HomeMy WebLinkAboutEDB FOG BMP Policy Updates EXECUTIVE SUMMARY
AGENDA ITEM:
Proposed update to the FOG BMP Policy to include hydromechanical grease interceptor device
maintenance requirements.
Date: September 15, 2022
BACKGROUND:
The current FOG BMP Policy includes required maintenance practices for gravity grease interceptors.
Gravity grease interceptors are often concrete vaults or tanks with inlet and outlet ports and a baffle wall
that use gravity and time to separate grease from food service industry effluent prior to discharge to
CCUA's collection system. Hydromechanical grease interceptors differ from gravity grease interceptors
in that hydromechanical devices contain engineered components such as air intakes, flow control plates,
and inlet baffles to create a more active and efficient grease separation process. The increase in efficiency
can result in a reduction in the frequency of pump outs needed, saving the food service establishment
03
money in hauling costs. Also, hydromechanical interceptors are often less expensive to install because
CD they take up a smaller footprint than the gravity grease interceptors.
0
c The updated FOG BMP Policy, highlighted in yellow, provides hydromechanical grease interceptor
w device maintenance requirements to capture the potential difference in pumping frequency from the
ce gravity grease interceptors, and to communicate to our customer's that CCUA approves of the use of
hydromechanical interceptor devices in our collection system.
REQUEST:
Staff respectfully requests the Board of Supervisors approval of the FOG BMP Policy hydromechanical
grease interceptor device maintenance updates.
ATTACHMENTS:
FOG BMP Policy
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Fats, Oils, and Grease Best Management Practice Policy for Commercial Users.
Rev. Date: 8/12/2022
Page 1of8
Contents
Introduction 3
Commercial users of concern 3
Policy 4
Discharge policy 4
Required Maintenance Practices 5
Gravity Grease Interceptors Maintenance 5
Hydromechanical Grease Interceptors Maintenance 6
Sand, hair, and lint traps/screens 6
Kitchen Practices 6
Documentation 7
Approved Haulers 7
Conclusion 8
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Introduction
In accordance with Clay County Utility Authority (CCUA) Resolution NO. 2021/2022-05; comes the
development of the Clay County Utility Authority Fats Oils and Grease Best Management Practices (FOG
BMP) policy which is designed to reduce the amount of FOG discharged to the CCUA Publicly Owned
Treatment Works(POTW).
BMPs are routine procedures or practices for business owners and employees to manage food waste
and Fats, Oils and Grease (FOG) in an efficient manner. Establishments that implement BMPs may
realize financial benefit through a reduction in the frequency of required grease interceptor and grease
trap cleaning and maintenance. BMPs are designed to help facilities prevent pollution and comply with
environmental regulations.
As part of the Clean Water Act, the National Pretreatment Regulation (40CFR 403) was established to
protect POTWs and the waterways to which they discharge.The Florida Department of Environmental
Protection (FDEP) has delegated this responsibility to CCUA. It is the responsibility of the CCUA Industrial
Pretreatment(IP) program to regulate non-residential discharges to the POTW.
Through this policy,food service establishments (FSEs) and designated commercial users are required to
follow the guidelines and operating procedures set forth in this document. If it is found that a user is not
utilizing BMPs, CCUA may apply remedies as necessary to help protect the CCUA sanitary sewer system,
to the environment and public health.
CCUA is providing an online program to help all users in all things related to FOG. app.fogbmp.com will
allow the user to create best management practices that are customized to their individual needs. Any
facility designated as a user by CCUA Pretreatment program, is required to set up a profile and
implement the BMPs to protect the sewer collection system,wastewater treatment facilities, receiving
waters and ground water discharges.
Commercial users of concern
Commercial facilities that prepare and/or serve food or beverages for sale or consumption.These
include, but are not limited to restaurants, delis, bakeries, ice cream parlors, and cafés.
Automotive/Mechanical repair and maintenance facilities. Oils, cleaners, and other products used in this
industry can have a harmful impact on the process of POTWs.
Animal groomers, Barbers/Salons, Laundry facilities. Hair, sand, and lint are another important factor in
the FOG policy. Hair and lint can cause blockages in various parts of the collection system resulting in
costly repairs. Sand and debris can cause pipes and equipment to deteriorate quickly leading to high-
cost plumbing repairs.
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Any other commercial user who is deemed a concern or may discharge products of concern into the
POTWs collection system.
Policy
Nonresidential users that prepare, process, or serve food or food products and discharge to the POTW's
sewer system shall have an approved grease interceptor/trap.These include but are not limited to
hotels, hospitals, restaurants, shopping malls/centers, nursing homes, schools,grocery stores, bars, ice
cream parlors, and any facility found to produce FOG.
Nonresidential establishments that have the potential to discharge wastes containing petroleum-based
oil and grease, including but not limited to car washes, dealerships, and automotive/mechanical related
facilities, shall have an approved oil/water separator. Oil/water separators shall be sized on an individual
case-by-case basis using established design guidelines for each facility.
If CCUA finds multifamily dwellings to be contributing FOG in quantities sufficient to cause line
stoppages or malfunctions within the collection system, CCUA shall direct an authorized representative
of the user to cease discharging oil and grease to the POTW and/or shall be required to install a grease
trap/interceptor.The capacity of the trap/interceptor shall be determined on a case-by-case basis.
Owner shall install a control manhole or sample port for monitoring purposes, as approved by CCUA.
Discharge policy
to CCUA, as the control authority, is required to regulate discharges from FSEs and other deemed users.
The CCUA Pretreatment program policy requires such establishments/users discharging to the sanitary
sewer system to implement the BMPs in this manual to reduce the amount of FOG entering the POTW.
Discharge standards are as follows:
• All users unless otherwise determined by CCUA, must have a properly sized and operating
gravity or hydromechanical grease separation device (GSD).
• All discharges must be in accordance with applicable state, local or federal rules and regulations.
• Sizing and design of all GSDs must meet the criteria set forth in this BMP policy, as well as the
current Florida Building Code -Plumbing, Chapter 10.
• Sizing and design must be approved by CCUA, county code and permitting.
• All drains bearing FOG must be plumbed to the GSD/Interceptor.
• All GSDs, oil interceptors, and/or hair, sand, and lint traps must be maintained on a basis
determined by CCUA's current Pretreatment program.
• