Heads up:
There are no amended sections in this chapter.
| Adopting Agency | BSC | BSC-CG | SFM | HCD | DSA | OSHPD | BSCC | DPH | AGR | DWR | CEC | CA | SL | SLC | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 1-AC | AC | SS | SS/CC | 1 | 1R | 2 | 3 | 4 | 5 | ||||||||||||
| Adopt Entire Chapter | X | X | X | ||||||||||||||||||||
| Adopt Entire Chapter as amended (amended sections listed below) | X | X | X | X | X | X | X | ||||||||||||||||
| Adopt only those sections that are listed below | |||||||||||||||||||||||
| Chapter/Section | |||||||||||||||||||||||
| 1003.1 Exception 2 | X | X | |||||||||||||||||||||
| 1010.2 & Subsections | X | ||||||||||||||||||||||
| 1010.3 | X | ||||||||||||||||||||||
| 1010.4 | X | ||||||||||||||||||||||
| 1010.5 & Subsections | X | ||||||||||||||||||||||
| 1014.1A | X | X | X | X | X | X | |||||||||||||||||
| 1014.1B | X | X | X | X | X | X | |||||||||||||||||
| 1014.1C | X | X | X | X | X | X | |||||||||||||||||
| 1015.5 | X | X | X | X | X | X | |||||||||||||||||
| 1015.6 | X | X | X | X | X | X | |||||||||||||||||
The Office of the State Fire Marshal's adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.0.
This chapter shall govern the materials,
design, and installation of traps and interceptors.
Each plumbing fixture shall be
separately trapped by an approved type of liquid seal trap.
This section shall not apply to fixtures with integral traps. Not
more than one trap shall be permitted on a trap arm. Food
waste disposers installed with a set of restaurant, commercial,
or industrial sinks shall be connected to a separate trap.
Each domestic clothes washer and each laundry tub shall be
connected to a separate and independent trap, except that a
trap serving a laundry tub shall also be permitted to receive
the waste from a clothes washer set adjacent to it. The vertical
distance between a fixture outlet and the trap weir shall be
as short as practicable, but in no case shall the tail piece from
a fixture exceed 24 inches (610 mm) in length. One trap shall
be permitted to serve a set of not more than three single compartment
sinks or laundry tubs of the same depth or three
lavatories immediately adjacent to each other and in the same
room where the waste outlets are not more than 30 inches
(762 mm) apart, and the trap is centrally located where three
compartments are installed.
Each plumbing fixture trap, except as
otherwise provided in this code, shall be protected against
siphonage, backpressure, and air circulation shall be assured
throughout the drainage system using a vent pipe installed in
accordance with the requirements of this code.
Each fixture trap shall have a protecting vent so located that the developed length of the trap arm from the trap weir to the inner edge of the vent shall be within the distance given in Table 1002.2 but in no case less than two times the diameter of the trap arm.
For SI units: 1 inch = 25.4 mm
Notes:
| TRAP ARM PIPE DIAMETER (inches) | DISTANCE TRAP TO VENT MINIMUM (inches) | LENGTH MAXIMUM (inches) |
|---|---|---|
| 11/4 | 21/2 | 30 |
| 11/2 | 3 | 42 |
| 2 | 4 | 60 |
| 3 | 6 | 72 |
| 4 | 8 | 120 |
| Exceeding 4 | 2 x Diameter | 120 |
Notes:
- 1 Maintain 1/4 inch per foot slope (20.8 mm/m).
- 2 The developed length between the trap of a water closet or similar fixture (measured from the top of the closet flange to the inner edge of the vent) and its vent shall not exceed 6 feet (1829 mm).
A trap arm shall be permitted
to change direction without the use of a cleanout where
such change of direction does not exceed 90 degrees (1.57
rad). Horizontal changes in the direction of trap arms shall be in accordance with Section 706.3.
The vent pipe opening from
soil or waste pipe, except for water closets and similar fixtures, shall not be below the weir of the trap.
Each trap, except for
traps within an interceptor or similar device shall be self-cleaning.
