1k Approval of NPDES, Phase II
CITY OF
CHANHASSEN
7700 Market Boulevard
PO Box 147
Chanhassen, MN 55317
Administration
Phone 952.227.1100
Fax 952.227.1110
Building Inspections
Phone 952.2271180
Fax 952.227.1190
Engineering
Phone 952.227.1160
Fax 952.2271170
Finance
Phone 952.2271140
Fax 952.227.1110
Park & Recreation
Phone 952.227.1120
Fax 952.2271110
Recreation Center
2310 Coulter Boulevard
Phone 952.2271400
Fax 952.227.1404
Planning &
Natural Resources
Phone 952.2271130
Fax 952.2271110
Public Works
1591 Park Road
Phone 952.227.1300
Fax 952.227.1310
Senior Center
Phone 952.2271125
Fax 952.2271110
Web Site
www.ci.chanhassen.mn.us
-If<
MEMORANDUM
To: Todd Gerhardt, City Manager
From: Lori Haak, Water Resources Coordinator .
Don Asleson, Natural Resources Technician (:)~
Date: February 22, 2005
Re: National Pollutant Discharge Elimination System (NPDES) Phase II
Municipal Separate Storm Sewer System (MS4) Permit 2004 Annual
Report
SUMMARY
Staff is requesting the City Council authorize the Mayor to sign the annual
report for submittal to the Minnesota Pollution Control Agency (MPCA).
ACTION REQUIRED
A simple majority vote of City Council present.
BACKGROUND
At the January 24 City Council meeting, the Council held a public hearing on
the NPDES Phase II MS4 Permit 2004 Annual Report. No public comments
were made during the hearing. The report was not complete at that time.
Council requested the report be brought back for approval once the report was
complete. The completed annual report is attached.
RECOMMENDA TION
Staff recommends the City Council adopt the following motion: "The
Chanhassen City Council authorizes the Mayor to sign the City's NPDES
Phase II MS4 General Permit annual report, as attached to this report."
ATTACHMENTS
1. NPDES Phase II MS4 General Permit annual report
G:\ENG\Lori\NPDES Phase II\MS4 Permit\2004 Annual Report\CC 022805.doc
The City of Chanhassen · A growing community with clean lakes, quality schools, a charming downtown, thriving businesses, winding trails. and beautiful parks A great place to live work, and play.
By completing this annual report form, you are "providing the Minnesota Pollution Control
Agency (MPCA) with a summary of your status of compliance with permit conditions,
including an assessment of the appropriateness of your identified best management practices
and progress towards achieving your identified measurable goals for each of the minimum
control measures" as required by the MS4 Permit. Use of this form is not mandatory;
however, you must address all the questions and cross reference in a clear format.
Name of MS4: City of Chanhassen
Contact Person: Lori Haak
Telephone Number: (952) 227-1135
Address: P.O. Box 147
Chanhassen
(city)
MN
(state)
55317
(zip code)
1. Public Education and Outreach on Stormwater
1m acts
a. Did you hold a public meeting on Yes ~
your Stormwater Pollution
Prevention Program (SWPPP)?
[Part V.G.l.e]
b. How many individuals attended?_O_
c. If you did not comply with this requirement, explain why. Please attach a separate
sheet labeled lc.
d. What was the date of the public meeting? 1/24/05
e. In what newspaper or publication of general interest did you publish the public notice
of your meeting? [Part V.G.l.e.2] _Chanhassen VilIager_
f. On what date was it published? _12/23/04_
NOTE: Please retain a copy of the public notice in your records.
You must hold your ublic meetin before March 10, 2005.
g. You must implement a public education program to distribute educational materials to
the community or conduct equivalent outreach activities about the impacts of
stormwater discharges on water bodies and the steps that the public can take to reduce
ollutants in stormwater runoff. Please rovide a status u date concerning your e orts
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in developing this program. Please provide your response below or attach a separate
sheet labeled 1 g.
12: Status of public education pr02ram development
The 2004 - 2008 Educational Activities Implementation Plan (EAIP) will take a
community based approach to stormwater education. The City of Chanhassen plans to continue
its current practices for public education including the use of the Chanhassen web page, water
quality hotline, and articles in the community newspaper and newsletter. In 2005 Chanhassen
will have an additional opportunity to communicate stormwater education with the addition of
the "Maple Leaf' a monthly insert in the Chanhassen Villager newspaper. With the "Chanhassen
Connection" and "Maple Leaf' newsletters Chanhassen hopes to bring timely information and
suggestions to residents that will help empower them to take action to improve water quality
within the City.
As part of the 2004-2008 EAIP Chanhassen has updated its web page dedicated to
understanding NPDES MS4 requirements and actions currently happening with the program.
The web page also includes links to alternate resources if additional information is needed. The
water quality hotline is also updated to include the latest water resource information in
Chanhassen.
Outreach activities that are planned with the 2004-2008 EAIP include offering materials
and presentations to area education professionals and students. Installation of interpretive
signage in public areas is planned to allow for a more interactive learning process. In addition to
the quarterly newsletters, Chanhassen plans to distribute brochures to increase awareness of
water quality issues facing Chanhassen.
The City of Chanhassen will also provide educational opportunities to staff in the
following areas: park and open space maintenance, fleet and building maintenance, new
construction and land disturbance and stormwater system maintenance.
h. You must specifically implement an education program that individually addresses each
Minimum Control Measure:
1) Public education and outreach;
2) Public participation;
3) Illicit discharge detection and elimination;
4) Construction site stormwater runoff control;
5) Post-construction stormwater management in new development and
redevelopment; and
6) Pollution prevention/good housekeeping for municipal operations.
Please provide a status update concerning your efforts to implement this education
program for each of the Minimum Control Measures. Provide your response below
or provide a separate sheet labeled 1 h.
Ih: MCM education efforts status update
1. Public education and outreach
During the 2004-2005 permit cycle the public education and outreach educational
minimum control measures (MCMs) were implemented as scheduled in the permit cycle.
To summarize the educational activities that occurred during the 2004-2005 permit cycle
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the following actions have been completed:
The 2004- 2008 Educational Activity Implementation Plan has been developed. The
water quality hotline and web page were updated to include the latest activities that the
city has undertaken for the NPDES (MS4) permit. A 30 day notice was given for the
public hearing during the City Council meeting on January 24, 2005. The meeting was
used to address the City Council on the current standing of NPDES (MS4) activities in
addition to allowing public input for the NPDES permit. During the public hearing no
oral public input was submitted. No other written public comments were submitted.
In addition to the public hearing offered, six (6) Chanhassen Connection articles were
published during the 2004 permit cycle.
The Stormwater Utility Bill insert survey responses were compiled to assist in the
development of the 2004-2008 EAIP.
Outreach activities within the 2004-2005 permit cycle included a presentation to local
Boy Scout troop assisting them with their water quality education. The 2004-2008 EAIP
includes a plan of offering stormwater education assistance to educational professionals
and students.
2. Public participation
The 2004-2005 permit cycle educational MCMs for public participation included the
development of the 2004-2008 EAIP, the update of the City web page and the water
quality hotline update. The annual public meeting was conducted on January 24,2005
during the City Council Meeting. At the meeting no oral public input was submitted. No
other written public comments were submitted.
3. Illicit discharge detection and elimination
Educational MCMs for illicit discharge detection and elimination were completed for the
2004-2005 permit cycle with the development of the 2004-2008 EAIP. The City web
page was updated to include the latest information for stormwater issues and NPDES
MS4 permit. The surface water management hotline was also updated as part of the
2004-2005 activities.
4. Construction site stormwater runoff control.
Educational MCMs for construction site stormwater runoff control for the 2004-2005
permit cycle were completed with the development of the 2004-2008 EAIP. The City
web page has been updated to include the latest information for stormwater issues and
NPDES MS4 permit. The surface water management hotline was also updated as part of
the 2004-2005 activities.
5. Post-Construction stormwater management in new development and
redevelopment.
Post Construction stormwater management educational MCMs were addressed during
the 2004-2005 permit cycle with the development of the 2004-2008 EAIP.
6. Pollution prevention/good housekeeping for municipal operations
Pollution prevention and good housekeeping education MCM activities during the 2004-
2005 permit cycle included the development of the 2004-2008 EAIP. In the 2004-2008
EAIP training presentations and workshops are planned for staff personnel. Training
areas for staff will include park and open space maintenance, fleet and building
maintenance, new construction and land disturbance and stormwater system
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maintenance.
Training provided to staff during the 2004-2005 permit cycle included: road salt
application, communication procedures with Carver Soil &Water Conservation District,
ASIST database management, non-point source pollution, stormwater management,
maintenance of stormwater infrastructure, and erosion and sediment control.
