NC0046043_Wasteload Allocation_19910612

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NCO046043
PERMn7EE NAME: Oak Ridge Military Academy
Facility Status: Existing
Permit Status: Renewal
Major
Pipe No.: 001
Design Capacity:
_ Minor 1
0.04 MGD
Domestic (% of Flow):
Industrial (% of Flow):
Comments:
100 %
1
Refer : Basinwide / Streamline WLA File
Completed By Permits & Engineering
At Front Of Subbasin
RECEIVING STREAM: unnamed tributary to flAW gIV5g
Class: WS-III NSW
Sub -Basin: 03-06-01
Reference USGS C
County: Guilford
C 19 NW
(please attach)
Regional Office: Winston-Salem Regional Office
Previous Exp. Date: 8/31/91 Treatment Plant Class: II
Classification changes within three miles:
Requested by: _ Angela Y. Griffin
Prepared by:
Reviewed by:
won Ig 'f3.z
wQlsL_ W 4
Date: 2/20/91
Date: (11 / 9 )
Date:
I
Modeler
Date Rec.
#
kaT
u I -t
(ooTZ
Drainage Area (mil ) 0. 3S Avg. Streamflow (cfs): O• S/
7Q10 (cfs) 0 Winter 7Q10 (cfs) 0. 67 30Q2 (cfs) 0. b 7
Toxicity Limits: IWC % Acut Chronic
Instream Monitoring:
Parameters DO., Te^p rdndi fecal (�oG�or
Upstream ✓ Location below w_ 63 6d13t
Downstream V Location SR a 111
V
Effluent
Characteristics
Summer
Winter
BOD5 (m )
q
I g
NH3-N (mg/1)
I
3, fo
D.O. (mg/1)
(P
4e
TSS (mg/1)
30
30
F. Col. (/100 ml)
6700
a00
pH (SU)
6-q
G
AW4e (m 11)
LAAar;iar
&.511)\
m6ni'6"
vkawii'-ar
r-T
w1611, -Drno
vtnon �a r
Comments: --)(- V-60127Y 144S CMOICE 45:27oe:S�i4,
e`(s77A/G A-mMON'A- elm i rs l34,, ) 6.'ITH Tov.
bN� q?�_L "40 C(Mt75 (1 /3,G)
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Raw r 697.i'iaw
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FACT SHEET FOR WASTELOAD ALLOCATIONS
Request # 6072
Facility Name
:Oak Ridge Military
Academy RECEIVED
NPDES No.
:NC0046043
N.C. Dept. NRCD
Type of Waste
:Domestic
Facility Status
:Existing
IVI�`i 1 1°'�1 APR 2 2 1991
Permit Status
:Renewal
Receiving Stream
:UT to Haw River
Winston-SalemStream
Classification:WS-III NSW
Regional Office
Subbasin
:03-06-01
County
:Guilford
Stream Characteristics:
Regional Office
:Winston-Salem
USGS # 02.0932.4887 Date 1991
Requestor
:Angela Griffin
Drainage Area: 0.35 sq.mi.
Date of Request
:2/20/91
Summer 7Q10: 0 efs
Topo Quad
:C19NW
Winter 7Q10: 0.07 cfs
Average Flow: 0.4 cfs
30Q2: 0.07 cfs
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
School meets existing limits. The chlorine levels are too high.
Allowable chlorine for the stream is 17 ug/l. No summer
discharge. Instream data DOS look too high for summer. Facility may have
a CHOICE between the existing ammonia limits (3/6 mg/1) with quarterly
toxicity testing OR more stringent limits (1/3.6 mg/1).
- - .. - - - -
1 i •
sr
- •mil • � 4�
Recommended by: Date:
Reviewed by
Instream Assessment: W J S '_-) Jn Date: g q
Regional Supervisor: Date: %
Permits & Engineering: "T Date: S
MAY 10 1991
RETURN TO TECHNICAL SERVICES BY:

-2-
I
Existing Limits
Wasteflow (MGD) :
BOD5 (mg/1) :
NH3N (mg/1) :
DO (mg/1) :
TSS (mg/1) :
Fecal Coliform (/100 ml) :
PH (SU) :
TP (mg/ 1) :
TN (mg/1) :
Toxicity:
Recommended Limits
CONVENTIONAL PARAMETERS
Monthly Average
Summer/Winter
0.04
9/18
3/6
6
30
1000
6-9
monitor
monitor
none
Daily Maximum
60
Monthly Average
Summer/Winter
Wastef low (MGD) :
.04
BOD5 (mg/1) :
9/18
NH3N (mg/1):
1/3.6
DO (mg/1) :
6
TSS (mg/1) :
30
Fecal Coliform (/100 ml) :
200
PH (SU) :
6-9
Toxicity:
Chronic, quarterly at 99%
Chlorine (mg/1) :
monitor
TP (mg/1) :
monitor
TN (mg/1) :
monitor
* CHOICE, SEE Page 1.
INSTREAM MONITORING REQUIREMENTS: DO, TEMP, COND, FECAL COLIFORM
Upstream: Y Location: below NC 68 bridge
Downstream: Y Location:SR
2111
Limits Changes Due To:
Instream Data
Ammonia Toxicity
Chlorine
Nutrient Sensitive Waters
HQW
New 7Q10 flow data
Special Modeling Studies
New facility information
Parameter (s) Affected
NH3-N

