NC0037834_Wasteload Allocation_19910918

NPDES DOCUMENT SCANNING COVER SHEET
NC0037834
Archie Elledge WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
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:
September 18, 1991
This; document la printed on reuse paper - ignore any
content on the rererse slide

D RA FT R EQ U ESTNPDES WASTE LOAD
PERMIT NO.: NC0037834
PERMITTEE NAME: City of Winston-Salem / Archie Elledge
Facility Status: Existing
Permit Status: Renewal
Major
Pipe No.: 001
Minor
Design Capacity: 30.0 MGD
Domestic (% of Flow): 77.6 %
Industrial (% of Flow): 22.4 %
Comments:
pretreatment information attached
RECEIVING STREAM: Salem Creek
Class: C
Sub -Basin: 03-07-04
Reference USGS Quad: C 17 SE (please attach)
County: Forsyth
Regional Office: Winston-Salem Regional Office
Previous Exp. Date: 10/31/91 Treatment Plant Class: Class IV
Classification changes within three miles:
none
Requested by:
Prepared by:
Reviewed by:
Rosanne Barona
Co
Date:
Date:
Date:
-6_
Modeler
Date Rec.
n
J-..1
3(17-k 1
Ca,?-,(
Drainage Area (mi2 ) (p 7 3 Avg. Streamflow (cfs): (lis
7Q10 (cfs) 15 Winter 7Q10 (cfs) 30Q2 (cfs) 1q
Toxicity Limits: IWC % Acute/Chronic
Instream Monitoring: '/
Parameters -em «.+ful c' C,7r 1�i x h �n fi { fecal col, fbrrr7
Upstream .1 Location lern fiti. al. V211.1)
Downstream`/ (3 local -cm) Location 2>�IY1,�6irrEk i- Q
aim„,�,
Effluent
Characteristics
Summer
Winter
BOD5 (mg/1)
01
~-30
NH 3 -N (mg/1)
1, Q (AT-)
q l s) ,Tr`
D.O. (mg/1)
cp. .5
c e . 5
TSS (mg/1)
30
F. Col. (/100 ml)
-)00
pH (SU)
(Q - q
G
&dm. urn (.tir 1111)
wK]LI Avci
rrr�ti
a; . (.1
l O
j
Chmm;urn /.inch/)
Leca
au2'4
Nrcke I (A f2)
11t..4
"-; 4J
Lead (.0 l.Q)
cat, uornc .1 F#efreal»r/4
1 m, tron`rPoto
33
'45
a Ibl►cchc. Pi-we/that-
ont4 1 r Xid,'nrurn k
b meet Ca&
r I. clear Own ch le
)
Comments: Q,(ov,.,erevi / egIuertF ri,fi)o,tor TP. Tg Copper
(r. zinc lin;de. Man,harrrx1' / ec�uerrc Ny JrnPlai; cry CA1 d
be t,c)j y. GN 1,rn,-roppe?d = d ?'1 xvm ita/
C\daasMal ►cad. C,oWcl rem, its wefireafvle - pe►'utt"
1�VIiL orezd-
ce

SEP-04-1991 08:59 FROM ELLEDGE PLANT
TO 19197339919 P.02
PUBLIC WORKS
DEPARTMENT
Otyof Winton&iern
September 4, 1991
Ms. Ruth C. Swerve k
Supervisor Instream Assessment Unit
N. C. Dept. of Environment, Health
and Natural Resources
512 North Salisbury Street
Raleigh, NC 27604
Dear Ms. Swanek:
This is in response to your letter July 24, 1991 regarding
the model runs for NPDES No. NC0037834 for the Archie Elledge
Wastewater Treatment Plant. After careful review of plant perfor-
mance data, we feel the best overall limits for our facility would
be the following:
Model Run Ammonia (mg/1) D. 0. (mg/1) 80D5 (mg/1)
4 1.2 6.5 21
Since we have chosen the ammonia toxicity limit which is the
most stringent, I understand the ammonia limit is a monthly aver-
age limit only. (There will be no weekly ammonia limit). Since
our winter 50D limit would not be doubted under this scenario, I
would like consideration be given for a higher winter ammonia
limit greater than the 2.4 based on toxicity, if possible.
In addition, based on our telephone conversation August 28.
1991, I understand that our D. 0. limit for monitoring can be a
one time grab or the average of several grabs during the day for
reporting purposes. In regards to the metals limit, I feel it
would be in our best interests to accept a weekly average with a
weekly monitoring frequency.
Box 2511, Winston-Salem, North Carolina 27102

