Cross-Connection Control Program

for Grays Harbor County Water District #2

A.  Requirement for Program

Grays Harbor County Water District #2, State ID Number 292506, hereinafter referred to as “the District”, has the responsibility to protect the public water system from contamination due to cross connections. ​​ A cross connection may be defined as “any actual or potential physical connection between a potable water line and any pipe, vessel, or machine that contains or has a probability of containing a non-potable gas or liquid, such that it is possible for a non-potable gas or liquid to enter the potable water system by backflow.”

All public water systems are required to develop and implement cross-connection control (CCC) programs. ​​ The CCC requirements are contained in Washington Administrative Code (WAC) 246-290-490 of the Group A Drinking Water Regulations. ​​ The minimum required elements of a CCC program are:

 1. Establishment of legal authority and program policies;

 2. Evaluation of premises for cross-connection hazards;

 3. Elimination and/or control of cross connections;

 4. Provision of qualified personnel;

 5. Inspection and testing of backflow preventers;

 6. Quality control of testing process;

 7. Response to backflow incidents;

 8. Public education for consumers;

 9. Record keeping for CCC program; and

 10. Special requirements for reclaimed water use.

Other CCC program requirements include:

 1. Coordination with the Local Administrative Authority (LAA), i.e., the local building or plumbing    official regarding CCC activities;

 2. Prohibition of the return of used water into the public water system (PWS) distribution system; and

  Inclusion of a written CCC program in a Water System Plan (WSP).

B. Program Objectives

The objectives of the CCC program are to:

 1. Reasonably reduce the risk of contamination of the public water distribution system; and

 2. Reasonably reduce the District's exposure to legal liability arising from the backflow of any    contaminant originating from the customer's plumbing system and then supplied to other customers.

C. Summary of Program Decisions

The following table summarizes the major policy and program decisions adopted for Grays Harbor County Water District #2. ​​ The items in the table represent CCC program areas that have more than one acceptable approach or option. ​​ 

CCC Program Decision Summary Table for

Grays Harbor County Water District #2

D. Required Elements of Program

The drinking water regulations for Group A public water systems in Washington, WAC 246-290, require CCC programs to include certain minimum elements. ​​ The elements are listed in WAC 246-290-490(3). ​​ This section describes how the water system intends to comply with each of the required program elements. ​​ Elements are numbered the same as they appear in the WAC.

Element 1: Adoption of a written legal instrument authorizing the establishment and implementation of a CCC program.

Grays Harbor County Water District #2 has adopted a resolution (Resolution No. _________), reproduced as Exhibit A, which authorizes the District to implement a CCC program. ​​ The resolution also authorizes the system to terminate water service to consumers who do not comply with the resolution. ​​ However, the primary method for protection of the distribution system will be the installation of a backflow preventer by the customer, at the customer’s expense.

The attached service contract referred to in the resolution shall be the primary enforcement authority for all new customers. ​​ 

For customers supplied prior to the adoption of the attached resolution, an implied service contract allows the District to protect the distribution system from contamination through a District-installed backflow preventer on a customer's service.

The written and implied contract terms are discussed further under Element 3.

Element 2: Development and implementation of procedures and schedules for evaluating new and existing service connections to assess the degree of hazard.

Initial Cross-Connection Hazard Surveys

The procedures for evaluating the backflow prevention requirements for new and existing customers are as follows:

 1. For all new non-residential services, the District will require that the customer submit with the    application for water service plans for water service within the property for evaluation by the    District's CCS. The CCS will prepare a specification for minimum CCC protection to be installed at   the customer's expense.

 2. As an alternative to the above requirement for a survey by the ​​ CCS, the customer may agree to    install an approved air gap (AG) or RPBA for premises isolation as a condition of service.

