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City of Laurie, MO
Morgan County
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[Ord. No. 2002-18 Ch. II §A, 11-11-2002]
The purpose of this provision is to protect the public potable water supply from contamination or pollution by containing within the customer's internal building service piping system(s) or private water system(s) such contaminants or pollutants which could backflow through the building service line into the public water system; promote elimination containment, isolation or control of existing cross-connections, actual or potential, between the public or customer's private potable water systems; and provide for the maintenance of a continuing program of cross-connection control which will systematically and effectively prevent the contamination or pollution of all water systems, both public and private.
[Ord. No. 2002-18 Ch. II §B, 11-11-2002]
Under the provisions of the Federal Safe Drinking Water Act and the Missouri Safety Drinking Water Law RSMo., Chapters, the City has the primary responsibility for preventing water from unapproved sources or any other substances from entering the public water system.
[Ord. No. 2002-18 Ch. II §C, 11-11-2002]
The following words, terms and phrases, when used in this Article, shall have the meanings ascribed to them in this Section, except where the context clearly indicates a different meaning and are in addition to the definitions in Article II, Section 705.100.
BACKFLOW
The flow, other than the intended direction of flow, of any foreign liquids, gases or substances into the public water system.
BACKFLOW PREVENTION ASSEMBLY
An assembly or means assigned to prevent backflow and shall be of a model or construction approved by the City and the Missouri Department of Natural Resources. Four (4) common types of backflow prevention assemblies are:
1. 
AIR-GAP SEPARATIONThe unobstructed vertical distance through the free atmosphere between the lowest opening from any pipe or faucet conveying water or waste to a tank, plumbing fixture, receptor or other assembly and the flood level rim of the receptacle.
2. 
DOUBLE-CHECK VALVE ASSEMBLYAn assembly consisting of two (2) internally spring load check valves, installed as a unit between two (2) tightly closing resilient seated shutoff valves and fittings with properly located resilient-seated test cock.
3. 
DOUBLE DETECTOR CHECK VALVE ASSEMBLYA double-check valve assembly with a water meter and double check in the by-pass line.
4. 
REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTION ASSEMBLYAn assembly consisting of two (2) independently acting approved check valves together with a hydraulically operating, mechanically independent pressure differential relief valve located between the check valves and below the first (1st) check valve. These units are located between two (2) tightly closing resilient-seated, shutoff valves as an assembly and equipment with properly located resilient-seated test cocks.
CLASS I
A contaminant which is considered to be potentially toxic or life/health threatening. MDNR regulations require air-gap or reduced pressure principle assembly.
CLASS II
A pollutant which is not considered toxic or dangerous, but which will otherwise degrade the quality of the water by imparting tastes and odors, color or anything that would be aesthetically displeasing. MDNR regulations require air-gap, reduced pressure principle assembly or a double- check valve assembly.
CONTAINMENT
Protection of the public water system by installing a backflow prevention assembly on the main service line to a facility.
CROSS-CONNECTION
Any pipe, valve or other arrangement or device connecting the pipelines of the City, or facilities directly or indirectly connected therewith, to and with pipes or fixtures supplied with water from any source other than the line of the City directly connected.
HEALTH HAZARD
Any condition, device or practice in the water system and its operation which could create or may create a danger to the health and well-being of the customer.
HEALTH POLLUTION
An actual or potential threat to the physical properties of the water system or to the portability of the public or the customer's potable water system but which would constitute a nuisance or be aesthetically objectionable or could cause damage to the system or its appurtenances, but would not be dangerous to health.
INTERCONNECTION
A plumbing arrangement, other than a cross-connection, by which contamination might be admitted or drawn into the distribution system of the City or into lines connected therewith, which are used for the conveyance of potable water.
ISOLATION
Protection of a customer's internal plumbing system by installing a backflow prevention assembly, air-gap separation or other backflow prevention device at the point of the cross-connection.
MDNR
The Missouri Department of Natural Resources.
