Consent Decree Semi Annual Report_September 2013Masterpiece on the Mississippi
TO: The Honorable Mayor and City Council Members
FROM: Michael C. Van Milligen, City Manager
SUBJECT: September 30th Semi Annual Report
US EPA Consent Decree Required Submittal
DATE: August 26, 2013
Dubuque
band
AI- America City
1
2007 • 2012 • 2013
City Engineer Gus Psihoyos recommends City Council approval for the City Manager to
certify the September 30th Semi Annual Consent Decree Report to be submitted to the
U.S. Department of Justice, U.S. EPA and the Iowa Department of Natural Resources.
I concur with the recommendation and respectfully request Mayor and City Council
approval.
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
Masterpiece on the Mississippi
TO:
FROM: Gus Psihoyos, City Engineer
SUBJECT: September 30th Semi Annual Report
US EPA Consent Decree Required Submittal
Michael C. Van Milligen, City Manager
DATE: August 20, 2013
Dubuque
ar•wnriaaer
2007 • 2012 •2011
INTRODUCTION
The purpose of this memorandum is to request City Council approval to authorize the
City Manager to certify and submit to the appropriate parties, the City of Dubuque's
September 30th Semi Annual Report, a Consent Decree required submittal.
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 effective June 27, 2011. Per the Consent Decree, the City is required to
submit a Semi Annual Report each March 31st and September 30th after the effective
date of the Consent Decree.
DISCUSSION
The purpose of the Semi Annual report is to present events and activities associated
with the WRRC and the Sanitary Sewer Collection System since approval of the
Corrective Action Plans. The report specifically includes documentation on all Sanitary
Sewer Overflows, a summary and status of projects including the WRRC Upgrades, a
listing of all NPDES violations, and efforts and actions taken to reduce sources of
infiltration and inflow.
ACTION TO BE TAKEN
I respectfully request the City Council approve and authorize the City Manager to certify
the September 30th Semi Annual Report and Engineering staff to submit the certified
report to the US Department of Justice, US EPA and the Iowa Department of Natural
Resources.
cc: Barry Lindahl, City Attorney
Denise Ihrig, Environmental Engineer
Prepared for:
UNITED STATES
ENVIRONMENTAL
PROTECTION AGENCY,
UNITED STATES
DEPARTMENT OF JUSTICE
AND
IOWA
DEPARTMENT OF
NATURAL RESOURCES
Prepared by:
CITY OF DUBUQUE, IA
50 W 13th Street
Dubuque, IA 52001
Consent Decree
Semiannual Report
September 30, 2013
Consent Decree No. 2:11 -cv- 01011 -EJ M
September 3, 2013
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 -3
3.1 Sanitary Sewer Overflow Record 3 -3
3.2 SSO's Effect on Public Health and Water Quality 3 -3
3.3 Measures Enacted to Minimize Duration and Impact 3 -4
3.4 Measures Enacted to Stop the Overflow Event 3 -4
3.5 Measures Enacted to Prevent Another Recurrance 3 -4
3.6 Capturing Key Way Overflows 3 -4
3.7 Warning Sign Postings 3 -5
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 -2
6.1 Background 6 -2
6.2 Flow Metering 6 -2
6.2.1 Sewershed 11 Flow Metering 6 -2
6.2.2 Sewershed 7 Flow Metering 6 -3
6.2.3 Sewershed 5 Flow Metering 6 -3
6.3 Source Investigations 6 -4
6.3.1 Private Property Inspections 6 -4
6.3.2 Dye Testing 6 -5
6.3.3 Smoke Testing 6 -5
i
6.3.4 Manholes 6 -5
6.3.5 Sanitary Sewer 6 -6
6.4 Corrective Action Plan 6 -6
6.5 Implementation of Corrective Action Plan 6 -6
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
APPENDIX A - SEWERSHED 11 FLOW METER LOCATIONS AND PRELIMINARY
DATA 9 -2
APPENDIX B — SEWERSHED 7 FLOW METER LOCATIONS 9 -3
APPENDIX C — SEWERSHED 5 FLOW METER LOCATIONS AND PRELIMINARY
DATA 9 -4
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 -3
Table 3 -2. Warning sign posting locations. 3 -5
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
FIGURES
Figure 6 -1. Map of priority sewersheds for I &I investigation. 6 -5
ii
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.
Mic el C. Van Milligen
City Manager
2.1 BACKGROUND
2.0 Introduction
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, 2013 and August 31, 2013.
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.
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
period
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
Reported in 9/30/11
Semiannual Report
12(b)
I &I flow metering
6.2
12(c)
Flow meters installed in first sewershed during
2010
Reported in 9/30/11
Semiannual Report
12(d)
I &I source identification
6.3
12(e)
I &I corrective action plan
6.4
12(f)
Implement I &I corrective actions
6.5
13(a)
Collection System Management, Operation, and
Maintenance plan (CMOM)
7.0
13(b)
Implement CMOM
7.2
14
Certify legal authority
Completed upon signing
of Consent Decree
15
Certify that Section V of Consent Decree has
been completed and placed into service
To be completed by June
30, 2016
16
Demonstrate all SSO and by -passes have been
eliminated
To be completed by June
30, 2017
17
If SSO or by -pass occurs, submit Remedial Plan
and Schedule
Only applicable after
June 30, 2017
18
If SSO or by -pass occurs due to O &M, submit
Remedial Plan and Schedule
Only applicable after
June 30, 2017
3.0 Sanitary Sewer Overflows
3.1 SANITARY SEWER OVERFLOW RECORD
The City of Dubuque experienced three (3) dry and two (2) wet weather sanitary sewer
overflows occurred during the reporting period. Table 3 -1 lists the locations and details of the
overflows. The times reported as Start Times document when the call came into the Public
Works department, although it is difficult to know the precise time of the start of the overflow as
it is reliant upon when a member of the public observing and reporting the occurrence.
