Prior to the adoption of Ord. 17835 on 09/15/2003, Section 27-57 read as follows.

    (a) A c C ross-connection s include  is any physical connection between a potable water supply and any waste pipe, soil pipe, sewer, drain, or any unapproved source or system. Furthermore, it is Cross-connections include  any potable water supply outlet which is submerged or can be submerged in waste water and/or any other source of contamination and any source or system that is, in the opinion of the director, based on the standards of the Missouri Division of Health, nonpotable, and through which backflow can occur to contaminate the department's system. Cross-connections include  B b ypass arrangements, jumper connections, removable sections, swivel or changeover devices, and other temporary or permanent devices through which or because of which backflow can occur are to be considered cross-connections.  Cross-connections may be considered as direct or indirect. A direct cross- connection is direct when  where the department's water system is physically joined to a system containing unsafe water, sewage, or other waste that could contaminate the safe water system. An indirect cross-connection is indirect when  may be a condition where a source of contaminated water may be blown across, sucked, or diverted into the department's system.

    (b) Unprotected c Cross-connections in the customer's water installation are not permitted. If a an unprotected  cross-connection is discovered, the department, after giving the customer no less than fifteen (15) days' notice of its intention, will discontinue service, unless the condition is corrected or an approved backflow prevention device is installed by and at the expense of the customer. If, in the opinion of the director, a real and serious threat to public health is posed, the department may discontinue service without notice.

    (c) Service connections will not be made nor allowed to continue where there is, in the opinion of the director, a strong potential for hazardous cross-connections, unless the customer will install and maintain ,  at the customer’s  his own expense ,  a backflow prevention device approved by the department.

    (d) Approved backflow prevention devices are required for the following facilities:

Facility
Required Device*

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    *Note--A.G. refers to air gap; R.P.D. refers to reduced pressure backflow device; D.C.A. refers  to double cheek valve assembly.
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Beverage bottling plants
A.G., R.P.D. or D.C.A.
Car washes
R.P.D.
Cold storage plants
A.G. or R.P.D.
Dairies
A.G., R.P.D. or D.C.A.
Film laboratoriesiA.G. or R.P.D.
Hospitals, medical buildings, sanitariums, morgues, autopsy facilities
A.G. or R.P.D.
Industries using toxic substances
R.P.D.
Irrigation systems separate from domestic systems, such as parks, playgrounds, cemeteries,  golf courses, schools, estates
A.G. or R.P.D.
Laundries
R.P.D.
Lawn sprinkling systems adjunct to domestic systems
D.C.A.
Nursing or convalescent homes and clinics
D.C.A.
Packinghouses
A.G. or R.P.D.
Power plants
R.P.D.
Sewage treatment plants
A.G. or R.P.D.
Stockyards
R.P.D.
Water loading stations
A.G. or D.C.A.

     Those facilities classified as actual or potential Class I backflow hazards (by the Missouri Department of Natural Resources, the Director of Public Works or the Director of Water and Light Department) shall be equipped, at a minimum, with an air gap separation or reduced pressure principle backflow prevention assembly.  Those facilities classified as actual or potential Class II backflow hazards shall be equipped, at a minimum, with a double-check valve assembly.

    The director, at his discretion, may require a device at other facilities dangerous to public health.

    (e) Backflow prevention devices shall be approved by the director before installation by the customer and shall have been certified by a recognized testing laboratory acceptable to the director. Installation and initial testing  shall be inspected and approved by the department.

    (f) The customer shall install and  be responsible to maintain all backflow prevention devices in good working order and to make no piping or other arrangements for bypassing the devices. The customer shall permit access to the premises by the certified backflow prevention assembly tester, supplier of water and DNR representatives, at reasonable times and upon presentation of identification, for inspection of the customer water system or testing of backflow prevention assemblies installed in accordance with this ordinance.

    (g) Periodic testing and inspection schedules shall be established by the department for all backflow prevention devices. Inspection intervals will not exceed five (5) years; more frequent intervals may be established in accordance with the age and condition of the device the minimum requirements set out in the Rules of the Missouri Department of Natural Resources.  As a courtesy only, the Department may send a reminder notice to customers with known backflow prevention devices .

     (h)   It shall be the responsibility of the customer to have each assembly inspected and tested by a properly certified and listed tester at the time of construction or installation and each year thereafter, no later than thirty (30) days after the anniversary of the original inspection test date. Backflow prevention assembly testers shall be certified through a Department of Natural Resource approved program and be listed with the department.

     (i)   Testers shall report to the supplier of water and the customer the results of inspections or tests conducted in compliance with applicable state regulations.  Reports of tests shall contain the signature of the certified tester, attesting to the compliance or noncompliance of the assembly with established operational requirements.  Reports shall be submitted to the department within thirty (30) days after performing the inspection or test.

     (j)  Testing, inspection, and overhaul of devices may  will be performed by department personnel when it is deemed in the interest of the department and other customers.  The device owner will be charged not less than the actual cost for the testing and inspection, plus any cost  at no cost to the customer except for replacement or repair parts and other materials.

     (k)   A violation of any part of this section may cause the customer’s water supply to be disconnected by the department.

(Code 1964, § 15.331)