HomeMy WebLinkAboutApplication APPLICANT 9/29/2022 (2)Operations and Maintenance Plan
Willamette Valley Temple
Prepared for: The Corporation of the Presiding Bishop of the Church of Jesus Christ of Latter -Day Saints
Prepared by: Melanie Greenfield, PE
Project Engineer: Matt Keenan, PE
September 2022 1 KPFF Project #2100170
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Table of Contents
Appendices
Appendix A
Recorded Notice of Operations and Maintenance
Appendix B
Signed Operations and Maintenance Agreement
Appendix C
Facility Operations and Maintenance Plan: Rain Garden
Appendix D
Facility Operations and Maintenance Plan: Imbrium Stormceptor Manhole
Appendix E
Stormwater Management Facility Inspection and Maintenance Log
Appendix F
Stormwater Drainage Plans
Willamette Valley Temple I gPFFCPnsuhing Engineers
OPERATKINS AND MAINTENANCE MANUAL
Responsibility
The facility is to be maintained by the property owner. Seethe recorded 0&M form for contact information.
The preparer has designed a system that can be easily maintained by maintenance staff.
A copy of this Operations and Maintenance (0&M) Plan shall be provided to all property owners and property
managers.
Description
Site Description
The approximately 10.3 -acre site located at 300 International Way near the corner of Industrial Way and
Corporate Way in Springfield, OR. The proposed improvements center around the construction of a new
23,484 SF Temple building. Surrounding the Temple, site improvements will include new parking stalls and
drive aisles, pedestrian sidewalks, landscaped areas, covered bike parking and two standalone buildings to
the north of the site. The existing site consists of an unimproved open field covered in dry grasses and sparse
bushes and trees.
Runoff from the Temple's roof and pollution generating areas in the northeast corner of the site is collected
and directed to a rain garden east of the site's developed area. From there, the stormwater will do the
following: (1) pass through the growing media into a rock storage layer and (2) infiltrate into the ground. In
storm events larger than the 30 -year storm, runoff from the rain garden will overflow to an existing 12 -inch
stormwater pipe that discharges into the existing reginal detention facility to the north of the project site.
Runoff from the site's remaining pollution generating areas is collected via a combination of catch basins,
trench drains and area drains. It is then conveyed to one of the site's three Contech Stormceptor Manholes
for water quality treatment. This structure acts as a hydrodynamic separator and treats stormwater runoff
by allowing pollutants, suspended solids and oils to separate or settle out of the stormwater runoff
Definitions
• Rain Garden: an open basin that traps pollutants by filtering and slowing flows, allowing particles to
settle out. Additional treatment occurs when runoff filters through the growing media.
• Growing Media: Specialty soil containing little to no fines designed to filter stormwater reliably
without clogging. If the planter soil needs to be replaced, it must be replaced with soil that matches
the building's plans and specifications.
• Contech Stormceptor Manhole: a proprietary treatment system that removes pollutants from
stormwater runoff via hydrodynamic separation.
Inspection/Maintenance Schedule
The whole system shall be inspected and maintained quarterly and within 48 hours after each major storm
event. For this Operations & Maintenance Plan, a major storm event is defined as greater than 2 -inches of
rain in 24 hours. All components of the storm system as described below must be inspected and maintained
frequently or they will cease to function effectively. The facility owner must keep a log, recording all
inspection dates, observations and maintenance activities. Receipts shall be saved when maintenance is
performed and there is a record of expense.
Willamette Valley Temple I gPFFC,msuhing Engineers
OPERATKINS AND MAINTENANCE MANUAL
Inspection/Maintenance Procedure
The following items shall be inspected and maintained as stated:
Rain Garden
• See appendix for City of Springfield recommended maintenance procedures.
Imbrium Stormceptor Manhole
• See appendix for Imbrium recommended maintenance procedures.
Inlets and Drains
• Shall be inspected for obstructions, debris, oil and grease, which shall be removed upon discovery.
• If water ponds over the overflow inlet for more than 2 hours after a major storm, the inlet drain may be
clogged.
• Check for debris/sediment accumulation in and around the inlet or overflow. Rake, remove and evaluate
upland causes (erosion, surface debris, etc.)
