Chapter 13.06
CONTROL OF BACKFLOW AND CROSS-CONNECTIONS TO THE MUNICIPAL WATER SYSTEM
Sections:
13.06.010 Intent, purpose and control.
13.06.030 Degree of hazard—Definitions.
13.06.055 Testing fee for noncompliance.
13.06.060 Type of protective device required.
13.06.070 Specific backflow assembly installations required.
13.06.080 Fire system backflow—Protection requirements.
13.06.090 Water shutoff conditions.
13.06.100 Water shutoff procedure.
13.06.110 Prevention assembly certification of approval.
13.06.120 Application to install prevention devices.
13.06.130 Assembly inspection.
13.06.135 New installation testing and inspection fee.
13.06.150 Penalties for noncompliance.
13.06.010 Intent, purpose and control.
A. It is the intent of this chapter to recognize that there are varying degrees of hazard to the city’s potable water system, and it is the intent to apply the principle that the degree of protection should be commensurate with the degree of hazard.
B. The purpose of this chapter is:
1. To protect the public potable water supply of the city from the possibility of contamination or pollution by isolating within its customers’ internal distribution system(s) such contaminants or pollutants which could backflow or back-siphon into the public water system; and
2. To promote the elimination and control of existing cross-connections, actual or potential, between its customers’ in-plant potable water system(s) and nonpotable water system(s), plumbing fixtures, and industrial piping systems; and
3. To provide for the continuing program of crossconnection control and certification training, which will effectively prevent the contamination or pollution of all potable water systems. (Ord 91-15 (part), 1991: Ord. 677 § l (part), 1985)
13.06.020 Definitions.
As used in this chapter:
“Air-gap separation (AG)” means the unobstructed vertical distance through the free atmosphere between the lowest opening from any pipe or faucet supplying potable water to a tank, plumbing fixture, or other device and the flood rim of said vessel. An approved air-gap shall be at least double the diameter of the supply pipe, and in no case less than one inch, within sidewalls no less than one and one-half inches. When an air-gap is used at the service connection to prevent the contamination or pollution of a public potable water system, an emergency bypass shall be installed around the air-gap system and an approved, reduced pressure principle backflow prevention assembly shall be installed in the bypass system. An AG must be located as close as practical to the user’s connection, and all piping between the use’s connection and receiving tank must be entirely visible unless other wise approved in writing by the cross-connection control specialist.
“Approved” means accepted by the director or designated city utilities employee who has been certified by AWWA as a “cross-connection specialist,” as meeting an applicable specification stated or cited in this chapter, and suitable for the proposed use.
“Approved atmospheric vacuum breaker (AVB) device” means an assembly of bronze body, poppet of molded plastic for use on cold water only, the device shall have one only upstream mainline resilient-seat shutoff valve and the device shall be installed not less than six inches above the highest outlet on the line.
“Approved double check valve assembly (DC)” means an assembly of two independently acting internally loaded check valves with two tightly closing resilient seated shutoff valves on each end of the assembly, four properly located full port ball valve test cocks for the testing of the water tightness of each check valve. The DC shall be located as close as practical to the user’s connection and shall be installed above grade, if possible, and in a manner where it is readily accessible for testing and maintenance. This type of assembly should be installed at least twelve inches and not more than thirty-six inches above grade (measured from the lowest point of the assembly), and must have adequate side and top clearance to allow access for testing and maintenance. A minimum side and top clearance of twelve inches should be allowed.
“Approved double check detector check valve assembly (DCDA)” means a line-size assembly of two independently acting internally spring-loaded check valves with two tightly closing resilient seated shutoff valves on each end of the assembly, four properly located full port ball valve test cocks for the testing of water tightness of each check valve. Bypass shall consist of one approved double check valve assembly, static pressure drop across the bypass double check valve assembly shall be two PSI less than the mainline check valve assembly.
Where an above-grade installation is impossible due to weather conditions, the DC must be installed in a vault that provides proper clearances for testing and maintenance. The following are minimum criteria for below-grade installation: If a DC must be installed below grade, it must be placed in a vault with a minimum of twelve inches between the bottom of the vault and the bottom of the assembly. The top of the assembly must be no more than eight inches below grade. There must be at least twenty-four inches of clearance between the side of the assembly with the test cocks and the side of the vault, and at least twelve inches clearance between the other side of the assembly and the side of the vault. The vault must have adequate drainage to prevent flooding. Vaults that do not have an integrated bottom must be place on a three-inch layer of gravel.
