NC0046728_Wasteload Allocation_19900320

NPDES DOCIMENT !;CANNING COVER SHEET
NPDES Permit:
NC0046728
Mooresville / Rocky River WWTP
Document Type:
Permit Issuance
(Wasteload
Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Permit
History
Document Date:
March 20, 1990
This document is printed on reuse paper - igriore any -
content on the reYerse side

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0046728
PERMITTEE NAME: Town of Mooresville / Town of Mooresville
Facility Status: Existing
Permit Status: Modification
Major Minor
Pipe No.: 001
Design Capacity: 5.2 MGD
Domestic (% of Flow): 20 %
Industrial (% of Flow): 80 %
Comments:
See attached letter for modification request.
RECEIVING STREAM: Dye Creek
Class: C
Sub -Basin: 03-07-11
Reference USGS Quad: E15SE
(please attach)
County: Iredell
Regional Office: W o o v e 4 i i 1l e_
Previous Exp. Date: 2/28/94 Treatment Plant Class: Class IV
Classification changes within three miles:
Requested by:
Prepared by:
Reviewed by:
ula Harris
C s�1trzattle_
y-
q0
Date: 2/27/90
Date:
Date: ' - o
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kite /,s 4)111 remcuut- Wz. s 'ne.
Modeler
Date Rec.
#
GMAS
z(z? 1 k 0
SIa O S
Drainage Area (mi2 ) , 4 Avg. Streamflow (cfs): 5
7Q10 (cfs) 0.5 Winter 7Q10 (cfs) 0. q 30Q2 (cfs) 1.
Toxicity Limits: IWC % Acute/Chronic
Instream Monitoring:
Parameters
Upstream Location
Downstream Location
L,\,,3 Z e- ckr,v s v\ �
Effluent
Characteristics
Ake ,f i y r4IN
/y /yam
BOD5 (mg/1)
NH3-N (mg/1)
D.O. (mg/1)
TSS (mg/1)
F. Col. (/100 ml)
PLO
ED
pH (SU)
C(jotn;d c (,u91.2)
3
I
Codnturn 061.I)
2.
65 3
Lead Cask())
2Ct
3U
Chavn ion (,u5fk)
52-
20 S
nl,c&J (,144/J)
q3
372
Comments: GFlunnf Mc ;harinq 1Y Mr five lolled mekz(s repitec/
ittvnthf{ th lhrE Fria'u . rF /ilanr r,i snv1'i�lc f.� e a�.e�iy a�l e
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WASTELOAD ALLOCATION APPROVAL FORM
5C05
Request No: :11r$�9T Mod.
1PC. DEPT. OF NATURAL,
_ SUWW S• ANB.
COMMUNITY 7.-VEI.OPMENT
Facility Name: Town of Mooresville DEB G 8
NPDES No.: NC00467281990
Type of Waste: 20% Domestic
Status: Existing Modification DID'!"! "
Receiving Stream: Dye Branch rya Co-si514- h1�u� KLLI;;,l Grfla
Classification: C
Subbasin: 030711 Drainage area: 4.8
County: Irede„4 Summer 7Q10: 0.50
Regional Office: MRO Winter 7Q10: 0.90
Requestor: NA Average flow: 5
Date of Request: NA 30Q2:
Quad: E15SE
RECOMMENDED EFFLUENT LIMITS
Weekly Daily
Avg Max
Cyanide (ug/1): 5 15
Cadmium (ug/1) :- i 2 5.3
Lead (ug/l) 26 36
Chromium (ug/1): 52 208
Nickel (ug/1) : 93 372
Upstream (Y/N): Y
Downstream (Y/N): Y
MONITORING
Location:
Location:
COMMENTS
MAR 16 1990
PERMITS & ENGINEFRING
These are changes requested by facility.
Effluent monitoring for the five limited metals is required
Monday through Friday. If Monday's sample meets the weekly average
limit, then no more analyses are required for the week. If Monday's
sample exceeds the weekly average, then samples must be analyzed
for all days, and the weekly average and daily maximum limits must
be met.
The weekly average limits reflect the current daily max limits except
for nickel which is based on the new water quality standard.
Recommended by: 2ud;C C. ale_ Date: ,cal,,WD/ci0
Reviewed by I ,
Tech Support Supervisor: _ Date:
Regional Supervisor: '" LI,.� �)v Jyl Date:
Permits & Engineering: 'l1 . ' _ Date: 30cI C)
RETURN TO TECHNICAL SERVICES BY: MAR 2 3 1990

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Dept. of Environment,
Health, and Natural
Resources
ATTN: Don 8afrit
P.O.Box 27687
Raleigh, N.C. 27611
Feb. 14, 1990
Subject: Request for
modifications
of permit #
Dear Mr. Safi -it
As per our phone conversation I would like to request
a modification of our existing NPDE8 permit.
Our current permit requires weekly analyses of Cyanide,
Cadmium, Lead, Chromium, and Nickel.
The following are current daily maximum limits on these
parameters.
Cyanide --- 5 ug/l
Cadmium --- 2 ug/l _
Lead 26 ug/l
Chromium - 52 ug/l
Nickel --- 53 ug/1
I would like to request that these limits be listed as weekly
average limits, and that the daily maximum limits be set on
the no -acute toxicity system.
With the above changes I feel we could better monitor our
discharge limitations.
I feel by analyzing one sample per week we could meet the new
limits, but if we should exceed the daily maximum we would
have the flexibility of additional analyses.
Since we already preserve samples daily for metals and
Cyanide analysis our operation would stay the same.
Enclosed is our permit modification fee of $25.00.
I would like to thank you and Mr. Clements for all of your
help in this matter.
CC: Trevor Clements
Sincerely
,Mike Lamberth -
uperintendent
Rocky River WWTP
P.O.Box 878
Mooresville,NC
28115
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