POLLUTION
Such contamination or other alteration of the physical, chemical or biological properties of any waters of the State, including change in temperature, taste, color, turbidity, or odor of the waters, or such discharge of any liquid, gaseous, solid, radioactive, or other substance into any waters of the State as will or is reasonably certain to create a nuisance or render such waters harmful, detrimental or injurious to public health, safety or welfare, or to domestic, industrial, agricultural, recreational, or other legitimate beneficial uses, or to wild animals, birds, fish or other aquatic life.
PRIVATE WATER SUPPLY
Any water source or system, other than the City's public water system, that may be available in the building or premises.
PUBLIC WATER SYSTEM
A system for the provision to the public of water for human consumption through pipes or other constructed conveyances, if such system has at least fifteen (15) service connections or regularly serves an average of at least twenty-five (25) individuals daily at least sixty (60) days per calendar year. Such system includes any collection, treatment, storage or distribution facilities used in connection with such system.
[Ord. No. 2002-18 Ch. II §D, 11-11-2002]
A. 
This Article shall apply to all premises served by the public water system of the City and will be reasonably interpreted by the City. It is the City's intent to recognize the varying degrees of hazard and to apply the principle that the degree of protection required shall be commensurate with the degree of hazard.
B. 
If, in the judgment of the City, cross-connection protection is required through either piping modification or installation of an approved backflow prevention device, due notice shall be given to the consumer. The customer shall immediately comply by providing the required protection at his/her own expense; failure, refusal or inability on the part of the consumer to provide such protection shall constitute grounds for discontinuing water service and removal of the water meter to the premises, as provided for in this Article, until such protection has been provided.
C. 
No building service line to any premises shall be installed or maintained unless the water supply is protected as required by this Article. Water service to any premises shall be discontinued by the City if a backflow prevention assembly required by this Article is not installed, tested and maintained or if it is found that a backflow prevention assembly has been removed, by-passed or if any unprotected cross-connection exists on the premises. Service will not be restored until such conditions or defects are corrected.
[Ord. No. 2002-18 Ch. II §E, 11-11-2002]
A. 
No building service pipe from a private well system shall be installed or maintained to any premises where actual or potential cross-connections to the public water system may exist unless such actual or potential cross-connections are abated or controlled to the satisfaction of the City.
B. 
No connection shall be installed or maintained whereby a private water supply may enter the public water system unless such private water supply and the method of connection and use of such supply shall have been approved by the City.
C. 
No building service pipe shall be installed or maintained to any premises in which the plumbing system, facilities and fixtures have not been constructed and installed using acceptable plumbing practices determined by the Superintendent to be necessary for the protection of health and safety.
D. 
The Superintendent or his/her designee shall be permitted to enter private property at any reasonable time for the purpose of observing any unauthorized cross-connections.
[Ord. No. 2002-18 Ch. II §F, 11-11-2002]
A. 
The customer's premises shall be open at all reasonable times to the City to conduct surveys and investigations of water use practices within the customer's premises to determine whether there are actual or potential cross-connections to the customer's water system through which contaminants or pollutants could backflow into the public potable water system.
B. 
On request by the City, the customer shall furnish information on water use practices within the customer's premises.
C. 
It shall be the responsibility of the customer to conduct periodic surveys of water use practices on the customer's premises to determine whether there are actual or potential cross-connections to the customer's water through which contaminants or pollutants could backflow into the customer's or the public water system, to notify the City if such connections are found to exist and to make any repairs necessary to bring customer's water system into compliance with the provisions of this Article.
[Ord. No. 2002-18 Ch. II §G, 11-11-2002]
A. 
The type of protection required by the provision shall depend on the degree of hazard, which exists, as follows:
1. 
An approved air-gap separation shall be installed where the public water system may be contaminated with substances that could cause a severe health hazard.
2. 
An approved air-gap separation or an approved reduced pressure principle backflow prevention assembly shall be installed where the public water system may be contaminated with a substance that could cause a health hazard.
3. 
An approved air-gap separation or an approved reduced pressure principle backflow prevention assembly or an approved double-check valve assembly shall be installed where the public water system may be polluted with substances that could cause a pollution hazard not dangerous to health.
[Ord. No. 2002-18 Ch. II §H, 11-11-2002]
A. 
