Consent Decree Semi Annual Report_September 2012
TO: The Honorable Mayor and City Council Members
FROM: Michael C. Van Milligen, City Manager
SUBJECT: Consent Decree Semiannual Report
DATE: August 29, 2012
City Engineer Gus Psihoyos is recommending submittal of the September 2012
Semiannual Report for the U.S. Environmental Protection Agency Consent Decree.
I concur with the recommendation and respectfully request Mayor and City Council
approval.
/ AAh kt1&1
Michael C. Van Milligen
MCVM:jh
Attachment
cc: Barry Lindahl, City Attorney
Cindy Steinhauser, Assistant City Manager
Teri Goodmann, Assistant City Manager
Gus Psihoyos, City Engineer
r»e `Emir E`
Dubuque
DUB E
aI -Amer l
Masterpiece on the Mississippi
1 I
I
I I I
2007
TO: Mike Van Milligan, City Manager
FROM: Gus Psihoyos, City Engineer
DATE: Al 2012
SUBJECT: Consent Decree Semiannual Report
INTRODUCFON
The purpose of this memo is to request authorization for the City Manager to sign the September 2012 Semiannual Report and to
seek approval to submit the document to the agencies stated In the Consent Decree.
BACKGROUND
The City of Dubuque, Iowa is under a Consent Decree according to Case 211 - up, -01001- EJM,United States of Americo and the
State of Iowa v. the City of Dubuque, IS IN D. Iowa), Civil Action Number 2008 W 0041, D0J Case Number 90 51 -1 -03139
affected June 27 2011 The purpose of report is to sassy Second VIII, Paragraph 25 of Consent Decree, which requires
the dry to submit semiannual report by September 30, 2012.
DISCUSSION
The purpose of semiannual report Into satisfy Section VIII Paragraph 25 of Consent Decree. Paragraph 25 requires the
City to submit semiannual reports by March 31 and September 30 after the Effective Date (June 27 2011). The report includes
summary information regarding events and acteines performed m the pear six months Therefore, the "reporting period" refers to
time between March 1,2012 and including August 31 , 2012
RECOMMENDATION
endthatthe City Council authorize the City Manager to fairly the September 2812 Semiannual Report and Engineering
stafto submit the document to the agencies stated In the Consent Decree.
PROJECFCOST- BUOGETIMPACF
The recommended actions do not Impact the City's budget
ACTION TO BE TAKEN
request that the City Council authorize the City Manager to fairly the September 2012 Semiannual Report and Engineering staff
to submit the document to the agencies stated in the Consent Decree.
Prepared by
Todd Shoemaker, Environmental Engineer
Barry Gndahl, City Attorney
Ban Vogt Pubocwarks Director
John Klostermann, Street &Sewer Maintenance Supervisor
Jonathan Brown, Water Plant Manager
Steve Brown, Project Manager
Demn Sharing, Civil Engineer
Prepared for:
UNITED STATES
ENVIRONMENTAL
PROTECTION AGENCY,
UNITED STATES
DEPARTMENT OF JUSTICE
00117
IOWA
DEPARTMENT OF
NATURAL RESOURCES
Prepared by:
CITY OF DUBUQUE, IA
50 W I P Street
Dubuque, IA 52001
THE CITY OF Dubuque
DUB E 11II1-'
Masterpiece on the Mississippi' 2012
Consent Decree
Semiannual Report
September 30, 2012
Consent Decree No. 2:11 -u -01011 -EIM
For Period
March 1, 2012 through
August 31, 2012
Table of Contents
1.0 CERTIFICATION ............................................................................... ............................1
-1
2.0 INTRODUCTION ............................................................................ ...............................
2 -1
2.1
Background .............................................................................. ............................2
-1
2.2
Purpose ..................................................................................... ............................2
-1
2.3
Report Summary ................................................................... ...............................
2 -1
3.0 SANITARY
SEWER OVERFLOWS ................................................ ............................3
-1
3.1
Sanitary Sewer Overflow Record ......................................... ...............................
3 -1
3.2
SSO's Effect on Public Health and Water Quality ............... ...............................
3 -1
3.3
Measures Enacted to Minimize Duration and Impact ........... ...............................
3 -2
3.4
Measures Enacted to Stop the Overflow Event .................... ...............................
3 -2
3.5
Measures Enacted to Prevent Another Recurrance ............... ...............................