SEP-04-1991 08:59 FROM ELLEDGE PLANT TO 19197339919 P.03
Ms. Ruth C. Swanek
September 4, i 991
Page 2
I would like to thank you and your staff for your cooperation
and assistance in our requests during this renewal process.
pc:
lr
If there are further questions, please advise.
Sincerely,
Tom Griffin, Utilities Superintendent
Barry Shearin, Utility Plants Engineer
Stan Webb, Muddy WTP Superintendent
TP Superintendent
TOTAL P.03

FACT SHEET FOR WAS lELOAD ALLOCATIONS
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:
Winston-Salem/Archie
NC0037834
77.6% Domestic
Existing
Renewal
Salem Creek
C
030704
Forsyth
WSRO
R. Barona
3/12/91
C17SE
RECEIVED
N.C. i�,;��. NRCD
MAR 25 t.99t
Winston-Salem
Request # 6131 Regional Office
Elledge WWTP
tc
APR
pfl MITS :, cNRINPTPIMr
Stream Characteristic:
USGS #
Date:
Drainage Area:
Summer 7Q10:
Winter 7Q10:
Average Flow:
30Q2:
02115857
1988
67.3
15
18
65
19
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
A QUAL2E model was developed in 1990 to determine if the existing BOD and NH3 limits are
adequate to protect the DO standard instream during critical low flow conditions. The modeling
results indicated that the Archie Elledge WWTP needs limits of 16 mg/1 BODS, 2 mg/1 NH3, and 6
mg/1 DO to protect the DO standard. The modeling results were supported by 5 instream violations
ranging from 2.6 to 4.9 mg/1 during 1988. The City was informed of these limits changes in a
letter dated July 25, 1990. A copy of the modeling report can be obtained from the Technical
Support Branch.
Special Schedule Requirements and additional continents from Reviewers:
Recommended by: /r1)UC_ Satii cl.c
Reviewed by
nt: r � (1,)
M�
Regional Supervisor:
Date: 3//J1-/
Date:
. Date:"
Permits & Engineering: Date: `i(3(4 i
RETURN TO TECHNICAL SERVICES BY: A P P ' [ n ! ` i `:3

2
CONVENTIONAL PARAMETERS
Existing Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Col. (/100 ml):
pH (SU):
Oil & Grease (mg/1):
TP (mg/1):
TN (mg/1):
Recommended Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Col. (/100 ml):
pH (SU):
Oil & Grease (mg/1):
TP (mg/1):
TN (mg/1):
Limits Changes Due To:
Instream Data
Ammonia Toxicity
Chlorine
Nutrient Sensitive Waters
HQW
New 7Q10 flow data
Special Modeling Studies
New facility information
Other
Monthly Average
Summer Winter
30 30
19 30
3 9
5 5
30 30
1000 1000
6-9 6-9
Monitor Monitor
Monitor Monitor
Monthly Average
Summer Winter
30 30
16 30
2 4
6 6
30 30
200 200
6-9 6-9
Monitor Monitor
Monitor Monitor
Parameter(s) Affected
BOD5, NH3, DO
NH3
BOD5,NH3,DO
City wanted to know how limits would change if it augmented flow through a minimum release
from Salem Lake. The model was insensitive to the upstream flow, and the only change which
would occur would be a 3 mg/1 summer NH3 limit at a 7Q10 flow of 20 cfs.
Compliance data indicate that facility can meet proposed limits.

