NC0025305_Meeting Notes_19940111

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5580CENTERVIEW DRIVE- SUITE 100-BLADEN BLDG. • RALEIGH, NC 27606-3 9I• [phone] FAX:(919)85I-qj93
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06206EETING MINUTES �jk I
DATE: January 11, 1994
TIME: 1:30 p.m. - 4:00 p.m. "YI JJI �( rd ,(� ! 'll _
LOCATION: 2nd Floor Conference Room V1w
Administration Building . o Vol • Ck
UNC-CH Boiler Plant �y• �IN Ifs V`p
Chapel Hill, NC rIp f
ATTENDEES. Herb Paul UNC-CH
James T. Mergner UNC-CH 1
Bill Roach UNC-CH V 1"\L,( .M
Ray DuBose UNC-CH )�l I vl� 1Q7 � d
David Ray UNC-CH V"� i( t�6V`
Dave Goodrich DEM-WQ, P&E Ju f
Charles Alvarez DEM-WQ, P&E I�j
Joe Garceau G&O 1 �9
UNC stated that the meeting was being held as a followup to the 12-10-93 meeting
at NCDEM to discuss specific iron -producing flows, and to allow NCDEM to tour
the facilities. The University desires to finally come to some mutually
beneficial resolution regarding the boiler plant wastewater treatment system
effluent parameters.
The University provided an overview of the history of the boiler plant, and
presented a slide show to familiarize NCDEM with the basic operation of the
plant. The University boiler plant is a cogeneration facility which functions
primarily as a district heating and cooling source for the campus proper,
including the hospital and research facilities. In addition, the University
will provide similar services to the EPA facility which is currently under
construction. The main difference between a typical steam electric generating
facility and the UNC boiler plant is the approximately 35 miles of distribution
and condensate return piping associated with the heating and cooling functions
of the boiler plant. Approximately 85Z of the condensate returns to the boiler
plant for reuse.
The University stated that, after review of the criteria in the "EPA Effluent
Guidelines and Standards for Steam Electric Power Generating" (40 CFR 423), it
was their feeling that the University's boiler plant is different from a pure
steam electric generating facility, which is the basis for the guidelines.
NCDEM agreed that this is a different facility and indicated that they will
consider those differences as the effluent limits are established for the new
Permit. NCDEM understands that it can be difficult to meet the guidelines.
The University presented a table of wastewater streams at the plant, and two
Schematic Flow Diagrams (copies attached). The table includes a listing of the
wastewater sources, the University's interpretation of the type of flow in
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MANASSAS, VA • MECHANICSBURG, PA • ORLANDO, FL • RALEIGH, NC • ROCKVILLE, MD • TAMPA, FL • WALDORF, MD • WEST PALM BEACH, FL

GREENHORNE & O'MARA, INC.
MEETING MINUTES
UNC Boiler Plant
January 11, 1994
Page 2
conjunction with 40 CFR 423, the estimated iron contribution, and the average
daily flow form each source. Estimated iron contributions represent the
University's best ideas of what is happening, and is not based on testing.
Actual testing of sources to determine actual amounts could be provided. The
most significant contributor of iron to the wastewater stream is the Magnetic
Filter Backwash. The Magnetic Filter removes iron from the condensate return
prior to reuse in the boiler plant. All condensate return is directed through
the Magnetic Filter.
After reviewing the above information, a tour of the boiler plant and the
wastewater treatment plant was conducted. During the tour, G&0 noted that the
actual effluent discharge location has been relocated from the effluent metering
manhole to a point further downstream, where all stormwater and wastewater flows
combine before leaving the boiler plant property. G&0 suggested that the
University may want to consider monitoring effluent temperature at the new
discharge location. NCDEM agreed that temperature could be monitored at that
location, since it is on the boiler plant property, and NCDEM is only interested
in what goes into the stream.
NCDEM stated that they appreciated the tour. This is a complex facility with a
complex problem regarding iron. NCDEM wants to do their own review of the
wastewater characteristics to determine how much of the waste stream comes under
the regulations in 40 CFR 423. The University comes under Section 423.13, which
includes iron limits for metal cleaning wastes. Metal cleaning wastes are
defined in the guidelines. NCDEM's initial interpretation of the guidelines
suggests that iron limits apply only if metal. cleaning wastes, as defined in the
guidelines, contribute to the wastewater at the boiler plant. If the EPA,
NCDEM, and UNC are satisfied that no metal cleaning wastes exist at the boiler
plant, NCDEM will include only a monitoring requirement for iron in the new
NPDES Permit.
The University indicated their review of Section 423.10 suggests that district
heating and cooling, and the associated piping systems, are not typical of a
facility as stated in the guidelines. Based on the University's review of the
guidelines, there appears to be an opportunity to develop site specific criteria
for the boiler plant. NCDEM agreed, but felt that approaching EPA for site
specific criteria would be a very lengthy process.
NCDEM also has an option to include a mass limit for iron based on total
wastewater flow. NCDEM suggested that the University review past records to
determine the mass amount of iron discharged from the plant. Mass amounts of
iron are calculated based on the following formula:
mg/l x MGD x 8.34 = lb/day
Mass limits will be determined based on total permitted flow. Actual
concentrations are calculated based on actual flow at the time the sample is
taken.