An approved backflow prevention assembly shall be installed on each service line to a customer's water system serving premises where, in the judgment of the City, actual or potential hazards to the public water system exist. The type and degree of protection required shall be commensurate with the degree of hazard, as determined by the Superintendent.
B. 
An approved air-gap separation or reduced pressure principle backflow prevention assembly shall be installed at the water service meter location or within any premises where, in the judgment of the Superintendent, the nature and extent of activities on the premises or the materials used in connection with the activities or materials stored on the premises would present an immediate and dangerous hazard to health should a cross-connection occur, even though such cross-connection may not exist at the time the backflow prevention device is required to be installed. This includes, but is not limited to, the following situations:
1. 
Premises having private water systems, unless the quality of the private water supply is acceptable to the Superintendent.
2. 
Premises having internal cross-connections that are not correctable or intricate plumbing arrangements which make it impractical to ascertain whether or not cross-connections exist.
3. 
Premises where entry is restricted so that inspection for cross-connections cannot be made with short notice to assure that cross-connections do not exist.
4. 
Premises having a repeated history of cross-connections being established or re-established.
5. 
Premises which, due to the nature of the enterprise therein, are subject to recurring modification or expansion.
6. 
Premises on which any substance is handled under pressure so as to permit entry into the public water system or where a cross-connection could reasonably be expected to occur. This shall include the handling of process waters and cooling waters.
7. 
Premises where materials of a toxic or hazardous nature are handled such that if back siphonage or backpressure should occur, a serious health hazard may result.
C. 
Facilities representing Class I backflow hazards fall into one (1) or more of the categories or premises where an approved air-gap separation or reduced pressure principle backflow prevention assembly is required by the City to protect the public water system and must be installed at these facilities unless all hazardous or potentially hazardous conditions have been eliminated or corrected by other methods to the satisfaction of the City. This includes, but is not limited to, the following types of facilities:
1. 
Aircraft and missile manufacturing plants.
2. 
Automotive plants including those plants which manufacture motorcycles, automobiles, trucks, recreational vehicles and construction and agricultural equipment.
3. 
Potable water dispensing stations which are served by a public water system.
4. 
Beverage bottling plants including dairies and breweries.
5. 
Canneries, packing houses and reduction plants.
6. 
Car washes.
7. 
Chemical, biological and radiological laboratories including those in high schools, trade schools, colleges, universities and research institutions.
8. 
Hospitals, clinics, medical buildings, autopsy facilities, morgues, veterinary facilities, dental clinics and other medical facilities.
9. 
Metal or plastic manufacturing, fabrication, cleaning, plating or processing facilities.
10. 
Plants manufacturing paper and paper products.
11. 
Plants manufacturing, refining, compounding or processing fertilizer, film, herbicides, natural or synthetic rubber, pesticides petroleum or petroleum products, pharmaceuticals, radiological materials or any chemical which would be a contaminant to the public water system.
12. 
Commercial facilities that use herbicides, pesticides, fertilizers or any chemical which would be a contaminant to the public water system.
13. 
Plants processing, blending or refining animal, vegetable or mineral oils.
14. 
Commercial laundries and dye works.
15. 
Sewage, stormwater and industrial waste treatment plants and pumping stations.
16. 
Waterfront facilities including piers, docks, marinas and shipyards.
17. 
Industrial facilities which recycle water.
18. 
Restricted or classified facilities or other facilities closed to the supplier of water or the department.
19. 
Fire sprinkler systems.
20. 
Private water systems.
21. 
Irrigation systems (including in-ground lawn sprinkler systems) with facilities for injection of pesticides, herbicides or chemicals or with provisions for creating back pressure or siphonage.
22. 
Portable tanks for transporting water taken from the public water system.
23. 
Facilities which have pumped or repressurized cooling or heating systems that are served by a public water system, including all boiler systems.
D. 
Facilities representing Class II backflow hazards fall into the category of premises where an approved air-gap separation, reduced pressure principle backflow prevention assembly, double detector check valve assembly or double-check valve assembly is required by the City to protect the public water system and must be installed at these facilities unless all hazardous or potentially hazardous conditions have been eliminated or corrected by other methods to the satisfaction of the City. This includes, but is not limited to, the following types of facilities:
1. 
