POLICY AND PROCEDURES
6.12(R6) (supersedes policies 6.12(R5), 6.13(R1), 6.17 and 6.18)
94-07-01 APPROVED: July 10, 1994
January 27, 2009
Summit Water & Supply By-Laws
AWWA “Cross-Connection Control Manual – Accepted Procedure
The purpose of the Summit Water and
Supply Company (Company) Cross-Connection Control program is
to protect the public water system, as defined in WAC 246-290-010, from
contamination via cross-connections.
where specifically designated herein, all words used in this procedure
shall carry their customary meanings. Words used in the present tense
include the future, and plural includes the singular: The word “shall”
is always mandatory; the word “may” denotes the Company’s use of
discretion in making a decision.
“Approved air gap” means a physical
separation between the free-flowing end of a potable water supply pipeline
and the overflow rim of an open or non-pressurized receiving vessel. To
be an air gap approved by the water company, the separation must be at
Twice the diameter of the
supply piping measured vertically from the overflow rim of the receiving
vessel, and in no case be less than one inch, when unaffected by vertical
surfaces (sidewalls); and:
Three times the diameter of
the supply piping, if the horizontal distance between the supply pipe and
a vertical surface (sidewall) is less than or equal to three times the
diameter of the supply pipe, or if the horizontal distance between the
supply pipe and intersecting vertical surfaces (sidewalls) is less than or
equal to four times the diameter of the supply pipe and in no case less
than one and one-half inches.
“Approved backflow prevention assembly”
means an RPBA, RPDA, DCVA, or DCDA of make, model, and size that is
approved by the Company and listed on the DOH approved list.
“Assessment of risk”
shall express the results of an evaluation of a potential health, system,
or plumbing hazard. The evaluation required in making a determination of
the type of backflow preventer needed to isolate a potential cross
connection (e.g., a plumbing fixture), or a group of cross connections
contained within a facility or complex of facilities (e.g., a shopping
mall) is comprised of the following steps:
Determine the degree of potential health hazard risk to the
public water system. (In assessing the purveyor’s risk of contamination
of the public water system, if knowledge of the degree of hazard posed by
a substance is not known, the purveyor must assume that it is high.
Generally, almost all substances other than potable water are considered a
health hazard of some degree).
Determine the high or low probability that a
cross-connection may occur.
probability increases that an existing cross-connection will go undetected
as the complexity of a piping system increases.
changes will create new cross-connections, or change the operating
conditions from backsiphonage to backpressure conditions.
backflow preventer could be by-passed or removed from service.
substance could be changed or increased in strength.
substance may deteriorate, and thus become a health hazard.
substance, when combined with the chemicals in the potable water supply,
or when exposed to certain piping material, may react and form a compound
that poses a health hazard, such as CO2 mixing with water to form carbolic
acid that leaches copper from a service pipe.
substance, if it contains a bacteriological contaminant, could become a
health hazard long after it enters the potable water supply, through
Determine the risk level acceptable to the purveyor, and
Determine the reliability required of the backflow preventer.
“Authority Having Jurisdiction” means the
local official, board, department, or agency authorized to administer and
enforce the provisions of the Uniform Plumbing Code as adopted under
chapter 19.27 RCW (WAC 51-46-0603).
agent” means any person whom:
Makes decisions regarding
the operation and management of a public water system whether or not he or
she is engaged in the physical operation of the system;
Makes decisions whether to
improve, expand, purchase, or sell the system; or
Has discretion over the
finances of the system.
“Backflow” means the undesirable
reversal of flow of water or other substances through a potential
cross-connection into the public water system or customer’s potable water
“Backflow assembly tester” means a
person holding a valid BAT certificate issued in accordance with chapter
“Backpressure” means a pressure
(caused by a pump, elevated tank or piping, boiler, or other means) on the
customer’s side of the service connection that is greater than the
pressure provided by the public water system and which may cause backflow.
“Backsiphonage” means backflow due
to a reduction in system pressure in the purveyor’s distribution system
and/or customer’s water system.
“Combination fire protection system”
means a fire sprinkler system that:
Is supplied only by the
Does not have a fire
department pumper connection; and
Is constructed of approved
potable water piping and materials that serve both the fire sprinkler
system and the customer’s potable water system.
