HomeMy WebLinkAbout2009-08-11 - Agendas a e ev le
Y WATER/SEWER COMMITTEE AGENDA
Meeting Date of August 11, 2009
COMMITTEE: Chairman Kyle Cook; Aldermen: Adella Gray, Robert Rhoads, Sarah Lewis
COPY TO: Mayor Lioneld Jordan, Sondra Smith, Don Marr, Paul Becker, Lindsley
Smith, Chris Brown, Jeremy Pate, Tom bb rd, Lynn Hyke, Shannon
Jones, Peggy Bell, OMI
FROM: David Jurgens, P. E., Utilities Director
A Fayetteville Water and Sewer Committee meeting will a hel August 11, 2009, 5:30
PM, room 326, Fayetteville City Hall, following the Agenda ession. Proposed topics
include:
1. WSIP U date.
Contract Description Contractor Cost %Complete
WL-9 Tieover- Non Critical Items Goodwin&Goodwin $ 1,546,400 90%
WL-10a Farmington Gravity Line In Town Portion Gamey Const $ 1,664,231 16.73%
WL-12 Farmington Lift Station JL Br son $ 1,703,216 100%
EL-3&5 Razorback- Happy Hollow 36/42" Gravity S J Louis Const $ 5,253,795 60%
EP-3 Noland WWTP Aeration, Clarifier Work Crossland Heavy $ 2,439,646 98.3%
BIO-1 Biosolids Solar DryingIn Desi n
BIO-2 Biosolids Thermal Drying In Desi n
Project is substantially complete, meaning the work can be used to execute its mission.
a. Biosolids Handling design is underway. Geotechnical investigations are underway in
preparation for final design.
b. EP-3 Change Order 3 in the amount of$15,084 is attached. It involves five items: (1)
installation of wafer style check valves at Aeration Basin; (2) installation of additional fittings at the
Effluent Pump Station; (3) additional joint repair at aeration basin; (4) repair of the aeration basin's
floor slab; and (5) programming the adjustable frequency drive. The project is nearly complete. This
change order also reconciles work to date, and will likely serve as the final change order.
c. WL-9 Change Order 3 for approximately $29,600 will be distributed soon. It involves
project reconciliation and completing small miscellaneous tasks required to finalize west side
collection system work.
d. WSIP Construction Schedule & Cost Update will be distributed at meeting.
2. Highway 265 Water/Sewer Relocations and 36" Water Line design work is being executed by
McClelland Consulting Engineers. The contract for the first phase was awarded to Seven Valleys
Construction for $1,757,232.00. This includes the installation of approximately 4,462 feet of 36-inch
water main on Township between Crossover Road and Old Wire Road. The Notice to Proceed was
issued on August 10; construction is expected to be completed by year end. Bond funds have been
acquired for the project. The second phase of the project, 24" - 36" water line from Mission to Joyce
along Highway 265 is nearing final design. Easement acquisition will commence as soon as the
Highway Department has acquired their right-of-way.
3. Sanitary Sewer Rehabilitation Proiect Update.
a. Minisystems 5, 6, 13A, 20 and 32 sanitary sewer evaluation study (SSES) flow
monitoring, inspecting approximately 810 manholes and 175,000 feet of sewer mains preliminary
report is completed. The work identified within this report was submitted for stimulus funding
approval as well as for 2009 STAG funding. Staff has reviewed the final report and is working on a
preliminary schedule to execute the work.
b. Insituform Sewer Pipe Lining Term Contract 2009 work has been designed. The
maintenance work is being combined with work identified in the SSES completed earlier this year.
The CIPP process involves lining existing sewer pipes with a new pipe that saves digging, costs less
W&S committee agenda 11 Aug09
a e ev le
Y WATER/SEWER COMMITTEE AGENDA
than traditional dig and replace work, and essentially installs a new water tight pipe within the
existing pipeline. Under this work order, approximately 17,000' of pipe will essentially be replaced.
4. Canterbury Water Tank, pump station and lines are being designed by McClelland Engineers.
All actions relating to the lot purchase are completed. Bid documents are expected to be completed
this fall, and a construction contract awarded by year end. Elevated water tanks generally take
approximately one year to construct. The design and construction of the offsite pump station and
additional water line improvements necessary to connect the pump station to the new water tank will
be ready before the tank completion.
5. Backflow Prevention Ordinance is attached reflecting final input received from the Arkansas
Department of Health last week. This did not result in any substantive changes in the Ordinance,
which was reviewed several years ago by the Ordinance Review Committee. Significant updates to
the current Ordinance make a paragraph by paragraph comparison functionally impossible. The
ordinance was presented to the Ordinance Review Committee and this committee last year. As
defined at www.watereuse.om, backflow prevention is the prevention of the flow of any foreign
liquids, gases, or substances into the distribution pipelines of a potable water supply; accomplished
by an air gap or mechanical backflow obstacle. A backflow can occur when there is a leak or other
cause of low pressure on the City's system, or if there is a temporary increase in pressure on the
customer's line (this would generally happen only in a commercial or industrial type setting). Staff
requests this item be forwarded to the full City Council for consideration.