Table 3 -1. Sanitary sewer overflows during the reporting period.
SSO #
1
2
3
4
5
Sewer shed
9
14
11
16
16
Street Address
1375
Kaufmann
Avenue
455 Moore
Heights
Rosedale and
Locust
85 North
Booth St.
388 York
Street
Start Date
4/8/2013
4/17/2013
4/18/2013
4/18/2013
6/28/2013
End Date
4/8/2013
4/17/2013
4/18/2013
4/18/2013
6/28/2013
Start Time
2:30PM
2:30PM
1:OOAM
2:30AM
8:41AM
End Time
3:OOPM
4:30PM
9:45AM
9:45AM
9:45AM
Overflow
Volume, Gal
200
200
468,000
66,000
100
Downstream
Waterbody
Bee Branch
Creek
Catfish Creek
Mississippi
River
Mississippi
River
Mississippi
River
Suspected Cause
Grease
Pipe Failure
Rain Inflow
Rain Inflow
Debris -
Concrete
* Basement backup
3.2 SSO'S EFFECT ON PUBLIC HEALTH AND WATER QUALITY
No effects on public health were reported. Visual inspection at the downstream waterbody (prior
to discharge to the Mississippi River) showed no sign of putrescent, unsightly or harmful bottom
deposits; oil, scum and floating debris; unsightly color or turbidity; or offensive odors. For each
incident in the public right of way, the Public Works department cleaned the area and posted the
required SSO signs.
3.3 MEASURES ENACTED TO MINIMIZE DURATION AND IMPACT
The City minimized the duration and impact of the SSOs by quickly responding to the event after
it was called in and setting up a City -owned vacuum jet truck to jet the sewer main and remove
the blockage.
3.4 MEASURES ENACTED TO STOP THE OVERFLOW EVENT
For overflow events 1 and 5, the overflow was stopped by removing the blockage using the
vacuum jet equipment. For event 2, Public Works bypassed flow around the broken section of
sanitary sewer to a downstream sanitary sewer manhole. A contractor was contacted and within
24 hours a pipe repair was made. For sanitary sewer overflow 3, the public works department
able to capture approximately 20% of the untreated flow and return it to the sanitary sewer
system, however, bypassing pumping to the storm sewer system could not be avoided; and at
sanitary sewer overflow 4, bypass pumping to the storm sewer was put in place to reduce
possible basement backups.
3.5 MEASURES ENACTED TO PREVENT ANOTHER RECURRANCE
Increased maintenance will be performed on lines where debris was the cause of the blockage.
Following the CMOM, the City continues to work on proactive methods to implement the Fats,
Oils, and Grease (FOG) ordinance and reduce grease - related overflows. The City has determined
the key staff and departments along with an appropriate tracking method for sources of FOG.
Working with the Health and Building Services Department the WRRC will be able to monitor
the FOG hauling program and determine which FOG owners may not be maintaining their grease
removal devices or interceptors. While this portion of the program has been determined, the next
phase is to purchase software and craft the ordinance to support the departments as they enforce
the program. For rainwater inflow and infiltration related overflows, the City is conducting
capital improvements based on information collected during flow monitoring, sump pump and
downspout inspections in properties designated in the Consent Decree, along with smoke testing
and closed- circuit televising of the sanitary sewers.
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 Keymer Drive and 3507 Keystone Drive. No sanitary
sewer overflows occurred at this location during the reporting period.
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 nostine locations.
SSO Location
Description
1375 Kaufmann
Sign posted across from 1350 Kaufmann
455 Moore Heights
Signs are posted on westside of the cul -de -sac and in
the grassy area adjacent to location of the pipe
failure behind 455 Moore Heights
Rosedale and Locust
Sign is posted on Rosedale near West Locust.
85 North Booth
Sign is posted near 30 North Booth
388 York Street
Sign is located across from 388 York Street
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 and 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 the revised significant deadlines for
the project, which take into account project delays resulting from force majeure.
Table 4 -1. Significant deadlines for the Water & Resource Recovery Center.
Deadline
Target Date
Digester Startup
January 7, 2013
Sludge Processing Startup
February 6, 2013
Excess Flow Equalization
April 18, 2013
Aeration Tank Completion
June 21, 2013
Final Clarifiers
August 8, 2013
Final Completion
February 3, 2014
4.2 CURRENT PROJECT STATUS
Through August 31st, 2013, the project is in its 36th month of construction and work has started
on all aspects of the project. The WRRC improvements appear to be on schedule. The ultraviolet
disinfection system was started in March 2011 and continues to be operational. The anaerobic
digestion complex started up August 9, 2012. On August 20, 2012 seed sludge was added to the
digesters, with solids from the Dubuque plant added to the digesters shortly thereafter. With a
successful startup of the digesters in January 2013, the City installed the new solids handling
equipment which came on -line in February 2013. A bio -solid handling contract was negotiated
4 -1
and signed with Nutri -Ject Systems of Hudson, Iowa.
The laboratory addition to the Administration/Laboratory Building (A &L Building) is complete
and work is close to completion on the rebuilding of the existing A & L Building. The A &L
Building will be a high- energy efficient building using plant effluent to meet heating and cooling
needs. With extensive insulation, the building will use very little energy for lighting, heating and
cooling.
4.3 BIOSOLID ACCUMULATION PREVENTION AT THE W &RRC
In February 2013, the City installed the new solids handling equipment (two centrifuges), and
entered into a contract with Nutri -Jet Systems of Hudson, Iowa to manage the bio- solids, thereby
preventing accumulation of bio- solids at the W &RRC.
oQ� 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 operating reports submitted during the reporting period.
