Ordinance - 1371•
ORDINANCE NO. 1371
AN ORDINANCE OF THE CITY COUNCIL OF THE
CITY OF WEST COVINA ADDING CHAPTER 9 TO
ARTICLE VII OF THE WEST COVINA MUNICIPAL
CODE ESTABLISHING MINIMUM REQUIREMENTS
FOR THE DESIGN AND CONSTRUCTION OF
DOMESTIC WATER SYSTEMS FOR PROPERTY IN
THE HILLSIDE (H) OVERLAY ZONE.
The City Council of the City of West Covina does ordain as
follows:
SECTION 1. Chapter 9 is hereby added to Article VII of the
West Covina Municipal Code to read as follows:
"Chapter 9. Water Standards for the Hillside
Overlay Zone
7621. PURPOSE
The purpose of this chapter is to establish minimum
requirements for the design and construction of domestic water systems
• in the undeveloped hillside areas of the City of West Covina and included
in the Hillside (H) Overlay Zone. This chapter shall apply to any
proposed development in the Hillside (H) Overlay Zone and to each incre-
ment thereof for phase development.
7622. GENERAL DESIGN AND CONSTRUCTION
(A) General. All facilities and appurtenances of the
water system shall be designed and constructed so that:
1. They can withstand, with ample safety factors, the
physical stresses to which they are likely to be subjected,
2. They are free of structural and sanitary hazards,
3., They are of adequate size and capacity in order to
meet minimum presssure requirements specified in -Paragraph (C)`.-
(B) Quantity of Supply.
1. The quantity of water available from all of the water
sources and distribution storage reservoirs shall be sufficient to supply
adequately, dependable, and safely the total requirements of all customers
under maximum demand conditions. The serving water utility shall certify
to the City Council of the City of West Covina as to the adequacy of the
• available water supply. Such certification shall contain statements con-
cerning the source of water, adequacy of transmission system to the area
to be served, adequacy of storage capacity and any other statements that
may be deemed necessary by the City Council. Maximum customer requirement
may be determined from adequately supported and documented system record
•or by Chart 1. The flow requirement indicated on Chart 1 is for average
demands not including fire flow. This flow shall be appropriately supple-
mented, as required by the Fire Department of the City of West Covina to
take into consideration such factors as climate, community type, kinds of
customers, and past experience. This flow shall be available contin-
uously for at least two hours, one third must be provided from the water
source and the remainder may be provided from distribution storage.
2. A master meter, or other suitable measuring device,
shall be provided for each source of water supply.
(C) System Pressure.
1. Normal operating pressure at the service connection
shall not be less than 25 pounds per square inch guage (p.s.i.g.) nor more
than 125 p.s.i.g., except that during periods of hourly maximum demand at
the time of peak seasonal loads the pressure may not be less than 20 p.s.i.g.
and that during periods of hourly minimum demand the pressure may be not
more than 150 p.s.i.g. Variations in pressures under normal operation
shall not exceed 50 percent of the average operating pressure. The average
operating pressure shall be determined by computing the arithmetical
average of at least 24 consecutive hourly pressure readings.
2. If the enforcement of the foregoing pressure
regulations would result in undue hardship in supplying customers
at widely varying elevations, the utility may make application to
• the City Council for an exception from these provisions in the
following manner:
(a) Written application shall be filed with the
City Council.
(b) The application shall include all information
necessary to properly apprise the City Council
of the circumstances existing which require the
exception. A copy of the application shall be
forwarded to the City Engineer for his report
and recommendation.
(c) Within thirty days after the filing of the appli-
cation, the City Council shall conduct a hearing
thereon and may approve, amend and approve, or
deny the application.
The City Council shall only approve an exception where full compliance
with the foregoing pressure regulations is impractical or unreasonable
based upon current engineering practice and the public health, safety,
and welfare would be served'by granting such exception.
No exception approved by the City Council pursuant to this paragraph
shall be effective for any purpose until the exception has been incor-
porated in a covenant running with the land to which the exception
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applies and the covenant is approved by the City Attorney as to form
and recorded in the office of the County Recorder of the County of
• Los Angeles.
3. New water systems, or new pressure zones in existing
water systems supplying customers at substantially constant elevation
shall be designed to maintain an operating pressure at the service
connection of not less than 35 p.s.i.g. nor greater than 125 p.s.i.g.
4. Where the pressure in the mainline exceeds 80
p.s.i.g. an approved type pressure regulator preceded by an adequate
strainer shall be installed at each house and the pressure reduced to
a maximum of 80 p.s.i.g.