“Company” means the Summit Water and Supply
Company, the General Manager of the Summit Water and Supply Company,
his/her designee or authorized agents.
“Contaminant” means a substance
present in drinking water that may adversely affect the health of the
customer or the aesthetic qualities of the water.
“Cross-Connection” means any actual or
potential physical connection between a public water system or the
customer’s water system and any source of non-potable liquid, solid, or
gas that could contaminate the potable water supply by backflow.
Cross-Connection” means a connection between the public potable
water supply system and any non-potable or unapproved water system with an
approved backflow preventer or approved Air Gap, properly installed and
maintained so that it will continuously afford the protection commensurate
with the degree of hazard.
“Cross-Connection control program”
means the administrative and technical procedures the purveyor implements
to protect the public water system from contamination via
cross-connections as required in WAC 246-290-490.
“Cross-Connection control specialist” means
a person holding a valid Washington State Cross-Connection Control
Specialist certificate issued in accordance with chapter 246-292 WAC.
“Cross-Connection control summary report”
means the annual report required by the water company that describes the
status of the purveyor’s cross-connection control program.
Inspection” means an inspection of a customer’s premise expressly for
the purposes of locating and evaluating cross-connection potential
inherent in supplying that customer’s water system.
“Customer” means the member or any
person authorized to receive water from the Company.
“Customer’s water system” as used
in WAC 246-290-490, means any potable and/or industrial water system that
begins at the public water system point of delivery; that is, at the
immediate downstream side of the water meter, and is located on the
customer’s premises. The customer’s water system includes all auxiliary
sources of supply, storage, treatment, and distribution facilities,
piping, plumbing, and fixtures under the control of the customer.
means the Washington State
Department of Health or health officer as identified in a joint plan of
operation in accordance with WAC 246‑290‑030 (1).
“Distribution system” means all piping
components of a public water system that serve to convey water from
transmission mains linked to source, storage and treatment facilities to
the customer, excluding individual services.
“DOH” means the Washington State Department of Health, Drinking
fire protection system” means a
fire sprinkler system that:
Is supplied only by the
Does not have a fire
department pumper connection;
Is constructed of approved
potable water piping and materials to which sprinkler heads are attached;
Terminates at a connection
to a toilet or other plumbing fixture to prevent the water from becoming
means the General Manager of the Summit Water and Supply Company. The
General Manager is responsible for all operations of the Summit Water and
hazard” shall mean any condition, device, or practice in a water
supply system and/or its operation that creates or may create a danger to
the health and well being of a customer.
“Health officer” means the health officer
of the city, county, city-county health department or Water Company, or an
“High health cross-connection hazard” means
a cross-connection which could potentially impair the quality of potable
water and create a public health hazard through poisoning or spread of
disease by sewage, industrial liquids or waste.
“In-premise protection” means a method of
protecting the health of customers served by the customer’s potable water
system, located within the property lines of the customer’s premises by
the installation of an approved air gap or backflow prevention assembly at
the point of hazard, which is generally a plumbing fixture.
“Low health cross-connection hazard” means
a cross-connection that could potentially cause an impairment of the
quality of potable water to a degree that does not create a hazard to the
public health, but may adversely and unreasonably affect the aesthetic
qualities of such potable waters for domestic use.
means any water supply that dose not meet Washington State Department of
Health Public Water System Rules and Regulations definition of Potable
Water” means water suitable for
drinking by the public.
means a method of protecting a public water system by installation of
approved air gaps or approved backflow prevention assemblies at or near
the service connection or alternative location acceptable to the purveyor
(at the point where the water purveyor no longer has legal jurisdiction
and/or authority to control the water system) to isolate the customer’s
water system from the purveyor’s distribution system.
“Public water system”
is defined and referenced under WAC 246-290-020.
an agency, subdivision of the state, municipal corporation, firm, company,
mutual or cooperative association, institution, partnership, or person or
other entity owning or operating a public water system. Purveyor also
means the authorized agents of such entities.
