HomeMy WebLinkAboutContract 50757 CITY SECRETARY
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CONTRACT NO.,
STORMWATER FACILITY
MAINTENANCE AGREEMENT
WATER QUALITY DEVICES
THIS AGREEMENT, made and entered into this < U day of ,
2018, by and between FW Waterside Land, LLC, acting by and through Fremon Baker,
hereinafter referred to as "Landowner", and the City of Fort Worth, hereinafter referred to
as "City".
WITNESSETH
WHEREAS, the Landowner is the owner of certain real property described as an
approximately 3.9305 acre tract located in the EVAN H. BURKE Survey, Abstract 160,
and the JAMES ROGERS Survey, Abstract 1265, Tarrant County, Texas according to the
deed recorded in Volume 388-132, Page 49, Deed Records, Tarrant County, Texas,
hereinafter called the "Property".
WHEREAS, the Landowner is proceeding to build on and develop the Property
according to the Site Plan/Subdivision Plan known as Lot 1 Block O, WATERSIDE
ADDITION hereinafter called the "Plan', which is expressly made a part hereof, as
approved or to be approved by the City and the Landowner provides for management of
Stormwater and its runoff quality within the confines of the Property; and
WHEREAS, this Agreement shall run with the land and apply to the Landowner,
its successors and assigns. The term "Landowner" shall refer to the then-current legal
owner of the Property and/or the Facility as same are herein defined; and WHEREAS, the
Landowner has determined that on-site Stormwater Management Facilities to control
sediment, nutrients, trash, debris and other floatable materials ("Facility") should be
constructed and maintained on a portion of the Property; and
RECEiVEG OFFICIAL RECORD
cIlry SECRETARY
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STORMWATER FACILITY MAINTENANCE AGREEMENT
�. an
Rev.12/29/2014
WHEREAS, the City requires that the Facility, whether one or more, as shown on
the Plan be constructed and adequately maintained by the Landowner the locations of
which are as shown in the attached Exhibit "A" ("Facility Property");
NOW, THEREFORE, in consideration of the foregoing premises, the mutual
covenants contained herein, and the following terms and conditions, the parties hereto
agree as follows:
1. The Landowner shall adequately construct and maintain the Facility at no
expense to the City of Fort Worth in accordance with the design specifications
for the Facility, attached as Exhibit "B", and the current standards then in force
and effect in the City of Fort Worth and with the Operations and Maintenance
Plan attached to this Agreement as Exhibit "C". The Facility includes all
structures required to control the quality of the storm water. Adequate
maintenance is herein defined as good working condition so that these facilities
are performing their designed functions. Maintenance forms provided by the
City, or an equivalent provided by the manufacturer of the Facility, attached to
this Agreement as Exhibit "U', are to be used to establish what good working
condition is acceptable to the City.
2. If the Landowner contracts the maintenance of the Facility with a third-party,
Landowner shall provide a copy of the contract to the City at the time this
Agreement is executed It shall be the Landowner's responsibility to ensure
that the contracting party is properly qualified to maintain the Facility and to
provide any updates to the contract as a part of the annual inspection report
discussed immediately below.
3. The Landowner shall inspect or shall cause to be inspected the Facility at
frequency specified by the manufacturer or annually, if not specified by the
manufacturer, using the inspection form in Exhibit C or equivalent by
manufacturer, and shall be compiled and submitted to the City annually. The
purpose of the inspection is to assure safe and proper functioning of the
Facility. The inspection shall cover the entire Facility. Components of the
STORMWATER FACILITY MAINTENANCE AGREEMENT 2
Rev.12/29/2014
Facility which need maintenance or replacement to perform their design
function, shall be noted in the inspection report along with the corrective
actions to be taken. The corrections identified in the inspection report must be
corrected within 45 days, and corrections once made shall be so noted in the
next inspection form
4. The Landowner hereby grants permission to the City, its authorized agents and
employees, to enter upon the Property to inspect the Facility whenever the City
deems necessary. The inspection may involve follow-up on reported
deficiencies and/or to respond to citizen complaints. The City shall provide the
Landowner copies of the inspection findings and a directive to commence with
maintenance and repairs if necessary.
5. In the event the Landowner fails to maintain the Facility as specified herein,
the City, its authorized agents and employees, may enter upon the Facility
Property and take whatever stens necessary to correct deficiencies identified in
the inspection report to protect public health, safety and welfare and to charge
the costs of such maintenance and repairs to the Landowner. It is expressly
understood and agreed that the City is under no obligation to routinely
maintain or repair the Facility, and in no event shall this Agreement be
construed to impose any such obligation on the City, such obligation is the
Landowner's.
6. The Landowner will perform the work necessary to keep the Facility in good
working order as appropriate. In the event the City pursuant to this Agreement,
performs work of any nature, or expends any funds in performance of said
work for labor, use of equipment, supplies, materials, and the like, the
Landowner shall reimburse the City upon demand, within thirty (30) days of
receipt thereof, for all actual costs incurred by the City hereunder. In the event
that Landowner fails to pay the City for the costs incurred under this section,
the City shall impress a lien for the costs of such work upon other lots owned
by the Landowner. Such lien shall be perfected by filing in the office of the
County Clerk of the county in which the Facility lies, an affidavit identifying
STORMWATER FACILITY MAINTENANCE AGREEMENT 3
Rev.12/29/2014
the real property to be charged with such lien, stating the amount thereof, and
making reference to this Agreement.