Piped Storm System
• Annual inspection for clogging shall be performed.
• System shall be inspected for cracks or leaks during each inspection.
• Cleaning shall be done without use of detergent or surfactants. A pressure washer may be used if
necessary.
Access
• Egress and ingress routes shall be open and maintained to design plans.
Willamette Valley Temple I gPFFCPnsuhing Engineers
OPEMTKINS AND MAINTENANCE MANUAL
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OPERATKINS AND MAINTENANCE MANUAL
Appendix A
Recorded Notice of Operations and Maintenance
Willamette Valley Temple I gPFFCPnsuhing Engineers
OPERATKINS AND MAINTENANCE MANUAL
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OPERATKINS AND MAINTENANCE MANUAL
Notice of Operations and Maintenance Agreement
Private Stormwater Management and Treatment System
The undersigned owner(s), is hereby given notice that stormwater runoff from the `Property" described below
requires stormwater management facilities to be located, designed, and constructed in compliance with the City
of Springfield's Engineering Design and Procedures Manual. Said facilities shall be operated and maintained
in accordance with the Operations and Maintenance Agreement (O&M Agreement) on file with the City of
Springfield, Development and Public Works Department.
The Chinch of J Christ of Lear -day Saires a Utah corporation sole (Property Owner/Developer)
acknowledges and agrees to maintain private sturawater treatment facilities listed in this document. The
maintenance of the stormwater facilities listed in this document is required as part of the Development
Agreement with the City of Springfield. This facility will be operated and maintained in accordance with the
requirements stated in this document and in the latest edition of the City of Springfield Engineering Design
Standards and Procedures Manual, Chapter 3. The City reserves the right to enter and inspect any stormwater
facility located on the `Property" to ensure the facilities are operating as designed. Failure of the responsible
party to inspect and maintain the facilities can result in an adverse impact to the public stormwater system and
the quality of receiving waters.
The requirement to operate and maintain the stormwater treatment facilities in accordance with the approved
site development agreement and the site O&M Agreement is binding on all current and future owners of the
property. The Agreement and its O&M Plan may be modified under written consent of new owners with
written approval by and re -filing with the City. The O&M Agreement and O&M Plan for facilities constructed
pursuant to this notice are available at the Development and Public Works Department, 225 Fifth St, Springfield
Oregon, or call (541)-736-3753, between the hours of 8 a.m. and 5 p. m., Monday through Friday.
The Subject premises, is legally described as follows: (Tw lotnumber cannot be used to describe the property. Legal
descriptions may be obtained from the county assessor's office).
SEE EXHIBIT "A"
ATTACHED HERETO AND INCORPORATED HEREIN BY REFERENCE
By signing below, the signer accepts and agrees to the terms and conditions contained in the Operations and
Maintenance Plan and in any documents attached. This instrument is intended to be binding upon the parties
hereto, their heirs, successors, and assigns.
In Witness whereof, the undersigned has executed this instrument on this TO day of Spp(�n.6¢,[? ,
20 ZZ—
Owner(s):
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Owner(s):
Signature el, -4
AUTHOflIZEDAGEfdT
Print Name c- Fol i) Dn.t,- Tt
Ui*A Soklak�
STATE OF A�, County of lane,
fl This instrument as acknowledged before me on
by , owner(s) of the above
described premises.
This instrument as acknowledged before me on $ 010, A P02 Z
by Co 1>. banrolc
as Au%1ur2ck5
of owner(s) of the above described
premises.
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Notary Pu for9rcgex Llta k My Commission Expires
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RETURN TO: CITY OF SPRINGFIELD
DEVELOPMENT& PUBLIC WORKS DEPT.