Tanks to store water from the public water system for fire fighting only, unless such tanks meet the requirements of the MDNR for construction to maintain bacteriological quality of the water.
2. 
Irrigation systems (including in-ground lawn sprinkler systems) not using chemical additives and with no provisions for creating backpressure.
3. 
Fire sprinkler systems not using chemical additives (double detector check valve assembly required).
4. 
Fire lines (double detector check valve assembly required).
5. 
Swimming pools with a piped or permanent connection to the water supply.
6. 
Cross-connections that could permit introduction of contaminants into the public or customer's water system and thereby create a nuisance, be aesthetically objectionable or cause minor damage to the public water system or its appurtenances.
7. 
Hose bibs and these should have an anti-siphoning device.
[Ord. No. 2002-18 Ch. II §I, 11-11-2002]
The property owner of any premises with existing private water service shall protect the public water system against backflow by installing an approved device commensurate with the degree of hazard in the service line in accordance with Section 705.300 and the design construction manual.
[Ord. No. 2002-18 Ch. II §J, 11-11-2002]
All new building service pipes shall protect the public water system against backflow by installing an approved device commensurate with the degree of hazard in the service line in accordance with Section 705.300 and the design construction manual. Additions or major modifications to the public water systems shall be considered to be new service lines for purposes of this Section.
[Ord. No. 2002-18 Ch. II §K, 11-11-2002]
Whenever the existing assembly is moved from its present location or requires more than minimum maintenance or when the City finds that the maintenance constitutes a hazard to health, the unit shall be replaced by a backflow prevention assembly meeting the requirements of this Article and the design construction manual.
[Ord. No. 2002-18 Ch. II §L, 11-11-2002]
Backflow prevention assemblies required by this Article shall be installed at the customer's expense in a manner approved by the Superintendent and in accordance with the City's design and construction manual.
[Ord. No. 2002-18 Ch. II §M, 11-11-2002]
A. 
At the time of construction or installation backflow prevention assemblies will be inspected by the Superintendent.
B. 
It shall be the responsibility of the customer at any premises where backflow prevention assemblies are installed to have certified inspections and operational test made at least once per year.
C. 
In those instances where the Superintendent deems the hazard to be great enough, certified inspections may be required at more frequent intervals.
D. 
These inspections and tests shall be at the expense of the customer and shall be performed by a tester certified by MDNR to perform such tests.
E. 
These assemblies shall be repaired, overhauled or replaced without delay at the expense of the customer whenever said assemblies are found to be defective
F. 
The customer shall mail records of such test, repairs and overhaul to the Superintendent who will keep them for a period of five (5) years. The report must be on an approved form and must contain the name, signature and certificate number of the certified backflow prevention assembly tester attesting to the compliance of the assembly with established operational requirements.
[Ord. No. 2002-18 Ch. II §N, 11-11-2002]
A. 
The City shall deny or discontinue, after reasonable notice to the customer thereof, the water service to any premises wherein any backflow prevention assembly required by this Article is not installed, tested, maintained in a manner acceptable to the City or if it is found that the backflow prevention assembly has been removed or by-passed or if an unprotected cross-connection exists on the premises.
B. 
The Superintendent in person or by certified mail or any other reasonable method available shall provide reasonable notice in writing. The type of notice and the amount of time provided for the owner to be in compliance with the provisions of this Article will be commensurate with the degree of hazard imposed on the public water system and shall be at the discretion of the Superintendent.
C. 
Water service to such premises shall not be restored until the owner has corrected or eliminated such conditions or defects in conformance with this Article to the satisfaction of the Superintendent.
[Ord. No. 2002-18 Ch. II §O, 11-11-2002]
The Superintendent shall be the City's official representative responsible for carrying out and enforcing the duties and obligations of the City as specified in this Article.
[Ord. No. 2002-18 Ch. II §P, 11-11-2002]
This Article is intended to be consistent with the provisions of the International Building and Plumbing Codes as adopted by the City. In the event that any conflict is determined to exist between the provisions of this Article and these codes, the more stringent provision providing the most protection for backflow prevention shall apply.