2500 Planning - Graywater Standards?7,i(144,giff-
MATTERS FROM MEMBERS OF THE CITY COUNCIL
Mayor Pro Tern Hill commented on the County Sanitation Districts' plans for the future use of
recycled water in the South Bay. A suggestion was offered that recycled water to be used for
irrigation or other non -potable uses could be delivered to homes via trucks at a lesser cost.
Comments ensued regarding the use of gray water and wind generated energy.
Councilmembers further commented about the topic of green (environmentally sensitive)
buildings and suggested that this item be agendized for a future discussion on how the zoning
code could be modified to support the greening of the City. It was suggested that the topic
should also include a discussion of alternative energy y as well
as the use of reclaimed and
recycled water.
00
PROPOSED ORDINANCE NO. 250: AN ORDINANCE OF THE CITY OF ROLLING
HILLS ADOPTING BY REFERENCE, APPENDIX J (GRAYWATER STANDARDS)
OF THE STATE PLUMBING CODE, 1994 EDITION, AND AMENDMENTS
THERETO, ADOPTING THE LOS ANGELES COUNTY PLUMBING CODE, TITLE 28,
AND AMENDMENTS THERETO, AND AMENDING PORTIONS OF CHAPTER
15.08 OF THE ROLLING HILLS MUNICIPAL CODE.
City Manager Nealis presented the staff report. Mayor Pernell opened the public hearing
and called for testimony. Hearing none, Mayor Pernell closed the public hearing and
called for a motion.
Mayor Pro Tem Murdock moved that the City Council waive further reading and adopt
Ordinance No. 250. Councilmember Heinsheimer seconded the motion which carried by
the following roll call vote:
AYES: Councilmember Heinsheimer, Hill, Lay, Mayor Pro Tem Murdock and Mayor
Pernell.
NOES: None.
ABSENT: None.
ABSTAIN: None.
PUBLIC HEARINGS
PROPOSED ORDINANCE NO. 250: AN ORDINANCE OF THE CITY OF ROLLING
HILLS ADOPTING BY REFERENCE, APPENDIX J (GRAYWATER STANDARDS)
OF THE STATE PLUMBING CODE, 1994 EDITION, AND AMENDMENTS
THERETO, ADOPTING THE LOS ANGELES COUNTY PLUMBING CODE, TITLE 28,
AND AMENDMENTS THERETO, AND AMENDING PORTIONS OF CHAPTER
15.08 OF THE ROLLING HILLS MUNICIPAL CODE.
City Manager Nealis presented the staff report. Mayor Pernell opened the public hearing
and called for testimony. Hearing none, Mayor Pernell called for a motion.
Mayor Pro Tern Murdock moved that the City Council waive further reading and
introduce Ordinance No. 250. Councilmember Heinsheimer seconded the motion which
carried unanimously. Hearing no objection, Mayor Pernell continued the public hearing
to the next regularly scheduled meeting of the City Council to be held on Monday, August
14, 1995.
Councilmembers discussed the graywater standards as it relates to discharge from
dishwashers and laundry water.
City Manager Nealis expressed appreciation to Principal Planner Ungar for the outstanding
job done in preparing the staff materials related to this Ordinance.
REPORT REGARDING GREY WATER USES AUTHORIZED BY CHAPTER 14 OF THE
COUNTY PLUMBING CODE.
V�\ City Manager Nealis presented the staff report.
• Mr. Jim Fry, Head of the Los Angeles County Mechanical and Plumbing Section, addressed the
Council regarding the County's experiences with Chapter 14 of the Plumbing Code. Mr. Fry
stated that since Chapter 14 has been in effect, no permits have been issued. He indicated that
this is probably due to cost factors.
Councilmembers agreed that grey water systems may be useful in Rolling Hills because of the
benefit of reducing water introduced into septic systems and that this type of water could be used for irrigation
systems. Councilmembers discussed the County Code with Mr. Fry and expressed concern that
the County Code would not address certain unique local conditions.
After reviewing the report, comments from the City Attorney and further discussion, the City
Council directed staff to further research this issue, review Chapter 14 of the County Plumbing
Code and draft an Ordinance that meets the unique needs of the City of Rolling Hills.
ORDINANCE NO. 250
,N ORDINANCE OF THE CITY ( LOLLING HILLS
ADOPTING BY REFERENCE APPENDIX J (GRAYWATER
STANDARDS) OF THE STATE PLUMBING CODE, 1994
EDITION, AND AMENDMENTS THERETO, ADOPTING THE
LOS ANGELES COUNTY PLUMBING CODE, TITLE 28, AND
AMENDMENTS THERETO, AND AMENDING PORTIONS OF
CHAPTER 15.08 OF'THE ROLLING HILLS MUNICIPAL CODE.
THE CITY COUNCIL OF THE CITY OF ROLLING HILLS DOES HEREBY
ORDAIN AS FOLLOWS:
Section 1. Section 15.08.010 of Chapter 15.08 of Title 15 of the Rolling Hills
Municipal Code is amended to read:
"15.08.010 Adoption of Plumbing Code by reference.
A. Except as hereinafter provided, Chapters 1 through 13 and Appendices
A, B, C, D, I, and j of that certain Plumbing Code known and designated as the "Uniform
Plumbing Code, 1991 Edition," prepared by the International Association of Plumbing and
Mechanical Officials, and further amended May 1, 1994, and Title 28, Plumbing Code of the
Los Angeles County Code, as amended and in effect on November 29, 1992, are hereby
adopted by reference. Except for Chapter 14 of Title 28, Title 28 shall control over any
conflict with said Uniform Plumbing Code, 1991 Edition. Sections 15.08.020, et seq., of
Chapter 15.08 of Title 15 of the Rolling Hills Municipal Code are hereby readopted. The
above -mentioned codes or portions of codes, amendments and sections which are hereby
adopted shall constitute and may be cited as the Rolling Hills Plumbing Code.
B. A copy of the Uniform Plumbing Code, 1991 Edition, Title 28 and
Chapter 15.08 of Title 15 of the Rolling Hills Municipal Code have been deposited in the
office of the City Clerk of the City of Rolling Hills and shall be at all times maintained by
the Clerk for use and examination by the public."
Section 2. Section 15.08.025 of Title 15 is hereby amended by adding the
.following Subsection (BB) to read as follows:
"BB. Amendments to Appendix T. Notwithstanding the provisions of
Section 1 of this Ordinance, Appendix J of the Plumbing Code is amended as follows:
1. Section J -1(i) is added to read as follows:
(i) Where a graywater system is to be installed as part of the
construction of a new single family dwelling or in connection with any
remodeling of a single family dwelling, an accessible three-way valve and,
where required, plumbing stub out that allows diversion of graywater from a
clothes washer to either a graywater system or a sewer may also be installed.
2. Section J -9(e) is amended by adding the following sentence to the end
of that subsection: "If the surge tank is below the septic tank outlet, a pump to
lift the .graywater up to the septic tank inlet and an overflow alarm system
may be installed in lieu of the drain and overflow pipe required by this
Section J -9(e)."
3. Section J-11 is amended to add Subsection (a)(8) to read as follows:
"8. When drip irrigation lines are installed on sloping ground, the
lines shall be installed with the contours of the slope, and stepped down the
slope, as required. The connection lines between each horizontal leaching
section shall be water tight."
4. Section J -11(b)(1) is amended to read as follows:
"1. Perforated sections shall be a minimum 3 -inch diameter
or 1-1/2 inch diameter slotted effluent pipe and shall be constructed of
perforated high density polyethylene pipe, perforated ABS pipe, perforated
PVC pipe, or other approved materials, provided that sufficient openings are
Ordinance No. 250 -1-
available for distribution of the g*•rvater into the trench area. Material
construction and perforation of tl ping shall be in compliance with,ths
appropriate absorption field drainage piping standards and shall be approved
by the Administrative Authority. Perforated flex pipe with perforation on all
sides is prohibited."
5. Section J -11(b)(2) is amended by adding the word "round" between
"stone," and "gravel" in the first sentence.
6. Section J-11 is amended to add Subsection (b)(4) to read as follows:
"(4) When mini-leachfield lines are installed on sloping
ground, the lines shall be installed with the contours of the slope, and stepped
down the slope, as required. The connection lines between each horizontal
leaching section shall be watertight."
7. Section J -12(a) is amended by adding the following sentence at the end
of that subsection:
"The Building Official may approve a demonstration system upon
determination that the system provides substantially equivalent health and safety
protection to a system conforming to Appendix J. The Building Official may impose
any reasonable and necessary conditions on the approval of a demonstration
system."
8. Section J-14 is added to read as follows:
"Section J-14 Landslide Areas.
Notwithstanding the provisions of this Appendix J, as amended, the
Building Official may waive the requirements of this Code where special conditions,
including, but not limited to, type of soils and lot configuration, warrant such
changes for homes located in landslide areas. Such waivers are limited to the
requirements which are impractical or counter -indicated given the particular
circumstances of the lot."
9. Section J-15 is added to read as follows:
"Section J-15 Graywater Information Handbooks.
Informational handbooks, which may also include implementing
regulations, consistent with Appendix J of the Rolling Hills Plumbing Code, as
amended shall be at all times available at the public counter."
Section 3. The City Council finds:
A. Gray water systems used for landscape irrigation would be
advantageous to the residents of the City of Rolling Hills. The majority of homes use a
septic tank disposal system in which sewage and waste water is drained into a buried tank
that leaches out into one concentrated area of a lot. With a graywater system, a portion of
that waste water, graywater, would be dissipated throughout a broad expanse of
landscaping on a lot. Using graywater would save the homeowner and the water district
both water and costs, especially during times of drought. The County specifications are
planned to make it easy for homeowners to comply with requirements using common
plumbing materials and logical specifications for health and safety.
B. Modifications to the Plumbing Code that permit graywater systems are
reasonable because of local climate, characterized by hot, dry summers, followed by strong
Santa Ana winds and heavy winter rains which make structures particularly vulnerable to
rapidly spreading wind driven fires and earth movement. These conditions have been
further complicated by intermittent drought conditions. The City contains irregular -
shaped lots that are located in hilly areas. Terrain contains natural canyon shrubbery as
well as a great deal of landscaping. The City has a complex geology that consists of
landslide areas that have been identified by the United States Geologic Survey. There are
extreme fire hazards in late summer and early fall that create an exceptional need to
Ordinance No. 250 -2-
irrigate fire-resistant plants. There are earth movement hazards, including soil creep and
hilislope r movements which emphasize the imp( ce of near surface disposal by
evapo-trar,.t,..ation. The reuse of all types of waste w .._. for the prevention of any deep
percolation below the root zone of grasses, shrubs and trees is also advantageous.
Therefore, the use of graywater systems would conserve water through reuse, encourage
landscaping to reduce fire hazards, preserve resources during drought conditions, and
reduce demand on septic systems.
Section 4. This ordinance adopts, like the County ordinances, the Uniform
Code as approved by code writing organizations, the amendments to those codes adopted
by agencies of the State of California upon the incorporation of those codes into the
California Building Standards Code, and the local amendments stated in this ordinance.
In so doing, this ordinance adopts and amends the applicable provisions of the California
Building Standards Code as required by Health & Safety Code Section 18941.5.
Section 5. Except as herein amended, Chapter 15.08 of Title 15 of the
Rolling Hills Municipal Code shall remain in full force and effect.
PASSED AND ADOPTED ON THE 14th DAY OF AUGUST, 1995.
ATTEST:
•
MARILYN K RN
DEPUTY CITY CLERK
STATE OF CALIFORNIA
COUNTY OF LOS ANGELES
CITY OF ROLLING HILLS
EY PERNEH D D.S.
MAYOR
SS
I certify that the foregoing Ordinance No. 250 entitled:
AN ORDINANCE OF THE CITY OF ROLLING HILLS
ADOPTING BY REFERENCE APPENDIX J (GRAYWATER
STANDARDS) OF THE STATE PLUMBING CODE, 1994
EDITION, AND AMENDMENTS THERETO, ADOPTING THE
LOS ANGELES COUNTY PLUMBING CODE, TITLE 28, AND
AMENDMENTS THERETO, AND AMENDING PORTIONS OF
CHAPTER 15.08 OF THE ROLLING HILLS MUNICIPAL CODE.
was approved and adopted at a regular meeting of the City Council on August 14, 1995 by
the following roll call vote:
AYES: Councilmembers Heinsheimer, Hill, Lay, Mayor Pro Tem Murdock
.and Mayor Pernell.
NOES: None.
ABSENT: None.
ABSTAIN: None.
and in compliance with the laws of California was posted at the following:
Administrative Offices
DEPUTY CITY CLERK
Ordinance No. 250 -3-
CITY OF ROLLING HILLS
PROOF OF SERVICE BY MAIL AND POSTING
STATE OF CALIFORNIA
SS
COUNTY OF LOS ANGELES
I am a citizen of the United States. I am over the age of eighteen years and not a party to
the within proceeding; my business address is 2 Portuguese Bend Road, Rolling Hills,
California.
On the /5.13 day of p -t,„5_„,,?—, ,1995
Iservethewithin to„�1�, �
a copy of which is annexed hereto and made a part hereof, on the person, or persons,
named below by placing a true copy thereof enclosed in a sealed envelop with postage
thereon fully prepaid, in the United States mail at Rolling Hills, California addressed as
follows: -
FAXED MAILED DELIVERED
Also posted at City Hall.
I certify (or declare) under penalty of perjury, that the foregoing is true and correct.
Executed on the /5- day of ia,,5,,,
, 1995 at Rolling Hills, California.
MARILYN L. KERN
DEPUTY CITY CLERK
INCORPORATED JANUARY 24, 1957
NO. 2 PORTUGUESE BEND ROAD
ROLLING HILLS, CALIF. 90274
(310) 377.1521
Agenda Item No.: 6A FAX: (310) 377 7288
Mtg. Date: 8/14/95
HEARING DATE: AUGUST 14, 1995
TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL
ATTENTION: CRAIG R. NEALIS, CITY MANAGER
FROM: LOLA M. UNGAR, PRINCIPAL PLANNER
SUBJECT: PUBLIC HEARING
PROPOSED ORDINANCE NO. 250: AN ORDINANCE OF
THE CITY OF ROLLING HILLS ADOPTING BY
REFERENCE APPENDIX J (GRAYWATER STANDARDS)
OF THE STATE PLUMBING CODE, 1994 EDITION, AND
AMENDMENTS THERETO, ADOPTING THE LOS
ANGELES COUNTY PLUMBING CODE, TITLE 28, AND
AMENDMENTS THERETO, AND AMENDING
PORTIONS OF CHAPTER 15.08 OF THE ROLLING HILLS
MUNICIPAL CODE.
BACKGROUND
At the July 24, 1995 meeting, the City Council introduced the proposed ordinance
that establishes Graywater Standards for the City of Rolling Hills.
Graywater is untreated household waste water which has not come into contact
with toilet waste. Graywater includes used water from bathtubs, showers, bathroom
wash basins, and water from clothes washing machines and laundry tubs. It shall
not include waste water from kitchen sinks, dishwashers or laundry water from
soiled diapers.
We have attached relevant materials from the previous hearing.
RECOMMENDATION
It is recommended that the City Council, open the public hearing, review the
ordinance, take public testimony, and adopt Ordinance No. 250.
®Panted on Recycled Paper.
City opeoffin
INCORPORATED JANUARY 24, 1957
HEARING DATE: JULY 24, 1995
TO:
NO. 2 PORTUGUESE BEND ROAD
ROLLING HILLS, CALIF. 90274
(310) 377-1521
Agenda Item No.: 7A FAX: (310) 377-7288
Mtg. Date: 7/24/95
HONORABLE MAYOR AND MEMBERS OF THE CITY
COUNCIL
ATTENTION: CRAIG R. NEALIS, CITY MANAGER
FROM: LOLA M. UNGAR, PRINCIPAL PLANNER
SUBJECT: PROPOSED ORDINANCE NO. 250: AN ORDINANCE OF
THE CITY OF ROLLING HILLS ADOPTING BY
REFERENCE APPENDIX J (GRAYWATER STANDARDS)
OF THE STATE PLUMBING CODE, 1994 EDITION, AND
AMENDMENTS THERETO, ADOPTING THE LOS
ANGELES COUNTY PLUMBING CODE, TITLE 28, AND
AMENDMENTS THERETO, AND AMENDING
PORTIONS OF CHAPTER 15.08 OF THE ROLLING HILLS
MUNICIPAL CODE.
BACKGROUND
Attached is a draft ordinance prepared with the assistance of Mr. Kevin Ennis,
Assistant City Attorney, that adopts and amends the State's Graywater Standards of
the Uniform Plumbing Code specifically for the City of Rolling Hills. Staff reviewed
the City of Malibu's graywater ordinance and incorporated important features that
are consistent with the City of Rolling Hills' particular needs. The City Council
should note that the City of Malibu's ordinance is more stringent in that it requires
that all new single family residences and all renovations install dual plumbing to
allow and facilitate the installation of a graywater system. The Rolling Hills draft
ordinance permits dual plumbing that allows and facilitates the installation of a
graywater system.
Graywater is untreated household waste water which has not come into contact with
toilet waste. Graywater includes used water from bathtubs, showers, bathroom wash
basins, and water from clothes washing machines and laundry tubs. It shall not
include waste water from kitchen sinks, dishwashers or laundry water from soiled
diapers.
ORDINANCE NO. 250
PAGE 1 OF 5
®Primed on Recycled Paper.
Staff conferred with Mr. Jim Fry, Chief Plumbing and Mechanical Inspector, Building
and Safety Division of the Los Angeles County Mechanical & Plumbing Section of
the Department of Public Works, and Ms. Lata Thakar, District Engineer, Lomita
Office, Building and Safety Division of the Department of Public Works, regarding
the permitting of construction of graywater systems for landscape irrigation in the
City of Rolling Hills.