Report
Date Submitted
February 2013
3/15/2013
March 2013
4/15/2013
April 2013
5/15/2013
May 2013
6/13/2013
June 2013
7/11/2013
July 2013
8/15/2013
August 2013
Scheduled 9/15/2013
5.2 NPDES VIOLATIONS AT THE WRRC DURING THE REPORTING PERIOD
There were no NPDES Violations during the reporting period
5.2.1 NPDES Violation(s) Log
There were no NPDES Violations during the reporting period.
5.2.2 Cause of NPDES Violations
There were no NPDES Violations during the reporting period.
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 sewersheds 12, 11, and 7 during 2012 and has
completed an initial round of flow data collection in Sewershed 5.
6.2.1 Sewershed 11 Flow Metering
Continued concern in Sewershed 11 prompted returning flow meters to the area. From early in
April 2013 three flow meters were placed at key locations; MH 04697 which is located upstream
of where the city has bypass pumped due to sanitary sewer overflows (SSOs) at Rosedale and
Locust; a second in MH04685, a totalizing meter, located downstream of the bypass pump
location; and a third in MH04701 located upstream in W. Locust Street. The three flow meters
represent flows from the two main branches in Sewershed 11 passing through a total flow meter.
Due to the recent sanitary sewer overflows in Sewershed 11 at Rosedale and Locust the City
purchased eight additional flow meters to collect data from each of the contributing feeds
upstream of where an SSO traditionally occurs. The additional meters were installed in early
July. It is too soon to draw conclusions as to why the sanitary sewer overflows are occurring
therefore the additional meters will remain in place until the City has collected sufficient data.
Preliminary data along with a flow meter location map for Sewershed 11 can be found in
Appendix A. The first set of data was collected during the April 18th, 2013 rain event and is for
two flow meters, one located to collect flow data from W. Locust, and the second to collect data
from W. Locust and the area upstream of Rosedale and Locust. The meter at Rosedale and
Locust had data error and could not be used. The second data set is for the three flow meters
mentioned above and shows the data collected during the July 8th, 2013 rain event. The rain
events occurred with different preceding conditions, the April 18th had saturated ground
6 -2
conditions, and the July 8th event had dry ground conditions. It is clear that additional flow is
entering the system during train events, however the rate and volume of additional flow are in
some cases within the allowable amount of infiltration and inflow, prompting questions as to
why sanitary sewer overflows are occurring. Further work is necessary to determine how the
system is performing and why the system is not able to manage the flows. Before conclusions
can be drawn, additional flow data will be collected to see if the trend continues with future rain
events.
Another element of data collection is ensuring the devices are correctly logging. The preliminary
data, in some cases, shows flow data upstream of the Total Flow meter at 606 W. Locust and
Foye to have greater maximum flows than the preceding meters. It is essential to check the flow
meters often and ensure levels sensors are correctly detecting flow levels in the pipe especially
during low flows. During low flows and overnight flows the flow meters should be capable of
detecting low flows without modifying the data. The City is working with the meter
manufacturer to correctly install the flow meters so they read actual flows and not report
projected or adjusted flows. This is critical to determining the actual rate of infiltration prior to
an event.
The City is close to establishing a permanent meter location in Sewershed 11. Working with the
City's Information Service and Traffic Engineering Center departments, the City is looking into
how data from the flow monitors can be conveyed electronically to a central computer system at
City Hall and relay key flow meter data to Public Works and the Water Resource and Recovery
Center. In addition, the City met with a consulting firm which specializes in SCADA systems on
how to direct data from the flow monitors into a SCADA system for increased secure monitoring
of the sewer system and greater accessibility.
6.2.2 Sewershed 7 Flow Metering
Flow data in Sewershed 7 was captured in 2012; however, additional data is being sought to
clarify where the inflow and infiltration is entering the sewer system which will allow the City to
target capital improvements. Data collected during 2012 as submitted in the September 30, 2012
Semi Annual Report, showed flow data in the northern portion of the Sewershed reflecting a
flow behavior common for infiltration while the western portion of the Sewershed reflecting a
flow pattern indicative of inflow. Appendix B shows the location of the redeployed flow meters
in Sewershed 7.
6.2.3 Sewershed 5 Flow Metering
Flow monitoring in Sewershed 5 has started, with an initial data capture of approximately 120
days. Early flow monitoring and site inspection detected significant inflow in an area adjacent to
the Carter Road detention basin. A significant rain event passed through the area on April 17
through the 18th, with ground saturation from previous small rain events, the detention basin held
water for approximately two days. The location of the basin is situated such that during
detention times, sanitary sewer manholes may be covered with storm water. It was noted during
a routine inspection of the detention basin after the storm event that a sanitary sewer manhole
chimney seal had dislodged potentially allowing flow to enter the sanitary sewer. A review of the
6 -3
flow data from the flow meter at Carter Road and W. 32nd showed a significant increase in flow
during the April 18th rain event. A repair was made to the faulty chimney seal. Storm events in
May and July were captured by the flow monitors with significantly different results from the
April 18th event, the total flow passing through the areas was reduced by approximately 5 million
gallons. Further flow monitoring will be necessary to isolate further inflow and confirm the
corrective action at the detention basin continues to perform. To further secure the area, sanitary
sewer lining and manhole lining may be necessary. Appendix C contains the flow data before
and after the corrective action at the detention basin for Sewershed 5 along with a meter location
map. The appendix includes the inflow and infiltration determination calculations along with a
graph for
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. Property inspection progress.
Sewershed
Percent of Completed Property
Inspections*
Consent Decree Deadline to Complete
Property Inspections
11
100
9/30/11
12
98
6/30/12
7
94
6/30/13
5
97
6/30/14
10
0
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.
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 is 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 Progra
Sanitary Sewersheds To Be Inspected
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Figure 6 -1. 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
The City is preparing to smoke test in Sewershed 10. The recent weather conditions drying the
ground are creating a favorable situation for smoke detection.