Traps for bathtubs, showers, lavatories, sinks, laundry
tubs, floor drains, urinals, drinking fountains, dental units,
and similar fixtures shall be of standard design, weight and
shall be of ABS, cast-brass, cast-iron, lead, PP, PVC, or other
approved material. An exposed and readily accessible drawn-copper
alloy tubing trap, not less than 17 B & S Gauge (0.045
inch) (1.143 mm), shall be permitted to be used on fixtures
discharging domestic sewage.
Exception:
- Drawn-copper alloy tubing traps shall not be used for urinals. Each trap shall have the manufacturer's name stamped legibly in the metal of the trap, and each tubing trap shall have the gauge of the tubing in addition to the manufacturer's name. A trap shall have a smooth and uniform interior waterway.
- [HCD 1 & HCD 2] Non-water supplied urinals conforming to ASME A112.19.19-2016, Standard for Vitreous China Nonwater Urinals, or reference standards in Table 1701.1 for non-vitreous ceramic or plastic urinal fixtures.
No form of trap that depends for its seal
upon the action of movable parts shall be used. No trap that
has concealed interior partitions, except those of plastic, glass, or similar corrosion-resisting material, shall be used. "S" traps,
bell traps, and crown-vented traps shall be prohibited. No fixture
shall be double trapped. Drum and bottle traps shall be
installed for special conditions. No trap shall be installed without a vent, except as otherwise provided in this code.
Bladders, check valves or another
type of devices with moveable parts shall be prohibited to
serve as a trap.
Each fixture trap shall have a liquid seal of
not less than 2 inches (51 mm) and not more than 4 inches
(102 mm), except where a deeper seal is found necessary by
the Authority Having Jurisdiction. Traps shall be set true with
respect to their liquid seals and, where necessary, they shall be protected from freezing.
Floor drains shall connect into a trap so
constructed that it can be readily cleaned and of a size to serve
efficiently the purpose for which it is intended. The drain inlet
shall be so located that it is in full view. Where subject to the
reverse flow of sewage or liquid waste, such drains shall be
equipped with an approved backwater valve.
Floor drain or similar traps directly connected to the drainage system and subject to infrequent use shall be protected with a trap seal primer, except where not deemed necessary for safety or sanitation by the Authority Having Jurisdiction. Trap seal primers shall be accessible for maintenance.
Potable water supply trap seal
primer valves shall comply with ASSE 1018. Drainage and
electronic design type trap seal primer devices shall comply
with ASSE 1044.
Building traps shall not be installed except
where required by the Authority Having Jurisdiction. Each
building trap where installed shall be provided with a cleanout
and with a relieving vent or fresh-air intake on the inlet side
of the trap, which needs not be larger than one-half the diameter
of the drain to which it connects. Such relieving vent or
fresh-air intake shall be carried above grade and terminate in a screened outlet located outside the building.
Interceptors (clarifiers) (including
grease, oil, sand, solid interceptors, etc.) shall be required
by the Authority Having Jurisdiction where they are necessary
for the proper handling of liquid wastes containing
grease, flammable wastes, sand, solids, acid or alkaline substances,
or other ingredients harmful to the building drainage
system, the public or private sewer, or to public or private
sewage disposal.
The size, type, and location of each interceptor
(clarifier) or separator shall be approved by the Authority
Having Jurisdiction. Except where otherwise specifically
permitted, no wastes other than those requiring treatment or
separation shall be discharged into an interceptor (clarifier).
Interceptors (clarifiers) for sand and similar
heavy solids shall be so designed and located as to be readily accessible for cleaning and shall have a water seal of not less than 6 inches (152 mm).
Interceptors (clarifiers) shall be so
designed that they will not become air-bound where closed
covers are used. Each interceptor (clarifier) shall be properly vented.
Each interceptor (clarifier) cover shall be
readily accessible for servicing and maintaining the interceptor
(clarifier) in working and operating condition. The use of
ladders or the removal of bulky equipment to service interceptors
(clarifiers) shall constitute a violation of accessibility.
Location of interceptors (clarifiers) shall be shown on the
approved building plan.
Interceptors shall
be maintained in efficient operating condition by periodic
removal of accumulated grease, scum, oil, or other floating
substances and solids deposited in the interceptor.
The waste pipe from oil and sand interceptors
shall discharge as approved by the Authority Having
Jurisdiction.
A fish, fowl, and animal slaughterhouse or
establishment; a fish, fowl, and meat packing or curing establishment;
a soap factory, tallow-rendering, fat-rendering, and a
hide-curing establishment shall be connected to and shall drain or discharge into an approved grease interceptor (clarifier).
Drainage and plumbing systems shall meet the requirements
of Section 724.0.
The plumbing shall be installed so as to prevent
sewage from backing up and flooding the floor.
Exception: Floor drains in areas not regularly washed
down will be acceptable with deep-seal traps, provided
that such drains are connected to secondary drainage
systems discharging into a safe sink or basin (air gap)
that is properly trapped and vented, and that such drains
accomplish the objectives and intent of this section.
Interceptor traps which are connected with the
sewer system shall not be near any edible products
department or in any area where products are unloaded
from or loaded into vehicles. To facilitate cleaning, such
traps shall have inclined bottoms and be provided with
suitable covers.
There shall be an efficient drainage and plumbing system for the plant and premises.
All drains and gutters
shall be properly installed with approved traps and
vents. The drainage and plumbing system must permit
the quick runoff of all water from plant buildings, and of
surface water around the plant on the premises, and all
such water shall be disposed of in such a manner as to
prevent a nuisance or health hazard.
The sewer system
have adequate slope and capacity to remove readily
all waste from the various processing operations and to
minimize, or if possible, prevent stoppage and surcharging
of the system. When the sewage disposal system is a
private system which is required to be approved by a
state or local health authority, the applicant shall furnish
the administrator a letter from the proper health
authority indicating that the sewage disposal system is
acceptable to such authority.
A private or public wash rack or floor or
slab used for cleaning machinery or machine parts shall be
adequately protected against storm or surface water and shall
drain or discharge into an approved interceptor (clarifier).
Laundry equipment in commercial and
industrial buildings that do not have integral strainers shall
discharge into an interceptor having a wire basket or similar
device that is removable for cleaning and that will prevent
passage into the drainage system of solids 1/2 of an inch (12.7 mm) or larger in maximum dimensions, such as string, rags, buttons, or other solid materials detrimental to the public sewerage system.
Bottling plants shall discharge their process
wastes into an interceptor that will provide for the separation
of broken glass or other solids, before discharging liquid
wastes into the drainage system.
Where it is determined by the Authority
Having Jurisdiction that waste pretreatment is required, an
approved type of grease interceptor(s) complies with ASME A112.14.3, ASME A112.14.4, CSA B481, PDI G-101, or PDI
G-102, and sized in accordance with Section 1014.2.1 or Section
1014.3.6, shall be installed in accordance with the manufacturer's
installation instructions to receive the drainage
from fixtures or equipment that produce grease-laden waste
located in areas of establishments where food is prepared, or
other establishments where grease is introduced into the
drainage or sewage system in quantities that can effect line
stoppage or hinder sewage treatment or private sewage disposal
systems. A combination of hydromechanical, gravity
grease interceptors and engineered systems shall be allowed
to meet this code and other applicable requirements of the
Authority Having Jurisdiction where space or existing physical
constraints of existing buildings necessitate such installations.
A grease interceptor shall not be required for
individual dwelling units or private living quarters. Water
closets, urinals, and other plumbing fixtures conveying
human waste shall not drain into or through the grease interceptor.
[OSHPD 1, 1R, 2, 3, 4 & 5] The Authority Having Jurisdiction is the individual official, board, department or
agency authorized to administer and enforce the sewage
treatment system in the area of the location of the health facility.
[OSHPD 1, 1R, 2, 3, 4 & 5] Grease interceptors shall not be installed in food preparation area of the kitchens
[OSHPD 1, 1R, 2, 3, 4 & 5] Grease interceptors
shall be installed outside of the kitchen area in location
affording ease of maintenance and servicing.