“Approved reduced pressure principle assembly (RP)” means an assembly with one differential diaphragm relief valve which shall automatically reduce the pressure in the zone between the two check valves. The assembly shall operate to maintain the pressure in the zone between the two check valves at a level less than the pressure on the public water supply side of the assembly. During normal flow, and at cessation of normal flow, the pressure between the two check valves shall be at least two PSI less than the upstream supply pressure. In case of leakage of either of the check valves, the differential relief valve shall operate to maintain this reduced pressure by discharging to the atmosphere. The assembly shall have two resilient seated gate valves, or full-ported ball valves on each end of the assembly and four properly located ball valve test cocks. These assemblies shall be installed a minimum of twelve inches and a maximum of thirty-six inches above ground (measured from the lowest point of the assembly) and twelve inches side clearance. To be approved these assemblies must be installed in a location where no part of the assembly will be submerged.
“Auxiliary water supply” means any water supply on or available to the premises other than the purveyor’s approved public potable water supply. These auxiliary waters may include water from another purveyor’s public potable water supply or any natural source(s) such as a well, spring, irrigation canal or pipeline, etc., or “used waters” or “industrial fluids.” These waters may be polluted or contaminated or they may be objectionable and constitute an unacceptable water source over which the water purveyor does not have controls.
“AWWA” means the American Water Works Association.
“Backflow” means a flow condition, induced by a differential in pressure, that causes the flow of water or other liquids into the distribution pipes of a public water supply from any source other than its intended source.
“Backflow preventer” means a device or means designed to prevent backflow or back-siphonage.
“Backpressure” means the resulting backflow of contamination, polluted, or otherwise unacceptable quality water from a plumbing fixture or other customer source(s) into a public water supply system due to a greater pressure within the customer’s water system.
“Back-siphonage” means the flow of water or other liquids, mixtures, or substances into the distributing pipes of a potable water supply system from any source other than its intended source caused by the sudden reduction of pressure in the potable water supply system.
“Contamination” means an impairment of the quality of the potable water by sewage, industrial fluids or waste liquids, compounds, or other materials to a degree which creates an actual hazard to the public health through poisoning or through the spread of disease.
“Controlled cross-connection” means a connection between a potable water system and a nonpotable water system with an approved backflow prevention device properly installed that will continuously afford the protection commensurate with the degree of hazard.
“Cross-connection control by containment” means the installation of an approved backflow prevention device at the water service connection to any customer’s premises where it is physically and economically infeasible to find and permanently eliminate or control all actual or potential cross-connections within the customer’s water system; or it shall mean the installation of an approved backflow prevention device on the service line leading to and supplying a portion of a customer’s water system where there are actual or potential cross-connections which cannot be effectively eliminated or controlled at the point of cross-connection.
“Customer” means the water user served by the public water system.
“Customer’s water system” means the piping used to convey water supplied by the public water system throughout the customer’s facility.
“Director” means the city manager of the city of Dinuba.
“Fire marshal” means the fire chief of the city of Dinuba or state fire marshal.
“Identification” means each assembly shall have the following information securely attached or embossed on each unit:
a. Manufacturer’s name;
b. Size;
c. Model number;
d. Direction of flow, by arrow;
e. Device serial number;
f. Maximum working water pressure (MWWP);
g. Maximum working water temperature (MWWT).
“Installation” means each assembly shall be installed a minimum of twelve inches and a maximum of thirty-six inches above ground, twelve inches side clearance from any structure and as close to the water purveyor’s meter location as may be possible.
“NFPA” means the National Fire Protection Association.
“Pollution” means the presence of any foreign substance (organic, inorganic, or biological) in the water which tends to degrade its quality so as to constitute a hazard or impair the usefulness or quality of the water to a degree which does not create an actual hazard to the public health but which does adversely and unreasonably affect such waters for domestic use.
Water—Nonpotable. “Nonpotable water” means water which is not safe for human consumption or which is of questionable potability.
Water—Potable. “Potable water” means any water which, according to recognized standards, is safe for human consumption.
Water Purveyor—Public; Municipal Water System. “Public water purveyor” or “municipal water system” means the city of Dinuba public water system.
“Water service connection” means the terminal end of a service connection from the public potable water system; i.e., where the water purveyor loses jurisdiction and sanitary control over the water at its point of delivery to the customer’s water system. If a meter is installed at the end of the service connection, then the service connection shall mean the downstream end of the meter. There should be no unprotected takeoffs from the service line ahead of any meter or backflow prevention device located at the point of delivery to the customer’s water system. Service connection shall also include water service connection from a fire hydrant and all other temporary or emergency water service connections from the public potable water system.
Water—Used. “Used water” means any water supplied by the water purveyor from a public potable water system to a customer’s water system after it has passed through the point of delivery and is no longer under the sanitary control of the water purveyor. (Ord. 98-4 § 1, 1998; Ord. 91-15 (part), 1991: Ord. 709 (part), 1988: Ord. 677 § 1 (part), 1985)
13.06.030 Degree of hazard—Definitions.
“Degree of hazard” means the evaluation of the potential risk to public health and the adverse effect of hazard upon the potable water system as defined in this section:
A. “Health hazard” means any condition, device, or practice in the water supply system and its operation which could create, or in the judgment of the director may create a danger to the health and well-being of the water consumer.