7623. WATER SYSTEM FACILITIES
(A) Wells.
0
For systems with approved well sources, additional
wells shall be constructed in accordance with all local and State
regulati6ns. Proposed well sites shall be investigated to determine
the distance from sewage collection and disposal facilities, and any
hazards therefrom shall be eliminated prior to well construction. If
wells are a new source of supply, application shall be made to the State
Department of Health for a new or amended permit.
(B) Storage Reservoirs.
• reservoirs and tanks from which water is delivered
directly into the mains of a distribution system shall be adequately
protected against pollution and shall be covered. Drains and overflows
shall not be directly connected to sewers or storm drains without
gradient breaks guaranteeing that no backflow can occur.
•
(C) Pumping Plants.
Booster pumping plants shall be designed by a pro-
perly qualified and licensed engineer or similarly qualified individual,
except for minor modifications or planned additions.
(D) 'Security.
All operating facilities shall be protected
against unauthorized entry and vandalism.
7624. DISTRIBUTION SYSTEM REQUIREMENTS
(A) Length of Run.
The maximum length of run of each size of pipe shall
be determined by a pressure and flow analysis to be submitted to the
City Engineer, and shall be designed by a properly qualified and
licensed engineer or similarly qualified individual to meet
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the requirements of Section 7622 of this chapter. The minimum
size pipe allowed shall be 8 inches except on cul-de-sac streets
• where no fire hydrant is to be served, in such case the minimum
size allowed shall be 6 inches.
2. All dead end runs shall be provided with a means of
flushing to prevent deterioration of water quality.
(B) Design.
Pipelines having a nominal inside diameter greater
than 12 inches shall be designed by and installed under the general
supervision of a properly qualified licensed engineer or similarly
qualified individual. Pipelines having a diameter of 12 inches
or less shall meet the applicable standards shown in Table I.
TABLE I
PIPE STANDARDS
American Water
American Soc. for
Federal
Works Association
Testing Material
Specs.
Asbestos -Cement
C400-73
C296-72T
SS-P-35lb
Cast Iron
C106-75
WW-P-421b
C108-75
Ductile Iron
C151-76
Steel
C201-66
SS-P-385a
C202-64
Copper
C800-66
B88-58
WW-T-799b
Concrete
C300-74
SS-P-381a
C301-72
C302-74
Plastic ABS
D2282-65
CS270-65
PE
D2239-65
CS255-63
PVC
D2241-65
PS 22-70
PB
D2662-67
(C) Asbestos -Cement Pipe.
Asbestos -cement pipe shall be selected in accord-
ance with AWWA Standard C401-77 "Standard Practice for the Sel-
ection of Asbestos -cement Water Pipe," and shall be installed in
accordance with AWWA Standard C603-65.
(D) Cast Iron Pipe.
Cast iron pipe shall be selected in accordance with
AWWA Standard C 101-67and shall be installed in accordance with
AWWA Standard C600-77. Cast.iron pipe shall be cement mortar lined.
(E) Ductile Iron Pipe.
Ductile.iron pipe shall be selected in accordance
• with AWWA Standard C150-76 "American Standard for the Thickness
Design of Ductile Iron Pipe." and shall be installed in accord-
ance with AWWA Standard C600-77. Ductile iron pipe shall be
cement mortar lined.
(F) Plastic Pipe.
Plastic pipe and couplings shall be approved by the
National Sanitation Foundation and listed in the N.S.F. Manual
"Plastic Materials, Pipe, Fittings and Appurtenances for Potable
Water Supplies". Pipe shall be installed according to man-
ufacturer's recommendation_ and care shall be observed not to
damage pipe with backfill material. The pressure rating of all
plastic piping components for water service at 73.4 degrees
Fahrenheit shall not be less than the sum of the maximum static
pressure and a special allowance for surge pressure. The
static design pressure shall be the actual static pressure, and
in no case shall it be less than 100 p.s.i.g. The special
allowance for surge pressure shall be at least equal to the
maximum anticipated surge pressure, but the allowance shall not
be less than 120 p.s.i.g. for pipe sizes 4 inches through 10
inches and not less than 110 p.s.i.g. for 12 inch pipe. The
minimum wall thickness requirement for pipe shall be calculated
on the basis of a system design pressure which complies with the
above provisions. The wall thickness of fittings shall be
adequate to withstand internal pressures equal to or greater than
that of the pipe component of the joint.
• (G) Steel Pipe.