“Service connection” means a
connection to a public water system designed to provide potable water to a
single-family residence, or other residential or nonresidential
“Severe health cross-connection hazard”
means a cross-connection which could potentially impair the quality of
potable water and create a public health hazard through poisoning or
spread of disease by sewage, industrial liquids or waste.
“System hazard” shall mean a
potential threat to the physical properties of the public or the
customer’s potable water system by a material not dangerous to health but
aesthetically objectionable that may have a degrading effect on the
quality of the potable water in the system.
auxiliary water supply” means a water supply or well (other than the
purveyor’s water supply) on or available to the customer’s premises that
is either not approved for human consumption by the health agency having
jurisdiction or is not otherwise acceptable to the purveyor.
“Used water” means water which has
left the control of the purveyor.
It is the intention of this policy to
provide for the permanent abatement or control of any potential
Cross-Connections within the service area of Summit Water and Supply
Company (Company). Where it is officially, actually, and/or economically
unfeasible to find, eliminate or to permanently control all
cross-connections of the customer’s water system, and when it is mandated
by WAC 246-290-490 and/or deemed necessary by the Company cross-connection
specialist (CCS), there shall be installed at the Company’s water service
connection an approved backflow prevention assembly commensurate with the
potential degree of hazard posed by the customer’s water system upon the
public water supply. The most current version of WAC 246-290-490 shall be
the Company’s minimum standard with the following additions;
Existing Service Connection Inspection
To comply with the State of Washington,
Department of Health requirements as defined in Chapter 246-290-490 of the
WAC, the Board of Directors have determined that all existing service
connections be evaluated on a priority based on potential hazard exposure
to the water system. This shall be addressed on a "case-by-case" basis.
Commercial and industrial consumers will be evaluated in a systematic
manner, after the commercial program is developed. Residential consumers
will be evaluated over a longer period of time, with initial evaluations
based on construction activity, landscape improvements, irrigation
installations, service reactivation and observations by Company personnel
may initiate an onsite inspection to be conducted by the qualified Company
Existing residential connections
determined by the CCS to have a potential cross-connection hazard shall
have an approved premise isolation backflow assembly installed.
Failure to comply shall result in the
Company taking necessary action to protect the public water supply by
suspending service or by the installation of a backflow prevention
assembly at the customer’s expense. This backflow assembly charge shall
be added to the customer’s water bill. Failure to pay the water bill may
result in termination of water service.
Installation of Cross-Connection Assemblies
Effective March 1,
2007 the Company requires that all new connections be protected by
premises isolation. The minimum acceptable assembly is a DCVA as shown
in the Company’s standards and approved by the Manager. The assembly shall
be commensurate with the potential degree of hazard the connection may
pose. Person(s) requesting service from the Company will incur the
initial expense of the installation and testing of premises isolation
assemblies. The fees for the installation and testing shall be reviewed
annually, adjusted accordingly, and included as part of the meter install
cost for those wishing to connect to Company system. The Company will
assume the responsibility of scheduling the installation and testing of
the assemblies. This work may be performed by either Summit Water or its
Effective January 1, 2007 when existing
homes or structures served by the Company are sold or ownership
transferred the cost for installing and testing a premise isolation
backflow assembly (minimum of a DCVA) shall be added to any request for a
closing bill (escrow). The Company will assume the responsibility of
scheduling the installation and testing of the assemblies. This work may
be performed by either Summit Water or its contractor; and
The Company shall be responsible for
testing and normal maintenance of these residential premise isolation
backflow assemblies installed per this policy. The Company or its
independent Contractor shall perform the testing and normal maintenance.
Annually, the Board may review the cost
associated with testing and maintenance and adjust the Customer Fixed
Charges accordingly. Continuation of this policy and adjustments of the
rates shall be at the sole discretion of the Board.
Coordination, and delineation of
responsibilities with the AHJ
The control of Cross-Connections requires
cooperation between the Company, AHJ, the health officer and the customer.