3
Toxicity Limit
Existing Limit:
Recommended I imit:
Toxics
Existing Limits:
Cadmium (ug/l):
Chromium (ug/1):
Copper (ug/1):
Nickel (ug/1):
Lead (ug/1):
Zinc (ug/1):
Recommended Limits:
Cadmium (ug/1):
Chromium (ug/1):
Copper (ug/l):
Nickel (ug/l):
Lead (ug/1):
Zinc (ug/1):
Cyanide (ug/1):
TOXICS
Monitoring Schedule
Mar, Jun, Sep, Dec
None
Chronic Quarterly Ceriodaphnia t' 1A )
or metals limits
62
Monitoring
66
Monitoring
Weekly Avg
2.6
66
Monitor
116
33
Monitor
6.6
Limits Changes Due To:
New pretreatment information
Failing toxicity test
Other (onsite toxicity study, interaction, etc.)
Additional Information on Above Limits:
Daily Maximum
10
264
464
45
26
D13 max at 7Q10
= 18 cfs
2.8
69
Monitor
122
35
Monitor
6.9
Parameter(s) Affected
Cd, Cr, Ni, Pb, CN
New Ni Standard
tri.ctGE y
A�-
= 20 cfs
2.9
72
Monitor
126
36
Monitor
7.1
at 7Q1(
The City of Winston-Salem submitted a letter on March 1 requesting that their metals limits be
weekly average. If the City chooses to monitor for metals daily, it can receive metals limits in
terms of both daily maximum and weekly average as given in the "Weekly Avg" and "Daily Max"
columns in the above table. If the City chooses to monitor for metals weekly, it will be assigned
daily maximum limits equal to the "Weekly Avg" limits given in the above table. The City must
choose which monitoring frequency it prefers and this frequency will be set for the life of the
permit. The City will be sent a letter informing them of this option. If the City does not respond,
weekly monitoring will be assumed with the weekly average limits assigned as daily max. The last
two columns in the above Table are provided since the City also wanted to know how its limits
would change if stream flow was augmented through releases from Salem Lake. If the City
chooses to augment stream flow, they may monitor daily for metals and the limits given above
would be weekly average and new daily maximum values would be calculated per SOP.

4
MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS
Miscellaneous information pertinent to the renewal or new permit for this discharge. Include
relationship to the Basinwide management plan.
INSTREAM MONITORING REQUIREMENTS:
Upstream: Location: 1 Salem Ck at SR 1120
Downstream: Location: 3 Salem Ck at SR 2991, Muddy Ck at SR
1493, Muddy Ck at SR 1485
Parameters: DO, temperature, conductivity, fecal coliform
Special Instream monitoring locations or monitoring frequencies:
Instream monitoring location added at Muddy Ck at SR 1493 since pooling occurs in Muddy
Creek, and DO violations have been observed instream.
SPECIAL INSTRUCTIONS OR CONDITIONS
WASTELOAD SENT TO EPA?(Major) Y (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 fits into basinwide plan)
Modeling report submitted to EPA earlier.
Additional Information attached? (yes or no) If yes, explain attachments. Schematic, toxics
spreadsheet.

02.1 158.2500 (88)
DA-I 15MI
OA-112 CFS
57010-12 CFS
W70 10-27 CFS
3002 = 31 CFS
02.1156.7980
DA=1943 MI
0A=1826 CFS
S7010=548 CFS
W7010=1 102 CFS
FIGURE 2
MUDDY CREEK
-6
R3=1.3 MI
R4=0.4 MI
R5=0.3 MI
R6=2.0 MI
R7=2.0MI
SC-5
SR 2991
SC- SC-1
SR 1 120
02.1 158.5810(88)
DA■70.9 MI
• OA-69 CFS
S7010-I6 CFS
SC-7 W7010.19 CFS
SR 2995 3002.20 CFS
SR 290
SC-8
SC-10
SR 1520
SC-12
SR 1485
SC-11
SR 1493
02.1 1594902(88)
DA-11.6MI
0A•II CFS
57010-0.5 CFS
W70I0.1.8 CFS
3002.2.6 CFS
02.1139.6000 (88)
DA=260 MI
0A=247 CFS
S7010=65 CFS
W7010=92 CFS
3002=116 CFS
ARCHIE ELLEDE WWTPsc-2
02.1 158.5710(88)
DA-67.30 MI
0A•65 CFS
57010.15 CFS
W7010•I8 CFS
3002-19 CFS
02.1 159.0200(88)
DA=45.I MI
0A•43 CFS
57010-7 CFS
W7010-14 CFS
3002.16 CFS