3 -2
3.6
Capturing Key Way Overflows ............................................ ...............................
3 -2
3.7
Warning Sign Postings .......................................................... ...............................
3 -2
4.0 WATER & RESOURCE RECOVERY CENTER CONSTRUCTION UPGRADE. 4 -1
4.1 Project Planning .................................................................... ............................... 4 -1
4.2 Current Project Status ........................................................... ............................... 4 -1
4.3 Biosolid Accumulation Prevention at the W &RRC ............. ............................... 4 -2
5.0 NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) ... 5-1
5.1
Summary of all NPDES Permit Requirement Information ... ...............................
5 -1
5.2
NPDES Violations at the WRRC During The Reporting Period .........................
5 -1
5.2.1 NPDES Violation(s) Log ........................................ ...............................
5 -1
5.2.2 Cause of NPDES Violations ...................................... ............................5
-1
6.0 INFLOW & INFILTRATION REDUCTION PROGRAM ............ ............................6
-1
6.1
Background .............................................................................. ............................6
-1
6.2
Flow Metering ....................................................................... ...............................
6 -1
6.3
Source Investigations ............................................................... ............................6
-1
6.3.1 Private Property Inspections ................................... ...............................
6 -1
6.3.2 Dye Testing ............................................................ ...............................
6 -2
6.3.3 Smoke Testing ........................................................ ...............................
6 -2
6.3.4 Manholes ................................................................ ...............................
6 -3
6.3.5 Sanitary Sewer ........................................................ ...............................
6 -3
6.4
Corrective Action Plan .......................................................... ...............................
6 -4
6.5
Implementation of Corrective Action Plan ........................... ...............................
6 -4
i
7.0 CMOM UPDATE ................................................................................ ............................7 -1
7.1 The CMOM Program ............................................................ ............................... 7 -1
7.2 CMOM Implementation ........................................................ ............................... 7 -1
8.0 ASSESSMENTS AND ENGINEERING ANALYSES .................. ............................... 8 -1
9.0 OTHER RELATED ACTIVITIES .................................................... ............................9 -1
TABLES
Table 2 -1.
Organization of information required by the Consent Decree .... ...............................
2 -2
Table 3 -1.
Sanitary sewer overflows during the reporting period . ..............................................
3 -1
Table 3 -2.
Warning sign posting locations ................................................... ...............................
3 -2
Table 4 -1.
Significant deadlines for the Water & Resource Recovery Center . ...........................
4 -1
Table 5 -1.
Monthly operating reports submitted during the reporting period .............................
5 -1
Table 5 -2.
NPDES Violation Log ................................................................. ...............................
5 -1
Table 6 -1.
Property inspection progress . .....................................................................................
6 -1
Table 6 -2.
Smoke testing progress ................................................................ ...............................
6 -3
Table 6 -3.
Manhole inspection progress ....................................................... ...............................
6 -3
Table 6 -4.
Sanitary sewer main televising progress ..................................... ...............................
6 -4
FIGURES
Figure 6 -1. Map of priority sewersheds for I &I investigation....
APPENDICES
Appendix A: Preliminary Flow Metering Results
11
............ ............................... 6 -2
1.0 Certification
I certify under penalty of law that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my directions and my inquiry
of the person or person who manage the system, or those persons directly responsible for
gathering the information, the information submitted is, to the best of my knowledge and belief,
true, accurate, and complete. I am aware that there are significant penalties for submitting false
information, including the possibility of fine and imprisonment for knowing violations.
Michael C. Van Milligen
City Manager
1 -1
2.0 Introduction
2.1 BACKGROUND
The City of Dubuque, Iowa is under a Consent Decree according to Case 2:11 -cv- 01001 -EJM,
United States of America and the State of Iowa v. the City of Dubuque, IA (N.D. Iowa), Civil
Action Number 2008V00041. DOJ Case Number 90- 5 -1 -1- 09339.
The Consent Decree became effective on June 27, 2011 and requires the City to submit
semiannual reports to the Department of Justice (DOJ), Environmental Protection Agency (EPA)
and Iowa Department of Natural Resources (DNR).
2.2 PURPOSE
The purpose of this report is to satisfy Section VIII, Paragraph 25 of the Consent Decree.
Paragraph 25 requires the City to submit semiannual reports on March 31 and September 30 after
the Effective Date (June 27, 2011). The report includes summary information regarding events
and activities performed in the prior six months. Therefore, the "reporting period" shall refer to
the time between March 1, 2012 and August 31, 2012.