2. Public Participation/involvement
a. During your public meeting, did you Y es ~
receive written and/or oral input on
your SWPPP? [Part V.G.2.b.I-3]
NOTE: Input must be considered prior to
submittal of your annual report.
b. Did you create a record of comments Yes Ne
and your response to
comments/record of decision
(ROD)?
c. Have you kept the ROD in Y es ~
accordance with the permit? [Part
V.G.2.b]
d. Do you plan to incorporate any Y es ~
comments into your next SWPPP
update? [Part V.G.2.c]
3. Illicit Dischar2e Detection and Elimination
You must develop, implement and enforce a program to detect and eliminate illicit
discharges as defined at 40 CFR 122.26(b)(2) into your SWPPP. You must also select and
implement a program of appropriate BMPs and measurable goals for this minimum control
measure.
a. You must develop, if not already completed, a storm sewer system map
showing the location of:
1) Ponds, streams, lakes and wetlands that are part of your system;
2) Structural pollution control devices (grit chambers, separators, etc.) that
are part of your system;
3) All pipes and conveyances in your system, as a goal-but at minimum-
those pipes that are 24 inches in diameter and over;
4) Outfalls, including discharges from your system to other MS4s, or waters
and wetlands that are not part of your system (where you do not have
operational control); structures that discharge stormwater directly into
groundwater; overland discharge points and all other points of discharge
from your system that are outlets, not diffuse flow areas.
Please provide a summary of your efforts in developing this map. Provide your response below
or use a separate sheet labeled 3a.
3a: Storm sewer map development
The City of Chanhassen is currently in the process of updating its 1994 Surface Water
Management Plan (SWMP). The update of this document is anticipated to be completed
December 2005. Included in the contract with the consultant is the task of inventorying all
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storm water infrastructure within Chanhassen. Infrastructure to be inventoried includes all lakes,
ponds, streams, stormwater pipes, structural pollution control devices and outfalls. All
conveyance features will be surveyed to collect x-y positions and collector lines will have the
invert (z) data collected in addition to the x-y data. All data will be mapped with ArcMap once
the data collection is complete. Approximately 1,125 structures have been inspected and
inventoried to date out of an estimated 4,500 (approximately 25% of all structures).
b. You must, to the extent allowable under law, effectively prohibit, through
ordinance or other regulatory mechanism, non-stormwater discharges from
entering into your storm sewer;
c. You must develop and implement a program to detect and address non-
stormwater discharges, including illegal dumping, to your system;
d. You must inform employees, businesses, and the general public in your MS4
area of hazards associated with illegal discharges and improper disposal of
waste;
e. You must address the following categories of non-stormwater discharges or
flows (i.e., illicit discharges), only if you identify them as significant
contributors of pollutants to your small MS4:
water line flushing, landscape irrigation, diverted stream flows, rising ground
waters, uncontaminated ground water infiltration (as defined at 40 CFR
35.2005(20)), uncontaminated pumped ground water, discharges from potable
water sources, foundation drains, air conditioning condensation, irrigation
water, springs, water from crawl space pumps, footing drains, lawn watering,
truck and car washing, flows from riparian habitats and wetlands, dechlorinated
swimming pool discharges, and street wash water, discharges or flows from fire
fighting activities.
Please provide a status update concerning your efforts to meet these permit
conditions. Please provide your response below or provide a separate sheet
labeled 3b-e.
3b-e: Illicit dischar2e permit conditions
b. Regulatory mechanism for prohibiting non-stormwater discharges from entering
storm sewer.
Chanhassen City Code Sec. 19-128 and Sec. 19-130 regulate non-stormwater discharges.
Upon SWMP Update completion, current ordinances will be re-assessed for
effecti veness.
c. Program to detect and address non-stormwater discharges
Chanhassen has created a web page directing residents to the water quality hotline for
complaints or concerns regarding non-stormwater discharges. Additionally, the City of
Chanhassen has developed a procedure flowchart for handling both hazardous and non-
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hazardous illicit discharges if they are discovered. The water quality hotline was created
to provide residents an effective way to ask surface water related questions and/or report
non-stormwater discharges.
d. Inform general public of hazards associated with illegal discharges and improper
waste disposal.
The 2004-2008 EAIP addresses education of employees, businesses and the general
public of illegal discharge and improper disposal activities and the associated effects of
such practices. During the 2004-2005 permit cycle approximately 350 brochures that
offer stormwater information were distributed by volunteers to neighborhoods in
Chanhassen. Continued use of brochures to inform residents on hazards of illicit
discharges will be continued with the 2004-2008 EAIP.
