor 1 I
Selenium S 1 0.19 17.753 0.00 0.000 0.000 1 I R
Arsenic S 1 1.91 177.527 0.00 0.000 0.000 1 1 E
Phenols S 1 0.000 0.00 0.000 0.000 1 1 S
NH3-N C 1 0.000 0.000 1 1 U
T.R.Chlor.AL 1 60.359 281.647 Limit 1 NCAC YES 1 L
I I I T
I I I S

SUMMER
Discharger
Receiving Stream
MODEL RESULTS
: PILOT MOUNTAIN WWTP
: TOM'S CREEK
The End D.O. is 7.48 mg/l.
The End CBOD is 13.46 mg/l.
The End NBOD is 3.15 mg/l.
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flow
(mg/1) Milepoint Reach # (mg/1) (mg/1) (mg/1) (mgd)
Segment 1 5.34 0.00 1
Reach 1 60.00 13.50 0.00 1.50000
wi d.Xi Stine/ (8' O 3D . 10{,-
r
CI30.0 ( 3 .
N$o= I2.19 ».311
ho sG) `• ?q „ y/ r Tv 0

*** MODEL SUMMARY DATA ***
Discharger : PILOT MOUNTAIN WWTP Subbasin : 030703
Receiving Stream : TOM'S CREEK Stream Class: C
Summer 7Q10 : S, 7!3 Winter 7Q10 : Ao. ?7
Design Temperature: 25.0
'LENGTH' SLOPE' VELOCITY 1 DEPTH' Kd I Kd I Ka I Ka I KN
I mile I ft/mil fps 1 ft Idesignl @20' 'design' @201, 'design'
I I I I I I I I I I
Segment 1 1 3.601 11.831 0.343 1 1.30 1 0.34 10.27 18.15 I 7.311 0.44 I
Reach 1 I I I I I I I I I I
1 Flow 1 CBOD 1 NBOD 1 D.O. I
1 cfs 1 mg/1 1 mg/1 1 mg/1 I
Segment 1 Reach 1
Waste 1 2.325 1 60.000 1 13.500 1 0.000
Headwaters i 5.930 1 2.000 1 1.000 1 7.440
Tributary 1 0.000 1 2.000 1 1.000 1 7.440
* Runoff 1 0.260 1 2.000 1 1.000 1 7.440
* Runoff flow is in cfs/mile

SUMMER
..I Seg # I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I
1 1 0.00 5.34 18.34 4.52 8.25
1 1 0.20 5.84 18.02 4.43 8.31
1 1 0.40 6.21 17.70 4.34 8.36
1 1 0.60 6.49 17.40 4.25 8.41
1 1 0.80 6.71 17.10 4.16 8.46
1 1 1.00 6.87 16.80 4.08 8.51
1 1 1.20 7.00 16.52 4.00 8.57
1 1 1.40 7.09 16.23 3.92 8.62
1 1 1.60 7.17 15.96 3.84 8.67
1 1 1.80 7.23 15.68 3.76 8.72
1 1 2.00 7.28 15.42 3.69 8.77
1 1 2.20 7.32 15.16 3.62 8.83
1 1 2.40 7.35 14.90 3.55 8.88
1 1 2.60 7.38 14.65 3.48 8.93
1 1 2.80 7.41 14.40 3.41 8.98
1 1 3.00 7.43 14.16 3.34 9.03
1 1 3.20 7.45 13.92 3.28 9.09
1 1 3.40 7.46 13.69 3.21 9.14
1 1 3.60 7.48 13.46 3.15 9.19
I Seg # I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I

