HomeMy WebLinkAboutStaff Report 5.B 11/07/2016DATE: November 7, 2016
Agenda Item #5.B
TO: Honorable Mayor and Members of the City Council through City Manager
FROM: Dan St. John, F.ASCE — Director, Public Works & Utilities
Larry Zimmer, P.E. — Deputy Director, Public Works & Utilities
SUBJECT: Resolution Authorizing the City Manager to Execute a Cooperative Agreement
with Caltrans to Complete a Water Quality Mitigation Project along Old Corona
Road
RECOMMENDATION
It is recommended that the City Council adopt the attached Resolution Authorizing the City
Manager to Execute a Cooperative Agreement with Caltrans to Complete a Water Quality
Mitigation Project along Old Corona Road.
BACKGROUND
The proposed mitigation project supports Caltrans' effort to upgrade U.S. Highway 101 between
Novato and Petaluma as part of the Marin- Sonoma Narrows HOV Widening Project (MSN).
Caltrans has divided the overall MSN project into six individual contracts. One of which is the
MSN Segment B3, which starts approximately one -half mile south of San Antonio Creek in
Marin County and ends at Kastania Road in Sonoma County. This project phase consists of
realigning the highway to correct substandard horizontal curves; re- profiling the highway to
correct substandard vertical curve sight distance; reducing flood hazard by building a new San
Antonio Creek Bridge at a higher profile to raise it out of the floodplain; and, removing direct
vehicle access to the highway by constructing new frontage roads and converting the existing
northbound lanes to a frontage road once the new lanes are in place. This project resulted in
environmental impacts, most of which are being mitigated by Caltrans. However, new
impervious pavement as part of MSN B3 resulted in additional roadway pollutants, which
requires "off- site" mitigation due to inadequate right -of -way within the 101 corridor.
Consequently, Caltrans requested the assistance of the City of Petaluma to provide an off -site
location that can treat stormwater run -off from 7.19 acres of highway surface within the
Petaluma River watershed. The proposed co -op agreement addresses this need by placing the
project within City right -of -way and provides adequate funding to the City to build and maintain
the project.
DISCUSSION
The proposed project will improve the water filtration and hydraulic carrying capacity of an
existing roadside open ditch adjacent to Old Corona Road of approximately 25 to 30 feet in
width for a distance of 550 linear feet. Downstream of the roadside ditch, flow will be diverted to
two bio- retention basins for further water quality improvement prior to discharge to the Petaluma
River. The roadside ditch, once modified, will treat highway runoff from twin box culverts
carrying Highway 101 runoff from north of the Corona Road overcrossing, flows from the open
ditch running parallel to the west edge of Highway 101, and runoff from the rear edge of an
adjacent new and used auto sales lot. The existing ditch currently has limited wetland or filtration
value, but can be expanded to 13,000 to 16,000 square feet of planted wetland of improved
filtration capacity. Existing biotic value will be preserved, while the remaining portions of the
ditch will be widened, ornamental and invasive plant species removed, and appropriate
vegetation replanted. At the downstream end of the improved channel, an inlet will capture low
flows, and divert it through twin outfalls into two bio - retention basins, totaling approximately
30,000 square feet. These basins will be created within the upland area of an existing flood
terrace along the Denman Reach of the Petaluma River
Upon execution of the cooperative agreement, staff will solicit proposals to design the project.
The design consultant will also be responsible for the environmental documention per CEQA.
The project will come back to Council to approve the environmental document and for award of
the contruction contract prior to beginning construction. Construction is expected in FY 17/18.
FINANCIAL IMPACTS
The total cost of constructing the project and performing the necessary maintenance for a period
of no less than twenty (20) years is estimated to not exceed $1,379,000. All costs associated with
this work will be reimbursed by Caltrans and will be reflected in the FY 17/18 budget proposal.
ATTACHMENTS
1. Resolution
2. Location Map
3. Agreement
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Attachment 1
RESOLUTION AUTHORIZING THE CITY MANAGER TO EXECUTE A
COOPERATIVE AGREEMENT WITH CALTRANS TO COMPLETE A WATER
QUALITY MITIGATION PROJECT ALONG OLD CORONA ROAD
WHEREAS, Caltrans is upgrading U.S. Highway 101 between Novato and Petaluma as
part of the Marin- Sonoma Narrows HOV Widening Project; and
WHEREAS, due to inadequate right of way within the 101 corridor, Caltrans has
requested the assistance of the City of Petaluma to provide an off -site location that treats
stormwater run -off from an equivalent 7.19 acres of highway surface within the Petaluma River
watershed; and
WHEREAS, the City desires to assist Caltrans by implementing the Old Corona Road
Water Quality Mitigation Project; and
WHEREAS, all funding for project shall be reimbursed in fall by Caltrans; and
WHEREAS, staff shall oversee design and construction of project; and
WHEREAS, City and Caltrans agree to enter into a cooperative agreement.
NOW, THEREFORE, BE IT RESOLVED that the City Council of the City of
Petaluma hereby authorizes and directs the City Manager to execute the attached Cooperative
Agreement with Caltrans to treat an equivalent 7.19 acres of highway surface within the
Petaluma River watershed.
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OLD CORONA ROAD
WATER QUALITY MITIGATION
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LOCATION MAP
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Date : November 7, 2016
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Attachment 3
Draft 9 -21 -16 (AH) 04 -MRN 101 PM 27.0/27.6
04 -SON 101 PM 0.0/4.5
MSN B3 Off -site Stormwater Treatment
04- 26409/ 0400000735
District Agreement No. 4 -2557
COOPERATIVE AGREEMENT
THIS AGREEMENT, ENTERED INTO EFFECTIVE on , 2016,
is between the STATE OF CALIFORNIA, acting by and through its Department of
Transportation, referred to herein as " CALTRANS," and the
CITY OF PETALUMA, a
municipal corporation of the
referred to herein as "CITY."
RECITALS
body politic and a
State of California,
CALTRANS and CITY, hereinafter referred to as "PARTIES," pursuant to Streets and
Highways Code sections 114 and /or 130, are authorized to enter into this Agreement.
2. CALTRANS is constructing the U.S. 101 Marin/S onoma Narrows High Occupancy
Vehicle (HOV) Widening Contract B3 project in Sonoma County, referred to herein as
"PROJECT."
3. PROJECT resulted in the addition of 33.80 acres of added or reworked impervious surface
within the jurisdictional boundaries of the State Water Resources Control Board's Region
2, referred to herein as "IMPACTS."
4. The State Water Resources Control Board's Region 2, referred to herein as "WRCB ",
issued to CALTRANS a 401 Certification (CIWQS Place No. 797380), dated January 30,
2014, for PROJECT, referred to herein as "401" and incorporated herein by this reference.
26.32 acres will be mitigated by Caltrans construction project (MSN Contract B3 —
Caltrans EA 04- 264091) and 0.29 acres will be mitigated by using the surplus 0.29 acres
from MSN Contract B I. This co -op addresses the difference of 7.19 acres. As partial
mitigation for IMPACTS, Additional Condition 1 of 401 requires that CALTRANS
provide an off -site location that treats stormwater run -off from an equivalent 7.19 acres of
highway surface within the Petaluma River watershed, referred to herein as
"MITIGATION PROJECT ". The location of the proposed off -site stormwater treatment is
shown in Exhibit C, attached herewith and made a part of this Agreement.
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District Agreement No. 4 -2557
5. CITY desires to assist CALTRANS by implementing MITIGATION PROJECT as set forth
in this Agreement and further described in Exhibit A, attached hereto and made a part of
this Agreement. CITY will also perform any and all required maintenance on the installed
MITIGATION PROJECT for a period of no less than twenty (20) years, subject to
CALTRANS providing the necessary funding for such maintenance pursuant to this
Agreement. CALTRANS will keep maintenance records of the stormwater treatment
system.