6. Wastewater Treatment Plant Contract. RFQ planning is underway. The tentative schedule is:
Aug 14 & 21 Advertise Request for Statements of Qualifications
Aug 21 —Sept 11 Site visits by submitting firms (site visit is mandatory)
Sept 3 Pre-submittal meeting (strongly recommended, but not mandatory)
Sept 16 Open Statements of Qualification
Sept 18 Selection Committee short list firms, notify firms for interviews
Sept 22-24 Interview short listed firms(22nd), check references, visit sites
Sept 25 Select firm
Sept 25—Oct 15 Negotiate contract
Oct 16 Contract submitted for City Council agenda
Oct 27 City Council Agenda Session and Water/Sewer Committee Meeting
Nov 3 City Council Meeting
Nov— Dec Transition to new contract
Jan 1, 2010 New Contract takes full effect
A memorandum with the detailed plan will be distributed at meeting.
7. Woolsey Wet Prairie Wetlands Named The Governor's 2009 Corporate Conservationist Of
The Year Sponsored By The Arkansas Wildlife Federation. For the first time since the Arkansas
Wildlife Federation was formed in 1936, a municipality has been named the Governor's 2009
Corporate Conservationist of the Year. The City of Fayetteville is receiving the award through the
Arkansas Wildlife Federation (AWF)for the Woolsey Wet Prairie wetlands mitigation site, located on
the West Side Wastewater Treatment Facility site. The award is granted for excellence in protecting
and managing the wildlife and natural resources in Arkansas.
8. Water/Sewer Committee Meeting is planned for Tuesday, September 8, 2009, 5:30, room 326,
following the agenda session.
Attachments: 1 b. EP-3 Change Order 3
5. Backflow Prevention Ordinance
W&S committee agenda l 1Aug09
• 1 b. EP-3 CO 3
aye edle 1 of 3
AIIAN141
CONTRACT REVIEW MEMO
To: Mayor Lioneld Jordan
Thru: Don Marr, Chief of Staff
From: David Jurgens, Utilities Director tmar
Fayetteville Water and Sewer Commf tee
Date: August 7, 2009
Subject: Approval of Change Order 3 to the Construction Contract with Crossland Heavy
Contractors, for$15,084 for Noland Wastewater Treatment Plant improvements, WSIP Subproject
EP-3
RECOMMENDATION
Staff recommends approval of Change Order 3 Order to Construction Contract with Crossland
Heavy Contractors, for$15,084 for Noland Wastewater Treatment Plant improvements, WSIP
Subproject EP-3.
BACKGROUND
This project includes the installation of denitrification pumps, non-potable water pumps, final clarifier
drives, structural repairs, roofing replacement and other miscellaneous improvements at the Noland
Wastewater Treatment Plant. This is the final of four WSIP contracts to be executed at Noland. The
majority of this work could not be completed prior to the West Side WWTP becoming fully operational.
DISCUSSION
This change order for$15,084 involves five items: (1) installation of wafer style check valves at
Aeration Basin; (2) installation of additional fittings at the Effluent Pump Station; (3) additional
joint repair at aeration basin; (4) repair of the aeration basin's floor slab; and (5) programming the
adjustable frequency drive. Black and Veatch, the Engineer, recommends approval of this change
order.
The project is nearly complete. This change order also reconciles work to date, and will likely serve
as the final change order.
BUDGET IMPACT
This change order uses $15,084.00 of the remaining $190,110.60 contingency. A balance of
$175,026.60 will remain in the approved project contingency after this change order.
EP-3 CO3 CCMemo 4Aug09
1 b. EP-3 CO 3
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• CHANGE ORDER
Faye Al 1 le Project Number: EP-3
ARKANSAS Contract Title: Noland W WTP
Improvements
Change Order No 3 Date of Issuance August 3,2009
TO CONTRACTOR:Crossland Heavy Contractors.Inc. ORDINANCE NO:/RESOLUTION NO:
The Contract is changed as follows: EFFECTIVE
Item CO3-I. Installation of Wafer Style Check Valves at Aeration Basin.
Initiated by:Contractor
At the recommendation of the Contractor,a wafer style check valve was installed in lieu of the standard swing check valve shown
on the drawings. These valves were installed to allow the reuse of the existing concrete slab openings and reduce the overall
length of the denitrification pump discharge.This change results in an increase of$9,242.00 in Contract Price.This will result in
no change to the Contract Times.