7. This Agreement imposes no liability of any kind whatsoever on the City. THE
LANDOWNER AGREES TO HOLD THE CITY HARMLESS FROM
ANY LIABILITY IN THE EVENT THE FACILITY FAILS TO
OPERATE PROPERLY. LANDOWNER COVENANTS AND AGREES
AND DOES HEREBY INDEMNIFY, HOLD HARMLESS AND DEFEND
THE CITY OF FORT WORTH, ITS AGENTS, SERVANTS AND
EMPLOYEES FROM AND AGAINST ALL COSTS, EXPENSES,
LOSSES, DAMAGES, CLAIMS OR CAUSES OF ACTION
WHATSOEVER ARISING, OR WHICH MIGHT ARISE, FROM THE
FAILURE OF LANDOWNER TO: PROPERLY INSTALL, MAINTAIN
AND REPAIR THE FACILITY, OR ANY DAMAGES CAUSED TO
PERSON OR PROPERTY DUE TO (1) FLOODING ATTRIBUTED TO
THE FACILITY OR (2) IMPROPER INSTALLATION,
MAINTENANCE AND REPAIR OF THE FACILITY , .
8. Landowner covenants and agrees that no habitable building shall be erected
within the drainage easement outlined on Exhibit "A" but this paragraph shall
not preclude construction of other improvements within the drainage easement,
which do not impede access to the Facility. This Agreement shall be recorded
among the land records of Tarrant County, Texas, shall constitute a covenant
running with the land, and shall be binding on the Landowner, its
administrators, executors, assigns, heirs and any other successors in interests,
including any property owners association.
[SIGNATURE PAGE FOLLOWS]
STORMWATER FACILITY MAINTENANCE AGREEMENT 4
Rev.12/29/2014
Executed this _ ' ' "'day of April, 2018.
Landowner
FW WATERSIDE LAND, LLC
A Delaware limited liability company
By: FW Waterside Partners LLC,
a Delaware limited liability company,
its sole member
By: Trademark Waterside, L.P.,
A Texas limited partnership,
its Managing Member
By: TW Genpar, LLC,
a Texas limited liability company,
its a artner
B
Name: r m i e
Title: Seni Vice Pre ' ent
STATE OF TEXAS §
COUNTY OF TARRANT §
jf r
Before me, the undersigned authority on this � �ay of April, 2018,
personally appeared Fremon Baker, known to me toe the person whose name is
subscribed to the foregoing instrument and acknowledged to me that the same is the act of
FW Waterside Land, LLC, and that he executed the same as its Senior Vice President and
as the act of such Corporation and for the purpose and consideration expressed in the
foregoing instrument.
PY PUe�� KIMBERLY L. SYKORA
Notary Public,State of Texas
' Notary ublic, tate of Te s
Comm.Expires 04-23-2021
Notary ID 12315194
STORMWATER FACILITY MAINTENANCE AGREEMENT 5
Rev.12/29/2014
City of Fort Worth
64
Jesus J. Chapa
Assistant City Manager
App d as to Form and Legality
'Assistant City Attortidy
A--EST 0
awn
Oty Secretary
STATE OF TEXAS
COUNTY OF TARRANT
This instrument was acknowledged before me on v /JD by
Jesus J. Chapa, Assistant City Manager of the City of Fort Worth, c(n 4half of the City of
Fort Worth.
MARIA S.SANCHEZ
# 56
My Notary ID#2256490
erl 9 T�oia/y Public, State of Texas
Expires December 19,2021]
OFFICIAL RECORD
CITY 81CROTARY
FT.WORtHo TX
STORMWATER FACILITY MAINTENANCE AGREEMENT 6
Rev.12/29/2014
ContractCompliance Manager
By signing I acknowledge that I am the rersoia responsible
torthe monitoring and administration of this contract, including
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Jame S. iviorales
Develoament Nlanaaer
EXHIBIT "A"
INSERT LEGAL DESCRIPTION
STORMWATER FACILITY MAINTENANCE AGREEMENT 7
Rev.12/29/2014
BEING a tract of land situated in the EVAN H. BURKE SURVEY,Abstract No. 160, City of Fort Worth,Tarrant County,Texas
and being part of Lot 1, Block O of Waterside Addition,an addition to the City of Fort Worth,Tarrant County,Texas according to
the plat thereof recorded in Instrument No. D217101002 of the Official Public Records of Tarrant County, Texas; embracing a
part of the portion of Phase 3, Tract 1, being a 15.131 acres to FW Waterside Land LLC County Clerk Instrument No.