6�CU/ fie, - �� . �Q�' a �t W aMVAo�
�J � OL
l.b/8 9
Facility Name La� M, t�afqd Pk hermit #( 6&-t NC
CHRONIC TOXICITY TESTING REQUIREMENT (QRTRLY)
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 .JL% (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 pernrnt during the months of JA.10 , "2 , 13 u.z.. v Effluent
sampling for this testing shall be performed at the NPDESpermitted final effluent discharge below
all treatment processes.
All toxicity Nesting results required as part of this permit condition will be entered on the Effluent
Discharge Monitoring Fora (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 doselresponse 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.
MOTE: Failure to achieve test conditions as specified in the cited document, such as minimum
control organism survival and appropriate environmenuil 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 d cfs
Permited Flow- _ do MGD
IWC% &0
Basin & Sub -basin 03 -06 -a/
Receiving Stream y4 H r, �&ee-
County r.�
Recommended by:
Date
"Chronic Toxicity (Ceriodaphnia) II/F at ._7n%% W__L jAU,L,6 , See fart f., Condition k.

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STREAM DATA
INSTREAM SELF -MONITORING DATA
MONTHLY AVERAGES
.Discharger: D41c �:d aciC
Receiving Stream: 61jF / hyQ`.,
Upstream Location: 6E-12—
DATE
Dec-91
Nov-91
Oct-91
Sep-91
Aug-91
Jul-.9j
Jun-91
May-91
Apr-91
Mar-91
Feb-91
Jan-91
Dec-90
Nov-90
Oct-90
Sep-90
Aug-90
Jul-90
Jun-90
May-90
Apr-90
Mar-90
Feb-90
Jan-90
Dec-89
Nov-89
Oct-89
Sep-89
Aug-89
Jul-89
Jun-89
May-89
Apr-89
Mar-8
Feb-8
Jan-8
Permit No. 10 C OC> y( d Y 3
Sub -basin: 43 -O 6, - O l
Downstream Location:
L� >,
I_ TEIVP D.O. COLD FECAL CO
M- D.O. COND.
--I
Page 1

State of North Carolina
Department of Environment, Health, and Natural Resources
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Governor April 9, 1991 George T. Everett, Ph.D.
William W. Cobey, Jr., Secretary Director
Col. Alfred M. Dillon, Vice President
Oak Ridge Military Academy
NC 150
Oak Ridge, NC 27310
Subject: Chlorine Toxicity
NPDES Permit No. NCO046043
Guilford County
Dear Col. Dillon:
Chlorine, a widely used wastewater disinfectant for the treatment of coliform
organisms, often remains instream in residual amounts that may prove to be toxic under
critical low stream flow conditions. In the last decade, EPA assessed the potential adverse
effects of chlorine to the aquatic environment and has taken steps to reduce the impacts
through the development of federal criteria. In 1986, EPA recommended that all states
have a chlorine standard by their next triennial review of water quality standards.
In revising its water quality standards in 1989, North Carolina developed an action
level for chlorine of 17 ug/l (freshwater classes only). In addition, the fecal coliform limit
was reduced from 1000 colonies/100 ml to 200 colonies/ 100 ml. Under a new DEM
procedure, dechlorination and chlorine limits are now recommended for all new or
expanding dischargers proposing the use of chlorine for effluent disinfection. The
Division is reviewing chlorine levels from all existing dischargers as part of their NPDES
permit renewal process.
Our records indicate that chlorine from your facility's effluent discharge is
considered toxic to the receiving stream under low flow conditions, i.e., the amount of
chlorine discharged causes a violation of the instream action level for chlorine (17 ug/1 for
chronic effects or 28 ug/1 for acute effects) under 7Q10 conditions. An acceptable level of
chlorine in your effluent is 17 ug/1 or 0.017 mg/l. Action should be taken to reduce the
effluent concentration of chlorine to an acceptable level. If this level is not feasible, you
should consider dechlorination or alternate methods of disinfection for your facility to
ensure that both chlorine and bacterial limits are met. In addition, if your facility plans to
undertake any phase of construction, dechlorination or alternate disinfection should be
included However, please note that an authorization to construct must be obtained from
this Division prior to any alteration to your treatment plant.
Pollution Prevention Pays
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]
An Equal Opportunity Aflnmative Action Employer