B. “Plumbing hazard” means a cross-connection in a consumer’s potable water system that has not been properly protected by a vacuum breaker, air-gap separation, or backflow prevention device.
The term “plumbing hazard” includes but is not limited to cross-connections to toilets, sinks, lavatories, wash trays, washing machines or lawn sprinkling systems. Unprotected plumbing-type cross-connections shall be considered to be a health hazard.
C. “Pollution hazard” means an actual or potential threat to the physical properties of the water system or to the potability of the public or consumer’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 public health.
D. “System hazard” means an actual or potential threat of severe damage to the physical properties of the public potable water system or the consumer’s potable water system or of a pollution or contamination which would have a protracted effect on the quality of the potable water in the system.
E. “Industrial fluids system” means any system containing fluid or solution which may be chemically, biologically, or otherwise contaminated or polluted in a form of concentration such as would constitute a health, water system, pollution or plumbing hazard if introduced into an approved water supply. This may include, but not be limited to: polluted or contaminated waters; all types of process waters and “used waters” originating from the public potable water system which may have deteriorated in sanitary quality; chemicals in fluid form; plating acids; alkalies; circulated cooling tower waters, open or closed, that may be chemically or biologically treated or stabilized with toxic substances; contaminated natural waters such as from wells, springs, streams, irrigation canals; oils; gases; glycerin; caustic and other acid solutions which may be used for industrial and firefighting purposes. (Ord. 91-15 (part), 1991: Ord. 677 § 1 (part), 1985)
13.06.040 Responsibility.
The director of public works is responsible for the protection of the public potable water system from contamination or pollution due to the backflow or backsiphonage of contaminates or pollutants through the water service connection. The director may delegate this responsibility to a cross-connection control specialist employed by the city.
If, in the judgment of the director, or cross-connection control specialist, an approved backflow prevention assembly is required at the city’s water service connection to any customer’s premises, for the safety of the water system, the director or specialist shall give notice in writing to said customer to install such an approved backflow prevention assembly at each service connection to his premises. The customer shall immediately install such approved assembly or assemblies at his own expense; and failure, refusal, or inability on the part of the customer to install said assembly or assemblies immediately shall constitute a ground for discontinuing water service to the premises until such assemblies have been properly installed. (Ord. 98-4 § 2, 1998)
13.06.050 Requirements.
A. Water System.
1. The water system shall be considered as made up of two parts, the city system and the customer system.
2. The city system shall consist of the source facilities (wells) and the distribution system, and shall include all those facilities of the water system under complete control of the city, from the source of supply up to the point where the customer’s system begins. The source shall include all components of the facilities utilized in the production, treatment, storage and the delivery of water to the distribution system.
3. The distribution system shall include the network of conduits used for the delivery of water from the source to the customer’s system.
4. The customer’s system shall include those parts of the facilities beyond the termination of the city distribution system which are utilized in conveying city-delivered domestic water to point of use.
B. Policy.
1. No water service connection to any premises shall be installed or maintained by the city water department unless the water supply is protected as required by state laws and this chapter. Service of water to any premises shall be discontinued by the director of public works or the cross-connection control specialist if a backflow prevention assembly required by state law or this chapter is not installed, tested, or maintained, or if it is found that a backflow prevention device has been removed, bypassed, or altered, or if an unprotected cross-connection exists on the premises. Service will not be restored until such conditions or defects are corrected.
2. The customer’s system shall be open for inspection at all reasonable times to authorized representatives of the city water services department, city building inspectors and city fire marshal to determine whether crossconnections or other structural or sanitary hazards, including violations of this chapter, exist. When such a condition becomes known, the authorized representatives shall deny or immediately discontinue service to the premises by providing for a physical break in the service line until the customer has corrected the condition(s) in conformance with state and city regulations relating to plumbing and water supplies and regulations adopted pursuant thereto.
3. An approved backflow prevention device shall also be installed on each service line to a customer’s water system at or near the property line or immediately outside the building being served; but in all cases, before the first branch line leading off the service line.
4. The owners of any premises on which, or on account of which, backflow prevention assemblies are installed, shall have the assemblies inspected by a person who has demonstrated their competency in testing of these assemblies to city and has a valid AWWA or ABPA backflow prevention assembly tester certification. Backflow prevention assemblies must be tested at least annually and immediately after installation, relocation or repair. An annual administrative fee of twelve dollars will be charged to the water user/owner of each assembly at the time annual test letters are mailed, and billed on the next utility bill. Assemblies shall be inspected after installation or relocation by city backflow prevention assembly tester or cross-connection specialist. A fee to inspect/test assembly shall be paid by the owner or business required to install the assembly. The city may require a more frequent testing schedule if it is determined to be necessary. No assembly shall be placed back in service unless it is functioning as required. A report in a form acceptable to the city shall be filed with the city each time an assembly is tested, relocated, or repaired. These assemblies shall be serviced, overhauled, or replaced whenever they are found to be defective and all costs of testing, inspection, repair, and maintenance shall be borne by the water user.
