Minutes

Intergovernmental Affairs Committee · from the Town's website · 55 pages · 2.2 MB
open the file ↗ · original at the source ↗

IG A/Finance Joint Meeting 
June 26 
7:30pm 
Harvey Hearing Room & Zoom 
Present: Councilors Belcher (HB), Swope (SS), Aiello (JA) , DaRos (JD) 
Absent: Councilor Tassinari 
Members of the Public: none 
7:33pm – Call to Order by HB 
Motion by SS to approve two prior sets of meeting minutes ( 04 APR24 & 09JUN24) 
- 2 nd by JA 
- Unanimously Approved 
• MWRA Discussion 
*Please see included document that contain s a list of questions that t hese minutes refer to* 
- List of question s developed by JA , sent to MWRA by SS 
- JA: Does MWRA have air quality monitoring in Winthrop? 
- HB: Not sure, but ai rport proximity may impact results of any monitoring; can use existing 
research o n impact of treatment plants on air quality paired with vehicle statistics and 
known air quality impacts 
- SS: What type of entity is MWRA? 
o JA: An a uthority established by legis lature ; consists of various appointees; operates 
independe nt of the state; should be self -sustaini ng; subject to rules/regs of 
emissions, envi ronmental considerations, etc. 
- JA: We should connect with Wig Zamore from MCAC – very up to date on data regarding
particulate matter, etc. 
- SS: MWRA report ed only 2 odor complaints in 2023 
- QUESTION: Can we get breakdown of car vs. truck traffic to Deer Island? Amount of we ar
and tear/pollutants is different for each 
o JA: Need to look at emissions data for employee car trips on an average week; asked
MWRA about their capital plan to see if there are major project s planned that would
increase tra ffic 
- SS: What is there is a fire on one of the delivery trucks? Can we require additional insurance 
to co ver potential damage? Minutes are followed by supplementary information provided 
by the MWRA

o HB: That is a main concern of my constituents – we likely can’ t require additional 
insuranc e, but we should know what the financial management approach w ould be 
based on the MWRA ’s contracts with the tr ucking companies 
o JA: As part of their risk management mitigation, we could ask for a significant 
amount towards Winthrop Fire Department – f unds towards the fire house or a 
truck 
- SA: What should Winthrop’ s main negotiation strategy be? What is our biggest need? 
o JA: water mains and sewer pipes under our roadways should be of interest to 
M WRA, as climate change continues to compromise our roadways and the pipes 
below them, access to Deer Island may become compromised 
o JA: DPW Director Calla should be contacted about urg ent needs 
- JD : Constituents have mentioned delivery trucks that are NOT being esc orted by WPD per 
agreement 
- HB: Response from MWRA mentions that payment for dog officer is “ paid outside of the 
MOU” – we need a full list of any payments or services MWRA provides Winthrop that are
not included in the MOU – anything outs ide of the MOU is a t ri sk of being tak en away 
- SS: Are water rates the same for all MWRA Communities? 
o JA: Yes 
- JA: Need to look at str eam of payments year by year – determine what payments would be
in 2024 wh en adjusted for inflation 
o HB: Will do data analysis 
- JA: Need to discuss with Paul Flanagan, our representative on the MWRA Board; State 
del egation will be important in securing fair mitigation agreement 
- JA: Need to propose that the Cou ncil fill our vacant MWRA CAC seat ASAP 
- JD: Mitigation needs to have heavy focus on climat e/resiliency 
Actions Items: 
- SS to contact Director Calla 
- JD to discuss capital plan & being an Environmental Justic e community with Manager Marino 
- HB/JA: to meet with WPD Chief and WFD Chief 
- JA: Invite Paul Flanagan to upcoming meeting 
- SS: Send follow up questions to MWRA 
- HB: do inflation analysis 
- JA: Reach out to Wig Zamore 
Nex t Meeting: Friday, July 12 th at Noon

Meeting adjourned at 8:59pm 
Minutes are followed by supplementary information
provided by the MWRA.

2018 2019 2020 2021 2022 2023 2024 ‐ to date 
Jan 0 0 0 0 0 0 0
Feb 0 1 0 0 0 0 0
Mar 0 0 0 0 0 0 1
Apr 0 0 0 0 0 0 0
May 0 0 0 0 0 0
Jun 1 1 1 0 4 0
Jul 6 4 3 0 2 0
Aug 1 3 6 0 2 1
Sep 2 3 2 1 2 0
Oct 0 1 0 2 1 0
Nov 0 0 0 0 1 1
Dec 0 0 0 0 0 0 
Total #Calls 10 13 12 3 12 2 1
Number of Odor Complaint Calls
Summary of DITP Odor Complaints Calls from the Public (2018 to 2024 ‐ to date)
Month 
1
6
1
2
1 1
4
3 3
1 1
3
6
2
1
2
4
2 2 2
1 1 1 1 1
0
1
2
3
4
5
6
7
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
# of Odor Complaint Calls
# of DITP Odor Complaint Calls Received from the Public
(2018 to 2024 ‐ to date)
2018 2019 2020 2021 2022 2023 2024 ‐ to date Type text here

MWRA Deer Island Power Plant Monthly Report From: 01-Dec-19
CTG 1 and CTG 2 To: 31-Dec-19
365-DAY ROLLING TOTAL (Both Units Combined)
EMISSIONS, TONS
Daily
DAY Daily Fuel Fuel
Hours gal Hours gal NOx PM VOC CO SO2
1-Dec-19 0.00 0 690.1 742,121 6.190 1.102 0.065 1.148 0.054 
2-Dec-19 0.00 0 690.1 742,121 6.190 1.102 0.065 1.148 0.054 
3-Dec-19 0.00 0 690.1 742,121 6.190 1.102 0.065 1.148 0.054 
4-Dec-19 2.10 2,299 692.2 744,420 6.209 1.106 0.065 1.152 0.054 
5-Dec-19 0.00 0 692.2 744,420 6.209 1.106 0.065 1.152 0.054 
6-Dec-19 0.00 0 692.2 744,420 6.209 1.106 0.065 1.152 0.054 
7-Dec-19 0.00 0 692.2 744,420 6.209 1.106 0.065 1.152 0.054 
8-Dec-19 0.00 0 692.2 744,420 6.209 1.106 0.065 1.152 0.054 
9-Dec-19 0.00 0 692.2 744,420 6.209 1.106 0.065 1.152 0.054 
10-Dec-19 0.00 0 692.2 744,420 6.209 1.106 0.065 1.152 0.054 
11-Dec-19 0.00 0 692.2 744,420 6.209 1.106 0.065 1.152 0.054 
12-Dec-19 0.00 0 692.2 744,420 6.209 1.106 0.065 1.152 0.054 
13-Dec-19 0.48 526 692.6 744,946 6.214 1.106 0.065 1.153 0.054 
14-Dec-19 0.00 0 692.6 744,946 6.214 1.106 0.065 1.153 0.054 
15-Dec-19 0.00 0 692.6 744,946 6.214 1.106 0.065 1.153 0.054 
16-Dec-19 0.00 0 692.6 744,946 6.214 1.106 0.065 1.153 0.054 
17-Dec-19 0.00 0 690.7 742,626 6.194 1.103 0.065 1.149 0.054 
18-Dec-19 0.00 0 690.7 742,626 6.194 1.103 0.065 1.149 0.054 
19-Dec-19 0.00 0 690.7 742,626 6.194 1.103 0.065 1.149 0.054 
20-Dec-19 0.00 0 690.7 742,626 6.194 1.103 0.065 1.149 0.054 
21-Dec-19 0.00 0 690.7 742,626 6.194 1.103 0.065 1.149 0.054 
22-Dec-19 0.00 0 690.7 742,626 6.194 1.103 0.065 1.149 0.054 
23-Dec-19 0.00 0 690.7 742,626 6.194 1.103 0.065 1.149 0.054 
24-Dec-19 0.00 0 690.7 742,626 6.194 1.103 0.065 1.149 0.054 
25-Dec-19 0.00 0 690.7 742,626 6.194 1.103 0.065 1.149 0.054 
26-Dec-19 0.00 0 690.7 742,626 6.194 1.103 0.065 1.149 0.054 
27-Dec-19 0.00 0 690.7 742,626 6.194 1.103 0.065 1.149 0.054 
28-Dec-19 0.00 0 690.7 742,626 6.194 1.103 0.065 1.149 0.054 
29-Dec-19 0.00 0 690.7 742,626 6.194 1.103 0.065 1.149 0.054 
30-Dec-19 0.00 0 690.7 742,626 6.194 1.103 0.065 1.149 0.054 
31-Dec-19 0.00 0 690.7 742,626 6.194 1.103 0.065 1.149 0.054 
3,881,000 61.4 10.3 2.0 17.0 13.8 Permit Limits - 12 month rolling average 
1/13/2020 / CTGs

Massachusetts Water Resources Authority
Deer Island Power Plant Monthly Report
CP-301 GAS FLARES
Dec-19
GAS 365 DAY Rolling 365 Day
DAY FLARE TOTAL NOx PM VOC CO SO2
kscf kscf tpy tpy tpy tpy tpy
30-Nov-19 0.0 49,614 0.87 0.12 0.04 0.34 1.94 
1-Dec-19 0.0 49,614 0.87 0.12 0.04 0.34 1.94 
2-Dec-19 0.0 49,614 0.87 0.12 0.04 0.34 1.94 
3-Dec-19 0.0 49,614 0.87 0.12 0.04 0.34 1.94 
4-Dec-19 0.0 49,614 0.87 0.12 0.04 0.34 1.94 
5-Dec-19 0.0 49,614 0.87 0.12 0.04 0.34 1.94 
6-Dec-19 0.0 49,614 0.87 0.12 0.04 0.34 1.94 
7-Dec-19 0.0 49,614 0.87 0.12 0.04 0.34 1.94 
8-Dec-19 0.0 49,614 0.87 0.12 0.04 0.34 1.94 
9-Dec-19 0.0 49,614 0.87 0.12 0.04 0.34 1.94 
10-Dec-19 0.0 49,614 0.87 0.12 0.04 0.34 1.94 
11-Dec-19 0.0 49,614 0.87 0.12 0.04 0.34 1.94 
12-Dec-19 0.0 49,614 0.87 0.12 0.04 0.34 1.94 
13-Dec-19 0.0 49,614 0.87 0.12 0.04 0.34 1.94 
14-Dec-19 3.4 49,617 0.87 0.12 0.04 0.34 1.94 
15-Dec-19 222.3 49,840 0.88 0.12 0.04 0.35 1.95 
16-Dec-19 0.0 49,676 0.87 0.12 0.04 0.35 1.94 
17-Dec-19 0.0 49,533 0.87 0.12 0.04 0.34 1.93 
18-Dec-19 0.0 49,533 0.87 0.12 0.04 0.34 1.93 
19-Dec-19 0.0 49,533 0.87 0.12 0.04 0.34 1.93 
20-Dec-19 0.0 49,533 0.87 0.12 0.04 0.34 1.93 
21-Dec-19 0.0 49,533 0.87 0.12 0.04 0.34 1.93 
22-Dec-19 0.0 49,533 0.87 0.12 0.04 0.34 1.93 
23-Dec-19 0.0 49,533 0.87 0.12 0.04 0.34 1.93 
24-Dec-19 0.0 49,533 0.87 0.12 0.04 0.34 1.93 
25-Dec-19 0.0 49,533 0.87 0.12 0.04 0.34 1.93 
26-Dec-19 0.0 49,533 0.87 0.12 0.04 0.34 1.93 
27-Dec-19 0.0 49,533 0.87 0.12 0.04 0.34 1.93 
28-Dec-19 0.0 49,533 0.87 0.12 0.04 0.34 1.93 
29-Dec-19 0.0 49,533 0.87 0.12 0.04 0.34 1.93 
30-Dec-19 0.0 49,533 0.87 0.12 0.04 0.34 1.93 
31-Dec-19 0.0 49,533 0.87 0.12 0.04 0.34 1.93 
Note: 1) The gas meter has been sent back to manufacturer due to a failure as of 1/15/97. Reinstalled 3/18/97. 
1) Daily Gas Flare = Daily Gas Production - Daily gas to Boilers (adjusted - see report text) 
1/13/2020 / FLARE S Minutes are followed by supplementary information provided 
by theMWRA

MWRA Deer Island Power Plant Monthly Report
Dec-19
ZURNS Boilers, Units 101 & 201
365-Rolling Total
Day No. 2 Oil D. G. Hours PM VOC
kgal kscf Operating tpy tpy 
30-Nov-19 0.357 4727 8,820.8 2.769 1.605
01-Dec-19 3.205 4020 8,820.8 2.769 1.605
02-Dec-19 2.129 4223 8,820.8 2.768 1.604
03-Dec-19 0.000 4943 8,820.8 2.767 1.603
04-Dec-19 0.000 4752 8,820.8 2.766 1.603
05-Dec-19 0.000 4842 8,820.8 2.767 1.603
06-Dec-19 0.000 5134 8,820.8 2.767 1.604
07-Dec-19 0.000 5247 8,820.8 2.767 1.604
08-Dec-19 0.000 5589 8,820.8 2.767 1.604
09-Dec-19 0.000 4798 8,820.8 2.766 1.603
10-Dec-19 0.000 5204 8,820.8 2.766 1.603
11-Dec-19 0.000 5524 8,820.8 2.768 1.605
12-Dec-19 0.000 4824 8,820.8 2.770 1.607
13-Dec-19 0.000 4949 8,820.3 2.770 1.607
14-Dec-19 0.000 5097 8,812.0 2.769 1.607
15-Dec-19 0.000 5899 8,812.0 2.770 1.607
16-Dec-19 0.000 5041 8,812.0 2.769 1.607
17-Dec-19 0.000 4376 8,812.0 2.767 1.605
18-Dec-19 2.940 4108 8,812.8 2.766 1.604
19-Dec-19 0.115 5218 8,813.5 2.767 1.605
20-Dec-19 0.786 4889 8,813.5 2.767 1.605
21-Dec-19 0.000 5492 8,804.0 2.767 1.605
22-Dec-19 0.000 5376 8,804.0 2.766 1.605
23-Dec-19 0.000 4516 8,804.0 2.764 1.604
24-Dec-19 0.000 4324 8,804.3 2.763 1.604
25-Dec-19 0.000 4447 8,804.3 2.762 1.603
26-Dec-19 0.000 4713 8,804.3 2.762 1.604
27-Dec-19 0.000 4152 8,804.3 2.761 1.604
28-Dec-19 0.000 4131 8,804.3 2.759 1.604
29-Dec-19 0.000 4624 8,804.3 2.758 1.603
30-Dec-19 0.000 4464 8,804.3 2.757 1.603
31-Dec-19 0.000 5842 8,804.3 2.758 1.604

