[R.O. 2008 §705.600; Ord. No. 6776 §§1 — 2, 8-22-2005; Ord. No. 7102 §§1 — 2, 4-13-2009]
In order to maintain proper and sufficient pressures in the distribution system for fire protection and other purposes, the City reserves the right, at all times, to determine, limit and regulate, in a responsible and non-discriminating manner, the maximum amounts of water a customer may use.
[R.O. 2008 §705.610; Ord. No. 6776 §§1 — 2, 8-22-2005; Ord. No. 7102 §§1 — 2, 4-13-2009]
The City will not install nor maintain pressure regulators, either for the purpose of regulating sustained high pressure or fluctuating pressure.
[R.O. 2008 §705.620; Ord. No. 6776 §§1 — 2, 8-22-2005; Ord. No. 7102 §§1 — 2, 4-13-2009]
A. 
Backflow Control By Containment.
1. 
Class I backflow hazards. The customer or the customer's authorized representative shall construct or install a department-approved air-gap separation or reduced pressure principle backflow prevention assembly on the customer service line in accordance with Section 705.430(B) when:
a. 
The supplier of water or local governmental agency (if one exists) requires protection from an actual or potential Class I backflow hazard at any facility;
b. 
Modification is made to the customer water system at an existing facility, which is designated an actual or potential backflow hazard by Subsection (A)(3). If an addition or modification requiring a separate customer service line is made to an existing facility, the new service line as well as the existing customer service line shall be equipped with a Department-approved backflow prevention assemblies;
c. 
A new customer service line connection is made to a facility which is considered an actual or potential backflow hazard by Subsection (A)(3); or
d. 
A backflow incident occurs which introduces a contaminant into the public or customer water system which may create a health hazard.
2. 
Following is a list of facilities, not all inclusive, considered to be actual or potential Class I backflow hazards.
a. 
Aircraft and missile manufacturing plants.
b. 
Automotive plants including those plants which manufacture motorcycles, automobiles, trucks, recreational vehicles and construction and agricultural equipment.
c. 
Potable water dispensing stations which are served by a public water system.
d. 
Beverage bottling plants including dairies and breweries.
e. 
Canneries, packing houses and reduction plants.
f. 
Car washes.
g. 
Chemical, biological and radiological laboratories including those in high schools, trade schools, colleges, universities and research institutions.
h. 
Hospitals, clinics, medical buildings, autopsy facilities, morgues, mortuaries and other medical facilities.
i. 
Metal or plastic manufacturing, fabrication, cleaning, plating or processing facilities.
j. 
Plants manufacturing paper and paper products.
k. 
Plants manufacturing, refining, compounding or processing fertilizer, film, herbicides, natural or synthetic rubber, pesticides, petroleum or petroleum products, pharmaceutical, radiological materials or any chemical which would be a contaminant to the public water system.
l. 
Commercial facilities that use herbicides, pesticides, fertilizers or any chemical which would be a contaminant to the public water system.
m. 
Plants processing, blending or refining animal, vegetable or mineral oils.
n. 
Commercial laundries and dye works.
o. 
Sewage, stormwater and industrial waste treatment plants and pumping stations.
p. 
Waterfront facilities including piers, docks, marinas and shipyards.
q. 
Industrial facilities which recycle water.
r. 
Restricted or classified facilities or other facilities closed to the supplier of water or the department.
s. 
Fire sprinkler systems using any chemical additives.
t. 
Auxiliary water systems.
u. 
Irrigation systems with facilities for injection of pesticides, herbicides or other chemicals or with provisions for creating back pressure.
v. 
Portable tanks for transporting water taken from a public water system.
w. 
Facilities which have pumped or repressurized cooling or heating systems that are served by a public water system, including all boiler systems.
3. 
Class II backflow hazards. The customer or the customer's authorized representative shall install, as minimum protection for Class II backflow hazards, a department-approved double-check valve assembly on the customer service line in accordance with Subsection (B)(2)(a), (c), (d), (e) when:
a. 
