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NW 114, SE 114, SEC30,,I T29N., R.5E., W.M.
<br />SNOHOMISH COUNTY, WASHINGTON
<br />General Conditions
<br />• Review installation procedures and coordinate the installation with other construction
<br />activities, such as grading, excavation, utilities, construction access, erosion control,
<br />etc.
<br />• Engineered Drawings supersede all provided documentation, as the information
<br />furnished in this document is based on a typical installation-
<br />• When installed based on Brentwood's Site Preparation and Installation Instructions or
<br />similar, a StormTank(& system can support an HS-25 load_
<br />• Coordinate the installation with manufacturer's representative/distributor to be on -site
<br />to review start up procedures and installation instructions.
<br />• Components shall be unloaded, handled and Stored in an area protected from traffic
<br />and in a manner to prevent damage.
<br />• Assembled modules may be walked on, but vehicular traffic is prohibited until backfilled
<br />per Manufacturer's requirements. Protect the installation against damage with highly
<br />visible construction tape, fencing, or other means until construction is complete_
<br />Ensureall construction occurs in accordance with Federal, Provincial and Local Laws,
<br />Ordinances, Regulations and Safety Requirements.
<br />0 Extra care and caution should be taken when temperatures are at or below 40' F (4.4°
<br />Cy
<br />1.0 StormTank@ Assembiv
<br />StormTanke Modules:
<br />StormTank(& modules are delivered to the site as pelletized components requiring simple
<br />assembly. No special equipment, tools or bonding agents are required; only a rubber mallet
<br />A single worker can typically assemble a module in two minutes.
<br />ASSEMBLY INSTRUCTIONS:
<br />1. Place a platen on a firm level surface and insert the eight (8) columns into the platen
<br />receiver cups, Firmly tap each column with a rubber mallet to ensure the column is
<br />seated.
<br />2. Place a second platen on a firm level surface- Flip the previously assembled
<br />components upside down onto the second platen, aligning the columns into the
<br />platen receiver cups.
<br />3. Once aligned, seat the top assembly by afternating taps, with a rubber mallet at each
<br />structural column until all columns are firmly seated.
<br />SIDE PANEL
<br />4. If side panels are required, firmly tap the top platen upward to raise the top platen.
<br />Insert the side panel into the bottom platen.
<br />5. Align the top of the side panel with the top platen and firmly seat the top platen
<br />utilizing a rubber mallet,
<br />GENERAL NOTES:
<br />. Remove packaging material and check for any damage. Report any damaged
<br />components to a StorrnTarrkO Distributor or Brentwood personnel.
<br />. Storm-Fanke,) components are backed by a one year warranty, when installed per
<br />manufacturers recommendations.
<br />2.0 Basin Excavation
<br />-1. Stake out and excavate to elevations per approved plans.Excavation Requirements -
<br />a. Sub -grade excavation must be a minimum of 6' (152 min) below designed
<br />StormTankO Module invert.
<br />b. The excavation should extend a minimum of '12' (305 mm) beyond the
<br />StorrnTankO dimensions in each length and width (an
<br />additional 24' [610 min] in total length and total width) to allow fix adequate
<br />placement of side backffll material-
<br />c, Remove objectionable material encountered within the excavation, including
<br />protruding material from the walls.
<br />d . Furnish, install, monitor and maintain excavation support (e.g,, shoring, bracing,
<br />trench boxes, etc-) as required by Federal, Provincial and Local Laws,
<br />Ordinances, Regulations and Safety Requirements.
<br />3.0 Sub Grade Requirements
<br />1. Sub grade shall be unfrozen, level (plus or minus 1%), and free of lumps or debris
<br />with no standing water, mud or muck_ Do not use materials nor mix with materials
<br />that are frozen andlor coated with ice or frost.
<br />2. Unstable, unsuitable andior compromised areas should be brought to the Engineer's
<br />attention and mitigating efforts determined prior to compacting the sub-grade-
<br />1 Sub -grade must be compacted to 95% Standard Proctor Density or as approved by
<br />the Engineer of Record. If code requirements restrict subgrade compaction, it is the
<br />requirement of the geotechnical Engineer to verify that the beating capacity and
<br />settlement criteria for support of the system are met. '
<br />The Engineer of Record shall reference Brentwood document Appendix A for minimum
<br />soil bearing capacity required based on Load Rating and top cover depth. Minimum
<br />soil bearing capacity is required so that settlements are less than V through the entire
<br />sub -grade and do not exceed long-term IlTdifferential settlement between any two
<br />adjacent units within the system. Sub -grade must be designed to ensure soil bearing
<br />capacity is maintained throughout all soil saturation levels.