 3. For all new residential services, the District will require that the customer submit with the     application for water service a completed “Water Use Questionnaire” form provided by the District. ​​   If the customer's questionnaire indicates special plumbing, such as a lawn sprinkler system, or    hazardous water use on the premises, the District CCS shall evaluate the hazard and specify the    degree of protection to be installed at the customer's expense.

 4. For all existing non-residential services, the District will require the customer to submit to an on-   site investigation by the District's CCS within 30 days of notification. The CCS will provide a    specification for the appropriate level of protection to be installed at the customer's expense.

 5. As an alternative to the above requirement for a survey by the District's CCS, the customer may    agree to install an AG or RPBA for premises isolation within 90 days of notification by the District   or an alternate time period acceptable to the District.

 6. Existing non-residential services with existing installed protection previously deemed appropriate    are considered in compliance with this element provided no major changes have been made to the    customer's plumbing.

 7. For all existing residential services, the District will require the customer to submit to the District,   within 30 days of notification, a completed “Water Use Questionnaire” provided by the District. If   the questionnaire responses indicate a need for protection, the District CCS will specify an     appropriate level of protection and the District will require the customer to install the specified    protection or the customer may request the District to install the protection and bill back the    customer.  ​​​​ The customer may contest the District's determination and request an on-site     investigation by the District's CCS. ​​ Following the on-site investigation the CCS's determination    is final.

 8. For all existing services, should the customer fail to supply the required information for a     hazard assessment or fail to submit a completed “Water Use Questionnaire,” the District may have    the assessment made by a CCS employed by the District, require the installation of appropriate    protection for premises isolation, or take other such actions consistent with the previously stated    policies and bill the customer for the associated costs.

Cross-Connection Hazard Survey Schedule for Initial Hazard Assessments

The schedule for initial hazard assessment is outlined in the following table. ​​ The schedule starts from the date the CCC program is established. ​​ 

Cross-Connection Hazard Survey Schedule for Subsequent Hazard Re-Assessments

For subsequent cross-connection hazard surveys, procedures for evaluating the backflow prevention requirements are:

 1. For residential services, the District will require the customer to submit to the District, within 30    days of District notification, a completed “Water Use Questionnaire.” ​​ The procedure used for    evaluating the hazard re-assessment and the potential change in the required backflow prevention    will be the same as used for the initial hazard assessment.

 2. For all non-residential services, the District will require the customer to submit to the District,    within two months of District notification, a non-residential “Water Use Questionnaire”. If changes   to the plumbing or water use from previous questionnaires is indicated, the District shall require an   on-site investigation and re-evaluation of the appropriate level of protection. ​​ Changes in the level of   protection will be accomplished at the customer's expense. If the customer declines an on-site    investigation the District's CCS will recommend an appropriate level of premises isolation to be    installed at the customer's expense.

 3. The frequency of hazard re-assessments will be as shown in the table below:

 4. The District will inform the customer that the District's survey of a customer's premises (whether by   a representative of the District or through the evaluation of a questionnaire completed by the    customer) is for the sole purpose of establishing the District's minimum requirements for the    protection of the public water supply system, and that the required backflow protection will be    commensurate with the District's assessment of the degree of hazard. ​​ 

 5. The District will also inform the customer or any regulatory agencies that the District's survey,    requirements for the installation of backflow prevention assemblies, lack of requirements for the    installation of backflow prevention assemblies, or other actions by the District’s personnel or agent   do not constitute an approval of the customer's plumbing system or an assurance to the customer or   any regulatory agency of the absence of cross connections.

Element 3: Development and implementation of procedures and schedules for elimination and/or control of cross-connections.

Backflow Preventer Requirements

The following service policy shall apply to all new and existing customers:

 1. The District will require that water service to all non-residential customers be isolated at the meter   by a DOH-approved DCVA or RPBA acceptable to the District unless it is demonstrated that no    hazards exist on the property. ​​ All high-hazard connections of the type described in Table 9 of WAC   246-290-490 shall be isolated with an RPBA.

 2. In lieu of isolation with a DCVA, other non-residential customers, with the concurrence of the    District’s CCS, may install in-premises protection commensurate with the degree of hazard, as    determined by the District’s CCS.

 3. The District will require all residential customers with facilities of the type described in Table 9 of   WAC 246-290-490 to be isolated with an RPBA. ​​ All other residential customers with special    plumbing or water use on the premises will be isolated with a DCVA. ​​ “Special plumbing” includes,   but is not limited to, the following:

  a. A lawn irrigation system;

  b. A solar heating system;

  c. An auxiliary source of supply, e.g., a well or creek;

  d. Piping for livestock watering, hobby farming, etc.;

  e. Residential fire sprinkler system

 4 All remaining residential customers will be isolated at the meter by a District-installed single    check valve.

 5. For all customers that have a written service contract with the District, the required premises    isolation DCVA or RPBA shall be:

 a. Purchased and installed by the customer (at the customer's expense) immediately     downstream of the water meter in accordance with the District's standards described    hereinafter; or the customer may request the District to install the assembly and bill the    customer. And:

  b.  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ Maintained, tested, and inspected in accordance with the District's standards described        ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ hereinafter.

6. For new customers, the District will not turn on water (except for testing purposes) at  the meter until the customer complies with the above requirements.

7. The failure of the customer to comply with the District’s installation and maintenance requirements shall constitute a breach of contract by the customer. ​​ The District may then proceed with corrective action provisions stipulated in the contract.

 8. Customers without written contracts are considered to have an implied contract that requires    the customer to bear all reasonable costs of service. ​​ The District will install the required DCVA   or RPBA on the service, upstream of the meter, and charge the customer for the cost of the initial   installation, and all future maintenance, testing, and repair shall be at the customer's expense. ​​    

 9. The failure of the customer to have the specified level of protection installed, inspected and tested   shall result in termination of water service.

Approved Backflow Preventers and Installation

All backflow preventers relied upon by the District to protect the public water system shall meet the definition of “approved backflow preventer” as contained in WAC 246-290-010. ​​ The District will obtain and maintain a current list of assemblies approved for installation in Washington State from the DOH Office of Drinking Water.

 1. All backflow preventers will be installed in:

  a. The orientation for which they are approved;

  b. A manner and location that facilitates their proper operation, maintenance, and testing or     inspection; ​​ 

  c. A manner that will protect them from weather-related conditions such as flooding and     freezing; and

  d. Compliance with applicable safety regulations.

 2. Installation standards contained in the most recently published edition of the Pacific Northwest    Section, American Water Works Association (PNWS-AWWA) CCC Manual or the University of    Southern California Foundation for Cross-Connection Control and Hydraulic Research     (USCFCCCHR) CCC Manual shall be followed unless the manufacturer’s requirements are more    stringent.

 3. The District has no regulatory responsibility or authority over the installation and operation of the    customer's plumbing system. ​​ The customer is solely responsible for compliance with all applicable   regulations and for prevention of contamination of his plumbing system from sources within his/her   premises. ​​ Any action taken by the District to survey plumbing, inspect or test backflow prevention   assemblies, or to require premises isolation (installation of DCVA or RPBA on service) is solely for   the purposes of reducing the risk of contamination of the District's distribution system.

4. The District will inform the customer that any action taken by the District shall not  be construed by the customer as guidance on the safety or reliability of the customer’s plumbing system. ​​ The District will not provide advice to the customer on the design and installation of plumbing other than through the general public education program discussed in Element 8.

5.  ​​ ​​ ​​ ​​ ​​ ​​​​ Except for easements containing the District's distribution system, the District will not undertake  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​  work on the customer's premises.

Schedule for Installation of Backflow Preventers

The following table shows the schedule that the District will follow for installation of backflow preventers when they are required (based on the hazard evaluation).

The District may consider granting an extension of time for installation of backflow preventer for an existing connection if requested by the premises owner.

