[Adopted 10-8-2012 by Ord. No. 2012-111]
The purpose of this article is to control discharges into the
public sewage collection system and wastewater treatment facility
that interfere with the operations of the system, cause blockage and
plugging of pipelines and heat exchangers, interfere with normal operation
of pumps and their controls, and contribute waste of a strength or
form that either causes a violation of the Sherwood Utility WPDES
permit or is beyond the treatment capability of the wastewater treatment
plant.
As used in this article, the following terms shall have the
meanings indicated:
Standard operating procedure of vehicle service facilities
that reduces or eliminates the discharge of oils, grease and gritty
material into the sanitary sewer system.
Material composed primarily of oil and grease from animal,
vegetable or petroleum sources used for lubrication of cars, trucks,
construction equipment and other mechanical equipment. The terms "oil"
and "grease" shall be referred to as "grease" by definition.
Sand, gravel, road pavement and other solid particulate material
that can accumulate on equipment in its normal use.
A device designed for separating and retaining waterborne
greases, grease complexes and gritty material prior to the wastewater
exiting the interceptor and entering the sanitary sewer collection
system and treatment system. These devices also serve to collect settleable
solids, generated by and from vehicle service activities, prior to
the water exiting the interceptor and entering the sanitary sewer
collection and treatment system.
Any person or establishment who or which contributes, causes,
or permits the contribution of discharge of wastewater into the Sherwood
Utility wastewater collection and treatment system.
Those establishments primarily engaged in servicing, maintaining,
storing, washing and any other activity that could result in the discharge
of oils, greases or gritty material into the wastewater collection
system. These facilities include but are not limited to garages, vehicle
service centers, fire stations, car washes, municipal garages and
any other sewer users as determined by the Sherwood Utility which
discharge applicable waste.
A.
Any new construction, renovation, or expansion of vehicle service
facilities shall be required to apply for a general permit and submit
to the Sherwood Utility a control plan that will effectively control
the discharge of undesirable materials into the wastewater collection
system. The plan shall be approved by the Sherwood Utility.
B.
Any existing vehicle service facility shall also be required to apply
for a general permit and submit a waste control plan that will effectively
control the discharge of undesirable materials into the wastewater
collection system. This plan will include, but not be limited to,
best management practices (BMPs) and sand interceptors and shall be
approved by the Sherwood Utility. Existing facilities shall not be
exempt from this requirement. No vehicle service facility will be
grandfathered.
C.
Any new owner of an existing vehicle service facility must submit
a general permit application and a new waste control plan to the Sherwood
Utility.
D.
Any existing vehicle service facility terminating operations must
notify the Sherwood Utility of the exact date and time operations
will terminate.
A.
Installation requirements. All existing, proposed, or newly remodeled
vehicle service facilities inside the Sherwood Utility sewer service
area shall be required to install, at their expense, an approved,
properly operated and maintained sand interceptor or follow an approved
BMP plan. Existing facilities shall not be exempt from this requirement.
No vehicle service facility will be grandfathered.
B.
Sanitary sewer flows. Sanitary sewer flows from toilets, urinals,
lavatories, etc., shall not be discharged into the grease/sand interceptor.
These flows shall be conveyed separately to the sanitary sewer service
lateral.[1]
D.
Location. Any new construction after the date of adoption of this
article shall have grease/sand interceptors installed outside the
building upstream from the sanitary sewer service lateral connection.
This will allow easy access for inspection, cleaning, and removal
of the intercepted grease and gritty material at any time. A grease/sand
interceptor may not be installed inside any part of a building without
written approval by the Sherwood Utility. If existing facilities have
approved interior interceptors, they shall be operated by an approved
BMP plan.[3]
E.
Discharge limits. No user shall allow wastewater discharge to exceed
a daily maximum of 100 milligrams per liter of grease.
A.
Construction. Sand interceptors shall be constructed and sized in
accordance with State of Wisconsin Department of Safety and Professional
Services standards, § SPS 382.34, Wis. Adm. Code.[1]
B.
Access. Access to sand interceptors shall be available at all times
to allow for proper maintenance and inspection.
A.
Cleaning/pumping. The vehicle service facility, at its expense, shall
maintain all grease traps and interceptors to assure proper operation
and efficiency and meet discharge limits. Maintenance of sand interceptors
shall include the complete removal of floating and settled solids
and inspecting and/or repairing any portion of the interceptor that
is not functioning properly. Grease hauling shall be performed by
a qualified licensed hauler. Users must be able to provide with documentation
the date; condition of interceptor after pumping, including repairs
needed; name, license number and phone number of hauler; how much
was pumped; where waste was disposed; phone number of waste disposal
site; and a copy of the original manifest from the waste hauler. Documentation
must be in a readily accessible location for Sherwood Utility personnel
to inspect. Documentation must be retained for a period of no less
than three years.
B.
Cleaning/pumping frequency. Sand interceptors must be pumped out
according to the control plan. However, given that vehicle service
methods vary greatly, some interceptors may need to be pumped on a
more frequent basis, and that frequency shall be documented in a BMP
plan approved by the Sherwood Utility.
C.
Submittal of records.
(1)
Each vehicle service facility shall submit all cleaning and maintenance
records to the Sherwood Utility. The maintenance records shall include
the following information:
(a)
Facility name, address, contact person, and phone number.
(b)
Company name, address, phone number, and contact name of person
responsible for performing the maintenance, cleaning, pumping, or
repair of grease trap.
(c)
Types of maintenance performed.
(d)
Dates maintenance was performed.
(e)
Copies of hauler manifest.
(2)
The vehicle service facility will be required to submit maintenance
records to the Sherwood Utility. Records shall be submitted according
to the control plan.
D.
Inspections. Sherwood Utility personnel will perform periodic inspections
of vehicle service facilities and will notify the facility of additional
required maintenance or repairs. Upon written notification by the
Sherwood Utility, the facility shall be required to perform the maintenance
and submit a remediation report to the Sherwood Utility within 21
calendar days. Upon inspection by the Sherwood Utility, the facility
may be required to install, at its expense, additional controls to
provide a complete system that prevents discharges of undesirable
materials into the wastewater collection system.
Chemical and biological treatments such as drain cleaners, enzymes,
bacteria, acid, or any other chemical or biological additives to emulsify
or remove grease are strictly prohibited.
A.
Any existing or new vehicle service facility not submitting a grease and gritty material control plan within the time frame determined by the Sherwood Utility shall be punishable as prescribed in Chapter 40, Fees and Penalties, of this Code.
B.
Any vehicle service facility which has not submitted maintenance records according to the control plan shall be punishable as prescribed in Chapter 40, Fees and Penalties, of this Code.
C.
Any vehicle service facility which, after inspection by the Sherwood Utility, has not made the necessary repairs or remediation and submitted a remediation report as ordered by the Sherwood Utility within 21 calendar days shall be punishable as prescribed in Chapter 40, Fees and Penalties, of this Code.
D.
Any vehicle service facility found using chemical and/or biological additives to emulsify or remove grease shall be punishable as prescribed in Chapter 40, Fees and Penalties, of this Code.
The Sherwood Utility may approve waiver of the permit requirement
for those vehicle service facilities that, after inspection by Sherwood
Utility personnel, pose no threat of discharging quantities of grease
and gritty materials into the public sewerage system that would interfere
with the efficient operation of the wastewater treatment facility.