SUMMER
MT AIRY + PILOT MOUNTAIN
MODEL RESULTS
Discharger : CITY OF MOUNT AIRY
Receiving Stream : ARARAT RIVER
The End D.O. is 6.52 mg/l. (C-ws)
The End CBOD is 7.61 mg/1.
The End NBOD is 5.19 mg/1. (6.t3)
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flow
(mg/1) Milepoint Reach # (mg/1) (mg/1) (mg/1) (mgd)
Segment 1 5.01 0.26 1
Reach 1
Reach 2
Reach 3
Reach 4
Reach 5
Reach 6
Reach 7
Reach 8
Segment 2 5.34 0.00 1
Reach 1
Segment 3 6.26 0.00 1
Reach 1 (.(2.701
w/o Mcri- ►�o�� �
60.00
0.00
0.00
0.00
45.00
0.00
0.00
0.00
58.50
0.00
0.00
0.00
90.00
0.00
0.00
0.00
5.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
7.00000
0.00000
0.00000
0.00000
0.01800
0.00000
0.00000
0.00000
R./ A- 04+0
60.00 13.50 0.00 1.50000
0.00 0.00 0.00 0.00000
/' rz4 •J 6 ' 6. 5-6 V415 I C C i01 ) - 4,5 z --!. ( ( N BO D
1-_ /-{- i rc t d D H.t&(nnAc S as c r m c ii o-C. CCUecc,C i L;-0
w/o F. A, i Ll SeG 1 , DO . , = . 55-
5A\Ic 7
\01-4)K1 rJ
0 3 Y 1 TT•v O 110 dock a 7
tiu ►4-
`fI

*** MODEL SUMMARY DATA ***
..Discharger : CITY OF MOUNT AIRY Subbasin : 030703
Receiving Stream : ARARAT RIVER Stream Class: C
Summer 7Q10 : 14.9 Winter 7Q10 : 31.0
Design Temperature: 25.0
ILENGTHI SLOPE! VELOCITY 1 DEPTH' Kd 1 Kd I Ka 1 Ka 1 KN 1
I mile 1 ft/mil fps I ft Idesign l @201/2 Idesignl @204 Idesignl
1 1 1 1 I 1 1 1 I
Segment 1 1 0.261 8.201 0.540 1 1.78 1 0.33 1 0.26 14.44 I 3.981 0.44
Reach 1 1 I 1 I I 1 I I I
1 1 1 1 1 I 1 1 I
Segment 1 1 0.721 8.201 0.589 1 1.98 1 0.33 1 0.26 13.95 1 3.551 0.44
Reach 2 I 1 1 1 1 1 I 1 I
I 1 1 1 1 1 1 1 I
Segment 1 1 1.201 8.201 0.720 12.33 1 0.33 1 0.26 13.43 1 3.081 0.44
Reach 3 1 1 1 I I I 1 1 I
1 I 1 I 1 I I 1 I
Segment 1 1 2.201 8.201 0.723 1 2.36 1 0.33 10.26 13.38 1 3.031 0.44
Reach 4 1 1 1 1 1 I 1 1 I
1 I 1 I I I 1 1 I
Segment 1 1 1.651 8.201 0.732 1 2.36 1 0.33 10.26 13.38 I 3.031 0.44
Reach 5 1 I 1 I I 1 1 1 I
I I I I I I I 1 I
Segment 1 1 2.101 10.501 0.790 12.30 10.35 1 0.28 13.67 1 3.291 0.44
Reach 6 I I 1 I 1 I I 1 I
Segment 1
Reach 7
1 1 I I I 1 1 I
2.00I 10.501 0.803 12.33 1 0.35 10.28 1 3.62 I 3.251 0.44
1 I 1 1 1 1 1 I
I 1 I 1 I I 1 I I
Segment 1 1 2.501 6.501 0.723 1 2.53 10.32 1 0.25 14.61 1 4.141 0.44
Reach 8
1 I 1 1 1 I I 1 I
Segment 2 I 3.601 11.831 0.343 11.30 10.34 1 0.27 1 8.15 I 7.311 0.44
Reach 1 I 1 1 I I 1 I I I
I I 1 1 I 1 I I I
Segment 3 1 2.301 6.50I 0.774 1 2.67 10.32 1 0.25 1 4.93 1 4.43I 0.44
Reach 1 1 1 I I 1 I 1 1 I
1 Flow 1 CBOD 1 NBOD 1 D.O. 1
1 cfs I mg/1 I mg/1 I mg/1 I
Segment 1 Reach 1