PROPOSED CHANGES TO STATE STANDARDS
Section 2 of the proposed ordinance lists the differences or amendments between the
City and State ordinances. All City changes are based on local climatic, topographical,
or geological conditions as follows:
Section J -1(i): All new single family residences permitted after the effective date of
the ordinance would be allowed to install dual plumbing to allow and
facilitate the installation of a graywater system. Staff estimates the cost
for such additional plumbing lines to not be significant.
All renovations to and/or replacement of applicable plumbing fixtures
and plumbing systems in existing single family dwellings that are
permitted after the effective date of this ordinance would be allowed to
include dual plumbing lines to facilitate the installation of a graywater
system. Staff estimates the cost for such additional plumbing to be
minimal. The City may disallow a graywater system if it would
adversely impact a geologically sensitive area.
Section J -9(e): An option has been added to install an overflow alarm and pump
when the graywater surge tank can only be installed lower than the
septic tank. This is a requirement based on local topographical
conditions of irregular land surface and hillside lots, particularly for
graywater installations for existing single family dwellings. Chief
Inspector Fry says that when the surge tank is below the septic tank, a
pump must be provided to pump the effluent up to the septic tank or
else the effluent would back up into the house or if the overflow were
open to the atmosphere then the effluent would spill out on the ground
surface which is not permitted.
Section J -11(a)(8): This amendment allows drip irrigation lines to be installed to
follow the existing contours based on local topographical conditions of
irregular land surface and hillside lots.
Section J -11(b)(1): This amendment allows a reduced standard size minimum pipe
diameter but it restricts it to slotted pipe rather than perforated (round
holes) pipe. The prohibition of fully perforated pipe is a more stringent
requirement. (Fully perforated pipe when curved would allow water to
ORDINANCE NO. 250
PAGE 2 OF 5
continue to flow in the same direction prior to the curve). Chief
Inspector Fry says that should any solids inadvertently get into the
system, a small diameter pipe will plug up much faster than a larger
pipe. Also, a larger pipe is much easier to clean out than a small one.
Section J -11(b)(2): This amendment is more stringent than the State code by
requiring round gravel. However, this amendment will increase the
effectiveness of the mini -leach field.
Section J -11(b)(4): This amendment allows mini -leach field lines to be installed to
follow the existing contours based on local topographical conditions of
irregular land surface and hillside lots.
Section J -12(a): This amendment is based on the authority already given the
Building Official under City Plumbing Code Section 201(k) for
equivalent protection to health and safety and Appendix I Section 1 (i)
alternative or demonstration systems. All such demonstration systems
must be equivalent to Appendix J as amended and/or as restrictive as
the State ordinance.
Section J-14: This amendment is specifically based on the physical constraints of
installing a graywater system in a landslide area and waives
requirements under certain conditions, especially where the dwelling
exists and a private disposal system has been installed. This
amendment is based on local topographical conditions of irregular land
surface and hillside lots.
County representatives are in agreement that a graywater system is even
advantageous in the Flying Triangle Active Landslide Area.
There will be 'no additional plumbing permit fee for dual plumbing fixtures, the
charge will be $11.00 per fixture, just as for any other plumbing fixture. The cost of a
plumbing permit for a graywater system for a proposed or an existing residence will
be $360.50 for plan check and permit fees for Rolling Hills property owners.
The County Building and Safety Department will be responsible for the permitting
and inspection of graywater systems. Enforcement of the ordinance for illegal,
unpermitted systems will also be the responsibility of the Building and Safety
Department. Any health concerns with graywater systems remain the responsibility
of the County Health Department.
A handbook published by the State Department of Water Resources and the City
ordinance will be available at the counter at City Hall to educate the public and assist
both owners and professionals who desire to legalize existing unpermitted systems
and install new systems.
COMMON QUESTIONS AND ANSWERS
Additional permits:
ORDINANCE NO. 250
PAGE 3 OF 5
An ordinary plumbing permit is the only required permit.
Minimum earth coverage:
Section J -11(b)(3) requiring a minimum 9 inches of earth cover has not been
specifically amended. However, Section J-11 allows the Building Official to
"permit equivalent irrigation methods which discharge graywater in a
manner which ensures that graywater does not surface." This section in
conjunction with J -12(a) allows the Building Official to review and approve
other systems such as sub -irrigated mulch trenches, dosed or pumped systems,
the substitution of drip irrigation for gravity irrigation, and other custom
designed irrigation systems as equivalent irrigation methods. Also, reduced
earth coverage for lines installed in segregated or remote landscape areas may
also be reviewed and approved as equivalent systems provided the discharged
graywater does not surface.
Vegetable gardens and fruit trees:
Section J -13(e) has not been amended. Graywater may not be used for
vegetable gardens or fruit trees.
Percolation tests:
A percolation test is already a standard requirement for private sewage
disposal design and installation for new single family construction and the
L.A. County Health Department files contain percolation test records for
existing dwellings. A percolation test for a graywater system would require the
same standard. Percolation tests minimum square feet of irrigation area per
100 gallons of estimated graywater discharge per day and maximum absorption
capacity are shown in Table No. J-2 of Appendix J.
Groundwater table:
Geology and disposal records will be used to help determine this requirement.
Costs of stub -out valve installation:
Graywater plumbing can be installed in a new house for future graywater use
even though the owner is not ready to install the irrigation system. The
proposed ordinance allows the installation of an accessible three-way valve
with plumbing stub -out that is capped off for a future graywater system from a
clotheswasher. The minimum cost for this installation is $25 to $50 for a
clotheswasher installed in the exterior wall of a dwelling or garage. The cost
could increase up to $100 if the clotheswasher is located within an interior
wall and the plumbing stub -out must be extended outside the building. Costs
may also increase depending on the type and quality of the valve selected.
However, the cost of an installed graywater system would be significantly
offset by the cost savings of reduced water consumption.
Inspection and permit fees:
ORDINANCE NO. 250
PAGE 4 OF 5
Adding a stub -out valve for a future graywater system would cost the same as
a regular plumbing fixture at $11.00 per fixture. A plumbing permit will be
required for each complete graywater system. The permit fee for a graywater
system for a new single family dwelling or an existing residence will be a total
of $360.50 for plan check and permit fees for Rolling Hills property owners.
These fees are separate from regular plumbing fees. Inspection by County
Building and Safety will be required.
Waiver requirement:
This requirement is for demonstration systems only' and not standard
graywater systems. This requirement is consistent with Section J -12(a) as a
reasonable and necessary condition.
RECOMMENDATION
It is recommended that the City Council consider the draft ordinance and introduce
Ordinance No. 250.
ORDINANCE NO. 250
PAGE 5 OF 5
DRAFT
ORDINANCE NO. 250
AN ORDINANCE OF THE CITY OF ROLLING HILLS ADOPTING BY
REFERENCE APPENDIX J (GRAYWATER STANDARDS) OF THE
STATE PLUMBING CODE, 1994 EDITION, AND AMENDMENTS
THERETO, ADOPTING THE LOS ANGELES COUNTY PLUMBING
CODE, TITLE 28, AND AMENDMENTS THERETO, AND AMENDING
PORTIONS OF CHAPTER 15.08 OF THE ROLLING HILLS MUNICIPAL
CODE.
THE CITY COUNCIL OF THE CITY OF ROLLING HILLS DOES HEREBY ORDAIN
AS FOLLOWS:
Section 1. Section 15.08.010 of Chapter 15.08 of Title 15 of the Rolling Hills
Municipal Code is amended to read:
"15.08.010 Adoption of Plumbing Code by reference.
A. Except as hereinafter provided, Chapters 1 through 13 and Appendices
A, B, C, D, I, and J of that certain Plumbing Code known and designated as the
"Uniform Plumbing Code, 1991 Edition," prepared by the International Association
of Plumbing and Mechanical .Officials, and further amended May 1, 1994, and Title
28, Plumbing Code of the Los Angeles County Code, as amended and in effect on
November 29, 1992, are hereby adopted by reference. Except for Chapter 14 of Title
28, Title 28 shall control over any conflict with said Uniform Plumbing Code, 1991
Edition. Sections 15.08.020, et seq., of Chapter 15.08 of Title 15 of the Rolling Hills
Municipal Code are hereby readopted. The above -mentioned codes or portions of
codes, amendments and sections which are hereby adopted shall constitute and may
be cited as the Rolling Hills Plumbing Code.
B. A copy of the Uniform Plumbing Code, 1991 Edition, Title 28 and
Chapter 15.08 of Title 15 of the Rolling Hills Municipal Code have been deposited in
the office of the City Clerk of the City of Rolling Hills and shall be at all times
maintained by the Clerk for use and examination by the public."
Section 2. Section 15.08.025 of Title 15 is hereby amended by adding the
following Subsection (BB) to read as follows:
"BB. Amendments to Appendix 1. Notwithstanding the provisions of
Section 1 of this Ordinance, Appendix J of the Plumbing Code is amended as
follows:
ORDINANCE NO. 250
PAGE 1 OF 5
1. Section J -1(i) is added to read as follows:
(i) Where a graywater system is to be installed as part of the
construction of a new single family dwelling or in connection with any
remodelling of a single family dwelling, an accessible three-way valve
and, where required, plumbing stub -out that allows diversion of
graywater from a clothes washer to either a graywater system or a
sewer may also be installed.
2. Section J -9(e) is amended by adding the following sentence to the end
of that subsection: "If the surge tank is below the septic tank outlet, a
pump to lift the graywater up to the septic tank inlet and an overflow
alarm system may be installed in lieu of the drain and overflow pipe
required by this Section J -9(e)."
3. Section J-11 is amended to add Subsection (a)(8) to read as follows:
"8. When drip irrigation lines are installed on sloping
ground, the lines shall be installed with the contours of the slope, and
stepped down the slope, as required. The connection lines between
each horizontal leaching section shall be water tight."
4. Section J -11(b)(1) is amended to read as follows:
"1. Perforated sections shall be a minimum 3 -inch diameter
or 1-1/2 inch diameter slotted effluent pipe and shall be constructed of
perforated high density polyethylene pipe, perforated ABS pipe,
perforated PVC pipe, or other approved materials, provided that
sufficient openings are available for distribution of the graywater into
the trench area. Material construction and perforation of the piping
shall be in compliance with the appropriate absorption field drainage
piping standards and shall be approved by the Administrative
Authority. Perforated flex pipe with perforation on all sides is
prohibited."
5. Section J -11(b)(2) is amended by adding the word "round" between
"stone," and "gravel" in the first sentence.
6. Section J-11 is amended to add Subsection (b)(4) to read as follows:
"(4) When mini-leachfield lines are installed on sloping
ground, the lines shall be installed with the contours of the slope, and
stepped down the slope, as required. The connection lines between
each horizontal leaching section shall be watertight."
ORDINANCE NO. 250
PAGE 2 OF 5
7. Section J -12(a) is amended by adding the following sentence at the end
of that subsection:
"The Building Official may approve a demonstration system upon
determination that the system provides substantially equivalent health and
safety protection to a system conforming to Appendix J. The Building Official
may impose any reasonable and necessary conditions on the approval of a
demonstration system."
8. Section J-14 is added to read as follows:
"Section J-14 Landslide Areas.
Notwithstanding the provisions of this Appendix J, as amended, the
Building Official may waive the requirements of this Code where special
conditions, including, but not limited to, type of soils and lot configuration,
warrant such changes for homes located in landslide areas. Such waivers are
limited to the requirements which are impractical or counter -indicated given
the particular circumstances of the lot."
9. Section J-15 is added to read as follows:
"Section J-15 Graywater Information Handbooks.
Informational handbooks, which may also include implementing
regulations, consistent with Appendix J of the Rolling Hills Plumbing Code,
as amended shall be at all times available at the public counter."
Section. 3. The City Council finds:
A. Gray water systems used for landscape irrigation would be
advantageous to the residents of the City of Rolling Hills. The majority of homes
use a septic tank disposal system in which sewage and waste water is drained into a
buried tank that leaches out into one concentrated area of a lot. With a graywater
system, a portion of that waste water, graywater, would be dissipated throughout a
broad expanse of landscaping on a lot. Using graywater would save the homeowner
and the water district both water and costs, especially during times of drought. The
County specifications are planned to make it easy for homeowners to comply with
requirements using common plumbing materials and logical specifications for
health and safety.
B. Modifications to the Plumbing Code that permit graywater systems are
reasonable because of local climate, characterized by hot, dry summers, followed by
strong Santa Ana winds and heavy winter rains which make structures particularly
vulnerable to rapidly spreading wind driven fires and earth movement. These
conditions have been further complicated by intermittent drought conditions. The
ORDINANCE NO. 250
PAGE 3 OF 5
City contains irregular -shaped lots that are located in hilly areas. Terrain contains
natural canyon shrubbery as well as a great deal of landscaping. The City has a
complex geology that consists of landslide areas that have been identified by the
United States Geologic Survey. There are extreme fire hazards in late summer and
early fall that create an exceptional need to irrigate fire-resistant plants. There are
earth movement hazards, including soil creep and hillslope mass movements
which emphasize the importance of near surface disposal by evapo-transpiration.
The reuse of all types of waste water for the prevention of any deep percolation
below the root zone of grasses, shrubs and trees is also advantageous. Therefore, the
use of graywater systems would conserve water through reuse, encourage
landscaping to reduce fire hazards, preserve resources during drought conditions,
and reduce demand on septic systems.
Section 4. This ordinance adopts, like the County ordinances, the Uniform
Code as approved by code writing organizations, the amendments to those codes
adopted by agencies of the State of California upon the incorporation of those codes
into the California Building Standards Code, and the local amendments stated in
this ordinance. In so doing, this ordinance adopts and amends the applicable
provisions of the California Building Standards Code as required by Health & Safety
Code Section 18941.5.
Section 5. Except as herein amended, Chapter 15.08 of Title 15 of the
Rolling Hills Municipal Code shall remain in full force and effect.
PASSED AND ADOPTED ON THE DAY OF , 1995.
GODFREY PERNELL, D.D.S.
MAYOR
ATTEST:
MARILYN KERN, DEPUTY CITY CLERK
ORDINANCE NO. 250
PAGE 4 OF 5
STATE OF CALIFORNIA
COUNTY OF LOS ANGELES
CITY OF ROLLING HILLS
SS
I certify that the foregoing Ordinance No. 250 entitled:
AN ORDINANCE OF THE CITY OF ROLLING HILLS ADOPTING BY
REFERENCE APPENDIX J (GRAYWATER STANDARDS) OF THE
STATE PLUMBING CODE, 1994 EDITION, AND AMENDMENTS
THERETO, ADOPTING THE LOS ANGELES COUNTY PLUMBING
CODE, TITLE 28, AND AMENDMENTS THERETO, AND AMENDING
PORTIONS OF CHAPTER 15.08 OF THE ROLLING HILLS MUNICIPAL
CODE.
was approved and adopted at a regular meeting of the City Council on
1995 by the following roll call vote:
AYES:
NOES:
ABSENT:
ABSTAIN:
and in compliance with the laws of California was posted at the following:
Administrative Offices
DEPUTY CITY CLERK
ORDINANCE NO. 250
PAGE 5 OF 5
GRAYWATER SYSTEMS J 11
J 11-J 13 GRAYWATER SYSTEMS
gy. California State University, 5730 N. Chestnut Avenue. Fresno.
California 93740-0018.
(3) Each irrigation zone shall be designed to include no less than
the number of emitters specified in Table J-3. or through a proce-
dure designated by the Administrative Authority. Minimum spacing
between emitters is 14 inches- in any direction.
(4) The system design shall provide user controls. such as valves.
switches. timers and other controllers, as appropriate. to rotate the
distribution of graywater between irrigation zones.
(5) All drip irrigation supply lines shall be PVC Class 200 pipe or
better and Schedule 40 fittings. All joints shall be properly glued.
inspected and pressure tested at 40 psi. and shown to be drip tight
for live minutes. before burial. All supply lines will be buried at least
8 inches deep. Drip feeder lines can be poly or flexible PVC tubing
and shall be covered to a minimum depth of 9 inches.
(6) Where pressure at the discharge side of the pump exceeds 20
psi. a pressure -reducing valve able to maintain downstream pres-
sure no greater than 20 psi shall be installed downstream from the
pump and before any emission device.
(7) Each irrigation zone shall include an automatic flush valve/vac-
uum breaker to prevent back siphonage of water and soil.
(b) Standards for the mini-leachlield system are (Figure 5):
(1) Perforated sections shall be a minimum 3 -inch diameter and
shall be constructed of perforated high -density polyethylene pipe,
perforated ABS pipe. perforated PVC pipe. or other approved ma-
terials. provided that sufficient openings are available for distribu-
tion of the graywater into the trench area. Material. construction
and perforation of the piping shall be in compliance with the ap-
propriate absorption field drainage piping standards and shall be
approved by the Administrative Authority.
(2) Clean stone. gravel or similar filter material acceptable to the
Administrative Authority. and varying in size between 34 inch to
21,'2 inches shall be placed in the trench to the depth and grade re-
quired by this Section. Perforated sections shall be laid on the lifter
material in an approved manner. The perforated sections shall then
be covered with filter material to the minimum depth required by this
Section. The filter material shall then be covered with landscape fil-
ter fabric or similar porous material to prevent closure of voids with
earth backlill. No earth backlill shall be placed over the filter materi-
al cover until alter inspections and acceptance.
MAY 9. (9W
224.7
CI.
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(3) Irrigation fields shall be constructed as follows:
Minimum
Number of drain lines per irrigation zone 1
Length of each perforated fine —
Bottom width of trench 6 inches
Total depth of trench 17 inches
Spacing of lines. center to center 4 feet
Depth of earth cover of fines 9 inches
Depth of filter material cover of lines 2 inches
Depth of filter material beneath lines 3 inches
Grade of perforated lines level
Maximum
100 feet
18 Inches
18 inches
3 Inches/ 100 leer
J 12 Special Provisions
(a) Other collection and distribution systems may be approved by
the Administrative Authority as allowed by Section 201 of the U. PC.
(b) Nothing contained in this Appendix shall be construed to prevent
the Administrative Authority from requiring compliance with stricter re-
quirements than those contained herein. where such stricter require-
ments are essential in maintaining sale and sanitary conditions or from
prohibiting graywater systems.
J 13 Health and Safety
(a) Graywater may contain fecal matter as a result of bathing andior
washing of diapers and undergarments. Water containing fecal matter.
if swallowed. can cause illness in a susceptible person.
(b) Graywater shall not include laundry water from soiled diapers.
(c) Graywater shall not be applied above the land surface or allowed
to surface and shall not be discharged directly into or reach any storm
sewer system or any water of the United States.
(d) Graywater shall be not be contacted by humans. except as re-
quired to maintain the graywater treatment and distribution system.
(e) Graywater shall not be used for vegetable gardens.
224.8
MAY O. (1M
GRAYWATER SYSTEMS J 9
et
J 9 Surge Tank Construction (Figures 1, 2, 3 and 4) A L
(a) Plans for surge tanks shall be submitted to the Administrative A 1
Authority for approval. The plans shall show the data required by the Al.
Administrative Authority and may include dimensions. structural cal- A i.
culations. and bracing details. A
(b) Surge tanks shall be constructed of solid. durable materials. not A
I.
subject to excessive corrosion or decay, and shall be watertight. A I.
(c) Surge tanks shall be vented as required by Chapter 5 of this cis
Code and shall have a locking, gasketed access opening. or approved n 1
equivalent. to allow for inspection and cleaning. A
L.
(d) Surge tanks shall have the rated capacity permanently marked 1(‘.1:
on the unit. In addition. GRAYWATER IRRIGATION SYSTEM. DAN- )(\..1.
GER—UNSAFE WATER shall be permanently marked on the surge '‘.1.
tank. AI
ni
(e) Surge tanks installed above ground shall have a drain and over- ,
flow, separate from the line connecting the tank with the irrigation fields ',. I.
The drain and overflow shall have a permanent connection to a sewer
or to a septic tank. and shall be protected against sewer line backllow A.1.
by a backwater valve. The overflow shall not be equipped with a shut- A
oll valve. A
(I) The overflow and drain pipes shall not be less in diameter than '\
the inlet pipe. The vent size shall be based on the total graywater fixture A
units. as outlined in U.P.C. Table 4-3 or local equivalent. Unions or n
equally effective fittings shall be provided for all piping connected to the A
surge tank. A
(g) Surge tanks shall be structurally designed to withstand antic- n.
loads. Surge lank covers shall be capable of supporting an earth A
load of not less than 300 pounds per square foot when the lank is de- A
signed for underground installation. t'
(h) Surge tanks may be installed below ground in a dry well on com- n
pacted soil. or buried if the tank design is approved by the Administra- n .
five Authority. The system shall be designed so that the tank overflown
will gravity drain to a sanitary sewer line or septic tank. The tank must c L
be protected against sewer line backllow by a backwater valve. AL
r I.
(i) Materials A I.
CL
(1) Surge tanks shall meet nationally recognized standards for L
nonpotable water and shall be approved by the Administrative Au- A L
thority. Al.
MAY f ISM
224.5
J 9-J 11 GRAYWATER SYSTEMS
L A (2) Steel surge tanks shall be protected from corrosion. both exter-
L C nally and internally. by an approved coating or by other acceptable
L C means.
LA
L A J 10 Valves and Piping (Figures 1, 2, 3 and 4)
L A Graywater piping discharging into a surge tank or having a direct con -
LC
LC A nection to a sanitary drain or sewer piping shall be downstream of an
L A approved waterseal-type trap(s). ll no such trap(s) exists. an approved
LC
LA vented running trap shall be installed upstream of the connection to
L A protect the building from any possible waste or sewer gases. All gray -
water piping shall be marked or shall have a continuous tape marked
with the words DANGER —UNSAFE WATER. All valves, including the
three-way valve, shall be readily accessible and shall be approved by
the Administrative Authority. A backwater valve, installed pursuant to
this Code, shall be provided on all surge tank drain connections to the
sanitary drain or sewer piping.
J 11 Irrigation Field Construction
The Administrative Authority may permit subsurface drip irrigation,
mini-leachlield or other equivalent irrigation methods which discharge
graywater in a manner which ensures that the graywater does not sur-
face. Design standards for subsurface drip irrigation systems and mrni-
leachlield irrigation systems follow:
Standards for a subsurface drip irrigation system are:
(1) Minimum 140 mesh (115 micron) 1 -inch filter with a capacity of
25 gallons per minute, or equivalent, filtration shall be used. The Id -
ter backwash and flush discharge shall be caught, contained and
disposed of to the sewer system. septic tank or, with approval of the
Administrative Authority, a separate mini-leachlield sized to accept
all the backwash and flush discharge water. Filter backwash water
and (lush water shall not be used for any purpose. Sanitary proce-
dures shall be followed when handling lifter backwash and flush
discharge or graywater.
(2) Emitters shall have a minimum flow path of 1,200 microns and
shall have a coefficient of manufacturing variation (Cv) of no more
than 7 percent. Irrigation system design shall be such that emitter
flow variation shall not exceed t 10 percent. Emitters shall be rec-
ommended by the manufacturer for subsurface use and graywater
use, and shall have demonstrated resistance to root intrusion. For
emitter ratings, refer to Irrigation Equipment Performance Report,
Drip Emitters and Micro -Sprinklers, Center for Irrigation Technoio-
LC
LA
LC
LA
LC
LA
LC
LC
LA
LC
LA
LA
LC
LA
LC
LA
LC
LA
LC
LCC
LA
LC
LA (a)
LC
LA
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LA
LA
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LA
LA
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LA
LA
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LC
LA
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LA
LC
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LA
LC
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LA
224.6
MAY f. HM
GRAYWATER SYSTEMS J 4-J 6
percolation tests, the Administrative Authority may allow the use of A t
Table J-2, an infiltration rate designated by the Administrative Authorit y, k[:
or an infiltration rate determined by a test approved by the Administra- cAl-
c L
five Authority. AL
L
J 5 Inspection and Testing AL(a) Inspection 318 c L
(1) All applicable provisions of this Appendix and of Section CL
of the U.P.C. shall be complied with.
(2) AL
System c L
components shall be properly identified as to manufac-
turer. AL
(3) Surge tanks shall be installed on dry, level, well -compacted soil A L
if in a drywell, or on a level, 3 -inch concrete slab or equivalent, if c L
above ground. CL
L
(4) Surge tanks shall be anchored against overturning. AL
(5) 11 the irrigation design is predicated on soil tests, the irrigation A L
field shall be installed at the same location and depth as the tested c L
area. Al.
(6) Installation shall conform with the equipment and installation c L
methods identified in the approved plans. A L
(7) Graywater stub -out plumbing may be allowed for future con- c L
nection prior to the installation of irrigation lines and landscaping. A L
Stub -out shall be permanently marked GRAYWATER STUB -OUT, (At:
DANGER —UNSAFE WATER. c L
AL
(b) Testing CL
A L
(1) Surge tanks shall be filled with water to the overflow line prior A L
to and during inspection. All seams and joints shall be left exposed (AI:
and the tank shall remain watertight. A is
(2) A flow test shall be performed through the system to the point A L
of graywater irrigation. All lines and components shall be water- A L
tight. AL
J 6 Procedure for Estimating Graywater Discharge A L
The Administrative Authority may utilize the graywater discharge pro- ,41L-.
cedure listed below, water use records, or calculations of local daily per c L
person interior water use: AL
(a) The number of occupants of each dwelling unit shall be calcu- c L
lated as follows: AL
First bedroom • 2 occupants CL
c L
Each additional bedroom 1 occupant AL
MAY. 1994
224.3
J 6-J 8 GRAYWATER SYSTEMS
LC (b) The estimated graywater flows for each occupant shall be calcu-
L A lated as follows:
LC LA Showers, bathtubs and wash basins
LC
LA Laundry
LC
LA (c) The total number of occupants shall be multiplied by the applica-
L A ble estimated graywater discharge as provided above and the type of
L A fixtures connected to the graywater system.
E.0
c J 7 Required Area of Subsurface Irrigation
L t Each irrigation zone shall have a minimum effective irrigation area for
L c the type of soil and infiltration rate to distribute all graywater produced
L c daily. pursuant to Section J-6, without surfacing. The required irrigation
Lc area shall be based on the estimated graywater discharge. pursuant
L A to Section J-6 of this Appendix, size of surge tank, or a method deter -
LC A mined by the Administrative Authority. Each proposed graywater sys-
1.
A tem shall include at least two irrigation zones and each irrigation zone
LA shall be in compliance with the provisions of this Section.
L A 11 the mini-leachfield irrigation system is used. the required square
LA footage shall be determined from Table J-2. or equivalent, for the type
LA of soil found in the excavation. The area of the irrigation field shall be
Lc:
1:(/, equal to the aggregate length of the perforated pipe sections within the
L A irrigation zone times the width of the proposed mini-leachfield trench.
L A No irrigation point shall be within 5 vertical feet of highest known
L A seasonal groundwater nor where graywater may contaminate the
c water or ocean water. The applicant shall supply evidence of
-( ground water depth to the satisfaction of the Administrative Authority
A
A J 8 • Determination of Irrigation Capacity
.c
A (a) In order to determine the absorption quantities of questionable
• soils other than those listed in Table J-2, the proposed site may be sub -
A jected to percolation tests acceptable to the Administrative Authority or
L A determined by the Administrative Authority.
(b) When a percolation test is required. no mini-leachliekisystem or
A subsurface drip irrigation system shall be permitted if the test shows the
A absorption capacity of the soil is less than 60 minutes inch or more rap -
A id than live minutes/inch. unless otherwise permuted by the Adminis-
A trative Authority.
A (c) The irrigation field size may be computed from Table J 2, or de -
A (ermined by the Administrative Authority or a designee of the Admrnis
L A Irative Authority.
224.4
25 GPO/occupant
15 GPD/occupant
MAY 9 1994
California Graywater Standards
GRAYWATER SYSTEMS
APPENDIX J
J1
CL
AL
AL
Graywater Systems for Single-family Dwellings CL
AL
CL
J 1 Graywater Systems (General) AL
(a) The provisions of this Appendix shall apply to the construction, A L
alteration and repair of graywater systems for subsurface landscape ir-
rigation. A L
rigation. Installations shall be allowed only in single-family dwellings. A
The system shall have no connection to any potable water system and A L
shall not result in any surfacing of the graywater. Except as otherwise A L
provided for in this Appendix, the provisions of the Uniform Plumbing c L
Code (U.P.C.) shall be applicable to graywater installations. AL
(b) The type of system shall be determined on the basis of location.
soil type and ground water level and shall be designed to accept all c L
graywater connected to the system from the residential building. The c L
system shall discharge into subsurface irrigation fields and may include c L
surge tank(s) and appurtenances, as required by the Administrative A L
Authority. CL
(c) No graywater system, or part thereof, shall be located on any lot f( 1:
other than the lot which is the site of the building or structure which dis-
charges the graywater: nor shall any graywater system or part thereof A �.
be located at any point having less than the minimum distances indi- Al.
cated in Table J-1. " L
(d) No permit for any graywater system shall be issued until a plot AL
plan with appropriate data satisfactory to the Administrative Authority A
has been submitted and approved. When there is insufficient lot area n 1:
or inappropriate soil conditions for adequate absorption of the graywa- (1,[:
ter. as determined by the Administrative Authority, no graywater sys- (;k1:
tem shall be permitted. The Administrative Authority is a city or county. (it :
(e) No permit shall be issued for a graywater system which would A L
adversely impact a geologically sensitive area, as determined by the A L
Administrative Authority.
(1) Private sewage disposal systems existing or to be constructed on c
the premises shall comply with Appendix I of this Code or applicable c L
local ordinance. When abandoning underground tanks, Section 1119 c
of the U.P.C. shall apply. Also, appropriate clearances from graywater
systems shall be maintained as provided in Table J-1. The capacity of C L
the private sewage disposal system. including required future areas. c L.
shall not be decreased by the existence or proposed installation of a Ai
graywater system servicing the premises. A
c1
MAY 9. 1904
J 1-J 4 GRAYWATER SYSTEMS
LA (g) Installers of graywater systems shall provide an operation and
Lc maintenance manual. 'r. - Antab!e to the Administrative Authority. to the
L c owner of each system. Graywater systems require regular or periodic
LA
LC maintenance.
L c (h) The Administrative Authority shall provide the applicant a copy
L C of this Appendix.
LA
L A J 2 Definitions
LA Graywater is untreated household waste water which has not come
L A into contact with toilet waste. Graywater includes used water from bath -
L A tubs, showers, bathroom wash basins, and water from clothes washing
LC machines and laundry tubs. It shall not include waste water from kitch-
LA
L LC A en sinks, dishwashers or laundry water from soiled diapers.
LC Surfacing of graywater means the ponding. running off or other re -
L C lease of graywater from the land surface.
LLA
A J 3 Permit
L A It shall be unlawful for any person to construct. install or alter, or cause
L A to be constructed, installed or altered, any graywater system in a build -
L c ing or on a premises without first obtaining a permit to do such work
L c from the Administrative Authority.
LA
L A J 4 Drawings and Specifications
L A The Administrative Authority may require any or all of the following in -
t= A formation to be included with or in the plot plan before a permit is issued
L c for a graywater system:
LA (a) Plot plan drawn to scale completely dimensioned. showing lot
c lines and structures, direction and approximate slope of surface. loca-
L c tion of all present or proposed retaining walls, drainage channels, water
LA supply lines. wells. paved areas and structures on the plot, number of
bedrooms and plumbing fixtures in each structure. location of pnvate
sewage disposal system and 100 percent expansion area or building
sewer connecting to public sewer, and location of the proposed gray -
water system.
(b) Details of construction necessary to ensure compliance with the
requirements of this Appendix together with a lull description of the
complete installation, including installation methods, construction and
materials as required by the Administrative Authority.
(c) A log of soil formations and ground water level as determined by
test holes dug In close proximity to any proposed irrigation area. togeth-
er with a statement of water absorption characteristics of the soil at the
proposed site as determined by approved percolation tests. In lieu of
M999.IS
LA
LC
LA
LC
LA
LC
LA
LC
LA
LC
LA
LC
LCC
LA
LA
LC
LC
LC
LA
224.2
224.1
GRAYWATER SYSTEMS
FIGURE 1
FIGURE 2
GRAYWATER SYSTEMS'
I/4"/FT rovcrflow C L L C
Graywater Fullway Valve A L L A
Vented running trap (ro Valve Irri anion S C L L C
if required g y / A L L A
San Tee Fufway C L L C
Grade V V Usage A L L A
C' L L C
t r r =" Grade A L L A
CL LC
AL LA
CL LC
* AL LA
4• Can To irrigation system A L L A 4...
1N"/FT Minimum of two C L L C
A LA
To building drain, sewer. A L L C
LA
VTR or 10' above grade
(support required)
3 -way valve
San Tee
I/4"/FT Backwater Valve
To building drain,
or septic tank. if say C L L C sewer. or septic tank
AL I.A
CL LC
AL LA
C'I. LC
AL LA
AL LA
CL LC
AL
CL LC
AL LA
Cl. LC
AL LA
CL
AL LA
AL LA
AL
CL LC
AL LA
CL I.0
Al. I.A
CL I.0
Figure 1—Graywater System Single Tank —Gravity (conceptual) A L L Figure 2—Graywater A g System Single Tank —Pumped (conceptual)
A�lYi00i
CIO Cleanout
N.C. Normally Closed
VTR Vent TAru Roof
Screened vents
LC
AL LA
L A
CL LC
AL LA
CL LC
AL LA
v3r mesh A L L A
CL LC
AL
CL LA
AL LC
VW shall be within / CAL L C
tray arm distance of ( R or la aa grade Union or equal (IYP) A L L CA t dull be within
rtwrng trap L A stun distance of
C L \
L C running trap
Locking Cover(accer) CC LL L CC
L LC
C
LA
Oreywrp Inlet / Approved wa tight tank C L L C Oraywre
C L L C sous r
AL LA+e►
A l_ L A L /4'/FT
Veined running
if required
KNOX
cre 3- Con te Pad
or equivalent
irrigation lines required C L
Grade
Inlet
P
Screened vents
3/32" or less
Approved water tight tank with locking Dove
Beckwre Valve
Shut-off valve
3" Concrete Pad
or equivalent
Unity at equal
Grade
MAY 9 1991
224.11 ' 224.12
Pump
ABIReviations
C/O Cleanout
N.C. Normally Closed
VTR Vent Thru Roof
To Wipeout sysant
Mailman of two
irrigation lives enquired
new 9 rtga
GRAYWATER SYSTEMS
Table J-1 Location of Graywater System
Minimum Horizontal Distance From
Surge
Tank
(feet)
Irrigation
Fled (feet)
Buildings or structures1
52
83
Property line adjoining private properly
5
5
Water supply wells'
50
100
Streams and lakes"
50 .
50
Seepage pits or cesspools
5
5
Disposal field and 100 percent expansion
area
5
45
Septic tank
0
56
On -site domestic water service line
5
57
Pressure public water main
10
108
Water ditches
50
50
NOTES: When mini -leach fields are installed in sloping ground, the minimum honzonta
distance between any part of the distribution system and ground surface shall be 15
feel.
'Including porches and steps. whether covered or uncovered, but does not include car-
ports, covered walks, driveways and similar structures.
2Thedistance may be reduced to 0 feet for aboveground tanks if approved by the Adminis-
trative Authority.
SThedistance may be reduced to 2 feet, with a water barrier. by the Administrative Author.
Sy. upon consideration of the sod expansion index.
'owners special hazards are involved. the distance may be increased by the Administra-
hve Authority.
5Applres to the mm.-leachheld type system only. Plus 2 feel for each additional fool of
depth in excess of 1 tool below the bottom of the dram line.
6Appltes to mml-leachlield•type system only.
7A 2 -foot separation is required for subsurface drip systems.
eFor parallel construction or for crossings. approval by the Administrative Authority shall
be required.
TABLE J-1
MAY tl. 1554
CL
AL
Cl.
Al.
CL
AL
CL
AL
CL
AL
CL
AL
CL
AL
CL
AL
CL
AL
CL
AL
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AL
CL
AL
CL
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AL
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AL
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AL
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AL
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C L
AL
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AL
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AL
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AL
CL
TABLES J-2 and J-3
LC
LA
LC
LA
LC
LC
1.A
LC
LA
LC
LA
LC
LA
LC
LA
LC
LA
I.0
LA
LC
I.A
LC
LA
LC
LA
1.0
I.A
LC
I.A
LC
LA
LC
LA
I.('
1.A
LC
I.A
LC
LA
I.0
1.A
1.0
LA
L. C
LA
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1.A
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Table J-2
GRAYWATER SYSTEMS
Mini-Leachfleld Design Criteria of Six Typical Solis
Type of Soil
1. Coarse sand or gravel
2. Fine sand
3. Sandy loam
4. Sandy clay
5. Clay with considerable
sand or gravel
6. Clay with small
amount of sand or
gravel
Minimum sq. ft. of
irrigation area per
100 gallons of esti-
mated graywater
discharge per day
20
25
40
60
90
120
Maximum absorp-
tion capacity, min-
utes per inch, of
irrigation area for a
24 -hour period
5
Table J-3 Subsurface Drip Design Criteria
of Six Typical Solis
Type of Soil -- -
1. Sand
2. Sandy loam
3. Loam
4. Clay loam
5. Silty clay
6. Clay
Maximum
emitter
discharge
(gal/day)
1.4
1.2
0.9
0.6
0.5
12
18
24
48
Minimum number
of emitters per gpd
of graywater
production
06
0.7
09
11
1.6
2.0
Use the daily graywater flow calculated in Section J-6 to determine the
number of emitters per line.
MAY • ryes
224.9
224.10
I
Vent shall be
within trap arm
distance of
running trap
Graywater
source
•
Screened vents
3/31' mesh
N.
VTR or 10' above grade
(support required)
3•way •alve
Vented running trap.
if required
Grade San Tee
s /• ��
Wye & 1/8 Bend
1/4"/FT Backwater Valve
To building drain.
sewer, or septic tank
Vent shall be within
trap arm distance of
running trap
Vented running trap.
if required
Graywater
source l/4"/FT
ar
Grade
Wye & 1/8 Bend
Backwater Valve
1 /4"/FT
To building drain.
sewer, or septic tank
Inlet
a
rtri
%erllow
ISO Valve)
6- above top of
highest tank
Graywater
'Irrigation System
Graywater
Irrigation System
Danger
(nsafe Water
Drain (N.C.)
C/O
Overflow
(no Valve)
C�'g�
Unsafe Water
3" Concrete Pad
or equivalent
Abbreviation
C/O Cleanout
N.C. Normally Closed
VTR Vent Thru Roof
Union or equal
Locking Cover
/ Approved water tight
tank
Fullway Valve
Grade
To Irrigation system �+
Minimum of two irrigation
lines required
Figure 3—Graywater System Multiple Tank (conceptual)
Screened vent
3/32' mesh
VTR or 10' above grade
(support required)
3 -way valve
Inlet
t/4"/FT /
Overflow
CIO (no vent)
Capped drain
Union or equal
1e
ri NA
Abbreviations
C/O Cleanout
VTR Vent Thar Roof
Backwater Valve
Shut-off valve
To Irrigation system
Minimum of two irrigation
lines required
1 \`
Locking cover
Water tight tank approved
for underground use
Pump
Sign on top of tank
Graywater Irrigation System
DANGER
UNSAFE WATER
Figure 4—Graywater System Underground Tank (conceptual)
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5
C
m
SW3ISAS EGIVMAVHC
• 1i
•
Grads
2'
•
To public -
sewer
PL
3" (minimum) perforated pipe section
Figure 5—Graywater System Irrigation Layout (conceptual)
Soil
Gravel
filter fabric
~or equivalent 17" Min.
Note: each irrigation zone A L
shall have a minimum effec- A L
five irrigation area based on A L
Section 1-7.. CL
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INCORPORATED JANUARY 24, 1957
HEARING DATE: JULY 24, 1995
TO:
ATTENTION:
FROM:
SUBJECT:
Agenda Item No.: 7A
Mtg. Date: 7/24/95
NO. 2 PORTUGUESE BEND ROAD
ROLLING HILLS, CALIF. 90274
(310) 377.1521
FAX: (310) 377-7288
HONORABLE MAYOR AND MEMBERS OF THE CITY
COUNCIL
CRAIG R. NEALIS, CITY MANAGER
LOLA M. UNGAR, PRINCIPAL PLANNER
PROPOSED ORDINANCE NO. 250: AN ORDINANCE OF
THE CITY OF ROLLING HILLS ADOPTING BY
REFERENCE APPENDIX J (GRAYWATER STANDARDS)
OF THE STATE PLUMBING CODE, 1994 EDITION, AND
AMENDMENTS THERETO, ADOPTING THE LOS
ANGELES COUNTY PLUMBING CODE, TITLE 28, AND
AMENDMENTS THERETO, AND AMENDING
PORTIONS OF CHAPTER 15.08 OF THE ROLLING HILLS
MUNICIPAL CODE.
BACKGROUND
Attached is a draft ordinance prepared with the assistance of Mr. Kevin Ennis,
Assistant City Attorney, that adopts and amends the State's Graywater Standards of
the Uniform Plumbing Code specifically for the City of Rolling Hills. Staff reviewed
the City of Malibu's graywater ordinance and incorporated important features that
are consistent with the City of Rolling Hills' particular needs. The City Council
should note that the City of Malibu's ordinance is more stringent in that it requires
that all new single family residences and all renovations install dual plumbing to
allow and facilitate the installation of a graywater system. The Rolling Hills draft
ordinance permits dual plumbing that allows and facilitates the installation of a
graywater system.
Graywater is untreated household waste water which has not come into contact with
toilet waste. Graywater includes used water from bathtubs, showers, bathroom wash
basins, and water from clothes washing machines and laundry tubs. It shall not
include waste water from kitchen sinks, dishwashers or laundry water from soiled
diapers.
ORDINANCE NO. 250
PAGE 1 OF 5
®Printed on Recycled Paper
Staff conferred with Mr. Jim Fry, Chief Plumbing and Mechanical Inspector, Building
and Safety Division of the Los Angeles County Mechanical & Plumbing Section of
the Department of Public Works, and Ms. Lata Thakar, District Engineer, Lomita
Office, Building and Safety Division of the Department of Public Works, regarding
the permitting of construction of graywater systems for landscape irrigation in the
City of Rolling Hills.
PROPOSED CHANGES TO STATE STANDARDS
Section 2 of the proposed ordinance lists the differences or amendments between the
City and State ordinances. All City changes are based on local climatic, topographical,
or geological conditions as follows:
Section J -1(i): All new single family residences permitted after the effective date of
the ordinance would be allowed to install dual plumbing to allow and
facilitate the installation of a graywater system. Staff estimates the cost
for such additional plumbing lines to not be significant.
All renovations to and/or replacement of applicable plumbing fixtures
and plumbing systems in existing single family dwellings that are
permitted after the effective date of this ordinance would be allowed to
include dual plumbing lines to facilitate the installation of a graywater
system. Staff estimates the cost for such additional plumbing to be
minimal. The City may disallow a graywater system if it would
adversely impact a geologically sensitive area.
Section J -9(e): An option has been added to install an overflow alarm and pump
when the graywater surge tank can only be installed lower than the
septic tank. This is a requirement based on local topographical
conditions of irregular land surface and hillside lots, particularly for
graywater installations for existing single family dwellings. Chief
Inspector Fry says that when the surge tank is below the septic tank, a
pump must be provided to pump the effluent up to the septic tank or
else the effluent would back up into the house or if the overflow were
open to the atmosphere then the effluent would spill out on the ground
surface which is not permitted.
Section J -11(a)(8): This amendment allows drip irrigation lines to be installed to
follow the existing contours based on local topographical conditions of
irregular land surface and hillside lots.
Section J -11(b)(1): This amendment allows a reduced standard size minimum pipe
diameter but it restricts it to slotted pipe rather than perforated (round
holes) pipe. The prohibition of fully perforated pipe is a more stringent
requirement. (Fully perforated pipe when curved would allow water to
ORDINANCE NO. 250
PAGE 2 OF 5
continue to flow in the same direction prior to the curve). Chief
Inspector Fry says that should any solids inadvertently get into the
system, a small diameter pipe will plug up much faster than a larger
pipe. Also, a larger pipe is much easier to clean out than a small one.
Section J -11(b)(2): This amendment is more stringent than the State code by
requiring round gravel. However, this amendment will increase the
effectiveness of the mini -leach field.
Section J -11(b)(4): This amendment allows mini -leach field lines to be installed to
follow the existing contours based on local topographical conditions of
irregular land surface and hillside lots.
Section J -12(a): This amendment is based on the authority already given the
Building Official under City Plumbing Code Section 201(k) for
equivalent protection to health and safety and Appendix I Section 1 (i)
alternative or demonstration systems. All such demonstration systems
must be equivalent to Appendix J as amended and/or as restrictive as
the State ordinance.
Section J-14: This amendment is specifically based on the physical constraints of
installing a graywater system in a landslide area and waives
requirements under certain conditions, especially where the dwelling
exists and a private disposal system has been installed. This
amendment is based on local topographical conditions of irregular land
surface and hillside lots.
County representatives are in agreement that a graywater system is even
advantageous in the Flying Triangle Active Landslide Area.
There will be no additional plumbing permit fee for dual plumbing fixtures, the
charge will be $11.00 per fixture, just as for any other plumbing fixture. The cost of a
plumbing permit for a graywater system for a proposed or an existing residence will
be $360.50 for plan check and permit fees for Rolling Hills property owners.
The County Building and Safety Department will be responsible for the permitting
and inspection of graywater systems. Enforcement of the ordinance for illegal,
unpermitted systems will also be the responsibility of the Building and Safety
Department. Any health concerns with graywater systems remain the responsibility
of the County Health Department.
A handbook published by the State Department of Water Resources and the City
ordinance will be available at the counter at City Hall to educate the public and assist
both owners and professionals who desire to legalize existing unpermitted systems
and install new systems.
COMMON QUESTIONS AND ANSWERS
Additional permits:
ORDINANCE NO. 250
PAGE 3 OF 5
An ordinary plumbing permit is the only required permit.
Minimum earth coverage:
Section J -11(b)(3) requiring a minimum 9 inches of earth cover has not been
specifically amended. However, Section J-11 allows the Building Official to
"permit equivalent irrigation methods which discharge graywater in a
manner which ensures that graywater does not surface." This section in
conjunction with J -12(a) allows the Building Official to review and approve
other systems such as sub -irrigated mulch trenches, dosed or pumped systems,
the substitution of drip irrigation for gravity irrigation, and other custom
designed irrigation systems as equivalent irrigation methods. Also, reduced
earth coverage for lines installed in segregated or remote landscape areas may
also be reviewed and approved as equivalent systems provided the discharged
graywater does not surface.
Vegetable gardens and fruit trees:
Section J -13(e) has not been amended. Graywater may not be used for
vegetable gardens or fruit trees.
Percolation tests:
A percolation test is already a standard requirement for private sewage
disposal design and installation for new single family construction and the
L.A. County Health Department files contain percolation test records for
existing dwellings. A percolation test for a graywater system would require the
same standard. Percolation tests minimum square feet of irrigation area per
100 gallons of estimated graywater discharge per day and maximum absorption
capacity are shown in Table No. J-2 of Appendix J.
Groundwater table:
Geology and disposal records will be used to help determine this requirement.
Costs of stub -out valve installation:
Graywater plumbing can be installed in a new house for future graywater use
even though the owner is not ready to install the irrigation system. The
proposed ordinance allows the installation of an accessible three-way valve
with plumbing stub -out that is capped off for a future graywater system from a
clotheswasher. The minimum cost for this installation is $25 to $50 for a
clotheswasher installed in the exterior wall of a dwelling or garage. The cost
could increase up to $100 if the clotheswasher is located within an interior
wall and the plumbing stub -out must be extended outside the building. Costs
may also increase depending on the type and quality of the valve selected.
However, the cost of an installed graywater system would be significantly
offset by the cost savings of reduced water consumption.
Inspection and permit fees:
ORDINANCE NO. 250
PAGE 4 OF 5
Adding a stub -out valve for a future graywater system would cost the same as
a regular plumbing fixture at $11.00 per fixture. A plumbing permit will be
required for each complete graywater system. The permit fee for a graywater
system for a new single family dwelling or an existing residence will be a total
of $360.50 for plan check and permit fees for Rolling Hills property owners.
These fees are separate from regular plumbing fees. Inspection by County
Building and Safety will be required.
Waiver requirement:
This requirement is for demonstration systems only and not standard
graywater systems. This requirement is consistent with Section J -12(a) as a
reasonable and necessary condition.
RECOMMENDATION
It is recommended that the City Council consider the draft ordinance and introduce
Ordinance No. 250.
ORDINANCE NO. 250
PAGE 5 OF 5
DRAFT
ORDINANCE NO. 250
AN ORDINANCE OF THE CITY OF ROLLING HILLS ADOPTING BY
REFERENCE APPENDIX J (GRAYWATER STANDARDS) OF THE
STATE PLUMBING CODE, 1994 EDITION, AND AMENDMENTS
THERETO, ADOPTING THE LOS ANGELES COUNTY PLUMBING
CODE, TITLE 28, AND AMENDMENTS THERETO, AND AMENDING
PORTIONS OF CHAPTER 15.08 OF THE ROLLING HILLS MUNICIPAL
CODE.
THE CITY COUNCIL OF THE CITY OF ROLLING HILLS DOES HEREBY ORDAIN
AS FOLLOWS:
Section 1. Section 15.08.010 of Chapter 15.08 of Title 15 of the Rolling Hills
Municipal Code is amended to read:
"15.08.010 Adoption of Plumbing Code by reference.
A. Except as hereinafter provided, Chapters 1 through 13 and Appendices
A, B, C, D, I, and J of that certain Plumbing Code known and designated as the
"Uniform Plumbing Code, 1991 Edition," prepared by the International Association
of Plumbing and Mechanical Officials, and further amended May 1, 1994, and Title
28, Plumbing Code of the Los Angeles County Code, as amended and in effect on
November 29, 1992, are hereby adopted by reference. Except for Chapter 14 of Title
28, Title 28 shall control over any conflict with said Uniform Plumbing Code, 1991
Edition. Sections 15.08.020, et seq., of Chapter 15.08 of Title 15 of the Rolling Hills
Municipal Code are hereby readopted. The above -mentioned codes or portions of
codes, amendments and sections which are hereby adopted shall constitute and may
be cited as the Rolling Hills Plumbing Code.
B. A copy of the Uniform Plumbing Code, 1991 Edition, Title 28 and
Chapter 15.08 of Title 15 of the Rolling Hills Municipal Code have been deposited in
the office of the City Clerk of the City of Rolling Hills and shall be at all times
maintained by the Clerk for use and examination by the public."
Section 2. Section 15.08.025 of Title 15 is hereby amended by adding the
following Subsection (BB) to read as follows:
"BB. Amendments to Appendix I. Notwithstanding the provisions of
Section 1 of this Ordinance, Appendix J of the Plumbing Code is amended as
follows:
ORDINANCE NO. 250
PAGE 1 OF 5
1. Section J -1(i) is added to read as follows:
(i) Where a graywater system is to be installed as part of the
construction of a new single family dwelling or in connection with any
remodelling of a single family dwelling, an accessible three-way valve
and, where required, plumbing stub -out that allows diversion of
graywater from a clothes washer to either a graywater system or a
sewer may also be installed.
2. Section J -9(e) is amended by adding the following sentence to the end
of that subsection: "If the surge tank is below the septic tank outlet, a
pump to lift the graywater up to the septic tank inlet and an overflow
alarm system may be installed in lieu of the drain and overflow pipe
required by this Section J -9(e)."
3. Section J-11 is amended to add Subsection (a)(8) to read as follows:
"8. When drip irrigation lines are installed on sloping
ground, the lines shall be installed with the contours of the slope, and
stepped down the slope, as required. The connection lines between
each horizontal leaching section shall be water tight."
4. Section J -11(b)(1) is amended to read as follows:
"1. Perforated sections shall be a minimum 3 -inch diameter
or 1-1/2 inch diameter slotted effluent pipe and shall be constructed of
perforated high density polyethylene pipe, perforated ABS pipe,
perforated PVC pipe, or other approved materials, provided that
sufficient openings are available for distribution of the graywater into
the trench area. Material construction and perforation of the piping
shall be in compliance with the appropriate absorption field drainage
piping standards and shall be approved by the Administrative
Authority. Perforated flex pipe with perforation on all sides is
prohibited."
5. Section J -11(b)(2) is amended by adding the word "round" between
"stone," and "gravel" in the first sentence.
6. Section J-11 is amended to add Subsection (b)(4) to read as follows:
"(4) When mini-leachfield lines are installed on sloping
ground, the lines shall be installed with the contours of the slope, and
stepped down the slope, as required. The connection lines between
each horizontal leaching section shall be watertight."
ORDINANCE NO. 250
PAGE 2 OF 5
7. Section J -12(a) is amended by adding the following sentence at the end
of that subsection:
"The Building Official may approve a demonstration system upon
determination that the system provides substantially equivalent health and
safety protection to a system conforming to Appendix J. The Building Official
may impose any reasonable and necessary conditions on the approval_ ofa
demonstration system."
8. Section J-14 is added to read as follows:
"Section J-14 Landslide Areas.
Notwithstanding the provisions of this Appendix J, as amended, the
Building Official may waive the requirements of this Code where special
conditions, including, but not limited to, type of soils and lot configuration,
warrant such changes for homes located in landslide areas. Such waivers are
limited to the requirements which are impractical or counter -indicated given
the particular circumstances of the lot."
9. Section J-15 is added to read as follows:
"Section J-15 Graywater Information Handbooks.
Informational handbooks, which may also include implementing
regulations, consistent with Appendix J of the Rolling Hills Plumbing Code,
as amended shall be at all times available at the public counter."
Section 3. The City Council finds:
A. Gray water systems used for landscape irrigation would be
advantageous to the residents of the City of Rolling Hills. The majority of homes
use a septic tank disposal system in which sewage and waste water is drained into a
buried tank that leaches out into one concentrated area of a lot. With a graywater
system, a portion of that waste water, graywater, would be dissipated throughout a
broad expanse of landscaping on a lot. Using graywater would save the homeowner
and the water district both water and costs, especially during times of drought. The
County specifications are planned to make it easy for homeowners to comply with
requirements using common plumbing materials and logical specifications for
health and safety.
B. Modifications to the Plumbing Code that permit graywater systems are
reasonable because of local climate, characterized by hot, dry summers, followed by
strong Santa Ana winds and heavy winter rains which make structures particularly
vulnerable to rapidly spreading wind driven fires and earth movement. These
conditions have been further complicated by intermittent drought conditions. The
ORDINANCE NO. 250
PAGE 3 OF 5
City contains irregular -shaped lots that are located in hilly areas. Terrain contains
natural canyon shrubbery as well as a great deal of landscaping. The City has a
complex geology that consists of landslide areas that have been identified by the
United States Geologic Survey. There are extreme fire hazards in late summer and
early fall that create an exceptional need to irrigate fire-resistant plants. There are
earth movement hazards, including soil creep and hillslope mass movements
which emphasize the importance of near surface disposal by evapo-transpiration.
The reuse of all types of waste water for the prevention of any deep percolation
below the root zone of grasses, shrubs and trees is also advantageous. Therefore, the
use of graywater systems would conserve water through reuse, encourage
landscaping to reduce fire hazards, preserve resources during drought conditions,
and reduce demand on septic systems.
Section 4. This ordinance adopts, like the County ordinances, the Uniform
Code as approved by code writing organizations, the amendments to those codes
adopted by agencies of the State of California upon the incorporation of those codes
into the California Building Standards Code, and the local amendments stated in
this ordinance. In so doing, this ordinance adopts and amends the applicable
provisions of the California Building Standards Code as required by Health & Safety
Code Section 18941.5.
Section 5. Except as herein amended, Chapter 15.08 of Title 15 of the
Rolling Hills Municipal Code shall remain in full force and effect.
PASSED AND ADOPTED ON THE DAY OF , 1995.
GODFREY PERNELL, D.D.S.
MAYOR
ATTEST:
MARILYN KERN, DEPUTY CITY CLERK
ORDINANCE NO. 250
PAGE 4 OF 5
STATE OF CALIFORNIA
COUNTY OF LOS ANGELES
CITY OF ROLLING HILLS
SS
I certify that the foregoing Ordinance No. 250 entitled:
AN ORDINANCE OF THE CITY OF ROLLING HILLS ADOPTING BY
REFERENCE APPENDIX J (GRAYWATER STANDARDS) OF THE
STATE PLUMBING CODE, 1994 EDITION, AND AMENDMENTS
THERETO, ADOPTING THE LOS ANGELES COUNTY PLUMBING
CODE, TITLE 28, AND AMENDMENTS THERETO, AND AMENDING
PORTIONS OF CHAPTER 15.08 OF THE ROLLING HILLS MUNICIPAL
CODE.
was approved and adopted at a regular meeting of the City Council on
1995 by the following roll call vote:
AYES:
NOES:
ABSENT:
ABSTAIN:
and in compliance with the laws of California was posted at the following:
Administrative Offices
DEPUTY CITY CLERK
ORDINANCE NO. 250
PAGE 5 OF 5
California Graywater Standards
GRAYWATER SYSTEMS
APPENDIX J
JI
CL
AL
CL
Graywater Systems for Single-family Dwellings CL
c L
J 1 Graywater Systems (General) CL
(a) The provisions of this Appendix shall apply to the construction, AL
alteration and repair of graywater systems for subsurface landscape ir- A L
rigation. Installations shall be allowed only in single-family dwellings. A L
The system shall have no connection to any potable water system and A L
shall not result in any surfacing of the graywater. Except as otherwise A L
provided for in this Appendix, the provisions of the Uniform Plumbing A L
Code (U.P.C.) shall be applicable to graywater installations. CL
(b) The type of system shall be determined on the basis of location. c L
soil type and ground water level and shall be designed to accept all c L
graywater connected to the system from the residential building. The tic
system shall discharge into subsurface irrigation fields and may include " L
surge tank(s) and appurtenances. as required by the Administrative A L
Authority. CL
(c) No graywater system, or part thereof. shall be located on any lot i L
other than the lot which is the site of the building or structure which dis-
charges the graywater: nor shall any graywater system or part thereof A �:
be located at any point having less than the minimum distances indi- Al.
cated in Table J-1. t4:
(d) No permit for any graywater system shall be issued until a plot Al.
plan with appropriate data satisfactory to the Administrative Authority A L
has been submitted and approved. When there is insufficient lot area A;:
or inappropriate soil conditions for adequate absorption of the graywa- A
ter. as determined by the Administrative Authority. no graywater sys- A is
tem shall be permitted. The Administrative Authority is a city or county. A �.
(e) No permit shall be issued for a graywater system which would (A: L
adversely impact a geologically sensitive area, as determined by the c L
Administrative Authority. C t
(I) Private sewage disposal systems existing or to be constructed on c L
the premises shall comply with Appendix I of this Code or applicable c L
local ordinance. When abandoning underground tanks, Section 1119 A
of the U.P.C. shall apply. Also. appropriate clearances from graywater L
systems shall be maintained as provided in Table J-1. The capacity of cis
the private sewage disposal system. including required future areas. < is
shall not be decreased by the existence or proposed installation of a c I
graywater system servicing the premises. A
Al
MAY s 1964
J 1-J 4 GRAYWATER SYSTEMS
LC
LA (g) Installers of graywater systems shall provide an operation and
LC maintenance manual. e' table to the Administrative Authority. to the
L C owner of each system. Graywater systems require regular or periodic
LA
LC maintenance. applicant a copy
LC (h) The Administrative Authority shall provide the app
LC of this Appendix.
LA
LC
LA J 2 Definitions
Graywater is untreated household waste water which has not come
LA
L A into contact with toilet waste. Graywater includes used water from bath -
LC tubs, showers, bathroom wash basins, and water from clothes washing
LA
L C machines and laundry tubs. It shall not include waste water from kitch-
L c en sinks, dishwashers or laundry water from soiled diapers.
LC Surfacing of graywater means the ponding, running off or other re -
L c lease of graywater from the land surface.
LA
L A J 3 Permit
A It shall be unlawful for any person to construct. install or alter, or cause
L
LLC
A to be constructed. installed or altered. any graywater system in a build -
LC ing or on a premises without first obtaining a permit to do such work
L C Irom the Administrative Authority.
LA J 4 Drawings and Specifications
L A The Administrative Authority may require any orI all of the following in-
t- A formation to be included with or in the plot plan before a permit is issued
for a graywater system:
(a) Plot plan drawn to scale completely dimensioned. showing lot
lines and structures. direction and approximate slope of surface. loca-
tion of all present or proposed retaining walls, drainage channels. water
supply lines. wells. paved areas and structures on the plot. number of
bedrooms and plumbing fixtures in each structure, location of private
sewage disposal system and 100 percent expansion area or building
sewer connecting to public sewer, and location;of the proposed gray -
water system.
(b) Details of construction necessary to ensure compliance with the
requirements of this Appendix together with a lull description of the
complete installation, including installation methods, construction and
materials as required by the Administrative Authority.
L (c) A log of soil formations and ground water level as determined by
LA test holes dug In close proximity to any proposed Irrigation area. topeM-
L A er with a statement of water absorption characteristics of the soil at the
L A proposed site as determined by approved percolation tests. In lieu 01
wv ,. MN
LA
LC
LC
LA
LA
LC
LA
LC
LA
LC
LC
LA
LC
LA
LC
LA
LA
LC
224.2
224.1
GRAYWATER SYSTEMS J 4-J 6
percolation tests, the Administrative Authority may allow the use of
Table J-2, an inliltration rate designated by the Administrative -Authority, ,c%1.
or an inliltration rate determined by a test approved by the Administra- c i
tive Authority. AL
CL
AL
CL
AL
J 5 Inspection and Testing
(a) inspection
(1) All applicable provisions of this Appendix and of Section 318 ACL
L
of the U.P.C. shall be complied with.
(2) System components shall be properly identified as to manulac- c L
turer. Al.
(3) Surge tanks shall be installed on dry, level, well -compacted soil AL
if in a drywell, or on a level, 3 -inch concrete slab or equivalent, it CL
above ground. AL
(4) Surge tanks shall be anchored against overturning. A
L
(5) 11 the irrigation design is predicated on soil tests, the irrigation %1-_
field shall be installed at the same location and depth as the tested c L
area. Al.
(6) Installation shall conform with the equipment and installation A L
methods identified in the approved plans. A L
(7) Graywater stub -out plumbing may be allowed for future con- c L
nection prior to the installation of irrigation lines and landscaping. A 1_
Stub -out shall be permanently marked GRAYWATER STUB -OUT. ( 1:
DANGER —UNSAFE WATER. CL
A1.
CL
(b) Testing AL
(1) Surge tanks shall be filled with water to the overflow line prior ` •
to and during inspection. All seams and joints shall be left exposed c i.
and the tank shall remain watertight. Al.
(2) A flow test shall be performed through the system to the point A L
of graywater irrigation. All lines and components shall be water- A 1 -
tight. CAL
l.
J 6 Procedure for Estimating Graywater Discharge A L
The Administrative Authority may utilize the graywater discharge pro- ,,11-.
cedure listed below, water use records, or calculations of local daily per c L
person interior water use: AL
(a) The number of occupants of each dwelling unit shall be calcu- A L
AL
CL
CL
AL
lated as follows:
First bedroom • 2 occupants
Each additional bedroom 1 occupant
MAYS. ISM
224.3
J 8 GRAYWATER SYSTEMS
LC
(b) The estimated graywater flows for each occupant shall be calcu-
L C lated as follows:
L C Showers, bathtubs and wash basins
LA
LC
LA LaundryLA tics
L
LA ble estimated graywater discharge as provided above and the type o (C) The total number of occupants shall be multiplied by the app -
LC
L A fixtures connected to the graywater system.
E. c J 7 Required Area of Subsurface Irrigation
C
LA
LA Each irrigation zone shall have a minimum effective irrigation area for
L C the type of soil and infiltration rate to distribute all graywater produced
L c daily, pursuant to Section J•6, without surfacin The is required
irrigation
pu� pursuant
L c area shall be based on the estimated graywater
L c to Section J-6 of this Appendix. size of surge tank. or a method deter -
1. A mined by the Administrative Authority. Each proposed graywater sys-
1.
AI. tem shall include at least two irrigation zones and each irrigation zone
Lc
LA shall be in compliance with the provisions of this Section.
L A If the mini-leachlield irrigation system is used. the required square
is c shall be determined from Table J-2, or equivalent, for the type
LA of soil found in the excavation. The area of the irrigation field shall L c:
be
A equal to the aggregate length of the perforated pipe sections within the
L A irrigation zone times the width of the proposed mini-leachlield trench.
Lc
LA No irrigation point shall be within 5 vertical lest of highest known
A seasonal groundwater nor where graywater may contaminate the
g ground water or ocean water.. The applicant shall supply evidence of
ground water depth to the satisfaction of the Administrative Authority
.A
•
A J 8 ' Determination of Irrigation Capacity
.0
A (a) In order to determine the absorption quantities of queshonab e
c soils other than those listed in Table J-2. the proposed site may be sub -
A jected to percolation tests acceptable to the Administrative Authority or
.(;% determined by the Administrative Authority.
t (b) When a percolation test is required. no mini-leachlield system or
• A subsurface drip irrigation system shall be permitted if the test shows the
A absorption capacity of the soil is less than 60 minutes •inch or more rap -
A id than live minutes%inch. unless otherwise permitted by the Adminis-
A trative Authority.
A (c) The irrigation field size may be computed from Table J.2. or de -
A termined by the Administrative Authority or a designee of the Adminis •
LA trative Authority.
25 GPD/occupant
15 GPD/occupant
224.4
DAM 9 X999
GRAYWATER SYSTEMS
J9
J 9 Surge Tank Construction (Figures 1, 2, 3 and 4) AL
(a) Plans for surge tanks shall be submitted to the Administrative CL
A
Authority for approval. The plans shall show the data required by the is
Administrative Authority and may include dimensions. structural cal- A i'.
culations. and bracing details. A 1
I.
(b) Surge tanks shall be constructed of solid. durable materials. not
subject to excessive corrosion or decay. and shall be watertight. A I.
(c) Surge tanks shall be vented as required by Chapter 5 of this fl:
Code and shall have a locking, gasketed access opening, or approved .1
equivalent, to allow for inspection and cleaning. Al.
1
(d) Surge tanks shall have the rated capacity permanently marked ";:
on the unit. In addition. GRAYWATER IRRIGATION SYSTEM. DAN-
GER —UNSAFE WATER shall be permanently marked on the surge . Al.
tank. CI
(e) Surge tanks installed above ground shall have a drain and over- (Al
flow, separate from the line connecting the tank with the irrigation fields ft!l.
The drain and overflow shall have a permanent connection to a sewer n
or to a septic tank. and shall be protected against sewer line backflow AI.
by a backwater valve. The overflow shall not be equipped with a shut- nir
k. is
off valve. Al.
C.
(I) The overflow and drain pipes shall not be less in diameter than ,. :
the inlet pipe. The vent size shall be based on the total graywater fixture AI.
units. as outlined in U.P.C. Table 4.3 or local equivalent. Unions or (,:k1'
equally effective sittings shall be provided for all piping connected to the ,1
surge tank. AI.
(g) Surge tanks shall be structurally designed to withstand antics- A
paced loads. Surge tank covers shall be capable of supporting an earth A
load of not less than 300 pounds per square foot when the tank is de- (/ 1.
signed for underground installation. AI.
(h) Surge tanks may be installed below ground in a dry well on com- n i.
pacted soil, or buried if the tank design is approved by the Administra- n i.
five Authority. The system shall be designed so that the tank overflow A;:
will gravity drain to a sanitary sewer line or septic tank. The tank must c L
be protected against sewer line backflow by a backwater valve. AL
Cl.
(i) Materials "1 .
(1) Surge tanks shall meet nationally recognized standards for tit
nonpotable water and shall be approved by the Administrative Au- CI.
thority. Al.
MAY • /Yi1
224.5
J 9-J 11 GRAYWATER SYSTEMS
LC (2) Steel surge tanks shall be protected from corrosion. both exter-
L C natty and internally. by an approved coating or by other acceptable
L C means.
LA
LC
LA
LC
LA
LC
LA
LC
LA
LC
LA
LC
LA
LC
LA
LC
LA
LA
LC
LA
LC
LA
LC
LA
LC
LA
LC
LA
LC
LA
LC
LA
LC
LA
LC
LA
L C (a)
LC
LA
LC
LA
LC
LC
LC
LA
LC
LA
LA
LC
LA
LA
LC
LA
LA
LA
LC
LA
LC
LA
LA
LA
LC
10 Valves and Piping (Figures 1, 2, 3 and 4)
Graywater piping discharging into a surge tank or having a direct con-
nection to a sanitary drain or sewer piping shall be downstream of an
approved waterseal-type trap(s). If no such trap(s) exists. an approved
vented running trap shall be installed upstream of the connection to
protect the building from any possible waste or sewer gases. All gray -
water piping shall be marked or shall have a continuous tape marked
with the words DANGER —UNSAFE WATER. All valves, including the
three-way valve. shall be readily accessible and shall be approved by
the Administrative Authority. A backwater valve, installed pursuant to
this Code, shall be provided on all surge tank drain connections to the
sanitary drain or sewer piping.