Element 4: Provision of qualified personnel, including at least one person certified as a CCS, to develop and implement the CCC program.

​​ The responsibility for administration of the CCC Program rests with the District. ​​ General policy direction and risk management decisions are established by the Board of Commissioners.

 1. The District will employ or have on staff at least one person certified by DOH as a CCS to develop   and implement the CCC program. ​​ As an alternative, or when no staff or employees are properly    qualified, the District may retain a DOH-certified CCS on contract to provide the necessary expertise   and services.

 2. The following cross-connection related tasks will be performed by or under the direction of the    District’s certified CCS (on staff or under contract):

  a. Preparation of and recommendations regarding changes to the CCC program;

  b. Performance of and/or reviews of CCC hazard evaluations;

  c. Recommendations on the type of backflow preventer to be installed;

  d. Recommendations on schedules for retrofitting of backflow preventers;

  e. Inspections of backflow preventers for proper application and installation;

  f. Reviews of backflow preventer inspection and test reports;

  g. Reviews of backflow testing quality control information;

  h. Recommendations and/or the granting of exceptions to mandatory premises isolation;

  I. Participation in or cooperation with other water utility staff in the investigation of backflow    incidents and other water quality problems;

  j. Completion of Backflow Incident Reports; and

  k. Completion of CCC Activity and Program Summary Reports.

 3. The District may delegate other CCC program activities to other personnel who are not certified    CCS's, including clerical support staff. ​​ These activities include:

  a. Administration of paperwork associated with service agreements;

  b. Mailing, collecting, and initial screening of hazard evaluation/water use questionnaires;

  c. Mailing of assembly testing notices;

  d. Receiving and screening of assembly testing reports;

  e. CCC program database administration and record keeping;

  f. Dissemination of public education material; and

  g. Assisting tasks associated with coordination with the LAA.

 4. The following table identifies the current CCS employed or retained on contract by the District to    manage the District’s CCC program and/or act as the CCC technical resource for the District:

Element 5: Development and implementation of procedures to ensure that approved backflow preventers are inspected and/or tested (as applicable).

Inspection and Testing of Backflow Preventers

 1. All backflow preventers that the District relies upon for protection of the water system will be    subject to inspection and, if applicable, testing. This includes backflow preventers installed for in-   premises protection that the District relies upon for protection of the water systems.

 2. Inspection and testing of backflow preventers will be as follows:

 a. The District’s DOH-certified CCS will inspect backflow preventers for proper application     (i.e., to ensure that the preventer installed is commensurate with the assessed degree of     hazard).

 b. Either a DOH-certified CCS or backflow assembly tester (BAT) will perform inspections of   backflow preventers for correct installation.

 c. A DOH-certified Backflow Assembly Tester (BAT) will test all assemblies relied upon by    the District to protect the public water system.

Frequency of Inspection and Testing

 1. Inspection and testing of backflow preventers will be conducted:

 a. At the time of installation;

 b. Annually after installation;

 c. After a backflow incident; and

 d, After repair, reinstallation, relocation, or re-plumbing.

2. The District may require a backflow preventer to be inspected and/or tested more frequently than once a year, when it protects against a high-health hazard or when it repeatedly fails tests or inspections.

Responsibility for Inspection and Testing

1. The District will be responsible for inspection and testing of all District-owned  backflow preventers.

2. The District will require the customer to be responsible for inspection and testing of backflow preventers owned by the customer. ​​ The customer shall employ, at customer expense, a DOH-certified BAT to conduct the inspection and test within the time period specified in the testing notice sent by the District. ​​ The test report shall be completed and signed by the BAT, then countersigned and returned by the customer to the District, before  the due date specified by the District. ​​ The customer may request an extension of the due date for returning a test report by submitting a written request to the District. ​​ The District may grant one extension up to 90 days.

