HomeMy WebLinkAboutKlein, Chuck Auburn Auto Pointe
Return Address:
City of Auburn
City Clerk
25 West Main
Auburn, WA 98001
20080514002189
r 4,t rvtif PACIFIC NW TIT EAS 111.00
' 1 NOT P1 PAGE001 OF 028
: 05/14/2008 15:29
Roccrds ; KING COUNTY, WA
00.
y
By Deputy
Above this line reserved for recording information.
STORM WATER EASEMENT AND MAINTENANCE AGREEMENT
GRA08-0002
j"to
Reference # (if applicable): N/A
Grantor/Borrower: Mr. Chuck Klein
Grantee/Assignee/Beneficiary: City of Auburn
Legal Description/STR: SE % S 19 - T2 IN - R5E
Assessor's Tax Parcel ID#: 192105-9249
THIS EASEMENT AND AGREEMENT made and entered into this
c? 9 day of 2008, by and between the City of Auburn, a
municipal corporation of King County, Washington, hereinafter referred to as "CITY" and
Mr. Chuck Klein hereinafter referred to as "PROPERTY OWNER".
WHEREAS, PROPERTY OWNER has applied for certain permits with the CITY
for the construction of facilities for Auburn's Auto Pointe located at 1344 17th Street SE,
which create impervious surface; and
WHEREAS, the PROPERTY OWNER will complete a storm system; and
WHEREAS, the PROPERTY OWNER and the CITY desire that the storm system
be maintained to provide adequate facilities for controlling both the quantity and quality of
storm drainage; and
WHEREAS, for maintenance of a storm system it is necessary to have appropriate
right-of-way to bring in equipment to conduct maintenance functions; and
WHEREAS, maintenance requirement is a covenant running with the land and
binding upon all heirs, successors and assigns of both parties; and
Std document(s) were filed for
4600r'd by Pacific Nm#wmst 1-ft ab
Storm Water Easement and Maintenance AgR nt 3Xati1lrW as to proper sxs&*m or
Page 1 of I4' .' K Z Co. Rowrds 9 b ns affect apart tile.
By , Deputy
WHEREAS, the parties desire that this Agreement be recorded to advise heirs,
successors and assigns of both parties as to the existence of this easement and agreement;
and
WHEREAS, an easement is needed to bring in maintenance equipment; and
WHEREAS, the parties are both desirous of permitting inspection of the storm
system to make certain that it is functioning properly and for purposes of determining the
appropriate repairs.
NOW, THEREFORE, BASED UPON MUTUAL COVENANTS TO BE
DERIVED THE PARTIES AGREE AS FOLLOWS:
Section 1, EASEMENT
PROPERTY OWNER hereby provides a non-exclusive easement to the City for
access, inspection, and maintenance for the purposes of this Agreement and the attached
Storm Water Pollution Prevention Plan, over, under and on that real estate described in
Exhibit "A" & "B" and on that portion of the property as showing on the approved
Record Drawings revised pursuant to construction records for the City of Auburn under
Permit No. GRA08-0002, which record drawings are hereby incorporated by reference as if
set out in full. This easement shall be a burden to that real estate which is legally described
and attached as Exhibit "A" & "B" and incorporated herein by this reference, and shall be
a benefit to the City Storm Drainage Utility System.
Section 2, HEIRS, SUCCESSORS AND ASSIGNS
This Agreement shall be binding upon the heirs, successors and assigns of the
parties.
Section 3, MAINTENANCE
The PROPERTY OWNER agrees to maintain the storm system in accordance with
the ordinances and all applicable codes of the CITY and the Storm Water Pollution
Prevention Maintenance and Operation Schedule attached as Exhibit "C" and incorporated
herein by this reference. The PROPERTY OWNER does hereby agree that the CITY may
enter onto the property of the PROPERTY OWNER via the easement described above to
inspect and perform necessary maintenance if, after the PROPERTY OWNER is given
notice to maintain, the PROPERTY OWNER fails to maintain. Further, the PROPERTY
OWNER agrees the CITY may enter onto the property of PROPERTY OWNER via the
easement described above to perform emergency maintenance in the event of the storm
system's failure which might result in adverse impacts(s) on public facilities or private
facilities of other property owners.
Storm Water Easement and Maintenance Agreement
Page 2 of 14
In both events the PROPERTY OWNER agrees to reimburse the CITY for the costs
incurred by the CITY in maintaining the storm system. Should the CITY incur attorney's
fees and/or costs in enforcing the agreement and/or in maintaining or collecting
maintenance fees, the PROPERTY OWNER agrees to pay reasonable attorney's fees and
all costs incurred by the CITY.