214224895
Commencing at a 5/8"capped iron rod with cap stamped "KHA" recovered at the southwest comer of said Lot 1, Block O and
on the north line of said Lot 2112A, Block 4 Country Day Meadows, Fourth Filing Volume 388-161, Page53 Deed Records of
Tarrant County Texas, and then run S 75005'06" E, along the south line of said Lot 1 and the north line of said Lot 2R2A, a
distance of 168.93 feet,from which a Y,"iron rod found bears S 75°05'06" E,a distance of 27.09 feet,and over and across said
Lot 1, N 14°54'54"E,a distance of 20.70 feet to the southwest and POINT OF BEGINNING of easement being described;
THENCE N 0003'35"E, a distance of 27.17 feet to a pointfor comer,
THENCE S 89056'25"E,a distance of 27.17 feet to a point for comer;
THENCE S 0°03'35"W,a distance of 27.17 feet to a point for corner,
THENCE N 89056'25"W,a distance of 27.17 feet to the POINT OF BEGINNING
and containing 738 square feet or 0.0169 of an acre of land.
Basis for bearings are based on the Texas Coordinate System of the North American Datum of 1983 (2011) EPOCH 2010,
North Central Zone 4202(US Survey feet)from GPS observations using the RTK Cooperative Network.
Drainage Easement
SHOWING A PART OF
OF TSL' LOT 1, Block O
JAMES PAUL WARD rG17t R`�•� WATERSIDE ADDITION
REGISTERED PROFESSIONAL •JAMES PAUL�1f'.9Q. City of Fort Worth, Tarrant County, Texas
LAND SURVEYOR NO.5606 "'f"" "•"••••�•••
801 CHERRY STREET UNIT 11f'•:>.�56S
SUITE 950
` s%j Kimley* Horn
2d'••'"'•
FORT WORTH,TEXAS 76102 801 Cherry Street,Unit 11.0 950 Tel.No.(817)335-6511
PH. 817-335-6511 Fort Worth,Texas 76102 FIRM N 10194040 www.kirnley-honnzom
ral yawn Checked by e e Proied N4he
paul.ward@kimley-hom.com �$ � A FCN JPW 0411IN20111 061171083 1OF2
WARD,PAUL 4118/2018 12:42 PM K:WTW S 061171083-WAATERSIDE LOT 1 BLOCK O1DWG\061171083 WATERSIDE DRAINAGE EASEMENT BLOCK 0 2.DWG
0 30 60
PORTION OF PHASE 3, I
NORTH GRAPHIC SCALE 9r FEET TRACT 1 I
15.131 ACRES TO FW
WATERSIDE LAND LLC
PORTION OF PHASE 3, COUNTY CLERK
TRACT 1 DOCUMENT NO.214224895 Q
15.131 ACRES TO FW OPRTCT
WATERSIDE LAND LLC
COUNTY CLERK IL
DOCUMENT NO. 214224895 LOT 1, BLOCK O 5V CIRR O
OPRTCT / WATERSIDE ADDITION 'KHAN _
INSTRUMENT NO. D217101002 C�
OPRTCT
/ 5/B"CIRR
.KHA. I
W
IJ
m
20'WIDE ACCESS PATHWAY Q
LINE TABLE
DRAINAGE EASEMENT
0.0169 OF AN ACRE NO. BEARING LENGTH
738 SQ. FT. L1 N00003'35"E 27.17 Q
L2 S89'56'2WE 27.17" I ❑
P.O.B. ? �+ L3 S00°03'35'W 27.17 I
5/8"CIRR � P.0.C. f�J LA N89°58'25"W 27.17'
'KHAN �$ t-. L4 L5 N75'05'06"W 168.93' Z
® _ +J _
to L6 S75'05'06"E 27.09'
vi
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°
O w LOT 2-R-1,BLOCK 4 �y
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0 0 FOURTH FILING
U VOLUME 388-154,PAGE 98 "XN FOUND
DRTCT
LOT 1-R-2-R,BLOCK 4 518"CIRR
COUNTRY DAY MEADOWS, 'MAN
I FOURTH FILING
VOLUME 388-213,PAGE 24
I DRTCT
I
Drainage Easement
LEGEND SHOWING A PART OF
P.O.B.=POINT OF BEGINNING LOT 1, Block O
CIRR=CAPPED IRON ROD RECOVERED W/"KHA"CAP WATERSIDE ADDITION
IRF=IRON ROD FOUND City of Fort worth, Tarrant County, Texas
OPRTCT=OFFICIAL PUBLIC RECORDS TARRANT COUNTY,TEXAS
PRTCT=PLAT RECORDS TARRANT COUNTY,TEXAS
DRTCT=DEED RECORDS TARRANT COUNTY,TEXAS
Kiml e >>> Horn
NOTES
801 Cherry Street.Unit 11.M 950 Tei.M.(817)335.6511
Fon Worth,Texas 76102 FIRM p 10194040 www.kimley-hom com
Bearing system based on the Texas Coordinate System of 1983, s_�e I Drown by I Checked by DateProject No, sheet No
North Central Zone(4202),North American Datum of 1983. r=wFCN JPW 04118no18 061171083 2 OF 2
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EXHIBIT B
This exhibit specifies design and maintenance standards for a structural water quality
device (WQ device) located below ground as part of the storm drain network when
installed as a part of a development requiring a Stormwater Facilities Maintenance
Agreement. The requirements below are in addition to all applicable City's iSWM
requirements, City's standard construction plans and specifications, and should be made
part of the Stormwater Facilities Maintenance Agreement obligating the property owner to
maintain the unit as described in the City's iSWM Criteria Manual, Section 5.5. Additional
guidance for WQ devices can be obtained from the NCTCOG iSWM Technical Manual,
Site Development Controls chapter.