226 FIFTH ST.
SPRINGFIELD, OREGON 97477
RESERVE THIS SPACE
FOR RECORDING STICKER
**Avoid $20 nonstandard doe FEE (font too small)...
Print this form on Legal size paper.'*
Appendix 3A-1 Rt,01127M Page 1 of 1 EDSP Adopted December 03, 2012
Appendix B
Signed Operations and Maintenance Agreement
Willamette Valley Temple I gPFFCPnsuhing Engineers
OPERATKINS AND MAINTENANCE MANUAL
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OPERATKINS AND MAINTENANCE MANUAL
Operations and Maintenance Agreement
Private Stormwater Management and Treatment System
Land Development Application Number: 811-22-000159 TYP2
Owner's Name: Corey Daniels The Church of Jesus Christ of Latter-day Saints
Phone No.: 801-240-0086
Mailing AddTe55: 50 East North Temple Street, 10th Floor
Salt Lake
Site
State UT
City Springfield State OR Zip 97477
Site Map and Tax lot No.: Map 17-03-15-40, Tax Lots 3200, 3300, 3400 & 3500
(Or attach document oah addea,na/ lot information ifd�e f dIiry o'osses more than one lo)
Type of Facility(ies) Fain Garden Stormceptor MH Inlets and Drains Piped Storm System
Requirements
1) Stormwater Management Site Plan, (min. 8 1/2" x 11" attached to this form) showing the location of
the facihtyfes) in relation to building structures or other permanent monuments on the site, sources of
runoff entering the facility(ies), and where stonnwater will be discharged to after leaving the
facility(ies). Landscape mid vegetation should be clear on the Plan submitted or submit a separate
Landscape Plan document showing vegetation type, location, and quantity (landscape plan). These
can be the same Plans submitted for development review.
The stormwater management facility(ies) shown on the Site Plan are a required condition of
development approval for the identified property. The owner of the identified property is required to
operate and maintain the facilky(ies) in accordance with the Facility Speck Operation and
Maintenance Plans) (O&M Plan(s)) attached to this form and on file with the City. The O&M Plan
for the facility(ies) will be available at the Development and Public Warks Department, 225 5" Street,
Springfield, Oregon between the hours of 8 a.m. and 5 p.m., Monday through Friday.
2) Financially responsible party (circle one):
Property Owner Homeowner Association Other (describe)
3) Partyfes) responsible for maintenance (only if other than owner).
Daytime phone no. sot 240 - 1000 'Church Headquarters)
Emergency/after-hours contact phone no. sol 240 - 1000
Maintenance Contact Party(ies) Name & Business Address:
Once building is completed and opened then an m site facility manager will be responsible for this maintenance agreement.
4) Maintenance practices and schedule for the Stormwater facility(ies) we included in the Facility
Specific O&M Plans) attached to this form and filed with the Development and Public Works
Department, City of Springfield. The operation and maintenance practices are based on the version of
the City of Eugene's Stormwater Management Manual in effect at the date of development
application, as modified by any plans attached to this document at the time of signing.
Application Date:
By signing below, Filer accepts and agrees to the terms and conditions contained in the Operations and
Maintenance Plants) and in any document executed by Filer and recorded with it.
Filer Signature:
Print Name:
Appendix 3A-2 Re, 01n6116 Page 1 of 1 EDSP Adopted December 03, 2012
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OPERATKINS AND MAINTENANCE MANUAL
Appendix C
Facility Operations and Maintenance Plan: Rain Garden
Willamette Valley Temple I gPFFCPnsuhing Engineers
OPERATKINS AND MAINTENANCE MANUAL
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OPERATKINS AND MAINTENANCE MANUAL
Rain Gardens
Operations and Maintenance Plan
A vegetated Infiltration Basin or rain garden is a vegetated depression created by excavation, berms,
or small dams to provide for short-term ponding of surface water until it percolates into the soil. The
basin shall infiltrate stormovater within 24 hours. All facility components and vegetation shall be
inspected for proper operations and stmchual stability, at a minimum, quarterly for the first 2 years from
the date of installation, 2 times per year thereafter, and within 49 hours after each maj or storm event. The
facility owner must keep a log, recording all inspection dates, observations, and maintenance activities.
The following items shall be inspected and maintained as stated:
Basin Inlet shall assure umestiicted stormwater flow to the vegetated basin.
• Sources of erosion shall be identified and controlled when native soil is exposed or erosion channels
are present.
• Inlet shall be cleared when conveyance capacity is plugged.
• Rocks lash pads shall be replenished to prevent erosion.
Embankment, Dikes, Berms and Side Slopes retain water in the infiltration basin.