Waste 1 10.850 160.000 158.500 I 5.000
Headwaters) 14.900 ) 2.000 ) 1.000 1 5.550
Tributary 1 0.000 1 2.000 I 1.000 I 7.440
* Runoff 1 0.080 1 2.000 1 1.000 1 7.440
Segment 1 Reach 2
Waste I 0.000 1 0.000 I 0.000 I 0.000
Tributary I 8.900 1 2.000 I 1.000 I 7.440
* Runoff 1 0.080 1 2.000 1 1.000 1 7.440
Segment 1 Reach 3
Waste I 0.000 I 0.000 1 0.000 I 0.000
Tributary 1 23.600 I 2.000 1 1.000 1 7.440
* Runoff 1 0.380 1 2.000 1 1.000 1 7.440
Segment 1 Reach 4
Waste I 0.000 I 0.000 1 0.000 I 0.000
Tributary 1 0.800 I 2.000 1 1.000 I 7.440
* Runoff 1 0.580 1 2.000 1 1.000 1 7.440
Segment 1 Reach 5
Waste 1 0.028 145.000 1 90.000 1 0.000
Tributary 1 0.000 1 2.000 1 1.000 1 7.440
* Runoff 1 0.580 1 2.000 1 1.000 1 7.440
Segment 1 Reach 6
Waste 1 0.000 I 0.000 I 0.000 1 0.000
Tributary ) 0.380 I 2.000 I 1.000 1 7.440
* Runoff 1 0.380 1 2.000 1 1.000 1 7.440
Segment 1 Reach 7
Waste 1 0.000 ) 0.000 I 0.000 1 0.000
Tributary 1 0.770 ) 2.000 I 1.000 1 7.440
* Runoff 1 1.700 1 2.000 1 1.000 1 7.440
Segment 1 Reach 8
Waste 1 0.000 1 0.000 I 0.000 1 0.000
Tributary 1 0.000 I 2.000 I 1.000 1 0.000
* Runoff 1 1.700 1 2.000 1 1.000 1 7.440
Segment 2 Reach 1
Waste I 2.325 160.000 1 13.500 I 0.000
Headwaters) 5.930 I 2.000 1 1.000 I 7.440
Tributary 1 0.000 1 2.000 1 1.000 1 0.000
* Runoff 1 0.260 1 2.000 1 1.000 1 7.440
Segment 3 Reach 1
Waste 1 0.000 1 0.000 I 0.000 I 0.000
Headwaters) 0.000 1 2.000 1 1.000 1 0.000
Tributary 1 0.000 1 2.000 1 1.000 1 0.000
* Runoff 1 1.700 1 2.000 1 1.000 1 7.440