2.3 REPORT SUMMARY
Paragraph 25 of the Consent Decree requires the semiannual reports to include specific
information as well as a summary of the status and progress of all projects and programs required
by Sections V and VI of the Consent Decree. Table 2 -1 lists how the required information is
organized in this report.
2 -1
Table 2 -1. Organization of information required by the Consent Decree.
Consent Decree
Paragraph
Summary of Requirement
Report Section
25 a i
Sanitary Sewer Overflow SSO locations
3.1
25(a)ii
SSO duration of flows
Table 3 -1
25(a)iii
SSO estimated flow volume
Table 3 -1
25(a)iv
Waterbody downstream of SSO
Table 3 -1
25 a v
Suspected cause of SSO
Table 3 -1
25(a)vi
SSO effect on public health and water quality
3.2
25(a)vii
Measures to minimize SSO
3.3
25(a)viii
Measures to stop SSO
3.4
25(a)ix
Measures to prevent recurrence of SSO and milestones
3.5
25 b i
Construction upgrades
4.0
25(b)ii
NPDES permit summary
5.1
25(b)iii
NPDES permit violations during reporting eriod
5.2
8
Assessments and engineering analyses
8.0
9
Disposal of biosolids at WPCP
4.3
10(a)
Capture of overflow from Key Way Drive manhole
3.6
10(b)
Posting of warning signs at SSO locations
3.7
11
Construction upgrade to WPCP
4.2
12(a)
North Fork Catfish Creek interceptor placed into service
Requirement
completed
12(b)
I &I flow metering
6.2
12(c)
Flow meters installed in first sewershed during 2010
Requirement
completed
12(d)
I &I source identification
6.3
12(e)
I &I corrective action plan
6.4
12
Implement I &I corrective actions
6.5
Collection System Management, Operation, and
13(a)
Maintenance plan CMOM
7.0
13(b)
Implement CMOM
7.2
Requirement
completed upon
14
Certify legal authority
signing of
Consent Decree
Certify that Section V of Consent Decree has been
To be completed
15
completed and placed into service
by June 30, 2016
Demonstrate all SSO and by -passes have been
To be completed
16
eliminated
by June 30, 2017
If SSO or by -pass occurs, submit Remedial Plan and
Only applicable
17
Schedule
after June 30,
2017
If SSO or by -pass occurs due to O &M, submit Remedial
Only applicable
18
Plan and Schedule
after June 30,
2017
2 -2
3.0 Sanitary Sewer Overflows
3.1 SANITARY SEWER OVERFLOW RECORD
Four (4) sanitary sewer overflows (SSO, Table 3 -1) occurred in the City of Dubuque during the
reporting period.
Table 3 -1. Sanitary sewer overflows during the reoortim period.
SSO #
1'
2 '
3
4
Sewershed
8
8
15
14
3011 Shiras
3021 Shiras
1495 Southern
Street Address
290 Bradley Street
Avenue
Avenue
Avenue
Start Date
3/3/12
3/3/12
3/6/12
5/11/12
End Date
3/3/12
3/3/12
3/6/12
5/11/12
Start Time
2:30 p.m.
unknown
2:00 p.m.
5:00 p.m.
End Time
3:45 p.m.
unknown
2:30 p.m.
10:00 P.M.
o al
100
unknown
100
2003
VoOver
Downstream
Mississippi River
Mississippi River
Catfish Creek
Mississippi River
W ater bod
Suspected
d
Broken Force
Roots
Roots
Roots/Debris
Cause(s) �
Basement backup
z SSO # 1 and #2 are due to the same blockage event on 3/3/12. Approximately 100 gallons of untreated wastewater
was pumped into the storm system by the fire department while providing aid to the resident at 3011 Shiras. SSO
#2 was reported to the Public Works Department by the homeowner on Monday, March 5h after the blockage had
been removed, so it was not possible to obtain the start and end time and the overflow volume.
3 Volume estimate based on observation.
3.2 SSO'S EFFECT ON PUBLIC HEALTH AND WATER QUALITY
No effects on public health were reported for any of the SSOs. For SSO #1, the fire department
pumped an estimated 100 gallons of untreated wastewater into the storm sewer to aid the
resident. No water quality issues were noted because of this pumping.