• Structural deficiencies shall be corrected upon discovery:
o Slopes shall be stabilized using appropriate erosion control measures when soil is exposed/ flow
charnels are forming.
o Sources of erosion damage shall be identified and controlled.
Overflow or Emergency Spillway conveys flow exceeding reservoir capacity to an approved stormwater
receiving system.
• Overflow shall be cleared when 25% of the conveyance capacity is plugged.
• Sources of erosion damage shall be identified and controlled when soil is exposed.
• Rocks or other armament shall be replaced when only one layer of rock exists.
Filter Media shall allow stormwater to percolate uniformly through the infiltration basin. If water
remains 36-49 hours after storm, sources of possible clogging shall be identified and corrected.
• Basin shall be raked and, if necessary, soil shall be excavated, and cleaned or replaced.
• Infiltration area shall be protected from compaction during constmction.
Sediment/ Basin Debris Management shall prevent loss of infiltration basin volume caused by
sedimentation. Gauges located at the opposite ends of the basin shall be maintained to monitor
sedimentation.
• Sediment and debris exceeding 3 inch in depth shall be removed every 2-5 years or sooner if
performance is affected.
Debris and Litter shall be removed to ensure stormovater infiltration and to prevent clogging of overflow
drains and interference with plant growth.
• Restricted sources of sediment and debris, such as discarded lawn clippings, shall be identified and
prevented.
Vegetation shall be healthy and dense enough to provide filtering while protecting underlying soils from
erosion.
• Mulch shall be replenished as needed to ensure healthy plant growth
• Vegetation, large shrubs or trees that limit access or interfere with basin operation shall be pruned or
removed.
• Grass shall be mowed to 4"-9" high and grass clippings shall be removed no less than 2 times per
year.
• Fallen leaves and debris from deciduous plant foliage shall be raked and removed if build up is
damaging vegetation.
• Nuisance or prohibited vegetation (such as blackberries or English Ivy) shall be removed when
discovered. Invasive vegetation contributing up to 25% of vegetation of all species shall be removed.
• Dead vegetation shall be removed to maintain less than 10% of area coverage or when infiltration
Appendix 3A-4 Page 15 of 31 EDSP Adopted December 03, 2012
basin function is impaired. Vegetation shall be replaced within 3 months, or immediately if required
to control erosion.
Spill Prevention measures shall be exercised when handling substances that contaminate stormwater.
Releases of pollutants shall be corrected as soon as identified.
Training and/or written guidance information for operating and maintaining vegetated infiltration
basins shall be provided to all property owners and tenants. A copy of the O&M Plan shall be provided to
all property owners and tenants.
Access to the infiltration basin shall be safe and efficient. Egress and ingress routes shall be maintained
to design standards. Roadways shall be maintained to accommodate size and weight of vehicles, if
applicable.
• Obstacles preventing maintenance personnel and/or equipment access to the infiltration basin shall be
removed.
• Gravel or ground cover shall be added if erosion occurs, e.g., due to vehicular or pedestrian traffic.
Insects and Rodents shall not be harbored in the infiltration basin. Pest control measures shall be taken
when insects/roderts are found to be present.
• If a complaint is received or an inspection reveals that a stormwater facility is significantly infested
with mosquitoes or other vectors, the property owner/owners or their designee may be required to
eliminate the infestation at the City inspector's discretion. Control of the infestation shall be
attempted by using first non -chemical methods and secondly, only those chemical methods
specifically approved by the City's inspector. Acceptable methods include but are not limited to the
following:
i. Installation of predacious bird or bat nesting boxes.
ii. Alterations of pond water levels approximately every four days in order to disrupt mosquito larval
development cycles.
iii. Stocking ponds and other permanent water facilities with fish or other predatory species.
iv. If non -chemical methods have proved unsuccessful, contact the City inspector prior to use of
chemical methods such as the mosquito larvicides Bacillus thurengensis var. israchensis or other
approved larvicides. These materials may only be used with City inspector approval if evidence
can be provided that these materials will not migrate off-site or enter the public stormwater
system. Chemical larvicides shall be applied by a licensed individual or contractor.