A'
* Runoff flow is in cfs/mile

SUMMER
MT AIRY + PILOT MOUNTAIN
I Seg
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
# I Reach # I Seg Mi I D.O.
1 0.00 5.32
1 0.02 5.29
1 0.04 5.27
1 0.06 5.24
1 0.08 5.22
1 0.10 5.19
1 0.12 5.17
1 0.14 5.15
1 0.16 5.12
1 0.18 5.10
1 0.20 5.08
1 0.22 5.06
1 0.24 5.03
1 0.26 (5.01
2 0.26 5.64
2 0.30 5.60
2 0.34 5.57
2 0.38 5.53
2 0.42 5.50
2 0.46 5.47
2 0.50 5.44
2 0.54 5.41
2 0.58 5.37
2 0.62 5.35
2 0.66 5.32
2 0.70 5.29
2 0.74 5.26
2 0.78 5.23
2 0.82 5.20
2 0.86 5.18
2 0.90 5.15
2 0.94 5.13
2 0.98 5.10
3 0.98 6.05
3 1.18 5.97
3 1.38 5.90
3 1.58 5.83
3 1.78 5.77
3 1.98 5.71
3 2.18 5.66
4 2.18 5.68
4 2.38 5.63
4 2.58 5.59
4 2.78 5.54
4 2.98 5.51
4 3.18 5.47
4 3.38 5.44
4 3.58 5.41
4 3.78 5.39
4 3.98 5.36
4 4.18 5.34
4 4.38 5.32
5 4.38 5.32
5 4.43 5.32
5 4.48 5.31
5 4.53 5.31
I CBOD
26.44
26.42
26.40
26.38
26.35
26.33
26.31
26.29
26.27
26.25
26.23
26.21
26.19
26.16
19.96
19.93
19.90
19.88
19.85
19.82
19.79
19.76
19.73
19.70
19.68
19.65
19.62
19.59
19.56
19.53
19.51
19.48
19.45
12.39
12.31
12.22
12.14
12.06
11.98
11.90
11.77
11.68
11.60
11.52
11.43
11.35
11.27
11.19
11.11
11.03
10.95
10.88
10.89
10.87
10.85
10.83
I NBOD
25.23
25.20
25.17
25.15
25.12
25.10
25.07
25.04
25.02
24.99
24.96
24.94
24.91
24.88
18.75
18.72
18.68
18.65
18.61
18.57
18.54
18.50
18.47
18.43
18.40
18.36
18.33
18.29
18.26
18.22
18.19
18.15
18.12
11.19
11.09
11.00
10.90
10.81
10.72
10.62
10.50
10.40
10.30
10.21
10.12
10.02
9.93
9.84
9.75
9.66
9.57
9.49
9.52
9.50
9.48
9.46
I Flow I
25.75
25.75
25.75
25.75
25.76
25.76
25.76
25.76
25.76
25.76
25.77
25.77
25.77
25.77
34.67
34.67
34.68
34.68
34.68
34.69
34.69
34.69
34.70
34.70
34.70
34.71
34.71
34.71
34.72
34.72
34.72
34.73
34.73
58.33
58.40
58.48
58.56
58.63
58.71
58.78
59.58
59.70
59.82
59.93
60.05
60.16
60.28
60.40
60.51
60.63
60.74
60.86
60.89
60.92
60.95
60.98

1 5 4.58 5.30 10.81 9.44 61.00
1 5 4.63 5.30 10.80 9.42 61.03
1 5 4.68 5.30 10.78 9.39 61.06
1 5 4.73 5.29 10.76 9.37 61.09
1 5 4.78 5.29 10.74 9.35 61.12
1 5 4.83 5.29 10.72 9.33 61.15
1 5 4.88 5.28 10.70 9.31 61.18
1 5 4.93 5.28 10.68 9.29 61.21
1 5 4.98 5.28 10.66 9.27 61.24
1 5 5.03 5.27 10.64 9.25 61.27
1 5 5.08 5.27 10.63 9.23 61.29
1 5 5.13 5.27 10.61 9.20 61.32
1 5 5.18 5.27 10.59 9.18 61.35
1 5 5.23 5.26 10.57 9.16 61.38
1 5 5.28 5.26 10.55 9.14 61.41
1 5 5.33 5.26 10.53 9.12 61.44
1 5 5.38 5.26 10.51 9.10 61.47
1 5 5.43 5.25 10.49 9.08 61.50
1 5 5.48 5.25 10.48 9.06 61.53
1 5 5.53 5.25 10.46 9.04 61.56
1 5 5.58 5.25 10.44 9.02 61.58
1 5 5.63 5.25 10.42 9.00 61.61
1 5 5.68 5.25 10.40 8.98 61.64
1 5 5.73 5.24 10.38 8.96 61.67
1 5 5.78 5.24 10.37 8.94 61.70
1 5 5.83 5.24 10.35 8.92 61.73
1 5 5.88 5.24 10.33 8.90 61.76
1 5 5.93 5.24 10.31 8.88 61.79
1 5 5.98 5.24 10.29 8.86 61.82
1 5 6.03 5.24 10.28 8.84 61.85
1 6 6.03 5.25 10.22 8.79 62.23
1 6 6.13 5.25 10.19 8.76 62.26
1 6 6.23 5.25 10.16 8.72 62.30
1 6 6.33 5.26 10.13 8.69 62.34
1 6 6.43 5.26 10.09 8.65 62.38
1 6 6.53 5.26 10.06 8.62 62.42
1 6 6.63 5.26 10.03 8.58 62.45
1 6 6.73 5.26 10.00 8.55 62.49
1 6 6.83 5.27 9.96 8.52 62.53
1 6 6.93 5.27 9.93 8.48 62.57
1 6 7.03 5.27 9.90 8.45 62.61
1 6 7.13 5.28 9.87 8.42 62.64
1 6 7.23 5.28 9.84 8.38 62.68
1 6 7.33 5.28 9.81 8.35 62.72
1 6 7.43 5.29 9.77 8.32 62.76
1 6 7.53 5.29 9.74 8.28 62.80
1 6 7.63 5.29 9.71 8.25 62.83
1 6 7.73 5.30 9.68 8.22 62.87
1 6 7.83 5.30 9.65 8.19 62.91
1 6 7.93 5.30 9.62 8.16 62.95
1 6 8.03 5.31 9.59 8.12 62.99
1 6 8.13 5.31 9.56 8.09 63.02
1 7 8.13 5.34 9.46 8.01 63.79
1 7 8.23 5.34 9.42 7.96 63.96
1 7 8.33 5.35 9.37 7.92 64.13
1 7 8.43 5.36 9.33 7.87 64.30
1 7 8.53 5.37 9.29 7.83 64.47
1 7 8.63 5.37 9.24 7.78 64.64
1 7 8.73 5.38 9.20 7.74 64.81
1 7 8.83 5.39 9.15 7.69 64.98

