HomeMy WebLinkAboutComments PWE 1/12/2009
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Memorandum
City of Springfield
Subject:
January 12,2009
Steve Hopkins, Urban Planner
Richard Perry, Engineer in Training
DRC2008-00076, Bring Recycling
Date:
To:
From:
1 have reviewed the materials provided with the subject application. The recommended
findings and conditions outlined below are provided for your use in preparing the
land-use decision.
SANITARY SEWER
Finding: Section 4.3-105.E of the SDC requires that proposed developments in
unincorporated urbanizable land shall have the approval of the Lane County Sanitarian
for all septic system designs.
Finding: The applicant has proposed a new septic drain field, including a new sanitary
pressure line with pump and included a faxed copy of the Lane County Septic permit.
Finding: Pursuant to Chapter 3.03.4.A of the City's Engineering Design Standards and
Procedures Manual and Section 4.4 of Portland's Stormwater Management Manual, solid
waste storage areas shall be covered and hydraulically isolated from potential stormwater
runoff, and directed to the sanitary sewer system.
Condition: The applicant shall hydraulically isolate the solid waste storage area from the
proposed floor drain and have a spill control and maintenance plan in place for any
liquids that may leach out of the containers to prevent them from entering the storm drain
system. The plan should also address regular sweeping of solids to prevent them from
entering the storm drain system.
STORMW A TER MANAGEMENT
Finding: Section 4.3-IIO.B of the SDC requires that the Approval Authority shall grant
development approval only where adequate public and/or private stormwater
management systems provisions have been made as determined by the Public Works
Director, consistent with the Engineering Design Standards and Procedures Manual
(EDSPM).
Finding: Section 4.3-11 O.C of the SDC states that a stormwater management system shall
accommodate potential run-off from its entire upstream drainage area, whether inside or
outside ofthe development.
Finding: Section 4.3-11 O.D of the SDC requires that run-off from a development shall be
directed to an approved stormwater management system with sufficient capacity to .
Date Received:
Planner: SH
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accept the discharge.
Finding: Section 4.3-IIO.E of the SDC requires new developments to employ drainage
management practices, which minimize the amount and rate of surface water run-off into
receiving streams, and which promote water quality.
Finding: To comply with Sections 4.3-110.0 & E, stormwater runoff from the site will
be directed into a series of both physical and vegetative filtration via double filtered catch
basins, a vegetated swale and an infiltration pond prior to discharge into the public
system. The public system is a drainage ditch located at the southern edge of the
property near the railroad line.
Finding: The existing public stormwater system, to which the applicant proposes
connection, has limited capacity. The applicant has turned in hydrologic stormwater
calculations, consistent with the City's EDSPM, showing that the proposed detention
pond will limit the peak stormwater discharge rates to the pre-developed 2-year storm
event for both the 2 and 25-year post-developed storm event, thereby limiting the flow
into the existing system.
WATER QUALITY
Finding: Under Federal regulation of the Clean Water Act (CW A), Endangered Species
Act (ESA), and National Pollutant Discharge Elimination System (NPDES), the City of
Springfield has obtained a Municipal Separate Storm Sewer System (MS4) permit. A
provision of this permit requires the City demonstrate efforts to reduce the pollution in
urban st6rmwater to the Maximum Extent Practicable (MEP).
Finding: Federal and Oregon Department of Environmental Quality (ODEQ) rules
require the City's MS4 plan address six "Minimum Control Measures." Minimum
Control Measure 5, "Post-Construction Stormwater Management for New Development
and Redevelopment," applies to the proposed development.
Finding: Minimum Control Measure 5 requires the City of Springfield to develop,
implement and enforce a program to ensure the reduction of pollutants in stormwater
runoff to the MEP. The City must also develop and implement strategies that include a
combination of structural or non-structural Best Management Practices (BMPs)
appropriated for the community.
Finding: Minimum Control Measure 5 requires the City of Springfield use an ordinance
or other regulatory mechanism to address post construction runoff from new and re-
development projects to the extent allowable under State law. Regulatory mechanisms
used by the City include the Springfield Development Code (SDC), the City's
Engineering Design Standards and Procedures Manual (EDSPM) and the future
Stormwater Facilities Master Plan (SFMP).