1). The WQ device will need to be certified as meeting applicable City or Tarrant Regional
Water District (TRWD)water quality performance specifications and will require approval
by the TRWD. Certifications will be accepted from the Technology Acceptance
Reciprocity Partnership (TARP), Technology Assessment Protocol Ecology (TAPE), or
other third party testing services to the satisfaction of the SWM/TPW City of Fort Worth.
2). The engineer shall provide the City spreadsheets and/or output from specialized
vendor software used to calculate water quality treatment discharges.
3). The engineer shall provide the City electronic CAD (or equivalent) shop drawings of
the WQ device.
4). The lowest depth of BMP invert from ground surface shall be no more than 25 feet.
Deeper units will require prior approval from the City to ensure that the unit is realistically
maintainable by the property owner.
5). Clean out ports and manholes should be designed to allow manual confined space
entry within the unit, and should have a minimum inner diameter manhole opening of 30
inches. Manholes shall be constructed to City's 33 49 10-D412 specification.
6). The WQ device itself plus an additional 10 feet perimeter buffer around the WQ device
shall be shown as permanent private drainage easement. Additional access for
maintenance equipment shall be provided from public Right-of-Way point of entry. WQ
devices requiring vactor trucks must have a 20 feet wide access pathway. The City's
SWM Department should be consulted for easement requirements if other type of
equipment will be used by the property owner to maintain the device.
7). The engineer shall provide special structural designs and sealed report for dimensions
and depths exceeding City's standard specifications as follows:
Box sections exceeding 60";
wall penetrations exceeding 36" for 4' square boxes, 48" for 5' square boxes, and
60"for 6' and above square boxes;
Any part of the BMP exceeding 20' below ground.
8). Engineer shall provide the Operations & Maintenance manual which includes how the
unit operates, frequency of inspection and removal of captured debris. Forms for required
maintenance from the manufacturer shall be attached to this agreement as Exhibit D.
9). Recommend that the property owner acquire a 2 year warranty on the device.
STORMWATER FACILITY MAINTENANCE AGREEMENT 8 ^v\
Rev.12/29/2014 \�'
APPENDIX A,
CALCULATIONS
I�
I
EXHIBIT B
Tarrant Regional Water district � 9��,9
Stormwater Quality Site Development Review Tool u
INPUT FIELDS:
Data Ently
Drainage Area Name Stam Line F Drop Down Be.
Impervious Area
Acres Land Use% IMPervwus A- Base Load`
Drainage Area Land Cover(acres) E%islfhg Tto,a d Fmpervfous E)O-^g F"."d TSS(1bJocW TP(1W g1yr) TN(rW aiyt) E,a.Y(Wadyr} Poatables(7WaNyrJ
Vacant 1.97 0.50 5% 0.10 0_n3 16.01 0.10 0.54 6.75E+09 12.86
M.WFamily 0.00 0.00 65% 0.00 0.00 229.10 0.99 5.85 1.7E+11 1931
Roadway 0.0C 0.00 90% 0.00 0.00 507.56 1.22 12,42 8.6E+11 24.41
Camme W 0.00 !.A7 85% 0.00 1.25 223.96 0.78 8.71 1.1E+11 26.57
Total(acresf 1,97 1.97 0.10 1.28
percent rmpervjovs S% 65%
bused on preliminary modeling results,subject to change
Runoff Calculations
Parameter ,itlst§lg Fregnsed Notes'
Time of Concentration,t,..(he,,,) 0.25 0.17 Nota:guidvnce providedin!SWM Hydrology Technical Menual Seto-1.2.4(pege 10-8)
Curve Number,CN 73.73 94.17
Initial Abstraction,la 0.71 0.12
Ia/P 0.48 0.08
Unit peak discharge,a,;(cfs/mi'/inj 350 850 •Nctc:guidance provided in 1SWM?!ydrology Technical Manual Frg-1.10 jpuye M0-27)
Volumetric Runoff Coefficient,R„ 0.10 0.63
Water Quality Protection volume,0,,,(Inches) 0.14 0.95
Water Quality P rotection Valu me,G_(acre-ft) 0.02 D.16
Water Quality Peak FIOW,Q„o(ch) 0.15 1 2.49
EXHIBIT B
SECTION ( )
STORM WATER TREATMENT DEVICE
1.0 GENERAL
1.1 This item shall govern the furnishing and installation of the VortSentry HS® by Contech
Engineered Solutions LLC, complete and operable as shown and as specified herein, in
accordance with the requirements of the plans and contract documents.