Date: Jan 08 2020
Time: 09:20
MWRA
Deer Island, MA 
Page I of I 
Begin: Dec 01, 2019 00:00
End: Dec 31, 2019 23:59 
***" MULTl-PARAMETER SUMMARY REPORT**'** 
365 Day Emissions - Combined Boilers
Start 365 Day 365 Day
Total Total
S02 NOX 
tons tons 
-------- --------- --------- 
12/01/19 4.10125 13.54825
12/02/19 4.09466 13.54774
12/03/19 4.09048 13.53874
12/04/19 4.08539 13. 52706
12/05/19 4.08481 13.50429
12/06/19 4.08177 13.49302
12/07/19 4.07510 13.48781
12/08/19 4.06936 13.48095
12/09/19 4.05753 13.46517
12/10/19 4.05044 13.45436
12/11/19 4.05028 13.44083
12/12/19 4.05289 13. 43057
12/13/19 4.04463 13.42294
12/14/19 4.04024 13.40732
12/15/19 4. 03677 13.41401
12/16/19 4.02984 13.41795
12/17/19 4.02045 13.41176
12/18/19 4.01442 13.42714
12/19/19 4.00740 13.43148
12/20/19 4.00403 13.42051
12/21/19 3.99060 13.43065
12/22/19 3.98373 13.43241
12/23/19 3.97749 13. 42159
12/24/19 3.97316 13.42708
12/25/19 3.96698 13.41075
12/26/19 3.96328 13. 39043
12/27/19 3. 96095 13.36373
12/28/19 3.95840 13.34181
12/29/19 3.95127 13. 32764
12/30/19 3.94371 13.32248
12/31/19 3.94625 13. 31150 
-------- --------- --------- 
Re p ort produced by Cirrus 
365 Day 365 Day
Total Total 
co HI 
tons mmBtu 
--------- --------- 
1.13898 1081473.750
1.14006 1081176.750
1.14040 1080861.000
1.14916 1080623.125
1.15214 1080642.750
1.15624 1080833.500
1.15755 1080777.250
1.15815 1080761.125
1.15970 1080327.250
1.15997 1080356.500
1.16142 1080926.625
1.13761 1081391.750
1.13562 1081415.000
1.11082 1081160.875
1.10972 1081299.375
1.10870 1081053.375
1.10871 1080186.250
1.11007 1079997.250
1.11466 1080204.500
1.11555 1080080.625
1. 07293 1080007.500
1.07191 1079856.500
1. 07117 1079133. 000
1. 07064 1078427.750
1. 06256 1077921. 625
1.05959 1077694.250
1. 05976 1077158.000
1. 05702 1076515.875
1. 06158 1076049.875
1.06351 1075469. 625
1.05756 1075759.500 
--------- --------- 
DAS S/N (00000001) 
l J0i'"'tlV1/\

5/17/2024, 2:26 PM 
Month-Year 
# Exceedances
(>1.0 ppmv TRS) Notes 
Tons 
12-Month Rolling
Total Tons 
12-Month Rolling
Total 
Jan-19 0.000 0.005 0.015 0.145 0 
Feb-19 0.000 0.005 0.009 0.142 0 
Mar-19 0.000 0.005 0.015 0.147 0 
Apr-19 0.000 0.005 0.014 0.152 0 
May-19 0.000 0.005 0.024 0.163 0 
Jun-19 0.000 0.005 0.013 0.166 0 
Jul-19 0.000 0.005 0.009 0.166 0 
Aug-19 0.000 0.004 0.009 0.159 0 
Sep-19 0.000 0.004 0.009 0.158 0 
Oct-19 0.000 0.004 0.009 0.155 0 
Nov-19 0.000 0.004 0.010 0.155 0 
Dec-19 0.000 0.004 0.009 0.145 0 
Emissions Limitations: 0.040 0.230 0.800 5.400 1.0 ppmv TRS 
Current Detection Limits, ppm v: 0.01 0.20 
Massachusetts Water Resources Authority
Deer Island Treatment Plant 
Pumping Odor Control (CP102) - Stack # 1
DEP Conditional Permit No: MBR-91-IND-007A 
Total Reduced Sulfur (TRS) 
Total Non-Methane
Hydrocarbons (TNMHC)

5/17/2024, 2:26 PM 
Month-Year 
# Exceedances
(>1.0 ppmv TRS) Notes 
Tons 
12-Month Rolling
Total Tons 
12-Month Rolling
Total 
Jan-19 0.003 0.048 0.074 1.300 0 
Feb-19 0.003 0.047 0.068 1.301 0 
Mar-19 0.003 0.047 0.092 1.295 0 
Apr-19 0.003 0.047 0.079 1.301 0 
May-19 0.003 0.043 0.094 1.271 0 
Jun-19 0.003 0.043 0.105 1.251 0 
Jul-19 0.003 0.040 0.095 1.208 0 
Aug-19 0.003 0.039 0.122 1.210 0 
Sep-19 0.007 0.040 0.091 1.128 0 
Oct-19 0.004 0.041 0.090 1.092 0 
Nov-19 0.004 0.042 0.090 1.085 0 
Dec-19 0.003 0.042 0.150 1.150 0 
Emissions Limitations: 0.500 4.000 5.600 34.000 1.0 ppmv TRS 
Current Detection Limits, ppm v: 0.01 0.20 
Total Reduced Sulfur (TRS) 
Total Non-Methane
Hydrocarbons (TNMHC) 
Massachusetts Water Resources Authority
Deer Island Treatment Plant 
Primary A-D, East/West Grit Odor Control (CP103) - Stack # 2 & 3 
DEP Conditional Permit No: MBR-91-IND-007B

5/17/2024, 2:26 PM 
Month-Year 
# Exceedances
(>1.0 ppmv TRS) Notes 
Tons 
12-Month Rolling
Total Tons 
12-Month Rolling
Total 
Jan-19 0.000 0.005 0.012 0.209 0 
Feb-19 0.000 0.005 0.010 0.208 0 
Mar-19 0.000 0.005 0.012 0.205 0 
Apr-19 0.000 0.005 0.015 0.202 0 
May-19 0.000 0.005 0.012 0.185 0 
Jun-19 0.000 0.005 0.021 0.187 0 
Jul-19 0.000 0.005 0.012 0.166 0 
Aug-19 0.000 0.005 0.017 0.159 0 
Sep-19 0.000 0.005 0.011 0.155 0 
Oct-19 0.000 0.005 0.014 0.158 0 
Nov-19 0.000 0.005 0.012 0.159 0 
Dec-19 0.000 0.005 0.035 0.183 0 
Emissions Limitations: 0.1250 1.0000 0.3600 2.2000 1.0 ppmv TRS 
Current Detection Limits, ppm v: 0.01 0.20 
Total Reduced Sulfur (TRS) 
Total Non-Methane
Hydrocarbons (TNMHC) 
Massachusetts Water Resources Authority
Deer Island Treatment Plant 
Secondary Odor Control (CP202) - Stack # 5
DEP Conditional Permit No: MBR-92-IND-056

5/17/2024, 2:26 PM 
Month-Year 
# Exceedances
(>1.0 ppmv TRS) Notes 
Tons 
12-Month Rolling
Total Tons 
12-Month Rolling
Total Tons 
12-Month Rolling
Total 
Jan-19 0.002 0.039 0.047 0.759 0.022 0.276 0 No NH3 data for January 2019. 
Feb-19 0.002 0.033 0.042 0.755 0.021 0.276 0 
Mar-19 0.002 0.033 0.046 0.755 0.023 0.276 0 
Apr-19 0.002 0.032 0.045 0.753 0.022 0.275 0 
May-19 0.002 0.029 0.047 0.725 0.024 0.276 0 
Jun-19 0.002 0.028 0.052 0.692 0.023 0.276 0 
Jul-19 0.002 0.027 0.053 0.676 0.024 0.276 0 
Aug-19 0.002 0.026 0.051 0.652 0.024 0.276 0 
Sep-19 0.004 0.025 0.046 0.604 0.023 0.276 0 
Oct-19 0.004 0.027 0.071 0.598 0.024 0.276 0 
Nov-19 0.003 0.028 0.046 0.595 0.023 0.276 0 
Dec-19 0.002 0.028 0.047 0.594 0.023 0.275 0 
Emissions Limitations: 0.250 2.000 3.800 23.300 verify <1 tpy 1.0 ppmv TRS 
Current Detection Limits, ppm v: 0.01 0.20 0.25 
Massachusetts Water Resources Authority
Deer Island Treatment Plant 
Primary Residuals Odor Control (CP301) - Stack # 4 and Secondary Residuals Odor Control (CP303) - Stack # 4 
DEP Conditional Permit No: MBR-91-IND-007C and MBR-91-IND-007D 
Total Reduced Sulfur (TRS) 
Total Non-Methane
Hydrocarbons (TNMHC) Ammonia (NH3)

MWRA Deer Island Power Plant Monthly Report From: 01-Dec-20
CTG 1 and CTG 2 To: 31-Dec-20 
365-DAY ROLLING TOTAL (Both Units Combined)
EMISSIONS, TONS 
Daily
DAY Daily Fuel Fuel
Hours gal Hours gal NOx PM VOC CO SO2 
1-Dec-20 0.00 0 191.1 184,700 1.523 0.283 0.011 0.287 0.012 
2-Dec-20 0.00 0 191.1 184,700 1.523 0.283 0.011 0.287 0.012 
3-Dec-20 0.00 0 189.0 182,401 1.505 0.279 0.011 0.283 0.012 
4-Dec-20 0.77 833 189.8 183,234 1.512 0.281 0.011 0.285 0.012 
5-Dec-20 0.00 0 189.8 183,234 1.512 0.281 0.011 0.285 0.012 
6-Dec-20 0.00 0 189.8 183,234 1.512 0.281 0.011 0.285 0.012 
7-Dec-20 0.00 0 189.8 183,234 1.512 0.281 0.011 0.285 0.012 
8-Dec-20 0.00 0 189.8 183,234 1.512 0.281 0.011 0.285 0.012 
9-Dec-20 0.00 0 189.8 183,234 1.512 0.281 0.011 0.285 0.012 
10-Dec-20 0.23 67 190.0 183,301 1.512 0.281 0.011 0.285 0.012 
11-Dec-20 0.94 1,081 191.0 184,382 1.521 0.282 0.011 0.287 0.012 
12-Dec-20 0.00 0 190.5 183,856 1.517 0.282 0.011 0.286 0.012 
13-Dec-20 0.00 0 190.5 183,856 1.517 0.282 0.011 0.286 0.012 
14-Dec-20 0.00 0 190.5 183,856 1.517 0.282 0.011 0.286 0.012 
15-Dec-20 0.00 0 190.5 183,856 1.517 0.282 0.011 0.286 0.012 
16-Dec-20 0.00 0 190.5 183,856 1.517 0.282 0.011 0.286 0.012 
17-Dec-20 0.00 0 190.5 183,856 1.517 0.282 0.011 0.286 0.012 
18-Dec-20 2.39 2,580 192.9 186,436 1.538 0.286 0.011 0.290 0.012 
19-Dec-20 0.00 0 192.9 186,436 1.538 0.286 0.011 0.290 0.012 
20-Dec-20 0.00 0 192.9 186,436 1.538 0.286 0.011 0.290 0.012 
21-Dec-20 0.00 0 192.9 186,436 1.538 0.286 0.011 0.290 0.012 
22-Dec-20 0.00 0 192.9 186,436 1.538 0.286 0.011 0.290 0.012 
23-Dec-20 0.00 0 192.9 186,436 1.538 0.286 0.011 0.290 0.012 
24-Dec-20 0.00 0 192.9 186,436 1.538 0.286 0.011 0.290 0.012 
25-Dec-20 10.27 12,380 203.2 198,816 1.643 0.302 0.013 0.308 0.013 
26-Dec-20 24.00 24,909 227.2 223,725 1.855 0.335 0.018 0.346 0.014 
27-Dec-20 5.38 5,356 232.5 229,081 1.900 0.342 0.019 0.354 0.015 
28-Dec-20 0.00 0 232.5 229,081 1.900 0.342 0.019 0.354 0.015 
29-Dec-20 0.00 0 232.5 229,081 1.900 0.342 0.019 0.354 0.015 
30-Dec-20 0.00 0 232.5 229,081 1.900 0.342 0.019 0.354 0.015 
31-Dec-20 0.00 0 232.5 229,081 1.900 0.342 0.019 0.354 0.015 
3,881,000 61.4 10.3 2.0 17.0 13.8 Permit Limits - 12 month rolling average 
1/15/2021 / CTGs