5. The city will supply affected water users with a list of persons acceptable to the city to test backflow prevention assemblies. The city will notify affected customers by mail when annual testing of an assembly is needed. This notice shall give the water user sixty days to have the assembly tested.
6. A second notice shall be sent to each water user which does not have his/her backflow prevention assembly tested as prescribed in the first notice within the sixty day period allowed. The second notice will give the water user a two week period to have his/her assembly tested. If no action is taken within the two week period the director/specialist may:
a. Have the assembly tested and maintained by a city staff certified backflow prevention assembly tester. The water user will be charged for the test and any maintenance found necessary on the utility bill;
b. Have a certified tester approved by cross-connection control specialist, test and maintain assembly. The water user will be charged for the test and maintenance found necessary on the utility bill. The tester will be paid from administrative fee fund;
c. Terminate water service to the affected water user until a successful test is received. (Ord. 98-6 § 3, 1998; Ord. 91-15 (part), 1991: Ord. 677 § 1 (part), 1985)
13.06.055 Testing fee for noncompliance.
The charges made for the services provided under Section 13.06.050(B)(6)(a) shall be set, initially as set forth in this section, but the amount of these charges may be modified by the city council from time to time by resolution, so that the fees charged are adequate to recover the city’s actual cost of providing the services and provide no incentive to the water user to refuse to cooperate with enforcement efforts. In addition to the following charges, there shall be added the actual cost of the time spent on repairs, with a minimum charge for at least two hours of time. The initial amounts shall be as follows:
$60.00 for a 3/4 inch to l inch device
$90.00 for a 1 1/2 inch to 2 inch device
$150.00 for a 2 l/2 inch to 4 inch device
$200.00 for a 4 l/2 inch to 8 inch device
(Ord. 98-4 § 4, 1998)
13.06.060 Type of protective device required.
A. In the case of any premises where there is an auxiliary water supply which is not otherwise subject to the provisions of this chapter, the public water system shall be protected by an approved air-gap (AG) separation or an approved reduced-pressure principle backflow prevention device (RPP).
B. In the case of any premises where there is any water or substance that would be objectionable but not hazardous to public health if introduced into the public water system, the public water system shall be protected by an approved double check valve assembly (DCV).
C. In the case of any premises where there is any material dangerous to health, which is handled in such a fashion as to create an actual or potential hazard to the public water system, the public water system shall be protected by an approved air-gap (AG) separation or an approved reduced-pressure principle backflow prevention device (RPP), i.e., sewage treatment plants, pumping stations, chemical plants, hospitals and mortuaries.
D. In the case of any premises where there are “uncontrolled” cross-connections, either actual or potential, the public water system shall be protected by an approved air-gap (AG) separation or an approved reduced-pressure principle backflow prevention device (RPP) at the service connection.
E. In the case of any premises where, because of security requirements or other prohibitions or restrictions, it is impossible or impracticable to make a complete implant cross-connection survey, the public water system shall be protected against backflow or back-siphonage from the premises by the installation of an approved backflow prevention device in the service line. In this case, maximum protection will be required; that is, an approved air-gap (AG) separation or a reduced-pressure principle (RPP) backflow prevention device shall be installed in each service to the premises.
F. In the case of premises having any internal crossconnection that cannot be permanently corrected and controlled, or intricate plumbing and piping arrangements, pumps or other devices, or where entry to all portions of the premises is not readily accessible for inspection purposes, making it impracticable or impossible to ascertain whether or not dangerous cross-connections exist, the public water system shall be protected against backflow from the premises by installing an approved air-gap (AG) separation or reduced-pressure principle (RPP) backflow prevention device in the service line. (Ord. 91-15 (part), 1991: Ord. 677 § 1 (part), 1985)