The supplier of water or local governmental agency (if one exists) requires protection from an actual or potential Class II backflow hazard at any facility.
b. 
Modification is made to the customer water system at an existing facility which is designated an actual or potential backflow hazard by Subsection (A)(4). If an addition or modification requiring a separate customer service line is made to an existing facility, the new service line, as well as the existing customer service line, shall be quipped with department-approved backflow prevention assemblies.
c. 
A new customer service line connection is made to a new facility which is considered an actual or potential backflow hazard by Subsection (A)(4).
4. 
Following is a list of facilities, not all inclusive, considered to be actual or potential Class II backflow hazards:
a. 
Tanks to store water from the public water system for fire fighting only, unless such tanks meet the requirements of the department for construction to maintain bacteriological quality of the water.
b. 
Fire sprinkler systems not using chemical additives; or
c. 
Cross-connections that could permit introduction of contaminants into the public or customer water system and create a nuisance, be aesthetically objectionable or cause minor damage to the public water system or its appurtenances.
5. 
Customer facilities not designated a backflow hazard by Subsection (A)(2) or (3) may be designated a backflow hazard by written notification from the supplier of water or the department to the customer. The notice shall specify the nature of the customer activity which necessitates designation of the facility as a backflow hazard, the type of backflow protection required and the date by which the customer shall install or construct this assembly on the customer service line to the facility.
6. 
The department may issue a letter exempting a customer from the requirements of Subsections (A)(1) and (3) if the customer can show to the satisfaction of the department, the local governmental authority (if one exists) and the supplier of water that the activities taking place at the customer's facility and the materials used in connection with these activities or stored on the premises cannot endanger the health of customers or degrade the water quality of the public water system should backflow occur. An exemption shall remain valid for no more than three (3) years following the date of issuance. An exemption shall be void if it is determined that the customer facility has become a backflow hazard.
B. 
Standards of Construction and Installation.
1. 
Construction. The discharge pipe of an air-gap shall terminate a minimum of two (2) pipe diameters of the discharge pipe above the flood level rim of the receiving vessel; in no case shall the distance be less than one (1) inch.
2. 
Installation.
a. 
Only those models of double-check valve assemblies and reduced pressure principle backflow prevention assemblies which are on the approved list maintained by the department are acceptable.
b. 
Reduced pressure principle backflow prevention assemblies shall be installed with no plug or additional piping affixed to the pressure differential relief valve port and with the pressure differential relief valve port a minimum of twelve (12) inches above floor level. Additionally, the assembly shall be installed at a location where any leakage from the pressure differential relief valve port will be noticed, that allows easy access to the assembly for maintenance and testing and that will not subject the assembly to flooding, excessive heat or freezing.
c. 
All double-check valve assemblies shall be installed at a location that allows easy access to the assembly for maintenance and testing and that will not subject the assembly to excessive heat or freezing.
d. 
It is the basic requirement to have backflow prevention assemblies installed on the customer water system immediately inside the wall where the customer service line enters the building. If it is not possible to install the backflow prevention assembly as described previously, then installation shall be at the approval of the department.
3. 
No bypass piping shall be allowed around a backflow prevention assembly.
C. 
Customer Responsibilities.
1. 
The customer shall furnish, install and maintain in working order at all times any backflow prevention assembly required by this rule.
2. 
To ensure that each backflow prevention assembly required by this rule is in working order, the customer shall have each assembly inspected and tested by a certified backflow prevention assembly tester at the time of construction or installation, at the following intervals and in the following manner:
a. 
Air-gaps shall be inspected each year by a date which is no later than thirty (30) days past the anniversary of the original inspection test date to ensure that they continue to meet the requirements of Subsection (B)(1).
b. 
