NC0026689_Wasteload Allocation_19940517

NPDES DOCUHENT SCANNING COVER SHEET
Permit:
NC0026689
Denton WWTP
NPDES
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Correspondence
Instream Assessment
(67b)
Environmental
Assessment (EA)
Permit
History
Document Date:
May 17, 1994
This documeat iia printed on reuse paper - ignore arty
coateat oa the reverse aside

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0026689
PERMI'1"1'EE NAME:
FACILITY NAME:
Town of Denton
Town of Denton WWTP
Facility Status: Existing
Permit Status: Renewal
Major Minor
Pipe No.: 001
Design Capacity: 0.300 MGD
Domestic (% of Flow): 85 % (c .
Industrial (% of Flow): 15 %
Comments:
pretreatment (riliP 143y0A;ram 31\�(`l1-
RECEIVING STREAM: UT Lick Creek
Class: C
Sub -Basin: 03-07-08
Reference USGS Quad: E 18 SW
County: Davidson
Regional Office: Winston-Salem Regional Office
(please attach)
Previous Exp. Date: 8/31/94 Treatment Plant Class:
Classification changes within three miles:
Requested by:
Prepared by:
Susan Wilson
p. !,21
1At frl,
YV1
Date: 3/17/94
Date: _7/3/9%
" 1
Reviewed by:._C t. �.Qjr CtL 1c�,g > 7 f Date: S/13/(1
�(w)10(9.5
wake, ---
Modeler
Date Rec.
#
AW 44)
3/i t/y yt
7: ° y
2
Drainage Area (mi ) 0.5 7 Avg. Streamflow (cfs): 6.5
7Q10 (cfs) Winter 7Q10 (cfs) b 30Q2 (cfs)
Toxicity Limits: IWC / 0 O %
Instream Monitoring:
Parameters DO)Temp,
Upstream
Downstream
yZu1.21.-• I` uuauw.
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/I):
DO (mg/1):
TSS (mg/I): 30 30 weekly*
Fecal Col. (/100 ml): 200 200 weekly*
pH (SU): 6-9 6-9
Residual Chlorine (i.tg/1): monitor monitor
Oil & Grease (mg/1): monitor monitor
TP (mg/1): monitor monitor
TN (mg/1): monitor monitor
R Effluent monitoring for Chromium, Copper, Zinc, T. Nitrogen and T. Phosphorus
Acute hronic Jp/F e 90
/ motl, {4vj, Nov, Feb
eopid /Prod Polif01,rt�t
Location rt do .Ff ahc. w of/vend
Location D.601,7e3 in of el/venZ�
SR a5a5
Monitor Fequency
Cadmium (ug/1):
Chromium (ug/1):
Copper (ug/1):
Nickel (ug/1):
Lead (ug/1):
Zinc (ug/1):
Cyanide (ug/1):
Phenols (ug/1):
Mercury (ug/1):
Silver (ug/1):
Comrr
Monthly Average
Summer Winter
0.30 r0.30
19 24
6 13
6 6
Daily Max.
2
50
. * mor�itfv
88
25
Lei* n1brii-la,
monitor
monitor
monitor
monitor
weekly*
weekly*
WQ or EL
WQ
WQ
WQWWQ
WQ
WQ
WQ
WQW
Monitor frequency
quarterly
quarterly
quarterly
quarterly
The facility discharges into a stream with 7Q10/30Q2=0 cfs. Removal of the
discharge will be required if a more environmentally sound alternative is
available. An engineering report evaluating alternatives to discharge is due —
180 days prior to permit expiration along with the permit renewal
application. As part of the report, the cost of constructing a treatment facility
to meet limits of 5 mg/1 11OD5, 2 mg/1 NH3, 6 mg/1 dissolved oxygen, and
17 ug/1 chlorine must also be included if there are no alternatives to a surface
discharge. Upon review of the results of the engineering report, the Division —
may reopen and modify this NPDES permit to require removal of the —
discharge, modified treatment designs, and/or revised effluent limitations
within a specified time schedule.