Replaced oineo PYnt
(5te-- riext Vie)
10/89
Facility Name k)in3bn-`jatein Archie £Jlec(e th2'P Permit # NCOQ3 34
CHRONIC TOXICITY TESTING REQUIREMENT (QR'I'RLY)
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 *September 1989) or subsequent versions.
The effluent concentration at which there may be no observable inhibition of reproduction or
significant mortality is To % (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 IYhr j,,,tn .fcp, '')e c . Effluent
sampling for this testing shall be performed at the NPDFrS permitted final effluent discharge below
all treatment processes.
Al! tnyi ifv tectincr recn1tc rP.nnirerl nv nnrt of this nPrmlt rnnrditinn will he. enterer! nn 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 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 15 cfs
Permited Flow 30 MGD Recommended by:
IWC% `75, t o
Basin & Sub -basin 'dog Receiving Stream Salem_ Gta. l,f,&Z C. Stvo/Laie__
County Fivvit Date 3Jr5/gl
**Chronic Toxicity (Ceriodaphnia) P/F at 7/ %, 1Y1rYJu?Sy, tec. , See Part , Condition

Facility Name 1Olrnbn-S/P/r1 - Archie ElkticePermit# AtCO3-78I Pipe # OD(
CHRONIC TOXICITY PERMIT LIMIT (QRTRLY)
(**Chronic Toxicity (Ceriodaphnia) ChV at .3.11%, I brJun,sep, ; , See Part , Condition .)
The effluent discharge shall at no time exhibit 48 hour acute toxicity as lethality in an
effluent concentration of % nor measure a ggarterly arithmetic average chronic value
less than this same percentage of waste. The chronic value will be determined using the
geometric mean of the highest concentration having no statistically detectable impairment of
reproduction or survival and the lowest concentration that does have a statistically
detectable impairment of reproduction or survival. The presence of 48 hour acute toxicity
will be determined using Fisher's Exact Test at 48 hours from test initiation. Collection
methods, exposure regimes, and further statistical methods are defined in: The North
Carolina Phase 11 Chronic Whole Effluent Toxicity Test Procedure (July, 1991) or
subsequent versions.
The permit holder shall perform at a minimum, quarterly monitoring using these procedures
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 Mar, Jun °p
Effluent sampling for this testing shall be performed at the NPDES permitted final effluent
discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter measures 48 hour acute
toxicity or a chronic value less than that specified above, then multiple concentration testing
shall be performed, at a minimum, in each of the two following months.
All toxicity testing results required as part of this permit condition will be entered on the
Effluent Discharge Monitoring Form (MR-1) for the months in which tests were
performed, using the parameter code THP3B for the Chronic Value and TGA3B for the 48
hour Acute Toxicity measure (Pass/Fail). Additionally, DEM Form AT-3 (original) is to be
sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of
Environmental Management
4401 Reedy Creek,Road
Raleigh, NC 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 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.
Permitted Flow `C MGD Basin & Sub -basin \lad 04
7Q10 15 cfs Receiving Stream 5ahrn C!
IWC 7U % County (-si el
Recommended by: C. Date: q1 1q r
PIIQLR Version 7/91