6.3.4 Manholes
As discussed in the Sewershed 12 Corrective Action Plan, each sanitary manhole in Sewershed
12 has been opened and recorded as concrete or brick and rated based on its structural integrity
in order to prioritize its improvement or replacement. A similar process is underway in
Sewershed 7.
6.3.5 Sanitary Sewer
The City continues to conduct closed - circuit televising in the focus areas, currently working in
Sewersheds 5 and 7. Approximately 90 to 95% of the public sanitary sewers within Sewershed 7
and approximately 50% of sanitary sewers in Sewershed 5 have been televised. The recorded
footage will allow the City to view any cracks, leaky joints, illegal lateral connections, and
damaged or broken pipes. The severity of the structural degradation of each pipe section is rated
based on a severity scale following the NASSCO (National Association of Sewer Service
Companies) rating schedule. The rating system is used to assist the city in prioritizing which pipe
sections are in need of immediate improvement. This work combined with the flow monitoring
data provides the City with direction on how and where to make valued capital improvements.
6.4 CORRECTIVE ACTION PLAN
Corrective Action Plans are scheduled for submittal as required by Paragraph 12 of the Consent
Decree. Sewershed 12 Corrective Action Plan was submitted December 31, 2012 deadline. The
next Corrective Action Plan is due December 31, 2013 and will contain corrective measures for
Sewershed 7.
6.5 IMPLEMENTATION OF CORRECTIVE ACTION PLAN
The City has approved a contract to Visu Sewer, Inc of Pewaukee, Wisconsin to complete
approximately 15,000 lineal feet of sanitary sewer rehabilitation via cured -in- place -pipe in
Sewershed 11 and 12. The project is scheduled for completion November 29, 2013.
These activities are per the Correction Action Plan for Sewersheds 11 and 12.
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 the City's 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 EPA approved the City of Dubuque's CMOM plan on June 4, 2012.
7.2 CMOM IMPLEMENTATION
As required by Paragraph 13 of the Consent Decree, the City fully implemented the CMOM
within two calendar months (August 4, 2012) of approval by the EPA.
Section 6.4 of the City of Dubuque's CMOM Program, requires the City to annually inspect fifty
(50) miles of gravity sanitary sewer through various methods including visual inspection,
pipeline jetting, or closed- circuit televising (CCTV). The inspection is in addition to the
predictive and preventive maintenance also prescribed in the CMOM. The City has cleaned or
inspected 92.17 miles from September 1, 2012 through this reporting period.
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.
The City is currently focused on the Fats, Oils, and Grease Program covered by the CMOM, as
several of the dry weather sanitary sewer overflows are the result of grease in the public sewer
from private establishments. As discussed in Section 3.5, the City has determined the key staff
and departments along with an appropriate tracking method for sources of FOG. Working with
the Health and Building Services Department the WRRC will be able to monitor the FOG
hauling program and determine which FOG owners may not be maintaining their grease removal
devices or interceptors. While this portion of the program has been determined, the next phase is
to purchase software and craft the ordinance to support the departments as they enforce the
program.
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.
9.0 Other Related Activities
• On September 24th, the City of Dubuque in partnership with the Sustainable City
Network is hosting the 6th Annual Growing Sustainable Communities (GSC) Conference.
The conference is intended for community leaders representing local government,
business, non - profits, and schools. The GSC conference will feature more than twenty
educational workshops and mobile tours related to sustainability, resource conservation
and community engagement. Two key workshops will focus on storm water as a resource
to be correctly managed. The workshop on Water Resource Restoration and Green
Infrastructure will address storm water management program activities associated with
the planning, design, and construction of low impact development and green
infrastructure, such as bioretention, constructed wetlands, permeable pavement, rain
gardens, green roofs, cisterns, rain barrels, vegetated swales, and restoration of riparian
buffers and flood plains. In another workshop, on Sustainable Storm water Management -
From Rain to Recreation it will provide an understanding of the environmental &
economic benefits of proactively turning a storm water liability into an amenity. City of
Dubuque staff members are strongly encouraged to attend the conference as part of the
City's effort to proactively address storm water issues and attain further knowledge on
storm water best management practices.
APPENDIX A - SEWERSHED 11
FLOW METER LOCATIONS AND
PRELIMINARY DATA
Sewershed 11: Flow Meter Locations
FAIRWAY DR
0
m
ti
ti
CLARKE DR
-n
0
m�.
WLOCUST ST _-4—
UNGS ST
S
co
11 -4
AL
0
F840 Au urn St
GNE
A
Z
c
A v co
ry 0 Z
Z
✓ N
A -
tn
qiS,r
.ST
11 -3
11 -5
9<"
✓ � _
Z NA
°v SI vP
m IAP
N� E�
PARK ST
JD
OAS \ANSI
0
N
AZ
UNIVERSITY AVE
Nr
BENNETT ST
ti
Z
0
0
N
1
c-
Z D C2 m D X :(L) z
STH ST
MELROSE TE
Legend
- Road Centerline
Sanitary Sewershed
Sewershed ID
ED 11 -1
L._._. .__I 11 -2
I11 -3
r1 11-4
Ell 11 -5
Meter Location
•
Sewershed 11
Total Meter: MH SAN S 04685 606 West Locust St.
Determine Incremental Inflow and Infiltration, (gpd) /(in *mile)
Basin No.