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The Division is currently reviewing its water quality regulations pertaining to
chlorine. In the future, effluent limits and/or dechlorination may be required of existing
facility's with chlorine problems. If the chlorine levels in your facility's effluent remain
unchanged, a chlorine limit or a whole effluent toxicity testing requirement may be added
to your permit limitations.
Please feel free to call Steve Mauney of the Division's Winston-Salem Regional
Office at [phone], if you have any questions or comments regarding this issue.
Sincerely,
Steve Tedder
Water Quality Section Chief
. •
SWT/eaj
cc: Winston-Salem Regional Office
Central Files
Pollution Prevention Pays
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

i V LU
cc: Permits and Engineering (NPDES) \"^R 4'r91
Technical Support Branch
Guilford County Emergency Management
Central Files ,wraT bo
WSRO t1
Date March 8,.1991.__.,- 1
Page l of 3
NPDES STAFF REPORT AND RECOMMENDATIONS
County Guilford
NPDES Permit No. NC0046043
PART I - GENERAL INFORMATION (Renewal)
1. Facility and Address:
Oak Ridge Military Academy's WWTP Mailing Address:
Colonel Alfred M. Dillion, Vice President - Student
Services/Commandant, Oak Ridge Military Academy, NC
150, Oak Ridge, N.C. 27310
2. Date of Investigation: November 7 and 8, 1990
3. Report Prepared by: Arthur R. Hagstrom, Environmental
Engineer, DEM, WSRO, WQ
4. Persons Contacted and Telephone Number:
Lieutenant Joan O. Hall, ORC and Chemistry Instructor
[phone]
5. Directions to Site: From the junction of NC150 and NC
68 go east on NC 150 approximately 1/4 mile to the
academy.
6. Discharge Point - Latitude: 360 10' 46"
Longitude: 700 59' 14"
Elevation: 865' +/-
Attach a USGS Map Extract and indicated treatment
plant site and discharge point on map.
USGS Quad No. C19NW
USGS Quad Name Summerfield, N.C.
7. Size (land available for expansion and upgrading):
Over-all site is approximately 87 acres. There is
adequate land for any upgrade.
8. Topography (relationship to flood plain included):
At the WWTP site an area has been graded for the in -
ground plant. The surrounding terrain slopes to the
north and east with slopes of 2 to 6%. Drainage
ditches have been cut to allow for storm drainage and
run-off.

March 8, 1991
NC0046043
Page 2 of 3
9. Location of nearest dwelling: Approximately 500 feet
west of the plant through wooded land.
10. Receiving stream or affected surface waters: Unnamed
tributary to the Haw River
a. Classification: WS-III-NSW
b. River Basin and Subbasin No.: Cape Fear; 03-06-01
C. Describe receiving stream features and pertinent
downstream uses: Stream flows through generally
rural and wooded areas and junctions with the Haw
River within one mile +/-.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. Type of wastewater: 100% Domestic
0% Industrial
a. Volume of Wastewater: 0.117MGD
b. Types and quantities of industrial wastewater:
Normal dormitory and school cleaners
C. Prevalent toxic constituents in wastewater:
Unknown
d. Pretreatment Program (POTWs only): N/A
in development approved
should be required not needed
2. Production rates (industrial discharges only) in
pounds: N/A
a. highest month in the last 12 months
b. highest year in last 5 years
3. Description of industrial process (for industries only)
and applicable CFR Part and Subpart: N/A
4. Type of treatment (specify whether proposed or
existing): The existing system consists of a package
40,000 GPD, Can -Tex, extended aeration WWTP, consisting
of a bar screen and comminutor, a diffused air aeration
basin, clarification, sludge return, chlorination and
contact tank, flow measuring device, blowers, gravity
discharge line to the receiving stream.

March 8, 1991
NCO046043
Page 3 of 3
5. Sludge handling and disposal scheme:
Contract pumping as needed to North Buffalo WWTP in
Greensboro.
6. Treatment plant classification: Class I
7. SIC Code(s) 8211
Wastewater Code(s) 11
PART III- - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction
Grants Funds (municipals only)? No
2. Special monitoring requests: None
3. Additional effluent limits requests: None
4. Other: This facility could use a sludge holding tank.
Maintenance and operation satisfactory and in
compliance per January 2, 1991, CEI.
PART IV - EVALUATION AND RECOMMENDATIONS
The WSRO recommends Permit renewal in accordance with
current DEM Policy.
Signature of report preparer
/,-A , /- - - ' -
Water Quality SubervisojF