03/14/91 ver 3.1 TOXICS REVIEW
Facility: Winston-Salem - Archie Elledge
NPDES Permit No.: NC0037834
Status (E, P, or M): E
Permitted Flow: 30.0 mgd
Actual Average Flow: 19.3 mgd
Subbasin: 030704
Receiving Stream: Salem Ck I PRETREATMENT DATA I----EFLLUENT DATA---- I
Stream Classification: C I ACTUAL PERMITTED! I
7Q10: 15.0 cfs I Ind. + Ind. + 1Malt' FREQUENCY I
IWC: 75.61 % I Domestic PERMITTED Domestic 1 OBSERVED of Chronic)
Stn'd / Bkg 1 Removal Domestic Act.Ind. Total Industrial Total 1 Eflluent Criteria I
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)I
Cadmium S 2.0 1 75% 0.90 2.23 3.13 0.45 1.350 1 I
Chromium S 50.0 I 76% 3.67 4.45 8.12 2.89 6.560 1 17.0 0131 I I
Copper AL 7.0 1 81% 13.72 11.26 24.98 8.68 22.400 1 60.0 2'9131 I N
Nickel S 88.0 1 12% 3.76 3.78 7.54 3.55 7.310 1 52.0 0131 I P
Lead S 25.0 I 70% 2.86 3.93 6.79 1.23 4.090 1 1 U
Zinc AL 50.0 I 69% 23.20 33.12 56.32 2.45 25.650 1 215.0 25131 1 T
Cyanide S 5.0 1 0% 0.97 0.970 1 I
Mercury S 0.012 1 0% 1 1 S
Silver AL 0.06 1 0% 0.35 0.350 I 1 E
Selenium S 5.00 I 0% 1 I C
Arsenic S 50.00 1 0% 1 1 T
Phenols S NA I 0% 1 1 I
NH3-N C I 0% 1 1 0
T.R.Chlor.AL 17.0 1 0% 1 1 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
1 Allowable CHRONIC ACTUAL PERMIT using ACTUAL PERMITTED OBSERVED 1 Eff. Mon. Monitor.
Pollutant I 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 1.94 2.645 4.858 2.096 0.00 Limit Limit 1 I A
Chromium S I 50.40 66.129 12.100 9.775 12.85 Limit Limit Limit I NCAC NO I N
Copper AL 1 8.91 9.258 29.469 26.425 45.37 Monitor Monitor Monitor I Weekly YES I A
Nickel S 1 24.19 116.387 41.197 39.941 39.32 Limit Limit Limit I NCAC NO I L
Lead S 1 20.16 33.065 12.648 7.618 0.00 Limit Limit I 1 Y
Zinc AL 1 39.02 66.129 108.403 49.370 162.56 Monitor Monitor Monitor 1 Weekly YES 1 S
Cyanide S 1 1.21 6.613 0.000 6.023 0.00 Limit 1 I I
Mercury S 1 0.00 0.016 0.000 0.000 0.00 1 I S
Silver AL I 0.01 0.079 0.000 2.173 0.00 Monitor 1 I
Selenium S 1 1.21 6.613 0.000 0.000 0.00 1 1 R
Arsenic S 1 12.10 66.129 0.000 0.000 0.00 1 1 E
Phenols S 1 0.000 0.000 0.000 0.00 1 I S
NH3-N C 1 0.000 0.00 1 1 U
T.R.Chlor.AL 1 22.484 0.00 I 1 L
I I IT
I I I S
I I
ice' U'1
upol
6b5. dritkvA1 data 1M 21go - 1 jq 1 Dilly -5. Foc,Iil /nondor1r� meaty kr Cr, Cu, AA; zn
brad � � 5
Cent g le s only had atfa 7/ct0 a✓-+.ccu�.l Clum�t. re�kc �! e daf Ap