J 11 irrigation Field Construction
The Administrative Authority may permit subsurface drip irrgaton,
mini-leachlield or other equivalent irrigation methods which discharge
graywater in a manner which ensures that the graywater does not sur-
face. Design standards for subsurface drip irrigation systems and mini-
leachfie!d irrigation systems follow:
Standards for a subsurface drip irrigation system are:
(1) Minimum 140 mesh (115 micron) 1 -inch filter with a capacity of
25 gallons per minute, or equivalent, filtration shall be used. The fil-
ter backwash and flush discharge shall be caught, contained and
disposed of to the sewer system, septic tank or, with approval of the
Administrative Authority, a separate mini-leachlield sized to accept
all the backwash and flush discharge water. Filter backwash water
and flush water shall not be used for any purpose. Sanitary proce-
dures shall be followed when handling lifter backwash and flush
discharge or graywater.
(2) Emitters shall have a minimum flow path of 1,200 microns and
shall have a coefficient of manufacturing venation (Cv) of no more
than 7 percent. Irrigation system design shall be such that emitter
flow variation shall not exceed t 10 percent. Emitters shall be rec-
ommended by the manufacturer for subsurface use and graywater
use, and shall have demonstrated resistance to root intrusion. For
emitter ratings, refer to irrigation Equipment Performance Report,
Drip Emitters and Micro -Sprinklers, Center for irrigation Technolo-
w►Y S. MI
224.6
GRAYWATER SYSTEMS J 11
J 11-J 13 GRAYWATER SYSTEMS
gy. California State University, 5730 N. Chestnut Avenue. Fresno. A;:
California 93740-0018. CL
Al.
(3) Each irrigation zone shall be designed to include no less than A 1•
the number of emitters specified in Table J•3, or through a proce- (1.k{:
dure designated by the Administrative Authority. Minimum spacing (A:1 -
between emitters is 14 inches in any direction. ( l.
l.
(4) The system design shall provide user controls. such as valves. A
switches. timers and other controllers, as appropriate. to rotate the A L
distribution of graywater between irrigation zones. (: I
(5) All drip irrigation supply lines shall be PVC Class 200 pipe or A
better and Schedule 40 fittings. All joints shall be properly glued, ( L
inspected and pressure tested at 40 psi. and shown to be drip tight ^ }
for live minutes. before burial. All supply lines will be buried al least "1:
8 inches deep Drip feeder lines can be poly or flexible PVC tubing ^ is
and shall be covered to a minimum depth of 9 inches. Al
(6) Where pressure at the discharge side of the pump exceeds 20 %. 1.
psi. a pressure -reducing valve able to maintain downstream pres -
sure no greater than 20 psi shall be installed downstream from the
pump and before any emission device.
(7) Each irrigation zone shall include an automatic flush valve/vac-
uum breaker to prevent back siphonage of water and soil.
(b) Standards for the mini-leachlield system are (Figure 5):
(1) Perforated sections shall be a minimum 3 -inch diameter and
shall be constructed of perforated high -density polyethylene pipe,
perforated ABS pipe, perforated PVC pipe. or other approved ma-
terials. provided that sufficient openings are available for distribu-
tion of the graywater into the trench area. Material, construction
and perforation of the piping shall be in compliance with the ap-
propriate absorption field drainage piping standards and shall be
approved by the Administrative Authority.
(2) Clean stone. gravel or similar filter material acceptable to the
Administrative Authority. and varying in size between 34 inch to
21.2 inches shall be placed in the trench to the depth and grade re- i is
quired by this Section. Perforated sections shall be laid on the filter 1,‘•::
material in an approved manner. The perforated sections shall then (" L
be covered with filter material to the minimum depth required by this f,.1.
Section. The filter material shall then be covered with landscape lit- A is
ter fabric or similar porous material to prevent closure of voids with A 1
earth backlit!. No earth backfill shall be placed over the filter materi- A is
al cover until alter inspections and acceptance. A i.
MAY 9. (9M
224.7
Al.
Al.
CI
AI.
(' I
Al.
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Al
CI.
Al.
Cl.
Al.
Al.
( I.
Al.
Cl.
AL
CL
Al.
Al
(• 1.
AI.
(' I
Al.
Cl.
AI.
('I
I.c
LA
LC
LA
1.0
1.A
LC
LA
LC
LA
1. ('
I.A
.0
I.A
L (•
LA
.A
.A
.i
.A
A
.A
.0
A
A
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A
A
A
A
A
A
A
A
A
A
A
A
A
A
.c
A
LC
LA
(3) Irrigation fields shall be constructed as follows:
Minimum
Number of dram ones per irrigation zone 1
Length of each perforated !(ne
Bottom width of trench
Total depth of trench
Spacing of lines. center to center
Depth of earth cover of fines
Depth of filter material cover of ones
Depth of filter material beneath lines
Grade of perforated lines
6 inches
17 inches
4 feet
9 inches
2 inches
3 inches
level 3 inches/ 100 feet
Maximum
100 feet
18 inches
18 inches
J 12 Special Provisions
(a) Other collection and distribution systems may be approved by
the Administrative Authority as allowed by Section 201 of the U. PC.
(b) Nothing contained in this Appendix shall be construed to prevent
the Administrative Authority from requiring compliance with stricter re-
quirements than those contained herein. where such stricter require-
ments are essential in maintaining sale and sanitary conditions or from
prohibiting graywater systems.
J 13 Health and Safety
(a) Graywater may contain fecal matter as a result of bathing andior
washing of diapers and undergarments. Water containing fecal mater.
it swallowed. can cause illness in a susceptible person.
(b) Graywater shall not include laundry water from soiled diapers.
(c) Graywater shall not be applied above the land surface or allowed
to surface and shall not be discharged directly into or reach any storm
sewer system or any water of the United States.
(d) Graywater shall be not be contacted by humans. except as re-
quired to maintain the graywater treatment and distribution system.
(e) Graywater shall not be used for vegetable gardens.
224.8
MAY 9. ISM
GRAYWATER SYSTEMS
Table J-1 Location of Graywater System
Minimum Horizontal Distance From
Surge
Tank
(feet)
Irrigation
Field (feet)
Buildings or structures'
52
83
Property line adjoining private property
5
5
Water supply wells4
50
100
Streams and lakes
50 .
50
Seepage pits or cesspools
5
5
Disposal field and 100 percent expansion
area
5
45
Septic tank
0
56
On -site domestic water service line
5
57
Pressure public water main
10
108
Water ditches
50
50
NOTES: When mini -leach fields are installed in sloping ground, the minimum Itonzontal C L
distance between any part of the distribution system and ground surface shall be 15 t
feet. C
'Including porches and steps. whether covered or uncovered. but does not include car. A
ports, covered walks, driveways and similar structures. A L
nhedrslance may be reduced to 0 feet for aboveground tanks if approved by the Adminis- C L
!relive Authority. C I
3Thedistance may be reduced to 2 feet. with a water barrier. by the Administrative Author. A L
ny, upon consideration of the sod expansion index. A L
*Where special hazards are involved. the distance may be increased by the Administra. (a: 1-
tive Authority. . CI:
5Applres to the mrni•leachheld type system only. Plus 2 feet for each additional toot of C L
depth in excess of 1 foot below the bottom of the dram line. A L
CI.
•Applies to minr•leachlreld•type system only. A 1.
7442•foot separation is required for subsurface drip systems A L
•For parallel construction or for crossings, approval by the Administrative Authority shall A L
be required. C L
TABLE J-1
CL
AL
CL
AL
CL
AL
CL
AL
CL
A
c
A
c
A
c
A
c.
A
c
A
c
A
c
A
C
A
cl.
AL
C I.
A 1.
(' L
AL
L
L
L
L
L
L
L
1.
L
L
L
L
L
L
MAYS. 1 1M
_ A Table J-2
C
LA
LC
LA
LC
LA
LC
LA
LC
LA
LC
LA
LC
LA
LA
LI. C
LA
LC
I. A
LC
LA
LC
LA
1. C
LA
LC
I. A
I.0
LA
LC
LA
I.0
LA
LC
I. A
LA
LC
I. A
I.0
LA
LC
LA
1_ C
LA
LC
LA
LC
LA
LC
LA
LC
LA
LA
LC
LA
LC
1. A
1.
2.
3.
4.
5. Clay with considerable
sand or gravel
6. Clay with small
amount of sand or
gravel
TABLES J-2 and J-3
Mini-Leachfleld Design Crlterla of Six Typical Soils
Maximum absorp-
►ion capacity, min-
utes per inch, of
irrigation area for a
24 -hour period
5
GRAYWATER SYSTEMS
Minimum sq. R. of
irrigation area per
100 gallons of esti-
mated graywater
Type of Sol discharge per day
Coarse sand or gravel 20
Fine sand 25
Sandy loam 40
Sandy clay 60
90
120
Table J-3 Subsurface Drip Design Criteria
of Six Typical Solis
Type of Solt
1. Sand
2. Sandy loam
3. Loam
4. Clay loam
5. Silty clay
6. Clay
Maximum
emitter
discharge
(gavday)
1.8
1.4
1.2
0.9
0.6
0.5
12
18
24
48
60
Minimum number
of emitters per gpd
of graywater
production
06
0.7
09
1. 1
1.6
2.0
Use the daily graywater flow calculated in Section J-6 to determine the
number of emitters per line. •
wv• oIM
224.9
224.10
FIGURE 1
GRAYWATER SYSTEMS
FIGURE 2
GRAYWATER SYSTEMS'
la.
Screened vent
CL
AL
CL
AL
CL
AL
3/32" mesh A L
CL
CL
CL
AL
AL
CL
AL
CL
AL
Locking Cover (access) A L
CL
AL
Inlet I / / Approved water tight tank CCL
L
Union or equal (TYP)
Vent shall be within
trap ones distance o/
wain tress
&aywsear
source
/.��►:� �'�f'1' / CL
L
IN'/FT `% r- / C L
• mann+, n Graywetv Fullway Valve A L
trap. (ro Valve hat atioa S ( L
if required A L
San Tee Fullway C L
Grade Vat bier A L
==w Uasafe Water er Grade A L
(: L
AL
Drain (N.C.) ` saga C L
.► A L
C/O Y COMMA Pad To Irrigation system A LL
1▪ N•/FT or equivalau Minimum of two A L
animism lines required C L
To building drain. sewer. A L
or septic tank. i/ any C L
AL
C L
AL
C I.
AL
CL
AL
CL
AL
CL
AL
CI.
AL
CL
AL
AL
CL
AL
CL
AL
CL
Al.
(' L
Figure 1—Graywater System Single Tank —Gravity (conceptual) A L
VTR a Id above grde
(support required)
3 -way valve
MAY a 1994
C/O Cita/lout
N.C. Normally Closed
VTR Vent That Roof
LC
LA
LC
LA
LC
LA
LC
LA
LA
LC
LA
LC
LC
LA
LC
L A Vent shall be within
trapL A P antes distance o/
L C gunning trap
LA
LA
LC
LA
L C Graywater
LA
L Ce
LA+r
LC
L A 1/4'/FT
LA
LC
LA
LA
LC
LA
LC
LA
LC
LC~
LLC
LA
LC
L C sewer. or septic tank
I. A
LC
LA
LC
LA
LC
LA
LC
LA
LC
LA
LC
LA
LC
LA
LC
LA
LC
LA
LC
LA
I. C
I. A
LC
LA
A L Figure 2—Graywater System Single Tank —Pumped (conceptual)
P
Vented running
if required
Grade
VTR or BY above grade
(support sum )
San Toe
3 -way valve
1/4"/FT Backwater Valve
To building drain.
224.11 224.12
Inlet
Pump
AbineY1ntions
GO Cleanout
N.C. Normally Closed
VTR Vent That Roof
Screened vents
3/32" or less
Appoved warm tight tank with locking cover
Backwasm Valve
Showoff valve
3" Concrete Pad
or equivalent
Mimi or equal
Grade
To 4rigatron system
Maims= of two
irrigation lives required
MAY 9 tape
Vent shall be
within trap arm A
distance of
running trap
Screened vents
3/32" mesh
N.
VTR or 10' above grade
(support required)
.way ‘ alve
Graywater
source
Vented running trap,
if required
Grade San Tee
I/4"/FT Backwater Valve
To building drain,
sewer, or septic tank
Vent shall be within
trap arm distance of
running trap
Vented running trap.
if required
Graywater
source 1/4'/FT
Grad
Wye & 1/8 Bend
Backwater Valve
1/4"/Fr
To building drain.
sewer, or septic tank
Inlet
Drain (N.C.)
C/O
6" above top of
highest tank
3" Concrete Pad
or equivalent
Abbreviatio0i
C/O Cleanout
N.C. Normally Closed
VTR Vent Thru Roof
Union or equal
Locking Cover
Approved water tight
/ tank
Fullway Valve
Grade
To Irrigation system
Minimum of two irrigation
lines required
Figure 3—Graywater System Multiple Tank (conceptual)
Screened vent
3/32' mesh
VTR or 10' above grade
(support required)
3 -way valve
Inlet
1/4"/FT /
Overflow
C/O (no vent)
Capped drain
Union or equal
o
Abbreviation
C/O Cleanout
VTR Vent Thru Roof
Backwater Valve
Shut-off valve
/ To Irrigation system
Minimum of two irrigation
lines required
Grade \V
Locking cover
Water tight tank approved
for underground use
Pump
Sign on top of tank
Graywater Irrigation System
DANGER
UNSAFE WATER
Figure 4—Graywater System Underground Tank (conceptual)
CL
AL
AL
CL
AL
AL
CL
AL
CL
AL
AL
CL
AL
AL
CL
AL
CL
CL
CL
CL
AL
CL
CL
AL
CL
AL
CL
AL
CL
AL
CI.
AL
CL T
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AL C
AL m
CL
SW3ISAS 831VMAVFl9
AL
f
CL r.
AL
AL M
L AA
AL
CL
AL
CL
CL
AL
CL
CL
AL
CL
CL
AL
CL
AL
AL
AL
CL
CL
CL
CL
AL
CL
AL
AL
CCL
SIARLSAS !l31VMAVUC
iq
Grade
9 -
To public_
sewer
Soil
3- (minimum) perforated pipe section
Figure 5—Graywater System Irrigation Layout (conceptual)
Gravel
filter fabric
or equivaknt 17" Min.
Note: each irrigation zone
shall have a minimum effec-
tive irrigation area based on
Section 1-7..
°4e
CL
AL
AL
AL
CL
CL
CL
AL
CL
AL
CL
AL
CL
AL
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AL
CL
AL
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7
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AL
SW31SAS U31VNUldWWO
CITY OF ROLLING HILLS
PROOF OF SERVICE BY MAIL AND POSTING
STATE OF CALIFORNIA
SS
COUNTY OF LOS ANGELES
I am a citizen of the United States. I am over the age of eighteen years and not a party to
the within proceeding; my business address is 2 Portuguese Bend Road, Rolling Hills,
California.
On the 9' day of ,1995
I serve the within „/Ab?,
a copy of which is annexed hereto and made a part hereof, on the person, or persons,
named below by placing a true copy thereof enclosed in a sealed envelop with postage
thereon fully prepaid, in the United States mail at Rolling Hills, California addressed as
follows:
FAXED MAILED DELIVERED
Palos Verdes City Attorney City Manager
Peninsula News City Council
Also posted at City Hall.
I certify (or declare) under penalty of perjury, that the foregoing is true and correct.
Executed on the ,. day of 9e,,71, , 1995 at Rolling Hills, California.
MARILYN L. KERN
DEPUTY CITY CLERK
Cuy o/ eo PP,.9 Jllf,
INCORPORATED JANUARY 24, 1957
NO. 2 PORTUGUESE BEND ROAD
ROLLING HILLS, CALIF. 90274
(310) 377-1521
FAX: (310) 377.7288
NOTICE OF PUBLIC HEARING BEFORE THE
CITY COUNCIL OF THE
CITY OF ROLLING HILLS, CALIFORNIA
NOTICE IS HEREBY GIVEN, that the City Council of the City of Rolling Hills will
hold a Public Hearing at 7:30 PM on Monday, July 24, 1995 in the Council Chambers
of City Hall, 2 Portuguese Bend Road, Rolling Hills, CA for the purpose of receiving
public input regarding the following proposed ordinance:
AN ORDINANCE OF THE CITY OF ROLLING HILLS ADOPTING BY
REFERENCE THE GRAYWATER STANDARDS, APPENDIX J OF THE
UNIFORM PLUMBING CODE, 1991 EDITION, AS AMENDED MAY 1,
1994, AND AMENDMENTS THERETO; LOS ANGELES COUNTY
CODE, PLUMBING CODE, TITLE 28, AND AMENDMENTS THERETO;
AND AMENDING PORTIONS OF CHAPTER 15.08 OF THE ROLLING
HILLS MUNICIPAL CODE.
The purpose of the ordinance is to permit and regulate the construction, alteration
and repair of graywater systems for underground irrigation of trees and other deep-
rooted plants in residential occupancies only.
Any person is welcome to review the proposed ordinance and Title 28, Plumbing
Code of the Los Angeles County Code, prior to the public hearing at the City Hall
Administration Building located at 2 Portuguese Bend Road, Rolling Hills, CA.
At said time and place all persons who desire to be heard with respect to the
proposed ordinance may appear before the City Council and be heard thereon.
Dated: July 1, 1995
CITY CLERK
CITY OF ROLLING HILLS
Publish in Rolling Hills Herald and Palos Verdes Peninsula News July 1, 1995.
®Printed on Recycled Paper.
coy a/ RO//L �ae�
INCORPORATED JANUARY 24, 1957
DATE: G - 24-9T
TO: (l ett;
fiho msgwAs
NO. 2 PORTUGUESE BEND ROAD
ROLLING HILLS. CALIF. 90274
(3101377.1521
FAX 1310) 377.7288
FAX COVER SHEET
TIME SENT: 12; o
FROM: 440 /e_. 'rg4,14,.