Massachusetts Water Resources Authority
Deer Island Power Plant Monthly Report 
CP-301 GAS FLARES 
Dec-20 
GAS 365 DAY Rolling 365 Day
DAY FLARE TOTAL NOx PM VOC CO SO2
kscf kscf tpy tpy tpy tpy tpy
30-Nov-20 0.0 23,281 0.41 0.06 0.02 0.16 0.91 
1-Dec-20 0.0 23,281 0.41 0.06 0.02 0.16 0.91 
2-Dec-20 0.0 23,281 0.41 0.06 0.02 0.16 0.91 
3-Dec-20 0.0 23,281 0.41 0.06 0.02 0.16 0.91 
4-Dec-20 0.0 23,281 0.41 0.06 0.02 0.16 0.91 
5-Dec-20 0.0 23,281 0.41 0.06 0.02 0.16 0.91 
6-Dec-20 0.0 23,281 0.41 0.06 0.02 0.16 0.91 
7-Dec-20 0.0 23,281 0.41 0.06 0.02 0.16 0.91 
8-Dec-20 0.0 23,281 0.41 0.06 0.02 0.16 0.91 
9-Dec-20 0.0 23,281 0.41 0.06 0.02 0.16 0.91 
10-Dec-20 0.0 23,281 0.41 0.06 0.02 0.16 0.91 
11-Dec-20 0.0 23,281 0.41 0.06 0.02 0.16 0.91 
12-Dec-20 0.0 23,281 0.41 0.06 0.02 0.16 0.91 
13-Dec-20 0.0 23,278 0.41 0.06 0.02 0.16 0.91 
14-Dec-20 0.0 23,056 0.41 0.06 0.02 0.16 0.90 
15-Dec-20 0.0 23,056 0.41 0.06 0.02 0.16 0.90 
16-Dec-20 0.0 23,056 0.41 0.06 0.02 0.16 0.90 
17-Dec-20 0.0 23,056 0.41 0.06 0.02 0.16 0.90 
18-Dec-20 0.0 23,056 0.41 0.06 0.02 0.16 0.90 
19-Dec-20 0.0 23,056 0.41 0.06 0.02 0.16 0.90 
20-Dec-20 0.0 23,056 0.41 0.06 0.02 0.16 0.90 
21-Dec-20 0.0 23,056 0.41 0.06 0.02 0.16 0.90 
22-Dec-20 0.0 23,056 0.41 0.06 0.02 0.16 0.90 
23-Dec-20 0.0 23,056 0.41 0.06 0.02 0.16 0.90 
24-Dec-20 0.0 23,056 0.41 0.06 0.02 0.16 0.90 
25-Dec-20 178.0 23,234 0.41 0.06 0.02 0.16 0.91 
26-Dec-20 260.9 23,495 0.41 0.06 0.02 0.16 0.92 
27-Dec-20 0.0 23,495 0.41 0.06 0.02 0.16 0.92 
28-Dec-20 0.0 23,495 0.41 0.06 0.02 0.16 0.92 
29-Dec-20 0.0 23,495 0.41 0.06 0.02 0.16 0.92 
30-Dec-20 0.0 23,495 0.41 0.06 0.02 0.16 0.92 
31-Dec-20 0.0 23,495 0.41 0.06 0.02 0.16 0.92 
Note: 1) The gas meter has been sent back to manufacturer due to a failure as of 1/15/97. Reinstalled 3/18/97. 
1) Daily Gas Flare = Daily Gas Production - Daily gas to Boilers (adjusted - see report text) 
1/15/2021 / FLARES

MWRA Deer Island Power Plant Monthly Report 
Dec-20
ZURNS Boilers, Units 101 & 201
365-Rolling Total
Day No. 2 Oil D. G. Hours PM VOC
kgal kscf Operating tpy tpy 
30-Nov-20 0.326 4156 8,765.8 2.511 1.456
01-Dec-20 0.000 4700 8,765.5 2.511 1.457
02-Dec-20 0.000 5161 8,765.5 2.511 1.457
03-Dec-20 0.000 4722 8,765.5 2.511 1.457
04-Dec-20 0.000 4077 8,765.5 2.510 1.456
05-Dec-20 0.000 4305 8,765.5 2.509 1.455
06-Dec-20 0.000 4779 8,765.5 2.508 1.455
07-Dec-20 0.000 5321 8,765.5 2.507 1.455
08-Dec-20 0.147 4491 8,765.5 2.507 1.454
09-Dec-20 3.236 3782 8,765.5 2.506 1.453
10-Dec-20 0.773 4109 8,765.8 2.504 1.452
11-Dec-20 0.000 5028 8,765.8 2.504 1.452
12-Dec-20 0.000 4640 8,765.8 2.503 1.451
13-Dec-20 0.000 5661 8,765.8 2.504 1.452
14-Dec-20 0.186 4694 8,765.8 2.502 1.451
15-Dec-20 3.163 3698 8,765.8 2.501 1.450
16-Dec-20 3.200 3541 8,765.8 2.500 1.449
17-Dec-20 3.263 3923 8,765.0 2.500 1.449
18-Dec-20 0.855 4274 8,764.3 2.499 1.448
19-Dec-20 0.000 4446 8,764.3 2.498 1.447
20-Dec-20 0.000 4633 8,764.3 2.497 1.447
21-Dec-20 0.000 4265 8,764.3 2.495 1.445
22-Dec-20 2.947 3440 8,764.3 2.494 1.444
23-Dec-20 1.073 3882 8,764.3 2.493 1.444
24-Dec-20 0.000 4525 8,764.3 2.493 1.444
25-Dec-20 0.000 5438 8,764.3 2.495 1.445
26-Dec-20 0.000 5624 8,764.3 2.497 1.446
27-Dec-20 2.284 3834 8,764.3 2.497 1.446
28-Dec-20 3.057 3858 8,764.3 2.496 1.445
29-Dec-20 3.076 3525 8,764.3 2.496 1.444
30-Dec-20 1.755 3898 8,764.3 2.493 1.442
31-Dec-20 2.817 3956 8,764.3 2.491 1.441

Date: Jan 12 2021
Time: 07:54
MWRA
Deer Island, MA 
Page I of I 
Begin: Dec 01, 2020 00:00
End: Dec 31, 2020 23:59 
**'** MULTl-PARAMETER SUMMARY REPORT**'** 
365 Day Emissions - Combined Boilers
Start 365 Day 365 Day
Total Total
S02 NOX 
tons tons
-------- --------- --------- 
12/01/20 2.12677 12.68443
12/02/20 2.12301 12.69954
12/03/20 2.11758 12.70971
12/04/20 2.10593 12. 70811
12/05/20 2.10320 12.70788
12/06/20 2.09911 12.71078
12/07/20 2.08967 12.71583
12/08/20 2.07853 12. 72373
12/09/20 2.06228 12.74571
12/10/20 2.04449 12.74563
12/11/20 2.03341 12.75566
12/12/20 2.01907 12.76083
12/13/20 2.01958 12.78016
12/14/20 2.01069 12.78149
12/15/20 1. 99809 12.80023
12/16/20 2.00762 12.82212
12/17/20 2. 00611 12.83201
12/18/20 2.00023 12.83549
12/19/20 2.01090 12.83478
12/20/20 2. 00996 12.83172
12/21/20 1.99594 12.82809
12/22/20 1.98592 12.84659
12/23/20 1.97680 12.85732
12/24/20 1. 96792 12.86078
12/25/20 1.95754 12.87056
12/26/20 1. 94760 12.89916
12/27/20 1.93987 12. 92369
12/28/20 1.9517 5 12.94565
12/29/20 1.95891 12.96874
12/30/20 1.94416 12.97815
12/31/20 1.93155 12.99386
-------- --------- --------- 
Report produced by Cirrus 
365 Day 365 Day
Total Total 
co HI 
tons rnmBtu 
--------- --------- 
0.95300 985343.750
0.95340 985476.688
0.94464 985458.313
0.94165 984993.250
0.93754 984489.000
0.93623 984204.375
0.93571 984042.000
0.93523 983875.750
0.93514 983451.250
0.93536 982696.250
0.93518 982820.250
0.93486 982632.625
0.93458 982975.500
0.93415 982268.313
0.93323 981881.563
0.93314 981809.375
0.93501 981740. 813
0.92816 981268.000
0.92568 980891.375
0. 92567 980369.000
0.93061 979693.438
0.93163 979440.438
0.93190 979400.000
0.93294 979447.438
0.93263 979888.563
0.93457 980784.063
0.93661 980914. 250
0.93057 980864.188
0.92900 980711. 688
0.93323 979768. 063
0.93337 979259.500 
--------- --------- 
DAS S/N (00000001) 
1 /1 ')/')/)') 1

1/13/2021, 4:04 PM 
Month-Year 
# Exceedances
(>1.0 ppmv TRS) Notes 
Tons 
12-Month Rolling
Total Tons 
12-Month Rolling
Total 
Jan-20 0.000 0.004 0.026 0.157 0 
Feb-20 0.000 0.004 0.009 0.158 0 
Mar-20 0.000 0.004 0.009 0.152 0 
Apr-20 0.000 0.004 0.009 0.148 0 
May-20 0.000 0.004 0.009 0.133 0 
Jun-20 0.000 0.004 0.012 0.132 0 
Jul-20 0.000 0.004 0.011 0.134 0 
Aug-20 0.000 0.004 0.010 0.135 0 
Sep-20 0.000 0.004 0.010 0.136 0 
Oct-20 0.000 0.004 0.009 0.136 0 
Nov-20 0.000 0.004 0.009 0.135 0 
Dec-20 0.000 0.004 0.009 0.135 0 
Emissions Limitations: 0.040 0.230 0.800 5.400 1.0 ppmv TRS 
Current Detection Limits, ppm v: 0.01 0.20 
Massachusetts Water Resources Authority
Deer Island Treatment Plant 
Pumping Odor Control (CP102) - Stack # 1
DEP Conditional Permit No: MBR-91-IND-007A 
Total Reduced Sulfur (TRS) 
Total Non-Methane
Hydrocarbons (TNMHC)

1/13/2021, 4:04 PM 
Month-Year 
# Exceedances
(>1.0 ppmv TRS) Notes 
Tons 
12-Month Rolling
Total Tons 
12-Month Rolling
Total 
Jan-20 0.004 0.043 0.073 1.148 0 
Feb-20 0.003 0.043 0.068 1.148 0 
Mar-20 0.004 0.044 0.085 1.141 0 
Apr-20 0.003 0.044 0.070 1.133 0 
May-20 0.003 0.044 0.075 1.114 0 
Jun-20 0.003 0.045 0.124 1.132 0 
Jul-20 0.006 0.048 0.134 1.171 0 
Aug-20 0.004 0.048 0.173 1.223 0 
Sep-20 0.003 0.044 0.124 1.256 0 
Oct-20 0.005 0.046 0.140 1.306 0 
Nov-20 0.003 0.044 0.098 1.314 0 
Dec-20 0.003 0.044 0.079 1.243 0 
Emissions Limitations: 0.500 4.000 5.600 34.000 1.0 ppmv TRS 
Current Detection Limits, ppm v: 0.01 0.20 
Total Reduced Sulfur (TRS) 
Total Non-Methane
Hydrocarbons (TNMHC) 
Massachusetts Water Resources Authority
Deer Island Treatment Plant 
Primary A-D, East/West Grit Odor Control (CP103) - Stack # 2 &
3 DEP Conditional Permit No: MBR-91-IND-007B

1/13/2021, 4:04 PM 
Month-Year 
# Exceedances
(>1.0 ppmv TRS) Notes 
Tons 
12-Month Rolling
Total Tons 
12-Month Rolling
Total Tons 
12-Month Rolling
Total 
Jan-20 0.002 0.028 0.047 0.594 0.024 0.277 0 
Feb-20 0.002 0.029 0.044 0.596 0.022 0.277 0 
Mar-20 0.002 0.029 0.047 0.596 0.023 0.278 0 
Apr-20 0.002 0.029 0.046 0.597 0.023 0.278 0 
May-20 0.002 0.029 0.047 0.598 0.024 0.278 0 
Jun-20 0.002 0.030 0.055 0.601 0.023 0.278 0 
Jul-20 0.005 0.033 0.060 0.608 0.024 0.278 0 
Aug-20 0.006 0.037 0.075 0.631 0.023 0.278 0 
Sep-20 0.004 0.037 0.046 0.631 0.023 0.278 0 
Oct-20 0.004 0.037 0.101 0.662 0.025 0.279 0 
Nov-20 0.002 0.036 0.046 0.662 0.023 0.279 0 
Dec-20 0.002 0.036 0.047 0.662 0.024 0.279 0 
Emissions Limitations: 0.250 2.000 3.800 23.300 verify <1 tpy 1.0 ppmv TRS 
Current Detection Limits, ppm v: 0.01 0.20 0.25 
Massachusetts Water Resources Authority
Deer Island Treatment Plant 
Primary Residuals Odor Control (CP301) - Stack # 4 and Secondary Residuals Odor Control (CP303) - Stack #
4 DEP Conditional Permit No: MBR-91-IND-007C and MBR-91-IND-007D 
Total Reduced Sulfur (TRS) 
Total Non-Methane
Hydrocarbons (TNMHC) Ammonia (NH3)

1/13/2021, 4:04 PM 
Month-Year 
# Exceedances
(>1.0 ppmv TRS) Notes 
Tons 
12-Month Rolling
Total Tons 
12-Month Rolling
Total 
Jan-20 0.000 0.005 0.017 0.188 0 
Feb-20 0.000 0.005 0.011 0.189 0 
Mar-20 0.000 0.005 0.012 0.189 0 
Apr-20 0.000 0.005 0.011 0.185 0 
May-20 0.000 0.005 0.012 0.185 0 
Jun-20 0.000 0.005 0.015 0.179 0 
Jul-20 0.001 0.005 0.017 0.185 0 
Aug-20 0.000 0.005 0.023 0.190 0 
Sep-20 0.000 0.005 0.011 0.190 0 
Oct-20 0.000 0.005 0.021 0.196 0 
Nov-20 0.000 0.005 0.011 0.195 0 
Dec-20 0.000 0.005 0.012 0.172 0 
Emissions Limitations: 0.1250 1.0000 0.3600 2.2000 1.0 ppmv TRS 
Current Detection Limits, ppm v: 0.01 0.20 
Total Reduced Sulfur (TRS) 
Total Non-Methane
Hydrocarbons (TNMHC) 
Massachusetts Water Resources Authority
Deer Island Treatment Plant 
Secondary Odor Control (CP202) - Stack # 5
DEP Conditional Permit No: MBR-92-IND-056