/legional Supervisor:
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 WASTELOAD ALLOCATION
Town of Denton WWTP
NC0026689
85% Domestic and 15% Industrial
Existing
Renewal
UT to Lick Creek
C
030708
Davidson
Winston-Salem
Susan Wilson
3/17/94
E18 SW
RECEIVE;
Dept of EHNR
MAY =, 6 1294
Request # 7804 Wi titon_.Sayem
Re-abr `-' Office
Stream Characteristic:
USGS #
Date:
Drainage Area (mi2):
Summer 7Q10 (cfs):
Winter 7Q10 (cfs):
Average Flow (cfs):
30Q2 (cfs):
IWC (%):
0212252580
8/14/89
0.57
0
0
0.5
0
100
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Staff Report and standard A form never received. Town of Denton does not have a Long
Term Monitoring Plan. They have failed their toxicity test 12 times since 8/91 and only passed 6
times. Being reviewed due to I and I problems which may be cause of the facility reaching their
90% flow capacity. Data should be reviewed for daily max violations and penalities should be
given accordingly. Presently not under an SOC. Recommend existing conventional parameter
limits and limits for Cadmium, Lead, Nickel and Chromium. Also high values for zinc (max
predicted waste concentration = 1416 ug/l) and copper (max pred Cw=908.3) are reported.
Receiving stream has no flow and zero flow policy should be put into permit. We
preformed a speculative for this facility 6/11/92 for a relocation and an expansion to 0.6 and 1.0
mgd; however, the facility haaequested either. An A to C was issued on 2/27/90 for routine
maintance and upgrade only. f c 70 1 a., y0te &rare)
Special Schedule Requirements and additional comments from Reviewers:
Recommended by:
Date:4k
Reviewed by
O
Instream Assessment: LJazn-h)1001,-, Date: 573/g6r
Date: — _ —9
r / / . Cif_
Permits & Engineering:
Date:.
JUN 0 2 19
RETURN TO TECHNICAL SUPPORT BY:

2
Existing Limits:
CONVENTIONAL PARAMETERS
Monthly Average Monitor Fequency
Summer Winter
Wasteflow (MGD): 0.30 0.30
BOD5 (mg/1): 19 24 weekly*
NH3N (mg/1): 6 13 weekly*
DO (mg/1): 6 6
TSS (mg/1): 30 30 weekly*
Fecal Col. (/100 ml): 200 200 weekly*
pH (SU): 6-9 6-9
Residual Chlorine (µg/1): monitor monitor
Oil & Grease (mg/1): monitor monitor
TP (mg/1): monitor monitor
TN (mg/1): monitor monitor
Effluent monitoring for Chromium, Copper, Zinc, T. Nitrogen and T. Phosphorus
* Failed F. Col monthly average one time since 91 all other values look okay should we reduce their
monitoring frequency based on facility class??? Please comment!!!! �uunvr�+'
Cp 0-r e(cCOMMMETJP f
Monthly Average Monitor Fequency
Summer Winter
Wasteflow (MGD): 0.30 0.30
BOD5 (mg/1): 19 24
NH3N (mg/1): 6 13
DO (mg/1): 6 6
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): monitor monitor
TP (mg/1): monitor monitor
TN (mg/1): monitor monitor
Recommended Limits:
.�pc1
(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)
The facility discharges into a stream with 7Q10/30Q2=0 cfs. Removal of the
discharge will be required if a more environmentally sound alternative is
available. An engineering report evaluating alternatives to discharge is due
180 days prior to permit expiration along with the permit renewal
application. As part of the report, the cost of constructing a treatment facility
to meet limits of 5 mg/1 BOD5, 2 mg/1 NH3, 6 mg/1 dissolved oxygen, and
17 ug/1 chlorine must also be included if there are no alternatives to a surface
discharge. Upon review of the results of the engineering report, the Division
may reopen and modify this NPDES permit to require removal of the
discharge, modified treatment designs, and/or revised effluent limitations
within a specified time schedule.