6. PARTIES have determined that the total cost of constructing MITIGATION PROJECT and
performing the necessary maintenance for a period of no less than twenty (20) years is
$1,379,000 as detailed in Exhibit B, attached herewith and made a part of this Agreement.
All cost increases are subject to, and will be addressed by, mutual agreement. Either party
may terminate this Agreement, if mutual agreement cannot be reached. In case of such
termination, reasonable costs of winding down the MITIGATION PROJECT work,
including payment of non - cancellable obligations to contractors and suppliers,
demobilization costs and site closure costs, will be MITIGATION PROJECT costs.
7. The terms of this Agreement shall supersede any inconsistent terms of any prior
Memorandum of Understanding (MOU) or agreement relating to PROJECT.
8. PARTIES now define herein below the terms and conditions under which this Agreement
will be implemented.
SECTION I
CITY AGREES:
1. All work performed by CITY, or performed on CITY's behalf, shall be performed in
accordance with all state and federal laws, regulations, policies, procedures, and standards.
2. To implement MITIGATION PROJECT as described in Exhibit A, attached hereto and
made a part of this Agreement. In the event that a subsequent amendment or modification
of Additional Condition 1 of 401 by the WRCB results in additional work not covered by
this Agreement (referred to herein as "ADDITIONAL WORK "), this Agreement will be
amended to include the completion of ADDITIONAL WORK as well as any additional
funding required for the completion of said ADDITIONAL WORK by signed agreement of
both parties.
3. To perform all necessary maintenance as described in Exhibit A on the completed
MITIGATION PROJECT facilities, currently on CITY's right of way, for a period of no
less than twenty (20) years. Thereafter, MITIGATION PROJECT facilities shall be
retained as part of CITY's inventory.
4. CITY shall submit an annual maintenance report in electronic format on the Bioretention
Unit to CALTRANS by October 1St each year for twenty (20) years as described in Exhibit
A.
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District Agreement No. 4 -2557
5. To submit one invoice to CALTRANS within thirty (30) calendar days of execution of this
Agreement in the amount of $100,000, which represents the initial deposit for work
performed pursuant to this Agreement. To submit, thereafter, to CALTRANS itemized
invoices monthly and in arrears for costs incurred for work performed related to
MITIGATION PROJECT. Total invoices submitted (including the initial deposit) shall not
exceed the total amount of $1,379,000 as set forth in Exhibit B unless this Agreement is
first amended by agreement of the parties. Said invoices will meet format and content
requirements specified by CALTRANS and shall be submitted to the CALTRANS Project
Manager for approval and forwarding to the appropriate Accounting Office for payment.
6. Within thirty (30) days of receipt of STATE'S first payment of $100,000, to submit written
verification that CITY has deposited $40,000 of that sum into an interest bearing account.
Said $40,000 shall be used by CITY to perform any and all required maintenance activities
on the completed MITIGATION PROJECT facilities. CITY further agrees to deposit any
of CALTRANS' funds that are not utilized to construct PROJECT into said interest bearing
account and to utilize said funds for maintenance activities only.
7. To use one hundred percent (100 %) of CALTRANS' funds provided pursuant to this
Agreement, in order to satisfy CITY's obligation and responsibilities set forth in this
Agreement.
If work performed under this Agreement is done under contract (not completed by CITY's
own employees) and is governed by the California Labor Code's definition of a "public
work" (section 1720(a)(a)), CITY will conform to sections 1720 —1815 of the California
Labor Code and all applicable regulations and coverage determinations issued by the
Director of Industrial Relations.
9. To include wage requirements in all contracts for "public work" and will require their
contractors and consultants to include prevailing wage requirements in all Agreement -
funded subcontracts for "public work."