Limited information is available for SSO #2 because it was reported to the Public Works
Department by the homeowner after the SSO #1 blockage had been removed.
SSOs #3 and #4 were limited to areas around each manhole. The areas were cleaned and SSO
signs were posted. The SSOs did not enter any downstream body of water.
3 -1
3.3 MEASURES ENACTED TO MINIMIZE DURATION AND IMPACT
The City minimized the duration and impact of the SSOs by removing each blockage in the
sanitary sewer main.
SSO #4 was caused by pipe failure in the force main. The pumps at the station were shut down
and the level maintained using a pumping truck which then hauled the sewage to the plant while
the pipe was being repaired.
3.4 MEASURES ENACTED TO STOP THE OVERFLOW EVENT
SSOs #1, #2, and #3 were stopped by cutting roots in the pipe and removing the blockage.
SSO #4 was caused by pipe failure in the force main. The pumps at the station were shut down
and the level maintained using a pumping truck which then hauled the sewage to the plant while
the pipe was being repaired.
3.5 MEASURES ENACTED TO PREVENT ANOTHER RECURRANCE
The locations of SSO #1, #2, and #3 will be added to the City's annual maintenance along with
chemical root foaming. The Fire Department has been instructed to discharge untreated
wastewater, when possible, to a tanker truck in the future.
SSO #4 was caused by pipe failure, and the pipe was repaired. The force main for these stations
will be placed in the Fiscal Year 2014 Capital Improvement Project budget to be replaced or
lined.
3.6 CAPTURING KEY WAY OVERFLOWS
Paragraph 10 of the Consent Decree requires the City to capture all overflows from the manhole
located on Key Way Drive between 3500 Keymeer Drive and 3507 Keystone Drive. An SSO did
not occur at this location during the reporting period, so it was not necessary to capture any
overflows.
3.7 WARNING SIGN POSTINGS
Paragraph 10 of the Consent Decree requires that the City post a warning sign at all SSO sites for
at least 6 months after completion of the site cleanup, unless IDNR decides that the sign may be
posted for a shorter period of time or not at all. Table 3 -2 lists the current locations where signs
are posted. (Postings are not required for basement backups.)
Table 3 -2. Warning sign posting locations.
SSO #
Location
Description
3
1495 Southern Avenue
Sign posted neat to manhole
4
290 Bradley Street
Sin posted at the dead end of Henderson Street
3 -2
4.0 Water & Resource Recovery Center
Construction Upgrade
4.1 PROJECT PLANNING
During its Fiscal Year 2006 goal setting process, the City Council listed the Water Pollution
Control Plant (WPCP) as one of its high priorities. City staff subsequently applied for a State
Revolving Fund (SRF) planning and design loan during the summer of 2006, and plant upgrades
were placed on the DNR Intended Use Plan schedule. Following public hearings and bidding
requirements, the Facility Plan was developed and approved by DNR. The facility's name was
also changed to the Water & Resource Recovery Center (W &RRC).
In October 2008, the team of Strand Associates /IIW Engineers was approved by the City Council
to proceed with the design of the W &RRC upgrades. The NPDES permit was issued by DNR
staff on April 1, 2010, and the plant construction permit was signed by DNR staff on April 5,
2010.
Following public bidding requirements, the City Council approved a contract, and the notice to
proceed was issued August 19, 2010. Table Table 4 -1 lists significant deadlines for the project.
Table 4 -1. Significant deadlines for the Water & Resource Recovery Center.
Deadline
Target Date
Digester Startup
9/26/2012
Sludge Processing Startup
1/23/2013
Aeration Tank Completion
7/22/2013
Final Clarifiers
8/30/2013
Excess Flow Equalization
10/23/2013
Substantial Completion
10/30/2013
Final Completion
1 4/8/2014
4.2 CURRENT PROJECT STATUS
On July 11, 2011 at approximately 6:10 A.M., a thunderstorm with winds of approximately 74
mph caused damage to two of the four digesters under construction. On July 28, 2011, the City
received more than 14 inches of rain in approximately twelve hours which caused considerable
damage to the W &RRC construction site. The damage caused by each event and the City's
response were documented in separate reports to the EPA, DOJ, and DNR dated July 15, 2011
and August 4, 2011.