<br />4.0 Leveling Bed Installation
<br />1, Install geotextile fabric and/or liner material, as specified -
<br />a. Geotextile fabric shall be placed per manufacturer's recommendations_
<br />b. Additional material to be utilized for wrapping above the system must be
<br />protected from damage until use,
<br />2. After the geotextile is secured, place a minimum 6'(152 mm) Leveling Bed.
<br />a. Material should be a 3f4' (19 mm) angular stone meeting Appendix
<br />B - Acceptable Fill Material.
<br />b.Material should be raked free of voids, lumps, debris, sharp objects and plate
<br />vibrated to a level with a maximum 1% slope.
<br />3. Correct any unsatisfactory conditions,
<br />5.0 StormTank(& Module Placement
<br />1. 1, Install geotextile fabric andlor liner material, as specified.
<br />a. Geotextile, fabric shall be placed per manufacturer's recommendations.
<br />b- Additional material to be utilized for wrapping above the system must be
<br />protected from damage until use.
<br />2. Mark the footprint of the modules for placement.
<br />a. Ensure module perimeter outline is square or similar prior to Module placement.
<br />b. Care should be taken to note any connections, ports or other irregular units to
<br />be placed_
<br />3, Install the individual modules by hand, as detailed below.
<br />a. The modules should be installed as shown in the StormTankO submittal
<br />drawings with the short side of perimeter modules facing outward, except as
<br />otherwise required.
<br />b. Make sure the toplbottom platens are in alignment in all directions to within a
<br />maximum IA' (6.4 mm).
<br />c. For double stack oonfigurationsi
<br />i. Install the bottom module first. DO NOT INTERMIX VARIOUS
<br />MODULE HEIGHTS ACROSS LAYERS. Backfilling prior to
<br />proceeding to second layer is optional
<br />ii. Insert stacking pins (2 per module) into the top platen of the bottom
<br />module.
<br />ill. Place the upper module directly on top of the bottom module in the
<br />same direction, making sure to engage the pins.
<br />4. Install the modules to completion, taking care to avoid damage to the geotextile
<br />and/or liner material.
<br />5. Locate any pods or other penetration of the StonliTanke.
<br />a, Install ports1penetrations in accordance with the approved submittals, contract
<br />documents and manufacturer's recommendations.
<br />6. Upon completion of module installation, wrap the modules in goolextile fabric and/or
<br />liner.
<br />a. Geotextile fabric shall be wrapped and secured per manufacturer's
<br />recommendations.
<br />b. Seat any ports/penetrations per Manufacturer's requirements
<br />Notes:
<br />• If damage occurs to the geotextile fabric or impermeable liner, repair the material in
<br />accordance with the geortextilefliner Manufacturer's recommendations.
<br />6.0 Side Backfill
<br />1. Inspect all geotextile, ensuring that no voids or damage exists; which will allow
<br />sediment into the StormTankO system,
<br />2- Adjust the stonelsoil interface geotextile along the side of the native soil to ensure the
<br />geotextile is taught to the native soil,
<br />3. Once the geotextie is secured, begin to place the Side Backfill
<br />a. a, Material should be a 34' (19 mm) angular stone meeting Appendix
<br />S -Acceptable Fill Material
<br />b. b. Backfill sides "evenly" around the perimeter without exceeding
<br />single 12" (305 min) lifis-
<br />c. Place material utilizing an excavator, dozer or conveyor boom.
<br />d. Utilize a plate vibrator to settle the stone and provide a uniform distribution.
<br />Notes:
<br />LAMELD
<br />• Do not apply vehicular load to the modules during placement of side backfilL All
<br />material placement should occur with equipment located on the native soil surrounding
<br />the system.
<br />• If damage occurs to the geotextile fabric or impermeable liner, repair the material in
<br />accordance with the geotextilefliner Manufacturer's recommendations.