13.06.070 Specific backflow assembly installations required.
Businesses and uses as designated by the director or cross-connection specialist, shall be required to install a backflow prevention assembly of the type indicated as a minimum, as follows:
|
1. |
Agricultural Chemical Companies |
RP |
|
2. |
Air Conditioning Plants (Commercial A.C. Equipments) |
RP |
|
3. |
Animal Clinics, Animal Grooming Shops and Boarding |
RP |
|
4. |
Apartment or Office Complex with Pond, Lake or Fountain |
RP |
|
5. |
Apartments with Laundromats/Laundry Rooms |
DC or RP |
|
6. |
Automatic or Manual Irrigation Systems, Commercial or Private |
DC or RP |
|
7. |
Autoclave Equipment* |
AG, RP or PVB |
|
8. |
Automotive Detail Shops |
RP |
|
9. |
Automotive Repair with Steam Cleaner, Acid Cleaning or Solvent Equipment |
RP |
|
10. |
Auxiliary Water System or Sources (Interconnected or Not) |
RP |
|
11. |
Bakeries |
RP |
|
12. |
Barber Shops, Beauty Shops or Salons |
DC or RP |
|
13. |
Bars or Cocktail Lounges |
DC or RP |
|
14. |
Battery Manufacturing and Rebuilding |
RP |
|
15. |
Boat Manufacturing and Repair |
RP |
|
16. |
Bottling Plants-Beverage or Chemical |
RP |
|
17. |
Building Two Stories and Higher |
RP |
|
18. |
Buildings with Boilers, Cooling Towers, Water Tanks, and Booster Pumps |
RP |
|
19. |
Buildings with Sewage Pumps |
AG |
|
20. |
Camera Repairing |
DC or RP |
|
21. |
Canneries, Packing Houses or Reduction Plants |
RP |
|
22. |
Car Washes |
RP |
|
23. |
Carpet, Rug And Upholstery Cleaning Firms |
RP |
|
24. |
Catering Firms |
RP |
|
25. |
Chemical Processing or Storage Facilities |
RP |
|
26. |
Chemically Treated (Nonpotable) Water Systems |
RP |
|
27. |
Chemically Treated (Potable) Water Systems |
DC |
|
28. |
Chiller Equipment* |
PVB, DC or RP |
|
29. |
Churches with Baptismal Pools |
RP |
|
30. |
Civic Works Exempt from City of Dinuba Inspection |
RP |
|
31. |
Cleaning and Dye Plants |
RP |
|
32. |
Cold Storage and Ice Manufacturing Plants |
RP |
|
33. |
Commercial Meat Cutting, Packaging and Cold Storage Lockers |
RP |
|
34. |
Commercial Photography Firms |
RP |
|
35. |
Concrete Plants |
DC or RP |
|
36. |
Convalescent Homes and Clinics |
DC or RP |
|
37. |
Convenience Stores and Markets |
DC or RP |
|
38. |
Dairies |
DC or RP |
|
39. |
Dark Rooms |
RP |
|
40. |
Dehydrating Firms |
RP |
|
41. |
Dental Offices, Clinics, and Labs |
RP |
|
42. |
Dialysis Clinics, Experimental Labs |
RP |
|
43. |
Diesel Repair Shops |
RP |
|
44. |
Doctor’s offices |
RP |
|
45. |
Donut Shops |
RP |
|
46. |
Drain Cleaning Service Firms |
AG or RP |
|
47. |
Drapery Cleaning Firms |
RP |
|
48. |
Drip Irrigation Systems |
RP |
|
49. |
Dry Cleaning Equipment |
RP |
|
50. |
Fabrication Plants (Metal, Fiberglass, Foam and Plastic) |
RP |
|
51. |
Fast Food Restaurants |
RP |
|
52. |
Fire Protection Systems Classes 1 and 2 |
DC |
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(No Protection Required with Permission from Specialist) |
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|
53. |
Fire Protection Systems Class 3 |
DC |
|
54. |
Fire Protection Systems Class 4 |
DC or RP |
|
55. |
Fire Protection Systems Class 5 |
RP |
|
56. |
Fire Protection Systems Class 6 (Determined by Specialist and Fire Chief) |
|
|
57. |
Food Processing Facilities Using Nontoxic Materials |
DC or RP |
|
58. |
Food Processing Facilities Using Toxic Materials |
RP |
|
59. |
Frozen Food Processing Plants |
RP |
|
60. |
Fruit and Vegetable Packers |
RP |
|
61. |
Funeral Homes |
RP |
|
62. |
Garbage Disposal Firms |
RP |
|
63. |
Garden Centers and Nurseries |
RP |
|
64. |
Gas Service Stations |
DC or RP |
|
65. |
Gasoline, Oil and Lubricant Marketers and Distributors |
RP |
|
66. |
Graphic Art Photographers |
RP |
|
67. |
Gymnasiums with Saunas, Whirlpools, Boilers etc. |
RP |
|
68. |
Heat Pump Equipment* |
PVB, DC or RP |
|
69. |
Hospitals |
AG or RP |
|
70. |
Hot Tank Equipment* |
PVB, DC or RP |
|
71. |
Hotels and Motels with Laundry Facilities and Restaurants |
RP |
|
72. |
Industrial X-Ray Equipment |
RP |
|
73. |
Inspection and Herbicide Manufacturing and Storage Facilities |
RP |
|
74. |
Laboratories |
RP |
|
75. |
Landscaping with Elevated Areas |
RP |
|
76. |
Laundries |
RP |
|
77. |
Laundromats (with Boilers) |
RP |
|
78. |
Lawn Mower Shops |
RP |
|
79. |
Machine Shops |
RP |
|
80. |
Manufacturing, Processing and Fabrication Facilities |
DC or RP |
|
81. |
Medical Offices |