10. To use all of CALTRANS' funds, including any interest accrued thereon, only on
MITIGATION PROJECT work specified in Exhibit A.
11. To notify CALTRANS in writing five (5) days prior to the construction start date of
MITIGATION PROJECT.
12. To notify CALTRANS in writing and obtain CALTRANS' concurrence prior to making
changes to MITIGATION PROJECT, including changes that may affect the location of
said MITIGATION PROJECT.
13. To submit written notification to CALTRANS when MITIGATION PROJECT
construction has been completed.
14. To retain all books, documents, papers, accounting records, and other evidence pertaining
to costs incurred, including support data for cost proposals, and to make such materials
available at the respective offices of CALTRANS at all reasonable times for three (3) years
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District Agreement No. 4 -2557
after the termination date of this Agreement. CALTRANS, the Federal Highway
Administration, or any duly authorized representative of the Federal Government shall
have access to any books, records, and documents of CITY that are pertinent to this
Agreement for audits, examinations, excerpts, and transactions, and copies thereof shall be
furnished when requested.
SECTION II
CALTRANS AGREES:
1. To provide CITY with a copy of 401 and to subsequently notify and provide copies of all
subsequent amendments thereto, or correspondence, if any, which may affect
MITIGATION PROJECT or maintenance thereof. However, no amendments to the 401
will become amendments to the MITIGATION PROJECT unless and until this Agreement
is amended in accordance with the provisions of Section III herein.
2. To deposit with CITY within thirty (30) calendar days of receipt of CITY's signed invoice,
the amount of $100,000 for the first invoice and thereafter to deposit with CITY within
thirty (30) calendar days after receipt of each subsequent monthly invoice sufficient funds
to satisfy each monthly invoice. The monthly invoice will exclude any annual maintenance
cost, but will include all approved actual costs incurred for work performed related to the
construction of MITIGATION PROJECT. Annual maintenance cost shall be invoiced as
one single invoice in the amount of $225,000 upon completion of construction. The total
amount of all of the invoices, including that for the initial deposit and annual maintenance
cost, will not exceed $1,379,000, which amount represents CALTRANS' total financial
obligation as set forth in this Agreement. Upon receipt of all MITIGATION PROJECT
reports, plans, and other documents submitted by CITY, CALTRANS will review,
comment, approve and forward, if applicable, to State Water Resources Control Board for
approval.
3. To issue at no cost to CITY an encroachment permit for the term of this Agreement to
permit the CITY and /or the CITY's contractors to enter and construct improvements in and
carry out maintenance of the MITIGATION PROJECT within the State Highway System
(SHS) right of way.
SECTION III
IT IS MUTUALLY AGREED:
1. All obligations of CALTRANS under the terms of this Agreement are subject to the
appropriation of resources by the Legislature, State Budget Act authority, and the
allocation of funds by the California Transportation Commission (CTC). All obligations
of CITY under the terms of this Agreement are subject to and conditioned on
reimbursements and continued funding from CALTRANS for the cost of performance of
the MITIGATION PROJECT, as specified elsewhere in Section II of this Agreement.
District Agreement No. 4 -2557
2. All applicable laws, rules and policies relating to the use of federal or state funds shall
apply notwithstanding other provisions of this Agreement.
CITY shall allow representatives of CALTRANS access to the location of the
MITIGATION PROJECT located outside of State Highway System (SHS) right of way for
the purpose of verification and monitoring of performance of MITIGATION PROJECT
and maintenance thereof.
4. CITY agrees to ensure that after MITIGATION PROJECT is constructed, the installed
facilities will be maintained, operated, and managed to all applicable CITY and
CALTRANS standards. CITY will submit a maintenance /operation/management standard
for CALTRANS' review prior to construction of the stormwater treatment system.
5. The party that discovers hazardous material (HM) will immediately notify the other party
to this Agreement.