1. Steel pipe shall be selected and installed in
accordance with AWWA Manual M-11 (1964) "Steel Pipe -Designed
and Installation." Design shall comply with Sections 6.1 and
6.2 of Manual M-11, except that minimum allowable steel thick-
ness shall be 0.075 inches (14 gauge). The minimum design pressure
shall be at least the maximum anticipated system pressure, but in
no case shall be less than 160 p.s.i.g.
2. All steel pipe shall be adequately protected
from internal and external corrosion. Table 2 lists various
protective coatings and linings. The selection of the appropriate
coating or lining system shall be made by a properly qualified
licensed engineer or based on satisfactory experience with a
particular coating in the same or similar environment as that
being considered. Cathodic protection installations shall be
designed and installed under the direction of a properly qualified
and licensed engineer or similarly qualified individual.
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•
TABLE II
STEEL PIPE COATINGS AND LININGS
Coatings
Cement -Mortar Coated
Coal Tar Coated &
Wrapped
Asphalt Mastic
Extruded Plastic Coating
Linings
Cement Mortar Lining
Coal Tar Lining
(H) Service Connection.
Specification
AWWA C205-71 or Federal
Spec. SS-P-385a
AWWA C203-73
Asphalt Instit. M-2 CS-96
Federal Spec. L-C-00530
AWWA C205-71 or Federal
Spec. SS-P-385a
AWWA C203-73
Service pipe and fittings shall be designed for
cold water working pressure of not less than 150 p.s.i.g.
Cooper tubing shall be commercial designation type K or L.
Plastic tubing shall bear the approval and marking of the
National Sanitation Foundation.
(I) valves.
• 1. Gate valves shall.conform to the.American
Water Works Association Standard Specification C500-71 for
double disc type.
2. Butterfly valves shall meet or exceed the
American Water Works Association Standard Specification C504-74
for rubber seated valves.
(J) Pits.
Chambers or pits containing vacuum or air -
relief valves shall be protected against.flooding. Drains shall
not be directly connected by pipe or other closed conduit to.
sewers or storm drains.
(K) Joints.
Pipe joints and appurtenances of all types shall
safely withstand the same working pressures for which the pipe
is designed. Where backup gaskets are required, rubber or
asbestos shall be used.
(L) Mains Installation.
• 1. Water mains shall be installed below the frost
line or be otherwise protected to prevent freezing and shall
not have less than 36 inches of cover over the top of the pipe
in public streets or alleys except where it is necessary to avoid
underground obstructions or rocky or hardpan conditions where
• such.depth is not feasible.
2. Water pipes shall be laid at least 10 feet horizon-
tally from and at a higher level than sanitary sewers, ,
3. All pipe or conduits, before being placed in service,
shall be disinfected according to the American Water Works Assoc-
iation Standard Specification C601-68 for disinfecting water mains.
Water'samples shall be collected from new or repaired pipe for bac-
teriological examination following disinfection..
(M) Fire Hydrants.
1. Fire hydrants shall conform to AWWA Standard Speci-
fication C503-75 for Wet -Barrel Fire Hydrants and be Jones J-3700
type or approved equal.
2. Location of Fire Hydrants shall be as specified
by City of West Covina Fire Department.
7628 DESIGN CRITERIA
(A) Consumption Rates.
The consumption rates for the design of the system
shall be as follows:
• Population based upon 3.2 persons per household
Average day consumption - 230 gal/capita
Maximum day consumption 460 gal/capita
Peak hour rate I.g.p.m..pet. person
(B) Fire Flow.
The fire flow requirements for this area shall be:
2,000 gallons per minute for two hours. Area to be served by a
single fire hydrant is 150,000 square feet.
•
SECTION 2." The City Clerk shall certify to the passage of
this ordinance and shall cause the same to be published as required
by law.
ATTEST:
Passed and approved this 27th day of February 1978.
Mayor
City Clerk
STATE OF CALIFORNIA )
COUNTY OF LOS ANGELES ) SS.
CITY OF WEST COVINA )
I, LELA W. PRESTON, City Clerk of the City of West Covina, do
hereby certify that the foregoing Ordinance No. 1371 was regularly
introduced and placed upon its first reading at a regular meeting of
the City Council on the 13th day of February , 1978. That,
thereafter, said ordinance was duly adopted and passed at a regular
meeting of the City Council on the 27th day of February ,
1978, by the following vote, to wit:
AYES: Councilmen: Miller, Chappell, Browne, Tice, Shearer.
NOES: Councilmen: None
ABSENT: Councilmen: None
APPROVED AS TO FORM:
• City Attorney
City Clerk
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