• Holes in the ground located in and around the infiltration basin shall be filled.
If used at this site, the following will be applicable:
Fences shall be maintained to preserve their functionality and appearance.
• Collapsed fences shall be restored to an upright position.
• Jagged edges and damaged fences shall be repaired or replaced.
Appendix 3A-4 Page 16 of 31 EDSP Adopted December 03, 2012
Appendix D
Facility Operations and Maintenance Plan: Imbrium Stormceptor Manhole
Willamette Valley Temple I gPFFCPnsuhing Engineers
OPERATKINS AND MAINTENANCE MANUAL
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OPERATKINS AND MAINTENANCE MANUAL
Stormceptor®
Owner's Manual
0
Table 2B. (CA & Int'I) Storage Capacities
STC Model
Hydrocarbon
Storage Capacity
L
Sediment
Capacity
L
EOS Model
Hydrocarbon
Storage Capacity
L
OSR Model
Hydrocarbon
Storage Capacity
L
Sediment
Capacity
L
300
300
1450
300
662
300
300
1500
750
915
3000
750
1380
750
900
3000
1000
915
3800
1000
2235
1500
915
6205
2000
2890
7700
2000
5515
2000
2790
7700
3000
1 2890
11965
1 3000
6710
4000
3360
16490
4000
7585
4000
4700
22200
5000
3360
20940
5000
9515
6000
3930
26945
6000
12940
6000
5200
26900
9000`
10555
32980
9000`
19010
9000`
9300
33000
11000•
10555
37415
10000•
22865
14000`
11700
53890
14000•
29715
14000`
10500
53900
Notes.
1. Hydrocarbon & Sedimert capacities can be modified to accommodate specific site design requirements, contact your local
mpresertatim forassistarice.
'Consist oftwo chamber structures in series.
4—Stormceptor Inspection & Maintenance
Regular inspection and maintenance is a proven, cost-effective way to maximize water resource
protection for all stormwater pollution control practices, and is required to insure proper functioning
of the Stormceptor. Both inspection and maintenance of the Stormceptor is easily performed from
the surface. Stormceptor's patented technology has no moving parts, simplifying the inspection
and maintenance process.
Please refer to the following information and guidelines before conducting inspection and
maintenance activities.
When is inspection needed?
• Post -construction inspection is required prior to putting the Stormceptor into service.
• Routine inspections are recommended during the first year of operation to accurately assess
the sediment accumulation.
• Inspection frequency in subsequent years is based on the maintenance plan developed in
the first year.
• Inspections should also be performed immediately after oil, fuel, or other chemical spills.
When is maintenance cleaning needed?
• For optimum performance, the unit should be cleaned out once the sediment depth reaches
the recommended maintenance sediment depth, which is approximately 15% of the unit's
total storage capacity (see Table 2). The frequency should be adjusted based on historical
inspection results due to variable site pollutant loading.
Stormceptor® Owner's Manual 9
Sediment removal is easier when removed on a regular basis at or prior to the recommended
maintenance sediment depths, as sediment build-up can compact making removal more
difficult.
The unit should be cleaned out immediately after an oil, fuel or chemical spill.
What conditions can compromise Stormceptor performance?
• If construction sediment and debris is not removed prior to activating the Stormceptor unit,
maintenance frequency may be reduced.
• If the system is not maintained regularly and fills with sediment and debris beyond the
capacity as indicated in Table 2, pollutant removal efficiency may be reduced.
• If an oil spill(s) exceeds the oil capacity of the system, subsequent spills may not be
captured.
• If debris clogs the inlet of the system, removal efficiency of sediment and hydrocarbons may
be reduced.
• If a downstream blockage occurs, a backwater condition may occur for the Stormceptor and
removal efficiency of sediment and hydrocarbons may be reduced.
What training is required?
The Stormceptor is to be inspected and maintained by professional vacuum cleaning service
providers with experience in the maintenance of underground tanks, sewers and catch basins.
For typical inspection and maintenance activities, no specific supplemental training is required
for the Stormceptor. Information provided within this Manual (provided to the site owner) contains
sufficient guidance to maintain the system properly.