1.2 The Contractor shall furnish all labor, equipment and materials necessary to install the storm
water treatment device(s) (SWTD) and appurtenances specified in the Drawings and these
specifications.
1.3 The manufacturer of the SWTD shall be one that is regularly engaged in the engineering design
and production of systems deployed for the treatment of storm water runoff for at least five
(5) years and which have a history of successful production, acceptable to the Engineer. In
accordance with the Drawings, the SWTD(s) shall be a VortSentry HS® device manufactured
by:
Contech Engineered Solutions LLC
9025 Centre Pointe Drive
West Chester, OH,45069
Tel: 1 800 338 1122
1.4 Related Sections
1.4.1 Section 02240: Dewatering
1.4.2 Section 02260: Excavation Support and Protection
1.4.3 Section 02315: Excavation and Fill
1.4.4 Section 02340: Soil Stabilization
1.5 All components shall be subject to inspection by the engineer at the place of manufacture
and/or installation. All components are subject to being rejected or identified for repair if the
quality of materials and manufacturing do not comply with the requirements of this
specification. Components which have been identified as defective may be subject for repair
where final acceptance of the component is contingent on the discretion of the Engineer.
1.6 The manufacturer shall guarantee the SWTD components against all manufacturer originated
defects in materials or workmanship for a period of twelve (12) months from the date the
components are delivered to the owner for installation. The manufacturer shall upon its
determination repair, correct or replace any manufacturer originated defects advised in
writing to the manufacturer within the referenced warranty period. The use of SWTD
components shall be limited to the application for which it was specifically designed.
1.7 The SWTD manufacturer shall submit to the Engineer of Record a "Manufacturer's
Performance Certification" certifying that each SWTD is capable of achieving the specified
removal efficiencies listed in these specifications. The certification shall be supported by
independent third-party research
1
EXHIBIT B
1.8 No product substitutions shall be accepted unless submitted 10 days prior to project bid date,
or as directed by the Engineer of Record. Submissions for substitutions require review and
approval by the Engineer of Record, for hydraulic performance, impact to project designs,
equivalent treatment performance, and any required project plan and report
(hydrology/hydraulic, water quality, stormwater pollution) modifications that would be
required by the approving jurisdictions/agencies. Contractor to coordinate with the Engineer
of Record any applicable modifications to the project estimates of cost, bonding amount
determinations, plan check fees for changes to approved documents, and/or any other
regulatory requirements resulting from the product substitution.
2.0 MATERIALS
2.1 Concrete for precast stormwater treatment systems shall conform to ASTM C857 and C478
and meet the following additional requirements
2.1.1 In all cases the wall thickness shall be no less than the minimum thickness
necessary to sustain HS20-44(MS18) loading requirements as determined by a
Licensed Professional Engineer.
2.1.2 Sections shall have tongue and groove or ship-lap joints with a butyl mastic
sealant conforming to ASTM C 990.
2.1.3 Cement shall be Type II Portland cement conforming to ASTM C 150.
2.1.4 All sections shall be cured by an approved method. Sections shall not be
shipped until the concrete has attained a compressive strength of 4,000 psi (28
MPa) or until 5 days after fabrication and/or repair, whichever is the longer.
2.1.5 Pipe openings shall be sized to accept pipes of the specified size(s) and
material(s), and shall be sealed by the Contractor with a hydraulic cement
conforming to ASTM C 595M
2.1.6 Brick or masonry used to build the manhole frame to grade shall conform to
ASTM C 32 or ASTM C 139 and shall be installed in conformance with all local
requirements.
2.1.7 Casting for manhole frames and covers shall be in accordance with ASTM A48,
CL.3513 and AASHTO M105.
2.2 Internal Components and appurtenances shall conform to the following:
2.2.1 All internal components shall be PVC per ASTM D1785, and aluminum alloy
5052-1-132 plate in accordance with ASTM B 209.
2.2.2 A bitumen sealant in conformance with ASTM C 990 shall be utilized in affixing
the aluminum bays to the concrete vault.
3.0 PERFORMANCE
3.1 The SWTD shall be capable of achieving an 80% reduction of TSS based on a treatment flow
rate or calculation as specified by local regulatory requirements unless otherwise stated.
Sizing shall be based on a particle size distribution with mean (d50) of 240 microns unless
otherwise stated.
3.2 Treatment capacity shall be additionally defined as the maximum flow rate prior to which
bypass of any flow occurs.
2
EXHIBIT B
3.3 Each stormwater treatment system shall have sediment storage and oil storage capacities
equal to or greater than that shown in Table 1 for the corresponding model as specified on
the project plans.
3.4 In order to not restrict the Owner's ability to maintain the stormwater treatment system,the
minimum dimension providing access from the ground surface to the sump chamber shall be
16 inches in diameter
4.0 EXECUTION
4.1 Each Stormwater Treatment System shall be constructed according to the sizes shown on the
Drawings and as specified herein. Install at elevations and locations shown on the Drawings
or as otherwise directed by the Engineer.