Finding: As required in Section 4.3-11 O.E of the SDC, "a development shall be required
to employ drainage management practices approved by the Public Works Director and
Date Received:
Planner: SH
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consistent with Metro Plan policies and the Engineering Design Standards and
Procedures Manual."
Finding: Section 3.02 of the City's EDSPM states the Public Works Department will
accept, as interim design standards for stormwater quality, water quality facilities
designed pursuant to the policies and procedures of either the City of Portland (BES), or
the Clean Water Services (CWS).
Finding: Section 3.03.3.B of the City's EDSPM states all public and private development
and redevelopment projects shall employ a system of one or more post-developed BMPs
that in combination are designed to achieve at least a 70 percent reduction in the total
suspended solids in the runoff generated by that development. Section 3.03.4.E ofthe
manual requires a minimum of 50 percent of the non-building rooftop impervious area on
a site shall be treated for stormwater quality improvement using vegetative methods.
Finding: The applicant's proposal will require the Oregon DEQ to issue a 1700B permit
allowing for drainage and treatment of water from a vehicle wash down station. The
permit restricts the applicant to bio-degradable, phosphate free cleaners and cold water in
addition to other restrictions.
Finding: The applicant proposes to install a double filter catch basin in building four as
well as within the paved areas of the development. .
Finding: The applicant proposes to install an Oil/Water separator at the downstream
drainage pipe from building four.
Finding: To meet the requirements of the City's MS4 permit, the Springfield
Development Code, and the City's EDSPM, the applicant has proposed one private
vegetative water quality swale and one infiltration pond. Proper seed mixes have been
proposed for both systems, but the actual application rates have not been specified.
Finding: The vegetation proposed for use in the swales will serve as the primary pollutant
removal mechanism for the stormwater runoff, and will remove suspended solids and
pollutants through the processes of sedimentation and filtration. Satisfactory pollutant
removal will occur only when the vegetation has been fully established.
Condition: Prior to approval of the final site plan the applicant shall submit a copy of an
approved 1700B permit from the Oregon DEQ and comply with the requirements of that
permit at all times.
Condition: Prior to approval of the final site plan the applicant shall install a cut -off
valve at the out let of the Oil/Water separator to act as containment in the event of a spill,
or contamination of the system, to prevent such contaminants from entering the water
quality treatment area. The use of this valve should be incorporated into the spill
prevention plan.
Date Received:
Planner: SH
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Condition: Prior to approval of the fmal site plan, the applicant shall provide an
operations and maintenance plan to the City for review to ensure the long-term
maintenance and operation of the proposed Double Filter Catch Basin, as well as the Oil
Water Separator. The plan should designate maintenance responsibility for operating and
maintaining the system, and should be distributed to all property owners and tenants of
the site.
Condition: Prior to Final Site Plan approval, the applicant shall submit proposed seed
application rates for the vegetative water quality swale, the infiltration pond and the septic
drain field. The seed mix application rates shall meet the requirements of the City's interim
design standards as required in Section 3.02 of the EDSPM. The application rates must
meet the minimum rates as required by manufacturer of the seed mix.
Condition: To ensure a fully functioning water quality system and meet objectives of
Springfield's MS4 permit, the Springfield Development Code and the EDSPM, the
proposed private vegetative water quality swale shall be shall be fully vegetated with all
vegetation species established prior to approval of Final Site Plan. Alternatively, if this
condition cannot be met, the applicant shall provide and maintain additional interim
erosion control/water quality measures acceptable to the Public Works Department that
will suffice until such time as the swale vegetation becomes fully established.
OTHER
NOTE: The intent of this list is to give a developer insight about requirements related to
public improvements before they develop their property.
FEES AND PERMITS
SYSTEMS DEVELOPMENT CHARGE:
Pay applicable Systems Development Charges when building permits are issued for
developments within the City limits or within the Springfield Urban Growth Boundary.