4. Construction Site Stormwater Runoff Control
You must develop, implement, and enforce a program to reduce pollutants in any
stormwater runoff to your small MS4 from construction activities within your jurisdiction
that result in a land disturbance of greater than or equal to one acre or is less than one acre
but is part of a common plan of development that will be one acre or greater. You must
also select and implement a program of appropriate BMPs and measurable goals for this
minimum control measure, at minimum:
a. An ordinance or other regulatory mechanism to require erosion and sediment
controls, as well as sanctions to ensure compliance, to the extent allowable
under law. These ordinances or regulatory mechanisms must be in place by
March 11, 2005;
b. Requirements for construction site operators to implement appropriate erosion
and sediment control best management practices;
c. Requirements for construction site operators to control waste, such as discarded
building materials, concrete truck washout, chemicals, litter, and sanitary waste
at the construction site that may cause adverse impacts to water quality;
d. Procedures for site plan review which incorporate consideration of potential
water quality impacts;
e. Procedures for receipt and consideration of reports of non compliance or other
information on construction related issues submitted by the public, and
f. Procedures for site inspection and enforcement of control measures.
Please provide a status update concerning your efforts to meet this permit
condition. Please provide your response below or provide a separate sheet
labeled 4.
4: Construction site runoff control
Chanhassen has two ordinances that require erosion and sediment control. The
ordinances also require construction site operators to implement appropriate BMPs on
construction sites. To ensure compliance the City of Chanhassen reserves the right to
issue a stop work order for non-compliance. Items listed within 4 c & d of the annual
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report will be addressed upon completion of the 2004 Surface Water Management Plan
Update.
In addition to the ordinances listed above, Chanhassen has formed a cooperative effort
with Carver Soil and Water Conservation District (CSWCD). CSWCD assists the City
with the review of erosion and sediment control plans in addition to construction site
erosion and sediment control inspections designed to ensure compliance by the
contractors as well as technically assisting site operators with erosion and sediment
control. During the 2004-2005 permit cycle, Carver Soil and Water Conservation District
was able to complete 210 inspections on 20 active construction sites.
The water quality hotline is one additional way that construction related erosion and
sediment control related issues may be reported.
5. Post-construction Stormwater Management in New Development and Redevelopment
You must develop, implement, and enforce a program to address stormwater runoff from
new development and redevelopment projects within your jurisdiction that disturb greater
than or equal to one acre, including projects less than one acre that are part of a larger
common plan of development or sale that discharge into your small MS4. Your program
must ensure that controls are in place that would prevent or reduce water quality impacts.
You must also select and implement a program of appropriate BMPs and measurable
goals for this minimum control measure. At minimum:
a. Develop and implement strategies which include a combination of structural
and/or non-structural best management practices (BMPs) appropriate for your
community;
b. Use an ordinance or other regulatory mechanism to address post-construction
runoff from new development and redevelopment projects to the extent
allowable under law; and
c. Ensure adequate long-term operation and maintenance of BMPs installed as a
result of these requirements.
Please provide a status update concerning your efforts to meet this permit
condition. Please provide your response below or provide a separate sheet
labeled 5.
5: Post-Construction stormwater mana2ement in new development and re-development
a) Post construction program summary
During the 2004-2005 permit cycle the City of Chanhassen has developed a spreadsheet
to track the use of its non-structural BMPs that are installed within new developments.
BMPs that would be considered a part of the non-structural classification include: Buffer
Strips, Excavated Conveyance Features, Detention Basins and Post-Construction
Vegetation.
City ordinances for post-construction stormwater management will be revisited upon
~ompl~tion of the Surface Water Management Plan Update (SWMP). One of the work
IteT?s m the contract for the SWMP update is the task of making suggestions to improve
ordmances and or suggest areas where ordinances are needed.
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b) Ordinance to address post-construction runoff from new development and re-
development.
City Code Section 18-78 addresses the post construction runoff from new developments
and re-developments.
c) Long term operation and maintenance of BMPs
With the completion of the Surface Water Management Plan the consultant will develop an
Implementation Plan for maintenance activities. With the development of this plan, a
schedule will be developed for maintenance operations for stormwater infrastructure.
Immediate needs will be addressed in this Implementation Plan.
6. Pollution Prevention/Good Housekeepin2 for Municipal Operations
a. You must develop and implement an operation and maintenance program that
includes a training component and has the ultimate goal of preventing or
reducing pollutant runoff from municipal operations. Training materials that
are available from the USEP A, state and regional agencies, or other
organizations may be used as appropriate or modified for your community.
Your program must include employee training to prevent and reduce
stormwater pollution from activities such as park and open space maintenance,
fleet and building maintenance, new construction and land disturbances, and
stormwater system maintenance.
Please provide a status update concerning your efforts in developing a
Pollution Prevention Plan. Please provide your response below or provide a
separate sheet labeled 6a.