Section 4, ACKNOWLEDGMENT OF OTHER ENFORCEMENT ACTIONS
PROPERTY OWNER acknowledges that there may be liability for violations of
codes that could result in additional fines and/or the possibility of incarceration in addition
to the fees for maintenance should violations occur.
EXECUTED as of the date first written above.
CITY OF AUBURN
im Carlaw, Storm Drainage Engineer Date
STATE OF WASHINGTON)
)ss.
County of King )
I certify that I know or have satisfactory evidence that Tim Carlaw is the person who
appeared before me, and said person acknowledged that he signed this instrument, on oath
stated that he was authorized to execute the instrument and acknowledged it as the
STORM DRAINAGE ENGINEER of THE CITY OF AUBURN to be the free and
voluntary act of such party for the uses and purposes mentioned in this instrument.
Dated
eADG4 11,
p +0 TA., i t V < ?F i
«. m
No 1 r th tate of Washington
"/IWASResi bWq C ? Lnni
My appo1gtt*1et*` pires / I X 01
Storm Water Easement and Maintenance Agreement
Page 3 of 14
(?a y, A y. o S-
Owner Date
Owner Date
STATE OF WASHINGTON)
) ss
COUNTY OF KING )
I ?cceertifythat I know or have satisfactory evid ce that
1. and T09,1 J. -e i N
is/are the person, who appeared before niie, and said individu 1(s) acknowledged that
he/she/they signed this instrument and acknowledged it to be-T is/her/their free and
voluntary act for the uses and purposes mentioned in this instrument.
Dated I /0 9' o
L. IRA 40 It,,
L /,8 k?u
Notary Public ' and for the State o?as on
Residing at csh Co cA-n? Y-
i My appointment expires i / (9 ?a o
?' WA S H\
HS/tlb
File: #1192
REF. H:\Development\Projects\Auburn's Auto Pointe AdditionTegal Documents\2008
Storm Water Easement and Maintenance Agreement
Page 4 of 14
EXHIBIT A
LEGAL DESCRIPTION:
J tit " .s fthe Cit} of u urn t Lisp Ad 0
justment rec riled wider
1L _1 [.,A 0()(0-87, Audito."s Fitz Nu. 870306417, Ieys portion fear
mad per Re cAndin No- ?1010123 002407, re ccf-ds oaf ing Coua ,
\'Va511117I'llon.
PARCEL NUNIBE
1.15-9249
01?' ?? -z
0 1 r ?yi
Storm Water Easement and Maintenance Agreement
Page 5 of 14
EXHIBIT B
17TH BEET S.E.
*+ 3
EXIST. W
z
46.5 Ew
FXIST.
15` ° N 04"x' E
SITE EXHIBIT
r'te'
Storm Water Easement and Maintenance Agreement
Page 6 of 14
EXHIBIT C
Date: November 15, 2007
PrePared for:
Mr. Chck.Klein
clo, Atiburn's Auti P-ointey 15
1344 17"' Strut S
E n ?7Lo
?'+ ,t
.
Aatnjlit, Wl! glSO I? s!?i F
Prepared by:
POE Engi- eer ng; _ ncr
CIVIL & STRUCTHR,4I. ENGC'NEE.RlNG/C0NS 1,-J'jN
1314 8"' Street NF, Suite2101
Auburn, Washiji ;tool 98002
(253) 833-4052
fax (253) 833-4053
JOB O.07-014
Storm Water Easement and Maintenance Agreement
Page 7 of 14
STORM WATER POLLUTION PREVENTION
MAINTENANCE and OPERATION SCHEDULE
for
AUBURN'S AUTO POINTE ADDITION
GRA NO. 08-0002
Site Address:
The project is located in SE'/ of Section19, T21 N, RSE, W.M., at 1344 17th
Street SE. The tax parcel number is 192105-9249.
Introduction:
This storm water pollution prevention plan has been prepared to address
the City of Auburn's site development and storm drainage requirements for
the proposed Auburn's Auto Pointe Addition located at 1344 17th Street SE.
The site has an area of approximately 1.88 acres and is currently fully
developed as an auto sales and service business under C.O.A. FA00031-
99. The following work is proposed for addition: 1. Fill the existing
bioswale and add new parking; 2. Construct a new 3,690 sf
service/detail/wash building; 3. eliminate the existing control structure and
re-route storm system to the existing infiltration trench via a new AS-3
Aqua-Swirl water quality manhole; 4. re-pave as required to restore surface
drainage to catch basins; and 5. route floor drains from the new
service/wash bays to the existing oil/water separator.