GREENHORNE & O'MARA, INC.
MEETING MINUTES
UNC Boiler Plant
January 11, 1994
Page 3
NCDEM suggested that the University consider diverting additional low volume
flows to discharge to OWASA. The University stated that is possible; however,
they must consider the cost of treatment by OWASA. NCDEM also suggested that
the University proceed with sampling at the Magnetic Filter to determine actual
concentrations of iron. Alternate solutions for the top three iron -producing
flows should be considered by the University.
NCDEM cautioned that whatever option is determined to be the best solution for
resolution of the iron problem, the University should continue to be diligent in
working towards improving the effluent. Quarterly whole effluent toxicity
testing will be a requirement of the new Permit, and possibly under the SOC
extension. The University stated that they are already doing effluent toxicity
testing and have the next test scheduled for this month.
NCDEM asked the University to be available for clarification as they reviewed
the data provided at today's meeting. NCDEM hopes to resolve the Permit issues
quickly. The University agreed and stated they will be available as needed to
enable NCDEM to complete their review.
The meeting adjourned at approximately 4:00 pm.
JEG/kfh
Attachments

IRON SOURCES WASTE WATER EFFLUENT
Waste Water Source Type as defined Est. Iron Flow (GPD)
in EPA Guidlines Contribution Daily Ave.
ACID SIDE non treated
Cation Backwash
Low Volume Waste
Mod.
1,890
Cation Fast Rinse
Low Volume Waste
Mod.
2,986
Cation Service Rinse
Low Volume Waste
Mod.
900
Anion Backwash
Low Volume Waste
Mod.
285
Anion Fast Rinse
Low Volume Waste
Mod.
4,320
Anion Service Rinse
Low Volume Waste
Mod.
900.
Demin. Spent Re en.
Low Volume Waste
Mod.
7,400
Mixed Bed Backwash
Low Volume Waste
Mod.
213
Mixed Bed Fast Rinse
Low Volume Waste
Mod.
167
Mixed Bed Service Rinse
Low Volume Waste
Mod.
1,875
Mixed Bed Spent Re en.
Low Volume Waste
Mod.
3,040
CAUSTIC SIDE (treated)
Turbine Gland S2ray Cross
0
Vacuum Pum2 Seal Water
0
Turbine Gland Room "other"
Low Volume Waste
Low
1,512
Pump Seals
Low Volume Waste
Low
720
No. 5 Boiler
Blowdown
Mod. to High
2,880
Magnetic Filter Backwash
?
High
250
Ash Silo Washdown .
Bottom Ash
Mod. to High
2,400
Coal Unloalding Building Washdown
Low Volume Waste
Mod. to High
411
Demineralizer Conditioner Samples
Low Volume Waste
Low
5,760
Blowoff Tank Leaka a
Low Volume Waste
0
Miscellaneous Traps
Low Volume Waste
Low
720
Boiler Feed Pump Turbine Leakoff
Low Volume Waste
Low
0
Coal Pile Runoff
Coal Pile Runoff
Mod. to High
7,200
Low <0.25
Mod. 0.25 to 1.00
Mod to High 1.00 to 3.0
High >3.0
Page 1