1/13/2022 / CTGs 
MWRA Deer Island Power Plant Monthly Report From: 01-Dec-21 
CTG 1 and CTG 2 To: 31-Dec-21 
365-DAY ROLLING TOTAL (Both Units Combined) 
EMISSIONS, TONS 
Daily 
DAY Daily Fuel Fuel 
Hours gal Hours gal NOx PM VOC CO SO2 
1-Dec-21 0.00 0 196.9 217,936 1.797 0.314 0.021 0.331 0.012 
2-Dec-21 0.00 0 196.9 217,936 1.797 0.314 0.021 0.331 0.012 
3-Dec-21 0.00 0 196.9 217,936 1.797 0.314 0.021 0.331 0.012 
4-Dec-21 0.00 0 196.1 217,103 1.790 0.313 0.021 0.330 0.012 
5-Dec-21 0.00 0 196.1 217,103 1.790 0.313 0.021 0.330 0.012 
6-Dec-21 0.00 0 196.1 217,103 1.790 0.313 0.021 0.330 0.012 
7-Dec-21 0.00 0 196.1 217,103 1.790 0.313 0.021 0.330 0.012 
8-Dec-21 1.83 2,015 198.0 219,118 1.806 0.315 0.022 0.333 0.012 
9-Dec-21 0.00 0 198.0 219,118 1.806 0.315 0.022 0.333 0.012 
10-Dec-21 0.00 0 197.7 219,051 1.806 0.315 0.022 0.333 0.012 
11-Dec-21 0.00 0 196.8 217,970 1.797 0.314 0.021 0.331 0.012 
12-Dec-21 0.00 0 196.8 217,970 1.797 0.314 0.021 0.331 0.012 
13-Dec-21 0.00 0 196.8 217,970 1.797 0.314 0.021 0.331 0.012 
14-Dec-21 0.00 0 196.8 217,970 1.797 0.314 0.021 0.331 0.012 
15-Dec-21 0.00 0 196.8 217,970 1.797 0.314 0.021 0.331 0.012 
16-Dec-21 0.00 0 196.8 217,970 1.797 0.314 0.021 0.331 0.012 
17-Dec-21 0.99 1,135 197.8 219,105 1.806 0.316 0.021 0.333 0.012 
18-Dec-21 0.00 0 195.4 216,525 1.785 0.311 0.021 0.329 0.012 
19-Dec-21 0.00 0 195.4 216,525 1.785 0.311 0.021 0.329 0.012 
20-Dec-21 0.00 0 195.4 216,525 1.785 0.311 0.021 0.329 0.012 
21-Dec-21 0.00 0 195.4 216,525 1.785 0.311 0.021 0.329 0.012 
22-Dec-21 0.00 0 195.4 216,525 1.785 0.311 0.021 0.329 0.012 
23-Dec-21 0.00 0 195.4 216,525 1.785 0.311 0.021 0.329 0.012 
24-Dec-21 0.00 0 195.4 216,525 1.785 0.311 0.021 0.329 0.012 
25-Dec-21 0.00 0 185.1 204,145 1.679 0.295 0.019 0.310 0.011 
26-Dec-21 0.00 0 161.1 179,236 1.468 0.263 0.015 0.273 0.010 
27-Dec-21 0.00 0 155.8 173,880 1.423 0.256 0.014 0.265 0.010 
28-Dec-21 0.00 0 155.8 173,880 1.423 0.256 0.014 0.265 0.010 
29-Dec-21 0.00 0 155.8 173,880 1.423 0.256 0.014 0.265 0.010 
30-Dec-21 0.00 0 155.8 173,880 1.423 0.256 0.014 0.265 0.010 
31-Dec-21 0.00 0 155.8 173,880 1.423 0.256 0.014 0.265 0.010 
3,881,000 61.4 10.3 2.0 17.0 13.8 Permit Limits - 12 month rolling average

1/ 13/ 2022 /FLAR ES 
Massachusetts Water Resources Authority 
Deer Island Power Plant Monthly Report 
CP-301 GAS FLARES 
Dec-21 
GAS 365 DAY Rolling 365 Day 
DAY FLARE TOTAL NOx PM VOC CO SO2 
kscf kscf tpy tpy tpy tpy tpy 
30-Nov-21 0.0 32,210 0.57 0.08 0.02 0.22 1.26 
1-Dec-21 0.0 32,210 0.57 0.08 0.02 0.22 1.26 
2-Dec-21 0.0 32,210 0.57 0.08 0.02 0.22 1.26 
3-Dec-21 0.0 32,210 0.57 0.08 0.02 0.22 1.26 
4-Dec-21 0.0 32,210 0.57 0.08 0.02 0.22 1.26 
5-Dec-21 0.0 32,210 0.57 0.08 0.02 0.22 1.26 
6-Dec-21 0.0 32,210 0.57 0.08 0.02 0.22 1.26 
7-Dec-21 0.0 32,210 0.57 0.08 0.02 0.22 1.26 
8-Dec-21 0.0 32,210 0.57 0.08 0.02 0.22 1.26 
9-Dec-21 0.0 32,210 0.57 0.08 0.02 0.22 1.26 
10-Dec-21 0.0 32,210 0.57 0.08 0.02 0.22 1.26 
11-Dec-21 0.0 32,210 0.57 0.08 0.02 0.22 1.26 
12-Dec-21 0.0 32,210 0.57 0.08 0.02 0.22 1.26 
13-Dec-21 0.0 32,210 0.57 0.08 0.02 0.22 1.26 
14-Dec-21 0.0 32,210 0.57 0.08 0.02 0.22 1.26 
15-Dec-21 0.0 32,210 0.57 0.08 0.02 0.22 1.26 
16-Dec-21 0.0 32,210 0.57 0.08 0.02 0.22 1.26 
17-Dec-21 0.0 32,210 0.57 0.08 0.02 0.22 1.26 
18-Dec-21 0.0 32,210 0.57 0.08 0.02 0.22 1.26 
19-Dec-21 258.3 32,468 0.57 0.08 0.02 0.23 1.27 
20-Dec-21 20.4 32,489 0.57 0.08 0.02 0.23 1.27 
21-Dec-21 0.0 32,489 0.57 0.08 0.02 0.23 1.27 
22-Dec-21 0.0 32,489 0.57 0.08 0.02 0.23 1.27 
23-Dec-21 392.0 32,881 0.58 0.08 0.02 0.23 1.28 
24-Dec-21 0.0 32,881 0.58 0.08 0.02 0.23 1.28 
25-Dec-21 42.5 32,745 0.58 0.08 0.02 0.23 1.28 
26-Dec-21 0.0 32,484 0.57 0.08 0.02 0.23 1.27 
27-Dec-21 0.0 32,484 0.57 0.08 0.02 0.23 1.27 
28-Dec-21 0.0 32,484 0.57 0.08 0.02 0.23 1.27 
29-Dec-21 0.0 32,484 0.57 0.08 0.02 0.23 1.27 
30-Dec-21 0.0 32,484 0.57 0.08 0.02 0.23 1.27 
31-Dec-21 0.0 32,484 0.57 0.08 0.02 0.23 1.27 
Note: 1) The gas meter has been sent back to manufacturer due to a failure as of 1/15/97. Reinstalled 3/18/97. 
1) Daily Gas Flare = Daily Gas Production - Daily gas to Boilers (adjusted - see report text)

MWRA Deer Island Power Plant Monthly Report 
Dec-21 
ZURNS Boilers, Units 101 & 201 
365-Rolling Total 
Day No. 2 Oil D. G. Hours PM VOC 
kgal kscf Operating tpy tpy 
30-Nov-21 3.208 3235 8,733.5 2.539 1.453 
01-Dec-21 1.704 3443 8,733.8 2.538 1.452 
02-Dec-21 0.000 3927 8,733.8 2.536 1.451 
03-Dec-21 0.000 4936 8,733.8 2.536 1.451 
04-Dec-21 0.000 4942 8,733.8 2.537 1.452 
05-Dec-21 0.000 4648 8,733.8 2.538 1.452 
06-Dec-21 0.000 4149 8,733.8 2.537 1.452 
07-Dec-21 0.000 4012 8,733.8 2.535 1.450 
08-Dec-21 0.000 4937 8,733.8 2.535 1.451 
09-Dec-21 0.000 4033 8,733.8 2.535 1.451 
10-Dec-21 0.000 4045 8,733.5 2.535 1.451 
11-Dec-21 0.000 4650 8,733.5 2.534 1.451 
12-Dec-21 0.000 4628 8,733.5 2.534 1.451 
13-Dec-21 0.000 4988 8,733.5 2.533 1.450 
14-Dec-21 0.000 4302 8,733.5 2.533 1.450 
15-Dec-21 2.423 3693 8,733.5 2.532 1.450 
16-Dec-21 0.755 3784 8,733.5 2.532 1.450 
17-Dec-21 0.751 4401 8,733.5 2.532 1.450 
18-Dec-21 0.668 4467 8,733.5 2.533 1.450 
19-Dec-21 0.000 5268 8,733.5 2.534 1.451 
20-Dec-21 0.000 5346 8,733.5 2.535 1.452 
21-Dec-21 2.639 3938 8,733.5 2.535 1.452 
22-Dec-21 0.725 4350 8,733.5 2.536 1.452 
23-Dec-21 1.972 4184 8,733.5 2.537 1.453 
24-Dec-21 0.000 4898 8,733.5 2.538 1.453 
25-Dec-21 1.010 4478 8,733.5 2.536 1.452 
26-Dec-21 0.333 4556 8,733.5 2.535 1.451 
27-Dec-21 0.789 4456 8,733.5 2.535 1.452 
28-Dec-21 2.875 3757 8,733.5 2.535 1.452 
29-Dec-21 1.817 3810 8,733.5 2.536 1.452 
30-Dec-21 2.320 3732 8,733.5 2.536 1.452 
31-Dec-21 0.000 4517 8,733.5 2.536 1.452

Date: Jan 05 2022
Time: 11:15
MWRA
Deer Island, MA 
Page 1 of 1 
Begin: Dec 01, 2021 00:00
End: Dec 31, 2021 23:59 
**"* MUL Tl-PARAMETER SUMMARY REPORT***** 
365 Day Emissions - Combined Boilers
Start 365 Day 365 Day
Total Total
S02 NOX 
tons tons 
-------- --------- --------- 
12/01/21 2.04255 13.08965
12/02/21 2.02939 13.06383
12/03/21 2.02159 13.04996
12/04/21 2.01949 13.04798
12/05/21 2.00776 13.04026
12/06/21 1.99682 13.01999
12/07/21 1. 98849 12. 99646
12/08/21 1.98579 12.98813
12/09/21 1.98560 12.95640
12/10/21 1.98539 12.94043
12/11/21 1.98350 12.91931
12/12/21 1. 98328 12.90738
12/13/21 1. 96563 12.88788
12/14/21 1.95786 12.87212
12/15/21 1.95751 12.85418
12/16/21 1.93711 12.82613
12/17/21 1. 92801 12.80107
12/18/21 1.92517 12.78864
12/19/21 1.90392 12.78574
12/20/21 1.88933 12.78490
12/21/21 1.88797 12.79582
12/22/21 1.88404 12.78146
12/23/21 1.88284 12.78571
12/24/21 1.88224 12.78448
12/25/21 1.88210 12.77978
12/26/21 1.88204 12.76104
12/27/21 1.87822 12.74825
12/28/21 1.85619 12.73972
12/29/21 1.83791 12.72299
12/30/21 1.83407 12.71407
12/31/21 1.83341 12.68976 
-------- --------- --------- 
Report produced by Cirrus 
365 Day 365 Day
Total Total 
co HI 
tons rnmBtu 
--------- --------- 
0.82574 998939.750
0.82498 998189.125
0.82496 998319.250
0.82549 998845.625
0.82559 999054.250
0.82814 998671.250
0.82806 997875.063
0.82698 998126.250
0.82681 997838.813
0.82524 997694.625
0.83108 997464.938
0.83198 997457.563
0.83170 997048.188
0.83117 996784.688
0.83118 996681.625
0.83319 996496.500
0.82966 996445. 438
0.82965 996536.813
0.82974 997036.813
0.82987 997470.625
0.82499 997630.875
0.82431 997881.938
0.82975 998187. 688
0.82849 998414.563
0.82963 997968.375
0.82730 997364.125
0.82505 997538.813
0.82438 997453.188
0.82409 997454.938
0.82008 997431.188
0.81799 997388.813 
--------- --------- 
DAS S/N (00000001) 
1/5/2022

1/19/2022, 12:50 PM 
Month-Year 
# Exceedances
(>1.0 ppmv TRS) Notes 
Tons 
12-Month Rolling
Total Tons 
12-Month Rolling
Total 
Jan-21 0.000 0.004 0.009 0.118 0 
Feb-21 0.000 0.004 0.008 0.118 0 
Mar-21 0.000 0.004 0.020 0.129 0 
Apr-21 0.000 0.004 0.009 0.129 0 
May-21 0.000 0.004 0.009 0.129 0 
Jun-21 0.000 0.004 0.009 0.125 0 
Jul-21 0.000 0.004 0.013 0.127 0 
Aug-21 0.000 0.004 0.009 0.126 0 
Sep-21 0.000 0.004 0.009 0.125 0 
Oct-21 0.002 0.006 0.020 0.136 0 
Nov-21 0.000 0.006 0.009 0.136 0 
Dec-21 0.000 0.006 0.009 0.136 0 
Emissions Limitations: 0.040 0.230 0.800 5.400 1.0 ppmv TRS 
Current Detection Limits, ppm v: 0.01 0.20 
Massachusetts Water Resources Authority
Deer Island Treatment Plant 
Pumping Odor Control (CP102) - Stack # 1
DEP Conditional Permit No: MBR-91-IND-007A 
Total Reduced Sulfur (TRS) 
Total Non-Methane
Hydrocarbons (TNMHC)

1/19/2022, 12:50 PM 
Month-Year 
# Exceedances
(>1.0 ppmv TRS) Notes 
Tons 
12-Month Rolling
Total Tons 
12-Month Rolling
Total 
Jan-21 0.003 0.043 0.076 1.246 0 
Feb-21 0.003 0.043 0.068 1.246 0 
Mar-21 0.003 0.042 0.089 1.250 0 
Apr-21 0.003 0.042 0.076 1.256 0 
May-21 0.003 0.042 0.090 1.271 0 
Jun-21 0.003 0.041 0.093 1.240 0 
Jul-21 0.003 0.038 0.107 1.213 0 
Aug-21 0.003 0.037 0.112 1.153 0 
Sep-21 0.003 0.037 0.094 1.122 0 
Oct-21 0.003 0.034 0.100 1.083 0 
Nov-21 0.003 0.034 0.081 1.065 0 
Dec-21 0.003 0.035 0.083 1.069 0 
Emissions Limitations: 0.500 4.000 5.600 34.000 1.0 ppmv TRS 
Current Detection Limits, ppm v: 0.01 0.20 
Total Reduced Sulfur (TRS) 
Total Non-Methane
Hydrocarbons (TNMHC) 
Massachusetts Water Resources Authority
Deer Island Treatment Plant 
Primary A-D, East/West Grit Odor Control (CP103) - Stack # 2 &
3 DEP Conditional Permit No: MBR-91-IND-007B

