NC0029602_Wasteload Allocation_19960507

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0029602
PERMITTEE NAME:
FACILITY NAME:
Yadkin County Board of Education
Forbush Elementary School
Facility Status: Existing
Permit Status: Modification
Major
Pipe No.: 001
Minor
Design Capacity: 0.006 MGD
Domestic (% of Flow):
Industrial (% of Flow):
100 %
Comments:
Currently under SOC. They want to keep the 6000 gpd flow that they
currently have. Once SOC expires. flow is to drop to 2500 gpd.
RECEIVING STREAM: Min Branch
Class: C
Sub -Basin: 03-07-02
Reference USGS Quad: C 17NW (please attach)
County: Yadkin
Regional Office: Winston-Salem Regional Office
Previous Exp. Date: 1/31/92 Treatment Plant Class: 1
Classification changes within three miles:
No change within three miles.
Requested by:
Mark McIntire Date: 3/19/96
Prepared by: 4
t/ 0/YithA019-4- Date: s
� $�' ' s) f /35 m;/4- (('
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Reviewed by:
6 9�
Date: ')
Modeler
Date Rec.
#
AP m
.(915�
g4Us-
Drainage Area (mil ) /, 0 Avg. Streamflow (cfs): /,
7Q10 (cfs) Q, / Winter 7Q10 (cfs) O, y 30Q2 (cfs)
Toxicity Limits: IWC % Acute/Chronic
Instream Monitoring:
Parameters
Upstream Location
Downstream Location
Effluent
Characteristics
Summer
Winter
BOD5 (mg/1)
3 O.. O
30. 0
NH3-N (mg/1)
', `
1y0/%/TOf
D.O. (mg/1)
Wan/6r
i?/laYIi7Gp7-
TSS (mg/1)
<% 0
, . o
F.Col. (/100m1)
/�Ov
jlc (.2
pH (SU)
C -'
As, u /i--)
F
28"
mom
fi%Omi i
Avg. hf
Comments:
PLOTTED

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FORBUSH ELEMENTARY SCHOOL
i YADKIN COUNTY BOARD OF EDUCATION).
YADKIN COUNTY
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NPDES PERMIT NO. NC0029602 ,
= LAT: -36° 07' 34"
'- LONG: 80° 29' 51"
USGS QUAD NO. C-17NW/C-17SW
USGS QUAD NAME. VIENNA/CLEMMONS
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State of North Carolina
Department of Environment,
Health and Natural Resources
Winston-Salem Regional Office
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
Leesha Fuller, Regional Manager
Mark D. McIntire
NPDES Group
Permits and Engineering
Mark:
Avf"7rA
DEEHNJF
DIVISION OF ENVIRONMENTAL
MANAGEMENT
On behalf of Yadkin Board of Education, John Phillips of Diehl and Phillips requested that
the Forbush Elementary NPDES permit #NC0029602 be modified. Yadkin County Schools
are under SOC WQ 90-34. The currently permitted flow for this system is 6000 GPD.
Under their SOC and new permit, the discharge point is to be relocated to Mill Branch (see
attached map) and the flow reduced to 2500 GPD. The modification requests that the flow at
the relocated discharge be increased to 6000 GPD. Since the school is growing, WSRO does
not object to the increased flow. Technical support will be better equipped to evaluate the
potential effects of increasing the waste load to the receiving stream. According to Mark
Matthews, ORC and Donald Hawks of Yadkin County Schools, Yadkin County Board of
Education is tentatively planning on installing a small package plant at Forbush Elementary
some time in the Spring of 1997.
Sincerely,
Danny Hockett
cc: Central Files
WSRO
585 Waughtown Street, Winston-Salem, North Carolina 27107-2241 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

DIEHL & PHILLIPS, P.A.
CONSULTING ENGINEERS
Telephone [phone]
Fax [phone]
WILLIAM C. DIEHL, P.E.
JOHN F. PHILLIPS, P.E.
219 East Chatham Street, Cary, North Carolina 27511
January 5, 1996
Mr. Mack Wiggins
Permits & Engineering
Division of Environmental Management
NC Dept Environment, Health and Natural Resources
P.O. Box 29535
Raleigh, NC 27626-0535
Re: NPDES Discharge Permit Modification
Forbush Elementary School, Yadkin County
NPDES Permit No. NC0029602 /V46ey,
Dear Mr. Wiggins:
On behalf of the Yadkin County Board of Education, we would like to
request a modification to the referenced discharge permit. The
current permit flow of 6,000 gpd is scheduled to be reduced to 2,500
gpd at the relocated discharge point. Due to recent growth
projections for the Forbush elementary school, we would like to
request the permit be modified to allow continuation of the 6,000 gpd,
discharge at the new discharge point.
Enclosed is a check in the amount of $ 400.00 for the permit
modification fee. Please contact us when the wasteload allocation ham
been completed, so that we may be aware of any limit changes due to
the increased flow.
co ,zz
Yours very truly,
Diehl & Phillips, P.A.
li,
hn F. Phillips, P.E.
cc: Mr. Donald Hawks
/A-