<br />7.0 Top Backfill {Stone)
<br />Sil Houser'%TayN
<br />Renton, WA 98057 LTilked States
<br />Ph: (425) 254-1075
<br />N-ww.la)fieldgroup.com
<br />1. Begin to place the Top Backfill.
<br />a. Material should be a 3/4'(19 mm) angular stone meeting Appendix
<br />B - Acceptable Fill Material.
<br />b. Place material utilizing an excavator, dozer or conveyor boom (Appendix
<br />SINGLE STACK
<br />C - Material Placement) and use a walk -behind plate vibrator to some the stone
<br />and provide an even distribution.
<br />MODULE SYSTEM
<br />DO NOT DRIVE ON THE MODULES WITHOUT A MINIMUM 12" (306 mm) COVER.
<br />2. Upon completion of Top Backfilling, wrap the system in geotextile fabric and/or liner
<br />Total Storage Volunie
<br />71.88429 ft'
<br />INIodule Storage Volume
<br />6.914.69 fll
<br />per manufacturer's recommendations.
<br />1 Install metallic tape around the perimeter of the system to rnark the area for future
<br />utility detection,
<br />Stone Storage Nloltuile
<br />969.60 ft'
<br />Notes:
<br />• If damage occurs to the geotextile fabric or impermeable liner, repair the material in
<br />System Footprint
<br />3.184 ft�
<br />accordance with the geotextileliner Manufacturers recommendations,
<br />Estimated Geritextile Fabric
<br />LP6--1,679_50ydz
<br />8.0 Suitable Compactable Fill
<br />Estitnated Liner
<br />13,500 fF
<br />Following Top Backfill placement and geotexfile fabric wrapping; complete time installation as
<br />noted below.
<br />Estimated Stone Voluine
<br />266.67 yd'
<br />Vegetated Area
<br />1, Place fill onto the geotextile.
<br />a. Maximum IT (305 mm) lifts, compacted with a vibratory plate or walk behind
<br />Excamation Required
<br />648.59 yd'
<br />roller to a minimum of 90% Standard Proctor Density.
<br />Excavation Depth
<br />5.00 ft
<br />b- The minimum top cover to finished grade should not be less
<br />than 24" (610 mm) arid the maximum depth from final grade to the bottom of the
<br />lowest module should not exceed I V (3.35 in),
<br />2. Finish to the surface and complete with vegetative cover.
<br />Stone Type
<br />Clear
<br />Impervious Area
<br />Stone Void Space
<br />4M'o
<br />I, Place fill onto the geotextile.
<br />a. Maximum 12" (305 min) lifts, compacted with a vibratory plate or walk behind
<br />roller to a minimum of 90% Standard Proctor Density.
<br />Nlo&ile Type
<br />ST-36
<br />THE LANDLNG AT
<br />b. The minimum top cover to finished grade should not be less
<br />than 24' (610 min) and the maximum depth from final grade to the bottom of the
<br />lowest module should not exceed 11'(3.35 m),
<br />PORT GARDNTR
<br />Everett, OVA
<br />2. Finish to the surface and complete with asphalt, concrete, etc.
<br />REV. Record of Changes Date By
<br />Notes:
<br />A
<br />PrelitninaryDrawing
<br />24SEPI8
<br />KH
<br />• A vibratory roller may only be utilized after a minimum 24" (610 mm) of compacted material has
<br />been installed or for the installation of the asphalt wearing course.
<br />• If damage occurs to the geotextile fabric, repair the material in accordance with the geotextile
<br />Manufacturer's recommendations.
<br />• For most recent installation guidelines visit:
<br />http:/IWWW.brerdwoodindustries.com/products/stormwater-managementfstormtanvimodule.phWeature5
<br />9.0 Inspection and Maintenance
<br />If the following inspections and maintenance procedures are not followed as specified below
<br />then the and -user is responsible for the performance of the modules. These Maintenance
<br />procedure must be performed after a heavy rainfall, flooding or any incident that will vary the
<br />flow of water drastically.
<br />Inspection1.
<br />Inspect all observation ports, inflow and outflow connection and the discharge area
<br />2. Identify and log any sediment and debris accumulation, system backup, or discharge
<br />rate changes,
<br />Page Narne.
<br />Stipplementary Notes
<br />Drawn by:
<br />Checked By:
<br />3. If there is a sufficient need for a cleanout, contact a local cleaning company for
<br />assistance.