HM -1 is defined as hazardous material (including but not limited to hazardous waste) that
may require removal and disposal pursuant to federal or state law, whether it is disturbed
by MITIGATION PROJECT or not.
HM -2 is defined as hazardous material (including but not limited to hazardous waste) that
may require removal and disposal pursuant to federal or state law, only if disturbed by
MITIGATION PROJECT.
HM management activities associated with either HM -1 or HM -2 include, without
limitation, any necessary manifest requirements and designation of disposal facility.
6. CALTRANS, independent of MITIGATION PROJECT, is responsible for any HM -1
found within the existing SHS right of way. CALTRANS will undertake, or cause to be
undertaken, HM management activities related to HM -1 with minimum impact to
PROJECT schedule and will pay or cause to be paid all costs associated with HM
management activities related to HM -1.
7. CALTRANS has no responsibility for management activities or costs associated with HM-
1 found outside the existing SHS right of way. If HM -1 is found outside existing SHS right
of way, under state and federal law responsibility for such HM -1 rests with the owner(s) of
the parcel(s) on which the HM -1 is found. If HM -1 is found outside the existing SHS right
of way, parties will reassess the feasibility of the MITIGATION PROJECT and mutually
agree on a course of action prior to the commencement of any additional work.
CITY is responsible for the management of any HM -2 found within MITIGATION
PROJECT limits. CITY may use up to 5% of the funds already obligated by CALTRANS
under this agreement for the costs associated with HM -2 management activities. However,
CALTRANS is not responsible to pay any additional money to CITY for these costs.
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District Agreement No. 4 -2557
9. CALTRANS' acquisition of or acceptance of title to any property on which any hazardous
material is found will proceed in accordance with CALTRANS' policy on such acquisition.
10. In the event that MITIGATION PROJECT facilities are affected by a future CALTRANS
or CITY project, the agency responsible for said project shall replace the affected portion
of MITIGATION PROJECT facilities at no cost to the other party. Any and all required
maintenance of replacement facilities will be completed by CITY with the funding
described in Section I, Article 5 of this Agreement. Any additional costs the CITY incurs
for maintenance due to portions of the MITIGATION PROJECT facilities affected by a
future CALTRANS project will be MITIGATION PROJECT costs.
11. Nothing within the provisions of this Agreement is intended to create duties or obligations
to or rights in third parties not a party to this Agreement or to affect the legal liability of
either party to the Agreement by imposing any standard of care with respect to the
development, design, construction, operation, or maintenance of the SHS and public
facilities different from the standard of care imposed by law.
12. Neither CITY nor any officer or employee thereof is responsible for any injury, damage, or
liability occurring by reason of anything done or omitted to be done by CALTRANS and /or
its agents or contractors under or in connection with any work, authority, or jurisdiction
conferred upon CALTRANS under this Agreement. It is understood and agreed that
CALTRANS will fully defend, indemnify, and save harmless CITY and all of its officials,
officers and employees from all claims, suits, or actions of every name, kind, and
description brought forth under, but not limited to, tortious, contractual, inverse
condemnation, or other theories or assertions of liability occurring by reason of anything
done or omitted to be done by CALTRANS and /or its agents or contractors under this
Agreement.
13. Neither CALTRANS nor any officer or employee thereof is responsible for any injury,
damage, or liability occurring by reason of anything done or omitted to be done by CITY
and /or its agents or contractors under or in connection with any work, authority, or
jurisdiction conferred upon CITY under this Agreement. It is understood and agreed that
CITY will fully defend, indemnify, and save harmless CALTRANS and all of its officials,
officers and employees from all claims, suits, or actions of every name, kind, and
description brought forth under, but not limited to, tortious, contractual, inverse
condemnation, or other theories or assertions of liability occurring by reason of anything
done or omitted to be done by CITY and /or its agents or contractors under this Agreement.
