NC0043125_Permit (Modification)_19990421

NPDES DOCUHENT !;CANNING COVER SHEET
NPDES Permit:
NC0043125
The Patterson School WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File
- Historical
Engineering Alternatives (EAA)
Correspondence
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Permit
History
Document Date:
April 21, 1999
Thine doc■im iit is printed cork reuse paper - ignore any
content on the reirerse side

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Govemor
Wayne McDevitt, Secretary
Kerr T. Stevens, Director
April 21, 1999
Mr. W. J. Hogan
The Patterson School
Post Office Box 500
Patterson, North Carolina 28661
NCDENR
Subject: NPDES Permit Modification
Permit No. NC0043125
The Patterson School
Caldwell County
Dear Mr. Hogan:
On March 11, 1999, the Division of Water Quality issued NPDES Permit No. NC0043125 to The
Patterson School. We have received your letter on April 1, 1999 requesting modifications of the monitoring
frequencies for BODS, TSS and ammonia. Accordingly, we are forwarding herewith modifications to the
subject permit.
After a review of the facility's effluent data for BOD5, TSS, and ammonia for the past year, the
Division has re-evaluated the monitoring frequencies. The revised frequencies are as follows:
• The monitoring frequency for ammonia will be monthly instead of 2/month. Since there is no
ammonia limit and the monthly values for the past year averaged less than 9 mg/1, the decision was
made that once per month monitoring would be sufficient.
• The monitoring frequency of BODS and TSS will remain weekly as recommended in the renewed
permit. A review of the BODS data showed that while there were no violations of the 30 mg/1 limit,
the reported values from May 1998 through November 1998 ranged from 26.5 mg/1 to 29.0 mg/l.
These values indicate some problems with treatment. There was a violation of the TSS limit of
34.5 mg/1 in August 1998, with values ranging from 24.9 mg/1 to 28.5 mg/1 in July through
November 1998. The higher values in the summer months indicate some treatment problems and
weekly monitoring of BOD5 and TSS appears to be appropriate. If these issues are corrected,
upon your written request, the Division will reevaluate the monitoring frequencies after twelve
months of data has been collected.
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]/FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

Please find enclosed one amended effluent sheet. The monitoring frequency for BODS and TSS
will remain weekly based on Division procedures. The monitoring frequency of ammonia will be monthly.
All other terms and conditions contained in the original permit remain unchanged and in full effect. These
permit modifications are issued pursuant to the requirements of North Carolina General Statutes 143-215.1
and the Memorandum of Agreement between North Carolina and the U. S. Environmental Protection
Agency.
If you have any questions or need additional information, please contact Jacquelyn M. Nowell,
telephone number [phone], extension 512.
Sincerely,
cc: .Central Files
Asheville Regional Office, Water Quality
NPDES Unit, Permit File
Point Source Compliance/Enforcement Unit
Training and Certification Unit (Attn: Dwight Lancaster)

Permit No. NC0043125
A (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
periodbeginning
During the be innin on the effective date of this permit and lasting until expiration, the Permittee is authorized to discharge from outfall
serial number 001. Such discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT CHARACTERISTICS
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly Average
Daily Maximum
Measurement
Frequency
Sample Type
Sample
Location1
Flow
0.025 MGD
Weekly
Instantaneous
I or E
BOD5, 20° C
30.0 mg/L
45.0 mg/L
Weekly
Grab
Total Suspended Solids
30.0 mg/L
45.0 mg/L
Weekly
Grab
NH3-N, mg/L
Monthly
Grab
pH2
Weekly
Grab
Temperature
Weekly
Grab
Notes:
1. Sample Locations: E - Effluent, I — Influent
2. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