In unusual circumstances, such as if a damaged component needs replacement or some other
condition requires manned entry into the vessel, confined space entry procedures must be
followed. Only professional maintenance service providers trained in these procedures should
enter the vessel. Service provider companies typically have personnel who are trained and
certified in confined space entry procedures according to local, state, and federal standards.
What equipment is typically required for inspection?
• Manhole access cover lifting tool
• Oil dipstick / Sediment probe with ball valve (typically'/. -inch to 1 -inch diameter)
• Flashlight
• Camera
Data log / Inspection Report
Safety cones and caution tape
Hard hat, safety shoes, safety glasses, and chemical -resistant gloves
10 Stormceptor® Owner's Manual
Recommended Stormceptor Inspection Procedure:
Stormceptor is to be inspected from grade through a standard surface manhole access
cover.
Sediment and oil depth inspections are performed with a sediment probe and oil dipstick.
Oil depth is measured through the oil inspection port, either a 4 -inch (100 mm) or 6 -inch (150
mm) diameter port.
Sediment depth can be measured through the oil inspection port or the 24 -inch (610 mm)
diameter outlet riser pipe.
Inspections also involve a visual inspection of the internal components of the system.
What equipment is typically required for maintenance?
• Vacuum truck equipped with water hose and jet nozzle
• Small pump and tubing for oil removal
• Manhole access cover lifting tool
• Oil dipstick/ Sediment probe with ball valve (typically'/. -inch to 1 -inch diameter)
• Flashlight
• Camera
Data log / Inspection Report
Safety cones
Hard hats, safety shoes, safety glasses, chemical -resistant gloves, and hearing protection for
service providers
Gas analyzer, respiratory gear, and safety harness for specially trained personnel if confined
space entry is required
Stormceptor® OHnefs Manual I
Recommended Stormceptor Maintenance Procedure
Maintenance of Stormceptor is performed using a vacuum truck.
No entry into the unit is required for maintenance. DO NOT ENTER THE STORMCEPTOR
CHAMBER unless you have the proper personal safety equipment, have been trained and
are qualified to enter a confined space, as identified by local Occupational Safety and Health
Regulations (e.g. 29 CFR 1910.146 or Canada Occupational Safety and Health Regulations —
SOR/86-304). Wthout the proper equipment, training and permit, entry into confined spaces
can result in serious bodily harm and potentially death. Consult local, provincial, and/or state
regulations to determine the requirements for confined space entry. Be aware, and take precaution
that the Stormceptor fiberglass insert may be slippery. In addition, be aware that some units do not
have a safety grate to cover the outlet riser pipe that leads to the submerged, lower chamber.
Ideally maintenance should be conducted during dry weather conditions when no flow is
entering the unit.
Stormceptor is to be maintained through a standard surface manhole access cover.
Insert the oil dipstick into the oil inspection port. If oil is present, pump off the oil layer into
separate containment using a small pump and tubing.
Maintenance cleaning of accumulated sediment is performed with a vacuum truck.
• For 6 -ft (1800 mm) diameter models and larger, the vacuum hose is inserted into the
lower chamber via the 24 -inch (610 mm) outlet riser pipe.
• For 4 -ft (1200 mm) diameter model, the removable drop tee is lifted out, and the
vacuum hose is inserted into the lower chamber via the 12 -inch (305 mm) drop tee
hole.
12 Slormceptor® Owner's Manual
Using the vacuum hose, decant the water from the lower chamber into a separate
containment tank or to the sanitary sewer, if permitted by the local regulating authority.
Remove the sediment sludge from the bottom of the unit using the vacuum hose. For large
Stormceptor units, a flexible hose is often connected to the primary vacuum line for ease of
movement in the lower chamber.
Units that have not been maintained regularly, have surpassed the maximum recommended
sediment capacity, or contain damaged components may require manned entry by trained
personnel using safe and proper confined space entry procedures.
ure 7.
ure 8.
A maintenance workerstationed at tin above ground surface uses a vacuum how to evacuate water, sediment, and debris from
the system.
What is required for proper disposal?