The subject site is currently used as an auto sales/service business
including surface retention in the sales lot, a biofiltration swale and a 100'
infiltration trench with manholes each end.
According to the City of Auburn's Construction Standards for storm water
management, the city requires storm water quantity and quality control to all
proposed developments. Currently all of the storm water runoff from the
landscaped, building and pavement areas is collected in a series of catch
basins. This water will be conveyed by existing storm drainage pipe to an
existing storm water infiltration trench (North side of property adjacent to
17th Street) via a new Aqua-Swirl AS-3 water quality manhole. The storm
water is infiltrated into the ground via the infiltration trench with over flow at
the driveway to 17th Street SE.
Storm Water Easement and Maintenance Agreement
Page 8 of 14
Plan Goal:
The specific purpose for the storm water facility is to minimize pollution that
is typically associated with modern development. In general, pollution from
motor vehicles and pollution generated from erosion. Attached to this
narrative is a maintenance manual, which offers guidelines to the owner for
storm water facility maintenance.
Prevention BMP'S:
The catch basins shall have stenciled on them "DUMP NO WASTE -
DRAINS TO STREAM." The owner shall be responsible for sweeping the
lot, installing storm drainage stenciling and provide spill control procedures.
In case of spill call DOE at 1-425-649-7000. The catch basins, Aqua-Swirl
manhole, and infiltration trench / manholes shall be visually inspected for
accumulation of debris and silt and will be maintained as required by this
pollution prevention plan and attachments.
Maintenance Standards for Drainage Facilities (from the Department of
Ecology Storm Water Manual, August 2001)
No. 5 - Catch Basins
Aqua-Swirl System Document - Attached
Treatment BMP'S:
An Aqua-Swirl AS-3 water quality manhole has been installed to treat runoff
for conventional pollutants. The Aqua-Swirl manhole was designed to treat
the 100 year post development flows of 1.77 cfs, which is greater than 64%
of the 2-year storm event (water quality storm), for water quality treatment.
In addition retention is provided (with a 1.20 factor of safety) within the
voids in the trench & gravel manhole surrounds along with surface ponding
to retain the volume created by the 100-year storm event while infiltrating
the 100 year storm developed storm event.
Inspection/Maintenance:
Storm Water Easement and Maintenance Agreement
Page 9 of 14
Regular inspections of the drainage facilities should be carried out twice per
year, in the spring and fall. The responsible party should keep records of
these inspections available for review by the City. Additional inspections
may be required after severe storms.
Routine maintenance of the site will include mowing, care of landscaping
and the removal of trash and debris from the drainage system. The parking
lots and driveways should be kept clean and in repair. Events such as
major storms or heavy winds will require immediate inspections for
damages.
To ensure proper water quality and treatment, the catch basins, Aqua-Swirl
manhole, and infiltration trench must be properly maintained. Be careful to
avoid introducing landscape fertilizer to receiving waters or groundwater
Catch basins shall be cleaned when sump is 1/3' full of sediment or debris.
Person of Responsibility:
Charles D. & Doria J. Klein
c/o Auburn's Auto Pointe
134417 th Street SE
Auburn, WA 98002
Phone: 253-887-0300
Design Engineer:
POE Engineering, Inc.
13148 th Street NE Suite 201
Auburn, WA 98002
Phone: 253-833-4052
Plan and/or Information Updates:
The City of Auburn Storm Drainage Utility section is to review and approve
any changes to this Storm Water Pollution Prevention Plan prior to changes
in its implementation. Additionally, any changes in ownership or person of
responsibility are to be reported to the City Storm Drainage Utility section.
Storm Water Easement and Maintenance Agreement
Page 10 of 14
INSPECTION/MAINTENANCE CHECKLIST
STRUCTURE DATE OF INSPECTION/MAINTENANCE
Results/
Maintenance Date
Inspection
All Catch Basins Results
Maintenance
Done
Aqua-Swirl Manhole Inspection
Results
Maintenance
Done
Inspection
Conveyance Pipes Results
Maintenance
Done
Storm Water Easement and Maintenance Agreement
Page 11 of 14
Maintenance Standards for Drainage Facilities:
The facility-specific maintenance standards contained in this section are
intended to be conditions for determining if maintenance actions are
required as identified through inspection. They are not intended to be
measures of the facility's required condition at all times between
inspections. In other words, exceeding these conditions at any time
between inspections and/or maintenance does not automatically constitute
a violation of these standards. However, based upon inspection
observations, the inspection and maintenance schedules shall be adjusted
to minimize the length of time that a facility is in a condition that requires a
maintenance action.