Approved Test Procedures

The District will require that all assemblies relied upon to protect the public water system be tested in accordance with DOH-approved test procedures as specified in WAC 246-290-490(7)(d). ​​ Any proposal to use alternate test procedures must be approved by the District’s CCS.

Notification of Inspection and/or Testing

The District will notify in writing all customers who own backflow preventers that are relied upon to protect the public water system to have their backflow preventer(s) inspected and/or tested. ​​ Notices will be sent out not less than 30 days before the due date of the inspection and/or test. ​​ The notice will also specify the date (up to 30 days after the due date of the inspection and/or test date) by which the inspection/test report must be received by the District.

Enforcement

When a customer fails to send in the inspection/test report within 15 days after the due date specified, and the District has not approved an extension to the due date, the District will take the following enforcement action:

 a. The District will send a second notice giving the customer an additional 15 days to send in the    inspection/test report.

 b. If the customer has not sent in the inspection/test report within 10 days of the due date given in the   second notice, the District will send a third notice, by certified mail or by hand delivery giving the    customer an additional 15 days to send in the report. ​​ The notice will also inform the customer that   failure to satisfactorily respond to this notice will result in water service shut-off. ​​ 

 c. The District will send copies of the third notice to the owner and occupants of the premises (if    different from the customer) and to the LAA.

 d. If the owner and/or occupants have not responded satisfactorily to the District within 10 days of the   due date specified in the third notice, the District will implement water service shut-off procedures.

 e. The District may offer to arrange for the inspection and/or testing of the customer-owned backflow   preventers by a certified BAT and will bill the customer the actual or typical cost of inspection    and/or testing in the service area plus reasonable administrative costs. ​​ Collection and enforcement   procedures for such charges will be the same as for other water utility charges.

Element 6: Development and implementation of a backflow prevention assembly testing quality assurance/quality control program.

List of Pre-Approved BATs

1. The District will maintain a list of local, DOH-certified BATs that are pre-approved by the  District  to perform the following activities:

  a. Backflow preventer inspection for proper installation; and

  b. Backflow assembly testing.

2. The District will also maintain a list of local DOH-certified CCSs that are pre-approved by  the  District to perform the following activities:

  a. Cross-connection hazard evaluations;

  b. Backflow preventer inspection for proper application; and

  c. Backflow preventer inspection for proper installation.

3. The list(s) will be revised annually or more frequently if necessary.

Pre-Approval Qualifications

BATs and CCSs who wish to be included on the District’s pre-approved list and/or provide testing in the District’s service area must apply to the District and furnish the following information:

 1. Evidence of current DOH certification in good standing;

 2. Make and model of testing equipment (BAT listing only);

 3. Evidence of test equipment verification of accuracy and/or calibration within the past 12 months    (BAT listing only)

Quality Assurance

1. The District’s CCS will review within 30 days of receipt the backflow preventer inspection/test  report forms submitted by the customer. ​​ 

2. The District’s CCS will provide follow up on test reports that are deficient in any way.

3. The District’s CCS will report incidences of fraud or gross incompetence on the part of any  BAT or CCS to DOH Operator Certification program staff.

Element 7: Development and implementation (when appropriate) of procedures for responding to backflow incidents.

Backflow Incident Response Plan

The District's CCS will participate in developing a backflow incident response plan that will be part of the water system’s emergency response program as required by WAC 246-290-415(2). ​​ The incident response plan will include, but will not be limited to:

 a. Notification of affected population;

 b. Notification and coordination with other agencies, such as DOH, the LAA, and the local health    jurisdiction;

 c. Identification of the source of contamination;

 d. Isolation of the source of contamination and the affected area(s);

 e. Cleaning, flushing, and other measures to mitigate and correct the problem; and

 f. Apply corrective action to prevent future backflow occurrences.

Technical Resources

The District will use the most recently published edition of the manual, Backflow Incident Investigation Procedures, published by the PNWS-AWWA as a supplement to the Backflow Incident Response Plan for the District.

