NC0034703_Wasteload Allocation_19930209

NPDES DOCUMENT SCANNING COVER SHEET
NPDES Permit:
NC0034703
Knollwood Elementary School WWTP
Document Type:
Permit Issuance
Allocatfr(Wasteload
�f.?':1`'R:'fCa-CiKrNii�l" .N-IKW-'ci _4ey S'.o;'1"a.
Authorization to Construct (AtC)
Permit Modification
Speculative Limits
Complete File
- Historical
Instream Assessment
(67B)
Environmental
Assessment (EA)
Permit
History
Document Date:
February 9, 1993
This document is printed on reumm paper - ignore any
content an the reYerise side

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0034703
PERMITTEE NAME: Rowan -Salisbury Board of Education
FACILITY NAME: Knollwood Elementary School
Facility Status: Existing
Permit Status: Renewal
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: 7/31/93 Treatment Plant Class: II
Classification changes within three miles:
No change within three miles.
Requested by:
Prepared by:
Reviewed by:
413 135
Greg Nizich"
(please attach)
Date:
11/13/92
Modeler
Date Rec.
#
5
t\\ IL,\ g.-
72-4o
2
Drainage Area (mi ) -7. Avg. Streamflow (cfs): S
7Q10 (cfs) D.
Winter 7Q10 (cfs) . g- 30Q2 (cfs)(. 8
Toxicity Limits: IWC
Instream Monitoring:
Parameters
Upstream Location
Downstream Location
% Acute/Chronic
Effluent
Characteristics
Summer
Winter
BOD5 (mg/1)
30
3 0
NH3-N (mg/1)
28 •9' —
14o"seree-
D.O. (mg/1)
TSS (mg/1)
3o --
3 0
F. Col. (/100 ml)
Z00 ,
?,off
PH (SU)
4 _ 9 ,
6 _9
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iketJrroR-
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Comments: Qugt1- .t_y-TP(T!`l mod! 1-42 /4 6ti1J !?
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FACT SHEET FOR WAS 1'ELOAD ALLOCATION
Facility Name:
NPDES No.:
Type of Waste:
Facility Status:
Permit Status:
Receiving Stream:
Stream Classification: C
Subbasin:
County:
Regional Office:
Requestor:
Date of Request:
Topo Quad:
Knollwood Elem. School
NC0034703
Domestic - 100%
Existing
Renewal
Little Creek
030704
Rowan
MRO (ltC
G. Nizich
11/13/92
E16SE
Request # 724D
KEPT. OF NATURAL
RESOURCES AND
tOMMtJNITY DEVELOPMENT
JANf 1 9 1993
DIVISION CF F?IVIRo !::'E T "r , • „I
MOORESVILLE RE:Saa
Stream Characteristic:
USGS #
Date:
Drainage Area (mi2): 7.49
Summer 7Q10 (cfs): 0.6
Winter 7Q10 (cfs): 1.4
Average Flow (cfs): 8.0
30Q2 (cfs): 1.8
IWC (%): 2.76
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Knollwood Elementary School has had 1 Fecal coliform violation in the past year.
No adverse comments are contained in the staff report.
The previous permit was issued 9/1/91. The permit is up for renewal due to the basin permitting
plan.
The facility had chosen the NH3-N limit in lieu of toxicity testing during the last permit renewal.
The facility should perform quarterly TP and TN monitoring due to its proximity to Grants Creek
and High Rock Lake.
Special Schedule Requirements and additional comments from Reviewers:
Recommended by:
Reviewed by
Instream Assessment:
Regional Supervisor:PP/" 6'
Permits & Engineering:
aiez,
2a vtCu/L.01s-r--)
Date: ,A0 (13—
Date: 07/9 3
Date: i/Z 0.7
Date: /
' '- d 1 2 IyyS
RETURN TO TECHNICAL SERVICES BY:

Existing Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Col! (/100 ml):
pH (SU):
Residual chlorine (4/1):
Oil & Grepase (mg/1):
TP (mg/1)i
TN (mg/1):
Recommended Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Col. (/100 ml):
pH (SU):
Residual Chlorine (14/1):
Oil & Grease (mg/1):
TP (mg4)
TN (mg/1:
Limits Changes Due To:
Change in 7Q10 data
Change in stream classification
Relocation of discharge
Change in wasteflow
Other (onsite toxicity study, interaction, etc.)
2
CONVENTIONAL PARAMETERS
Monthly Average
Summer Winter
0.011 0.011
30 30
28.4 monitor
30 30
200 200
6-9 6-9
Monthly Average
Summer Winter
0.011 0.011
30 30
28.4 monitor
30
200
6-9
30
200
6-9
monitor monitor
monitor monitor
WQ or EL
el
wq
qtrly
qtrly
Parameter(s) Affected
TP,TN monitoring -High
Rock Lake study
Instream data
New regulations/standards/procedures
New facility information
Parameter(s) are water quality limited. For some parameters, the available load capacity of
the immediate receiving water will be consumed. 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:
Downstream Location:
Parameters:
Special instream monitoring locations or monitoring frequencies:
MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS
Adequacy of Existing Treatment
Has the facility de strated the ability to meet the proposed new limits with existing treatment
facilities? Yes No
If no, which parameters cannot be met?
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?
Special Instructions or Conditions
Wasteload sent to EPA? (Major) _N (Y or N)
(If yes, then attach schematic, toxics spreadsheet, copy of model, or, if not modeled, then old
assumptions that were made, and description of how it fits into basinwide plan)
Additional Information attached? _N (Y or N) If yes, explain with attachments.