WAC 246-290-490(1)(d): The
purveyor’s responsibility for cross-connection control shall begin at the
water supply source, include all the public water treatment, storage, and
distribution facilities, and end at the point of delivery to the
customer’s water system, which begins at the downstream end of the service
connection or water meter located on the public right-of-way or
WAC 246-290-490(1) (e):
Under the provisions of this section, purveyors are not responsible for
eliminating or controlling cross-connections within the customer’s water
system. Under chapter 19.27 RCW, the responsibility for cross-connections
within the customer’s water system, i.e., within the property lines of the
customer’s premises, falls under the jurisdiction of the AHJ.
The Company’s CCS shall make available to
the AHJ the information maintained in the Company cross-connection control
program files, which may include, but is not limited to:
A master list of all premises that have been isolated from the
Company water system in accordance with the Company Cross-Connection
control program; and
Information concerning any internal Cross-Connections that come to the
attention of the Company CCS during risk assessment evaluations of
Water and Supply Company:
The Company shall prevent the potential
contamination or pollution of the public potable water system caused by
the backflow of contaminants or pollutants through the water service
connection. If in the judgment of the Company an approved backflow
prevention assembly is required at the service connection for the safety
of the public water system, an approved air gap or approved backflow
assembly, commensurate with the potential degree of hazard, shall be
installed at the customer expense. The Company shall notify the customer
in writing of the requirement for installation of air gaps or backflow
prevention assemblies. The notice shall specify the type of backflow
protection required and the locations that the backflow protection must be
Cross Connection Specialist:
The CCS is
responsible for the operation of the Company’s Cross Connection Control
Program and is responsible for the implementation and enforcement of the
cross connection control program stated in this policy and procedure.
shall be responsible for eliminating cross connections or controlling
them through the installation, testing and maintenance of approved
backflow prevention assemblies or air gaps.
shall be responsible for providing the necessary information,
obtaining required permits and providing entry and access for the
inspection, to allow a determination of the cross connection potential
and the necessary control methods.
The customer is
responsible for notifying the Company of any assemblies that the
customer believes that are no longer required. The customer shall not
remove any backflow prevention assembly or air gap without written
permission from the Company.
The customer is responsible for all costs
associated with the installation, testing,
repair and replacement of in-premises backflow prevention assemblies or
Records and Reports:
Cross-Connection Control Program File
A computer software database will be
utilized for compiling and extracting information required for
tracking compliance as well as Department of Health annual summary
A file shall be maintained with
the cross-connection information and contain
(a) Copies of all correspondence with
customer relative to cross-connection control.
(b) Copies of evaluation reports
complete with field drawings (if applicable).
Copies of all completed backflow assembly test report forms
Copies of all reports or correspondence pertaining to enforcement
cross-connections, or backflow incidents.
The following procedures represent minimum
cross connection control operation procedures:
The control or elimination of potential
cross-connections shall be in accordance with the State of Washington
Administrative Code on Cross-Connection Control (WAC 246-290-490) and the
The polices, procedures and criteria for
determining appropriate levels of protection shall be in accordance with
WAC 246-290-490 and the “Accepted Procedure and Practice in Cross
Connection Control Manual - Pacific Northwest Section”, American Water
Works Association, Fifth (or current) Edition, with the following
The type of Backflow assembly required and
installation methods shall be as detailed in the Company’s Standards.
Type, Location of Protection, and Inspections:
Any backflow prevention assembly required
by these Administrative Rules shall be a model approved by the Company.
The Company’s required backflow prevention assembly shall also be listed
on the State of Washington Department of Health approved list.
The type of backflow protection required
shall depend on the potential degree of hazard.
A double check valve assembly (DCVA) shall
be required for all residential connections. Higher levels of protection,
i.e. AG, and/or RPBA shall be required if a Table 9 Hazard is found or as
determined by the CCS.
An air gap (AG) and/or Reduced Pressure
Backflow Assembly (RPBA) shall be required for all commercial connections
and any connections listed on Table 9 of the WAC or as determined by the
Location of Protection:
Backflow protection assembly’s installed
as Premises Isolation shall be located as close to the Company’s meter as
possible and before any taps off the service line, or as required by the
Company representatives are available to
review plans and interpret State Regulations, Company Administrative Rules
and Operating Policy and to assist water customers in meeting the cross
Inspection of Installations:
The Company shall inspect all new
installations of backflow prevention assemblies including AG’s.