Item CO3-2. Installation of Additional Fittings at Effluent Pumpin Station.
ation.
Initiated by: Contractor
Due to unforeseen conditions,an additional reducer was required for the discharge piping at the Effluent Pumping Station. In
order to have the discharge of the pump connect to the existing discharge piping at the pumping station an additional reducer was
needed. The additional cost for the fittings was$4,000. The Contractor will pay half of this additional cost.This change results
in an increase of$2,000.00 in Contract Price.This will result in no change to the Contract Times.
Item CO3-3. Additional Aeration Basin Joint Repair.
Initiated by: Contractor
Due to unforeseen conditions in the Aeration Basin,additional expansion joint repairs were required in the exterior walls of the
Aeration Basin. A total of 8 joints required additional repair. This repair included a full injection of the depth of the joint on the
interior and exterior of the expansion joint and concrete repair using corrosion resistant repair mortar on the exterior side of the
joint. This change results in an increase of$15,084.00 in Contract Price.This change represents an increase in Contract of 35
calendar days.
Item CO3-4, Aeration Basin Floor Slab Repair.
Initiated by: Owner
Due to unforeseen conditions in the Aeration Basin,concrete and waterstop repairs were required in two location on the east side
of the Aeration Basin. The original concrete surrounding two joints had broken away from the floor of the basin. These repairs
were done on a cost per linear foot basis. The cost for concrete repair is 58 dollars per linear foot and 52 dollars per linear for
waterstop repairs. A total of 150 feet of concrete repair was required and 75 feet of waterstop repair. This change results in an
increase of$12,600.00 in Contract Price.This change represents an increase in Contract of 21 calendar days.
00940 change order 3 00940- 1 Project No. 135045
SECTION 00940 - CHANGE ORDER FORM(continued) 1b. EP-3 CO 3
3 of
Item CO3-5. Adiustable Frequency Drive Programming
Initiated by:Contractor
To expedite the start up of the Effluent Pumping Station Pumps,OMI staff programmed the adjustable frequency drives for both
effluent pumps. This programming was removed from Contractor's scope of work. This change results in a decrease of$396.00
in Contract Price.This will result in no change to the Contract Times.
Not valid until signed by the Owner.
The original Contract Price was..........................................................................................................$ 2.439,646.00
Net change by previously authorized Change Orders .........................................................................$ 53,889.40
The Contract Price prior to this Change Order was ............................................................................$ 2,493,535.40
The Contract Price will be(X increased)(0 decreased)(O unchanged)by......................................$ 38,530.00
The new Contract Price including this Change Order will be.............................................................$ 2,532,065.40
The Contract Times will be(X increased)(0 decreased)(0 unchanged)by ....................................( 56 ) days
Required date of Substantial Completion as of the date of this Change Order therefore is ................ August 4 2009
NOTE: This summary does not reflect changes in the Contract Price or Contract Times which have been authorized by Work
Change Directives not incorporated in this or previous Change Orders.
ENGINEER
BY DATE
CONTRACTOR
BY DATE
I certify there is a balance otherwise unencumbered to the credit of the appropriation to which the above amount is chargeable,
and a cash balance otherwise unencumbered in the treasury to the credit of the fund from which payment is to be made, each
sufficient to meet the above obligation.
Distribution: 0 Owner(3)
O Contractor
0 Engineer
00940-CHANGE,ORDER FORM 00940-2
5.Backflow Prevention Ordinance
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51.146 Cross Connection Control
And Backflow Prevention (3) Approved assembly means an
assembly approved by the Water and
(A)Purposes. Sewer Division and shall mean an
assembly that has been manufactured
The purposes of this article are to: in full conformance with the standards
established by the American Water
(1) Protect the City of Fayetteville potable Works Association's most recent revised
water system from contamination or publication "Standards for Reduced
pollution by preventing contaminants Pressure Principle and Double Check
and pollutants within the water systems Valve Backflow Prevention Assemblies",
of customers from entering the City and have met completely the laboratory
water system. and field performance specifications of
the Foundation for Cross-Connection
(2) Provide for the maintenance of a Control and Hydraulic Research
continuing program of Cross Connection (FCCCHR)of the University of Southern
Control by requiring the installation of California established by specifications
approved backflow prevention of backflow prevention assemblies of
assemblies as required by the Arkansas the most current issue of the "Manual of
State Plumbing Code and requiring the Cross-Connection Control", or such
certification and operational testing of all other third party certifying entity
testable backflow prevention approved by the Water and Sewer
assemblies. Division.
(3) Comply with applicable Federal (4) Auxiliary water supply means any water
regulations related to cross-connections supply on or available to a customer's
and backflow prevention, including premises from a source other than
without limitation, those of the directly through the City water supply.
Occupational Safety & Health Auxiliary water supplies include all of the
Administration and the Environmental following:
Protection Agency.