1/19/2022, 12:50 PM 
Month-Year 
# Exceedances
(>1.0 ppmv TRS) Notes 
Tons 
12-Month Rolling
Total Tons 
12-Month Rolling
Total Tons 
12-Month Rolling
Total 
Jan-21 0.002 0.036 0.047 0.662 0.024 0.279 0 
Feb-21 0.002 0.036 0.043 0.661 0.021 0.278 0 
Mar-21 0.002 0.036 0.047 0.662 0.024 0.279 0 
Apr-21 0.002 0.036 0.046 0.662 0.023 0.279 0 
May-21 0.002 0.036 0.058 0.672 0.024 0.279 0 
Jun-21 0.002 0.035 0.051 0.668 0.023 0.279 0 
Jul-21 0.002 0.032 0.085 0.693 0.024 0.279 0 
Aug-21 0.002 0.028 0.069 0.687 0.024 0.279 0 
Sep-21 0.002 0.026 0.075 0.716 0.023 0.279 0 
Oct-21 0.002 0.023 0.051 0.666 0.024 0.278 0 
Nov-21 0.002 0.023 0.046 0.666 0.023 0.278 0 
Dec-21 0.002 0.023 0.047 0.666 0.024 0.278 0 
Emissions Limitations: 0.250 2.000 3.800 23.300 verify <1 tpy 1.0 ppmv TRS 
Current Detection Limits, ppm v: 0.01 0.20 0.25 
Massachusetts Water Resources Authority
Deer Island Treatment Plant 
Primary Residuals Odor Control (CP301) - Stack # 4 and Secondary Residuals Odor Control (CP303) - Stack #
4 DEP Conditional Permit No: MBR-91-IND-007C and MBR-91-IND-007D 
Total Reduced Sulfur (TRS) 
Total Non-Methane
Hydrocarbons (TNMHC) Ammonia (NH3)

1/19/2022, 12:50 PM 
Month-Year 
# Exceedances
(>1.0 ppmv TRS) Notes 
Tons 
12-Month Rolling
Total Tons 
12-Month Rolling
Total 
Jan-21 0.000 0.005 0.012 0.166 0 
Feb-21 0.000 0.005 0.010 0.166 0 
Mar-21 0.000 0.005 0.012 0.166 0 
Apr-21 0.000 0.005 0.011 0.166 0 
May-21 0.000 0.005 0.012 0.166 0 
Jun-21 0.000 0.005 0.014 0.166 0 
Jul-21 0.000 0.005 0.014 0.163 0 
Aug-21 0.000 0.005 0.017 0.157 0 
Sep-21 0.000 0.005 0.011 0.157 0 
Oct-21 0.000 0.005 0.012 0.148 0 
Nov-21 0.000 0.005 0.011 0.148 0 
Dec-21 0.000 0.005 0.012 0.148 0 
Emissions Limitations: 0.1250 1.0000 0.3600 2.2000 1.0 ppmv TRS 
Current Detection Limits, ppm v: 0.01 0.20 
Total Reduced Sulfur (TRS) 
Total Non-Methane
Hydrocarbons (TNMHC) 
Massachusetts Water Resources Authority
Deer Island Treatment Plant 
Secondary Odor Control (CP202) - Stack # 5
DEP Conditional Permit No: MBR-92-IND-056

1/17/2023 / CTGs 
MWRA Deer Island Power Plant Monthly Report From: 01-Dec-22 
CTG 1 and CTG 2 To: 31-Dec-22 
365-DAY ROLLING TOTAL (Both Units Combined) 
EMISSIONS, TONS 
Daily 
DAY Daily Fuel Fuel 
Hours gal Hours gal NOx PM VOC CO SO2 
1-Dec-22 0.00 0 53.9 56,439 0.453 0.081 0.005 0.084 0.003 
2-Dec-22 0.00 0 53.9 56,439 0.453 0.081 0.005 0.084 0.003 
3-Dec-22 0.00 0 53.9 56,439 0.453 0.081 0.005 0.084 0.003 
4-Dec-22 0.00 0 53.9 56,439 0.453 0.081 0.005 0.084 0.003 
5-Dec-22 0.00 0 53.9 56,439 0.453 0.081 0.005 0.084 0.003 
6-Dec-22 0.00 0 53.9 56,439 0.453 0.081 0.005 0.084 0.003 
7-Dec-22 1.81 2,162 55.7 58,601 0.471 0.084 0.005 0.087 0.003 
8-Dec-22 0.00 0 53.9 56,586 0.454 0.081 0.005 0.084 0.003 
9-Dec-22 0.00 0 53.9 56,586 0.454 0.081 0.005 0.084 0.003 
10-Dec-22 0.00 0 53.9 56,586 0.454 0.081 0.005 0.084 0.003 
11-Dec-22 0.00 0 53.9 56,586 0.454 0.081 0.005 0.084 0.003 
12-Dec-22 0.00 0 53.9 56,586 0.454 0.081 0.005 0.084 0.003 
13-Dec-22 0.00 0 53.9 56,586 0.454 0.081 0.005 0.084 0.003 
14-Dec-22 0.00 0 53.9 56,586 0.454 0.081 0.005 0.084 0.003 
15-Dec-22 0.00 0 53.9 56,586 0.454 0.081 0.005 0.084 0.003 
16-Dec-22 0.81 903 54.7 57,489 0.461 0.082 0.005 0.086 0.003 
17-Dec-22 0.00 0 53.7 56,354 0.452 0.081 0.005 0.084 0.003 
18-Dec-22 0.00 0 53.7 56,354 0.452 0.081 0.005 0.084 0.003 
19-Dec-22 0.00 0 53.7 56,354 0.452 0.081 0.005 0.084 0.003 
20-Dec-22 0.00 0 53.7 56,354 0.452 0.081 0.005 0.084 0.003 
21-Dec-22 0.00 0 53.7 56,354 0.452 0.081 0.005 0.084 0.003 
22-Dec-22 0.00 0 53.7 56,354 0.452 0.081 0.005 0.084 0.003 
23-Dec-22 0.00 0 53.7 56,354 0.452 0.081 0.005 0.084 0.003 
24-Dec-22 3.19 3,776 56.9 60,130 0.483 0.085 0.005 0.089 0.003 
25-Dec-22 0.00 0 56.9 60,130 0.483 0.085 0.005 0.089 0.003 
26-Dec-22 0.00 0 56.9 60,130 0.483 0.085 0.005 0.089 0.003 
27-Dec-22 0.00 0 56.9 60,130 0.483 0.085 0.005 0.089 0.003 
28-Dec-22 0.00 0 56.9 60,130 0.483 0.085 0.005 0.089 0.003 
29-Dec-22 0.00 0 56.9 60,130 0.483 0.085 0.005 0.089 0.003 
30-Dec-22 0.00 0 56.9 60,130 0.483 0.085 0.005 0.089 0.003 
31-Dec-22 0.00 0 56.9 60,130 0.483 0.085 0.005 0.089 0.003 
3,881,000 61.4 10.3 2.0 17.0 13.8 Permit Limits - 12 month rolling average

1/ 17/ 2023 /FLAR ES 
Massachusetts Water Resources Authority 
Deer Island Power Plant Monthly Report 
CP-301 GAS FLARES 
Dec-22 
GAS 365 DAY Rolling 365 Day 
DAY FLARE TOTAL NOx PM VOC CO SO2 
kscf kscf tpy tpy tpy tpy tpy 
30-Nov-22 0.0 26,490 0.47 0.07 0.02 0.18 1.03 
1-Dec-22 0.0 26,490 0.47 0.07 0.02 0.18 1.03 
2-Dec-22 0.0 26,490 0.47 0.07 0.02 0.18 1.03 
3-Dec-22 0.0 26,490 0.47 0.07 0.02 0.18 1.03 
4-Dec-22 0.0 26,490 0.47 0.07 0.02 0.18 1.03 
5-Dec-22 0.0 26,490 0.47 0.07 0.02 0.18 1.03 
6-Dec-22 0.0 26,490 0.47 0.07 0.02 0.18 1.03 
7-Dec-22 0.0 26,490 0.47 0.07 0.02 0.18 1.03 
8-Dec-22 0.0 26,490 0.47 0.07 0.02 0.18 1.03 
9-Dec-22 0.0 26,490 0.47 0.07 0.02 0.18 1.03 
10-Dec-22 0.0 26,490 0.47 0.07 0.02 0.18 1.03 
11-Dec-22 0.0 26,490 0.47 0.07 0.02 0.18 1.03 
12-Dec-22 0.0 26,490 0.47 0.07 0.02 0.18 1.03 
13-Dec-22 0.0 26,490 0.47 0.07 0.02 0.18 1.03 
14-Dec-22 0.0 26,490 0.47 0.07 0.02 0.18 1.03 
15-Dec-22 0.0 26,490 0.47 0.07 0.02 0.18 1.03 
16-Dec-22 0.0 26,490 0.47 0.07 0.02 0.18 1.03 
17-Dec-22 0.0 26,490 0.47 0.07 0.02 0.18 1.03 
18-Dec-22 0.0 26,490 0.47 0.07 0.02 0.18 1.03 
19-Dec-22 0.0 26,232 0.46 0.07 0.02 0.18 1.02 
20-Dec-22 0.0 26,212 0.46 0.07 0.02 0.18 1.02 
21-Dec-22 0.0 26,212 0.46 0.07 0.02 0.18 1.02 
22-Dec-22 0.0 26,212 0.46 0.07 0.02 0.18 1.02 
23-Dec-22 0.0 25,820 0.45 0.06 0.02 0.18 1.01 
24-Dec-22 0.0 25,820 0.45 0.06 0.02 0.18 1.01 
25-Dec-22 0.0 25,777 0.45 0.06 0.02 0.18 1.01 
26-Dec-22 0.0 25,777 0.45 0.06 0.02 0.18 1.01 
27-Dec-22 0.0 25,777 0.45 0.06 0.02 0.18 1.01 
28-Dec-22 0.0 25,777 0.45 0.06 0.02 0.18 1.01 
29-Dec-22 0.0 25,777 0.45 0.06 0.02 0.18 1.01 
30-Dec-22 0.0 25,777 0.45 0.06 0.02 0.18 1.01 
31-Dec-22 0.0 25,777 0.45 0.06 0.02 0.18 1.01 
Note: 1) The gas meter has been sent back to manufacturer due to a failure as of 1/15/97. Reinstalled 3/18/97. 
1) Daily Gas Flare = Daily Gas Production - Daily gas to Boilers (adjusted - see report text)

MWRA Deer Island Power Plant Monthly Report 
Dec-22 
ZURNS Boilers, Units 101 & 201 
365-Rolling Total 
Day No. 2 Oil D. G. Hours PM VOC 
kgal kscf Operating tpy tpy 
30-Nov-22 0.000 4153 8,784.8 2.505 1.420 
01-Dec-22 1.726 4257 8,784.8 2.506 1.420 
02-Dec-22 1.551 4696 8,786.0 2.508 1.421 
03-Dec-22 0.000 4478 8,786.0 2.507 1.421 
04-Dec-22 0.000 4609 8,786.0 2.507 1.420 
05-Dec-22 0.132 4510 8,786.8 2.507 1.420 
06-Dec-22 1.834 3899 8,789.8 2.507 1.420 
07-Dec-22 0.470 4090 8,792.5 2.507 1.420 
08-Dec-22 0.000 4728 8,792.5 2.507 1.420 
09-Dec-22 1.589 4431 8,796.3 2.508 1.420 
10-Dec-22 3.095 3897 8,796.3 2.508 1.420 
11-Dec-22 1.201 4293 8,796.3 2.508 1.420 
12-Dec-22 0.000 4427 8,795.5 2.508 1.420 
13-Dec-22 1.940 3970 8,795.5 2.507 1.419 
14-Dec-22 3.460 3310 8,795.5 2.506 1.418 
15-Dec-22 3.689 2747 8,795.5 2.505 1.417 
16-Dec-22 1.733 3321 8,798.5 2.504 1.416 
17-Dec-22 0.000 4498 8,798.5 2.504 1.416 
18-Dec-22 0.000 4796 8,798.5 2.505 1.417 
19-Dec-22 0.368 4631 8,802.3 2.504 1.416 
20-Dec-22 0.396 4187 8,802.3 2.502 1.415 
21-Dec-22 0.000 4629 8,802.3 2.502 1.416 
22-Dec-22 0.753 4129 8,802.3 2.502 1.416 
23-Dec-22 2.281 3883 8,802.3 2.502 1.415 
24-Dec-22 1.612 4425 8,802.3 2.501 1.415 
25-Dec-22 2.873 3623 8,802.3 2.501 1.414 
26-Dec-22 1.582 4295 8,802.3 2.500 1.414 
27-Dec-22 0.041 5165 8,802.3 2.501 1.414 
28-Dec-22 2.135 4003 8,802.3 2.502 1.415 
29-Dec-22 3.182 3449 8,802.3 2.501 1.414 
30-Dec-22 3.158 3074 8,802.3 2.501 1.414 
31-Dec-22 3.145 3336 8,802.3 2.500 1.413

Date: Jan 06 2023
Time: 08:55
MWRA
Deer Island, MA 
Page I of I 
Begin: Dec 01, 2022 00:00
End: Dec 31, 2022 23:59 
••••• MULTl-PARAMETER SUMMARY REPORT••••• 
365 Day Emissions - Boiler 201
Start 365 Day
Total
S02
tons 
-------- --------- 
12/01/22 1. 36771
12/02/22 1.36785
12/03/22 1.36785
12/04/22 1.36785
12/05/22 1.36788
12/06/22 1.36894
12/07/22 1.36979
12/08/22 1.36979
12/09/22 1. 37052
12/10/22 1.37052
12/11/22 1.37052
12/12/22 1.37052
12/13/22 1.37052
12/14/22 1.37052
12/15/22 1.37052
12/16/22 1.37062
12/17/22 1.37062
12/18/22 1. 37062
12/19/22 1. 37142
12/20/22 1. 37142
12/21/22 1. 37142
12/22/22 1.37142
12/23/22 1.37142
12/24/22 1.37142
12/25/22 1.37142
12/26/22 1.37142
12/27 /22 1.37142
12/28/22 1.37142
12/29/22 1.37142
12/30/22 1.37142
12/31/22 1. 37142 
-------- --------- 
Report produced by Cirrus 
365 Day
Total 
NOX 
tons 
--------- 
6.43559
6.43691
6.43691
6.43691
6.43742
6.44005
6.44283
6.44283
6.44730
6.44730
6.44730
6.44730
6.44730
6.44730
6.44730
6.44840
6.44840
6.44840
6.45100
6.45100
6.45100
6.45100
6.45100
6.45100
6.45100
6.45100
6.45100
6.45100
6.45100
6.45100
6.45100 
--------- 
365 Day 365 Day
Total Total 
co HI 
tons rnmBtu 
--------- --------- 
0.29314 450159.375
0.29797 450187.844
0.29797 450187.844
0.29797 450187.844
0.29984 450205.781
0.31263 450276.750
0.32505 450340,656
0.32505 450340.656
0.34122 450431.406
0.34122 450431.406
0.34122 450431.406
0.34122 450431.406
0.34122 450431.406
0.34122 450431.406
0.34122 450431.406
0.34563 450453.844
0.34563 450453.844
0.34563 450453.844
0.35740 450504.031
0.35740 450504.031
0.35740 450504.031
0.35740 450504.031
0.35740 450504.031
0.35740 450504.031
0.35740 450504.031
0.35740 450504.031
0.35740 450504.031
0.35740 450504.031
0.35740 450504.031
0.35740 450504.031
0.35740 450504.031 
--------- --------- 
DAS S/N (00000001) 
1/6/2023