Each fixture discharging
into a grease interceptor shall be individually trapped
and vented in an approved manner.
Grease interceptors shall be
maintained in efficient operating condition by periodic
removal of the accumulated grease and latent material.
No such collected grease shall be introduced into
drainage piping or a public or private sewer. Where the
Authority Having Jurisdiction determines that a grease
interceptor is not being properly cleaned or maintained,
the Authority Having Jurisdiction shall have the authority
to mandate the installation of additional equipment or
devices and to mandate a maintenance program.
No food waste disposer or dishwasher shall be connected
to or discharge into a grease interceptor.
Commercial food waste disposers shall be permitted to
discharge directly into the building's drainage system.
Exception: Food waste disposers shall be permitted to
discharge to grease interceptors that are designed to
receive the discharge of food waste.
Plumbing
fixtures or equipment connected to a Type A and B hydromechanical
grease interceptor shall discharge through an
approved type of vented flow control installed in a readily
accessible and visible location. Flow control devices shall be designed and installed so that the total flow through such device or devices shall at no time be greater than the rated
flow of the connected grease interceptor. No flow control
device having adjustable or removable parts shall be
approved. The vented flow control device shall be located
such that no system vent shall be between the flow control
and the grease interceptor inlet. The vent or air inlet of the
flow control device shall connect with the sanitary drainage
vent system, as elsewhere required by this code, or shall terminate
through the roof of the building, and shall not terminate
to the free atmosphere inside the building.
Exception: Listed grease interceptors with integral flow controls
or restricting devices shall be installed in an accessible
location in accordance with the manufacturer's installation
instructions.
The total capacity in gallons (gal)
(L) of fixtures discharging into a hydromechanical grease
interceptor shall not exceed two and one-half times the
certified gallon per minute (gpm) (L/s) flow rate of the
interceptor in accordance with Table 1014.2.1.
For SI units: 1 inch = 25 mm, 1 gallon per minute = 0.06 L/s
Notes:
Step 1: Determine the flow rate from each fixture.
[Length] X [Width] X [Depth] / [231] = Gallons X [.75 fill factor] / [Drain Period (1 minute or 2 minutes)]
Step 2: Calculate the total load from fixtures that discharge into the interceptor.
For SI units: 1 inch = 25.4 mm, 1 gallon per minute = 0.06 L/s, 1 gallon = 3.785 L
For this section, the term "fixture" shall mean and
include each plumbing fixture, appliance, apparatus, or
other equipment required to be connected to or discharged
into a grease interceptor by a provision of this section.
| DIAMETER OF GREASE WASTE PIPE (inches) | MAXIMUM FULL PIPE FLOW (gpm)2 | SIZE OF GREASE INTERCEPTOR | |
|---|---|---|---|
| ONE-MINUTE DRAINAGE PERIOD (gpm) | TWO-MINUTE DRAINAGE PERIOD (gpm) | ||
| 2 | 20 | 20 | 10 |
| 3 | 60 | 75 | 35 |
| 4 | 125 | 150 | 75 |
| 5 | 230 | 250 | 125 |
| 6 | 375 | 400 | 200 |
Notes:
- 1 For interceptor sizing by the fixture capacity see the example below.
- 2 1/4 inch slope per foot (20.8 mm/m) based on Manning's formula with friction factor N =.012.
EXAMPLE 1014.2.1
SIZING HYDROMECHANICAL GREASE INTERCEPTOR(S) USING FIXTURE CAPACITY
SIZING HYDROMECHANICAL GREASE INTERCEPTOR(S) USING FIXTURE CAPACITY
Step 1: Determine the flow rate from each fixture.