)irdon - Salem -A'cki 61
Salem C. 3/F/q/
03 7a4
.. 2ece� ved _ letter from 1(5 . re +.0 ifaki n jc - eaula v_e dad() /1mF
Qik) _ 3U il(D = L.5 c6 70ro = cFS
CrJ Weel Avj = a.i2 .61,E
(p)LQp)' (C) Qt4) = _ccfl_0(1)
U (.CU)((5)(c,e',5>
Cup _ L, iit 151i
vit . G00-i-e.. t 12. ein = 0,5 r d ectax
ecai Ctuc\
/0.4 ..i4ja___CL
Od = I5 Ftko,S= CAI.5
aaaoeci (5aEi j a - l�(it)
fnv h*_
atuJ
= 5(esU) .,.• (ice = 21t&i
GOL ' - lr ) - /►Le_ -. 4.4 ),P
Pb '12FAv
ett) (Riffe_.&30( (J2 ) 14,9'
CA( = 3r tjj
CL (31)(Lk (, 5)/4 ‘ 5 = NI ,t-Lcyfi tutuki cause
C,t m a.U = kfie CL LOCI-C-0 CC-1., bn t u.c. 4_
-2tI�P

•. cu-ljmen.f -rime fo fg ccs
03/14/91 ver3.1 TOXICS REVIEW
Facility: Winston-Salem - Archie Elledge
NPDES Permit No.: NC0037834
Status (E, P, or M) : E
Permitted Flow: 30.0 mgd
Actual Average Flow: 19.3 mgd
Subbasin: 030704
Receiving Stream: Salem Ck I PRETREATMENT DATA I----EFLLUENT DATA---- I
Stream Classification: C I ACTUAL PERMITTED) I
7Q10: 18.0 cfs I Ind. + Ind. + 1 FREQUENCY I
IWC: 72.09 % I Domestic PERMITTED Domestic 1 OBSERVED of Chronic)
Stn'd / Bkg 1 Removal Domestic Act.Ind. Total Industrial Total 1 Eflluent Criteria I
Pollutant AL Conc. 1 Eff. Load Load Load Load Load 1 Conc. Violations)
(ug/1) (ug/1) 1 4 (#/d) (#/d) (#/d) (#/d) (#/d) 1 (ug/1) (#vio/#sam)1
I I I
Cadmium S 2.0 1 75% 0.90 2.23 3.13 0.45 1.350 1 I
Chromium S 50.0 1 76% 3.67 4.45 8.12 2.89 6.560 1 17.0 I I
Copper AL 7.0 1 81% 13.72 11.26 24.98 8.68 22.400 1 60.0 I N
Nickel S 88.0 1 12% 3.76 3.78 7.54 3.55 7.310 1 52.0 I P
Lead S 25.0 1 70% 2.86 3.93 6.79 1.23 4.090 1 I U
Zinc AL 50.0 1 69% 23.20 33.12 56.32 2.45 25.650 1 215.0 I T
Cyanide S 5.0 1 0t 0.97 0.970 1 I
Mercury S 0.012 1 0% 1 I S
Silver AL 0.06 1 0S 0.35 0.350 1 I E
Selenium S 5.00 1 0% 1 I C
Arsenic S 50.00 1 0% 1 I T
Phenols S NA 1 0% 1 I I
NH3-N C 1 0% 1 I O
T.R.Chlor.AL 17.0 1 0% 1 I N
I I I
I I I
I I I
ALLOWABLE PRDCT'D PRDCT'D PRDCT'D MONITOR/LIMIT 1--ADTN'L RECMMDTN'S--
I Effluent Effluent Effluent Instream 1 Recomm'd
Conc. using using Conc. Based on Based on Based on 1 FREQUENCY INSTREAM
I Allowable CHRONIC ACTUAL PERMIT using ACTUAL PERMITTED OBSERVED 1 Eff. Mon. Monitor.
Pollutant 1 Load Criteria Influent Influent OBSERVED Influent Influent Effluent 1 based on Recomm'd ?
(#/d) (ug/1) (ug/1) (ug/1) (ug/i) Loading Loading Data 1 OBSERVED (YES/NO)
Cadmium S 1 2.06 2.774 4.858 2.096 0.00 Limit Limit 1 1 A
Chromium S 1 53.77 69.355 12.100 9.775 12.26 Limit Limit Limit 1 NCAC NO 1 N
Copper AL 1 9.51 9.710 29.469 26.425 43.26 Monitor Monitor Monitor 1 Weekly YES 1 A
Nickel S 1 25.81 122.065 41.197 39.941 37.49 Limit Limit Limit 1 NCAC NO I L
Lead S 1 21.51 34.677 12.648 7.618 0.00 Limit Limit 1 1 Y
Zinc AL 1 41.63 69.355 108.403 49.370 155.00 Monitor Monitor Monitor 1 Weekly YES 1 S
Cyanide S 1 1.29 6.935 0.000 6.023 0.00 Limit 1 1 I
Mercury S 1 0.00 0.017 0.000 0.000 0.00 1 1 S
Silver AL 1 0.02 0.083 0.000 2.173 0.00 Monitor 1 I
Selenium S 1 1.29 6.935 0.000 0.000 0.00 1 1 R
Arsenic S 1 12.90 69.355 0.000 0.000 0.00 1 1 E
Phenols S 1 0.000 0.000 0.000 0.00 ( I S
NH3-N C 1 0.000 0.00 1 I U
T.R.Chlor.AL 1 23.581 0.00 1 1 L
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i i IS