FAX: OPERATOR M e//„4 —a
SUBJECT: P/4241 AGE GZL.t� '" Cara �4--
REMARKS:
TOTAL PAGES (including cover sheet):
2
The City of Rolling Hills uses a Savinfax Model 300 telecopier as its primary telecopier.
It is compatible with Group 1, 2 and 3 telecopy machines. If you have difficulty receiving
any pages, please telephone our switchboard at (310) 377.1521
REPLY TO: City of Rolling Hills • Fax No. (310) 377-7288
PROOF OF PUBLICATION
(2015.5 C.C.P.)
STATE OF CALIFORNIA,
COUNTY OF LOS ANGELES,
I am a citizen of the United States and a
resident of the County aforesaid; I am over the
age of eighteen years, and not a party to or
interested in the above -entitled matter. I am the
principal clerk of the printer of the
Palos Verdes Peninsula News
and Rolling Hills Herald
a newspaper of general circulation, printed and
published semi—weekly
in the City of Rolling Hills Estates
County of Los Angeles, and which newspaper
has been adjudged a newspaper of general
circulation by the Superior Court of the County
of Los Angeles, State of California, under the
date of October 15 , 19 63
Case Number C 824957 ; that the
notice, of which the annexed is a printed copy
(set in type not smaller than nonpareil), has
been published in each regular and entire issue
of said newspaper and not in any supplement
thereof on the following dates, to -wit:
!ul
y
all in the year 19 "1 c
I certify (or declare) under penalty of perjury
that the foregoing is true and correct.
Dated at Rolling Hills Estates
California, this 1 day o, 19
SLr tAiLS tU "
Signature
This space is fot e/o t} ll¢r ',ti lin Stamp
tti 15 1J [V./
AUG 101995
CITY OF ROLLING HILLS
By
Proof of Publication of
Tp•Ltii)Ii`c -1401411
R.H.H. No. 4542
NOTICE OF PUBLIC HEARING BEFORE THE
CITY COUNCIL OF THE
CITY OF,ROLLING HILLS, CALIFORNIA
NOTICE IS HEREBY GIVEN, that the City Council of
the City of Rolling Hills will hold a Public Hearing at
7:30 PM on Monday, July 24, 1995 in the Council
Chambers of City Hall, 2 Portuguese Bend Road,
Rolling Hills, CA for the purpose of receiving public
input regarding the following proposed ordinance:
AN ORDINANCE OF THE CITY OF ROLLING
HILLS ADOPTING BY REFERENCE THE GRAY -
WATER STANDARDS, APPENDIX J OF THE
UNIFORM PLUMBING CODE, 1991 EDITION,
AS AMENDED MAY 1, 1994, AND AMEND-
MENTS THERETO; LOS ANGELES COUNTY
CODE; PLUMBING CODE, TITLE 28, AND
AMENDMENTS THERETO; AND AMENDING
PORTIONS OF CHAPTER 15.08 OF THE
ROLLING HILLS MUNICIPAL CODE.
The purpose of the ordinance is to permit and regu-
late the construction, alteration and repair of graywater
systems for underground irrigation of trees and other
deep-rooted plants in residential occupancies only.
Any person is welcome to review the proposed ordi-
nance and Title 28, Plumbing Code of the Los Angeles
County Code, prior to the public hearing at the City Hall
Administration Building located at 2 Portuguese Bend
Road, Rolling Hills, CA.
At said time and place all persons who desire to be
heard with respect to the proposed ordinance may ap-
pear before the City Council and be heard thereon.
Dated: July 1, 1995 CITY CLERK
CITY OF ROLLING HILLS
Published in the Rolling Hills Herald and Palos Verdes
Peninsula News on July 1, 1995.
C1iy o/n Peg
INCORPORATED JANUARY 24, 1957
NO. 2 PORTUGUESE BEND ROAD
ROLLING HILLS, CALIF. 90274
(310) 377.1521
FAX: (310) 377-7288
November 17, 1994
Ms. Lata Thakar
District Engineer
L.A. County Dept. of Public Works
Building and Safety Division
24320 S. Narbonne Avenue
Lomita, CA 90717
SUBJECT: GREY WATER
Dear Lata:
Enclosed is a City of Malibu staff report and proposed ordinance. We would
appreciate your review of their proposal in light of the fact that the cities have
somewhat similar topography and environmental concerns (i.e., the beachfront in
Malibu and the Flying Triangle Landslide Area in Rolling Hills).
An early response will be appreciated. Feel free to call me at (310) 377-1521.
LOLA UNGAR
PRINCIPAL PLANNER
cc: Mr. Craig Nealis, City Manager
®Printed on Recycled Paper.
City olleollin
INCORPORATED JANUARY 24, 1957
THOMAS F. HEINSHEIMER
Mayor
GODFREY PERNELL
Mayor Pro Tem
FRANK E. HILL
Councilmember
B. ALLEN LAY
Councilmember
JODY MURDOCK
Councilmember
October 12, 1994
Ms. Lata Thakar, District Engineer
Los Angeles County
Department of Building & Safety
24320 Narbonne Avenue
Lomita, CA 90717 °
Dear Ms. Thakar:
NO. 2 PORTUGUESE BEND ROAD
ROLLING HILLS, CALIF. 90274
(310) 377-1521
FAX: (310) 377-7288
At the Regular City Council Meeting held Monday, October 10, 1994, City
Councilmembers 'directed staff to carefully review Los Angeles County Chapter 14
Uniform Building' Code, relating :to grey water uses.
In the interim, it is our understanding that the California Plumbing Code Grey
Water Standards will take effect on November 1, 1994. It is also our understanding.
that the City of Rolling Hills will fall under these guidelines, since we have not
adopted the County Plumbing Code with grey water provisions..
Based upon input from our City Attorney, we will be proposing a modified
Ordinance sometime after November 1, 1994.
We will be soliciting your assistance in reviewing the County Code as it relates to
Rolling Hills. For example, it is our understanding that the provisions do not allow
for the establishment of a grey water system in areas of geological instability.
Clearly, this may not relate to the City of Rolling Hills since a grey water system
would in all likelihood reduce the amount of fluid introduced to the soil since
Rolling Hills homes are on septic systems.
Principal Planner Lola Ungar will be contacting you in the near future to arrange a
meeting to review the grey water regulations. We would appreciate your assistance
this regard.
®Printed on Recycled Paper
Page 2
Mr. Jim Fry, head of the Los Angeles County Mechanical and Plumbing Section, did
an outstanding job in presenting information on grey water systems to the City
Council on October 10th. We appreciated his assistance.
Should you wish to discuss this further, please do not hesitate to call.
Sincerely,
4i44
Craig R. Nealis
City Manager
CRN:mlk
greywater.ltr
cc: City Council
Lola Ungar, Principal Planner
Mr. Jim Fry
C1iy o/ leo elin
. D
INCORPORATED JANUARY 24, 1957
THOMAS F. HEINSHEIMER
Mayor
GODFREY PERNELL
Mayor Pro Tern
FRANK E. HILL
Councilmember
B. ALLEN LAY
Councilmember
JODY MURDOCK
Councilmember
October 11,1994
Mr. Jim Fry
Los Angeles County
Department of Public Works
Mechanical & Plumbing Section
P.O. Box 1460
Alhambra, CA 918024160
Dear Mr. Fry:
NO. 2 PORTUGUESE BEND ROAD
ROLLING HILLS, CALIF. 90274
(310) 377-1521
FAX: (310) 377-7288
Thank you for your attendance at the Regular Rolling Hills City Council Meeting
held Monday, October 10, 1994. We appreciate you taking time out of your busy
schedule to provide information at the City Council Meeting.
You did an outstanding job representing the County. You are certainly well versed
in the grey water area. We will more than likely look for assistance from you in
reviewing the County Code in the immediate future.
Thank you again for attending our City Council Meeting.
Sincerely,
Craig R. Nealis
City Manager
CRN:mlk
fry.ltr
cc: Lola Ungar, Principal Planner
h
ii
Printed on Recycled Paper.
Ciiy o/ /e0fA4
INCORPORATED JANUARY 24, 1957
AGENDA ITEM 8D
MEETING DATE: OCTOBER 10, 1994
TO:
NO. 2 PORTUGUESE BEND ROAD
ROLLING HILLS, CALIF. 90274
• (310) 377.1521
FAX: (310) 377-7288
HONORABLE MAYOR AND MEMBERS OF THE CITY
COUNCIL
ATTENTION: CRAIG R. NEALIS, CITY MANAGER
FROM: LOLA M. UNGAR, PRINCIPAL PLANNER
SUBJECT: GREY WATER USES AUTHORIZED BY CHAPTER 14
OF THE COUNTY PLUMBING CODE
BACKGROUND
Councilmember Jody Murdock inquired about Grey Water Uses in the City of -
Rolling Hills after reading an article about the City of Los Angeles' adoption of a
grey water ordinance. We have also received a letter from Dr. James N.
Scharffenberger (attached) who is interested in the construction of such a system.
The use of grey water for irrigation has long been a topic of interest because the lack
of potable water has always been a problem in the Southern California area. Each
year, water from Northern California and the Colorado River becomes more costly
and scarce.
On July 14, 1992, Governor Pete Wilson signed legislation directing the Department
of Water Resources with the help of the Department of Health Services to develop
grey water use regulations that protect public health while maximizing landscape
irrigation efficiency. In May, 1994, the California Building Standards Commission
approved the Graywater Standards as part of the California Plumbing Code that will
take effect throughout the state on November 1, 1994.
Grey water is defined as used household waste water which has not come into
contact with toilet waste, soiled diapers or similar waste. Grey Water includes
used water from bathtubs, showers, bathroom wash basins, and water from
clothes washing machines and laundry tubs that do not receive diapers. It shall
not include waste water from kitchen sinks or dishwashers.
®Pnnten on P,-.:;rtr.ed Pa�t2,
GREY WATER USES
PAGE2
The City of Rolling Hills adopted The County's Uniform Plumbing Code, 1991
Edition, and Amendments thereto, Title 28 on June 11, 1992. At that time, the City's
Ordinance No. 237 did not adopt Chapter 14 (Grey Water Systems for Residential
Occupancies)(attached) that was incorporated into the County Plumbing Code in
anticipation of the State Standards and became effective on November 29, 1992.
(Note: The State of California
"Graywater Systems" as used
Plumbing Code while the County
their literature and Plumbing
interest of uniformity).
Department of Water Resources' spelling is,
in State literature and the California
uses the spelling, "Grey Water Systems" in
Code. We will be usingthe latter in the
Chapter 14 includes specific standards for the construction, alteration and repair of
Grey Water Systems used for landscape irrigation. Generally, Grey Water Systems
require plans and a •Plumbing Permit that adhere to the following standards:
(a) Only permitted in residential occupancies with no connection to any potable
water system;
Location, soil porosity, and ground water level determine the type of system;
The system must be located on the same lot as the residence and minimum
distances from buildings, property lines, septic tanks, etc., must be adhered to;
(d) No grey water system will be permitted unless there is sufficient lot area or
proper soil conditions;
(e) No grey water system will be permitted in geologically sensitive areas;
(f) Existing or proposed sewage disposal systems shall not be decreased or affected
by the grey water system; and
The seller of real property must disclose the existence of the system in
writing, the definition of grey water, the fixtures connected to the system, the
location of all disposal/irrigation fields and the Chapter requirements.
We have talked with Ms. Lata Thakar, District Engineer, about the number of
permits issued by the County's Lomita office and learned that none have been
issued at her office, nor have any Rolling Hills residents applied.
Although the State gives options to local jurisdictions, if the City Council would
like to begin permitting the installation of grey water systems it is necessary that we
adopt the attached County standards.
(b)
(c)
(g)
GREY WATER USES
PAGE 3
Mr. Jim Fry, Head of the Los Angeles County Mechanical & Plumbing Section, will
be in attendance at the meeting this evening to answer any questions regarding grey
water use.
RECOMMENDATION
It is recommended that the City Council direct staff to prepare an ordinance
adopting. Chapter 14 (Grey Water Systems for Residential Occupancies) of the
County Plumbing Code by reference.
James N. Scharffenberger, M.D., Inc.
Obstetrics, Gynecology and Infertility
20911 fin Street
Suite
Torrance. CA
. 90507
12171770.7277
citz.aqtt
"Ire.culoCc•Lo.._,%
vvx\ uutAa- visJuLt-tf,d
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ol,Lans ct4Ad1 a— Uck2.ual-€.4.'
n,-wet+a_oV outiez.. ,
/0...Ltr.etrAb Nor Alkuxd
tu+T towvta. Qevin
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James N. Scharffenberger, M.D., Inc.
Obstetrics, Gynecology and Infertility
TimeQ-- cj (zi ler./
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•
•
�r� �''. •!' . f yY s'' 6 ,c S.. ,;Z'i ty_ ., :, a • :i.%1:'.: ; •. s` '
ec cled ., or Home LandscapingOKd ..
Y
',Conservation: LA: City ..ounc« �, .: .
:' City Councilwoman Ruth Painter, the chief- proponent
• ordinance to allow filtration Systefl]S.:AIC e,to.. ' of the measure, said that .a••test system installed at her
• 'Venice home has cut'her water bills in half. "And now I
0 dissenter predicts `environmental d•
isaster.':'-... ;.don't even have to think about my trees," she added. "I just
;ii.. - #44;':"- '1;1 :i."-';'11'' • go out and pick the avocados."
I.
•
ByJAMESRAINEY%..'.
TIMES STAFF WRITER
Angelenos will be permitted•to use recycled water from
their. bathtubs, sinks and washing machines 'to- water the
family'garden -under an ordinance approved Tuesday -by
the Los Angeles City Coundil: ' 1'•' `Y
• The' residential "gray -Water" ordinance creates' a strict
,stet of guidelines for installing plumbing and filtration
20911 Earl Street
Suite 480
Torrance. CA
90503
(310) 370.7277
= Systems for home water recycling can cost from several ---
• hundred dollars to as much as $5,000. Proponents argue
that the equipment quickly pays for itself in lower water
.bills.
Galanter said the systems will also reduce'water usage in
t the drought -prone city and help spur a new industry for
designers and installers. •
"Living in a desert, we cannot afford to use water only
Please see WATER, BP
LOS ANGELES TIMES
WATER: Home Recycling Plan
• Continued from B1
once," Galanter said, adding that
water from Northern California
and the Colorado River is becom-
ing increasingly costly and scarce.
The path for the city's legislation
was cleared in the last year when
the state Building Standards Com-
mission added gray water systems
to the Uniform Building Code.
The council Tuesday essentially
agreed to impose the state code in
Los Angeles.
Not everyone is convinced the
gray water systems are a good
idea. Councilman Hal Bernson cast
the lone vote against the ordi-
nance. Bernson deputy Francine
- Oschin said the law will lead to a
proliferation of poorly installed and
maintained filtration that will
"send hair dye, bleach and deter-
gents into our back yards."
She said the result will be an
"environmental disaster."
Los Angeles, Santa Barbara and
San Luis Obispo counties all have
ordinances permitting gray water
systems. Santa Barbara County,
where water shortages are the
routine, even requires them for
new homes on larger lots. The Los
Angeles County law applies only in
unincorporated areas. Many other
communities, schools and other
institutions use reclaimed water —
sewage that has been treated —to
water parks, golf courses and road-
way landscaping.
'erfi6;t aveiglal
GREY WATER SYSTEMS 1401
CHAPTER 14
GREY WATER SYSTEMS FOR RESIDENTIAL OCCUPANCIES
Section 1401 —Grey Water Systems (General)
(a) The provisions of this chapter shall apply to the construction, alteration
and repair of grey water systems for underground landscape irrigation of
trees and other deep-rooted plants. Installations shall be allowed only in
residential occupancies. The system shall have no connection to any potable
water- system on the premises and shall not result in any ponding or surfacing
of the grey water. Except as otherwise provided for in this chapter, the
provisions of this Code shall be applicable to grey water installations.
(b) The type of system shall be determined on the basis of location, soil
porosity, and ground water level and shall be designed to receive all grey
water connected to the system .from the residential building. The system,
except as otherwise approved, shall consist of storage tank(s) which
discharge into subsurface disposal/irrigation fields.
(c) No grey water system, or part thereof, shall be located in any lot other than
the lot which is the site of the building or structure which discharges the grey
water; nor shall any grey water system or part thereof be located at any point
having less than the minimum distances indicated in Table 14-1.
(d) When there is insufficient lot area or improper soil conditions for
adequate disposal of the grey water, as determined by both the Administra-
tive Authority and the Health Officer, no grey water system shall be
permitted. No permit for any grey water system shall be issued until
engineering data and test reports satisfactory to the Administrative Author-
ity and the Health Officer have been submitted and approved.
(e) No permit shall be issued for a grey water system on any property in a
geologically sensitive area as determined by the Administrative Authority.
(f) Private sewage disposal systems existing or to be constructed on the
premises shall comply with Appendix I of this Code. In addition, appropriate
clearances from the grey water systems shall be maintained as provided in
Table 14-1. The capacity of the private sewage disposal system, including
required future areas, shall not be decreased or otherwise affected by the
existence of proposed installation of a grey water system servicing the
premises. •
(g) Any seller of real property on which a grey water system has been
installed and not subsequently removed shall notify the buyer of said
property in writing, prior to the completion of the sale; of the existence of the
grey water system, the definition of grey water, the fixtures connected to the
system, the location of all disposal/irrigation fields and the requirements of
this chapter.
150.1
1402-1405 UNIFORM PLUMBING CODE
L Section 1402 —Definition
L Grey Water —Grey water is used household water which has not come into
A contact with toilet waste, soiled diapers, or similar waste. Grey water includes
A used water from bathtubs, showers, bathroom wash basins and water from
A clothes washing machines and laundry tubs that do not receive diapers. It
A L shall not include waste water from kitchen sinks or dishwashers.