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SITAT.0
o 9O,, CHARLFS WILLIAM ROACH, P.E.
IIpYp r
711 une-�n Building Systems Engineer
Ji,7D Earilitien Planning & Design Department
THE UNIVERSITY OF NORTH CAROLINA CHAPEL HILL
CBN 1090. Giles F. somry Bldg. Arco Code 919
Chapel Hill, N.C. 27599-1090 ��/ s/'�n�f( 962-0521
! /1
®580 ENHORNE & O'MARA, INC.
5560 CENTERVIEW DRIVE
SUITE 100 BLADEN BLDG.
RALEIGH, NC 27606-3389
Joseph E. Garceau, P.E.
Department Head - Civil Engineering
PHONE: [phone] FAX: [phone]
,�2 ux 4PQ LMEMERGNER, PEctor, Sperial Projects
S
THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL
Power Plant Annex Telephone
CBN 1840 [phone] (work)
Chapel Hill, N.C. 27599-1840 [phone] (home)
[phone] (fax)
nnSITAIjRAYMOND E. DUBOSE, P.E.
Power Plant Engineer
THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL
Physical Plant Department Telephone
CBN 18W. Paver Plant (919) %2-1167
Chapel Hill, N.C. 27599-1800
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Effluent Report Summary August - November 1993
Lq-
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H
August
Ave.
0.068
32
0.02
<.01
0.0578
1.318
<42
<36.6
0.062
Max.
0.25
3
9.16
0.03
0.01
0.167
3.72
190
0.16
Min.
0.03
29
6.21
0.01
<.01
0.016
0.386
• <5.0
#<4
0.019
September
Ave.
0.073
33.6
0.0175
<.01
0.119
0.917
<6.05
<14.3
0.064
Max.
0.2
8.78
0.03
<.01
0.186
1.1
7
32.5
0.117
Min.
0.03
28
6.36
0.01
<.01
0.01
0.316
<5.0
<4.0
0.027
October
Ave.
0.08
31.5
0.375
0.011
0.018
.927
5
22
0.06
Max.
0.12
40
9.4
0.04
0.013
0.034
1.91
5
34
0.158
Min.
0.04
25
3.3
0.02
0.01
0.01
0.355
5
4
0.01
November
Ave.
0.055
5.7
0.02
Max.
0.099
4.5
9.56
0.03
Min.
0.019
20.5
5.39
A.O1

PH EXCURSIONS FOR AUGUST
DATE
>1 HOUR
DURATION
MIN/MAX VALUE
DAILY TOTAL
811/93
YES
1:05
1
5.9
1:33
811/93
NO
028
5.0
812193
NO
0:08
5.9
1:07
8/2l93
NO
0:58
5.3
8/3/93
NO
029
5.6
029
8/4/93
NO
0:30
9.3
0:43
8I4/93
NO
0:13
9.8
8/5/93
NO
0:07
5.9
023
8/5/93
NO
0:16
5.8
8/7193
NO
0:16
5.9
817/93
NO
0:50
5.9
1:35
817193
NO
029
9.4
8/8/93
NO
0:33
3.9
0:33
8/11193
NO
0:06
5.8
021
8/11/93
NO
0:15
9.7
8/13/93
NO
0:30
9.9
8/13/93
NO
0:40
9.4
1:18
8/13/93
NO
0:07
9.4
8/15/93
NO
0:05
5.1
1:02
8/15/93
NO
0:56
9.3
8/17/93
NO
0:10
9.3
0:10
8/19/93
NO
0:41
5.3
0:41
8/20/93
NO
0:18
5.6
8120/93
NO
0:16
5.6
0:53
8/20/93
NO
0:09
11.1
8/20/93
NO
0:08
5.1
8/23/93
NO
0:38
4.9
0:43
8/23/93
NO
0:05
5.8
8/24/93
NO
0:08
5.5
8/24/93
NO
023,
3.7.
0:38
8/24/93
NO
0:05
4.1
8/25/93
NO
0:13
32.
0:13
8/26/93
NO
0:10
10.2
8/26/93
NO
021
9.9
0:43
8126/93
NO
0:06
9.5
8/26/93
NO
0:05
9.1
8/27/93
NO
0:11
4.7
0:17
8/27/93
NO
0:05
9.3
8129/93
NO
0:08
10.4
8/29/93
NO
0:05
10.1
025
8/29/93
NO
0:10
52
MONTH OF AUGUST TOTAL 13:56
V)
m
Page 1