6a: Pollution prevention and 200d housekeepin2 for municipal operations
Pollution prevention has been addressed in the 2004-2008 EAIP. Training areas for the
EAIP include park and open space maintenance, fleet and building maintenance, new
construction and land disturbance and stormwater system maintenance. Training that was
provided during the 2004-2005 permit cycle included: road salt application,
communication with Carver Soil and Water Conservation District, ASIST database
management, maintenance of stormwater infrastructure and erosion and sediment
control.
b. Did you identify and inspect all of your structural pollution control Yes ~
devices such as trap manholes, grit chambers, sumps, floatable
skimmers and separators, etc.? [Part V.G.6.b.2]
c. How many structural pollution control devices do you have in your MS4 system?
58
d. How many structural pollution control devices did you inspect?
58
e. Calculate the percentage
100%
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NOTE: If less than 100 % were inspected, please explain why below or on a separate
sheet labels 6e.
f. Did you repair, replace, or maintain any structural pollution control
devices?
Yes ~
g. Briefly, summarize any significant unscheduled (not routine)
maintenance or improvement activities stemming from inspections of
your structural pollution control devices.
What changes have been made to your SWPPP as a result? Please
explain below or attached a separate sheet labeled 6g.
h. Did you identify and inspect at least 20% of your outfalls, sediment
basins, and ponds? [Part V.G.6.b.3]
Yes ~
1. How many outfalls, basins and ponds do you have?
_4500_
2. Indicate if this number known or estimated?
_Estimated
3. How many of you outfalls, sediment basins, or ponds did you
inspect? 1125
4. What percentage is this? _25%_
5. If less than 20% of your outfalls, sediment basins and ponds were
inspected, please explain why below or on a separate sheet labeled
6h-5.
6. Briefly, summarize the dates of completion of major additional
protection measures triggered by your inspections. [Part V.G.6.b.4].
Attach a separate sheet if necessary labeled 6h-6.
7. Additional SWPPP Issues
¥@!! No
a. Did you make a change to any identified best management practices or
measurable goals that were submitted with your permit application?
[Part V.G.6.b.l] If you responded yes, explain under part boo
b. Briefly list the best management practices using their unique identification numbers
you used in your SWPPP or any measurable goals that will be changed in your
updated SWPPP, and why they have changed. Attach a separate sheet if necessary
labeled 7b.
c. Did you rely on any other entities to satisfy any portion of your ¥@e No
SWPPP? If yes, please identify below the entity and for what
acti vities.
9
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d. Do you discharge to waters with a restricted discharge? See
Appendix C Part B; you may view the applicable rules at
www.pca.state.mn.us/water/water mnrules.html. If you need
assistance with this determination, contact Keith Cherryholmes at
(651) 296-6945
Yes
~
If your answer is no, skip ahead to the certification.
If your answer is "yes," please attach the following information below or on a separate
sheet labeled 7 d.
(No response is needed unless there was a change in listing during 2004)
a. A map of the watersheds where your MS4 discharges to the waters with restricted
discharge. (Use a USGS map or equivalent)
b. A narrative estimate of the impervious surfaces where your MS4 discharges to the
waters with restricted discharge (estimated total impervious from land use and
zoning or existing data can be used if available).
c. A narrative estimate of the future / projected impervious surfaces where your MS4
discharges to the waters with restricted discharge (using available zoning or planning
information that may affect your future discharges).
d. A narrative estimate of how your SWPPP can be altered to eliminate new or
expanded discharges to the waters with restricted discharge. This consists of your
preliminary plan to avoid, divert, or eliminate discharges to restricted waters,
whenever possible.
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0.. ner or Operator Certification
The person with overall administrative responsibility for SWPPP implementation must sign the annual report. This person must be duly
authorized and should be the person who signed the MS4 permit application or a successor.
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 gathered and evaluated the information submitted. Based on my inquiry of the person
or persons 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 (Minn. R. 7001.0070). I am aware that there are significant penalties for
submitting false information, including the possibility of fine and imprisonment (Minn. R.
7001.0540).
Authorized Signature (This person must be duly authorized to sign the annual report for the MS4)
Date
Furlong
Thomas
Last Name
P.O. Box 147
First Name
Mayor
Title
Mailing Address
Chanhassen
MN 55317
City
(952) 227-1100
State Zip Code
tfurlong@ci.chanhassen.mn.us
E-Mail Address
Telephone (include area code)
Please submit your annual report by March 10, 2005 to:
MS4 Stormwater Program
Municipal Division
Minnesota Pollution Control Agency
520 Lafayette Road North
St. Paul, Minnesota 55155-4194
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