Storm Water Easement and Maintenance Agreement
Page 12 of 14
No. 5 - Catch Basins
Maintenance Defect Conditions When Maintenance is Needed Results Expected When
Component Maintenance is
performed
General Trash & Trash or debris which is located immediately No Trash or debris
Debris in front of the catch basin opening or is located immediately in
blocking inletting capacity of the basin by front of catch basin or on
more than 10%. grate opening.
Trash or debris (in the basin) that exceeds 60 No trash or debris in the
percent of the sump depth as measured from catch basin.
the bottom of basin to invert of the lowest
pipe into or out of the basin, but in no case
less than a minimum of six inches clearance
from the debris surface to the invert of the
lowest pipe.
Trash or debris in any inlet or outlet pipe Inlet and outlet pipes free
blocking more than 1/3 of its height. of trash or debris.
Dead animals or vegetation that could No dead animals or
generate odors that could cause complaints vegetation present within
or dangerous gases (e.g., methane). the catch basin.
Sediment Sediment (in the basin) that exceeds 60 No sediment in the catch
percent of the sump depth as measured from basin.
the bottom of basin to invert of the lowest
pipe into or out of the basin, but in no case
less than a minimum of 6 inches clearance
from the sediment surface to the invert of the
lowest pipe.
Structure Top slab has holes larger than 2 square Top slab is free of holes
Damage to inches or cracks wider than 1/4 inch. and cracks.
Frame and/or
Top Slab (Intent is to make sure no material is running
into basin).
Frame not sitting flush on top slab, i.e., Frame is sitting flush on
separations of more than 3/4 inch of the the riser rings or top slab
frame from the top slab. Frame not securely and firmly attached.
attached
Fractures or Maintenance person judges that structure is Basin replaced or
Cracks in unsound. repaired to design
Basin Walls/ standards.
Bottom
Grout fillet has separated or cracked wider Pipe is regrouted and
than 1/2 inch and longer than 1 foot at the secure at basin wall.
joint of any inlet/outlet pipe or any evidence
of soil particles entering catch basin through
cracks.
Settlement/ If failure of basin has created a safety, Basin replaced or
Misalignment function, or design problem. repaired to design
standards.
Vegetation Vegetation growing across and blocking No vegetation blocking
more than 10% of the basin opening. opening to basin.
Storm Water Easement and Maintenance Agreement
Page 13 of 14
No. 5 - Catch Basins
Maintenance Defect Conditions When Maintenance is Needed Results Expected When
Component Maintenance is
performed
Vegetation growing in inlet/outlet pipe joints No vegetation or root
that is more than six inches tall and less than growth present.
six inches apart.
Contamination See "Detention Ponds" (No. 1). No pollution present.
and Pollution
Catch Basin Cover Not in Cover is missing or only partially in place. Catch basin cover is
Cover Place Any open catch basin requires maintenance. closed.
Locking Mechanism cannot be opened by one Mechanism opens with
Mechanism maintenance person with proper tools. Bolts proper tools.
Not Working into frame have less than 1/2 inch of thread.
Cover Difficult One maintenance person cannot remove lid One maintenance person
to Remove after applying normal lifting pressure. can remove cover.
(Intent is keep cover from sealing off access
to maintenance.)
Ladder Ladder Rungs Ladder is unsafe due to missing rungs, not Ladder meets design
Unsafe securely attached to basin wall, standards and allows
misalignment, rust, cracks, or sharp edges. maintenance person safe
access.
Metal Grates Grate opening Grate with opening wider than 7/8 inch. Grate opening meets
(If Applicable) Unsafe design standards.
Trash and Trash and debris that is blocking more than Grate free of trash and
Debris 20% of grate surface inletting capacity. debris.
Damaged or Grate missing or broken member(s) of the Grate is in place and
Missing. grate. meets design standards.
Storm Water Easement and Maintenance Agreement
Page 14 of 14
Aqu
a- iriTm Concentrator
Stormwater Treat,
metit Systems
The patented Aqua-Swirl M Concentrator
provides a highly effective means for
the removal of sediment, floating debris
and free-oil. Swirl technology, or vortex.
separationr is a proven form of
treatment utilized in the storrnvvater
industry to accelerate gravitational
separation. Indepe'ndent university
laboratory performance evaluations
have shown the Aqua-Swirl-lm achieves a
TSS removal of SI% calculated on a net
annual basis. See the "Performance and
Testing" Section for.more?details.