Pipe Diameter,
Inches
Length of Sewer, FT
Length of Sewer, Mile
in *mile
Partial 13
8
717.20
0.14
1.09
8
7,033.44
1.33
10.66
12
2,088.49
0.40
4.75
11 -2
6
160.69
0.03
0.18
8
9,475.46
1.79
14.36
11 -3
6
1,137.47
0.22
1.29
8
4,731.05
0.90
7.17
11 -4
6
3,643.55
0.69
4.14
8
18,824.32
3.57
28.52
12
282.89
0.05
0.64
11 -5
6
2,224.28
0.42
2.53
8
8,271.96
1.57
12.53
12
2,593.42
0.49
5.89
Partial 11 -5
12
174.10
0.03
0.40 _
Total
11.62
94.15
Measured Flow time Period 4/16/2013 through 4/23/2013 Rain Event on 4/18/2013
1,083,000.00 gallons, Maximum Wet Weather Flow
7
days
405,000.00 gallons, Average Dry Weather Flow 7 days
154,714.29 gpd
57,857.14 gpd
Maximum Wet Weather Flow (Average)
Average Dry Weather Flow
Difference, Max -Ave GPD of I/1= 96,857.14
Result of I/1 Determination: Not Excessive 1/1
GPD /in *mile= 1,028.77
3.0
2.5 -
606 W Locust and Foye
April 18 2013 storm with ADWFR starting July 10
Max Wet Flow Rate (1.083 mgd):
Ave Dry Flow Rate (0.405 mgd):0.52
Cumulative Rainfall (2.940 in):0.00
-a 2.0- ADFR 0.405 mgd
E 1.5 = I /�
1.0 -
0.5 .---\�
0.6
0.5
?0.4—
0.3
0.2
0.12 -
0.10-
0.08—
•= 0.06 -
0.04-
0.02-
0.00
I
17 Wed
Apr 2013
18 Thu 19 Fri 20 Sat 21 Sun
4/16/2013 12:00:00 PM - 4/23/2013 12:00:00 PM
22 Mon
23 Tue
Sewershed 11
Sub Meter: MH SAN S 04701 1098 W. Locust St.
Determine Incremental Inflow and Infiltration, (gpd) /(in *mile)
Basin No.
Pipe Diameter,
Inches
Length of Sewer, FT
Length of Sewer,
Mile
in *mile
Partial 11-5
8
3,314.16
0.63
5.02
Total
0.63
5.02
Measured Flow time Period 7/6/2013 through 7/13/2013 Rain Event on 7/8/2013
78,000.00 gallons, Maximum Wet Weather Flow 7 days
33,000.00 gallons, Average Dry Weather Flow 7 days
11,142.86 gpd Maximum Wet Weather Flow (Average)
4,714.29 gpd Average Dry Weather Flow
Difference, Max -Ave GPD of 1/I = 6,428.57
Result of I/I Determination: Excessive I/1
GPD /in *mile= 1,280.18
0.3
5%0.2
0.1
0.20
0.15
0.05
0.00
0.20
0.15
0.10
0.05
Max Wet Flow Rate (0.078 mgd):
1098 W Locust
July 8 2013 storm with ADWFR starting July 10
Ave Dry Flow Rate (0.033 mgd):0.07 Cumulative Rainfall (1.350 in):0.00
ADFR 0.033 mgd
(444
0.00 1 I 1 1
7 Sun 8 Mon 9 Tue 10 Wed 11 Thu 12 Fri 13 Sat
Jul 2013 7/6/2013 12:00:00 PM - 7/13/2013 12:00:00 PM
Sewershed 11
Sub Meter: MH SAN S 04697 Rosedale and Locust (1010 W. Locust St.)
Determine Incremental Inflow and Infiltration, (gpd) /(in *mile)
Basin No.
Pipe Diameter,
Inches
Length of Sewer, FT
Length of Sewer, Mile
in mile
Partial 13
8
717.20
0.14
1.09
8
7,033.44
1.33
10.66
12
2,088.49
0.40
4.75
11 -2
6
160.69
0.03
0.18
8
9,475.46
1.79
14.36
11 -3
6
1,137.47
0.22
1.29
8
4,731.05
0.90
7.17
11 -4
6
3,643.55
0.69
4.14
8
18,824.32
3.57
28.52
12
282.89
0.05
0.64
Partial 11 -5
12
365.42
0.07
0.83
Total
9.18
73.63
Measured Flow time Period 7/6/2013 through 7/13/2013 Rain Event on 7/8/2013
659,000.00 gallons, Maximum Wet Weather Flow 7 days
507,000.00 gallons, Average Dry Weather Flow 7 days
94,142.86 gpd Maximum Wet Weather Flow (Average)
72,428.57 gpd Average Dry Weather Flow
Difference, Max -Ave GPD of I/I = 21,714.29
Result of I/I Determination: Not Excessive I/1
GPD /in *mile= 294.92
1.5
E 1.0
E
0.5
0.8
0.4
0.20
0.15
c
0.10
0.05
Rosedale and Locust
July 8 2013 storm with ADWFR starting July 10
Max Wet Flow Rate (0.659 mgd):0.70 Ave Dry Flow Rate (0.507 mgd):0.52 Cumulative Rainfall (1.350 in):0.00
v v -
ADFR 0.507 mgd
U
Pj
g
0
0.00 1 I I
7 Sun 8 Mon 9 Tue 10 Wed 11 Thu 12 Fri 13 Sat
Jul 2013 7/6/2013 12:00:00 PM - 7/13/2013 12:00:00 PM
Sewershed 11
Total Meter: MH SAN S 04685 606 West Locust St.
Determine Incremental Inflow and Infiltration, (gpd) /(in *mile)
Basin No.