(a) Water from another public water
(4) Comply with State regulations related to system.
cross-connections and backflow (b) Water from a natural source, such
prevention, including, without limitation, spring,those of the Arkansas Department of as a well, p g, pond, river or
Health creek.
(B) Applicability. (c) Reclaimed water.
This article applies to all connections to the (d) Any water supplied by a public
City potable water system, and to all water system, including the city
installations of backflow prevention water system, that has passed
assemblies related to the City's potable through a point of delivery and is no
water system, regardless of whether the longer controlled by the public
connection or assembly is located within the water system.
city limits of Fayetteville or in the city's water (5) AWWA means American Water Works
service area, and regardless of whether the
connection or assembly is for retail, Association.
wholesale, industrial, or other customer or
user of the City potable water supply system. (6) Backflow means the reversal of flow of
water and/or mixtures of water and other
(C) Definitions. liquids, gases, or other substances from
a customer's side of the service
(1) Air gap separation means a physical connection into the City water system.
separation between the free flowing Backflow may occur under either a
discharge end of a City water system backpressure or back siphon condition.
pipeline and an open or unpressurized (7) Backflow prevention assembly or
receiving line or vessel. assembly means a device or
(2) ADH means the Arkansas Department aggregation of devices designed to
of Health. prevent backflow, including reduced
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5.Backflow Prevention Ordinance
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pressure backflow assemblies, double
check valve assemblies, atmospheric (17)Cross connection means any physical
vacuum breakers, pressure vacuum connection between the City water
breaker assemblies or an air gap. system and another water system or
source, through which backflow may
(8) Backpressure means any situation occur.
where the pressure in a customer's
system is higher than in the City water (18)Customer means any person that is
system. supplied potable water by or through the
City water system, including, without
(9) Back siphon occurs when the pressure limitation, retail, wholesale and industrial
in the public water system becomes less customers and persons using a portion
than that of the customer's system due of the City water system for water
to a vacuum in the public system, transmission purposes.
(10)Building official means the person (19)Customer's system means the entire
designated as the Building Official in the plumbing system, including all pipes,
Building Safety Division. conduits, tanks, receptacles, fixtures,
equipment and appurtenances used to
(11)Bypass means a connection from the produce, convey, store or utilize potable
City side of a backflow prevention water between the point of delivery and
assembly to the customer side of the the customer's point of use.
assembly for the purpose of diverting
the water around the assembly while it (20)Division means the City of Fayetteville
is being repaired or replaced. Water and Sewer Division.
(12)Certified Testing Technician means a (21)EPA means the United States
person certified to test Backflow Environmental Protection Agency.
Assemblies/Devices by the Arkansas
Department of Health as an Assembly (22)Federal Government means United
Testing Technician(ATT). States Federal Government and the
Clean Water Act.
(13)Certified Repair Technician means a
person certified to repair Backflow (23)Hazardous contaminant means any
Assemblies/Devices by the Arkansas form of contamination that poses a
Department of Health as an Assembly health hazard with respect to the use of
Repair Technician( RT). water for drinking or other domestic
purposes.
(14)Check valve means a valve that seats
readily and completely to cease the flow (24)N.F.P.A. means National Fire Protection
of water. Association.
(15)City water system means the entire (25)Plumbing code means the most current
potable water distribution system of the version of the State of Arkansas
City and its water service area, Plumbing Code as adopted.
including, without limitation, all pipes,
facilities, valves, pumps, conduits, (26)Point of delivery means the point at
tanks, receptacles and fixtures and which water leaves the City water
appurtenances between the water system and enters a customer's system
supply source and the point of delivery, at or near the property line or the edge
used by the City to produce, convey, of an easement. When a water meter is
deliver, measure, treat or store potable installed on or near the property line or
water for public consumption or use, edge of an easement, the "point of
delivery" is the terminal end on the
(16)Contamination means the presence of discharge side of the water meter.
any foreign substance (organic,
inorganic, radiological or biological) in (27)Pollutant means a substance that
water that tends to degrade its quality so impairs the quality of water in a manner
as to constitute a hazard or impair the or to a degree that does not create a
usefulness of the water. Contamination hazard to public health, but may
includes both hazardous contaminants adversely affect the aesthetic qualities
and pollutants, of the water for domestic use.
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5.Backflow Prevention Ordinance
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(4) The Water and Sewer Division will make
(28)Potable water means water that periodic inspections to verify that proper
complies with United State records of the installation and
Environmental Protection Agency and maintenance of backflow prevention
Arkansas Department of Health rules for assemblies are maintained by
drinking water and other domestic uses. customers in accordance with this
article.