Type of Toxicity Test:
Existing Limit:
Recommended Limit:
Monitoring Schedule:
Existing Limits
COD (mg/):
Cadmium (ug/1):
Chromium (ug/1):
Copper (ug/1):
Nickel (ug/1):
Lead (ug/1):
Zinc (ug/l):
Cyanide (ug/l):
Phenols (ug/1):
Mercury (ug/1):
Silver (ug/1):
Recommended Limits
Cadmium (ug/l):
Chromium (ug/1):
Copper (ug/1):
Nickel (ug/1):
Lead (ug/1):
Zinc (ug/l):
Cyanide (ug/1):
Phenols (ug/l):
TOXICS/METALS
Chronic P/F (Ceriodaphnia) limit Qrtly
90%
90%
FEB, MAY, AUG, NOV
Daily Max.
2
monitor
monitor
88
25
monitor
Daily Max. WQ or EL Monitor frequency
2 WQ
50 WQ
.7* moAkn✓ WQ
88 WQ
25 WQ
MC* rAbNit, r WQ
monitor WQ quarterly
monitor WQ quarterly
Mercury (ug/1): monitor WQ quarterly
Silver (ug/1): monitor WQ quarterly
* AL- monitoring data shows high values of these two POC and the facility failed their toxicity test 12 tirrr
from 8/91 to 2/94 and only passed 7 times.
Monitoring should be done quarterly to coincide with Chronic Toxicty Test (FEB, MAY, AUG, NOV)
Limit Changes due to toxicant analysis and DMR data. Monitoring requirements
due to no LTMP and no data on these POCs.
_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.
OR
No parameters are water quality limited, but this discharge may affect future allocations.

4
INSTREAM MONITORING REQUIREMENTS
Upstream Location: — 50 feet above discharge point.
Downstream Location: 0.5 miles downstream from effluent at SR 2505
Parameters: DO, Temperature, Conductivity, and Fecal Coliform.
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 X No
If no, which parameters cannot be met?
Would a "phasing in" of the new limits be appropriate? Yes No X
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) N (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 v.) h o }- ')eh\-p,1A \1\i WTI Permit # NGOJa (o (nf 9 Pipe # O /
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 16 % (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
, trio, / f*/ � A/ni Fh . Effluent sampling for this testing shall be performed at the NPDES
permitted filial eent 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 0 cfs
Permitted Flow 0.30 MGD Recommended by:
IWC (DO ?o %
Basin & Sub -basin 030708'
Receiving Stream Ut to Li(/ (re(k
County Da.Vi (Ron
Date
QCL PIF Version 9/91

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TOXICANT ANALYSIS
,1F
Facility Name
Town of Denton WWTP
NPDES #
NC0026689
Qw (MGD)
0.3
7Q1Os (cfs)
_.._.._.._.._.
0
100.00
IWC (%)
Rec'ving Stream
UT Lick Creek
Stream Class
C Fair
FINAL RESULTS
Cadmium
Max. Pred Cw
54.6
Allowable Cw
2.0
Nickel
Max. Pred Cw
192.1
Allowable Cw
88.0
Lead
Max. Pred Cw
82.5
Allowable Cw
25.0
Copper AL
Max. Pred Cw
908.3
Allowable Cw
7.0
Zinc AL
Max. Pred Cw
1416
Allowable Cw
50.0
Chromium
Max. Pred Cw
52
Allowable Cw
50.0
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
0
Max. Pred Cw
0
Allowable Cw
0.0
0
Max. Pred Cw
0
Allowable Cw
0.0
rllvni r,r
6 914-
w os f- v,� u PS 450
i j VatLeS 9Veater fah
4 less tiActfl va(uPs t(dek-ccf)a,)
1(t2X— L►icGteS� valve -I'ritct�
hho n i
4/28/94
-Se.4q), l
s��s ! ��-� Cvtromtuwi
PAGE