[Length] X [Width] X [Depth] / [231] = Gallons X [.75 fill factor] / [Drain Period (1 minute or 2 minutes)]
Step 2: Calculate the total load from fixtures that discharge into the interceptor.
| FIXTURES | COMPART-MENTS | LOAD (gallons) | SIZE OF GREASE INTERCEPTOR ONE-MINUTE DRAINAGE PERIOD (gpm) | TWO-MINUTE DRAINAGE PERIOD (gpm) |
|---|---|---|---|---|
| Compartment size | - | - | - | - |
| 24 inches x 24 inches x 12 inches | 2 | 44.9 | - | - |
| Hydrant | - | 3 | - | - |
| Rated Appliance | - | 2 | - | - |
| - | - | 49.9 | 50 | 25 |
A vent shall be installed downstream of
hydromechanical grease interceptors in accordance with
the requirements of this code.
Required gravity
grease interceptors shall comply with the provisions of Section 1014.3.1 through Section 1014.3.7.
The provisions of this section shall
apply to the design, construction, installation, and testing
of commercial kitchen gravity grease interceptors.
Waste
discharge in establishments from fixtures and equipment
which contain grease, including but not limited to,
scullery sinks, pot and pan sinks, dishwashers, soup kettles,
and floor drains located in areas where grease-containing
materials exist, shall be permitted to be drained
into the sanitary waste through the interceptor where
approved by the Authority Having Jurisdiction.
Gravity interceptors shall be constructed
in accordance with the applicable standard in
Table 1701.1 or the design approved by the Authority
Having Jurisdiction.
Each grease interceptor shall be so
installed and connected that it shall be easily accessible
for inspection, cleaning, and removal of the intercepted
grease. A gravity grease interceptor that complies with
IAPMO Z1001 shall not be installed in a building where
food is handled. Location of the grease interceptor shall
meet the approval of the Authority Having Jurisdiction.
Interceptors shall be
placed as close as practical to the fixtures they serve.
Each
business establishment for which a gravity grease
interceptor is required shall have an interceptor
which shall serve that establishment unless otherwise
approved by the Authority Having Jurisdiction.
Each gravity grease interceptor
shall be located to be readily accessible to the
equipment required for maintenance.
Gravity
grease interceptors shall be designed to remove grease
from effluent and shall be sized in accordance with this
section. Gravity grease interceptors shall also be
designed to retain grease until accumulations can be
removed by pumping the interceptor. It is recommended
that a sample box is located at the outlet end of gravity
grease interceptors so that the Authority Having Jurisdiction
can periodically sample effluent quality.
The volume of the interceptor
shall be determined by using Table 1014.3.6. Where
drainage fixture units (DFUs) are not known, the interceptor
shall be sized based on the maximum DFUs
allowed for the pipe size connected to the inlet of the
interceptor. Refer to Table 703.2, Drainage Piping, Horizontal.
For SI units: 1 gallon = 3.785 L
Notes:
Given: A restaurant with the following fixtures and equipment.
One food preparation sink; three-floor drains - one in the food prep area, one in the grill area, and one receiving the indirect waste from the ice machine and a mop sink.
Using Table 1014.3.6, the grease interceptor will be sized at 750 gallons (2389 L).
| DRAINAGE FIXTURE UNITS1,3 (DFUs) | INTERCEPTOR VOLUME2 (gallons) |
|---|---|
| 8 | 500 |
| 21 | 750 |
| 35 | 1000 |
| 90 | 1250 |
| 172 | 1500 |
| 216 | 2000 |
| 307 | 2500 |
| 342 | 3000 |
| 428 | 4000 |
| 576 | 5000 |
| 720 | 7500 |
| 2112 | 10000 |
| 2640 | 15000 |
Notes:
- 1 The maximum allowable DFUs plumbed to the kitchen drain lines that will be connected to the grease interceptor.
- 2 This size is based on DFUs, the pipe size from this code; Table 703.2; Useful Tables for flow in half-full pipes (ref: Mohinder Nayyar Piping Handbook, 3rd Edition, 1992). Based on 30-minute retention time (ref.: George Tchobanoglous and Metcalf & Eddy. Wastewater Engineering Treatment, Disposal, and Reuse, 3rd Ed. 1991 & Ronald Crites and George Tchobanoglous. Small and Decentralized Wastewater Management Systems, 1998). Rounded up to nominal interceptor volume.