1/24/2023, 9:12 AM 
Month-Year 
# Exceedances
(>1.0 ppmv TRS) Notes 
Tons 
12-Month Rolling
Total Tons 
12-Month Rolling
Total 
Jan-22 0.000 0.006 0.009 0.136 0 
Feb-22 0.000 0.006 0.009 0.136 0 
Mar-22 0.000 0.006 0.009 0.125 0 
Apr-22 0.000 0.006 0.011 0.126 0 
May-22 0.000 0.006 0.009 0.126 0 
Jun-22 0.000 0.006 0.017 0.135 0 
Jul-22 0.000 0.006 0.012 0.134 0 
Aug-22 0.000 0.006 0.010 0.134 0 
Sep-22 0.000 0.006 0.009 0.134 0 
Oct-22 0.000 0.004 0.009 0.124 0 
Nov-22 0.000 0.005 0.009 0.124 0 
Dec-22 0.000 0.005 0.009 0.124 0 
Emissions Limitations: 0.040 0.230 0.800 5.400 1.0 ppmv TRS 
Current Detection Limits, ppm v: 0.01 0.20 
Massachusetts Water Resources Authority 
Deer Island Treatment Plant 
Pumping Odor Control (CP102) - Stack # 1
DEP Conditional Permit No: MBR-91-IND-007A 
Total Reduced Sulfur (TRS) 
Total Non-Methane
Hydrocarbons (TNMHC)

1/24/2023, 9:12 AM 
Month-Year 
# Exceedances
(>1.0 ppmv TRS) Notes 
Tons 
12-Month Rolling
Total Tons 
12-Month Rolling
Total 
Jan-22 0.003 0.035 0.073 1.066 0 
Feb-22 0.003 0.035 0.066 1.064 0 
Mar-22 0.003 0.034 0.078 1.052 0 
Apr-22 0.003 0.034 0.072 1.048 0 
May-22 0.003 0.034 0.094 1.053 0 
Jun-22 0.004 0.036 0.118 1.077 0 
Jul-22 0.004 0.037 0.073 1.043 0 
Aug-22 0.013 0.048 0.121 1.052 0 
Sep-22 0.007 0.051 0.106 1.063 0 
Oct-22 0.004 0.052 0.097 1.060 0 
Nov-22 0.004 0.053 0.108 1.088 0 
Dec-22 0.003 0.053 0.078 1.082 0 
Emissions Limitations: 0.500 4.000 5.600 34.000 1.0 ppmv TRS 
Current Detection Limits, ppm v: 0.01 0.20 
Total Reduced Sulfur (TRS) 
Total Non-Methane
Hydrocarbons (TNMHC) 
Massachusetts Water Resources Authority
Deer Island Treatment Plant 
Primary A-D, East/West Grit Odor Control (CP103) - Stack # 2 & 3 
DEP Conditional Permit No: MBR-91-IND-007B

1/24/2023, 9:12 AM 
Month-Year 
# Exceedances
(>1.0 ppmv TRS) Notes 
Tons 
12-Month Rolling
Total Tons 
12-Month Rolling
Total Tons 
12-Month Rolling
Total 
Jan-22 0.002 0.023 0.047 0.666 0.024 0.278 0 
Feb-22 0.002 0.023 0.044 0.667 0.021 0.278 0 
Mar-22 0.002 0.023 0.047 0.667 0.024 0.278 0 
Apr-22 0.002 0.023 0.048 0.670 0.023 0.278 0 
May-22 0.002 0.023 0.047 0.660 0.024 0.278 0 
Jun-22 0.002 0.023 0.056 0.664 0.023 0.278 0 
Jul-22 0.002 0.023 0.082 0.661 0.024 0.278 0 
Aug-22 0.005 0.026 0.114 0.706 0.024 0.278 0 
Sep-22 0.002 0.026 0.075 0.706 0.023 0.278 0 
Oct-22 0.002 0.027 0.059 0.713 0.024 0.278 0 
Nov-22 0.002 0.027 0.051 0.718 0.023 0.278 0 
Dec-22 0.002 0.027 0.047 0.718 0.023 0.278 0 
Emissions Limitations: 0.250 2.000 3.800 23.300 verify <1 tpy 1.0 ppmv TRS 
Current Detection Limits, ppm v: 0.01 0.20 0.25 
Massachusetts Water Resources Authority
Deer Island Treatment Plant 
Primary Residuals Odor Control (CP301) - Stack # 4 and Secondary Residuals Odor Control (CP303) - Stack # 4 
DEP Conditional Permit No: MBR-91-IND-007C and MBR-91-IND-007D 
Total Reduced Sulfur (TRS) 
Total Non-Methane
Hydrocarbons (TNMHC) Ammonia (NH3)

1/24/2023, 9:12 AM 
Month-Year 
# Exceedances
(>1.0 ppmv TRS) Notes 
Tons 
12-Month Rolling
Total Tons 
12-Month Rolling
Total 
Jan-22 0.000 0.005 0.012 0.148 0 
Feb-22 0.000 0.005 0.010 0.148 0 
Mar-22 0.000 0.005 0.012 0.148 0 
Apr-22 0.000 0.005 0.011 0.148 0 
May-22 0.000 0.005 0.012 0.148 0 
Jun-22 0.000 0.005 0.011 0.145 0 
Jul-22 0.000 0.005 0.012 0.142 0 
Aug-22 0.000 0.005 0.012 0.136 0 
Sep-22 0.000 0.005 0.013 0.139 0 
Oct-22 0.000 0.005 0.013 0.140 0 
Nov-22 0.000 0.005 0.011 0.140 0 
Dec-22 0.000 0.005 0.012 0.140 0 
Emissions Limitations: 0.1250 1.0000 0.3600 2.2000 1.0 ppmv TRS 
Current Detection Limits, ppm v: 0.01 0.20 
Total Reduced Sulfur (TRS) 
Total Non-Methane
Hydrocarbons (TNMHC) 
Massachusetts Water Resources Authority
Deer Island Treatment Plant 
Secondary Odor Control (CP202) - Stack # 5
DEP Conditional Permit No: MBR-92-IND-056

MWRA Deer Island Power Plant Monthly Report From: 01-Dec-23
CTG 1 and CTG 2 To: 31-Dec-23
365-DAY ROLLING TOTAL (Both Units Combined)
EMISSIONS, TONS
Daily
DAY Daily Fuel Fuel
Hours gal Hours gal NOx PM VOC CO SO2
1-Dec-23 0.00 0 128.3 148,520 1.219 0.204 0.018 0.221 0.010 
2-Dec-23 0.00 0 128.3 148,520 1.219 0.204 0.018 0.221 0.010 
3-Dec-23 0.00 0 128.3 148,520 1.219 0.204 0.018 0.221 0.010 
4-Dec-23 0.00 0 128.3 148,520 1.219 0.204 0.018 0.221 0.010 
5-Dec-23 0.00 0 128.3 148,520 1.219 0.204 0.018 0.221 0.010 
6-Dec-23 0.00 0 128.3 148,520 1.219 0.204 0.018 0.221 0.010 
7-Dec-23 0.00 0 126.5 146,358 1.202 0.201 0.018 0.218 0.009 
8-Dec-23 0.00 0 126.5 146,358 1.202 0.201 0.018 0.218 0.009 
9-Dec-23 0.00 0 126.5 146,358 1.202 0.201 0.018 0.218 0.009 
10-Dec-23 0.00 0 126.5 146,358 1.202 0.201 0.018 0.218 0.009 
11-Dec-23 4.07 4,396 130.6 150,754 1.238 0.207 0.018 0.225 0.010 
12-Dec-23 0.00 0 130.6 150,754 1.238 0.207 0.018 0.225 0.010 
13-Dec-23 0.00 0 130.6 150,754 1.238 0.207 0.018 0.225 0.010 
14-Dec-23 0.00 0 130.6 150,754 1.238 0.207 0.018 0.225 0.010 
15-Dec-23 0.00 0 130.6 150,754 1.238 0.207 0.018 0.225 0.010 
16-Dec-23 0.00 0 129.8 149,851 1.230 0.206 0.018 0.223 0.010 
17-Dec-23 0.00 0 129.8 149,851 1.230 0.206 0.018 0.223 0.010 
18-Dec-23 5.71 7,636 135.5 157,487 1.294 0.216 0.020 0.235 0.010 
19-Dec-23 22.26 25,146 157.7 182,633 1.503 0.248 0.024 0.271 0.012 
20-Dec-23 0.00 0 157.7 182,633 1.503 0.248 0.024 0.271 0.012 
21-Dec-23 0.00 0 157.7 182,633 1.503 0.248 0.024 0.271 0.012 
22-Dec-23 0.00 0 157.7 182,633 1.503 0.248 0.024 0.271 0.012 
23-Dec-23 0.00 0 157.7 182,633 1.503 0.248 0.024 0.271 0.012 
24-Dec-23 0.00 0 154.5 178,857 1.472 0.243 0.023 0.266 0.011 
25-Dec-23 0.00 0 154.5 178,857 1.472 0.243 0.023 0.266 0.011 
26-Dec-23 0.00 0 154.5 178,857 1.472 0.243 0.023 0.266 0.011 
27-Dec-23 0.00 0 154.5 178,857 1.472 0.243 0.023 0.266 0.011 
28-Dec-23 0.00 0 154.5 178,857 1.472 0.243 0.023 0.266 0.011 
29-Dec-23 0.00 0 154.5 178,857 1.472 0.243 0.023 0.266 0.011 
30-Dec-23 0.00 0 154.5 178,857 1.472 0.243 0.023 0.266 0.011 
31-Dec-23 0.00 0 154.5 178,857 1.472 0.243 0.023 0.266 0.011 
3,881,000 61.4 10.3 2.0 17.0 13.8 Permit Limits - 12 month rolling average 
1/12/2024 / CTGs

Massachusetts Water Resources Authority
Deer Island Power Plant Monthly Report
CP-301 GAS FLARES
Dec-23
GAS 365 DAY Rolling 365 Day
DAY FLARE TOTAL NOx PM VOC CO SO2
kscf kscf tpy tpy tpy tpy tpy
30-Nov-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
1-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
2-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
3-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
4-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
5-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
6-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
7-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
8-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
9-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
10-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
11-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
12-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
13-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
14-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
15-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
16-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
17-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
18-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
19-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
20-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
21-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
22-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
23-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
24-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
25-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
26-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
27-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
28-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
29-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
30-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
31-Dec-23 0.0 22,205 0.39 0.06 0.02 0.15 0.87 
Note: 1) The gas meter has been sent back to manufacturer due to a failure as of 1/15/97. Reinstalled 3/18/97. 
1) Daily Gas Flare = Daily Gas Production - Daily gas to Boilers (adjusted - see report text) 
1/17/2024 / FLARES

MWRA Deer Island Power Plant Monthly Report
Dec-23
ZURNS Boilers, Units 101 & 201
365-Rolling Total
Day No. 2 Oil D. G. Hours PM VOC
kgal kscf Operating tpy tpy 
30-Nov-23 7.692 3876 8,800.3 2.531 1.470
01-Dec-23 2.334 3682 8,800.3 2.530 1.469
02-Dec-23 3.276 3685 8,799.0 2.529 1.468
03-Dec-23 2.825 4149 8,799.0 2.530 1.468
04-Dec-23 0.000 5207 8,799.0 2.530 1.468
05-Dec-23 0.000 5519 8,798.3 2.532 1.469
06-Dec-23 0.000 4977 8,795.3 2.533 1.470
07-Dec-23 0.000 4655 8,792.5 2.534 1.471
08-Dec-23 0.000 4364 8,792.5 2.533 1.471
09-Dec-23 0.000 4324 8,788.8 2.533 1.471
10-Dec-23 0.000 4696 8,788.8 2.533 1.471
11-Dec-23 0.000 4805 8,788.8 2.534 1.472
12-Dec-23 0.000 4693 8,789.5 2.534 1.472
13-Dec-23 0.000 5015 8,789.5 2.535 1.473
14-Dec-23 1.428 4130 8,789.5 2.536 1.474
15-Dec-23 0.184 4848 8,789.5 2.538 1.476
16-Dec-23 0.000 5124 8,786.5 2.541 1.477
17-Dec-23 0.000 4689 8,786.5 2.541 1.478
18-Dec-23 0.000 4480 8,786.5 2.541 1.477
19-Dec-23 0.000 4020 8,782.8 2.540 1.477
20-Dec-23 0.078 4505 8,782.8 2.540 1.477
21-Dec-23 2.679 4176 8,782.8 2.540 1.477
22-Dec-23 0.000 5400 8,782.8 2.542 1.478
23-Dec-23 0.000 4848 8,782.8 2.543 1.479
24-Dec-23 0.000 5139 8,782.8 2.543 1.479
25-Dec-23 1.421 4043 8,782.8 2.544 1.480
26-Dec-23 3.281 3525 8,782.8 2.543 1.479
27-Dec-23 1.244 3795 8,782.8 2.541 1.478
28-Dec-23 0.000 4284 8,782.8 2.541 1.478
29-Dec-23 0.000 4661 8,782.8 2.542 1.479
30-Dec-23 0.000 4808 8,782.8 2.544 1.481
31-Dec-23 0.000 4434 8,782.8 2.545 1.482