RP |
|
82. |
Metal Stripping Facilities |
RP |
|
83. |
Mobile Home Parks |
DC or RP |
|
84. |
Mobile Services (Pest Control, Drain Cleaning, Steam Cleaning, Rug Cleaning) |
RP |
|
85. |
Mortuaries and Morgues |
RP |
|
86. |
Offices or Shopping Centers with Uncommitted Lease Spaces |
RP |
|
87. |
Oil and Gas Bulk or Production Facilities |
DC or RP |
|
88. |
Paint Spray Booths |
RP |
|
89. |
Painting Shops Using Water in any Process |
RP |
|
90. |
Paper Processing and Production Facilities |
RP |
|
91. |
Pest Control Services and Suppliers |
RP |
|
92. |
Pet Shops and Suppliers |
RP |
|
93. |
Photography Studios with Processing Equipment |
RP |
|
94. |
Planting Works |
RP |
|
95. |
Pressure Vessel Equipment* |
RP |
|
96. |
Pressure Washing Equipment |
RP |
|
97. |
Public Utility Companies |
RP |
|
98. |
Radiator Shops (Repairs and Backflushing) |
RP |
|
99. |
Refineries |
RP |
|
100. |
Rendering and Reduction Plants |
RP |
|
101. |
Rest Homes |
DC or RP |
|
102. |
Restaurants or Buildings with Commercial Kitchen |
RP |
|
103. |
Sanitary Dump for Recreation Vehicles or Septic System Service Tankers |
AG or RP |
|
104. |
Schools, Colleges, Trade Schools |
RP |
|
105. |
Sewage and Storm Water Pumping Facilities |
AG or RP |
|
106. |
Shows and Movie Theaters |
RP |
|
107. |
Solar Systems and Related Equipment* |
RP |
|
108. |
Spa and Hot Tub Equipment* |
RP |
|
109. |
Steam Cleaners* |
DC or RP |
|
110. |
Swimming Pools |
PVB or RP |
|
111. |
Tank Trucks Filling from Fire Hydrant |
AG or RP |
|
112. |
Taxidermists |
RP |
|
113. |
Temporary Construction Water |
AG or RP |
|
114. |
Testing Laboratories |
RP |
|
115. |
Tire Recapping, Retreading and Repairing Services |
RP |
|
116. |
Vats* |
PVB, DC, or RP |
|
117. |
Waste Water Treatment Facilities |
RP |
|
118. |
Water Filtration and Purification Facilities |
AG or RP |
|
119. |
Where a Cross-Connection is Maintained (Actual or Potential) |
RP |
|
120. |
Where the Use of Public Water is Such as to Subject it to Deterioration in Sanitary Quality |
DC or RP |
|
* |
This equipment or fixture should also have individual, interior protection with the type of backflow assembly shown. |
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A.G. - approved air gap separation |
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R.P. - approved reduced pressure principle backflow assembly |
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D.C. - approved double check backflow assembly |
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PVB - approved pressure vacuum breaker backflow assembly |
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Each new, relocated or existing water service must be reviewed to determine the existing or potential hazard which may occur once the water leaves the water purveyor’s control at the water meter. This type of backflow assembly listed is for the type of assembly required for specific businesses and uses. The assembly listed may not be the final determination in a given situation, a more restrictive assembly will be necessary if a greater hazard is encountered and a less restrictive assembly or none at all may be permitted if a lesser or no hazard exists. The backflow protection assembly shall be installed on the water service line(s), adjacent to the water meter on the water user’s side of the meter. (Ord. 98-4 § 5, 1998)
13.06.080 Fire system backflow—Protection requirements.
Following are the minimum backflow devices required to satisfy containment requirements and shall apply to those fire protection systems connected to the public water system. (AWWA M-14 and NFPA)
The director or designated city utilities employee who has been certified by AWWA as a cross-connection control specialist may require additional protection for the public water system if he deems it necessary due to potential contamination.
A. Class I: Direct connection from public water mains only; no pumps, tanks, or reservoirs; no physical connection from other water supplies; no antifreeze or other additives of any kind; all sprinkler drains discharging to atmosphere, dry wells, or other safe outlets.
B. Class II: Same as Class I, except that booster pumps may be installed in the connections from the street mains (Booster pumps do not affect the potability of the system; it is necessary, however, to avoid drafting so much water that pressure in the water main is reduced below 20 psi).