Each Aqua-Swir(T"' is. constructed of High-Density Polyethylene (HDPE), and is
therefore modular, lightweight and durable, eliminating the need for heavy lii ring
equipment during installation. Inspection and maintenance are made easy, with
oversized risers that allow for both -examination and cleanourt without entering
the chamber.
System
W Operation
The Aqua Swi,-Fm Concentrator Conveyance
Flow Diversion System - provides full
treatment of the "f=irst flush," while the
peak design storm is diverted and
channeled through the main conveyance
pipe. Many regulatory agencies are
establishing "water quality treatment flow
rates" for their areas based on the initial
movement of pollutants into the storm
drainage system.
The operation begins when stormwater enters the Aqua-SwirlThS by means of its
tangential inlet piper which induces a .circular (or vortex) flow pattern. Because
40. TM
. qua- wi Srzing Chart
Swirl C€?nveyance Water Quality Oil /Debris /Debris Sediment:
Model Inner Pipe Treatment: Storage Storage
Diameter Diameter'
oW2
.1 Capacity Capacity
(in.) (cis) (gal)
iS-2
j
2'S z ma
'
R
?
37
8
12 I ` 10
AS-3 f
3.25 I :Lo- I 16 13 ? 110 20
J AS-4 4.25 12 8 3.2 ?90 32
S-5 S-0 22 2-4 270
-5
S-Ca _ 22 3 .3 39 65
;S-7 7.0 24 I 36 ? 8.6 5? 90
AS-S 8.€3 26 42 I . 7: 115
AS-9 9.0 23 43 :K2 910 145
A -:0 I 10.0 30 11-30 180
-12 1 Z:V I 36
60
25.2
?.??'f?
G6
1) As recommended by the Center for Watershed Protection and most muhicipaliges, the
Aqua-Swirl,11, provides full treatment of the "first flush, ° while the peak design storm is
Give fed and channeled through the main conveyance pipe. Prices are based on
typical pipe diameters, larger pipe diameters are available at an additional cost,
please refer to your local representative for more information. -
2) Many regulatory agencies are establishing "water quality treatment flow rates" for their
areas based on the initial movement of pollutants into the storm drainage system. The
treatment flow rats or the ?qua-Swirl '' system is engineered to meet or exceed,the
local water quality treatment criteria. This "water duality treatment flow raLe-
typically represents approxi,„ ateiy 90% to 95% of the total annual ; uno f volume.
The design and orientation of the Aqua-Swirl T"' Concentrator generally entails -some degree of
customization. For assistance in design and specinc sizing using historical rainfall data, please refer to an
AquaShieldTM representative or go to our web site for more information to locate your representative at
w?w.AquaShieldlnc.com. CAD detaiis and specifications are available upon request.
STANDARD NOTE.
1. System. shall be designed for the following capacities:
Peak Treatment Flow: 6.3 cf
Sediment Stmage: 65 fta
OiVDcbi Is Storage. 390 gal.
k Please see accoittpanicd Aqua-SwhI
speciticatinn notes,.
" See Site Plan for actual svstem orientation
f7(0 (A '.1 IA It
S
IOW
ax
II
104"
6E
? . ,.: •.. • :' `". Frame -- ..? .
10" •; . ' ? Concrete r . ? '+
ac
?. !User
?s ? '?'.r• ? r?siw ftxm«?ua«??,la., Manhole Frame & Cover De't'ail
8qua%ie#d ? k'? ° For U-20.Traffic Loadiliq Areas 111111,111 1 Uri m 01, 1 a NTS
•Sr• a.
ntPerem Aqua--Swirl Concentrator 1
Model AS-G Standard Detail
Plan View
by Contractor.
12" Long Stub-put cover
by M.anufadgrer. 3-ryp. p f j{? ?•?• - ?,m
104"
r
L
Manhole Frame and
Dover by Manufacturer.
(See Details)
- 32°
S"ectiolx AA
Aqua-Swirl Concentrator 14
Model AS-6 Si:anda.rd Detail
Wm elevations to matcli finished
grade.. HDPE risers can be Field
cut by Contractor.
IAqua-S irTM
Specifications
I. GENERAL
This specification shall govern the performance, materials and fabrication
of the Storm water Treatment System.
II. SCOPE OF ?VORK
The Aqua-Swirl-,M Concentrator shall be provided by AquaShieldTM, Inc.