(29)Service connection means the terminal
end of a service connection from the (5) The Water and Sewer Division may
City water system, i.e., where the City refuse to initiate service, or may
loses jurisdiction and sanitary control discontinue service, to any customer
over the water at the point of delivery to that maintains an actual or potential
the customer. If a meter is installed at sanitary hazard in the customer's
the point of delivery, the "service system, or whose plumbing is
connection" means the point at which susceptible to cross connections, where
the terminal end on the discharge side the Division determines that adequate
of the water meter connects to the protection against backflow is not
customer's system. provided.
(D) Conflicts with other ordinances. (H) Authority of the Building Official.
If there is a conflict between a provision of
this article and the plumbing code or any (1) The Building Official designated is
other provision of this Code, the most responsible for enforcing all provisions
restrictive provision will apply. of the plumbing code pertaining to cross
connections, including proper
(E) Severability installation of each customer's system,
If any provision of this ordinance or the and the connection to the City water
application thereof to any person or system.
circumstances is held invalid, such
provisions or applications of these Rules and (2) The Building Official will coordinate all
Regulations which can give effect without the building permit approvals to ensure
invalid provisions or applications, and to this compliance with this article.
the provision hereto are declared to be
severable. (1) Responsibilities of the Certified Testing
Technician and the Certified Repair
(F) Repeal Technician.
All ordinance and parts of ordinances in
conflict herewith are hereby repealed. (1) Registration of testers: Each person
who wishes to perform services as a
(G) Authority of the Water and Sewer Division certified testing technician for a City
water system customer must furnish
(1) The Water and Sewer Division is evidence that the person is licensed by
responsible for enforcing the the State of Arkansas and show that the
requirements of this article with respect person has available the necessary
to connections made to the City water tools and equipment to properly test
system. backflow prevention assemblies. The
Water and Sewer Division will refuse to
(2) To ensure adequate protection in accept test results if the tester does not
individual cases, the Water and Sewer hold a current license from the State of
Division may assess and determine the Arkansas.
degree of hazard to the public potable
water system. (2) Testing equipment: The certified testing
technician must be equipped with and
(3) When the Water and Sewer Division be competent to use all the necessary
determines that a backflow prevention tools, gauges and other equipment
assembly is required for the protection necessary to properly test backflow
of the City water system,the division will prevention assemblies. The certified
require the customer, at the customer's testing and repair technician must
expense, to properly install an approved furnish the Water and Sewer Division
assembly at each service connection or with the serial number of the
hazard point. technician's test kit, and the technician's
test gauge must be tested when
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5.Backflow Prevention Ordinance
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purchased and at least annually customer's complete internal water
thereafter. The certified test technician system.
must maintain the test gauge to ± 2%
accuracy. (2) Each customer, as a condition of
receiving water service, must allow City
(3) Responsibility of certified testing Water and Sewer Department personnel
technician: When employed by a access to the customer's property to
customer, the certified testing technician inspect and survey the customer's
is responsible for the testing of the system for potential contamination and
customer's backflow prevention backflow hazards.
assembly, The technician is responsible
for the competency and accuracy of all (3) The customer, at the customer's
tests and reports performed and expense, must install, operate, test and
submitted. Test results must be maintain approved assemblies as
submitted to the Water and Sewer required by this article. After any repair
Division within 10 calendar days of or overhaul of an assembly, the
testing the device. customer must have it tested by a
certified tester to ensure it is in proper
(4) Immediate reports by certified testing operating condition. A customer must
technician: If a backflow prevention apply for and obtain a permit from the
assembly test fails, or an assembly building official for the re-piping or
malfunctions, the certified tester must relocation of a backflow prevention
immediately notify the Water and Sewer assembly. Upon completion of any such
Division and the customer by phone and work, the customer must have the
with proper test reports showing the assembly retested by a certified tester.
failure. The customer must maintain accurate
test and maintenance report forms for all
(5) Inspection and repair: Each customer tests and repairs made to backflow
must use a licensed certified repair prevention assemblies, and must
technician when repairing or overhauling provide the Water and Sewer Division
backflow, prevention assemblies. The with copies of these reports.
certified repair technician will make
reports of the repair to the customer and (K) STANDARDS AND REQUIREMENTS
the Water and Sewer Division. The
certified repair technician must include (1) The ADH Rules and Regulations for
in the report a list of materials or Public Water Systems, as amended
replacement parts used. The certified from time to time,will govern the design,
repair technician must ensure that parts construction, operation and
recommended by the manufacturer of maintenance of the City water system
the assembly or device being repaired with respect to cross-connection control
are used in the repair or replacement of and backflow prevention. Each
parts in the assembly or device. After customer must comply with all
the repair test results must be submitted applicable provisions of these Rules and
by the licensed repair technician to the Regulations.