404,71
NCDENR
JAMES B. HUNT JR.
GOVERNOR
WAYNE MCDEVITT
SECRETARY
A. PRESTON HOWARD,JR.,
P.E., DIRECTOR
MEMORANDUM
TO:
THROUGH:
FROM:
SUBJECT:
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
ASHEVILLE REGIONAL OFFICE
WATER QUALITY SECTION
April 7, 1999
Jackie Nowell
NPDES Unit
Forrest Westal
Jim R
Follow-up
Patterson School
Modification of Monitoring Schedule
NPDES Permit NC0043125
Caldwell County
This memo is in response to your request for additional
information concerning Patterson School's somewhat elevated
BOD and TSS results during 1998. The School had extremely
low flows during 1998 due to start-up enrollment. Those low
flows are believed to have been responsible for the
phenomena which you observed when you researched Patterson
School's self -monitoring data.
The low flows combined with 1998's warm and dry conditions
resulted in excessive growth of algae in Patterson School's
secondary clarifier. The liquid in the clarifier was clear
and green (with algae) when I inspected on June 4, 1998. As
the summer progressed, the algae problem grew until a
monthly average effluent TSS of 34.6 mg/1 occurred in
August, 1998. In addition to the TSS, algae elevates BOD as
a result of its dying and consuming oxygen during the
analysis.
Low flows exacerbate the growth of algae in the treatment
plant. The plant's actual flows are believed to be lower
than those reported on the facility's self -monitoring
reports. The operator often checks the treatment plant and
measures flow at times of peak volume. When I inspected in
June, 1998, the flow was a trickle (stream was the size of a
pencil lead).
INTERCHANGE BUILDING, 59 WOODFIN PLACE, ASHEVILLE, NC 28801-2414
PHONE [phone] FAX [phone]
AN EQUAL OPPORTUNITY / AFFIRMATIVE ACTION EMPLOYER - 50% RECYCLED/10% POST -CONSUMER PAPER

Jackie Nowell
Page 2
April 7, 1999
When colder weather arrived, Patterson School's BOD and TSS
concentrations declined appreciably. See attached results
for December, 1998 through February, 1999.
Since Patterson School's flow is low and since the somewhat
elevated BOD and TSS concentrations during 1998's warmer
months were attributable to algae caused by the low flows,
reducing Patterson School's proposed monitoring will in no
way compromise DWQ's ability to track the facility's
performance. Should the reduced monitoring schedule present
any problems, DWQ could always increase it at any time.
Your cooperation in this matter is sincerely appreciated.
Please contact me if there is a need for additional
information.

0F83650I SESSION READY FOR INPUTGKEX78/1vlY
COMPLIANCE EVALUATION ANALYSIS REPORT
PERMIT--NC0043 125 PIPE--001 REPORT PERIOD: 9801 -9812 LOC---E
FACILITY--PATTERSON SCHOOL DESIGN FLOW-- .0250 CLASS--1
LOCATION--LENOIR REGION/CGIJNTV--0 i CALDWELL
50050 00310 00530 00610
MONTH Q/IvI D BOG RES/TSS NH3++-NH4-
98/01 .0040 17.50 14.9 8.00
98/02 .0040 14.80 12.5 17.60
98/03 .0043 13.50 21.3 6.80
98/04 .0040 15.00 21.8 9.00
98/05 .0040 27.20 14.8 8.00
98/06 .0040 27.00 21.5 8.15
98/07 .0030 11.20 24.9 LESSTHAN
98/08 .0010 26.50 34.6E 8.65
98/09 .0040 27.20 27.5 16.30
98/10 .0026 29.00 20.0 12.90
98/11 .0042 26.80 28.5 8.60
98/12 .0045 12.20 19.8 LESSTHAN
AVERAGE .0036 20.65 21.8 10.40
MAXIMUM .0045 29.00 34.6 17.60
MINIMUM .0010 11.20 12.5 LESSTHAN
UNIT MGD MG/L MG/L MG/L

1KEX78/MY 04/07/1999
COMPLIANCE EVALUATION ANALYSIS REPORT
PERMIT--NC0043125 PIPE--001 REPORT PERIOD: 9901 -9903 LOC---E
FACILITY--PATTERSON SCHOOL DESIGN FLOW-- .0250 CLASS--1
LOCATION--LENOIR REGION/COUNTY--01 CALDWELL
50050 00310 00530 00610
MONTH Q/MGD BOD RES/TSS NH3+NH4 -
99/01 .0030 10.70 19.2 1.36
99/02 .0050 11.10 11.6 6.70
AVERAGE .0040 '10.90 '15.4 4.03
MAXIMUM .0050 1 1 . '10 19.2 6.70
MINIMUM .0030 10.70 11.6 1.36
UNIT 1vIGD MG/L MG/L MG/L