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WHOLE EFFLUENT TOXICITY TESTING 0(SELF-MONITORING SUMMARY) Mon, Apr IS, 1994
MAR APR MAY JIIN )III. n(lG S1iP OCT
RElL IEI1WNT YEAR 7AN FEB - - FAIL -_ FAIL FAIL
1 FACILITY 90 FAIL - FAIL -.- FAIL FAIL
P2.PERM C71R LIM: I1% FAIL FAIL FAIL FAIL FAIL 18- .0 to
pLLTAMII MILLS Noncom Av ChV 91 FAIL FAILtAIL AIL 18.0 42 0 -
MAR JUN SEP DEC P R1BIL 31.0
92 FAIL FAIL FAIL.18.2 18.2,PAS5 18.0 18.0PASS
County: 90/001 Dcgin:111/92 Frequency: Q P� 42.0 18.0 18.0-County:CATAWDA Region: MRO Subbasin: CTD35 g3 18•p 18.0
Special 04 --• ---
LATE --• PASS
PF: 1.0 NS
Order: ... PASS
7QI0:0.'20 IWC(`7):88.6 90 NONE PASS PASS -.- -- PASS --- Ni
PASS FAIL
DINTON W WTP PERM CIIR LIM: 90%01 ._ PASS FAIL FAIL - - PASS
I 'S FAIL FAIL FAIL FAIL FAIL PASS
Nnuniy:689/001) Begin:12/4l92 Eminency: Q I'/F G FEB MAY AUG NOV NonCamp:SINGI.E 92 bn
FAIL NR?AIL FAIL FAIL PASS
County:DAVIDSON Region:WSRO Suhhasin:YAD(18 93 - ( (L PASS
Speeia) 9< ... PASS
PF:0.3000 Ontrc
7Q10: 0.000 IWC(%): 100.00 DUKE POWER TRAINING/111(:{1 CEN'IER/001 PERM: 2411R P/F AC LIM 90%(I7111D OR CURIO) 00
90
NC0026255/001 Dcgin:4lll94 Frequency: Q
d meMAY AUG NOV NonComp:SINGLIi 921
County:MECKL[NBURG Region: MRO Subbasin: Cl1132 92 -
Special 94
PI : 0.0200 Order PASS PASS
7Q10:80.0 1WC(%):0.03 90 PASS - - PASS - PASS -- -
DUKE POWER-ALLEN002 91 PASS PASS - •-- PASS _.
N000O4979/0(12 Begin:12/1/89 Requcncy: Q WV A JAN APR JUL OCT NonComp: 92 PASS - - - PASS PASS
Region: MRO Subbasin: CIT334 93 PASS PASS
PF:7.6:GASI'ON 8 Special -
PF:7.6 94 PASS PASS PASS
Omer. PASS
7Q10 95.0 lWC(%):I1.0 90 - PASS - - PASS PASS
PERM C11R I.IM:MA (GRAB) 9t
PASS PASS PASS - PASS
DUKE 14406/0 3 I IiWS CRl (IUW3 p: PASS PASS PASS
Nounly: 'l'OKI IIcgin:311/93 Eminency: Q P!1' A ELM MAY AUG NOV Noncom SINGLIi 82 - PASS PASS
Caunty:S'!'UKIsS Region:WSRU Subbnsin:ROA 93 ._ PASS -
Special 94 -, PASS -
P1:7.7 Order - - - - -
7Q10:24.0 IWC(%):33.0 90 -- - - - - -
PERM: 2411R P/F AC LIM 90% 91 - - - --
llUKli 24406/005 1.ISW ' CR93h/W5 G B MAY AUG NOV NonComp:S1NGLFs "- - - - N N -
NounIy: 06/005 Begin:5/1/93 Frequency: Q 92 - - N N N N N
Region: WSRO Subbasin: ROACH 93 N N N N
County:S7'OKUS g special N -
Pl'. 94 NONE' - >100'
prder. NONE' >100'
7Q10: LAKE IWC(%):NA 90 •.- NONE' _• NONE'
PERM AC LIM: >60% (GRAB) DAPH OR CERIO NONE' - >100' '-- >1�
UU)CEPOWISR- l Begin:
91 - - >100',>100' - - >100' -p MAR JUN SEP DEC NonContp: 92 - - >100' >100.>100'
_aunty 774/00'- Degin:lllP)0 Eminency: >100' - - >100' --
PE: N :ROWAN Region: MRO Subbasin: YADO4 83
Special 94 - - - PASS
I'I : NA Order. PASS - PASS -
7Q10:1030 IWC(%):.59/1 B0 ._ PASS - - - PASS - PASS
PERM CIIR 1.1M:5% (GRAB) - PASS PASS - PASS PASS
MIKE POWER-la.11•1SIUIS 91 '•" PASS PASS
N00005088/002 Begin:12/1/89 Froqucncy: Q WI, A MAR JUN SEP DEC NonContp: 02 PASS PASS PASS
County: RU'1'I11SR1'ORp Region: ARO Subbasin: ORD02 93 -- PASS -
Special 94 •- NONE >100
7F:8.80 Order - NONE - '-
7QI0 287.00 lWC(%):4.53 90 - - NONE - - >100' - >100'
PERM AC LIM:288%(GRAB) _ - >100' - >1� - _ >tt>D'
DUKE POWER-UAN RIVER 91- - ,too' >100
p MAR JUN SEP DEC NonComp: >700• >100' > O'
County: OCKI GIIA l0/2/11R9 Frequency: Q 92 - - NOON'
County:ROCKINGl1AM Reginn:WSSOC13Subbaxin:ROA03
l 93 -- >100'
1'1�:1.8 94 - --
Order:
7Q10:314.0 IWC(%):0.879 90 - -
In -PERM CIE( 1IM:6.0%(GRAB) N
DIIKISI0(17819911 l•gin:0/1/92LN Nli 01 • - .._ N
NI'(R)S(1781A10I !)cgin:')lIP)2 Fnyatrnry; Q 1'fl° MAR JUN SEP DEC NanConq,;Avg (•hV 02 -- - N N
Region: MR() Suhbnsin:C'l'B33 93 -- - N
Cuunty:I.INCO1_N g special -
9A -
PF:0.0')5
7010: '2,1 .� IWC(%1: 5.8 tinter.
0 2 •wnxrcurivt• failures -xignifirnm n,mr plianrr
Y I'm 1')')0 Data Available
I.li(iF = I>Ocrly; M-Monthly; BM• Bimonthly; SA- Semiannually: A• Annually:OWD-Only when discharging; D- Discontinued monitoring requirement: IS. Conducting independent stud)
Benin = Permit Rcquin fired Q10 = Receiving stye I0lo flow
c Frequency = Monitoring monitoring
i Q.Qusingle
7 10 = Receiving xtmam low criterion (cfs) A=qu ulerlY monitoring incenses to monthly upon I111 /(.1 Months that testing must occur • ex. JAN,APRjUL,OCI' NanComp = Currant Compliance Requirement
Benin =flex( month tcvuimd Q P!F = Pass/Fnil chronic test AC = Acute
= Pe Not.tt nrd flow thead I-'>, - Instil -am ,, .; tn. - Mtinn y )b g: 1
Data N.^�ai.nr (• Pndmn,l .:,..Moi,r:' • r d: NII N4 rep rte - ( 3. Beginning
t of I - ('beak vncur: I' • M�rty Straus:
us: I • I active N - nl w y Iss wdflo construe!):
! - Performed-Aive by IwI d All Tax (irnnp; hi •Bra• teat
1 " - - tt,i,, ...a squired; NI: � Not reported; ( ) -Beginning of Qunner Facility Activity Status: l • Inactive, N - Newly Ixxurd(' 18 eonxtrvct : I I -Active but not dixelmr •in T-More dam available for utanth in question SIG = ORC signature needed