The City had estimated a project delay of approximately three to four months beyond the final
completion date given of October 1, 2013. The City has since granted a 120 working day
4 -1
extension to the two major milestones of digester startup and sludge processing startup. The City
and its general contractor have worked out details of a revised project completion schedule
required by the weather related delays. Factoring in the delays, the City will still meet the startup
deadline (April 26, 2014) as prescribed in the Consent Decree barring any further major
uncontrollable delays.
As of August 2012 the project is in its 24th month of construction and work has been started on
all aspects of the project. City staff estimates the project is close to 66% complete. The
ultraviolet disinfection system was started in March 2011 and continues to be operational. The
Anaerobic Digestion complex began the startup process August 9, 2012. This process was
continued until August 20, 2012 when seed sludge was added to the digesters, with solids from
the Dubuque plant added to the digesters shortly thereafter. Depending on the speed of the
startup full solids loading into the digesters will be completed in 30 to 45 days. Upon successful
startup of the digesters work can begin on the installation of new solids handling equipment. The
bio- solids handling equipment is expected to be online by February 2013. There will be
sufficient storage in the digesters to accommodate solids storage until the new centrifuges are
online. A bio -solid handling contract has been negotiated and signed with Nutri -Ject Systems of
Hudson, Iowa.
The laboratory addition of the Administration/Laboratory Building is complete and work has
begun on the rebuilding of the existing Administration/Laboratory building. The
Administration/Laboratory Building will be a highly energy efficient building using plant
effluent to meet heating and cooling needs. The entire structure is highly insulated and will use a
minimum of energy for lighting, heating and cooling.
4.3 BIOSOLID ACCUMULATION PREVENTION AT THE W &RRC
On April 5, 2012 there was an explosion at the W &RRC which destroyed the main blower for
the North incinerator and severely damaged the recuperator. Because the digesters would be
online sooner than the incinerator could be repaired the decision was made to not repair the
incinerator and begin hauling solids to the Dubuque Area Metropolitan Sanitary Landfill.
Arrangements have also been made with Waste Management Inc. to haul solids to its landfill
facility in East Moline, Illinois.
The supplier of new centrifuges for the plant upgrade is the same firm that has performed major
maintenance on the existing centrifuges. This firm has informed W &RRC staff that they would
be available to assist should one or both of the operating centrifuges have a major breakdown. At
the point one of the centrifuges needs to be removed to proceed with that phase of construction
all critical parts from the removed centrifuge will remain on the plant site in order to facilitate a
rapid repair of the existing centrifuge and return the plant to full operating conditions.
Storage space for sludge will remain a challenge until portions of the new plant are brought
online. When sections of the reconstructed plant are brought into service, the City will be able to
use these areas to assist in W &RRC sludge management.
4 -2
5.0 National Pollutant Discharge Elimination
System (NPDES)
5.1 SUMMARY OF ALL NPDES PERMIT REQUIREMENT INFORMATION
NPDES Monthly Operating Reports (MOR) for the City of Dubuque W &RRC were submitted to
IDNR on the dates listed in Table 5 -1:
Table 5 -1. Monthly o eratin reports submitted during the reporting period.
Report
Date Submitted
February 2012
3/06/2012
March 2012
4/12/2012
April 2012
5/15/2012
May 2012
6/15/2012
June 2012
7/13/2012
July 2012
8/14/2012
August 2012
To be submitted
approximately 9/7/2012
5.2 NPDES VIOLATIONS AT THE WRRC DURING THE REPORTING PERIOD
The W &RRC had permit violations in April and May of 2012 following the explosion which
caused major damage to the then - operating incinerator used for solids disposal.
5.2.1 NPDES Violation(s) Log
Table 5 -2. NPDES Violation Log
TSS Seven Day Average
Maximum Allowed by Permit (mg/L
Reported m /L
April 22-28
45
49
May 1 -7
45
46
May 8 -14
45
144
TSS Monthly Average
May 2012
30
1 49
CBOD Seven Day Average
May 8 -14
25
1 62
5.2.2 Cause of NPDES Violations
As reported in section 1.3 The W &RRC lost the use of its only operating incinerator on April 5,
2012. It was necessary to make some piping adjustments to the sludge delivery system prior to
5 -1
being able to haul sludge to the landfill. This work took the remainder of that week in April to
complete. During this period, the City was unable to remove solids from the system which
contributed to a buildup of excess solids in the plant. In addition to the solids handling
difficulties the existing flow - meters where removed from the existing SCADA system and new
flow meters installed for the new SCADA system. The existing recycle pumps were controlled
from the old SCADA system, and it took a few days to coordinate the proper pumping rate using
both the new and old systems.