Pipe Diameter,
Inches
Length of Sewer, FT
Length of Sewer, Mile
in *mile
Partial 13
8
717.20
0.14
1.09
8
7,033.44
1.33
10.66
12
2,088.49
0.40
4.75
11 -2
6
160.69
0.03
0.18
8
9,475.46
1.79
14.36
11-3
6
1,137.47
0.22
1.29
8
4,731.05
0.90
7.17
11 -4
6
3,643.55
0.69
4.14
8
18,824.32
3.57
28.52
12
282.89
0.05
0.64
11 -5
6
2,224.28
0.42
2.53
8
8,271.96
1.57
12.53
12
2,593.42
0.49
5.89
Partial 11 -5
12
174.10
0.03
0.40
Total
11.62
94.15
Measured Flow time Period 7/6/2013 through 7/13/2013 Rain Event on 7/8/2013
530,000.00 gallons, Maximum Wet Weather Flow 7 days
405,000.00 gallons, Average Dry Weather Flow 7 days
75,714.29 gpd Maximum Wet Weather Flow (Average)
57,857.14 gpd Average Dry Weather Flow
Difference, Max -Ave GPD of 1/1 = 17,857.14
Result of 1/1 Determination: Not Excessive 1/1
GPD /in *mile= 189.67
1.5
7)1.0
E
0.5
0.6
0.5
g 0.4
0.3
0.2
0.15
0.10
0.05
606 W Locust and Foye
July 8 2013 storm with ADWFR starting July 10
Max Wet Flow Rate (0.530 mgd):0.58 Ave Dry Flow Rate (0.405 mgd):0.45 Cumulative Rainfall (1.350 in):0.00
ADFR 0.405 mgd
1
0.00 I I 1
7 Sun 8 Mon 9 Tue 10 Wed 11 Thu 12 Fri 13 Sat
Jul 2013 7/6/2013 12:00:00 PM - 7/13/2013 12:00:00 PM
Sewershed 11
Sub Meter: MH SAN 04701 1098 W. Locust St.
Determine Incremental Inflow and Infiltration, (gpd) /(in *mile)
Basin No.
Pipe Diameter,
Inches
Length of Sewer, FT
Length of Sewer,
Mile
in *mile
Partial 11 -5
8
3,314.16
0.63
5.02
Total
0.63
5.02
Measured Flow time Period 4/16/2013 through 4/23/2013 Rain Event on 4/18/2013
86,000.00 gallons, Maximum Wet Weather Flow 7 days
33,000.00 gallons, Average Dry Weather Flow
12,285.71 gpd
4,714.29 gpd
7
Maximum Wet Weather Flow (Average)
Average Dry Weather Flow
Difference, Max -Ave GPD of I/1= 7,571.43
Result of I/1 Determination: Excessive I/1
days
GPD /in *mile= 1,507.77
om
0.30
0.25
0.20
g0.15
0.10
0.05
0.00
0.20
0.15
E 0.10
0.05
0.00
0.12
0.10
0.08
. 0.06
0.04
0.02
0.00
17 Wed 18 Thu 19 Fri 20 Sat 21 Sun 22 Mon 23 Tue
Apr 2013 4/16/2013 12:00:00 PM - 4/23/2013 12:00:00 PM
1098 W locust
April 18 2013 storm with ADWFR starting July 10
Max Wet Flow Rate (0.086 mgd):0.08 Ave Dry Flow Rate (0.033 mgd):0.05
Cumulative Rainfall (2.940 in):0.00
ADFR 0.033 mgd
I
o
1
1
APPENDIX B - SEWERSHED 7 FLOW
METER LOCATIONS
Sewershed 7: Flow Meter Locations
0"
v
c�
m
cn
v
BOYER ST
KANE.
ti
O1
O
GS, p T
c s
�Fo SON �'W28THS
S)' PUTNAM ST
BERKLEY PL
0
s ,
�
ST � O9� 0 G� I N
� N gHT
ENNE
P
/N
. �
yu 0 Q
�Z
Q Z. A
m m a
-
v1 O 4 AA
a< F
v �y ,
6 S C
e
r
a
A
-It
LINK ST
Cr
4
N
Ir.-Kaufmann Ave
N�
auf n4 u
T
k
r
i, t
-0
2
NAPIER ST
y 474
RG
OwELL ST E R o
o
_o O NALMOND ST o
•
$ W
U'
W LOCUST
06
2
C/
m V
Legend
- - - Road Centerline
Sanitary Sewershed
Sewershed ID
Ell 7-1
I� 1 7 -2
7 -3
7-4
N
Meter Locations
APPENDIX C - SEWERSHED 5
FLOW METER LOCATIONS AND
PRELIMINARY DATA
Sewershed 5: Flow Meter Locations
FOR EST MEADOW
m 42-
z
z 1.
rn
0
73 <et HONEYSUCKLE LN
BITTERSWEET LN
5-2
01004'
LS DR
416 ARBOR °IL s1.14
NNOOD
DAVID DR SPRING VALLEY RD
Carter Rd D..tt
t)
0 0 m
C
to z 0
C z
0
m
z
m 0
p
H1LLCREST RD Cims
I s_
:I ! t_l___I __
KEYSTONE DR
5-4
46'...91,6'.0
.....4> .4 '
0
0
r- ' • 7
3=. c.
Z 'a'
en
X 0 '
M
W 32ND ST
-7
Is •
o
o cict
11
1:11:t –: 731> t ' Ici).
: --
-----1-*
zi ih-------114-___,...-
2
t_ 0
CENIC VIEW DR
S
: TcoRusT cERRtOR -;
Fj KAUFMANN AVE
xl
JEFFREYR
t 9
0 0 CO
.0 CV 0
AS , MONTCREST ST
(1 5
IF
COTTAGE PL
TA
z..0 WELL ELL ST
4(f
co
42
7 -
FAIRWAY DR
UNGS ST
SUNNYVIEW DR
CLARKE DR
ROSEDALE AVE
Legend
Sanitary Sewershed
Sewershed ID
5-1
5-2
5-3
r I 5-4
5-5
Meter Location
•
Sewershed 5
Meter Location: Carter Road and W 32nd Street
Determine Incremental Inflow and Infiltration, (gpd) /(in *mile)
Basin No.