Date: Jan 10 2024
Time: 13:34
MWRA
Deer Island, MA 
Page 1 of 1 
Begin: Dec 01, 2023 00:00
End: Dec 31, 2023 23:59 
***** MUL Tl-PARAMETER SUMMARY REPORT***** 
365 Day Emissions - Combined Boilers
Start 365 Day 365 Day 365 Day 365 Day
Total Total Total Total
SO2 NOX co HI
tons tons tons mmBtu 
-------- --------- --------- --------- --------- 
12/01/23 2.50912 12.66471 0.71942 991068.375
12/02/23 2.50229 12.65706 0.71703 990688.375
12/03/23 2.49913 12.66363 0.71848 990872.438
12/04/23 2.49740 12.66329 0.72252 991235.875
12/05/23 2.49409 12.66551 0.72218 991831.750
12/06/23 2.49481 12.66250 0.70934 992237.875
12/07/23 2.48884 12.66338 0.69685 992517.375
12/08/23 2.48566 12.65681 0.69804 992296.188
12/09/23 2.48082 12.64044 0.68359 992015.250
12/10/23 2.47723 12.62215 0.68518 992079.750
12/11/23 2.47166 12.60808 0.68604 992227.563
12/12/23 2.46418 12.60425 0.68595 992389.250
12/13/23 2.45758 12.59672 0.68679 992760.250
12/14/23 2.45904 12.59152 0.68714 992981.625
12/15/23 2.46541 12.58509 0.68717 993781.563
12/16/23 2.46721 12.58369 0.68287 994641.625
12/17/23 2.46719 12.59850 0.68310 994757.750
12/18/23 2.46658 12.59551 0.68418 994565.375
12/19/23 2.46697 12.57768 0.67281 994144.188
12/20/23 2.46640 12.56014 0.67536 994294.063
12/21/23 2.46544 12.54970 0.67718 994383.250
12/22/23 2.46403 12.53600 0.68059 995053.750
12/23/23 2.46442 12.51545 0.67880 995330.000
12/24/23 2.46634 12.49076 0.67864 995545.313
12/25/23 2.46464 12.46790 0.67807 995603.250
12/26/23 2.45788 12.44769 0.67785 995366.125
12/27/23 2.45183 12.42606 0.67779 994696.625
12/28/23 2.45391 12.39197 0.67776 994576.875
12/29/23 2.45815 12.36670 0.67528 994881.125
12/30/23 2.46316 12.35314 0.67181 995505.625
12/31/23 2.46393 12.33643 0.67168 995745.438 
-------- --------- --------- --------- --------- 
Report p roduced b y Cirrus DAS S/N (00000001)

1/19/2024, 6:48 AM 
Month-Year 
# Exceedances
(>1.0 ppmv TRS) Notes 
Tons 
12-Month Rolling
Total Tons 
12-Month
Rolling Total 
Jan-23 0.000 0.005 0.009 0.124 0 
Feb-23 0.000 0.005 0.018 0.133 0 
Mar-23 0.000 0.005 0.009 0.133 0 
Apr-23 0.000 0.005 0.027 0.150 0 
May-23 0.000 0.005 0.027 0.167 0 
Jun-23 0.000 0.005 0.023 0.173 0 
Jul-23 0.000 0.005 0.057 0.218 0 
Aug-23 0.000 0.005 0.014 0.222 0 
Sep-23 0.000 0.005 0.034 0.247 0 
Oct-23 0.000 0.005 0.033 0.270 0 
Nov-23 0.001 0.005 0.012 0.274 0 
Dec-23 0.000 0.005 0.009 0.274 0 
Emissions Limitations: 0.040 0.230 0.800 5.400 1.0 ppmv TRS 
t Detection Limits, ppm v: 0.01 0.20 
Massachusetts Water Resources Authority
Deer Island Treatment Plant 
Pumping Odor Control (CP102) - Stack # 1
DEP Conditional Permit No: MBR-91-IND-007A 
Total Reduced Sulfur (TRS) 
Total Non-Methane
Hydrocarbons (TNMHC)

1/19/2024, 6:48 AM 
Month-Year 
# Exceedances
(>1.0 ppmv TRS) Notes 
Tons 
12-Month Rolling
Total Tons 
12-Month
Rolling Total 
Jan-23 0.003 0.053 0.076 1.085 0 
Feb-23 0.003 0.053 0.067 1.087 0 
Mar-23 0.003 0.053 0.076 1.085 0 
Apr-23 0.003 0.053 0.208 1.220 0 
May-23 0.003 0.053 0.192 1.318 0 
Jun-23 0.003 0.051 0.245 1.445 0 
Jul-23 0.003 0.050 0.437 1.809 0 
Aug-23 0.003 0.040 0.138 1.826 0 
Sep-23 0.003 0.036 0.278 1.999 0 
Oct-23 0.003 0.036 0.253 2.154 0 
Nov-23 0.003 0.035 0.114 2.160 0 
Dec-23 0.003 0.035 0.089 2.171 0 
Emissions Limitations: 0.500 4.000 5.600 34.000 1.0 ppmv TRS 
t Detection Limits, ppm v: 0.01 0.20 
Total Reduced Sulfur (TRS) 
Total Non-Methane
Hydrocarbons (TNMHC) 
Massachusetts Water Resources Authority
Deer Island Treatment Plant 
Primary A-D, East/West Grit Odor Control (CP103) - Stack # 2 & 3 
DEP Conditional Permit No: MBR-91-IND-007B

1/19/2024, 6:48 AM 
Month-Year 
# Exceedances
(>1.0 ppmv TRS) Notes 
Tons 
12-Month Rolling
Total Tons 
12-Month
Rolling Total Tons 
12-Month Rolling
Total 
Jan-23 0.002 0.027 0.047 0.718 0.024 0.278 0 
Feb-23 0.002 0.027 0.043 0.717 0.021 0.278 0 
Mar-23 0.002 0.027 0.047 0.717 0.024 0.278 0 
Apr-23 0.002 0.028 0.132 0.800 0.023 0.278 0 
May-23 0.002 0.028 0.163 0.916 0.024 0.278 0 
Jun-23 0.002 0.028 0.170 1.030 0.023 0.278 0 
Jul-23 0.002 0.028 0.298 1.246 0.024 0.278 0 
Aug-23 0.002 0.025 0.075 1.207 0.024 0.278 0 
Sep-23 0.002 0.024 0.181 1.313 0.023 0.278 0 
Oct-23 0.003 0.025 0.187 1.441 0.024 0.278 0 
Nov-23 0.003 0.025 0.046 1.436 0.023 0.278 0 
Dec-23 0.002 0.025 0.047 1.437 0.024 0.278 0 
Emissions Limitations: 0.250 2.000 3.800 23.300 verify <1 tpy 1.0 ppmv TRS 
Detection Limits, ppm v: 0.01 0.20 0.25 
Massachusetts Water Resources Authority
Deer Island Treatment Plant 
Primary Residuals Odor Control (CP301) - Stack # 4 and Secondary Residuals Odor Control (CP303) - Stack # 4 
DEP Conditional Permit No: MBR-91-IND-007C and MBR-91-IND-007D 
Total Reduced Sulfur (TRS) 
Total Non-Methane
Hydrocarbons (TNMHC) Ammonia (NH3)

1/19/2024, 6:48 AM 
Month-Year 
# Exceedances
(>1.0 ppmv TRS) Notes 
Tons 
12-Month Rolling
Total Tons 
12-Month Rolling
Total 
Jan-23 0.000 0.005 0.012 0.140 0 
Feb-23 0.000 0.005 0.010 0.140 0 
Mar-23 0.000 0.005 0.012 0.140 0 
Apr-23 0.000 0.005 0.028 0.157 0 
May-23 0.000 0.005 0.032 0.177 0 
Jun-23 0.000 0.005 0.037 0.203 0 
Jul-23 0.000 0.005 0.071 0.262 0 
Aug-23 0.000 0.005 0.032 0.282 0 
Sep-23 0.000 0.005 0.050 0.319 0 
Oct-23 0.000 0.005 0.039 0.344 0 
Nov-23 0.000 0.005 0.011 0.344 0 
Dec-23 0.000 0.005 0.012 0.344 0 
Emissions Limitations: 0.1250 1.0000 0.3600 2.2000 1.0 ppmv TRS 
Detection Limits, ppm v: 0.01 0.20 
Total Reduced Sulfur (TRS) 
Total Non-Methane
Hydrocarbons (TNMHC) 
Massachusetts Water Resources Authority
Deer Island Treatment Plant 
Secondary Odor Control (CP202) - Stack # 5
DEP Conditional Permit No: MBR-92-IND-056

Boston/Winthrop Fire Truck Responses_____ 
Date: City/Town: Reason for Responses: Area: 
1/1/2023 Boston/Winthrop Fire in Dumpster Winthrop Terminal 
1/5/2023 Winthrop Alarm in North Main North Main 
2/26/2023 Winthrop Alarm Maint Bldg 
3/24/2023 Boston/Winthrop Alarm Gravity Thickener 
4/4/2023 Winthrop Alarm Active/Smoke Detector Primary OPS 
5/5/2023 Boston/Winthrop/EMS Winthrop Turbine Incident Parking Lot 3 
6/23/2023 Winthrop/Ambulance Ill Employee 2nd Fl Maintenance 
7/17/2023 Boston/Winthrop Alarm Thermal 
7/21/2023 Winthrop Alarm Primary Cross Gallery 
12/15/2023 Boston/Winthrop Alarm Gravity Thickener 
12/25/2023 Winthrop Alarm Gravity Thickener 
2/26/2024 Boston/Winthrop Alarm Maintenance Bldg 
3/14/2024 Winthrop/EMS Ill Employee Maintnenance Bldg 
3/24/2024 Boston/Winthrop Alarm Gravity Thickener 
5/5/2024 Winthrop Alarm South Pump Facility 
5/7/2024 Boston/Winthrop/EMS Fire Notification Cryo Facility

Other: 
fire suppression released 
smoke in Maint Office Area 
Faulty Flow Switch 
Microwave casued smoke alarm 
Flow Switch 
Hot water steam set off beam detector 
Flow Switch 
Flow Switch 
Faulty Flow Switch 
Flow Switch 
Unknown 
Smoldering Insulation on cold box

Gate Logs 
Date Chemical Fuel Oil Warehouse Equipment (Const E Trash (Grit+Dumpster) 
5/20/2022 2 4 2 
5/23/2022 2 2 2 
12/6/2022 3 1 1 
12/7/2022 2 2 
12/8/2022 3 5 2 1 
12/9/2022 2 6 2 
3/20/2023 3 3 1 
3/27/2023 1 4 3 
3/28/2023 4 2 2 
3/30/2023 2 5 1 1 
3/31/2023 3 3 1 
8/7/2023 4 6 1 
8/15/2023 4 
8/17/2023 4 
3/20/2024 2 3 1 1

Total 
8 
6 
5 
4 
11 
10 
7 
8 
8 
9 
7 
11 
4 
4 
7

MWRA / Deer Island Treatment Plant 
Contract 6723 – Seawall Preliminary Design Report (PDR) Summary 
Main PDR 
Recommendation Table Summary 
Highlighted text shows priority repairs within next 3 years. 
Component Repair Option Cost Reference 
Seawall Repair 6 – remove 5” concrete in 
damaged areas, patch, 
protective coating & cathodic 
protection 
$21 M 2.3.5 
Pedestrian Railing 
Replacement 
2 – 42” aluminum railing $1.1 M 2.3.14 
Behind Wall Drainage 
System 
N/A – new 9”w x 5’d channel 
w/grating behind seawall 
$2 M (presented) 
$3.5M (shown in 
Cost estimate) 
Figure 2.3.6, Appendix 
F 7.2 
Revetment None made, but North
revetment should be 8 & 9.5
ton stone; is currently 4 &8 -
ton stone respectively. Could
be “Considered in the future” 
None listed Appendix C 4.1.3 
Stone Toe Protection
Apron (STPA) 
3 – reuse 2.5 ton armor stone
& re-lay at 10H:1V slope
w/new bedding at seawalls 
$16.2 M 2.4.1 and Appendix C
4.1.1 
Granite Blocks Appendix C: 5.2.1 Option 1 –
Mechanically fasten w/steel
dowel 
None listed 2.4.3 and Appendix C
5.2.1 Option 1 
Outfalls None recommended None listed 2.5.2 and Appendix A 
Beach Fill Enhance beaches fronting
seawalls as a “maintenance
item”. Not a formal
recommendation in this PDR. 
None listed 2.6.10 and Appendix E 
Dredging Limits of dredging would be for
slope modifications to Stone
Toe Protection Apron 
Not expressly
mentioned if
included in STPA
cost estimate 
2.7 and Appendix F 
Concrete Testing shows high chloride content to the lower half of the seawalls which is the cause for
much of the spalling and delamination. 
The recommended seawall repair option includes removing areas with high chloride content to a depth
of 5-inches and patching with a low slump high density concrete and adding a protective coating to the
entire exposed face. They also recommend a cathodic protection system to protect the steel – which is

not described within. Option 5 includes a similar approach but without the cathodic protection system
at a cost of $16.5 M, roughly $4.5 M less. They do not address repairing the already corroded rebar. 
The inspections indicated that much of the expansion joint material on the sidewalk and seawalls is
loose, separated, missing or damaged. Coupled with rain and wave overtopping, the water is
penetrating through the joints at the top of the wall and causing “V” shape spalls. They recommend
removing the loose material and replacing all expansion joint materials. A cost for this was not
provided. 
The inspection report also identified many cracks throughout the upper portion of the seawall. In these
areas, Green recommends chipping the areas to sound concrete and pressure injecting epoxy material.
The cost for the crack repair is included in certain seawall repair options. 
Surface runoff/flooding: Inspections determined that the drainage system was likely not designed to
handle surface runoff, as the top 3 feet of soils were low permeability soils (compacted glacial till). It is
because of that that after rain events the seawall sees high overland flow and flooding problems. The
recommendation is to create a separate drainage system to handle surface water consisting of a 9-inch
wide, 5-foot deep channel with grating behind the seawall and 6” PVC drain pipes spaced every 12-feet. 
Railings: Rail post holes are not grouted flush allowing sea water to sit at the base, which is causing the
posts to rust. The inspections also note a failed coating system and rail deterioration. The
recommendation is to install new 42-inch tall aluminum picket fence. 
The remainder of the PDR is summarized in the corresponding reports. It wasn’t summarized well in the
main PDR document and some alternatives are missing recommendations and cost estimates. 
Appendix A – Seawall and Stormwater Drainage Outfall Report 
This report documents seawall and drainage inspection procedures including access, and visual and
delamination (sounding) testing and includes photographs of specific areas of concern and detailed
sketches outlining locations and quantities of delamination, exposed and debonded reinforcing, spalling
etc. along each seawall and sidewalk. Generally: 
The CP-204 and CP-301 seawalls show delamination, spalls and debonded reinforcing from the
top of the footing up to about 8-ft. Many footing locations are either covered by the mudline or
exhibit scaling and abrasion. The expansion joint filler is missing at several locations; weep holes
for drainage are often blocked; top of wall locations at construction joints exhibit severe spalling
and delamination which is causing chunks of concrete to fall into the sea and tripping hazards on
the walkway. 
Many of the drainage outfalls are missing the rubber “duckbill” valves that were installed to prevent
tidal influence in the stormwater system. Additionally, many of the outfalls are mostly buried by sand
deposits, holding the duckbill valves closed and severely limiting the functionality of the stormwater
outfall.