Water and Sewer Division within 10
calendar days of testing the device. (2) It is unlawful for a customer to cause or
allow water from an auxiliary water
(6) Procedure and equipment: It is unlawful supply to enter the City water system.
for a certified repair technician to
change the design, material, or (3) It is unlawful for a person to make a
operational characteristics of a backflow connection from the City water system
prevention assembly during repair or to a customer's system where an actual
maintenance, or potential contamination hazard to the
City water system exists. An air gap or
(J) Responsibilities of Customers. approved backflow, protection device
must be installed at the service
(1) Each customer has the primary connection between the drinking water
responsibility of preventing supply and the source of potential
contaminants from entering the contamination.
customer's system or the City water
system. This responsibility starts at the (4) It is unlawful for a person to make any
point of delivery, and includes the connection from the City water system
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5.Backflow Prevention Ordinance
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to any condensing, cooling or industrial (1) Air gap separation. An air gap
process or any other system of installation separating the city water
nonpotable usage over which City water system from the customer's system is
system officials do not have sanitary acceptable in all situations listed in this
control, in a manner that does not fully article as long as it is properly
comply with the requirements of maintained. Since air gap installation
subsection (3) above. It is unlawful for separations are easily eliminated or
any person to cause or permit backflow bypassed, the Water and Sewer
from any such process to the City water Division may perform field surveys and
system. require the additional protection of a
mechanical backflow prevention
(5) All backflow prevention assemblies must assembly. The air gap separation must
be tested upon installation by a certified be located as close as practical to the
tester and must be certified to be city water meter, and normally all piping
operating within specifications. Backflow between the meter and the receiving
prevention assemblies which are tank must be entirely visible. The term
installed to provide protection against air gap shall mean a physical separation
hazardous contaminants must be tested between the free flowing discharge end
and certified to be operating within of a potable water supply pipeline and
specifications at least annually by a an open or non-pressure receiving
certified tester. vessel. An approved air-gap separation
must be at least double the diameter of
(6) Gauges used in the testing of backflow the supply pipe measured vertically
prevention assemblies must be tested above the overflow rim of the vessel, but
for accuracy annually in accordance in no case less than one inch(2.54 cm).
with the American Water Works
Association Manual of Cross- (2) Check valve. Each check valve must be
Connection Control. Each certified tester carefully machined to save free moving
that performs tests related to the City parts and assure water tightness,
water system must include test gauge permitting no leakage in a direction
serial numbers on all test and reverse to the normal flow. The valve
maintenance report forms to verify that must be weighted or spring loaded to
the tester uses gauges tested for one pound per square inch in the
accuracy. direction of the flow. The face of the
closure element and valve seat must be
(7) Within 10 days a test report must be of bronze composition or other
completed by a recognized backflow noncorrodible material which will seat
prevention assembly tester for each tightly under all prevailing conditions of
assembly tested. The signed and dated field use. Pins and bushings must be of
original must be submitted to the City for bronze or other noncorrodible,
record keeping purposes. nonsticking material, machined for easy,
dependable operation. The closure
(8) The use of a backflow prevention element, normally referred to as a
assembly at a service connection will be clapper, must be internally weighted or
considered an additional backflow otherwise internally equipped to
prevention, and will not negate the need promote rapid and positive closure in all
for use of backflow prevention on sizes where this feature is obtainable.
internal hazards as defined by Arkansas
Plumbing Code or the Department of (3) Double check valve backflow prevention
Health assembly. (DC) This is a device
composed of two independently acting,
(9) It is unlawful for a customer to install, or approved check valves, including tightly
to cause or permit the installation of, a closing resilient-seated shutoff valves
bypass that has not been approved in located at each end of the assembly,
advance by the Water and Sewer and fitted with properly located resilient-
Division. All bypasses on backflow seated test cocks.
prevention assemblies must themselves
include provisions for backflow (4) Reduced pressure principle backflow
prevention. prevention assembly. (RP) This is a
device consisting of two independently
(L) Types of backflow prevention. acting approved check valves together
with a hydraulically operating,
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5.Backflow Prevention Ordinance
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mechanically independent pressure backflow prevention assembly to be
differential relief valve located between used in each individual case.
the check valves and at the same time
below the first check valve. These units (4) In some instances, the Water and
are located between two tightly closing Sewer Division may require a customer
resilient-seated shutoff valves and are to use total containment backflow
fitted with properly located resilient prevention to allow the backflow
seated test cocks. prevention assembly to be installed on
an internal branch line. An example of
(M) Types of backflow prevention required, this would be for a combination fire and
domestic water service from the city
(1) The degree of protection and the type of water supply. The backflow prevention
protection deemed necessary to prevent for the domestic use would be installed
backflow, and possible contamination of immediately after the fire line tee. In
the City water system are outlined in this such a case, the fire line must be
section. Cross connections vary widely provided with its own separate backflow
in degree of contamination hazard. prevention.