Pipe Diameter,
Inches
Length of Sewer,
FT
Length of Sewer, Mile
in *mile
5-1
8
12,323.29
2.33
18.67
10
3,576.37
0.68
6.77
12
278.89
0.05
0.63
18
2,452.35
0.46
8.36
5 -2
8
12,081.26
2.29
18.31
10
1,642.75
0.31
3.11
2
434.24
0.08
0.16
4
1,080.00
0.20
0.82
6
834.55
0.16
0.95
5 -3
8
55,098.85
10.44
83.49
12
7,149.19
1.35
16.25
18
420.67
0.08
1.43
5-4
8
13,061.60
2.47
19.79
12
2,489.13
0.47
5.66
5 -5
6
437.73
0.08
0.50
8
15,434.10
2.92
23.39
10
136.90
0.03
0.26
12
666.20
0.13
1.51
Total
24.55
210.06
Measured Flow :4/16/2013 through 4/23/2013 for Rain Event 4/18/2013
1,275,000.00 gallons, Maximum Wet Weather Flow 7 days
422,000.00 gallons, Average Dry Weather Flow 7 days
182,142.86 gpd Maximum Wet Weather Flow (Average)
60,285.71 gpd Average Dry Weather Flow
Difference, Max -Ave GPD of 1/1 = 121,857.14
Result of 1/1 Determination: Not Excessive 1/1
GPD /in *mile= 580.101
Carter rd and w 32nd south line
April 18 2013 Storm
Wet Total Flow (8.929 mgal):0.00 DWF Total (2.957 mgal):0.00
Wet Flow Rate (1.275 mgd):0.33 ADWF Rate (0.422 mgd):0.44
0.06
0.05
0.04
�a
c 0.03 —
0.02 -
0.01-
0.00
6
4
0'3
17 Wed
Apr 2013
1 1
18 Thu 19 Fri 20 Sat 21 Sun
4/16/2013 12:00:00 PM - 4/23/2013 12:00:00 PM
22 Mon
23 Tue
Sewershed 5
Meter Location: Carter Road and W 32nd Street
Determine Incremental Inflow and Infiltration, (gpd) /(in *mile)
Basin No.
Pipe Diameter,
Inches
Length of Sewer,
FT
Length of Sewer, Mile
in *mile
5 -1
8
12,323.29
2.33
18.67
10
3,576.37
0.68
6.77
12
278.89
0.05
0.63
18
2,452.35
0.46
8.36
5 -2
8
12,081.26
2.29
18.31
10
1,642.75
0.31
3.11
2
434.24
0.08
0.16
4
1,080.00
0.20
0.82
6
834.55
0.16
0.95
5 -3
8
55,098.85
10.44
83.49
12
7,149.19
1.35
16.25
18
420.67
0.08
1.43
5 -4
8
13,061.60
2.47
19.79
12
2,489.13
0.47
5.66
5 -5
6
437.73
0.08
0.50
8
15,434.10
2.92
23.39
10
136.90
_ _ 0.03
0.26
12
666.20
0.13
1.51
Total
24.55
210.06
Measured Flow :5/1/2013 through 5/8/2013 for Rain Event 5/3/2013
583,000.00 gallons, Maximum Wet Weather Flow 7 days
422,000.00 gallons, Average Dry Weather Flow 7 days
83,285.71 gpd Maximum Wet Weather Flow (Average)
60,285.71 gpd Average Dry Weather Flow
Difference, Max -Ave GPD of I/I = 23,000.00
Result of I/I Determination: Not Excessive 1/I
GPD /in *mile= 109.49
Carter rd and w 32nd south line
May 3 2013 Storm
Wet Total Flow (4.088 mgal):0.00
Wet Flow Rate (0.583 mgd):0.41
DWF Total (2.957 mgal):0.00
ADWF Rate (0.422 mgd):0.44
0.016
0.014-
0.012
rn0.010
0.008
0.006
0.004'
0.002
1.6-
1.4
1.2
-,1.0 _
E -
0.8 0.6 -
0.4
0.2—
2 Thu
May 2013
3 Fri 4 Sat 5 Sun 6 Mon
5/1/2013 12:00:00 PM - 5/8/2013 12:00:00 PM
7 Tue
8 Wed
Sewershed 5
Meter Location: Carter Road and W 32nd Street
Determine Incremental Inflow and Infiltration, (gpd) /(in *mile)
Basin No.
Pipe Diameter,
Inches
Length of Sewer,
FT
Length of Sewer, Mile
in *mile
5 -1
8
12,323.29
2.33
18.67
10
3,576.37
0.68
6.77
12
278.89
0.05
0.63
18
2,452.35
0.46
8.36
5 -2
8
12,081.26
2.29
18.31
10
1,642.75
0.31
3.11
2
434.24
0.08
0.16
4
1,080.00
0.20
0.82
6
834.55
0.16
0.95
5 -3
8
55,098.85
10.44
83.49
_ 12
7,149.19
1.35
16.25
18
420.67
0.08
1.43
5 -4
8
13,061.60
2.47
19.79
12
2,489.13
0.47
5.66
5 -5
6
437.73
0.08
0.50
8
15,434.10
2.92
23.39
10
136.90
0.03
0.26
12
666.20
0.13
1.51
Total
24.55
210.06
Measured Flow :7/6/2013 through 7/13/2013 for Rain Event 7/8/2013
514,000.00 gallons, Maximum Wet Weather Flow 7 days
422,000.00 gallons, Average Dry Weather Flow 7 days
73,428.57 gpd Maximum Wet Weather Flow (Average)
60,285.71 gpd Average Dry Weather Flow
Difference, Max -Ave GPD of 1/1 = 13,142.86
Result of 1/1 Determination: Not Excessive 1/I
GPD /in *mile= 62.57
Carter rd and w 32nd south line
July 8 2013 Storm
Wet Total Flow (3.608 mgal):0.01 DWF Total (2.957 mgal):0.00
Wet Flow Rate (0.514 mgd):0.65 ADWF Rate (0.422 mgd):0.44
0.030
0.025
0.020
rn -
F 0.015-
0.010
0.005 ` �•�
3.5—
3.0
2.5
7 Sun
Jul 2013
8 Mon 9 Tue 10 Wed 11 Thu
7/6/2013 12:00:00 PM - 7/13/2013 12:00:00 PM
12 Fri
13 Sat
Sewershed 5
Meter Location 1951 W. 32nd
Determine Incremental Inflow and Infiltration, (gpd) /(in *mile)
Basin No.