- 3 Where the flow rate of directly connected fixture(s) or appliance(s) have no assigned DFU values, the additional grease interceptor volume shall be based on the known flow rate (gpm) (L/s) multiplied by 30 minutes.
EXAMPLE 1014.3.6
GRAVITY GREASE INTERCEPTOR SIZING EXAMPLE
GRAVITY GREASE INTERCEPTOR SIZING EXAMPLE
Given: A restaurant with the following fixtures and equipment.
One food preparation sink; three-floor drains - one in the food prep area, one in the grill area, and one receiving the indirect waste from the ice machine and a mop sink.
| Kitchen Drain Line DFU Count (from Table 702.1): | ||
|---|---|---|
| 3 floor drains at 2 DFUs each | = | 6 DFUs |
| Mop sink at 3 DFUs each | = | 3 DFUs |
| Food prep sink at 3 DFUs each | = | 3 DFUs |
| Total | = | 12 DFUs |
Using Table 1014.3.6, the grease interceptor will be sized at 750 gallons (2389 L).
Abandoned grease interceptors shall be pumped
and filled as required for abandoned sewers and sewage
disposal facilities in Section 722.0.
The purpose of this section is to provide
the necessary criteria for the sizing, application, and installation
of FOG disposal systems designated as a pretreatment or
discharge water quality compliance strategy.
FOG
disposal systems, including components, materials, and
equipment necessary for the proper function of the system,
shall comply with ASME A112.14.6.
FOG disposal systems
shall be sized and installed in accordance with the manufacturer's installation instructions.
FOG disposal systems shall produce
an effluent quality not to exceed 5.84 grains per gallon
(gr/gal) (100 mg/L) FOG.
[OSHPD 1, 1R, 2, 3, 4 & 5] Grease interceptors shall not be installed in food preparation area of kitchens.
[OSHPD 1, 1R, 2, 3, 4 & 5] Grease interceptors
shall be installed outside of the kitchen area in location
affording ease of maintenance and servicing.
Where the discharge of a fixture or drain
contains solids or semi-solids heavier than water that would
be harmful to a drainage system or cause a stoppage within
the system, the discharge shall be through a sand interceptor.
Multiple floor drains shall be permitted to discharge into one sand interceptor.
Sand interceptors
are required where the Authority Having Jurisdiction deems
it advisable to have a sand interceptor to protect the drainage system.
Sand interceptors shall be
built of brick or concrete, prefabricated coated steel, or other
watertight material. The interceptor shall have an interior baffle
for full separation of the interceptor into two sections. The
outlet pipe shall be the same size as the inlet pipe of the sand
interceptor, the minimum being 3 inches (80 mm), and the
baffle shall have two openings of the same diameter as the
outlet pipe and at the same invert as the outlet pipe. These
openings shall be staggered so that there cannot be a straight
line flow between the inlet pipe and the outlet pipe. The invert
of the inlet pipe shall be no lower than the invert of the outlet pipe.
The sand interceptor shall have a minimum dimension of 2 square feet (0.2 m2) for the net free opening of the inlet section and a minimum depth under the invert of the outlet pipe of 2 feet (610 mm).
For each 5 gpm (0.3 L/s) flow or fraction thereof over 20 gpm (1.26 L/s), the area of the sand interceptor inlet section is to be increased by 1 square foot (0.09 m2). The outlet section shall at all times have a minimum area of 50 percent of the inlet section.
The outlet section shall be covered by a solid removable cover, set flush with the finished floor, and the inlet section shall have an open grating, set flush with the finished floor and suitable for the traffic in the area in which it is located.
The sand interceptor shall have a minimum dimension of 2 square feet (0.2 m2) for the net free opening of the inlet section and a minimum depth under the invert of the outlet pipe of 2 feet (610 mm).
For each 5 gpm (0.3 L/s) flow or fraction thereof over 20 gpm (1.26 L/s), the area of the sand interceptor inlet section is to be increased by 1 square foot (0.09 m2). The outlet section shall at all times have a minimum area of 50 percent of the inlet section.