PH EXCURSIONS FOR SEPTEMBER
DATE
> 1 HOUR
DURATION
MINIMAX VALUE
DAILY TOTAL
9I2193
NO
0:13
3.8
912/93
NO
0:07
9.6
0:39
9I2/93
NO
0:19
5.2
914/93
NO
0:14
4.8
0:14
9/5/93
NO
0:19
3.7
9/5/93
NO
0:10
5.3
1:32
9/5/93
NO
0:35
9.9
9/5/93
NO
0:26
92
917/93
NO
0:15
5.2
0:49
9/7/93
NO
0:33
10.1
9/8/9:
NO
0:10
9.8
0:10
9/9193
NO
0:19
9.2
0:19
9/10/93
NO
0:16
5.2
0:16
9/11/93
NO
0:10
9.3
0:10
9/14/93
NO
0:05
9.3
0:05
9/16/93
NO
0:16
5.7
0:31
9/16/93
NO
0:15
9.6
9/17/93
NO
0:08
9.7
9/17/93
NO
0:16
5.7
0:39
9/17/93
NO
0:15
9.6
9/30/93
NO
0:42
4.4
9/30/93
NO
0:27
12.0
1:41
9/30/93
NO
0:31
5.0
MONTH OF SEPTEMBER TOTAL 7:06
Pace 1 _

OCT93PH.XLS
PH EXCURSION
REPORT FOR OCTOBER
DATE
>1 HOUR
DURATION
MIN. VALUE
MAX. VALUE
DAILY TOTAL
10/1 /93
NO
15
5.4
1-Oct
NO
50
4.1
1-Oct
NO
13
4.1
1-Oct
NO
7
10.3
1-Oct
NO
21
5.2
1-Oct
NO
15
5.44
1-Oct
NO
20
5.58
2:21
2-Oct
NO
22
5.7
2-Oct
NO
21
4:36
2-Oct
NO
2
5.7
2-Oct
NO
29
5.4
1:14
3-Oct
YES
63
5
1:03
4-Oct
NO
- 1
9.2
4-Oct
NO
7
5.9
4-Oct
NO
17
9.6
4-Oct
NO
43
3.75
4-Oct
NO
5
5.8
4-Oct
NO
30
5.4
4-Oct
NO
31
5.1
2:14
5-Oct
NO
16
9.7
5-Oct
NO
14
9.8
0:30
6-Oct
NO
14
4.17
0:14
-7-Oct
NO
10
5
7-Oct
NO
40
5.32
0:50
8-Oct
NO
35
10.2
8-Oct
NO
20
5.2
0:55
10-Oct
NO
5
5.6
0:05
11-Oct
NO
13
5.7
0:13
12-Oct
NO
23
4.8
12-Oct
NO
11
4.8
0:34
13-Oct
NO
39
5.2
13-Oct
NO
28
4.84
13-Oct
NO
17
4.2
13-Oct
NO
7
5.62
1:31 ;
18-Oct
NO
28
911
0:28
19-Oct
NO
16
4.49
0:16
20-07
NO
19
4.22
20-Oct
NO
22
4.13
20-Oct
NO
19
5.2
20-Oct
NO
20
4.8
1:20
22-Oct
NO
33
5
22-Oct
NO
7
9.1
0:40
24-Oct
NO
42
11.4
24-Oct
NO
6
5.64
0:48
25-Oct
NO 1
14
3.6
Tdr 12 . + +
Page 1

OCT93PH.XLS
25-Oct
NO
3
25-Oct
NO
18
5.9
25-Oct
NO
13
5.7
0:48
26-Oct
NO
25
5.3
0:25
27-Oct
NO
27
5.7
0:27
28-Oct
NO
24
5.1
28-Oct
NO
2
9.5
28-Oct
NO
3
5.8
28-Oct
NO
26
9.9
28-Oct
NO
10
9.1
1:05
30-Oct
NO
7
9.93
30-Oct
NO
4
10.1
0:11
31-Oct
NO
2
5.99
31-Oct
NO
20
9.9
0:22
=_
I
Total Excursion Time
! 18:34
Page 2