14. No alteration or variation of the terms of this Agreement shall be valid unless made by a
formal amendment executed by the PARTIES hereto and no oral understanding or
agreement not incorporated herein shall be binding on any of the PARTIES hereto.
15. This Agreement shall terminate upon satisfactory completion of MITIGATION PROJECT
or December 31, 2036, whichever comes first. However all indemnification, document
retention, audit, claims, environmental, legal challenge, hazardous material, operation,
maintenance, and ownership articles will remain in effect until terminated or modified in
writing by mutual agreement.
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SIGNATURES
PARTIES declare that:
District Agreement No. 4 -2557
1. Each PARTY is an authorized legal entity under federal law and /or California state law.
2. Each PARTY has the authority to enter into this Agreement.
3. The people signing this Agreement have the authority to do so on behalf of their public
agencies.
STATE OF CALIFORNIA
Department of Transportation
By:
Deputy District Director
Approved as to form and procedure:
Brandon Reeves
Deputy Attorney
Department of Transportation
Certified as to budgeting of funds:
District Budget Manager
Certified as to financial terms and
conditions:
Accounting Administrator
CITY OF PETALUMA
By:
City Manager
Approved as to form:
Attorney
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District Agreement No. 4 -2557
EXHIBIT A
SCOPE OF WORK
This Scope of Work outlines the specific areas of responsibility for completion of the
Bioretention Unit project within the CITY's right of way, which includes environmental
compliance, contract design development, construction administration, maintenance, and
reporting requirements.
Section 1. Bioretention Unit Project
A) CITY shall design, administer /construct and implement a project that improves the water
filtration and carrying capacity of an existing roadside open channel next to Highway 101
near north of Corona Road overcrossing for a distance of 550 linear feet, approximately
25 -30' in width. The project shall be based on the conceptual proposal that was approved
by the San Francisco RWQCB (Attachment 1). The Bioretention Unit shall provide
stormwater treatment for a minimum of 7.19 acres of equivalent of highway impervious
surface.
B) The Bioretention Unit consists of the following elements:
a. Retrofit of existing drainage system, which includes improvement of existing
roadside open ditch and existing pipes
b. Drainage structures to allow the inflow of stormwater into the Bioretention Unit and
the outflow from the Bioretention Unit into CITY drainage system
c. Construction of Bioretention Units with total minimum area of 30,000 SQFT of,
which will include surface planting, tree, and shrub planting around the Bioretention
Units
d. Installation of access road to be used for maintenance of the Bioretention Unit
e. Chain -link fence and gate for maintenance access
Section 2. Environmental Compliance
A) CITY will be the California Environmental Quality Act (CEQA) Lead Agency and
CALTRANS will be the CEQA responsible agency for the Bioretention Unit project
which will be located outside of CALTRANS right of way. CITY shall be responsible
for the preparation of the environmental documentation to comply with CEQA.
CALTRANS shall review, comment, and concur (if applicable) with the environmental
document.
B).CITY shall obtain all necessary permits, agreements, or approvals from the applicable
regulatory agencies for implementation of the Bioretention Unit as described in Section 1
of this Exhibit.
C) CITY shall not construct the Bioretention Unit within any jurisdictional waters or
wetlands.
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District Agreement No. 4 -2557
Section 3. Bioretention Unit Project Design Development
A) CITY shall prepare the Plans, Specifications and Estimates (PS &E) in accordance with
guidelines, design standards, and requirements approved by the CITY, for the installation
of the Bioretention Unit as outlined in Section 1 above. The PS &E completion shall be
within one year starting the effective date of this Agreement.
B) A copy of the PS &E for the Bioretention Unit shall be submitted to CALTRANS for
CALTRANS' review, comment, concurrence and /or approval at appropriate stages of
development.
C) Sizing calculations for the Bioretention Unit that demonstrate proper flow or volume (or
combination of flow and volume) that demonstrates the off -site stormwater treatment
system treats an equivalent of 7.19 acres of highway impervious surface shall be
submitted to CALTRANS for CALTRANS' review, comment, approval and /or WRCB
approval at appropriate stages of development.