(The cost relates to the amount of increase in impervious surface area, transportation trip
rates, and plumbing fixture units. Some exceptions apply to Springfield Urban Growth
areas.) [Springfield Code Chapter II, Article 11 ]
Systems Development Charges (SDC's) will apply to the construction of buildings and
site improvements within the subject site. The Charges will be based upon the rates in
effect at the time of permit submittal for buildings or site improvements on each portion
or phase of the development.
SANITARY SEWER IN-LIEU-OF -ASSESSMENT CHARGE:
Pay a Sanitary Sewer In-Lieu-of-Assessment charge in addition to the regular connection
fees if the property or portions ofthe property being developed have not previously been
assessed or otherwise participated in the cost of a public sanitary sewer. Contact the
Engineering Division to determine ifIn-Lieu-of-Assessment charge is applicable. [Ord .
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. 'ianner: SH
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5584]
PUBLIC INFRASTRUCTURE FEES:
It is the responsibility of the private developer to fund the public infrastructure.
OTHER CITY PERMITS:
Encroachment Permit or Sewer Hookup Permit (working within right-of-way or public
easements) example: new tap to the public storm or sanitary sewer, or adjusting a
manhole. [The current rate is $135 for processing plus applicable fees and deposits]
Land & Drainage Alteration Permits (LDAP). [Contact the Springfield Public Works
Department@ 726-5849 for appropriate applications/requirements]
ADDITIONAL PERMITS/APPROVALS MAYBE NECESSARY:
. Metropolitan Wastewater Management Commission (Pump station, sanitary
sewers 24 inches or larger)
. Lane County Facilities Permit (Ifthe project is within Lane County jurisdiction)
. Railroad (If the project crosses a railroad)
. Oregon Department of Transportation (If the project is within ODOT jurisdiction)
. Division of State Lands (Storm water discharge, wetlands)
. Oregon Department of Environmental Quality (Erosion control (5 acres or
greater), pump station, storm water discharge; wetlands)
. U.S. Army Corps of Engineers (Storm water discharge, wetlands)
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SUMMARY CONDITIONS
Condition: The applicant shall hydraulically isolate the solid waste storage area from the proposed floor
drain and have a spill control and maintenance plan in place for any liquids that may leach out ofthe
containers to prevent them from entering the storm drain system. The plan should also address regular
sweeping of solids to prevent them from entering the storm drain system.
Condition: Prior to approval of the final site plan the applicant shall submit a copy of an approved 1700B
permit from the Oregon DEQ and comply with the requirements of that permit at all times.
Condition: Prior to approval of the final site plan the applicant shall install a cut-off valve at the out let of
the Oil/Water separator to act as containment in the event of a spill, or contamination of the system, to
prevent such contaminants from entering the water quality treatment area. The use of this valve should
be incorporated into the spill prevention plan.
Condition: Prior to approval of the final site plan, the applicant shall provide an operations and
maintenance plan to the City for review to ensure the long-term maintenance and operation of the
proposed Double Filter Catch Basin, as well as the Oil Water Separator. The plan should designate
maintenance responsibility for operating and maintaining the system, and should be distributed to all
property owners and tenants of the site.
Condition: Prior to Final Site Plan approval, the applicant shall submit proposed seed application rates for
the vegetative water quality swale, the infiltration pond and the septic drain field. The seed mix
application rates shall meet the requirements of the City's interim design standards as required in Section
3.02 of the EDSPM. The application rates must meet the minimum rates as required by manufacturer of
the seed mix.
Condition: To ensure a fully functioning water quality system and meet objectives of Springfield's MS4
permit, the Springfield Development Code and the EDSPM, the proposed private vegetative water
quality swale shall be shall be fully vegetated with all vegetation species established prior to approval of
Final Site Plan. Alternatively, if this condition cannot be met, the applicant shall provide and maintain
additional interim erosion control/water quality measures acceptable to the Public Works Department
that will suffice until such time as the swale vegetation becomes fully established.
Date Received: )- 11
Planner: SH