Pipe Diameter,
Inches
Length of Sewer, FT
Length of Sewer, Mile
in *mile
5 -1
8
7,429.38
1.41
___
11.26
10
3,466.06
0.66
6.56
Part 5 -2
8
12,081.26
2.29
18.31
10
1,642.75
0.31
3.11
2
434.24
0.08
0.16
4
1,080.00
0.20
0.82
6
834.55
0.16
0.95
Total
5.11
41.17
Measured Flow: 4/16/2013 through 4/23/2013 for Rain Event 4/18/2013
79000 gallons, Maximum Wet Weather Flow
7
days
24000 gallons, Average Dry Weather Flow 7 days
11,285.71 gpd
1,612.24 gpd
Maximum Wet Weather Flow (Average)
Average Dry Weather Flow
Difference, Max -Ave GPD of 1/1 = 9,673.47
Result of 1/1 Determination: Not Excessive 1/I
L
GPD /in *mile= 234.97
1951 W32nd
April 18 2013 Storm
Wet Total Flow (0.552 mgal):0.00
Wet Flow Rate (0.079 mgd):0.02
DWF Total (0.165 mgal):0.00
ADWF Rate (0.024 mgd):0.07
0.005
0.004
- 0.003
rn
E
0.002—
0.001—
0.000
0.5—
0.4—
0)0.3
0.2 —
0.1—
0.0
it
17 Wed
Apr 2013
a,.
'
v
18 Thu
19 Fri 20 Sat 21 Sun
4/16/2013 12:00:00 PM - 4/23/2013 12:00:00 PM
22 Mon 23 Tue
Sewershed 5
Meter Location 1951 W. 32nd
Determine Incremental Inflow and Infiltration, (gpd) /(in *mile)
Basin No.
Pipe Diameter,
Inches
Length of Sewer, FT
Length of Sewer, Mile
in *mile
5 -1
_
8
_
7,429.38
1.41
11.26
10
3,466.06
0.66
6.56
Part 5 -2
8
12,081.26
2.29
18.31
10
1,642.75
0.31
3.11
2
434.24
0.08
0.16
4
1,080.00
0.20
0.82
6
834.55
0.16
0.95
Total
5.11
41.17
Measured Flow: 5/1/2013 through 5/8/2013 for Rain Event 5/3/2013
28,000 gallons, Maximum Wet Weather Flow 7 days
24,000 gallons, Average Dry Weather Flow
4,000.00 gpd
571.43 gpd
7
Maximum Wet Weather Flow (Average)
Average Dry Weather Flow
Difference, Max -Ave GPD of 1/1 = 3,428.57
Result of 1/1 Determination: Not Excessive 1/1
days
GPD /in *mile= 83.28
1951 W32nd
May 3 2013 Storni
Wet Total Flow (0.194 mgal):0.00
Wet Flow Rate (0.028 mgd):0.02
DWF Total (0.165 mgal):0.00
ADWF Rate (0.024 mgd):0.07
0.0008
0.0007=
0.0006 _
— a 0.0005 -
c
rn -
E 0.0004-
0.0003=2.
0.0002
0.0001
1
I I J
T I�
0.14
0.12-
0.10-
77)0.08
E -
0.06
0.04
0.02-
0.00
to
II
2 Thu
May 2013
3 Fri 4 Sat 5 Sun 6 Mon
5/1/2013 12:00:00 PM - 5/8/2013 12:00:00 PM
7 Tue
8 Wed
rn
F
0.04-
0.03 -
0.02-
0.01-
3
F
2
45 W 32nd
April 18 2013 Storm
Wet Total Flow (9.918 mgal):0.01
Wet Flow Rate (1.415 mgd):0.90
DWF Total (5.375 mgal):0.01
ADWF Rate (0.767 mgd):0.83
17 Wed
Apr 2013
i I I
18 Thu 19 Fri 20 Sat 21 Sun
4/16/2013 12:00:00 PM - 4/23/2013 12:00:00 PM
22 Mon
23 Tue
45 W 32nd
May 3 2013 Storm
Wet Total Flow (6.773 mgal):0.01 DWF Total (5.375 mgal):0.01
Wet Flow Rate (0.968 mgd):0.77
ADWF Rate (0.767 mgd):0.83
0.018 L
0.016-1
0.014 —
Ts 0.012
rn
F
0.010
0.008
0.006 —
1.8
1.6
1.4
-0 1.2
rn
1.0
0.8
0.6
0.4
2 Thu
May 2013
1 1 1
4 Sat 5 Sun 6 Mon
5/1/2013 12:00:00 PM - 5/8/2013 12:00:00 PM
7 Tue
8 Wed
0.025
0.020
rn0.015
E
0.010
45 W 32nd
July 8 2013 stone
Wet Total Flow (5.718 mgal):0.01
Wet Flow Rate (0.816 mgd):0.99
DWF Total (5.375 mgal):0.01
ADWF Rate (0.767 mgd):0.83
0.5—
7 Sun
Jul 2013
8 Mon 9 Tue 10 Wed 11 Thu
7/6/2013 12:00:00 PM - 7/13/2013 12:00:00 PM
12 Fri
13 Sat