L
AL Section 1403 —Permit
A It shall be unlawful for any person to construct, install or alter, or cause to be
A constructed, installed or altered any grey water system in a building or on a
A premises without first obtaining a permit to do such work from the
L Administrative Authority. The cost of such permit shall be equal to that
L required for private sewage disposal systems as provided in Table II of Section
LA
59 of this Code. A plan check fee shall also be required for each application for
t permit. The plan check fee shall be equal to the permit fee.
L
A
L Section 1404 —Drawings and Specifications
A The Administrative Authority or the Health Officer may require any or all of
L the following information before a permit is issued for a grey water system or
A at any time during the construction thereof.
A (a) Plot plan drawn to scale completely dimensioned, showing direction and
A approximate slope of surface, location of all present or proposed retaining
A walls, drainage channels, water supply lines or wells, paved areas and
AL structures on the plot, number of bedrooms and plumbing fixtures in each
L structure, location of private sewage disposal system or building sewer
L connecting to public sewer and location of the grey water -system with relation
A L to lot lines and structures.
A (b) Details of construction necessary to assure compliance with the require -
L
A ments of this chapter together with a full description of the complete
A installation, including quality, kind and grade of all materials, equipment,
AL construction, workmanship and methods of assemblyand installation.
• (c) A log of soil formations and ground water level as determined by test
L holes dug in close proximity to any proposed disposal/irrigation field,
L together with a statement of water absorption characteristics of the soil at the
L proposed site as determined by approved percolation tests.
A
A Section 1405 —Inspection and Testing
LA (a) Inspection:
(1) All applicable provisions of this chapter and of Section 318 of
A this Code shall be complied with.
(2) System components shall be properly identified as to manufac-
A
L turer.
(3) Storage tanks shall be installed on dry, level, well -compacted
soil, if underground, or on a minimum 3 -inch concrete slab if above
ground.
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150.2
GREY WATER SYSTEMS 1405-1407
(4) If design is predicated on soil tests, the system shall be installed
at the same location and depth as the tested area.
(b) Testing:
(1) Storage tanks shall be filled with water to the overflow line prior
to requesting inspection. All seams and joints shall be left exposed
and the tank shall remain watertight.
(2) A flow test shall be performed through the system to the point of
grey water disposal. All lines and components shall be watertight.
Section 1406 —Procedure for Estimating Grey Water Discharge
(a) The number of occupants of each dwelling unit shall be calculated as
follows:
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First bedroom 2 occupants A
Each additional bedroom 1 occupant A
(b) The estimated grey water flows for each occupant shall be as follows: A
(1) Single Family Dwelling L
Showers, bathtubs and wash basins 25 GPD/occ.
Laundry wastes 15 GPD/occ.
(2) Multi -family Dwelling (each dwelling unit) L
Showers, bathtubs and wash basins 20 GPD/occ. A
Laundry wastes 10 GPD/occ. A
(c) The total number of occupants shall be multiplied by the applicable
estimated grey water discharge as provided above, based on the type of
dwelling unit(s) and the type of fixtures connected to the grey water system.
EXAMPLE 1.
Single-family dwelling, 3 bedrooms with showers, bathtubs, wash
basins and laundry facilities all connected to the grey water system:
Total number of occupants = 2 + 1 + 1 = 4
Estimated grey water flow = 4 x (25 + 15) = 160 GPD
EXAMPLE 2.
Multifamily building with 3 two -bedroom units with only laundry
wastes connected to the grey water system:
Total number of occupants = 3 x (2 + 1 ) = 9
Estimated grey water flow = 9 x (10) = 90 GPD
Section 1407 —Required Area of Subsurface Disposal/Irrigation Fields
(Fig. 4)
Each valved -off area shall have a minimum effective leaching/irrigation area
in square feet as determined by Table 14-2 for the type of soil found in the
excavation, based on a calculation of estimated grey water discharge
pursuant to Section 1406 of this chapter. The area of the disposal/irrigation
field shall be equal to the aggregate length of the perforated pipe sections
within the valved -off area times the width of the proposed disposal/irriga-
tion field. Each proposed grey water system shall include at least one
valved -off area. Nothing contained in this section shall prohibit the installa-
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150.3
1407-1409 UNIFORM PLUMBING CODE
L tion of multiple valved -off areas provided that each area is in compliance with
t the provisions of this section. No excavation for a disposal/irrigation line
A shall extend within ten (10) feet of groundwater nor to a depth where grey
Awater may contaminate the underground water stratum, except that such
k distance may be reduced to five (5) feet above ground water that is ocean
L water as approved by the Administrative Authority and the Health Officer.
LThe applicant shall supply evidence of groundwater depth to the satisfaction
t. of the Administrative Authority.
A
L
L Section 1408 —Determination of Maximum Absorption Capacity
L (a) Wherever practicable, disposal/irrigation field sizes shall be computed
A from Table 14-2.
A (b) In order to determine the absorption quantities of questionable soils other
A than those listed in Table 14-2, the proposed site maybe subjected to
A percolation tests acceptable to the Administrative Authority and the Health
A Officer.
(c) When a percolation test is required, no grey water system shall be
LA permitted if the test shows the absorption capacity of the soil is less than 0.83
L gallons per square foot or more than 5.12 gallons per square foot of leaching
tarea per 24 hours.
A
L
L Section 1409 —Storage Tank Construction (Figs. 1,-2 and 3)
t (a) Plans for all storage tanks shall be submitted to the Administrative
A. Authority for approval. Such plans shall show all dimensions, structural
A calculation, bracings and such other pertinent data as may be required.
A(b) Storage tanks shall be constructed of solid durable materials, not subject
A to excessive corrosion or decay and shall be watertight.
L (c) Each storage tank shall be vented as required by Chapter 5 of this Code
A and shall have a bolted, gasketed access opening, or approved equivalent, to
L allow for inspection and cleaning.
A(d) Each storage tank shall have its rated capacity permanently marked on
L the unit. In addition, a sign "DANGER —GREY WATER —DO NOT DRINK"
A shall be permanently marked on the tank.
A (e) Each storage tank shall have an emergency drain, separate from that
A connecting the tank with the disposal/irrigation fields, and an overflow
A drain. The emergency and overflow drains shall have permanent connections
A to the building drain or building sewer, upstream of septic tanks, if any. The
L overflow drain shall not be equipped with a shutoff valve.
A
LA (0 The inlet, outlet, emergency drain and overflow pipe shall not be less in
L size than the connecting drain pipe. The vent size shall be determined based
L on the total grey water fixture units, as outlined in Table 4-3 of this Code.
A Unions or equally effective fittings shall be provided for piping connecting
A through the access cover to facilitate the removal of that cover.
150.4
GREY WATER SYSTEMS 1409-1411
(g) Each storage tank shall be structurally designed to withstand all
anticipated earth or other loads. All storage tank covers shall be capable of
supporting an earth load of not less than 300 pounds per square foot when the
tank is designed for underground installation.
(h) Materials:
(1) Steel Tanks: The minimum wall thickness of any steel tank shall
be No. 12 U.S. gauge and each such tank shall be protected from
corrosion, both externally and internally, by an approved coating or
by other acceptable means.
(2) Alternate Materials: Storage tanks constructed of alternate
materials may be approved by the Administrative Authority
provided they comply with approved applicable standards.
Section 1410 —Valves and Piping (Figs. 1, 2 and 3)
Grey water piping discharging into the storage tank or having a direct
connection to the sanitary drain or sewer piping shall be downstream of an
approved type waterseal trap(s). If no such trap or traps exist, an approved
vented running trap shall be installed upstream of the connection to protect
the building from any possible waste or sewer gases. All grey water piping
shall be marked or shall have a continuous tape marked with the words
"DANGER —GREY WATER —DO NOT DRINK." All valves, including the
three-way valve, shall be readily accessible and shall be approved by the
Chief Plumbing Inspector.
Section 1411—Disposal/Irrigation Fields Construction (Fig. 4)
(a) Perforated sections shall be a minimum 4 -inch diameter and shall be
constructed of perforated high density polyethylene pipe, perforated ABS
pipe, perforated PVC pipe, or other approved materials, provided that
sufficient openings are available for distribution of the grey water into the
trench area. Material, construction and perforation of the piping shall be in
compliance with the appropriate absorption fields drainage piping standards
and shall be approved by the Chief Plumbing Inspector.
(b) Before the perforated sections are laid, clean stone, gravel, slag or similar
filter material acceptable to the Administrative Authority varying in size
between 3/4 inch to 2-1 /2 inches shall be placed in the trench to the depth and
grade required by thissection. The perforated sections shall be placed on filter
material in an approved manner. The perforated section shall then be covered
with filter material to the minimum depth required by this section and this
covered with untreated building paper, straw or similar porous material to
prevent closure of voids with earth backfill. No earth backfill shall be placed
over the filter material cover until after inspections and acceptance.
(c) Disposal/irrigation fields shall be constructed as follows:
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150.5
1411-1412, 14-1
UNIFORM PLUMBING CODE
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MINIMUM
MAXIMUM
Number of drain lines per field
1
—
Length of each line downstream of valve
—
100 ft.
Bottom width of trench
18 in.
36 in.
Spacing of lines, center to center
6 ft.
—
Depth of earth cover of lines
12 in.
—
Grade of perforated lines
level
3 in./100 ft.
Fitter material under drain lines
12 in.
—
Filter material over drain lines
2 in.
—
(d) When necessary on sloping ground to prevent excessive line slope,
disposal/irrigation lines shall be stepped. The lines between each horizontal
leaching section shall be made with approved watertight joints and installed
on natural or unfilled ground.
A Section 1412 —Special Provisions
A The provisions of this chapter shall remain in effect for two (2) years from the
Adate of its adoption.
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A NOTES: When disposal/irrigation fields are installed in sloping ground,
L horizontal distance between any part of the leaching system and ground surface shall
A be fifteen (15) feet.
A1 Including porches and steps, whether covered or uncovered, breezeways, roofed
L porte cocheres, roofed patios, carports, covered walks, covered driveways and simi-
A lar structures or appurtenances.
A 2This distance may be reduced for above ground tanks when first approved by the Ad-
ministrative Authority or the Health Officer.
A 3Where special hazards are involved, the distance required shall be increased as may
L be directed by the Administrative Authority or the Health Officer.
A 4These minimum clear horizontal distances shall also apply between disposal/irrigationfield and the ocean mean higher high tide line.
L 5Plus two (2) feet, for each additional foot of depth in excess of one (1) foot below the
A bottom of the drain line.
LA 6For parallel construction —for crossings, approval by the Health Officer shall be re -
L quired.
BLE 14 -1 —LOCATION OF GREY WATER SYSTEM
MINIMUM HORIZONTAL DISTANCE IN CLEAR REQUIRED
FROM:
STOCK E -
DISPOSA IRRRIGATION
FIELD
Buildings or structures1
5 feet2
8 feet
Property line adjoining private property
5 feet
5 feet
Water supply wells3
. 50 feet
100 feet
Streams and lakes3
50 feet
50 feet4
Seepage pits or cesspools
5 feet
5 feet
Disposal field
5 feet
4 feet5
Septic tank
—
5 feet
On -site domestic water service line
5 feet
5 feet
Pressure public water main
10 feet
10 feet6
150.6
GREY WATER SYSTEMS
14.2— FIGURE 1
TABLE 14 -2 —DESIGN CRITERIA OF SIX TYPICAL SOILS
TYPE OF SOIL
MINIMUM SO. FT. OF
LEACHINGARRIGATIOII
AREA PER 100 GALS. OF
ESTIMATED GREY WATER
DISCHARGE PER DAY
MAXIMUM ABSORPTION
CAPACITY GALS. PER SO. FT.
OF LEACHINGARRIGAT1ON
AREA FOR A 24 -HR. PERIOD
1. Coarse sand or gravel
20
5
2. Fine sand
25
4
3. Sandy loam
40
2.5
4. Sandy clay
60
1.66
5. Clay with considerable
sand or gravel
90
•
1.10
6. Clay with small amount of
sand or gravel
120
0.83
VENT SMALL OE VITNI■
TEA/ ARM DISTANCE Of
norm Ty,
t` oar twat
1/4./NT
VENTED'BUNNING
' TRAP. IF atoms.
e/L�YTB a t0' AboIE GRADE
(SUPPORT REQUIRED)
SAM TEE
WYE f 1/B SIND (T P)
TO BUILDING DRAIN OR SENEB•
UPSTREAM OF SEPTIC TANK, I/ MT
6BRIEYIAMIONf1
CIO CIEMIOUT
N.C. NORMALLY CLOSED
S.O.V. SNUT•ONN VALVE
YTI VENT TIM ROOF
4
1/4•/PT
NO
3 -WAY
GUY MATU
lTE
r
INLET
VALVE
N.C.
u0
DANGER
GREY ATER
DO SOT DRINK
IGENCV
DRAIN
3' COICRL1t PAD
IN TAN[ MOVE
GROUND
LEVEL OR .SLOPED
GREY WATER SYSTEM
SINGLE TANK - GRAVITY
FIGURE 1
UNION CO EQUAL (TTP)
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IOLTED•GA3UtID A
COVES (ACCESS) L
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APPROVED BRIER wan TAKE
(TANK 1$ ALLEM) UNDERGROJND
IF APPROVED NI WU USE)
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MAO - A
E.O.V. L
(TYP) - A
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s --1► A
_ipp.. 10 IRRIGATION A
attest
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150.7
FIGURE c
Ut.,, .,,RM PLUMBING CODE
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MT SAIL RE
A YItlil TW MM
L OI$TAMCE co RININING
A TRAP
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A ASSREVIATIOMS;,
TO BUILDING GRAIN a SEIIER•
UPSTREAM Of SEPTIC TAN, I, AMT
A cro alum
A N.C. NORMALLY CLOSED
S.O.V. SAUT•af VALVE
A , VTR VENT TIM RODE
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150.8
1/4./IT
VTR a 10• ASOVE
GRADE. (SUPPORT
REQUIRED)
3.1AT
GREY tit
VALVE
VENTED RUNNING TRAP.
II REQUIRED.
GREY WATER SOUK&
(GAAVITT a PUMPED)
SAM TEE
VIE & 1/S SEND
UNION
a
EQUAL
(TT►)
INLET
EMERGENCY
DRAIN
SACEWIER VALVE
AND GATE VALVE
VITM UNIONS
uo
SOLTED •GASMEIED
COVER (ACCESS)
— APPROVED WATER
TIGNt TAN
(TAN IS ALLOWED
UNDERGROUND
11 APPROVED ION
VAN USE)
FROM TO/ TNNNSI
VIE & 1/11 SEND
.""1111T 3• CONCRETE PAD � 10 IRRIGATION
1/WIT ff11AGL lama, If TAN ADM LEVEL STSTEII
WITS PROSES GRaAO • a
SLOPED
GREY WATER SYSTEM
SINGLE TANK - PUMPED
FIGURE 2.
GREY WATER SYSTEMS
FIGURE 3
KIT SNALL RE
WlTI l TRAP ARM
DISTANCE of RVNNIK
TRAP
GRET w1ER
:MRCS
[4,114.1Ft
VTR Ca 10' Mad
GRADE. cw►rQRr
REWIRED) .
3 -NAT
GRIT PATER
v411
VENTED RUNNING TRAP,
II REQUIRED.
SAN TEE
THE S 1/0 SENO
(TIP)
1/A•/IT
uNI01
OR
MAL
(TT►)
--INLET
OV4SILa
I
No VALVE)
10 SUILDING DRAIN OR SE1ER-
TPSTREAN 0► SEPTIC TANK. If ANT
MSREVIATIONS.
C/O CLEAMa1
N.C. NCIMALIT CLOSED
1.0. NOANMLLT OPEN
S.O.V. s1AJT•011 VALVE
VTR TENT TaRu 8001
DANGER
GRIT 1MTEN
00 NOT ORINK
EJERGEMCT
ORATE
TENT
fo• ANNE TOP OF
NIGNEST TAKE
(110 VALVE)
naval
8.0.1.
(TTP)
3. CONCRETE PAD
IF TAKE MOVE
GRaNO
SOLTEO•GASQTED
COVER (ACCESS)
DROVED WTIR
00.....(1,--ap
TIGHT TAY[
(TANK IS 41.10.E0
UNDEAGROJNO
II APPROVED 101
suCN usi)
LEW'
OR
SLOPED
TO IRIICATION
ETSTQ
GREY WATER SYSTEM
. MULTIPLE TANK INSTALLATION
FIGURE 3
150.9
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FIGURE 4
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A To ►URLIC SEVER
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A A• PERFORATED
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150.10
FILTERING
MATERIAL
SECTION A -A
`LEKTR Of
PER f auTED
►If4 SECT ICI
VALVED-OfI
AREA
UNTREATED
RUILDIRG PAPER
T
1r
UNIFORM PLUMBING CODE
A• DIA (TIP)
S' MIR
CACI VALVED -Off AREA SRALL RAVE A MINIMA EFFECTIVE
ARfOR>•t1ON/IRRIGATION AREA IS SOUAU Int PREDICATED
ON TIE ESTIMATED GET MASER DISCHARGE 1R GALLONS
PER DAT AMP ON INC TIPS Of SOIL fO.O IN INC
EXCAVATION. AREA Of f1E10 LULL SE EOUAI TO INC
AGGREGATI LEKTR OF ►ERrORATED PIPE SECTIONS MITRIS
TIE VALVED -Off AREA TIMES TIE VIDTR Of INC PROPOSED
FIELD.
GREY WATER SYSTEM
TYPICAL IRRIGATION LAYOUT
FIGURE 4