LONG TERM MONK RING PLAN REQUEST FORM
er{ De,i 'lfc69 - 11N6r)
o 3970Q,
FACILITY: .D ei o N W t 1>
NPDES NO.: 1\1 10 0 246. 01
EXPIRATION DATE: t. f 31 l i
REGION: [t4-O
P&E REQUESTOR: 5, Wu -so
PRETREATMENT CONTACT: N P 1"
DATE: 3 Ii7(it
INDICATE THE STATUS OF PRETREATMENT PROGRAM:
1) THE FACILITY HAS NO SIU'S AND SHOULD NOT HAVE PRETREATMENT LANGUAGE.
2) THE FACILITY HAS OR IS DEVELOPING A PREATREATMENT PROGRAM.
3) ADDITIONAL CONDITIONS REGARDING THE PRETREATMENT PROGRAM ATTACHED.
PERMITTED FLOW: 2.g'&V GPll 4,•i 146114tr;,
% INDUSTRIAL N/a%
% DOMESTIC
jiff' G',+irri GtY / // /o%S •v Ai1M•
3 1 //Sa Nt /4swm r
?4.3 iSSO No Air
3 o0as No AAter
skier"
(.50 050 %wq / r a �� fi4 e Few t&Q i t
f% 49pf1fr4e L
-��J�I4
daps nr /1d✓t /eon /46�1, ror,
J
o A ew //eadworks 5;4c.e fqqo
No , r 0141 A -To /toe oil di s