A721,
��
NCDENR
JAMES B. HUNTJR.
GOVERNOR
WAYNE MCDEVITT
SECRETARY
A. PRESTON HOWARD,J R.,
P.E., DIRECTOR
MEMORANDUM
TO:
THROUGH:
FROM:
SUBJECT:
NORTH CAROLINA DEPARTMENT OF'
ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
ASHEVILLE REGIONAL OFFICE
WATER QUALITY SECTION
April 1, 1999
Jackie Nowell
NPDES Unit
Forrest Westall
Jim R
Patterson School
Modification of Monitoring Schedule
NPDES Permit NC0043125
Caldwell County
As discussed in our telephone conversations, please find
attached the Patterson School's request for a change in the
NPDES monitoring schedule which is to become effective May
1, 1999. In accordance with the 30-day objection period
outlined in the cover letter for the permit, the School
requests that they be allowed to continue with twice per
month monitoring for BOD/TSS and monthly monitoring for
ammonia (versus proposed weekly monitoring for BOD/TSS and
2/month for ammonia).
Regional staff support the School's request to reduce the
proposed monitoring schedule for the following reasons:
* Since the current owners have assumed control of
School, operation of the treatment system has been
exceptionally good.
* As a result of the School being in start-up (small
enrollment), waste flow is extremely low, and the
dilution in the receiving stream is relatively large.
The montly average discharge (DMRs 98/02 -
99/01) is 3500 gallons per day (versus a limit of
25,000 gpd). There was only a trickle of flow during
DWQ's two previous inspections. The summer 7Q10 (cfs)
in the receiving stream is 13.
Due to the School's exceptionally good operational program,
INTERCHANGE BUILDING, 59 WOODFIN PLACE, ASHEVILLE, NC 28801-2414
PHONE [phone] FAX [phone]
AN EQUAL OPPORTUNITY /AFFIRMATIVE ACTION EMPLOYER - 50% RECYCLED/10% POST -CONSUMER PAPER

Jackie Nowell
Page 2
April 1, 1999
cooperation with the regional office, their low potential to
adversely impact the receiving stream, and the need to
conserve money, regional staff recommend that DWQ only
require twice monthly monitoring for BOD/TSS and monthly
ammonia monitoring in the permit which will be effective May
1, 1999 through October 31, 2003.
If the enrollment increases substantially or any other
material factor changes (such as the level of operational
attention), DWQ can at any time increase Patterson School's
monitoring frequencies.
Your assistance with this matter is appreciated. Please
contact me at 828-251-6208 if there are questions or a need
for additional information.

THE PATTERSON SCHOOL, INc.
Post Office Box 500 • Patterson, North Carolina 28661
828-758-2374 • 1-800-653-2760 • FAX [phone]
Vist Us At: www.pattersonschool.org
A Christian Co -Educational College Preparatory Boarding and Day School
March 29, 1999.
Mr. Kerr T. Stevens, Director
Division of Water Quality, NCDENR
P. 0. Box 29535
Raleigh, NC 27626-0535
Dear Mr. Stevens:
APR 1 1999
01
DIRECTOR'S OFFICE
Re: NPDES Permit # NC0043125
renewal effective May 1,
for Patterson School.
I recently received the final draft of our discharge permit which is to
become effective May 1. I would like to request two changes.
First, the permit was mailed to our old address, which is still good, but
could lead to trouble in the future. We are on the county -wide Enhanced
911 system, and our physical address is now 4646 Patterson School Drive,
Lenoir, NC 28645.
0ur routine mail address is Patterson School, P. 0. Box 500, Patterson,
NC 28661. This would be the best for future correspondance.
Second, I would like to stay on the sampling schedule as in the old permit
still in effect, as to BOD, TSS, and NH3. The old schedule was twice per
month for BCD and TSS, and once per month for NH3. The schedule in the
new (effective May 1) permit doubles this rate of sampling, which would
double our costs.
A group of us bought this facility in 1994 after the Church closed it.
We believe very much in the need for and the mission of this school, and
we took a financial risk in the purchasing and re -opening of it. It has
been difficult, but we are making progress. Enrollment increases each year,
but is not yet enough for us to operate with a surplus. The school is a
not -for -profit corporation. We must be very careful to control our costs.
I became ORC of our treatment plant in 1996, and have a Class II certificate.
I have_worl d to understand the plant's operation with Mr. Jim Reid with the
Asheville Regional•0ffice, and I believe that I can provide good management
of it in the future. Test results have been very good for the past six
months, and I do not think the environment would suffer if we continued to
test at the same rate as in the old permit still in effect through April.
Therefore I request that our new permit show a frequency of twice per month
for BOD and TSS, and once monthly for NH3.
Respectfully,
W. J. Hogan, ORC
Patterson School Board Member
PAA
APR 1 1999
WAFER QuAury
SECTION
The Patterson School does not discriminate on the basis of sex, race, ethnic origin, disability, or religion.