<br />KI-f
<br />Name
<br />Cleaning:
<br />1. If pretreatment device is installed, follow manufacturer recommendations.
<br />Scale
<br />NTS
<br />Date:
<br />24SEP 18
<br />2- Using vacuum pump truck, evacuate debris from the inflow and outflow points.
<br />Sheet:
<br />3. Flush the system with clean water, forcing debris from the system.
<br />4- Repeat steps 2 and 3 until no debris is evident.
<br />06 OF 07
<br />2SUPPLEMEATTARJVNOTES
<br />1,�,4 N. T. S.
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<br />TIFUT,
<br />Aqua -Swirl Polymer Coated Steel (PCS)
<br />Stormwater Treatment System
<br />Unless other traffic barriers are present,
<br />bollards shall be placed around access riser(s)
<br />in non -traffic areas to prevent inadvertent
<br />loading by maintenance vehicles.
<br />48"
<br />If traffic loading (HS-25) is required or anticipated, a 4-foot [1.22 m]
<br />diameter, 14-Inch 1356 min] thick reinforced concrete pad must be
<br />placed over the Stormwater Treatment System Riser to support and
<br />level the manhole frame, as shown. The top of riser pipe must be
<br />wrapped with compressible expansion joint material to a minimum
<br />1-Inch [25 min] thickness to allow transfer of wheel loads from
<br />manhole cover to concrete slab. Manhole cover shall bear on concrete
<br />slab and not on riser pipe. The concrete slab shall have a minimum
<br />strength of 3,000 psi [20 11 and be reinforced with #4 [13 mm]
<br />reinforcing steel as shown. Minimum cover over reinforcing steel shall
<br />be 1-inch [25 mm]. Top of manhole cover and concrete slab shall be
<br />level with finish grade.
<br />co-
<br />[1219 min] Min.
<br />41/2"
<br />[114mm]
<br />Cover
<br />'Soil2"
<br />mmln1c_
<br />1/2
<br />�4.
<br />8
<br />.
<br />. . .
<br />.
<br />#4 [13 mm] Reber
<br />0 6, 1152
<br />J
<br />. . . . . .
<br />Ram. [13 min]
<br />203
<br />.. .
<br />. . . .
<br />Each Way
<br />Gravel BaCM111
<br />ill V
<br />[25 rum] (25 mm]
<br />Gravel k1111
<br />3,000 psi [20 MPa]___1
<br />Frarn
<br />Riser
<br />Place small amount of
<br />(min) concrete
<br />T"" _J
<br />concrete (3,000 psi [20
<br />E'411,m`s2�11TIcm,11.11
<br />&:IN'
<br />Wrap Compressible Expansion
<br />Sa&fIll (90%
<br />Proctor Density) MPa] (min)] to support
<br />ste,Ia
<br />Joint Material to a minimum Manhole Frame & Cover Detail
<br />and level manhole frame.
<br />Backfill (90%
<br />Proctor Density)
<br />�[112
<br />ser
<br />1-inch [25 mm] thickness around For Non -Traffic Areas Only
<br />DO NOT allow manhole
<br />top of riser to allow transfer of
<br />NTS
<br />frame to rest upon riser.
<br />Manhole Frame & Cover Detail
<br />inadvertent loading from
<br />For Traffic Loading Areas
<br />manhole cover to concrete slab.
<br />NTS
<br />F--A 03011
<br />[0762 mm] 1511
<br />[381 mm] PCS Max
<br />-Inlet Outlet
<br />4211
<br />[1067 mm] 18 '0** Pipe coupling
<br />by Contractor.
<br />12" [305 mmi]
<br />long Stub -out
<br />by Manufacturer.
<br />Internal Baffles
<br />42 Octagonal Base Plate
<br />[1067 mm]
<br />Plan View
<br />41/2"
<br />Note: As an alternative, 42-inch OD, HS-20/25
<br />rated precast concrete rings may be substituted.
<br />14-inch thickness must be maintained.
<br />Manhole Frame and
<br />Cover by Manufacturer.
<br />(See Details)
<br />Varies
<br />6011 Swirl
<br />(1524 mm) ---F
<br />[152 mm]
<br />Section A -A
<br />• Please see accompanied Aqua -Swirl
<br />specification notes.
<br />• See Site Plan for actual system orientation.