4.2 Place the precast base unit on a granular subbase of minimum thickness of six inches (152
mm) after compaction or of greater thickness and compaction if specified elsewhere. The
granular subbase shall be checked for level prior to setting and the precast base section of
the trap shall be checked for level at all four corners after it is set. If the slope from any corner
to any other corner exceeds 0.5%the base section shall be removed and the granular subbase
material re-leveled.
4.3 Prior to setting subsequent sections place bitumen sealant in conformance with ASTM C 990-
91 along the construction joint in the section that is already in place.
4.4 After setting the precast roof section of the stormwater treatment system, set precast
concrete manhole riser sections,to the height required to bring the cast iron manhole covers
to grade, so that the sections are vertical and in true alignment with a %-inch (6 mm)
maximum tolerance allowed. Backfill in a careful manner, bringing the fill up in 6-inch (152
mm) lifts on all sides and compacting the granular bedding to 95% Standard Procter Density
per ASTM D698. If leaks appear, clean the inside joints and caulk with lead wool to the
satisfaction of the Engineer. Precast sections shall be set in a manner that will result in a
watertight joint. In all instances, installation of Stormwater Treatment Systems shall conform
to ASTM specification C 891 "Standard Practice for Installation of Underground Precast Utility
Structures".
4.5 Holes made in the concrete sections for handling or other purposes shall be plugged with a
nonshrink grout or by using grout in combination with concrete plugs.
4.6 Where holes must be cut in the precast sections to accommodate pipes, do all cutting before
setting the sections in place to prevent any subsequent jarring which may loosen the mortar
joints. The Contractor shall make all pipe connections.
3 �\�I
TABLE 1 EXHIBIT B
Stormwater Treatment Device
Storage Capacities
Vortechs Model Minimum Sump Storage Oil Storage
Capacity(yd3)/(m3) Capacity(gal)/(L)
HS36 0.5(0.4) 75(285)
HS48 0.9(0.7) 137(519)
HS60 1.5(1.1) 214 810
HS72 2.1(1.6) 308(1167)
HS84 2.8(2.1) 412(1560)
HS96 3.7(2.8) 544(2060)
END OF SECTION
4
A PPENMX B
SHOP DRA kNINGS
t
EXHIBIT B
VORTSENTRY HS DESIGN NOTES
VH RATED TREATMENT CAPACF'Y IS SHOWN N THE TABLE BE'_OW,ORPERLOCA'-REGU-ATIONLS MAXMUM':IYDRAULOINFERNAIBYPASS
CAPACITY VARIES.CONTACT YOUR CONTECH REPRESENTATIVE FOR ADRENAL INFORMATON
I HF S I AWARD SOLD COVER CONT IG'J RAT DN IS SHOWN AI TFRNATF.COW CHR.GTNSART AVAEAR:.FA RF LLSTOP BELOW.
ALD NINUM TI—GH CONFIGURATION OPTION DESCRIPTION
GRATE NLET(NO NLET PPE)
GRATE IFLETWFH DIET PIPE
A A
VORTSENTRY HS GENERAL INFORMATION
Fl0W DYp T t�l
Typ..l Typ el Depth Appraxlmate
1 + 11Moee1 Manhole T Ttment DIST--
O." D 1 eRm B.1.1-0 N 'mun MAX—P'pe
Diameter nU) to IH-rt (N—) DNtence Rv Diameter ND)
Flow Rale Bottom
A B „ to Inver
°
FI a,m crs L;s FT R. Fr n, P) — FI m w Tr,
H336 S 9DC 095 ISN *10-1 150
10.,6 3t0 40B 1.2A i59 t]0218)LEAD EO BAFF.E HS48 4 1200 ,.2C 34B ^,125 401 6.G0 LIO 6]5 205] 2e6C0PLAN VIEW 6-B 1.BB ].99 —1 760
SOLD COVER OR HS72 6 1800 3]0 IIAB 1556 5.05 6]5 209 0.15 2]88 000GRATE TTOWET H9B4 ] 2,C0 59C 1580 1895 5.75 ].]5 2:19 10.35 3158 42O 1 NCTOR TO PI—ILLCUNTRACTORTOGROUASE GR O NGS/RGEkSFINISHECRADE IITH40228.1 20.87 636 650 259 11.59 3516 90 12C0
SITE SPECIFIC
DATA REQUIREMENTS
STRUCU.ED
WATER QUALITY FLOYV RATE CFSj
F] I PEAK FLOW RATE I119)
B B B CITE99II.�.� nL�I
YF1 u L ',,. RETURNPERIOD OF PEAK FLOW(YRS) '
f-Y IPE ° OUTLET PIPE I PPE DATA: tE M TFRNL DIA-11(DXX°MAX) (0%X"MAX) ) n r� INLET PPE, -
JL
ry xn OUTLET PIPE "
♦ RM ELEVATION
3 ❑ A FFLOTATON BALLAST HEIGHT
r Ni W ICTH
FRAME AND COVER FRAME AND GRATE NG'Es,svecIAL HeoulRemeN)a
(DIAMETER VARIES) (24"SQUARE)