The requirements for the disposal of material removed from Stormceptor units are similar to that
of any other stormwater treatment Best Management Practices (BMP). Local guidelines should be
consulted prior to disposal of the separator contents. In most areas the sediment, once dewatered,
can be disposed of in a sanitary landfill. It is not anticipated that the sediment would be classified
as hazardous waste. This could be site and pollutant dependent. In some cases, approval from
the disposal facility operator/agency may be required.
What about oil spills?
Stormceptor is often implemented in areas where there is high potential for oil, fuel or other
hydrocarbon or chemical spills. Stormceptor units should be cleaned immediately after a spill
occurs by a licensed liquid waste hauler. You should also notify the appropriate regulatory
agencies as required in the event of a spill.
What if I see an oil rainbow or sheen at the Stormceptor outlet?
With a steady influx of water with high concentrations of oil, a sheen may be noticeable at the
Stormceptor outlet. This may occur because a hydrocarbon rainbow or sheen can be seen at
Stormceptor® Owner's Manual 13
very small oil concentrations (< 10 ppm). Stormceptor is effective at removing 95% of free oil,
and the appearance of a sheen at the outlet with high influent oil concentrations does not mean
that the unit is not working to this level of removal. In addition, if the influent oil is emulsified, the
Stormceptor will not be able to remove it. The Stormceptor is designed for free oil removal and not
emulsified or dissolved oil conditions.
What factors affect the costs involved with inspection/maintenance?
The Vacuum Service Industry for stormwater drainage and sewer systems is a well-established
sector of the service industry that cleans underground tanks, sewers and catch basins. Costs
to clean Stormceptor units will vary. Inspection and maintenance costs are most often based on
unit size, the number of units on a site, sediment/oil/hazardous material loads, transportation
distances, tipping fees, disposal requirements and other local regulations.
What factors predict maintenance frequency?
Maintenance frequency will vary with the amount of pollution on your site (number of hydrocarbon
spills, amount of sediment, site activity and use, etc.). It is recommended that the frequency of
maintenance be increased or reduced based on local conditions. If the sediment load is high from
an unstable site or sediment loads transported from upstream catchments, maintenance may be
required semi-annually. Conversely once a site has stabilized, maintenance may be required less
frequently (for example: two to seven year, site and situation dependent). Maintenance should be
performed immediately after an oil spill or once the sediment depth in Stormceptor reaches the
value specified in Table 3 based on the unit size.
Table 3A. (US) Recommended Sediment Depths Indicating Maintenance
STC Model
Maintenance
Sediment depth (in)
EOS Model
Maintenance
Sediment depth(ln)
Oil Storage
Depth(ln)
OSR Model
Maintenance
Sediment depth(in)
450
8
4-175
9
24
065
8
900
8
9-365
9
24
140
8
1200
1800
10
15
12-590
11
39
2400
12
24-1400
14
68
250
12
3600
17
36-1700
19
79
4800
1 15 1
48-2000
11 16
68
1 390
1 17
6000
18
60-2500
20
79
7200
15
72-3400
17
79
560
17
11000`
17
110-5000`
16
68
78W
17
13000`
20
130-6000`
20
79
16000`
17
160-7800`
17
79
1125`
17
Note:
1. The values above are torty*al standard unds.
'Perstructure.
14 Stormceptor® Owner's Manual
Table 3B. (CA & Int'I) Recommended Sediment Depths Indicating Maintenance
STC Model
Maintenance
Sediment depth (mm)
EOS Model
Maintenance
Sediment depth(mm)
Oil Storage
Depth (mm)
OSR Model
Maintenance
Sediment depth (mm)
300
225
300
225
610
300
200
750
230
750
230
610
750
200
1000
275
1000
275
990
1500
400
VOW
2000
350
2000
350
1727
2000
300
3000
475
3000
475
2006
4000
1 400
1 4000
1 400 1
1727
4009 1
375
5000
500
5000
500
2006
6000
425
6000
425
2006
6000
375
9000`
400
9000'
400
1727
9000`
425
11000`
500
10000`
500
2006
14000•
425
14000•
425
2006
14000`
425
Note:
1. The values above are for typical standard unRs.
'Per structure.