Reduced pressure principle backflow prevention assemblies also shall be tested each year by a date which is no later than thirty (30) days past the anniversary of the original inspection test date to ensure that:
(1) 
The pressure differential relief valve operates to maintain the zone between the two (2) check valves at least two (2) pounds per square inch less than the supply pressure.
(2) 
The No. 2 check valve is leaktight against reverse flow under all pressure differentials; and
(3) 
The static pressure drop across the No. 1 check valve is at least three (3) pounds per square inch greater than the pressure differential between the supply pressure and the pressure in the zone required to open the pressure differential relief valve.
c. 
Double-check valve assemblies shall be tested each year by a date which is no later than thirty (30) days past the anniversary of the original inspection test date to ensure that both the No. 1 and No. 2 check valves are leaktight against reverse flow under all pressure differentials.
3. 
The customer shall permit access to the premises by the certified backflow prevention assembly tester, supplier of water and department 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 rule.
4. 
Those customers granted an exemption in accordance with Subsection (B)(6) of this rule shall report to the supplier of water any proposed change in process, plumbing or materials used or stored at the exempted facility at least fourteen (14) days prior to making the change. Failure to do so shall void the exemption.
D. 
Certified Backflow Prevention Assembly Tester Duties.
1. 
All backflow prevention assembly testers shall be certified through a department-approved program and be listed with the department. All certified backflow prevention assembly testers shall be recertified every three (3) years through a department-approved program. Evidence of recertification must be provided to the department for consideration to be included on a list of certified backflow prevention assembly testers made available to the public.
2. 
All certified backflow prevention assembly testers shall report to the appropriate governmental authority (if one exists), to the supplier of water, the customer and, if requested, the department the results of inspections or tests conducted in compliance with Subsection (F)(2). Reports of tests shall contain the signature of the certified backflow prevention assembly tester attesting to the compliance of the assembly with established operational requirements. Routine reports shall be submitted within thirty (30) days after making the inspection or test.
E. 
Responsibilities Of The Supplier Of Water.
1. 
Because backflow may cause a health hazard through transmission of contaminants via the public water system, the supplier of water shall remove the water meter or otherwise sever the public water supply from the customer service line serving a facility when the supplier of water:
a. 
Has knowledge that the customer is causing a cross-connection.
b. 
Has knowledge that the customer is failing or refusing to proceed without delay to correct any violation of the provisions of this rule after having been notified to do so.
c. 
Is so ordered by the appropriate local governmental authority (if one exists); or
d. 
Is so ordered by the department because of violation of any provision of this rule by the customer.
2. 
The supplier of water shall retain records of the reports of inspections, tests and repairs on Class I and Class II devices for a period of five (5) years.
3. 
The supplier of water may develop, for use within his/her service area, written procedures to implement the provisions of this rule. In developing such procedures, the supplier of water will be permitted to take into account existing backflow prevention programs and incorporate ordinances, regulations or requirements of appropriate local governmental authorities. The supplier of water may submit the procedures to the department for approval.
4. 
The supplier of water shall make record of the date of the initial inspection or test of Class I and Class II backflow prevention devices; that date shall become the annual due date for subsequent inspection or test reports submitted by the certified backflow prevention assembly tester. If subsequent reports are not received by the supplier of water on or before forty-five (45) days following this due date, the supplier of water shall promptly notify the customer, the local governmental agency (if one exists) and the department.
F. 
Responsibilities Of The Department Of Natural Resources.
1. 
All certified backflow prevention assembly tester programs shall be submitted to the department for approval. Names of persons satisfactorily completing approved certification programs will, upon request, be added to a list of certified backflow prevention assembly testers and will be made available to the public upon written request.
2. 
The department shall maintain a current list of approved backflow prevention assemblies and shall make this list available to the public upon written request.
3. 
The department shall prepare and make available on request, the appropriate forms needed to assist the supplier of water or the local governmental authority (if one exists) in the implementation of the provisions of this rule.