NC0067148_Wasteload Allocation_19910708

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NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NCO067148
PERMITTEE NAME: McDowell County Board of Education / Nebo
Facility Status: Existing
Permit Status: Renewal
Major Minor �1
Pipe No.: 001
Design Capacity: 0.0075 MGD
Domestic (% of Flow): 100 %
Industrial (% of Flow):
Comments:
refer: Basinwide / Streamline WLA file
at front of subbasin
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RECEIVING STREAM: Shadrick Creek
Class: C
Sub -Basin: 03-08-30
Reference USGS Quad: E 11 NW (please attach)
County: McDowell
Regional Office: Asheville Regional Office
Previous Exp. Date: 11/30/91 Treatment Plant Class: 0
Classification changes within three miles:
Requested by: Angela Y. Griffin Date: 4/29/91
Prepared by: Date: -71
Reviewed by: _L �A i ,t, Date: 3
_Lea - S (,,)/ 1-7 5. 5, o) / I
7 � q /
Modeler
Date Rec.
#
3o g l
(aZ "1
Drainage Area (mi ) Q. S Avg. Streamflow (cfs): 0-6
7Q10 (cfs) p. 2 Winter 7Q10 (cfs)
Toxicity Limits: IWC %
Instream Monitoring:
O. Z 30Q2 (cfs)_ 0.4
Acute/Chronic
Parameters
Upstream Location
Downstream Location
Effluent
Characteristics
Summer
Winter
BOD5 (m )
30
30
NH3-N (mg/1)
( 4
Z9 .0
D.O. (mg/1)
TSS (mg/1)
3o
30
F. Col. (/100 ml)
Zoo
Z 00
pH (SU)Ll
E— A -T.
Comments: PEk A90. Pe4U Cr SHOULD HAVE RE0PEn1ER- CLAus6,
IF tog ,-n Wrixt CANNOT fie MET CQosSlBt'y To LJSIr(LT WHOLE
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FACT SHEET FOR WASTELOAD ALLOCATIONS
Facility Name
:Nebo Elementary School
NPDES No.
:NC0067148
Type of Waste
:100% Domestic
Facility Status
:Existing
Permit Status
:Renewal
Receiving Stream
:Shaddrick Creek
Stream Classification:C
Subbasin
:030830
County
:McDowell
Regional Office
:ARO
Requestor
:A. Griffin
Date of Request
:4/29/91
Topo Quad
:EllNW
Request # 6217
Stream Characteristics:
USGS # 0213857435 Date 186
Drainage Area: 0.50 sq.mi.
Summer 7Q10: 0.2 cfs
Winter 7Q10: 0.2 cfs
Average Flow: 0.6 cfs
30Q2: 0.4 ;cfs
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Nebo Elementary School currently discharges to Shaddrick Creek in (
McDowell Co. The facility has had several violations within the past year
(they have secondary limits): 3 BODS, 2 TSS and 2 Fecal coliform
violations. The reported ammonia values are very high.
Per current NH3-N toxicity policty, the facility should receive choice
between stringent NH3-N limit or toxicity test and existing NH3-N limit (no
limit).
Special Scheduled Requirements and additional comments from Reviewers:
i Va 1 t� 5 ,5hAw ueL'X j I i b ""Aj iljrznvrn((_fi pr" oes 4hv U'-4 �-- d+ '
C_ I IL I/ c C I A— ta.,... — I l A A. I' --A. ^ C n A r i N i -Ad .2 1 0 L7.
-c ,*4-' Y�a r 4t, 1 0-PA-O �'�rra// A" -%/emu 6-1,2-9/. T2/2-
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rs 1t�►- -, t C,ver AA -e;
t�>fF s Jv s f i'� lie �P. 9%s'-d:7 7.r
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Recommended by: ''kVj.A"_Date: �l `� ��� /i/A;-17t
Reviewed by -A, I
isInstream Assessm t:(�z Date: 5 a y � � d T
Regional S r: � " Date:
Permits & Engineering: Date: ;/rZ{t% `i..1- / E
:ss V F w ja
RECEIVE6'
JUN 2 2 1991 water Quality Section fi 0 3
/�l..
RETURN TO TECHNICAL SERVICES BY: gno �-0
MAY 2 939 y �.
Asheville Regional C Mks
rolirm
Asheville, North Carolina

Existincr Limits
Wasteflow (MGD):
BOD5 (mg/1) :
NH3N (mg/1):
DO (mg/1) :
TSS (mg/1):
Fecal Coliform (/100 ml):
PH (SU)
Recommended Limits
WM
CONVENTIONAL PARAMETERS
Monthly Average
Summer/Winter
0.0075
30/30
30/30
1000/1000
Daily Maximum
6-9
Monthly Average Daily Maximum
Summer/Winter
Wasteflow (MGD): 0.0075
BOD5 (mg/1): 30/30
** NH3N (mg/1): 14.4/29.0
DO (mg/1):
TSS (mg/1): 30/30
Fecal Coliform (/100 ml): 200/200
PH (SU) : 6-9
** Toxicity: Chronic Q P/F at_%
fAC,LIT`I 5NuuLP Hf)►lr, Cticam a TwcW N9-6 4 LtMrr OR QuA2TkXi-q ioxiecry TESTI.NIr.
INSTREAM MONITORING REQUIRMENTS: NONE
Upstream: Location:
Donwstream: Location:
Limits Chancres Due To:
Ammonia Toxicity
Parameter(s) Affected
NH3-N. toxicity
(explanation of any modifications to past modeling analysis
includidng new flows, rates, field data, interacting discharges, etc.)

10/89
Facility Nanic 004oiJfAe S'GKoot. i; &IC 0067148
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 ,S % (defined as treatment two in the North Carolina procedure
document). The permit holder shall perform quarte-rly monitoring using this procedure to establish
compliance with the permit condition. The. fast test will be performed after .Hurry days from
issuance of this permit -during the months of t&Ag. Au NoV, 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. GP3B. 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 clietnical/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 qu4aerly in the months specified above.
z
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.
MOTE: Failure to achieve test conditions as specified in the cited document, such as miniOlum
control organism survival and appropriate environmenutl 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 0.2- cfs
Permited Flow o. coZS MGD
IWC% - 6.40 .
Basin & Sub -basin rTj, 3o
Receiving Stream .!sdApDa t ppEje_
County M T0wzL_t_
Recommended by:
**Chronic Toxicity (Ceriodaphnia) P/Fat Sec

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