Section 4. Construction Administration
A) CITY shall advertise, award, and administrate the construction contract for the
Bioretention Unit project according to the PS &E.
B) CITY shall notify CALTRANS in writing five (5) calendar days prior to the construction
start date of the Bioretention Unit project.
C) CITY shall notify CALTRANS in writing and obtain CALTRANS' approval prior to
making any changes to the approved PS &E.
D) CITY shall, within 180 calendar days following the contract completion and acceptance
of the construction, furnish CALTRANS with a complete set of "As- Built" plans for the
Bioretention Unit. The submittal must also include all CALTRANS requested contract
records, including survey documents and Records of Surveys (to include monument
perpetuation per the Land Surveyor Act, section 8771). CITY shall submit a complete set
of acceptable full -sized reproducible "As- built" plans on a CD -ROM in MicroStation or
AutoCAD format.
Section 5. Maintenance and Reporting Requirements
A) Following completion of the Bioretention Unit construction, the Bioretention Unit shall
be incorporated into CITY's inventory of stormwater treatment facilities and shall be
maintained by the CITY thereafter.
B) CITY shall ensure the Bioretention Unit is properly maintained following Alameda
County C.3 Stormwater Technical Guidance to enable their full pollutant removal
functionality, including but not limited to, effective removal of trash, suspended solids
and petroleum -based pollutants, for no less than 20 years.
C) CITY shall submit written bank verification to CALTRANS that CITY has deposited
$40,000.00 into an interest bearing account for the maintenance of the Bioretention Unit
installed within the CITY for a 20 year life of service.
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District Agreement No. 4 -2557
D) CITY shall submit a report in electronic format detailing the installation of the
Bioretention Unit within ten (10) days following completion of all construction work,
including but not limited to the following information:
1. Date of construction completion
2. Total cost of the project
3. Name, address, and telephone number of the maintenance entity that will be
maintaining the Bioretention Unit
4. Any changes that occurred during construction (if any)
E). CITY shall submit an annual maintenance report in electronic format on the Bioretention
Unit to CALTRANS by October 1St each year for twenty (20) years including, but not
limited to the following information:
1. Date of maintenance
2. List of maintenance activities performed
3. General operation and condition of Bioretention Unit
4. Any recommendations based on the maintenance review
It is acceptable for the CITY to provide an excerpt of their annual National Pollutant
Discharge Elimination System (NPDES) report to the San Francisco Bay Regional Water
Quality Control Board which also documents maintenance activities of water - treatment
measures in the CITY system. The excerpt must address the items listed above in the
annual maintenance reporting.
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District Agreement No. 4 -2557
EXHIBIT B
COST BREAKDOWN (AUGUST 17, 2015)
City of Petaluma — Old Corona Road /Industrial Ave Storm Water Treatment
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Item
Unit Cost
Cost
Comments
Design
Consultant
Design - Bio-
Retention Unit
$187,000
25% of
construction
cost
Environmental
Clearance
Document
$40,000
Subtotal Design
$227,000
Construction
Bio- Retention
Unit near
intersection of
Old Corona
Road and
Industrial Ave.
Pipe Installation,
Drainage
Structures, Bio -
Retention Unit,
Planting
$745,000
Construction
Contingencies
15% of
construction
costs
$112,000
Subtotal
Construction
$857,000
Support Cost
Project
Administration
$ 15,000
Design Support
Cost
$15,000
Construction
Support Cost
$40,000
Subtotal
Support Cost
$70,000
Maintenance
Annual
maintenance
20 years
$225,000
Annual
maintenance
cost of
$11,250/ unit
Total
$1,379,000
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District Agreement No. 4 -2557
EXHIBIT C
PROPOSED OFF -SITE STORMWATER TREATMENT LOCATION MAP
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