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RECO ED
DEC 101
t.
TECHNICAL SI PORT BRANCH -
PART
1.
2.
3.
4.
SOC PRIORITY PROJECT: Yes No X
If Yes, SOC No.
To: Permits and Engineering Unit
Water Quality Section
Attention: Greg Nizich
Date: December 7, 1992
NPDES STAFF REPORT AND RECOMMENDATION
County: Rowan
Permit No. NC0034703
I - GENERAL INFORMATION
Facility and Address:
Date
Knollwood Elementary School
Rowan -Salisbury Board of Education
Post Office Box 1348
Salisbury, North Carolina 28145
of Investigation: 12-04-92
Report Prepared By: G. T. Chen
Persons Contacted and Telephone Number: Mr. Mark Elmore,
Assi6tant Operator, Rowan County Schools Maintenance
Department; [phone]
5. Directions to Site: From the junction of Highway 29 and Shue
Road (SR 1506) in China Grove, Rowan County, travel north on
SR 1506 approximately 2.9 miles. The school is on left (west)
side of the road. However, the wastewater treatment plant is
located approximately 600 feet north of the school.
6. Discharge Point(s). List for all discharge points:
Latitude: 35° 37' 29" Longitude: 80° 34' 22"
Attach a U.S.G.S. map extract and indicate treatment facility
site and discharge point on map.
USGS Quad No.: E 16 SE USGS Name: China Grove, NC
7. Site size and expansion are consistent with application?
Yes
X No If No, explain:
8. Topography (relationship to flood plain included): Sloping
north toward SR 1503 (Grace Road) at the rate of 3 to 5 % . The
site is not in a flood plain.
9. Location of nearest dwelling: No dwellings within 500 feet of

the existing facility.
10. Receiving stream or affected surface waters: Little Creek
a. Classification: C
b. River Basin and Subbasin No.: Yadkin and 03-07-04
c. Describe receiving stream features and pertinent
downstream uses: The receiving stream is approximately
25 feet wide with clear water and strong flow.
Downstream users are not known.
PART
1. a.
.b:
c.
d.
II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
Volume of wastewater to be permitted: 0.011 MGD
(Ultimate Design Capacity)
What is the current permitted capacity of the wastewater
treatment facility? 0.011 MGD
Actual treatment capacity of the current facility
((current design capacity)? 0.011 MGD
Date(s) and construction activities allowed by previous
Authorizations to Construct issued in the previous two
years: N/A
e. Please provide a description of existing or substantially
constructed wastewater treatment facilities: The
existing facility consists of a bar screen, aeration
basin, clarifier, dosing tank, distribution box, six (6)
80 foot distribution pipes, surface sand filter and
tablet disinfection..
f.
g•
Please provide a description of proposed wastewater
treatment facilities: N/A
Possible toxic impacts to surface waters: None
h. Pretreatment Program (POTWs only): N/A
in development: approved:
should be required: not needed:
2. Residuals handling and utilization/disposal scheme:
a. If residuals are being land aPPlied. please specify DEM
permit no.:
Residuals Contractor:
Telephone No.:
NPDES Permit Staff Report
Version 10/92
Page 2

f
b.
Residuals stabilization:
c. Landfill:
PSRP:
PFRP:
Other:
d. Other disposal/utilization scheme (specify): Sludge is
removed periodically by a certified septage hauler and
transported to municipal facilities (in Salsibury) for
final disposal.
3. Treatment plant classification (attach completed rating
sheet): Class II, see attached rating sheet
4. SIC Code(s): 8211
of actual wastewater,
facilities, i.e., non -contact cooling water
metal plating company would be 14, not 56.
Primary: 03 Secondary:
Main Treatment Unit Code: 06007
Wastewater Code(s)
PART I I I
OTHER PERTINENT INFORMATION
not particular
discharge from a
1. Is this facility being constructed with Construction Grant
Funds or are any public monies involved (municipals only)?
N/A
2. Special monitoring or limitations (including toxicity)
requests: N/A
3. Important SOC, JOC or Compliance Schedule dates: (please
indicate) N/A
Date
Submission of Plans and Specifications
Begin Construction
Complete Construction
4. Alternative Analysis Evaluation: Has the facility evaluated
all of the non -discharge options available. Please provide
regional perspective for each option evaluated. N/A
Spra
Irrigation:
Connection to Regional Sewer System:
NPDES Permit Staff Report
Version 10/92
Page 3

Subsurface:
Other Disposal Options:
5. Other Special Items: N/A
PART IV -(EVALUATION AND RECOMMENDATIONS
It is recommended that the NPDES Discharge Permit be renewed
as requested.
Signature of eport Preparer
Water Quality R ionaSupervisor
/
Date
NPDES Permit Staff Report
Version 10/92
Page 4