Sf ou�ed .chow tt) 20 cfa
03/14/91 ver 3.1 TOXICS REVIEW
Facility: Winston-Salem - Archie Elledge
NPDES Permit No.: NC0037834
Status (E, P, or M): E
Permitted Flow: 30.0 mgd
Actual Average Flow: 19.3 mgd
Subbasin: 030704
Receiving Stream: Salem Ck I PRETREATMENT DATA I----EFLLUENT DATA---- I
Stream Classification: C I ACTUAL PERMITTEDI I
7Q10: 20.0 cfs I Ind. + Ind. + 1 FREQUENCY I
IWC: 69.92 % I Domestic PERMITTED Domestic 1 OBSERVED of Chronic)
Stn'd / Bkg 1 Removal Domestic Act.Ind. Total Industrial Total 1 Eflluent Criteria I
Pollutant AL Conc. 1 Eff. Load Load Load Load Load 1 Conc. Violations)
(ug/1) (ug/1) 1 % (#/d) (4/d) (4/d) (4/d) (#/d) 1 (ug/1) (4vio/4sam)1
Cadmium S 2.0 1 75% 0.90 2.23 3.13 0.45 1.350 1 I
Chromium S 50.0 1 76% 3.67 4.45 8.12 2.89 6.560 1 17.0 1 I
Copper AL 7.0 1 81% 13.72 11.26 24.98 8.68 22.400 1 60.0 1 N
Nickel S 88.0 1 12% 3.76 3.78 7.54 3.55 7.310 1 52.0 1 P
Lead S 25.0 1 704 2.86 3.93 6.79 1.23 4.090 1 1 U
Zinc AL 50.0 1 69% 23.20 33.12 56.32 2.45 25.650 1 215.0 1 T
Cyanide S 5.0 1 0% 0.97 0.970 1 I
Mercury S 0.012 1 0% 1 1 S
Silver AL 0.06 1 0% 0.35 0.350 1 1 E
Selenium S 5.00 1 0S 1 1 C
Arsenic S 50.00 1 0% 1 1 T
Phenols S NA 1 0% 1 1 I
NH3-N C 1 0% 1 1 0
T.R.Chlor.AL 17.0 1 0% 1 1 N
ALLOWABLE PRDCT'D PRDCT'D PRDCT'D MONITOR/LIMIT I--ADTN'L RECMMDTN'S--
1 Effluent Effluent Effluent Instream 1 Recomm'd
Conc. using using Conc. Based on Based on Based on 1 FREQUENCY INSTREAM
1 Allowable CHRONIC ACTUAL PERMIT using ACTUAL PERMITTED OBSERVED 1 Eff. Mon. Monitor.
Pollutant 1 Load Criteria Influent Influent OBSERVED Influent Influent Effluent 1 based on Recomm'd 2
(#/d) (ug/1) (ug/1) (ug/1) (ug/1) Loading Loading Data 1 OBSERVED (YES/NO)
Cadmium S 1 2.15 2.860 4.858 2.096 0.00 Limit Limit 1 1 A
Chromium S 1 56.02 71.505 12.100 9.775 11.89 Limit Limit Limit 1 NCAC NO 1 N
Copper AL 1 9.91 10.011 29.469 26.425 41.95 Monitor Monitor Monitor 1 Weekly YES 1 A
Nickel S 1 26.89 125.849 41.197 39.941 36.36 Limit Limit Limit 1 NCAC NO 1 L
Lead S 1 22.41 35.753 12.648 7.618 0.00 Limit Limit 1 1 Y
Zinc AL 1 43.37 71.505 108.403 49.370 150.34 Monitor Monitor Monitor 1 Weekly YES 1 S
Cyanide S 1 1.34 7.151 0.000 6.023 0.00 Limit 1 1 I
Mercury S 1 0.00 0.017 0.000 0.000 0.00 1 1 S
Silver AL 1 0.02 0.086 0.000 2.173 0.00 Monitor 1 I
Selenium S 1 1.34 7.151 0.000 0.000 0.00 1 I R
Arsenic S 1 13.44 71.505 0.000 0.000 0.00 1 1 E
Phenols S 1 0.000 0.000 0.000 0.00 1 I S
NH3-N C 1 0.000 0.00 1 1 U
T.R.Chlor.AL 1 24.312 0.00 1 1 L
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I I I 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
July 24, 1991
Mr. Lee Byerly
Archie Elledge WWTP Superintendent
City of Winston-Salem
P.O. Box 2511
Winston-Salem, NC 27102
Subject: Items Discussed at July 9 meeting
Archie Elledge WWTP
NPDES No. NC0037834
Forsyth County
Dear Mr. Byerly:
I am writing to follow up on several items discussed at our meeting on July 9. I have completed
further model runs to determine what your summer BOD5 limit will be under different effluent
ammonia and dissolved oxygen (DO) concentrations. The results are as follows:
Model Run Ammonia (mg/I) DO (mg/I) BOD5 (mg/I)
1 2 7 20
2 1.2 7 24
3 2 6.5 18
4 1.2 6.5 21
5 1 6.5 21
You should note that 1.2 mg/I would be your ammonia limit if it were based on ammonia toxicity.
Please inform me of your preferred set of effluent limits by August 31. The corresponding
winter limits would be twice the summer limits, but the BOD5 limit cannot exceed 30 mg/I.
Since BOD5 would not be doubled under any of the scenarios, a higher ammonia limit could be
assigned if the model predicted that DO standard violations would not occur. However, for plant
design purposes, you should note that your winter ammonia limit based on toxicity would be 2.4
mg/I.
You were also concerned that dredging operations upstream of your downstream monitoring site on
Muddy Creek were influencing the dissolved oxygen concentrations. A review of the daily
monitoring reports (DMRs) indicated that there were elevated solids at the sampling station
located on Muddy Creek as compared to your downstream station on Salem Creek, but the solids
increase did not appear to be correla�tedup DOPreyention Pays
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

Since your cyanide limit was based on the permitted industrial load, and the data you provided at
the meeting indicate that cyanide is not present in your effluent, the limit will be replaced with a
monitoring requirement. However, the City should evaluate the permitted levels of cyanide and
revise its limits accordingly.
Our Pretreatment staff is reviewing the cadmium information which you provided to us, and a
dialog has been established with the State Pollution Prevention Program. It appears that
municipal or industrial pretreatment will not adequately address the problem given the relatively
low concentrations involved. Therefore, your efforts will likely need to focus on source
reduction at industries and at commercial establishments. It is my understanding that either
Pretreatment staff or representatives of the Pollution Prevention Program will contact the City
to discuss this matter further. Therefore, your limit will most likely be revised to a monitoring
requirement during an interim permit period with a plan of action outlined as a special permit
condition to come into compliance with final limits.
If you have any questions or comments, please contact me at [phone].
Sincerely,
Zu. c. ,StoclAei
Ruth C. Swanek, Supervisor
Instream Assessment Unit
cc: Dale Overcash
Steve Mauney
Julia Storm
Central Files
Pollution Prevention Pays
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

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