State of North Carolina
Department of Environment, Health, and Natural Resources
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27604
James G. Martin, Governor George T. Everett, Ph.D.
William W. Cobey, Jr., Secretary Director
June 11, 1992
Mr. Daniel W. Pritchett,
Jamestown Engineering Group, Inc.
101 Depot Street
P.O. Box 365
Jamestown, NC 27282
SUBJECT: Town of Denton
NPDES No. NC0026689
Davidson County
Dear Mr. Pritchett
The Technical Support Branch has received your inquiry regarding the Town of Denton's possible
increase in wasteflow and relocation.
Two alternative discharge points were submitted for review. Both potential discharge points are
located in the hydrographic area the United States Geological Survey (USGS) terms the Carolina
Slate Belt. Based on USGS data compiled by Giese and Mason, any location having a drainage
area of less than 12 square miles would yield a 7Q10 (summer) = 0.0 cfs, 7Q10 (winter) = 0.0 cfs,
and 30Q2 = 0.0 cfs.
The first alternate discharge point, above SR 2504 on the unnamed tributary to Lick Creek, had a
4.2 mi2 estimated drainage area. The Town of Denton's relocation and expansion would not be
allowed at this point, due to the stipulations presented in 15A NCAC 2B .0206(d)(2).
Regional Offices
Asheville Fayetteville Mooresville Raleigh Washington Wilmington Winston-Salem
704/251-6208 919/486-1541 704/663-1699 919/133-2314 919/946-6481 919/395-3900 919/896-7007
Pollution Prevention Pays
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

The second alternate discharge point, downstream on Lick Creek, had a drainage area of
approximately 27 mi2. Based on the USGS partial record station downstream, this point would
also yield a 7Q10 (summer) = 0.0 cfs. However, the 30Q2 was estimated to be positive. The
Division would allow the Town of Denton to relocate to this point. Based on current operating
procedures, upon expansion and relocation, the following limits would apply:
Parameter
BOD5 (nig/1)
NH3-N (mg/1)
DO (mom)
TSS (mg/1)
Fecal conform (#/100 ml)
Chlorine (µg/1)
Summer/Winter
5/10 !,,
1/1.8
6/6
30/30
200/200
17/17
These limitations would be applicable to both 0.6 and 1.0 MGD. Metals limits would have to be
evaluated when the facility submits a formal request for a permit; due to the lack of flow and
subsequent lack of dilution in the receiving stream, any metals to be limited would have to meet the
state water quality standard.
The limitations presented above are speculative, and should be used for planning purposes only.
These limitations would become final only when included in the NPDES permit If you have any
questions regarding this matter, please contact me at [phone].
Sincerely yours,
2,e-L C dtcriAa_
Ruth C. Swanek, Supervisor
Instream Assessment Unit
cc: Steve Mauney, Winston-Salem Regional Office
Coleen Sullins, Permits and Engineering Unit
Central Files

JAMESTOWN ENGINEERING GROUP, INC.
CIVIL • SANITARY • SURVEYING
101 Depot Street • V.O. Box 365 • Jamestown, N.C. 27282
Telephone [phone] Fax [phone]
May 26, 1992 ii
Ms. Ruth Swanek
Permits and Engineering Unit
Division of Environmental Management
N. C. Department of Environment, Health
And Natural Resources
Post Office Box 29535
ltl.li ♦.._gil, "Y • • -. I VL'J-JJ JJ
S
Re: Wastewater Treatment Plant Improvements
Town Of Denton
Davidson County
NPDES Permit No. NC0026689
JEG File Nos. 92023 and 92006
Dear Ms. Swanek:
RECEIVED
MAY 2 7 1992'
TECHNICAL SUPPORT BRANCH
With regards to the referenced facility, and on behalf of the
Town Of Denton, we request that speculative wasteloads be provided
for discharge rates of 0.600 MGD and 1.000 MGD at the two alternate
discharge points indicated on the attached USGS Quadrangie Map.
Presently, the Town discharges to the upper reaches of an
unnamed tributary to Lick Creek, which is also indicated on the
attached map. Future NPDES renewals will require the Town 1.
extend. their .existing effluent line downstream to eliminate this
discharge to a 7Q10 zero flow stream. The Town is also evaluating
alternatives of increasing its' plant capacity to the indicated
rates in the next several years.
The requested wasteluads will be utilized in determining the
extent of effluent line extension necessary, as well as projecting
costs required for the facility's upgrading.
If any additional information is required, please call.
Yours very truly,
JAMESTOWN ENGINEERING GROUP, INC.
DWP/cp
cc: Mr. John Everhart, Town Manager
Mr. Mike Mickey, Winston Salem Regional Office
Charles J. Jones, PE & RLS • Daniel W. Pritchett, PE

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