N.T.S. N.T.S. -PER ENG INLLR OF RECORD
',. GENERAL NOTES
G L CONTEC TO PROVIDE ALL MATERIALS JN'-ESS NOTED OTHERWISE
2 DIMENSIONS MARKED WFFQARE REFERENCE DIMENSIONS.ACTUALDMENSIONSMAYVARY.
3 FOR FABRDATION DRAWINGS W FH CETALED STRJCTURE DENISIONS AND WEIGHT.PLEASE CONTACT YOUR
_ CONRECHENOIWEFEDSOLJTbi LLCREPRESENRATNE.v.w.CoT-E—
A.VOR TSEMRYHSWATEROUALRYSTRJCTL'RESHALLBEINACCORDAf WFHALLDESGNDATAANDNFCRMATION
CON AFEDNTIIEDRAW-
5 STRUCTURE SI TALL MEET AASHTO HS20 AND CASTNOS SHALL MEET PASHTO M300 LOAD RATING.ASSUMING
GROUNDWATER ELEVATION AT.OR BELOW,THE OUTLET PPE INVERT EL—INONL ENGINEER OF RECORD TO
CONFIRM ACTUAL GROUNDWATER ELEVATION
1.�� MSTALIATDN NDTE3
z w
SJ8-BASE—NF0. UFPIH AN)O NNF(.0 AIONI RD-TONS ARE SITESPECPC DESGN CONSCERATONS
CO HFASHAL BE SPE IFF EQUIPMNE ENT
O HSCF
2 DNTrRA OR TO PROVIDE ECUPMCNT RH SUFFOIENf LIFTNG AND RCPG-.CAPACITY TO LFT AND SET TILE
-1\ YRYH _STRU UF�IIiFTNG LLUT(:IIES PHOV 6JLI:p
3 CONTCACTOIE TO INSTALL.—BEALAM 6EPNEENA1l STRUCTURE BECTONS AIJI AESEMRIE STRUCTURE.
9.CONFRACIORTOPROVIDE,NSTAI.'�.,ANRCROUTPPFS.MATCHPPEINJER'SHELEVATIOSHOWNI
_ SECTION A-A s.coMrRACTORTOTAREAPPRornIATENEAsuRESTOASSUREJNFSWATERTcHT'WITNS
.HOLDING WATER To r_oWLNE
FMERT,V.NMUM.IT IS ESTED THAT ALL JONTS BELOW PPE INVERTS ARE GROU`ED.
CONTEGFI'
VortSentry' ENOWEEIED AoLUTio 0 LLCVORTSENTRY HS
AES=PF STANDARD DETAIL
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ORMNAGE AREA TABLE
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FOR',EFERENCE ONLY.
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GRADING,RRAINAGE.I STRECT LEGEND
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Exhibit "C"
CITY OF FORT WORTH STORMWATER FACILITY
OPERATION , MAINTENANCE & INSPECTION PLAN
The only responsibility the City of Fort Worth has in the operation and
maintenance of this Facility is inspection.
General Maintenance Procedures
The structural and functional integrity of the Facility shall be maintained at all
times by following the manufacturer recommendations for maintaining the system,
or once every 6 months, whichever is of the shorter duration. Disposal of litter,
sediment, and debris shall be in accordance with federal, state and local
regulations.
PREVENTIVE MAINTENANCE/INSPECTION
• Visual inspections of all components will be conducted at frequency
specified by manufacturer and documented in the manufacturer supplied or
City's inspection form (Exhibit C)
• The inspection form shall document the condition of the Facility's
components, Inspections for each water quality device shall be performed
using the form below, or equivalent from the manufacturer of the device. If
performing inspections using manufacturer's inspection list, attach to
Exhibit C.
Written maintenance and repair records shall be maintained by the party or
parties signing the attached Agreement and shall be provided to the City
annually Inspection forms shall be sent to the following:
Storm Water Division,
Transportation & Public Works Department,
City of Fort Worth
1000 Throckmorton Street,
Fort Worth, TX 76103
STORMWATER FACILITY MAINTENANCE AGREEMENT 9
Rev.12/29/2014
Water Quality Device Name: Vendor&Model: Date Inspected:
Location: Weather Conditions:
Inspected By:
Inspection Time: (Regular Time/Hours) (Over Time/Hours)
Vehicle ID/#:
Inspection Mileage: (Starting) (Ending) (Total)
Circle one per question
Manhole Lid Work Order Required? Yes No NA Comment:
1. Manhole Base Work Order Required? Yes No NA
Comment•
2. Obvious Damage to BMP? Yes No NA Comment:
3. Percentage of Debris`? X10% 10-25% 26-50% 51-75% 76-100%
Comment:
4. Offensive Oder Present? Yes No NA Comment:
5. Mosquito Larvae Present?Yes No NA Comment:
6. Oil Sheen Present? Yes No NA Comment:
7, Cleaning Work Order Required? Yes No NA
Comment:
8. Water Clarity?Clear Brown Green Black Gray Comment:
Utility Fee Credit? Yes No NA Comment:
Additional repair or maintenance comments:
STORMWATER FACILITY MAINTENANCE AGREEMENT 10
Rev.12/29/2014
Exhibit "D"
[City Approved Maintenance Specifications from Manfacturer of Water Quality
Device].