Backflow may occur under many
different pressure differentials, varying (5) Auxiliary water supplies: Where a
from vacuum to very high pressures. customer is served by an auxiliary water
The protection afforded by a backflow supply in addition to the City water
prevention assembly depends upon its system, all applicable regulations must
type, the circumstances in which it is be followed, and the Water and Sewer
installed, and on its proper installation, Division will determine the type of
testing and maintenance. backflow prevention assembly to be
used.
(2) Criteria for selection of backflow,
prevention assemblies: The selection of (6) Backflow,prevention for fire lines.
an appropriate backflow prevention
assembly depends upon the degree of (a) Backflow prevention is required on
hazard involved and will be based on all fire line installations. The type
the following criteria: and extent of backflow prevention
needed for a particular fire
(a) Whether or not the assembly could protection system is subject to
ever be subject to backpressure approval by the Water and Sewer
due to the customer's internal Division. Pressure losses across
pumping pressures or elevation backflow prevention assemblies
differentials. must be accommodated in the
design or redesign of a fire
(b) The nature of contaminating protection system. This factor is
material under the most critical particularly important when
circumstances. redesigning existing fire protection
systems. All backflow prevention
(c) The extent to which additions may assemblies for fire line installations
be made to the plumbing system at must be Underwriters Laboratory
a later date which would affect the listed. At no time can a fire line be
initial selection of the assembly. connected to a water meter unless
that meter is approved for that use
(d) The frequency with which the City and approved by the Water and
water supply could be exposed to a Sewer Division.
hazardous condition.
(b) Backflow, prevention requirements
(e) The degree of protection of the for fire lines: Systems with chemical
water supply as provided by the loops and/or foam injection will
plumbing code as enforced by the require a reduced pressure
Building Safety Division. principle backflow prevention
assembly at the loop or foam
(3) Decisions on selection of backflow injection point; however, an
prevention assembly: The Water and expansion chamber or relief valve
Sewer Division will have the final will have to be installed to
approval authority over the type of compensate for thermal expansion
in accordance with the fire code.
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5.Backflow Prevention Ordinance
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The installation of reduced pressure service, or assume that a high
principle assemblies for contamination hazard exists, and
containment backflow prevention on therefore require the highest degree of
fire lines should be avoided and protection on the customer's system.
installed only in situations where
chemical injection occurs prior to (0) New facilities.
any taps or tees. Existing chemical
loops and systems with access to (1) All new facilities are required to comply
an auxiliary water supply must be with the requirements of this article.
retrofitted with an approved Compliance by a new City water system
assembly. customer with the requirements for
installation of one or more backflow
(c) Backflow prevention assemblies prevention assemblies will be verified in
installed on fire lines must be tested conjunction with the customer's
in accordance with N.F.P.A. application for water service, or with the
requirements. Backflow devices customer's building and plumbing
must be tested at least annually for permits,
proper operation against
backpressure and backsiphon. (2) The Water and Sewer Division may
require field inspection of the customer's
(d) Test and maintenance report forms premises, in addition to plan submittal
for fire line backflow prevention and review, to determine the actual or
assemblies: Test and maintenance potential hazards and backflow
report forms used by fire line testers prevention assembly requirements.
must include a confirmation that the
system has been placed back in (3) All mechanical layouts or building plans
operation upon completion of a test. submitted to the Building Safety Division
Test forms must be submitted by will be reviewed to assure compliance
the certified tester to the Water and with the requirements of this article and
Sewer Division within 10 days of the plumbing code. All mechanical
testing each device. layouts or plans will be stamped by the
Water and Sewer Division to indicate
(e) Single check valve: The single that the drawings have been reviewed to
check valve is not considered to be assure compliance with the
an approved assembly, and will be requirements of this article. Further
used only in limited instances such contact by the Water and Sewer
as for directional flow control. Division may be necessary for further
determination.
(N) Procedures.
(4) A new customer's application for water
(1) The procedures outlined in this section service must be accompanied by a
are based on the principle of mechanical layout or plan for all
containment of all actual and potential proposed structures to be connected to
contamination hazards within the the City water system, showing or
customer's system. describing all plumbing arrangements
and indicating the proposed type and
(2) A customer may request in writing a size of backflow prevention assemblies
written approval from the Water and to be installed. This information will be
Sewer Division for a proposed deviation routed through the Water and Sewer
from or exception to the standards in Division to ensure compliance with the
this article. The Water and Sewer provisions of this article.