C. Device—Class I and Class II: No protection required with approval of specialist (Attachment B).
D. Class III: Direct connection from public water supply main plus one or more of the following: elevated storage tanks; fire pumps taking suction from aboveground covered reservoirs or tanks; and pressure tanks (all storage facilities are filled or connected to public water only, the water in the tanks to be maintained in a potable condition).
E. Device—Class III: Approved double check valve (DDC) installed as outlined in Class I and Class 11.
F. Class IV: Directly supplied from public mains similar to Classes I and II, and with an auxiliary water supply on or available to the premises; or an auxiliary supply located within one thousand five hundred feet of the pumper connection.
G. Device—Class IV: Reduced-pressure principle device (RPP) or double check valve (DDC); the valve shall be aboveground installation and as near the public water system as possible.
H. Class V: Directly supplied from public mains, and interconnected with auxiliary supplies, such as: pumps taking suction from reservoirs exposed to contamination, or rivers and ponds; wells, mills or other industrial water systems; or where antifreeze or other additives are used.
1. Device—Class V: Reduced-pressure principle device (RPP) installed aboveground and as near public water system as possible.
J. Class VI: Combined industrial and fire protection systems supplied from the public water mains only, with or without gravity storage or pump suction tanks.
K. Device—Class VI: Protection device would be determined after fire marshal and director had made a complete survey of the fire protection requirements of the premises. (Ord. 98-4 § 6, 1998; Ord. 91-15 (part), 1991: Ord. 677 § 1 (part), 1985)
13.06.090 Water shutoff conditions.
When water users are found that pose a clear and immediate hazard to the potable water supply and these hazards cannot be immediately abated, the shutoff procedures should be initiated.
Conditions requiring water shutoff shall include, but not be limited to the following:
A. Refusal to test backflow prevention device;
B. Refusal to repair or replace faulty backflow prevention device;
C. Direct or indirect connection between a potable water system and a sewer system;
D. Unprotected director indirect connection between a potable water system and a system or equipment containing toxic chemicals or sewage;
E. Unprotected direct or indirect connection between potable water system and auxiliary water system;
F. Unprotected direct connection between potable water system and nonpotable nonpressure system;
G. Refusals to correct violations. (Ord. 91-15 (part), 1991: Ord. 677 § l (part), 1985)
13.06.100 Water shutoff procedure.
When it becomes necessary to shutoff a user’s water, the following steps shall be followed:
A. The director or designated city utilities employee who has been certified by AWWA as a cross-connection control specialist shall determine the degree of hazard to public health. (See subsections (A), (B), (C), (D) and (E) of Section 13.06.030.)
B. If it is determined to be an immediate public health hazard:
1. Immediately discontinue user’s service;
2. Immediately verbally notify the user;
3. Follow up with a certified letter of corrections to be taken prior to service being restored;
4. If and only if the degree of hazard is high, immediately notify state and county health departments. (Ord. 98-4 § 7, 1998; Ord. 91-15 (part), 1991: Ord. 677 § 1 (part), 1985)
13.06.110 Prevention assembly certification of approval.
A. Any backflow prevention assembly required in this chapter shall be of a model and size approved by the director. The term “approved backflow prevention assembly” shall mean an assembly that has been manufactured in full conformance with the standards established by the American Water Works Association (AWWA) entitled: AWWA C506-69 Standards for Reduced Pressure Principle and Double Check Valve Backflow Prevention Assemblies; and have met completely the laboratory and field performance specifications of the Foundation of Cross-Connection Control and Hydraulic Research of University of Southern California established by: Specifications of Backflow Prevention Assemblies - No. 69-2 dated March, 1969, or the most current issue. Approved assemblies shall be manufactured or custom built (homemade) assemblies that meet these specifications and testing requirements. As long as these assemblies pass appropriate tests their use may be continued. Should these assemblies fail to meet standards regardless of manufacture, they shall be immediately replaced.
B. The AWWA and FCCC & HR standards and specifications have been adopted by the director. Final approval of any assembly or system proposed for installation under the terms of this chapter shall be evidenced by a “Certificate of Approval” issued by an approved testing laboratory certifying full compliance with said AWWA standards and FCCC & HR specifications. The following testing laboratory has been qualified by the director to test and certify backflow preventers:
Foundation for Cross-Connection Control & Hydraulic Research University of Southern California University Park Los Angeles, California 90007
C. Testing laboratories other than the laboratory listed above will be added to an approved list as they are qualified by the director. Backflow preventers which may be subject to back pressure or back-siphonage that have been fully tested and have been granted a certificate of approval by the qualified laboratory and are listed on the laboratory’s current list of “Approved Assemblies” may be used without further test or qualification. (Ord. 98-4 § 8, 1998: Ord. 91-15 (part), 1991: Ord. 677 § 1 (part), 1985)