STORMWATER FACILITY MAINTENANCE AGREEMENT 11
Rev.12/29/2014
0-54w% NTECHI
ENGINEERED SOLUTIONS
VortSentry° HS Maintenance Guide
�r-
r
�' I y
m
VortSentry HS Maintenance
The VortSentry HS system should be inspected at regular intervals Cleaning
and maintained when necessary to ensure optimum performance. Cleaning of the VortSentry HS should be done during dry weather
The rate at which the system collects pollutants will depend more conditions when no flow is entering the system.Cleanout of the
heavily on site activities than the size of the unit, i.e., unstable VortSentry HS with a vacuum truck is generally the most effective
soils or heavy winter sanding will cause the treatment chamber to and convenient method of excavating pollutants from the system.
fill more quickly, but regular sweeping will slow accumulation. Simply remove the manhole cover and insert the vacuum hose
into the sump.All pollutants can be removed from this one access
Inspection point from the surface with no requirements for Confined Space
Inspection is the key to effective maintenance and is easily Entry.
performed. Pollutant deposition and transport may vary from
year to year and regular inspections will help ensure that the In installations where the risk of petroleum spills is small,liquid
system is cleaned out at the appropriate time. At a minimum, contaminants may not accumulate as quickly as sediment.
inspections should be performed twice per year(i.e. spring and However,an oil or gasoline spill should be cleaned out
fall)however more frequent inspections may be necessary in immediately. Motor oil and other hydrocarbons that accumulate
equipment washdown areas and in climates where winter sanding on a more routine basis should be removed when an appreciable
operations may lead to rapid accumulations of a large volume layer has been captured.To remove these pollutants, it may be
of sediment. It is useful and often required as part of a permit preferable to use adsorbent pads,which solidify the oils.These
to keep a record of each inspection.A simple inspection and are usually much easier to remove from the unit individually,and
maintenance log form for doing so is available for download at less expensive to dispose than the oil/water emulsion that may be
www.contechstormwater.com. created by vacuuming the oily layer. Floating trash can be netted
out if you wish to separate it from the other pollutants.
The VortSentry HS should be cleaned when the sediment has
accumulated to a depth of two feet in the treatment chamber. Manhole covers should be securely seated following cleaning
This determination can be made by taking two measurements activities to prevent leakage of runoff into the system from above
with a stadia rod or similar measuring device;one measurement and also to ensure proper safety precautions. If anyone physically
from the manhole opening to the top of the sediment pile and enters the unit,Confined Space Entry procedures need to be
the other from the manhole opening to the water surface. If the followed.
difference between these measurements is less than the distance
given in Table 1,the VortSentry HS should be maintained to Disposal of all material removed from the VortSentry HS should
ensure effective treatment. be done is accordance with local regulations. In many locations,
disposal of evacuated sediments may be handled in the same
manner as disposal of sediments removed from catch basins or
deep sump manholes.Check your local regulations for specific
requirements on disposal.
Distance Between
Water Surface and
VortSentry HS Diameter Sediment Storage Oil Spill Storage
.• of Storage
..-
Sumin m ft • m yd3 m3 gal liter
HS36 36 0.9 3.6 1.1 0.5 0.4 83 314
HS48 48 1.2 4.7 1.4 0.9 0.7 158 598
HS60 60 1.5 6 1.8 1.5 1.1 258 978
HS72 72 1.8 7.1 2.2 2.1 1.6 372 1409
HS84 84 2.1 8.4 2.6 2.9 2.2 649 2458
HS96 96 2.4 9.5 2.9 3.7 2.8 845 3199
Table 1:VortSentry HS Maintenance Indicators and Sediment Storage Capacities.
VortSentry HS InspectioniMaintenance Log
VortSentry HS Model: Location:
Describe
Water depth Floatable layer Maintenance
Date maintenance Comments
to shipment' thickness' Personnel
performed
I
I
i
I
I
i
1. The water depth to sediment is determined by taking two measurements with a stadia rod:one measurement from the manhole opening to the
top of the sediment pile and the other from the manhole opening to the water surface. If the difference between these measurements is less
than the distance given in Table 1,the system should be cleaned out. Note:To avoid underestimating the volume of sediment in the chamber,the
measuring device must be carefully lowered to the top of the sediment pile.
2. For optimum performance,the system should be cleaned out when the floating hydrocarbon layer accumulates to an appreciable thickness. In
the event of an oil spill,the system should be cleaned immediately.
EXHIBIT "E"
FW Waterside Land, LLC will own, operate, and maintain the Stormwater quality units
under this agreement for the life of the stormwater quality units or until this agreement is
assigned to another party. Upon assigning this agreement, all maintenance responsibilities
and obligations to the City of Fort Worth and to Tarrant County Water District will be
transferred to the assignee.
STORMWATER FACILITY MAINTENANCE AGREEMENT 12
Rev.12/29/2014