Division may approve a deviation or
exception only if it does not involve a (5) Customer service inspections: The
risk of contamination to the City water Water and Sewer Division will require a
system, customer service inspection certification
in all of the following circumstances:
(3) If a customer refuses to allow access to
Water and Sewer Division (a) Prior to providing continuous water
representatives for an inspection or a service to new construction;
water use survey, the Water and Sewer
Division may either refuse or (b) On any existing service when the
discontinue the customer's water water purveyor has reason to
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5.Backflow Prevention Ordinance
8 of
believe that cross-connections or this section. All assemblies must be
other unacceptable plumbing tested at the time of installation, and at
practices exist; and the time of any repair or relocation. All
tests and repairs must be performed by
(c) After any substantial improvement, a certified technician. The technician
alteration, correction, or addition to must complete a test and maintenance
a customer's system. report form and submit the form to the
Water and Sewer Division within 10
(P) Existing facilities, calendar days of testing a device. It will
be the responsibility of the customer to
(1) Whenever it is determined by the Water initiate the testing and any maintenance
and Sewer Division that a water service determined by the test to be necessary,
poses an actual or potential threat to the and to submit written results to the
physical properties of the water system Water and Sewer Division.
or potability of the public water system,
a device complying with this article shall (2) Time schedule: All assemblies must be
be installed by the customer and at the tested annually no later than 30 days
customer's expense. after the date of the original installation.
(2) Inspection procedure: The Water and (3) Testing by city: City personnel may
inspect the existing Perform periodic tests on assemblies at
Sewer Division will ins
p g random locations to ensure that
facilities of all City water system acceptable test standards are being
customers that pose a potential risk to followed by certified testers. City
the City water system. After the personnel may also randomly select and
inspection is completed, the Water and tag assemblies in a manner that will
Sewer Division will provide a written determine if the assemblies have been
notice to the customer advising of the tested as required.
backflow prevention assembly
requirements for the customer's system. (R) Costs.
The customer will then be required to
retrofit an assembly so that it will meet (1) All costs associated with compliance
current standards. When notified, with this article, including purchase,
customers will have 10 calendar days installation, testing, maintenance, repair
from notification to have a device and replacement are to be borne by the
installed. If, at any time, a customer is customer. Advisory assistance may be
having difficultly meeting the time requested from the Water and Sewer
requirement, the customer must contact Division and Building Safety Division
the Water and Sewer Division for an without charge.
extension of time to complete the
installation. (2) Annual fee: The Water and Sewer
Division, at the discretion of the City
(3) Building Safety - Plan review: Plans
Council, may collect an annual fee from
submitted to the Building Safety Division each account that requires a backflow
for approval of plumbing modifications, prevention assembly. The annual fees
or additions to an existing plumbing collected shall be used to offset the cost
system, will be reviewed by the Water of establishing and maintaining a record
and Sewer Division to determine the system to permit and track backflow
type of backflow prevention method or prevention assemblies and their annual
assembly required for the entire certification.
establishment. The method and type of
assembly required will be noted on the (S) Penalty; disconnection.
plans.
(1) If the Water and Sewer Division
(Q) Records and tests. discovers that a customer has not
(1) In order to assure that backFlow installed a required backflow prevention
device or that a backflow prevention
prevention assemblies continue to device has been improperly tested,
operate satisfactorily, each customer maintained, bypassed or removed, or
that is required to use an assembly is that an unprotected cross-connection
required to have periodic testing of the exists in the customers water system,
assembly performed in accordance with the water service to that service
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5.Backflow Prevention Ordinance
9 of
connection shall be disconnected if the
situation is not remedied within the time
specified in the notice sent to the
customer as required by this section.
The service shall not be restored until
the condition is remedied.
(2) Water service to a fire sprinkler system
shall not be subject to disconnection
under this section. If a situation, which
would otherwise result in discontinuance
of water service in subsection(1)above,
is not remedied within the time provided
in the notice sent to the customer, the
customer may be issued a citation each
day for a misdemeanor until the offense
is corrected. Each day the situation is
allowed to continue thereafter may
constitute a separate violation of this
section. A notice to the insurance
carrier, Department of Health and Fire
Department will be sent by the Water
and Sewer Division notifying them of the
potential hazard.
(3) Prior to disconnecting any water service
because a condition set forth in
subsection (1) above, exists, the
department shall send a notice to the
customer describing the condition and
notifying the customer that the condition
must be remedied within 10 days after
mailing of the notice by the division. If
such condition is not remedied within
said 10 calendar day period, the division
shall send a second notice to the
customer notifying the customer that
water service will be disconnected in 15
calendar days if the condition is not
remedied.
(4) The division may disconnect, without
notice, water service to any customer
when the department discovers that the
customer's water system is
contaminating the public potable water
supply. The Water Division shall
immediately attempt to notify the
customer to the problem.
(5) A person who knowingly or intentionally
violates, or causes or permits the
violation of any provision of this article
commits a misdemeanor. Each day of
an ongoing violation will be deemed a
separate violation.
(6) Failure, refusal or inability on the part of
a customer or user to comply with any
provision of this article will constitute
grounds for refusing or discontinuing
water service.
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