The Company may inspect premises after the
removal of any assembly that is no longer needed. An assembly no longer
needed and which the site was inspected will be removed from the Company’s
Inspection of existing Service Connections:
The customer, or customer's
representative, shall be informed by letter that an onsite inspection is
necessary. Material to be addressed shall be, but not limited to;
1. Sufficient background of the
statute and the potential hazard which is to be evaluated shall be
discussed in the letter;
2. The need for an inspection to
be performed by the Company. This inspection is in addition to the
inspections performed by the appropriate Pierce County officials (Chapter
3. The inspection must occur
within a reasonable time period after the letter of notification, and the
customer advised as to the potential hazards posed to the water system.
4. The customer may be verbally
advised, and in all cases, a letter from the Company will be forwarded to
the customer summarizing the findings, and any additional action required
by the customer.
recommended procedures required to ensure that the intent of the statutes
are met shall be as follows;
1. The requirement for an
inspection shall be noted on the "cross-connection control form".
2. A letter shall be sent, and a
date and time shall be agreed upon with the customer, for the inspection.
3. The inspection performed and
the information noted on the cross-connection control form.
4. A post-inspection letter shall
be transmitted to the member (see Member notification).
5. The inspection date and status
for connection of service shall be noted on the cross-connection control
6. A follow-up contact and
inspection shall be made, after corrections, or installation of the
backflow prevention device is installed.
7. The date of approval, and
information as to the requirement and method of a backflow prevention
device shall be recorded in the membership database. The database shall
indicate when the premise was inspected.
8. If a backflow assembly is
required, the customer information shall be added to the notification list
for annual test reporting requirements for these devices.
In the event the customer does not
cooperate with Company personnel a summary paper will be prepared and the
Manager shall take the necessary action to ensure the protection of the
water system. Such action could be termination of the service connection
until the (potential) hazard is eliminated or controlled.
Temporary Water Users:
All temporary water users such as street
sweepers, Hydro excavator trucks, Hydroseeders and other water carrying
vehicles shall only use the fill point located at Canyon Rd. E. & 88th
St. Ct. E. A temporary fill permit shall be purchased at the Company’s
office prior to filling. Any trucks and/or equipment, which have been
permitted by the Company to take water from this fill point, shall be
equipped with a minimum of a certified RPBA and/or air gap.
Temporary water users approved for a water
use permit will be required to rent the Company’s meter assembly. Rental
rates and damage deposit amounts will be determined from the current fee
schedule. These meter assemblies are equipped with an RPBA and will be
tested by a BAT prior to use.
Backflow Prevention Assembly
Installation Requirements and Practices:
The criteria for assembly installation
shall be in accordance with the “Accepted Procedure and Practice in
Cross Connection Control Manual”, Sixth (or current) Edition, with the
The type of assembly and materials used
shall be as detailed or shown in the Company’s
Assemblies shall be protected against
freezing, flooding, and mechanical damage at the customer’s expense.
An approved air gap shall mean a physical
separation of at least two times the supply pipe inside diameter,
unobstructed by guards, shields, or any other coverings, measured
vertically between the end of potable water system supply pipe to the over
flow rim of the receiving vessel.
All RPBA’s shall be installed horizontally
unless approved for installation in other orientations by the Washington
State Department of Health and the Water Company
RPBA’s shall be installed with sufficient
space around the assembly to allow for testing, inspection, and repair of
the assembly without removing the assembly.
As a minimum, RPBA’s shall be installed
with minimum clearances of 6 inches in front of test cocks, check valves,
and relief valves to facilitate testing and maintenance. If an assembly is
installed in an area with limited accessibility, such as crawl spaces,
pipe chases and vaults, a minimum of 24 inches clearance shall be provided
on one side of the assembly.
RPBA’s shall be installed a minimum of 12
inches above ground level, floor level, or flood level, whichever is
RPBA’s shall be installed in a location
where the discharge from the relief valve will not be objectionable, and
shall be equipped with an air gapped drain that will reasonably handle the
nuisance discharge of water caused by any means. Additionally, a drainage
system capable of handling all water that may be discharged from the
relief valve must be provided.