The outlet section shall be covered by a solid removable cover, set flush with the finished floor, and the inlet section shall have an open grating, set flush with the finished floor and suitable for the traffic in the area in which it is located.
Sand and similar interceptors for
every solid shall be so designed and located as to be readily
accessible for cleaning, shall have a water seal of not less than 6 inches (152 mm), and shall be vented.
Repair garages and gasoline
stations with grease racks or grease pits, and factories
that have oily, flammable, or both types of wastes as a result
of manufacturing, storage, maintenance, repair, or testing
processes, shall be provided with an oil or flammable liquid
interceptor that shall be connected to necessary floor drains.
The separation or vapor compartment shall be independently
vented to the outer air. Where two or more separation or vapor
compartments are used, each shall be vented to the outer air
or shall be permitted to connect to a header that is installed at
a minimum of 6 inches (152 mm) above the spill line of the
lowest floor drain and vented independently to the outer air.
The minimum size of a flammable vapor vent shall be not
less than 2 inches (50 mm), and, where vented through a sidewall,
the vent shall be not less than 10 feet (3048 mm) above
the adjacent level at an approved location. The interceptor
shall be vented on the sewer side and shall not connect to a
flammable vapor vent. Oil and flammable interceptors shall
be provided with gastight cleanout covers that shall be readily
accessible. The waste line shall be not less than 3 inches
(80 mm) in diameter with a full-size cleanout to grade. Where
an interceptor is provided with an overflow, it shall be provided with an overflow line [not less than 2 inches (50 mm)
in diameter] to an approved waste oil tank having a minimum
capacity of 550 gallons (2082 L) and meeting the requirements
of the Authority Having Jurisdiction. The waste oil
from the separator shall flow by gravity or shall be pumped
to a higher elevation by an automatic pump. Pumps shall be
adequately sized and accessible. Waste oil tanks shall have a
2 inch (50 mm) minimum pump-out connection at grade and
an 11/2 inch (40 mm) minimum vent to atmosphere at an
approved location not less than 10 feet (3048 mm) above
grade.
Each manufactured interceptor
that is rated shall be stamped or labeled by the manufacturer
with an indication of its full discharge rate in gpm
(L/s). The full discharge rate to such an interceptor shall be
determined at full flow. Each interceptor shall be rated equal
to or greater than the incoming flow and shall be provided
with an overflow line to an underground tank.
Interceptors not rated by the manufacturer shall have a depth of not less than 2 feet (610 mm) below the invert of the discharge drain. The outlet opening shall have not less than an 18 inch (457 mm) water seal and shall have a minimum capacity as follows: Where not more than three motor vehicles are serviced, stored, or both, interceptors shall have a minimum capacity of 6 cubic feet (0.2 m3), and 1 cubic foot (0.03 m3) of capacity shall be added for each vehicle up to 10 vehicles. Above 10 vehicles, the Authority Having Jurisdiction shall determine the size of the interceptor required. Where vehicles are serviced and not stored, interceptor capacity shall be based on a net capacity of 1 cubic foot (0.03 m3) for each 100 square feet (9.29 m2) of the surface to be drained into the interceptor, with a minimum of 6 cubic feet (0.2 m3).
Interceptors not rated by the manufacturer shall have a depth of not less than 2 feet (610 mm) below the invert of the discharge drain. The outlet opening shall have not less than an 18 inch (457 mm) water seal and shall have a minimum capacity as follows: Where not more than three motor vehicles are serviced, stored, or both, interceptors shall have a minimum capacity of 6 cubic feet (0.2 m3), and 1 cubic foot (0.03 m3) of capacity shall be added for each vehicle up to 10 vehicles. Above 10 vehicles, the Authority Having Jurisdiction shall determine the size of the interceptor required. Where vehicles are serviced and not stored, interceptor capacity shall be based on a net capacity of 1 cubic foot (0.03 m3) for each 100 square feet (9.29 m2) of the surface to be drained into the interceptor, with a minimum of 6 cubic feet (0.2 m3).