<br />Orientation may vary from 900, 1800, or
<br />custom angles to meet site conditions.
<br />Rim elevations to match finished
<br />grade.
<br />511
<br />[127 mm] MH Frame
<br />-------------------
<br />1811 -
<br />[457 mm]
<br />Aqua -Swirl Concentrator Model AS-2 BYP PCS Sta-ndard Detail
<br />r_27_AQUA SWIRL DETAIL
<br />C4.4) N.TS.
<br />lilkil 'Ji-tl 1-111111, 1 1 ill
<br />UOL-elan excaiiiator, skid Wader
<br />No DAJMF4NG by
<br />SMALL DOZE
<br />Stailic rollers ONLY
<br />ardawkitoplawariawrial,(MOL
<br />diump truckg. No
<br />ONLY (Max, grasis
<br />it
<br />tire pernaud u rm i
<br />grim a Pe rattl ng Wadi of 6,CW I Ills,
<br />wheel loads unt#
<br />cipmthng load of
<br />ccimpaided cow
<br />EZ721 kgl or kss).
<br />appirowd by
<br />6,4W Itit [2 721 kgl
<br />exceeds 24f=
<br />Engin"rof
<br />utlipft excanlator b1 Idly mitifft or stom
<br />No DUMPING by
<br />Utillm an ecavm
<br />cowofftlar, positioned oft, of
<br />clumptrucl1h.fila
<br />cc sIdd loader J�
<br />vpterin, to unkformly backfill an
<br />whW loads unli
<br />girassoper4ffing
<br />top of the modules. No DUMPING
<br />appmved by
<br />loatill of 6= lbs.
<br />drect � orft modu1in by dump
<br />f nillineerof
<br />11Zn1 kd oncr a
<br />min, ir In% m nij
<br />has been plated
<br />and cam paned
<br />Udlize exenvair buck*t or stone
<br />tanlivilior, pmfl%nad aff of
<br />systeftto unftrmly b&Mll
<br />around modules. Stone to be
<br />Placed in marx- Ir " mm) Ift
<br />Una stone reaches; top of
<br />modu Its,
<br />11111,11772-41
<br />Notm
<br />2,
<br />2. Alacm contzi•d a Brmtweled repnwantothw1dkdTLbutarpddr to tutiUmUm of univ "mmit not Mited ubme.
<br />1 Dwftpnft apengrknis it may bir necemyw utft dunlipi opovOorisfir pwft equomam AddftmW preamckm
<br />shwNbe utfflkiinif to ftk the danW dktwoe andprievim runkV of OW road bmw
<br />t It h recisimraded that aN hittckfift cipmadow be compkted wth ilow Illimm dp nitisum vthldn such as m KIW aillmlitwom
<br />swsteer4 e& M squilpoilliew is to acem systwin hy is lewd approam to the'4&5:......
<br />•
<br />Know what's below.
<br />UTIWYCONFLICTNOTE.. Call before you dig.
<br />/ -A UT101V -
<br />THE CONTRACTOR SHALL BE RESPONSIBLE FOR VERIFYING THE LOCATION,
<br />DIMENSION, AND DEPTH OF ALL EXISTING UTILITIES WHETHER SHOWN ON
<br />THESE PLANS OR NOT, BY POTHOLING THE UTILITIES AND SURVEYING THE
<br />HORIZONTAL AND VERTICAL LOCATION PRIOR TO CONSTRUCTION. THIS
<br />SHALL INCLUDE CALLING UTILITY LOCATE 0 1-800-424-5555 POTHOLING
<br />ALL OF THE EXISTING UTILITIES AT LOCATIONS OF NEW UTILITY CROSSINGS
<br />TO PHYSICALLY VERIFY WHETHER OR NOT CONFLICTS EXIST. LOCATIONS
<br />OF SAID UTILITIES AS SHOWN ON THESE PLANS ARE BASED UPON THE
<br />UNVERIFIED PUBLIC INFORMATION AND ARE SUBJECT TO VARIATION. IF
<br />CONFLICTS SHOULD OCCUR, THE CONTRACTOR SHALL CONSULT WITH
<br />INSIGHT ENGINEERING COMPANY TO RESOLVE ALL PROBLEMS PRIOR TO
<br />SUPPLEA&VTARYA10TES
<br />C4.4,) N. T. S.
<br />
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