Replacement parts
Since there are no moving parts during operation in a Stormceptor, broken, damaged, or worn
parts are not typically encountered. Therefore, inspection and maintenance activities are generally
focused on pollutant removal. However, if replacements parts are necessary, they may be
purchased by contacting your local Stormceptor Representative, or Imbrium Systems.
The benefits of regular inspection and maintenance are many—from ensuring maximum
operation efficiency, to keeping maintenance costs low, to the continued protection of
natural waterways — and provide the key to Stormceptor's long and effective service life.
Stormceptor Inspection and Maintenance Log
Stormceptor Model No
Allowable Sediment Depth:
Serial Number:
Installation Date:
Location Description of Unit:
Other Comments:
Stormceptor® Owner's Manual 15
Appendix E
Stormwater Management Facility Inspection and Maintenance Log
Willamette Valley Temple I gPFFCPnsuhing Engineers
OPERATKINS AND MAINTENANCE MANUAL
Page left intentionally blank for double -sided printing
Willamette Valley Temple I gPFFCPnsuhing Engineers
OPERATKINS AND MAINTENANCE MANUAL
STORMWATER MANAGEMENT FACILITY
INSPECTION AND MAINTENANCE LOG
Property Address:
Inspection Date:
Ins ection Time:
Inspected By:
Approximate Date/Time of Last Rainfall:
Type of Stormwater Management Facility:
Location of Facility on Site (In relation to buildings or other permanent structures):
Water levels and observations (Oil sheen, smell, turbidity, etc.):
Sediment accumulation and record of sediment removal:
Condition of vegetation (Height, survival rates, invasive species present, etc.) and record of
replacement and management (mowing, weeding, etc.):
Condition of physical properties such as inlets, outlets, piping, fences, irrigation facilities, and
side slopes. Record damaged items and replacement activities:
Presence of insects or vectors. Record control activities:
Identify safety hazards present. Record resolution activities:
Appendix 3A-3 Page 1 of 1 EDSP Adopted December 03, 2012
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Willamette Valley Temple I gPFFCPnsuhing Engineers
OPERATKINS AND MAINTENANCE MANUAL
Appendix F
Stormwater Drainage Plans
Willamette Valley Temple I gPFFCPnsuhing Engineers
OPERATKINS AND MAINTENANCE MANUAL
Page left intentionally blank for double -sided printing
Willamette Valley Temple I gPFFCPnsuhing Engineers
OPERATKINS AND MAINTENANCE MANUAL
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STORM JUSTIFICATION
ACTUAL PLANT COUNTS ARE HIGHER THAN REOUI RED TO ACCOUNT FOR THE INCREASED
SQUARE FOOTAGE OF A SLOPING SURFACE. SEE CIVIL FOR RAINGARDEN DETAILS.
Stormwater Raingarden
CODE
5,953 S.I.Vegetated
S.F. IS
cheme A
Plant Category
Required
Actual Plant Count
Groundcov r
5,953 16,189
STORMWATER PLANTING EXHIBIT
PLANT SCHEDULE SWTF NLPLANrxH o LEF,s"aROVM
SVVTF GC
CODE
BOTANICAL NAME
COMMONNAME
SIZE
SPACING
QTY
oO oo
CAM QU2
CAMASSIA QUAMASH
CAMAS
4"
17' o.c.
118
0
®
CAR OBN
CAREXOBNUPTA
SLOUGH SEDGE
4"
17' o.c.
2,2&
FRA CHI
FRAGARIA CHILOFNSM
BEACH STRAWBERRY
4"
17'o.c.
1,2
M
JUN PAT
JUNCUS PATENS
SPREADING RUSH
4"
17' o.c.
1,991
ElJUN
ELK
JUNCUS PATENS ELK BLUE
SPREADING RUSH
4"
12" o.c.
565
PROJECT NUMBERS DATE
HKS: 24552 27 SEPT 2022
SCALE 1"= 20' - T'
T 10' 29 40'
SCALE: 1"=20'-0
ISSUE I I
FINAL SITE PLAN REVIEW
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Willamette Valley Temple I gPFFCPnsuhing Engineers
OPERATKINS AND MAINTENANCE MANUAL
III SW 5'^ Avenue, SURe 26W, Portland, OR 97204 ln�{{
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