Check Valve Assembly:
DCVA’s shall be installed with minimum
clearances of 6 inches in front of test cocks, check valves, and relief
valves to facilitate testing and maintenance. If an assembly is installed
in an area with limited accessibility, such as crawl spaces, pipe chases
and vaults, a minimum of 48 inches clearance shall be provided on one side
of the assembly.
DCVA’s shall be installed horizontally
unless approved for installation in other orientations by the Washington
State Department of Health and the Water Company.
DCVA’s for Premises Isolation may be
installed under ground if installed as shown in the Company’s typical
residential meter installation detail drawing; and
DCVA’s on fire sprinkler systems may be
installed under ground if installed as shown in the Company’s typical
residential fire service installation detail drawing.
Prevention Assembly Testing Requirements:
Initial and annual testing of backflow assemblies shall be
per WAC 246-290-490 (7) (d).
The Company shall be responsible for all
testing costs for residential Premises Isolation assemblies.
The owner shall be responsible for all
testing costs for in-premise backflow prevention assemblies.
Initial testing of Backflow assemblies
shall be conducted by a certified BAT.
All backflow prevention assemblies and Air
Gaps shall be inspected and tested at least annually by a BAT certified in
the State of Washington. Notification of the requirement for the testing
will be done annually by the Company to all water customers responsible
for assemblies of record. The results of the tests must be received by the
Company within 60 days of the date of notification letter.
The Company shall be responsible for the
testing and normal maintenance of residential Premises Isolation
assemblies that are installed (per this policy) near the meter and not
located within a building.
Customers required to test backflow
prevention assemblies shall be assigned an annual testing month by the
Company. The month assigned for the first annual test shall not exceed
twelve months from the date of the initial test and all backflow
prevention assemblies shall be scheduled for testing annually
If test results are not received within 30
days of initial letter of notification, a second reminder letter will be
sent requesting test reports by the suspense date listed on the first
If the test reports are not received by
the suspense date of the first letter, a registered letter will be sent
with notification of a specific date of termination of water service.
The Water Company CCS may require testing
more often or may field-verify the test results.
Testing After a Backflow Incident:
Testing is required of any assembly that
is relied upon to protect the Water Company’s public water system after a
backflow incident downstream of the backflow prevention assembly.
Testing After Repair or Replacement:
Testing is required of any assembly that
is repaired, replaced, or moved.
Assembly Tester Requirements:
The BAT must be certified by the State of
Washington Department of Health. The BAT’s test equipment must have a
current calibration report.
Company’s List of Certified Backflow Assembly Testers:
The Company will maintain a list of BAT’s
willing to test backflow assemblies in the Company’s service area.
BAT’s desiring to be on the Company’s list
of testers must submit to the Company the following:
A current copy of a Washington State
Department of Health Backflow Assembly Certification. The BAT must keep a
current copy of their certification on file with the Company;
A current report of verification of
accuracy and/or calibration of the BAT differential pressure test kits.
The differential pressure test kits must be verified for accuracy or
calibrated at least annually The BAT must keep a current copy of their
certification on file with the Company;
A current certificate of liability
insurance. A current copy of their insurance must be kept on file with the
The BAT must supply the Company a copy of
the Washington State Business License.
Backflow Assembly Test Report Form:
BAT shall complete and submit a Backflow
Assembly Test Report Form acceptable to the Company for each Backflow
Prevention Assembly tested. The Company will furnish backflow assembly
test report forms upon request.
The BAT may use other backflow assembly
test report forms acceptable to the Company. All backflow assembly test
report forms used shall, as a minimum, include all information required on
the Company’s backflow assembly test report form.
The Company will return backflow assembly
test report forms that are not acceptable to the BAT or the assembly
If any section or provision of this
article is found to be invalid, the remaining sections
and provisions thereof shall not be
of Policy & Procedure:
This policy and procedure for the
operation of the Summit Water and Supply Company Cross Connection
Control Program shall supersede all previous policies and be in force
immediately upon approval by the Board of Directors of the Company.
The Summit Water and Supply Company
Cross Connection Control Program policy and procedure as shown above shall
remain in effect until changed in writing and the change is dated and
signed by the General Manager.