13.06.120 Application to install prevention devices.
Prior to the installation of any backflow prevention device between the public water system and the owner’s facility, the owner or contractor shall make application and receive approval from the director through the designated city utilities employee who has been certified by AWWA as a cross-connection control specialist. Application forms are available from the public works department and the community development department. (Ord. 98-6 § 9, 1998; Ord. 91-15 (part), 1991: Ord. 677 § 1 (part), 1985)
13.06.130 Assembly inspection.
It shall be the duty of the designated city utilities employee who has been certificated by AWWA as a cross-connection control specialist (referred to in this section as the “specialist”) to ensure that at any premises where backflow prevention assemblies are installed to have a certified inspection and operational test made at least once per year and immediately after installation, relocation or repair. In those instances where the specialist deems the hazard to be great enough, the specialist may require certified testing and inspections at more frequent intervals. These inspections and tests may be at the expense of the water user and shall be performed by the city water service department certified personnel, or by a certified tester approved by the specialist. It shall be the duty of the specialist to see that these timely tests are made. The customer user shall be notified by the specialist in advance when the tests are to be undertaken so that he or his representative may witness the tests if it is so desired. Those assemblies found to be defective shall be repaired, overhauled, or replaced at the expense of the customer user. Records of such tests, repairs, and overhaul shall be kept by the water utility department. (Ord. 98-4 § 10, 1998)
13.06.135 New installation testing and inspection fee.
The charges made for the services provided under Section 13.06.135, shall be set, initially as set forth in this section, but the amount of these charges may be modified by the city council from time to time by resolution, so that the fees charged are adequate to recover the city’s actual cost of providing the services and provide no incentive to the water user to refuse to cooperate with enforcement efforts. The initial amounts shall be as follows:
$45.00 for a 3/4 inch to 1 inch device
60.00 for a 1 1/2 inch to 2 inch device
80.00 for a 2 1/2 inch to 4 inch device
90.00 for a 4 I/2 inch to 8 inch device
(Ord. 98-4 § 11, 1998)
13.06.140 Qualification and certification of person to inspect and maintain backflow prevention devices.
A. No person shall be qualified to inspect and maintain backflow prevention devices unless his qualifications have been established by AWWA and to the satisfaction of the director or the designated city utilities employee who has been certificated by AWWA as a cross-connection control specialist (referred to in this section as the “specialist”) as hereinafter required. To determine the qualifications of any person to inspect and maintain backflow prevention devices, the director individually or through the specialist shall have the authority to conduct additional examinations as he may deem necessary. Upon successful completion of such examination and such training as the director shall prescribe, that person must receive a certificate of competence from the AWWA verifying he is qualified to inspect, test and maintain backflow prevention devices. Every person, after receiving a certificate of competence shall be issued such identification as the director and/or specialist shall deem appropriate and such identification shall be kept in the immediate possession of every person holding a certificate of competence while said person is inspecting or maintaining any backflow prevention device in the city.
B. Every person holding a “certificate of competence” issued under the provisions of this chapter shall be required to renew the certificate every three years. Reexamination may be waived at the discretion of the director and/or specialist.
C. Every person receiving a “certificate of competence” under the provisions of this chapter shall be responsible for the competency and accuracy of all inspections and maintenance performed by him on any backflow prevention device.
D. Any person issued a “certificate of competence” who violates or fails to comply with any of the provisions of this chapter or willingly falsifies inspection or maintenance reports submitted to the director shall have the certificate immediately revoked, and shall not be considered for recertification for a period of two years. (Ord. 98-4 § 12, 1998)
13.06.145 Amendments.
All amendments as may be necessary by California Administrative Code Title 17, American Water Works Association (AWWA) and the director, or rates, fees and compensation to be charged and collected by the city for services shall be reviewed, revised and established by resolution of the city council. (Ord. 91-15 (part), 1991: Ord. 709 (part), 1988)
13.06.150 Penalties for noncompliance.
The director through the designated city utilities employee who has been certified by AWWA as a crossconnection control specialist shall have the authority to immediately discontinue service to any premises where cross-connections or other hazards to the water system are found to exist, and shall not again render service to said premises until such conditions are eliminated in accordance with this chapter. Any consumer who willfully violates any of the provisions of this chapter, or alters, bypasses or renders inoperative any backflow prevention device installed under the provisions of this chapter shall, in addition to immediate discontinuance of water service, be deemed guilty of an infraction and upon conviction thereof shall be subject to the fines as specified in Section 1.16.010 of this code.
If any violation be continued, each day’s violation shall be deemed a separate violation. (Ord. 98-4 § 13, 1998; Ord. 91-15 (part), 1991: Ord. 677 § 1 (part), 1985)