Appendix B – Seawall Testing Reports 
The testing reports include the results of the chemical and physical testing of the concrete cores taken
from the seawalls where chloride content, compressive strength, aggregate size, grading, depth of
carbonation, water-to-cement ratio, and air content were analyzed. This was mainly to provide the “as
built” condition of the concrete as well as how deep the seawater influence has penetrated. 
Generally, the compressive strength of the concrete exceeded what was specified with the exception of
two of the twelve locations. The coarse aggregate size was consistently ¾” (min 0.5”, max 1”) and was
determined to be generally well graded. The depth of carbonation ranged from 0 to 1/4”. Water to
cement ratio ranged from 0.40 to 0.48 with approximately 8-11% unhydrated cement particles. Lastly,
half of the samples’ air void systems were not consistent with the current American Concrete Institute
(ACI) recommendations for freeze-thaw resistance. No trend between CP 204 or 301 seawall or location
of sample (top/middle/bottom of wall) was identified in this analysis. 
Appendix C – Seawall and Shoreline Assessment 
CP-043 Northeast Revetment: Generally looked good with minor toe stone displacement. Armor stone 
appeared stable. While there is a noticeable transition between the granite blocks (square cut vs rough
cut) at station 22+20, there was no distinguishable difference or transition between the 4-ton and 8-ton
revetments shown on the Record Drawings. There was minimal deterioration between 2021 inspections
and those performed in 2005. 
CP-204 Seawall: Showed no signs of settlement, undermining, wall rotation, or movement at 
expansion joints. The top of footing was consistently exposed and the wall stem was generally in poor
condition below El. 118 and fair condition above. Conditions have deteriorated significantly since 2005
inspections. Stone toe protection apron (STPA) in front of the wall had no discernable structure and
although didn’t appear to have changed significantly since the 2005 inspections and were noted to be in
poor condition. 
CP-301 Seawall: Showed no signs of settlement, undermining, wall rotation, or movement at 
expansion joints. The top of footing was consistently exposed and the wall stem as generally in poor
condition below El. 118 and fair condition above. Conditions have deteriorated significantly since 2005
inspections. Stone toe protection apron (STPA) in front of the wall showed considerable movement
worsened significantly since the 2005 inspections and were noted to be in poor condition. Lastly, at the
CP-204/301 transition, there is an area where the footing is undermined and the cut-off wall below the
footing is visible. 
CP-204 South Revetment: Generally in good condition with similar conditions as 2005 inspections. 
CP-048 Southwest Revetment: Generally in good condition with similar conditions as 2005 inspections. 
CP-048 West Revetment: Generally in good condition with moderate toe stone movement in a 
roughly 100-ft destabilized area. Generally similar conditions as 2005 inspections. 
A revetment analysis was performed to determine the weight of the armor stone required to properly
protect the shoreline. The results that the CP-043 Northern Revetment and the CP-304 Seawall’s armor
stones are significantly undersized for the current 100-year storm, with the CP-301 Seawall’s armor
stone being undersized for the future 2050, 100-year storm in addition to the other two systems.

The Northern portion of the CP-043 revetment should be overlaid with 8-ton stone while the southern
section of the CP-043 northern revetment should be overlaid with 10-ton stone to provide adequate
protection for future conditions. Although the report and the calculations repeatedly state this
revetment is undersized, no formal recommendation to upgrade this area was made, saying only it
“should be considered in the future”. 
For the seawall scour protection, both CP-301 and CP-204 seawalls can either be upgraded to 8-ton
armor stone at the current 1V:2H slope or 2.5 ton stone at 1V:6H slope or shallower to remain stable in
the 2050 100-year storm. The recommendation is to re-use the existing 2.5 ton armor stone and lay it at
a 1V:10H slope and underlay it with a 500-lb underlayer and 25-lb bedding layer. Keeping the scour
protection to the originally designed 23-feet out from the wall stem would classify this improvement as
scour protection apron maintenance and ease permitting. 
A global stability analysis was performed for both CP-301 and 204 seawalls. The results conclude that
the walls were adequately sized to prevent an overturning or bearing capacity failure for all cases
analyzed. For portions supported on piles, the pile loads are within the installed capacities. 
Granite Block Crest Lining: two options were presented to help reduce blocks’ movement during storms:
1) Mechanically fastening them with steel dowels and grout to the armor stone; and 2) Increasing the
grade behind the stone. No recommendation or price were provided, but it is assumed Option 1 would
be the accepted approach. 
Appendix D – Technical Memo on Wave Overtopping and Forcing 
This memo details how the Massachusetts Coast Flood Risk Model (MC-FRM) which was developed by
Woods Hole Group for the MassDOT and supplemented with DITP ground, LiDAR and bathymetric
survey was used to generate wave height, wave force, and water levels for current and future conditions
which were used in the evaluations presented above. The results indicate the current 100-year storm
water level to be 115.5-ft (MWRA datum) and future, 2050 100-year water level to raise to 118.1-ft. the
wave heights vary between the east (7-9.5-ft with a frequency of ~10.5 sec) and west side (3-4-ft with a
frequency of ~4 sec) in the current conditions. Those numbers increase to 8-11-ft (east) and 4.5-5.5-ft
(west) in the 2050 conditions. Frequency only increased slightly between current and future conditions. 
Modeling results confirmed the calculations in Appendix C indicating that the northeast revetment was
susceptible to damage with an overtopping rate of 0.54 cfs/lf and the CP-204 seawall was susceptible to
damage at an overtopping rate of 0.02 cfs/lf during future 2050 conditions. Note the scale for damage
to seawalls is different than that of revetments. 
Wave forces on the seawall were also calculated. These values are 35 and 55 kpis/foot in the current
day and future 2050 100-year storms, respectively. 
Appendix E – Technical Memo: Beach Study and Coastal Inspections 
This memo details the condition of the shoreline and how it has been affected since the construction of
the shoreline protection system at DITP. 
Based on available data, the shoreline was compared from years 1847-1978 and years 2001-2019 to
represent pre- and post- construction conditions. In the pre-construction conditions, the shoreline
remained relatively stable minus the northeast corner and a portion of the western side of the island

which were affected by the New England Hurricane of 1938. Post-construction, the shoreline has shown
to be stable, as expected given the shoreline protection deployed. Figure 3 contrasts shoreline
movement between these two periods. Yirrell Beach was noted to be showing an increased rate of
accretion, at 3.2 feet/year which can be attributed to active beach management activities. 
The study further investigated change in nearshore morphology (where sand is being deposited/eroded
in front of existing shoreline protection structures) between 2010 and 2021 using the topography and
bathymetry collected as part of this contract. This evaluation shows erosion of the northernmost end of
the northern revetment. On the seawalls, erosion is shown at the location of the tow stones with
deposition of the nearshore beaches. The southern revetment shows variability especially where the
shore-perpendicular structures exist, and the western revetment generally shows deposition which is
likely due to the curvature of the shoreline. 
Lastly, the memorandum modeled sediment transport in front of the seawalls during a 100-year storm
and whether beach nourishment (sand placement) would be beneficial. The beaches that front the
seawalls exhibit erosion during storms as evident by the exposed stone toe protection apron. The
model concludes that beach fill will provide a considerable reduction of exposure to the toe protection,
making it more resilient and reduces wave impacts on the seawall. Erosion during a 100-year storm
would reduce from 6-ft in front of the CP-204 seawall to 3.5-ft, and from 10-ft to 2-ft in front of the CP-
301 seawall. Beach nourishment could then routinely be added as a maintenance item for seawall
protection. 
No formal recommendations, quantities/size of sand, or cost estimate was provided in this
memorandum. 
Appendix F – Geotechnical and Hazardous Materials Report 
This memorandum outlines the procedures for conducting borings, groundwater and sediment sampling
and testing and provides background information on the environmental status of DITP. They noted that
a Class A-3 Response Action Outcome (RAO) was filed for the site in 2001 which included a Method 3
Risk Assessment was concluded with a condition of No Significant Risk with the implementation of an
Activity Use Limitation (AUL) on the 9 lots that comprise DITP (this project spans Lots 3, 4, and 6). The
AUL restricts future residential use and imposes soil management requirements during construction and
excavation activities. 
Soil Chemical Testing Results: TPH, EPH and metal were detected in the soil at limits above laboratory
reporting limits, however no contaminants were detected above the MCP RCS-1. 
Groundwater Chemical Testing Results: VOCs, SVOCs, metals and ammonia as Nitrogen were detected
at limits above laboratory reporting limits, however no contaminants were detected above the MCP
RCGW-2. 
Sediment Sampling Testing Results: EPH, SVOC’s and metals were detected above laboratory reporting
limits, however MCP RCS-1 standards only apply to soil and there are no reportable concentrations. 
All samples are consistent with concentrations previously identified and are not reportable under the
MCP.

Boring results indicated a thin layer of topsoil, followed by fill soils that were claey sand with gravel and
sandy lean clay with gravel and appeared to be re-worked glacial till. It was a medium-dense to very
dense soil with low permeability and poor compaction properties. 
Groundwater levels did not appear to be tidally influenced, but did appear to be influenced by rain
events. Additional explorations (geoprobes) were since performed to better understand the
groundwater behind the seawall and will be included in the updated report. 
The recommendations are for a rip-rap layer similar to what was installed in the northernmost 600-ft be
installed on the vegetated slope portion of the seawall adjacent to the disinfection tanks. The rip rap
layer should be installed a sufficient distance beyond the impact of breaking waves splashing over the
seawall, and a drainage system be installed on the backside of the wall (mentioned previously). This
drainage system would be independent of the groundwater/tides and be for storm related run-off only. 
No significant reportable contamination was identified the would impact the proposed construction. It
is likely that most excess soil would be acceptable at a less than RCS-1 fill site. RAM Plan and SMP are
requirements of the AUL. 
Given the low permeability of the soils, recharge of construction dewatering is not likely an option. On-
site treatment consisting of a fractionalization tank settling and removal of fine particles through a bag
filter system prior to discharge to the stormwater system is the most likely requirement. 
Sediment management in locations where dredging is proposed (slope for Stone Toe Protection) could
be reused as daily cover at a Massachusetts lined or unlined landfill. Areas with high conductivity (due
to high clay content) may require disposal at an out of state landfill for non-hazardous waste. 
Appendix G – Permit Evaluation Technical Memorandum 
This memorandum summarizes all regulatory reviews, permits, approvals, notifications and licenses,
together called “permits” that could potentially be applicable on this project based on the proposed
scope of work and describes why they are or are not relevant. It outlines permits by federal, state and
local agencies and documents a schedule for submittal date in both design and construction to keep the
project on track. The memorandum outlines six federal permits, ten state permits and one local permit
that may be required. 
Appendix H - Plans 
The Drawings are rough plans highlighting the areas for seawall repair, STPA repair and Granite block
anchoring. Very conceptual, even for a “30% submittal”. 
Appendix I – Cost Estimate 
The cost estimate contains worksheets for all options of the following recommendations: 
• Railing replacement 
• Seawall Repair 
• Behind wall drainage system. 
It does not include:

• Any new revetment (unclear if this is recommended) 
• STPA repair 
• Granite Blocks 
• Outfall rehab/replacement (unclear if this is recommended) 
• Beach fill (unclear if this is recommended) 
Appendix J – Flood Evaluation Study Memorandum 
This memorandum discusses the approach for developing the overtopping model for the DITP. Woods
Hole Group used the design water levels and wave conditions developed under other sections of the
PDR to supplement the MC-FRM (also discussed under other sections of the PDR, and developed for the
Mass DOT and supplemented by LiDAR and bathymetry obtained under this project) to model wave
overtopping and inundation. The results of the model indicated that while a majority of DITP is of high
elevation and protected by shore protection structures, the following areas would be impacted under
current conditions, during a 100-year storm: 
• Northeast Revetment (CP-043) and CP-204 seawall would experience flooding along the crest of
the walkway with no upland effects; 
• CP-301 Seawall would experience similar flooding along the walkway with additional flooding
along the southern portion inside the fence line – in proximity to the southernmost Digester
Module (Module 2). 
• Landward flooding to the western and southern revetment (CP-204 and CP-208) which would
affect the pier facility, westernmost portion of Parking Lot 3 inside the DITP fence line and
southernmost pedestrian walkways; 
• Flooding at the Tafts Ave entry to DITP, in the public parking area. 
Flooding in the above areas is limited to 1-ft or less. During the future 2050, 100-yr storm, impacted
areas are similar, with the following additions: 
• Tafts Ave is showing 3-4 feet of flooding at the entry way to DITP; 
• Pier facility is showing roughly 2-ft of flooding and flooding further into Parking Lot 3 inside the
DITP fence line 
• Flooding at R/T Building and around guard shack; 
• 1-2 feet of flooding along Deer Island Road around SSPS, and Road D between SSPS and the
Gravity Thickeners, and Road 9 in front of the Residuals OC Facility 
• 1-2 feet of flooding in the area of Digester Module 2 inside the DITP fence line. 
One thing to note is that Woods Hole Group used true 100-year storm elevations, as modeled by their
software. Our design criteria (and the storm surge map we developed internally) use historical 100-yr
storm +2.5-ft.