2733 Kanasita Drive, Chattanooga, TN (423-870-8888) and shall adhere to
the following material and performance specifications at the specified
design flows, and storage capacities.
III. MATERIALS
A. Stormwater Treatment system shall be made from high-density
polyethylene (HDPE) resins meeting the following requirements:
1) HDPE Material - The HDPE material supplied under this
specification shall be high density, high molecular weight as
supplied by manufacturer. The HDPE material shall conform
to ASTM D3350-98a with minimum cell classification values
of 345464C. Earlier versions of this specification will not be
accepted.
2) PHYSICAL PROPERTIES OF HDPE COMPOUND
a) Density - the density shall be no less- than 0.955
gms/ccm as referenced iii ASTM 1505.
b) Melt Index - the melt index shall be no greater than 9.0
gms/10 minutes when tested in accordance with ASTM
1238- Condition 3.2.3.
c) Flex Modulus - flexural modulus shall be 110,000 to less
than 160,000 psi as referenced in ASTM D 790,
d) Tensile Strength at Yield - tensile strength shall be 3,200
to less than 3,500 psi as referenced in ASTM D 638.
e) Slow Crack Growth Resistance shall be greater than 100
hours (PENT Test) as referenced in ASTM F 1473 or
greater than 2000 howrs as referenced in ASTM D 1693
(condition Q.
f) Hydrostatic Desfgn Basis shall be Ij6QQ psi at 23 degrees
C when tested In accordance with 6,STM D 2837.
B. REJECTLON - The Storrnwater Treatment System may be rejected
for failure to rheet any of the requi, zments.of this spec-156atiort,
M PFRPO MANCE
A. The Stormwater Treatment System shall include a 2t1---inch inner
diameter. (ID) circular , hydrodynamic • flow-through treatment
chamber i o treat the incoming water. A tarigeritiai inlet shall be
provided to induce a swirling flow pa tern. that will cause
sedimentary solids to accumulate in the bottom center of the
chamber in such a way as to prevent re-suspension of captured
panicles. An arched bai rie wall shall be provided in such a way as
to prevent floatable liquid oils and solids from exiting the treatment
chamber while enhahcing the swirling action of the stormwater.
B. The Stormwater Treatment System shall have a. sediment. storage
capacity of 20 cubic feet and be capable of capturing-L10- gallons,
of petroleum hydrocarbons. The Storrnwater Treatment System
shall have a treatment capacity of ?.S cubic feet per second
(cfs). T he Siormwater i reatmerit System shall be capable of
removing floating trash and debris, floatable oils and 800/o of total
suspended solids from stormwater entering the treatment chamber.
C. Service access to the Stormwater Treatment System shall be
provided vla 30-4nch outer cliarneter (ID) access riser(s) over the
trealtment chamber such that no confined space entry is required to
perrorm routine inspection and maintenance functions.
V, TF,8A T MEh1T ChAME?ER CONS-1 RUC-i ION
A. The treatment chamber shall be constructed from solid wall high-
densft polyethylene (HDPE) AS TM p 714 cell class 345464 c. - For
sizes above 63-inch OD, the treatment chamber shall be
constructed from profile wall HDPE ASTM F 8?4 l2SC 250 pipe or
solid wall HDP .
OM04 Aqua-Swlrr-x Concentrator Storrnwater Treatment
B. -The bottom thickness of the treatment chamber will be determined
in accordance with AS T M b1759. Calculations must be provided to
justify the thickness of the bottom.
C. The inlets and outlets shall be extrusion welded on the inside and
outside of the structure using accepted welding practice.
D. The arched baffle wail shall be constructed from HDPE and shall be
extrusion welded to the interior of the treatment chamber using
accepted welding methods with connections made at 180 degrees
of each end.
E. HDPE lifting supports may be provided on the exterior of the
Stormwater Treatment System in such a way- as to allow the
prevention of undue stress to critical components of the.
Stormwater Treatment System during loading, off-loading and
moving operations. The lifting support- shall be constructed 'as an .
integral part of the treatment chamber and extrusion welded using
accepted welding practices.
F. Top of the treatment chamber shall be built to the requirements of
the drawings: Deep burial applications shall require a reinforced
HDPE top.
G. Reinforced concrete pads spanning the treatment chamber will be
required with traffic rated frames and covers when- the Stormwater
Treatment System is used in traffic areas. A professional engineer
shall approve the design of the concrete pad and the calculations
must be included in the submittal.
H.. The manufacturer upon request can supply anti-flotation/ buoyancy
calculations. ' In addition, typical drawings of the AquaShleld
Stormwater Treatment System with concrete anti-flotation
structures can also be provided. Anti-flotatioh structure design and
approval are ultimately the responsibility of the specifying engineer.