Element 8: Development and implementation of a cross-connection control public education program.

Customer Education

1. The District will distribute with water bills or some other means, at regular intervals, public education brochures to system customers. ​​ For residential customers, such brochures will describe the cross-connection hazards in homes and the recommended assemblies or devices that should be installed by the homeowner to reduce the hazard to the public water system. ​​ The education program will emphasize the responsibility of the customer in preventing the contamination of the public water supply. ​​ The District’s staff will produce the public education brochures or the District will obtain brochures from:

  a. PNWS-AWWA;

  b. Spokane Regional Cross-Connection Control Committee (SRC4);

  c. Western Washington Cross-Connection Prevention Professionals Group (The Group);

   USC FCCCHR;

  d. Other national backflow prevention associations, such as the American Backflow      Prevention Association (ABPA); and/or

  e. Other water utilities.

2. The information distributed by the District will include, but not be limited to, the following  subjects:

  a. Cross-connection hazards in general;

  b. Irrigation system hazards and corrective actions;

  c. Fire sprinkler cross-connection hazards;

  d. Importance of annual inspection and/or testing of backflow preventers; and

  e. Thermal expansion in hot water systems when backflow preventers are installed for     premises isolation.

3. The District will distribute information brochures to all customers every two to three years,  and to  every new customer at the time the service agreement is signed. ​​ 

Element 9: Development and maintenance of cross-connection control records.

Types of Records and Data to be Maintained

The District will maintain records of the following types of information required by WAC 246-290-490:

 1. Service connections/customer premises information including:

 a. Assessed degree of hazard; and

 ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ b. Required backflow preventer to protect the public water system.

 2. Backflow preventer inventory and information including:

  a. Air gap (AG) location, installation and inspection dates, inspection results  and person     conducting inspection;

  b. Backflow assembly location, assembly description (type, manufacturer, make, model, size,    and serial number), installation, inspection and test dates, test results and data, and person     performing test; and

  c. Information on atmospheric vacuum breakers used for irrigation system applications,     including manufacturer, make, model, size, dates of installation and inspections, and person    performing inspections.

3. The District will maintain records on all assemblies that protect the public water system from  contamination. ​​ At a minimum, the District will maintain records on all premises isolation  assemblies required to protect the public water system. ​​ Where applicable, the above information  will also be maintained for backflow preventers installed for in-premises protection that are  relied upon by the District to protect the public water system.

Reports to be Prepared and Submitted to DOH

 ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ 1.  The District will prepare the following reports required by WAC 246-290-490 including:

  a. Cross-connection control program activities report for the calendar year, to be sent to DOH    when requested;

  b. Cross-connection control program summary information, when required, or when there are    significant policy changes;

  c. Backflow incident reports to DOH (and voluntarily to the PNWS-AWWA CCC      Committee); and

  d. Documentation when exceptions to mandatory premises isolation are granted.

   At a minimum, the District’s CCS will prepare and sign the exceptions reports.

 2. The District’s CCS will prepare and sign all CCC-related reports required by WAC 246-290-490.

Element 10: Additional cross-connection control requirements for reclaimed water.

At this time the District does not receive or distribute reclaimed water. ​​ In the event that reclaimed water use is proposed within the PWS’s service area, the District will make all cross-connection control requirements mandated by the Permitting Authority in accordance with Chapter 90.46 RCW part of the written CCC program plan and comply with such additional requirements.

E. Other Provisions

Coordination with Local Administrative Authority

1. Both WAC 246-290-490 and the Uniform Plumbing Code amended for Washington require  coordination between the water District and the Local Administrative Authority (LAA) in all  matters pertaining to cross-connection control.

2. The District will provide a copy of this CCC program to The Grays Harbor County Building  Department via a copy of the District's water system plan or in a separate document. ​​ The District  will inform the LAA of any changes in policy or procedure that may impact the LAA.

