Ordinance 1992-08ORDINANCE NO. 92 - 8
AN ORDINANCE OF THE CITY OF GILROY UPDATING CHAPTER 27, ARTICLE V OF THE
GILROY CITY CODE PERTAINING TO WATER SYSTEM BACKFLOW PREVENTION AMENDING
SECTIONS 27.84 (d)
WHEREAS, the Director of Public Works has requested amendment to the
Water System Backflow Prevention Ordinance so as to further protect the purity of
water in the City of Gilroy, and good cause appearing therefore,
NOW, THEREFORE, THE CITY COUNCIL OF THE CITY OF GILROY DOES ORDAIN
AS FOLLOWS:
SECTION I. Sections 27.84 (d) is hereby amended to read as follows:
Sec. 27.84 General requirements.
Fire systems. A fire-fighting system with a direct connection to
the public potable water system should be protected in a manner
commensurate with the hazard. Fire protection systems may be
classified as follows:
(s)
Class I: Direct connections from domestic water mains only; no
pumps or reservoir; no physical connection from other water
suppliers; no anti-freeze or other additives of any kind; and all
sprinkler drains discharging to atmosphere, dry wells, or other safe
outlets.
(2)
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 water supply. It is necessary,
however, to avoid drafting so much water that pressure in the water
main is reduced below 10 psi.)
(3)
Class III: Direct connection from public water supply main plus one
or more of the following: Elevated storage tanks; fire pumps taking
suction from above-ground covered reservoirs or tanks; or pressure
tanks. Ail storage facilities are filled or connected to public
water only; the water in the tanks to be maintained in a potable
condition.
(4)
Class IV: Directly supplied from public mains similar to Classes I
and II, connection for fire pumper truck or with an auxiliary water
supply on or available to the premises.
(5)
Class V: Directly supplied from public mains and interconnected
with auxiliary supplies, such as: pumps taking suction from
reservoirs exposed to contamination or from rivers and ponds; driven
wells; mills or other industrial water system; or system where
antifreeze or other additives are used.
(6)
Class VI: Combined industrial and fire protection systems supplied
from the public water mains only, with or without gravity storage or
pump suction tanks.
Class I and II fire protection systems will not require backflow
protection at the service connection.
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ORDINANCE NO. 92 - 8
Class III systems should be provided with minimum protection (approved
double check valves) to prevent contaminated waters from backflowing in the public
potable water system.
Class IV systems should be provided with a minimum of a DC at the service
connection. An AG or RP may be required depending on the quality of the auxiliary
supply.
Class V systems should be provided with maximum protection (AG or RP) to
protect the public potable water system.
Class VI system protection depends on the requirements of both industry
and fire protection and could only be determined by a survey of the premises.
A meter (compound, detector check) should not be permitted as part of a
backflow protection device. An exception may be made, however, if the meter and
backflow preventer are specifically designed and approved for that purpose.
(e) Use of fire hydrants. The city allows the use of water directly
from fire hydrants for flushing storm and sanitary sewers and similar uses. When
this is permitted, it is mandatory that a portable RP be provided by the user to
protect the city water system.
SECTION II. Ail other ordinances and parts of ordinances in conflict
herewith are hereby repealed.
SECTION III. This ordinance shall take effect and be in full
force thirty (30) days from and after its adoption and approval.
PASSED AND ADOPTED this 6th day of July, 1992 by the following vote:
AYES:
NOES:
COUNCILMEMBERS: GILROY, HALE, KLOECKER, NELSON, ROWLISON, VALDEZ
and GAGE.
COUNCILMEMBERS: None
ABSENT:COUNCILMEMBERS: None
APPROy.~D:
Mayor
ATTE ST:
~ Ci~ty Clerk [__
ORDINANCE NO. 92 - 8
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I, SUSANNE E. STEINMETZ, City Clerk of the City of Gilroy, do
hereby certify that the attached Ordinance No. 92-8 is an original
ordinance, duly adopted by the Council of the City of Gilroy at a regular
meeting of said Council held on the 6th day of July , 19 92 ,
at which meeting a quorum was present.
IN WITNESS WHEREOF, I have hereunto set my hand and affixed the
Official Seal of the City of Gilroy this
19 92.
City Clerk df the City of Gilr~
(Seal)
2nd day of June