The contractor shall provide the anti-flotation structures. -
VI. INSTALLATION
A. Excavation and bedding -'The trench and trench bottom shall be
constructed in accordance with ASTM D-2321, Section 6, Trench
Excavation, and Section 7, Installation. The HDPE Stormwa-ter
Treatment System shall be installed on. a stable base consisting of
12 inches of Class I stone materials (angular, crushed stone or
rock, crushed gravel; large void content, contains little or no fines)
as defined by ASTM D2321, Section 5, Materials, and compacted to
95% proctor density. All required safety precautions for
Stormwater Treatment System installation are the responsibility of
the Contractor.
B. Bac r?li Requirements - Backfill materials shall be Class I or II stone
materials (well graded gravels, gravelly sands; contains little or no
Fines) as defined by ASTM D2321, Section 5, Materials and
compacted to 90% proctor density. Class I materials are preferred.
1386€fill and bedding materials shall be free of debris. Back llling
shall conform to ASTM 1759, Section 4.2, 'Design Assumptions".
Backfill shad extend at least 2 feet beyond the edge of the Swirl
Concentrator for the full height to sub grade and extend laterally
into undisturbed soils.
C. Pipe CouDlinos, - Pipe couplings to and from the Stornii?ater
Treatment System shell be Fernco® or MissionT'" type flexible boot
with stainless steel tension bands. A m' I sheer guford shall be
used to protect the flex€ble boot.
VII. DIW'SIGN OF RESPONSIBIUTI '
A. Stormwater Treatment System Manufacturer -The Manufacturer
shall be responsible for delivering the Stormwater Treatment
System to the site. The system includes the treatment chamber
with debris baffle, inlet and outlet stub-outs, liming supports, 30-
inch ID service access riser(s) to grade with temporary cover, and
manhole frame(s) and cover(s).
B. Contractor - The Contractor shall be responsible for preparing the
site for the system installation including, but not limited - to,
temporary shoring, excavation, cutting and removing pipe, new
pipe, bedding, and compaction. The Contractor shall be
.responsible for furnishing. the means to lift the system components
off the delivery trucks. The Contractor shall be- responsible for
providing any concrete anti-floatation/a, ?ti-creep restraints,
anchors, collars, etc. with any straps or connection devices
required. The Contractor shall be. responsible for field cutting, if
necessary, HDPE service access risers to grade. The Contractor
shall- be responsible for sealing the pipe connections to the
Stormvater Treatment System, backfilling and furnishing all labor,
tools, and materials needed.
VIII: SUBMITTALS
The Contractor shall be provided with dimensional drawings and, when
specified, utilize these drawings as the basis for preparation of shop.
drawings showing details for construction and reinforcing. Shop drawings
shall be annotated to indicate ail materials to be used and all applicable
standards for materials, required tests of materials. and design
assumptions for structural analysis. - Shop drawings shall be prepared at a
scale of not less than '/--.inch per foot. Three ?3) hard copies of said shop
drawings shall be submitted to the Specifying Engineer for review and
approval
IX= QUALITY CONTROL 0FSPECTION
A. Materials - The quality of materials, the process of manufacture,
and the finished sections shall be subject to inspection by the
Specifying Engineer. Such inspection may be made at the place of
manufacture, or on the work site after delivery, or at both places.
The sections shall be subject to rejection at any time if material
conditions fail to meet any of the specification requirements, even
though sample sections may have been accepted as satisfactory at
the place of manufacture. ,Sections. rejected aver delivery to the
site shall be marked for identification and shall be removed from
the site at once. All sections, which are damaged beyond repair
after delivery will be rejected and, if already installed, shall be
repaired to the Specifying Engineer's acceptance level, if permitted,
or removed and replaced, entirely at the Contractor's expense.
B. Insaection - All sec`uons shall be inspected for general appearance,
dimensions, soundness, etc.
C. Defects - Structural defects may be repaired, subject to the
acceptance of the Specifying Engineer, after demonstration by the
manufacturer that strong and permanent repairs will be made. The
Specifying Engineer before final acceptance of the components
shall carefully inspect repairs.
System
Maintenance
Stormwater treatment structures'. (Including manufactured systems, ponds,
swales, etc.) long-term .performance and" ei i ective protection of receiving waters,
depends on consistent implementation of their maintenance plan. Inspection
and maintenance functions for AquaShieldTM Stormwater Treatment Systems
have been made easy,. allowing for all inspections to be performed from the
surface. An AquaShieldTM field representative will be available as needed to
assist local maintenance personnel in "the field. Please contact us for a copy of a
product-specific Inspection and Maintenance Manual.