3. The District will provide information to the LAA in a timely manner regarding any:

 a. Requirement imposed on a residential customer for the installation of a DCVA or an RPBA   on the service, with a description of the cross-connection hazard identified;

 b. Upgrade of the premises isolation backflow preventer, i.e., from a DCVA to an RPBA;

 c. Action taken to discontinue water service to a customer; and

 d. Backflow incident known by the District to have contaminated the public water system or   a customer’s plumbing system.

Prohibition of Return of Used Water. ​​ 

The PWS must prohibit the intentional return of used water to the District’s distribution system per WAC 246-290-490 (2)(l).

1. Used water is defined as water that has left the control of the District. ​​ This includes water  used for  heating and cooling purposes and water that may flow back into the distribution system from  customers with multiple connections. ​​ 

2. It is the policy of the District to:

 a. Prohibit the intentional return of used water to the distribution system by any customer    served by the public water system; and

 b. Require that all customers with multiple connections, where the hydraulics permit the    potential return of used water, to install a backflow preventer (DCVA or RPBA)     commensurate with the degree of hazard at each point of connection. ​​ 

Unapproved Auxiliary Supplies. ​​ 

All water supplies other than those owned by the District are considered unapproved auxiliary supplies as defined in WAC 246-290-010. The District will require backflow protection for customers with auxiliary supplies on their premises as follows:

 1. Per Table 9 of WAC 246-290-490, the District will require the installation of an RPBA for premises   isolation at the service connection to any customer having an unapproved auxiliary supply on the    premises that is interconnected with the District’s water system.

 2. The District will require the installation of a DCVA for premises isolation at the service connection   to any customer with an unapproved auxiliary water supply not interconnected with the District’s    water system.

Tanker Trucks. ​​ 

The District may allow tanker trucks to obtain water from the District’s water system under the following conditions:

 1. The tanker truck is equipped with an approved AG or an approved RPBA with a current satisfactory   inspection or test report.

 2. The tanker truck will obtain water from District-designated watering points only. ​​ 

Temporary Water Connections. ​​ 

The District will not supply water through temporary connections, such as those used for construction projects or main disinfection, except through a backflow preventer arrangement approved by the District. ​​ The applicant for the temporary connection shall document that the backflow preventer is a DOH-approved model and has passed an inspection and/or test within the past 12 months and/or upon relocation, whichever is more recent.”

Interties and Wholesale Water Customers.

 1. The District will require that interties with other public water systems or wholesale customers (such   as mobile home parks) be isolated at the point of delivery by:

 a. A minimum of a DCVA; and

 b. A minimum of an RPBA if the District considers the purchasing system or wholesale    customer to pose a high-health hazard to the District’s system.

 2. The District may waive or reduce the level of protection at the intertie, if the purchasing public  water system or wholesale customer:

  a. Is a Group A public water system not exempt from DOH regulation as per WAC 246-290-    020(2);

  b. Has a CCC program that complies with WAC 246-290-490 and which has been approved     by DOH; and

  c. Implements the CCC program at a level satisfactory to the District.

F. Relationship to Other Planning and Operations Program Requirements

The District will consider the requirements and consequences of the CCC program on the utility’s planning and operations requirements. ​​ Such considerations include, but are not limited to ensuring:

 a. And promoting adequate communication between CCC program personnel and other water    utility staff;

 b. That adequate training is provided to all staff to recognize potential cross-connection control    problems;

 c. That cross-connection issues be considered in water quality investigations;

 d. That the design of the water distribution system makes adequate provisions for expected head    losses incurred through the installation of ​​ backflow assemblies;

 e. That CCC program personnel be consulted in the design of water and wastewater treatment    facilities and when proposals are made to receive or distribute reclaimed water;

 f. That operations under normal and abnormal conditions do not result in excessive pressure losses;   and

 g. That adequate financial and administrative resources are available to carry out the CCC pro   gram. Cross-Connection Control Program Plan for Grays Harbor County Water District #2