5 -2
6.0 Inflow & Infiltration Reduction Program
6.1 BACKGROUND
Prior to the Consent Decree date of lodging, the City experienced several discharges of untreated
or partially treated wastewater. These events were caused by sharp increases in flow within the
sanitary sewer system during and immediately after a rainstorm. To better locate the sources of
this issue, the City placed flow meters throughout the city. Depending on location, the meters
measured the flow of water from each sewershed over a one to eleven month period of time. Five
of the twelve sewersheds were identified as receiving elevated flows during and directly after a
precipitation event.
Under the Consent Decree, the City has agreed to investigate these five sewersheds before
January 1, 2016. The section below describes the City's progress in identifying I &I sources in
the five sewersheds (Figure 6 -1).
6.2 FLOW METERING
The City conducted flow metering within Sewershed 7 during 2012. Preliminary flow metering
results are presented in Appendix A.
6.3 SOURCE INVESTIGATIONS
6.3.1 Private Property Inspections
Private property inspection progress is reported in Table 6 -1. Private property inspections
identify the roof drain discharge location, the presence of any stairwell or driveway drains, and
the presence of a sump pit /pump on site. A passing inspection indicates no connections of clear
water to the sanitary system. A failed inspection indicates a connection of clear water directly
into the sanitary system, which may include roof drains connected to the sanitary sewer; a
stairwell or driveway drain which is connected to the building floor drain; or a sump pump which
is plumbed directly to the sanitary lateral or a floor drain within the building.
Table 6 -1. Pronertv inspection nroeress.
Sewershed
Percent of Completed Property
Inspections*
Consent Decree Deadline to Complete
Property Inspections
11
100
9/30/11
12
90.6
6/30/12
7
90.2
6/30/13
5
14.8
6/30/14
10
None
6/30/15
*The Consent Decree does not state that all properties must be inspected. However, it is the City of Dubuque's
intent to inspect 100% of the properties in each sewershed.
6 -1
Each improper connection observed during a private property inspection results in a failure
notice. The property owner then has 30 days to correct the improper connection, at which point a
re- inspection of the property conducted to verify that the improper connection has been
eliminated. If the improper connection has not been corrected, the City may pursue legal action
against the property owner to complete the necessary work.
Inflow & Infiltration Program, & A DUB UE
Snnitnry S,.,, W, To B, lnspeeted Aa `m ---0'
g
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4 _
NYgure 61. Map of priority sewersheds for I &I investigation.
6.3.2 Dye Testing
Dye testing has been performed in conjunction with private property inspections. If the discharge
location of a downspout, exterior stairwell drain, or driveway drain is unknown, the City will use
dye to identify the discharge location(s). If the dye is found in the sanitary sewer, the property
owner receives notice consistent with the private property inspection process described in
Section 6.3.1.
6.3.3 Smoke Testing
Smoke testing progress is reported in Table 6 -2. The City conducted smoke testing in
Sewersheds 7 and 5 during July and August 2012, respectively. Results will be included in the
6 -2
Corrective Action Plan for each sewershed according to the deadline outlined in the Consent
Decree. Defects and their locations were recorded and will be processed using the City's GIS.
Table 6 -2. Smoke testing progress.
Sewershed
Percent of Smoke Testing Completed*
Consent Decree Deadline to Complete
Property Inspections
11
100
9/30/11
12
100
6/30/12
7
100
6/30/13
5
100
6/30/14
10
None
6/30/15
*The Consent Decree does not state that smoke testing must occur within every sanitary sewer main of each
sewershed. However, it is the City of Dubuque's intent to smoke -test 100% of the sanitary sewer mains in each
sewershed.
6.3.4 Manholes
Manhole inspection progress is reported in Table 6 -3. All sanitary manholes in Sewersheds 12, 5,
and 7 have been opened and recorded as concrete or brick and rated based on structural integrity
in order to prioritize improvement or replacement. Inspection results were recorded and
processed using the City's GIS.
Table 6 -3. Manhole inspection progress.
Sewershed
Percent of Manhole Inspections
Completed*
Consent Decree Deadline to Complete
Property Inspections
11
100
9/30/11
12
100
6/30/12
7
100
6/30/13
5
99
6/30/14
10
None
6/30/15
*The Consent Decree does not state that all manholes must be inspected. However, it is the City of Dubuque's intent
to inspect 100% of the brick manholes in each sewershed.
