NC0034703_Wasteload Allocation_19910604

NPDES DOCUHENT SCANNING COVER SHEET
NPDES Permit:
NC0034703
Knollwood Elementary School WWTP
Document Type:
Permit Issuance
Wasteload Allocations
Authorization to Construct (AtC)
Permit Modification
Speculative Limits
Complete File - Historical
Instream Assessment (67B)
Environmental
Assessment (EA)
Permit
History
Document Date:
June 4, 1991
Thies document is printed on reuse paper - ignore arty
content on the reYerse aide

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0034703
PERMITTEE NAME: Rowan -Salisbury Board of Education /
Facility Status: Existing
Permit Status: Renewal
141A.ok Wop
E ,sry� c 1
Major Minor
Pipe No.: 001
Design Capacity: 0.011 MGD
Domestic (% of Flow): 100 %
Industrial (% of Flow):
Comments:
RECEIVING STREAM: Little Creek
Class: C
Sub -Basin: 03-07-04
Reference USGS Quad: E16SE
County: Rowan
Regional Office: Mooresville Regional Office
Previous Exp. Date: 11/30/91 Treatment Plant Class: 1
Classification changes within three miles:
No change within three miles.
Requested by:
Prepared by: A,,,,,, ,. / Ot - Date: 5 3
Reviewed by:
Mack Wiggins
(please attach)
Date: 4/17/91
11 8 (.$)/,3; (w)
Date: In ffi l
Modeler
Date Rec.
#
SAO
II\tA(gt
Wig
Drainage Area (mil ) 7.49 Avg. Streamflow (cfs): g. c)
7Q10 (cfs) 0 .( Winter 7Q10 (cfs) t.4 30Q2 (cfs) (.5
ToxiciiLimits:IWC % Acute/Chronic
Instream Monitoring:
Parameters
Upstream Location
Downstream Location
Effluent
Characteristics
Summer
Winter
BOD5 (mg/1)
3v
30
NH3-N (mg/1)
28.4
No t.
D.O. (mg/1)
TSS (mg/1)
3,,
30
F. Col. (/100 ml)
20 0
Zo o
pH (SU)
fo _ 9
6 —
c
PLO
.
Comments: (At I.ITr cosE N (- -tJ IAn.I-r 3 Lieu oG Toxiciry
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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 ALLOCATIONS
:Knollwood Elementary School
:NC0034703
:100% Domestic
:Existing
:Renewal
:Little Creek
:C
:030704
:Rowan
: MRO U NA
:M. Wiggins
:4/17/91
:E16SE
Stream
USGS #
Request # 6197
°r N
CO,ii3f.RESO F:crS ANDS
RAL
+rrr 43Y,Evtz.oPAIENT
MIAY 1 71991
r ; ( / AMAGEMET
/4t! OFFICE�_
Characteristics:
iii3
0212089500 Date 86
Drainage Area: 7.49 sq.mi.
Summer 7Q10: 0.6 cfs
Winter 7Q10: 1.4 cfs
Average Flow: 8.0 cfs
30Q2: 1.8 cfs
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Facility is meeting its current limits. Minimal violations in the past
year.
Per ammonia toxicity policy, the Knollwood should have choice of whole
effluent toxicity testing or NH3-N limit.
FAw r� wl�� 4CPIVE 441-AS UE LE- TER .
-E0
i' AY 1991
ifs91T5 ..:7)iniKFRINa
Special Scheduled Requirementsiand additional comments from P viewers:
v:ver+� t Pir2c� 5 ( /Q),,„-J(c{ 4 �+e.
Ni�3- N �+`+,:�T 6e_ inco:sx.r. 4 :r+L> �ri�. per. - .
Recommended by:
Reviewed by
Instream Assessment:
Regional Supervisor:
Permits & Engineering:
(7ALA(4_
A
RETURN TO TECHNICAL SERVICES BY:
JUN 11 1991
Date : 5%9t/1 l
Date: `J—//G/C1
Date : Si 3g 1
Date : q7.4q,

Existing Limits
Wasteflow (MGD) :
BOD5 (mg/1) :
NH3N (mg/1) :
DO (mg/1):
TSS (mg/1) :
Fecal Coliform (/100 ml) :
pH (SU) :
Recommended Limits
**
Wasteflow (MGD) :
GODS (mg/1) :
NH3N (mg/1) :
DO (mg/1) :
CONVENTIONAL PARAMETERS
Monthly Average
Summer/Winter
0.011
30/30
30/30
1000/1000
Monthly Average
Summer/Winter
0.011
30/30
28.4 (summer only)
TSS (mg/1) : 30/30
Fecal Coliorm (/100 mi): 200/200
pH (SU) :
Toxicity: Chronic Qtrly P/F at 2.8%
**
Daily Maximum
6-9
Daily Maximum
6-9
** Facility should have choice between ammonia limit (summer) or whole
effluent toxicity testing year round.
INSTREAM MONITORING REQUIRMENTS:
Upstream: Location:
Donwstream: Location:
Limits Chances Due To: Parameter(s) Affected
Ammonia Toxicity
Standard update
NH3-N, toxicity
Fecal coli
(explanation of any modifications to past modeling analysis
includidng new flows, rates, field data, interacting discharges, etc.)

N Fr..
M G NotGG
10/8
Facility Name KNou.uuoop 6colggrAiLv Sci cot- Permit t NIGJO 1o3
CHRONIC TOXICITY TESTING REQUIREMENT (QRTRLY)
The effluent discharge shall at no time exhibit chronic toxicity in any two consecutive toxicity tests,
• using test pro - • ures 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 2. % (defined as treatment two in the North Carolina procedure
document). Pie permit holder shall perform quarter(v 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 Mai QucNov res . Effluent
sampling for his 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 sir ortin chemical/physical measurements
performed in•association with the toxicity tests, as well as all dose/response daa. Total residual
chlorine of the effluent toxicity,sample must be measured and reported if chlorine is employed for
disinfection 1. 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 roonitoting 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 cfs
Permited Flow !) • Oil MGD Recommended by:
IWC% .2•14
Basin & Sub-bsin 03o'041-
Receiving Stream Lrn
(�C� t�
County ,�,�
Date 519191
**Chronic Toxicity (Ceriodaphnia) P/F at $43%, Aye AurgolAB, Sec Part U Condition