It is important that a routine inspection and
maintenance program be established for each unit
based on (1) the volume or load of the contaminants
of concern, (2) the frequency of releases of
contaminants at the facility or location, and (3) the
nature of the area being drained.
In an effort to assure that our systems are being maintained properly,
AquaShieldT'", Inc. offers a maintenance package to all of our customers. We will
contract to perform all maintenance functions, from inspection to cieanout. In
addition, we will submit a report detailing all maintenance activities.
Inspection
All AquaShieldT14 products can be inspected
from the surface, eliminating the need. to
enter the systems to determine when
cleanout should be performed.
In most cases, AquaShieldTm. Inc.
recommends that for the first year of
operation, quarterly inspection of the
Storm water Treatment Systems. be
performed in order to develop an appropriate
schedule of maintenance.
Based upon experience from the system's first year in operation, we recommend
the inspection schedule be revised to -reflect the site=specific conditions
encountered. Typically the inspection schedule for subsequent years is reduced
to semi-annual inspection.
;-. Maintenance
The Aqua=SNVIH` has been designed to minimize and
simplify the inspection and maintenance process. The
system can be inspected and maintained completely from
the surface, thereby eliminating the need for confined
space entry.
Furthermore, the entire structure (specifically, the floor) is
accessible for visual inspection from the surface. There are
no areas of the structure that are blocked from visual
inspection or periodic cleaning..
Inspection of any free-floating oil and roatable debris can be directly observed
and maintained through the manhole access provided directly over the swirl
chamber.
Aq ua-SwIrFm Inspectimn Procedure
To inspect the Aqua-Sw rl-, a hook is needed
to remove the manhole cover. AquaShieldTM'
provides a customized manhole cover with our
logo to make it easy for maintenance crews to
locate the system in the field. We also provide
a permanent metal information plate attached
inside the access riser, which provides our
contact information, the Aqua-Swirl-lm model
size, and serial number.
The only tools required to inspect the Aqua-Swirl, system are a flashlight and
measuring, device (i.e. stadia rod) or pole. Because of tine tremendous access
provided, floating oil and debris can be observed directly from the surface.
Sediment depths can easily be determined by lowering a measuring device-to the
top of the sediment pile and to the water's surface. When the sediment pile is
within 30° to 35" of the water surface the system should be maintained.
It should be noted that in order to avoid
underestimating the volume of sediment in the
chamber, the measuring device must be care fully
lowered to the top of the sediment pile. The finer
sediment at the top of the pile, typically offers less-
resistance to the measuring device than the larger
particles.
Aq'Ua-SVV1rP` Cieanai ut procedure
Clean out of the Aqua-Swirl-6', is simple.
Free-t'loating oil and floatable debris can be
observed and removed directly through the
30" service access provided.
A vacuum truck can be used to remove the
accumulated sediment and debris. it is
important to note that. the entire sediment
storage area can be reached with a vactor
hose from the surface (reaching all the .
sides).
Disposaf of the material is typically treated in the
same fashion as catch basin cleanouts.
AquaShieldTl'l recommends that all materials
r emoved be handled and disposed of in accordance
with local.and state requirements.
An "Inspection and Maintenance Manual" is
provided With each Aqua-Swirl "' system for more
detailed maintenance procedures. On the following page, you will find sample
inspection Data Sheets.
Aqua"S irl TM
Inspection Data Sheet
Location:
Date bs ec €?
Name ista
Sediment
(in.) Distance to
Water
(in.) Fioatabie
Layer
Thickness
describe Maintenance
Peeiuire€i?
(yesInd),
Aqua-SWNTM
" . Maintenance Data Sheet
Inspector:
Location: Date:
. Time:
INSPECTION
Oenerat Site condition
Visible Evidence of Spills/ Releases Coils, grease, fuels, paints, chemicals):
Visible Evidence of Heavy Sediment Deposition:
Sciri Coreee?ttrator
Condition of Smrl Concentrator:
Condition of Baffle:
Distance to Sediment:
Distance to Water:
**Note: If sediment is less than 30" to 36" below water surace, sediment should
be removed.
CONTAMINATION REMOVAL DATA
Floating Off and Debris
Approx. Volume:
Description:
Elapsed Removal itme:
Sediment
Approx. Volume:
Description:
Elapsed Removal Time:
O tier Comments