PHLOGOCT.XLS
Date
<6.0
Time Out
Time In
>9.0
Tot. Min.
GPS
Regen. Cycle
Action
Remarks
_
10/1 /93
5.4
6:53
7:08
15
0.99
#3 MB Rinse
Add Caustic
�V1-Oct
7:47
8:37
50
Surge Pump On
1-Oct
_4.1
4.1
8:49
9:02
13
0.51
ame
1-Oct
9:02
9:09
10.3
7
0.51
Same
1-_Oct
1-Oct
_ _
5.2
12:03
12:24
21
Same__
_
5.4
20:49
21:04
15
_
0.84
�__�
#1 Anion Rinse_
1-Oct
5.6
22:09
22:29
20
0.77
None
5.7
16:04
16:26
22_
1.16
Cracked
Acid Day Tank
_ _2-Oct
Open Caustic
Overflowing
2-Oct
4.4
16:47
17:08
21
2.93
Same
Same
_
2-Oct
5.7
17:18
17:20
2
1.28
Some
Some
_
2-Oct
5.4
6:37
7:06
29
Same _
3-Oct
5
23:47
0:50
63
0.86
#2Cation RIns4
Add Caustic
4-Oct
0:52
0:53
9.2
1
0.86
Overshot
Anti-Cyphone
4-Oct
5.9
5:41
5:48
.7
valve leaking
4-Oct
16:59
17:16
9.6
17
2.9
Plant Trip
4-Oct
3.8
17:31
18:14
43
2.9
Same
_
4-Oct
_
5.8
18:44
18:49
5
0.6
4-Oct
5.4
19:45
20:15
30
0.3
4-Oct
5.1
21:01
21:32
31
0.8
5-Oct
7:12
7:28
9.7
16
2.5
Dumping Neut. T.
5-Oct
12:04
12:18
9.8
14
1.8
#2 Demin.
_
_
Acid Disp.
6-Oct
_
4.2
21:23
21:37
14
0.42
Added Caus.
Regen.?
7-Oct
_ 5
0:08
0:18
10
0.84
#1 MB Fin.Rin.
Added Caus.
7-Oct
5.3
7:41
8:21
40
0.92
Anion Caus.
Added Caus.
Disp.
_
8-Oct
4:29
5:04
10.2
35
1.9
#1 Anion F.R.
_
8-Oct
5.2
13:47
14:07
20
#2 Demin.
Caustic Pump
Stuck @ 0%
10-Oct
5.6
13:34
13:39
1 5
1.16
Final Rinse
11-Oct
5.7
3:09
3:221
1 131
1.1
Page 1

PHLOGOCT.XLS
31-Oct 23:39 23:591 99F 201 1.14 Acid Tank Low
Page 3

NOV93PH.XLS
Date
<6.0
Time Out
Time In
>9.0
Tot. Min.
GPS
Regen. Cycle
Action
Remarks
1-Nov
0:00
0:18
9.4
18
1.4
Acid Pump Tripped
1-Nov
5.1
20:35
20:43
8
0.93
Cation BW
Added Caus.
1-Nov
20:39
20:42
11
3
0.98
Cation BW
Overshot
ul-Nov
5.3
20:44
20:51
7
0.98
Cation BW
Overshot
2-Nov
4-Nov
5.8
23:48
0:07
19
0.42
Added Caus.
Added Caus.
Caus Pump Stroke Controller _
_
3.4
11:03
_
11:21
18
0.86
_
Pump Diaphram
�7-Nov
18:32
18:37
10
14
0.7
Over Shot Caus. Add
14-Nov
4
6:24
6:32
8
0.59
Added Caus.
Pump Problem
14-Nov
6:32
6:44
10
12
0.63
Overshot
5.3
8:36
8:54
18
0.63
Added Caus.
Pump Problem
_14_-Nov
14-Nov
8:55
9:02
9.7
7
0.63
Added Acid
Pump Problem
m
_
14-Nov
11:55
12:08
9.1
13
2.421
Hlgh_Flow
_
18-Nov
5.7
12:17
12:33
16
0.05
No Flow, Basin Cleaned
19-Nov
16:49
16:51
9.3
2
2.89
High Flow
25-Nov
4.3
1:33
1:42
9
0.5
_
Power Outage
27-Nov
12:03
12:05
9.1
2
2.921
Acid tank low
27-Nov
18:00
18:15
9.6
15
2.921
Heavy Rain ,
27-Nov
20:13
20:29
9.8
16
2.92
Heavy Rain
27-Nov
23:05
23:16
9.6
11
2.92
Heavy Rain
28_-Nov
1:00
1:04
9.11
4
2.92
Heavy Rain
_
28-Nov
4.2
8:08
8:22
1.17
#3 DM BackW
Added Caus.
28-Nov
8:24
8:28
9.5
1.17
Overshot
28-Nov
4.2
8:37
8:53
EA
0.76
#3 DM BW
Added Caus.
28-Nov
4.5
11:47
11:53
6
0.29
#3 DM FastR
Added Caus.
260
Page 1