GKEX88/MP
COMPLIANCE EVALUATION ANALYSIS REPORT
04/06/1999
PAGE 1
PERMIT--NC0043125 PIPE--001
FACILITY--PATTERSON SCHOOL
LOCATION--LENOIR
REPORT PERIOD: 9803-9902 LOC---E
DESIGN FLOW-- .0250 CLASS--1
REGION/COUNTY--01 CALDWELL
50050 00310 00530 00610
MONTH Q/MGD BOD RES/TSS NH3+NH4-
LIMIT F .0250 F 30.00 F 30.0 NOL NOL 9.0 6.0
98/03 .0043 13.50 21.3 6.80 12.70 6.9-6.7
00010 00400
TEMP PH
98/04 .0040 15.00 21.8 9.00 19.50 6.8-6.7
98/05 .0040 27. 0 14.8 8.00 18.00 7.4-7.3
98/06 .0040 27.00) 21.5 8.15 20.00 7.2-7.1
98/07 .0030 11.20 24.9 LESSTHAN 22.20 7.4-7.2
98/08 .0010 26.50 34.6F 8.65 22.20 7.6-7.4
98/09 .0040 27.2 27.5 16.30 21.00 7.4-7.1
98/10 .0026 29.00 20.0 12.90 18.00 7.8-7.1
98/11 .0042 26.8 28.5 8.60 16.00 7.4-7.1
98/12 .0045 12.20 19.8 LESSTHAN 14.50 7.3-7.3
99/01 .0030 10.70 19.2 1.36 10.00 7.2-7.1
99/02 .0050 11.10 11.6 6.70 12.00 7.2-7.0
AVERAGE .0036 19.78 22.1 8.64 17.17
MAXIMUM .0050 29.00 34.6 16.30 22.20 /.800
MINIMUM .0010 10.70 11.6 LESSTHAN 10.00 6.700
UNIT MGD MG/L MG/L MG/L DEG.0 SU
ups, 1
l 2/9 8 - / 3l/ 7 4t-b
- 08/ 27,24 /.(0 627,d AVt,) yY8(z6,
( 27, 2) 4/?(fl'o) 6(7e (26, ° t)
f27
5 a/(2JL), z7R g(g,/y&)
0
it q/Y8
rigliv 1 zP4�
1d / Q
74241 *44-, Iff-m/A-- 6,onf 13,5 -
Aia C7r- G
(,)

The Patterson School
NC0043125
Limits
BOD
30/45
TSS Ave mth flow
30/45 0.025
May-99
10.5
10.7
0.0045
20.5
5.3
11
21.3
28.5
10.7
Jun-99
27.5
4.3
0.003
28
38.4
6
4.3
2.7
3
4
12
Jul-99
11
12
0.0047
4.1
18.7
2.9
12.4
12
17.6
Aug-99
10.5
16
0.005
14.5
28
<2
41
<2
24
.
4.1
26
Sep-99
2.4
15.5
0.00625
18
28
28.5
19.4
27
30.7
Oct-99
6.3
11.3
0.005
3.6
11.3
<2
10.7
3.1
12.7
Nov-99
5.3
17
, 0.007
5
29.3
,
2.2
14.7
2.2
5.7
6.4
15.3
Dec-99
3.4
10
0.0037
4.3
4
4.5
8.7
5.2
18.3
BOD TSS Ave mth flow
30/45
30/45 0.025
Jan-00
6.5
13.7
0.00475
5.4
9.7
4.7
9.3
6.6
15
Feb-00
2.1
3.7
0.006
5.6
11.3
3.2
5
6.5
18.3
Mar-00
2.1
2.3
0.0058
3
4.7
6.4
2.7
3.6
5.7
3.1
2.7
Apr-00
2.2
2
0.005
<2
2
2.7
2.7
3
3
May-00
3.5
4.3
0.001
17.5
19
15.5
15
11.5
6.3
6.4
5
Jun-00
3.2
6.3
0.001
<2
3.7
3.6
7
2.5
5
JuI-00
3
12.7
0.001
3.4
8
2.2
25.6
2.5
12.7
Aug-00
19.5
21
0.0012
<2
17
4.8
27.3
2.2
26
2.5
9.5
Sep-00
3.5
17.6
0.0045
11.5
11.5
4.9
9.7
3.4
11.7
,