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
3
Seg # 1
7
7
7
7
7
7
7
7
7
7
7
7
7
8
8
8
8
8
8
8
8
8
8
8
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Reach #
8.93
9.03
9.13
9.23
9.33
9.43
9.53
9.63
9.73
9.83
9.93
10.03
10.13
10.13
10.38
10.63
10.88
11.13
11.38
11.63
11.88
12.13
12.38
12,63
0.00
0.30
0.60
0.90
1.20
1.50
1.80
2.10
2.40
2.70
3.00
3.30
3.60
0.00
0.23
0.46
0.69
0.92
1.15
1.38
1.61
1.84
2.07
2.30
I Seg Mi I
5.40
5.40
5.41
5.42
5.43
5.44
5.44
5.45
5.46
5.47
5.47
5.48
5.49
5.49
5.58
5.66
5.73
5.80
5.86
5.92
5.97
6.02
6.06
6.11
5.34
6.04
6.49
6.80
7.00
7.13
7.23
7.30
7.35
7.39
7.43
7.46
7.48
6.26
6.30
6.33
6.36
6.39
6.41
6.44
6.46
6.48
6.50
6.52
D.O.
9.11
9.07
9.03
8.98
8.94
8.90
8.86
8.82
8.78
8.73
8.69
8.65
8.61
8.61
8.51
8.42
8.32
8.23
8.14
8.04
7.95
7.87
7.78
7.69
18.34
17.86
17.40
16.95
16.52
16.09
15.68
15.29
14.90
14.52
14.16
13.81
13.46
8.35
8.27
8.20
8.12
8.04
7.97
7.90
7.82
7.75
7.68
7.61
I CBOD
7.65
7.61
7.57
7.52
7.48
7.44
7.40
7.36
7.32
7.28
7.24
7.20
7.16
7.16
7.05
6.95
6.85
6.75
6.65
6.56
6.46
6.37
6.28
6.19
4.52
4.38
4.25
4.12
4.00
3.88
3.76
3.65
3.54
3.44
3.34
3.24
3.15
5.84
5.77
5.70
5.64
5.57
5.50
5.44
5.37
5.31
5.25
5.19
I NBOD
65.15
65.32
65.49
65.66
65.83
66.00
66.17
66.34
66.51
66.68
66.85
67.02
67.19
67.19
67.62
68.04
68.47
68.89
69.32
69.74
70.17
70.59
71.02
71.44
8.25
8.33
8.41
8.49
8.57
8.64
8.72
8.80
8.88
8.96
9.03
9.11
9.19
80.63
81.03
81.42
81.81
82.20
82.59
82.98
83.37
83.76
84.15
84.54
I Flow I