MORNR2.XLS
Date
12/1/93
12/2/93
12/3/93
12/4/93
12/5/93
12/6/93
12/7/93
12/8/93
TG 3
_
Average Megawatts
4.3
4.3
4.2
4.6
4.7
4.2
4
4
Average Condensing
Rate
40
40
26
35
35
40
40
40
_
W.W.T.
_
PH
Maximum
8
8
8.3
8.6
9.1
10.1
8.6
8.6
Minimum
6.4
7.7
7.5
6.5
7.1
3.3
6.5
7
Total Excursion Time
0
0
0
0
0:05
0:21
0:21
0:21
Flow
Average
gps/mgd
.59/.051
.74/.06
.65/.06
.51 /.04
.9/.078
.91 /.078
.79/.069
.74/.06
Temperature
_
Maximum
F/C
68/28
70/21
68/20
69/21
66/19
68/20
71 /22
68/20
Campus _Condensate
Silica
60/54/51!
47/40/58
47/51/65
65/46/56
56/60/51
54/49/70
60/47/65
53/59/57
Cation Inlet
_
Chlorine
.07-.06-.33.25/.71
/.0
.07/.07/.0
.03/.01 /.2
.1 /.02/.06
.02/.07/.1
.25/.02/.0
.02/.02/.08
Mixed Bed Mmohs
1 0.761
0.91
1.6/.75
1.8/.56
1.47/.69
1 - 0.95
1
1.6
Page 2

GREENHORNE & O'MARA, INC.
5580 CENTERVIEW DRIVE • SUITE 100-BLADEN BLDG. •RALEIGH, NC 27606-3389 • [phone] FAX: [phone]
PROPOSED MEETING AGENDA
DATE:
December 10, 1993
TIME:
1:30 p.m. - 3:30 p.m.
LOCATION:
NCDEM - Archdale Building
Raleigh, NC
ATTENDEES:
NCDEM
UNC-Chapel Hill
Greenhorne & O'Mara, Inc.
PURPOSE:
The meeting is being held to discuss several items
associated with
the University's wastewater treatment system at
the new boiler
plant:
(1) SOC Extension
(2) Permit Limits
(3) Permit Renewal
5 min.
Introductions
All
10 min.
Project Overview
G&O
15 min.
Presentation of SOC Request & Background
UNC-Chapel Hill
20 min.
Discussion of SOC
All
10 min.
Presentation of Permit Limits & Monitoring
G&O
o Iron Limits
20 min.
Discussion
All
10 min.
Status of Permit Renewal Application
NCDEM
20 min.
Discussion
All
10 min.
Summary & Conclusions
All
Please review the above, note any proposed modifications and return to me by
10:00 a.m., Friday, December 10, 1993.
ANNAPOLIS, MD • ATLANTA, GA • AURORA, CO • BALTIMORE, MD - DULUTH, GA • FAIRFAX, VA • FRFDERICKSBURG, VA - GREENBELT, MD
MANASSAS, VA • MECFIANICSBURG, PA • ORLANDO, FL • RALEIGH, NC • ROCKVILLE, MD • TAMPA, FL • WALDORF, MD -WEST PALM BEACH, FL