REASONABLE POTENTIAL ANALYSIS i
i
1 j
,
Pr!pared by: Teresa Rodriguez, 01/09/01
, !
j
Name =JThe Patterson School
Parameter=
BOD
I
Parameter=
TSS
__Facility
NPDES # =
NC0043125
Standard =
mg/i
Standard =
mgli ;
Qw (MGD) =
0.025
Dataset=
DMR 10/99-9/00
Dataset=
DMR 10/99-9/00
Qw (cfs) =
0.03868
7010s (cfs)=
13
Modified Data
Nondetects
RESULTS
Modified Data
Nondetects
RESULTS
/WC (%) =
0.30
6.5
Std Dev.
4.355
13.7
Std Dev.
7.129'
5.4
Mean
5.046
9.7
Mean ,
10.146
_
r
Chronic CCC w/s7Q10 dil.
Acute CMC w/no dil.
Frequency of Detection
4.7
C.V.
0.863
9.3
C.V.
�.
0.7031
Parameter
FINAL RESULTS, mg/l
FINAL RESULTS, mg/l
#Samples
# Detects
6.6
Sample#
39.000
15
Sample#
39.000,
BOD
2.1
3.7
Max. Pred Cw
46.2
5.6
Mult Factor =
2.370
11.3
Mult Factor =
2.008
Allowable Daily Cw
45.0
360
39
36
3.2
Max. Value
19.500
mg/l
5
Max. Value
Max. Pred Cw
27.3001mg/l
TSS
6.5
Max. Pred Cw
46.215
mg/I
18.3
54.818_1n/I
45.000i mg/I
Max. Pred Cw
54.8
2.1
Allowable Cw
45.000
mg/I
2.3
Allowable Cw .
Allowable Daily Cw
45.0
15
39
39
3
4.7
-- -
•
_
6.4'--------
2.7
•
-
3.6,
5.7,
3.1'
2.7I
2.2
2
2.7
2*
3
2.7
3.5
3
17.5
4.3
15.5
19
11.5
15
6.4
6.3
3.2
5
3.6
6.3
2.5
3.7
1
.
-
3
7
3.4
5:
-
2.2
12.7,
2.5
8
19.5
25.6'
4.8
12.7
2.2
21
2.5
17
3.5
27.3
11.5
26
4.9
9.5
3.4
17.6
1<2
11.5
1
<2
9.7
1
<2
11.7

i
Facility Name =
The Patterson School
Monthly Average values
Parameter =
BOD
;
Parameter =
TSS
NPDES # =
NC0043125
!
Standard =
mg/l
Standard =
mg/l
Ow (MGD) =
0.025
Dataset=
DMR 10/99-9/00
Dataset=
DMR 10/99-9/00
Ow (cfs) =
0.03868
5.1601
7Q10s (cfs)=
13
Modified Data
Nondetects
RESULTS
Modified Data
Nondetects
RESULTS
1WC (%) =
0.30
3.8
Std Dev.
2.287
11.5
Std Dev. 1
4.2
Mean
4.690
16.4
Mean '
10.708'
0.482:
Chronic CCC w/s7Q10 dil.
Acute CMC w/no dil.
Frequency of Detection
4.3
C.V.
0.488
10.2
C.V.
Parameter
FINAL RESULTS, mg/l
FINAL RESULTS, mg/I
#Samples
# Detects
5.8
Sample#
12.000
11.9
Sample#
12.00_01
BOD
4.3
9.6
Max. Pred Cw
26.6
3.6
Mult Factor =
1 2.440
3.6
Mult Factor =
2.410
Allowable Cw*
30.0
360
12
12
2.28
Max. Value
10.900
mg/
2.4
Max. Value ,
20.200.mg/1
48.682. mg/I
30.000 mg/1
TSS
10.9
Max. Pred Cw
26.596
mg/
9.9
Max. Pred Cw
Max. Pred Cw
48.7
2.8
Allowable Cw
30.000
mg/
5.5
Allowable Cw
Allowable Cw`
30.0
15
12
12
2.8
14.7
_
5.8
20.2
1
Allowable Monthly Average
5.7
12.6
,