6.3.5 Sanitary Sewer
Progress of sanitary sewer main televising is reported in Table 6 -4. Any cracks, leaky joints,
illegal lateral connections, and damaged or broken pipes have been recorded. The severity of the
structural degradation of each pipe section will be rated based on severity. This rating system
will be used to prioritize which pipe sections are in need of immediate improvement.
6 -3
Tahle 6 -4. Sanitary sewer main televisinn nrnnress.
Sewershed
Percent of Televised Sanitary Sewer
Mains*
Consent Decree Deadline to Complete
Property Inspections
11
>95
9/30/11
12
>90
6/30/12
7
>66
6/30/13
5
None
6/30/14
10
None
6/30/15
*The Consent Decree does not state that all sanitary sewer mains must be televised. However, it is the City of
Dubuque's intent to televise 100% of the sanitary sewer mains in each sewershed.
6.4 CORRECTIVE ACTION PLAN
As stated in Paragraph 12 of the Consent Decree, the Sewershed 11 Corrective Action Plan was
submitted prior to December 31, 2011. A similar report will be submitted by December 31, 2012
for Sewershed 12.
6.5 IMPLEMENTATION OF CORRECTIVE ACTION PLAN
The City is awaiting approval of the Sewershed 11 Corrective Action Plan submitted to EPA in
December 2011. Due to schedule requirements, however, work has already begun where
necessary. City staff continues to work with property owners to correct improper private
connections. The City is actively rehabilitating brick manholes and sanitary sewer pipes that
were identified in the plan to be deficient.
6 -4
7.0 CMOM Update
7.1 THE CMOM PROGRAM
The City of Dubuque's Capacity, Management, Operation and Maintenance Plan (CMOM)
provides a summary of its policies, procedures, practices, and responsibilities associated with its
sanitary sewer collection system. It is the blueprint for the City's managers and field workers to
better manage, operate, and maintain Dubuque's sanitary sewer collection system, investigate
capacity- constrained area, prevent SSOs, respond to SSOs that may occur, and plan for future
system expansion.
The City received notice from the EPA that the CMOM had been approved on June 4, 2012.
7.2 CMOM IMPLEMENTATION
As required by Paragraph 13 of the Consent Decree, the City has fully implemented the CMOM
within two calendar months (August 4, 2012) of approval by the EPA.
The City developed the CMOM to serve as a "living" document. As the City reviews its current
procedures and codes, the CMOM will be updated and new procedures implemented as needed.
Any revisions to the CMOM will be submitted to EPA, DOJ, and DNR for review and approval
as required under the Consent Decree.
7 -1
8.0 Assessments and Engineering Analyses
The City's engineering department, public works department and W &RRC staff continue to
evaluate and analyze the sewer collection system and W &RRC to ensure compliance with all
legal requirements. However, no specific study was undertaken during the reporting period.
8 -1
9.0 Other Related Activities
• Submitted semiannual report on March 26, 2012. Awaiting approval by EPA.
9 -1
Appendix A
Sewershed 7 Preliminary Flow Metering Results
SwmhdTSubeehdDelineation
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140,000
120,000
100,000
40,000
20,000
R
24th & White Streets
Flow Montoring Location #1 (2012)
6� IOX 10\10 4,11 4,1 1r
=Rainfall Total Flow —DWF
iii
1.2
GI3
0.6
i
0.4
0.2
R
250,000
200,000
150,000
100,000
50,000
0
White Street - Next to Fulton School
Flow Montoring Location #2 (2012)
=Rainfall Total Flow —DWF
iv
-01 `1 �^� ti`'
� 1 �
1.2
GI3
0.6
i
0.4
0.2
R
MM
70,000
50,000
40,000
30,000
20,000
10,000
0
4VI 6i° e 41 e 1\�, -%\° 414 1 ^\q"
=Rainfall Total Flow DWF
400 Kaufmann Ave
Flow Montoring Location #3 (2012)
V
1.2
GI3
0.6
i
0.4
0.2
W
40,000
35,000
30,000
25,000
20,000
15,000
10,000
5,000
0
41 41V
Rainfall Total Flow —DWF
524 Kaufmann Avenue
Flow Monitoring Location #4 (2012)
Vi
1.2
GI3
0.6
i
0.4
0.2
W