Facility Name:
NPDES No.:
Type of Waste:
Facility Status:
Permit Status:
Receiving Stream:
Stream Classification:
Subbasin:
County:
Regional Office:
Requester:
Date of Request:
Topo Quad:
FACT SHEET FOR WASTELOAD ALLOCATION
Forbush Elementary School
NC0029602
Domestic - 100%
Existing
Modification -expansion
Mill Branch
C
03-07-02
Yadkin
Winston-Salem
Mark McIntire
3/19/96
C17NW
Request# _ 'RCEIVED
N.C. Dept. of EHNii
APR 221996
w nston-s,n •l
Regional t1ir,;,3
Stream Characteristic:
USGS #
Date:
Drainage Area (mi2):
Summer 7Q10 (cfs):
Winter 7Q10 (cfs):
Average Flow (cfs):
30Q2 (cfs):
IWC (%):
flows from 1991
WLA
1.8
0.1 L
04 a
1.8.__..
0.5 -' c`'
8.5% ,�,,
Wasteload Allocation Summary `v
(approach taken, correspondence with region, EPA, etc.)
The facility, which currently discharges to a zero flow stream, is planning to relocate their
outfall from UT to Mill Branch to Mill Branch. The facility has been under an SOC since at least
1991. Per the SOC the facility is to reduce its flow to 0.0025 MGD upon relocating to Mil
Branch. Monthly average flows indicate that the facility could not meet the 0.0025 MGD flow
limit upon relocation. Mill Branch will provide more dilution than the current site, however the
recommended ammonia limit will still be difficult to meet with the existing treatment plant. The
ammonia limit is based on protection against instream toxicity. Level B model indicates that the
0.006 MGD discharge will have measurable but minor impact to the receiving stream. As a result
instream monitoring is not recommended.
Special Schedule Requirements and additional comments from Reviewers:
A I')Recommended by: 54.1 Gt. ,„,im/ /14
Reviewed by: C1(01 : c7.4.— CIAAF,11/10— Date: L/
Instream Assessment: Date:
i Regional Supervisor: • _ . «- Date:
Permits & Engineering: - Date: 5/‘/g(
RETURN TO TECHNICAL SUPPORT BY: 1 8 1996
-5 6
Gam'

2
CONVENTIONAL PARAMETERS
Existing Limits (on Mill Branch):
Monthly Average
Summer Winter
Wasteflow (MGD): 0.0025 0.0025
BOD5 (mg/1): 30.0 30.0
NH3N (mg/1): 21.1 monitor
TSS (mg/1): 30.0 30.0
Fecal Col. (/100 ml): 200 200
pH (SU): 6-9 6-9
Residual Chlorine (µg/1): monitor monitor
Temperature (C): monitor monitor
Recommended Limits (on Mill Branch):
Monthly Average
Summer Winter WQ or EL
Wasteflow (MGD): 0.006 0.006
BOD5 (mg/1): 30.0 30.0 EL
NH3N (mg/1): 9.4 monitor WQ
TSS (mg/1): 30.0 30.0 EL
Fecal Col. (/100 m1): 200 200
pH (SU): 6-9 6-9
Residual Chlorine (14/1): 28.0 28 EL
Temperature (C): monitor monitor
D.Q. (mg/L): monitor monitor
Limit changes due to:
Ammonia limit based on protection against instream toxicity. Chlorine limit recommended per
current SOP.
Parameter(s) are water quality limited. For some parameters, the available load capacity of
the immediate receiving water will be consur ed. This may affect future water quality based
effluent limitations for additional dischargers within this portion of the watershed.
OR
No parameters are water quality limited, but this discharge may affect future allocations.

3
INSTREAM MONITORING REQUIREMENTS
Upstream Location: N/A
Downstream Location: N/A
Parameters: N/A
Special instrearn monitoring locations or monitoring frequencies:
MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS
Adequacy of Existing Treatment
Has the facility demonstrated the ability to meet the proposed new limits with existing treatment
facilities? Yes No X
If no, which parameters cannot be met?
iestua\ C\
Would a "phasing in" of the new limits be appropriate? Yes No
If yes, please provide a schedule (and basis for that schedule) with the regional
office recommendations:
If no, why not?
whey ..r 11001 relocals Q4I` 6ha• e v ra►ales w)11 be
a o. r ,� lams Mak w.l\ a I\ow 16.1. •Gae 161 1t
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r:4 So bt 0.4140,
Special Instructions or Conditions
Wasteload sent to EPA? (Major) (Y or N)
(If yes, then attach updated evaluation of facility, including toxics spreadsheet, modeling analysis
if modeled at renewal, and description of how it fits into basinwide plan)
Additional Information attached? (Y or N) If yes, explain with attachments.

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Forbush Elementary School
Mill Branch
NC0029602
Residual Chlorine
7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (UG/L)
UPS BACKGROUND LEVEL (UG/L)
•IWC (%)
Allowable Concentration (ug/I)
Fecal Limit
Ratio of 11.75 :1
Ammonia as NH3
(summer)
0.1 S7Q10 (CFS) 0.1
0.006 DESIGN FLOW (MGD) 0.006
0.0093 DESIGN FLOW (CFS) 0.0093
17.0 STREAM STD (MG/L) 1.0
0 UPS BACKGROUND LEVEL (MG/L) 0.22
8.51 % IWC (%) 8.5 %
200 Allowable Concentration (mg/I) 9.39
NBOD (mgll) = 42.24
Ammonia as NH3
(winter)
W7Q10 (CFS)
20W100mI DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
0.41
0.006
0.0093
1.8
UPS BACKGROUND LEVEL (MG/L) 0.22
IWC (%) 2.2 %
Allowable Concentration (mgA) 71.46
NBOD (mg/I) = 321.55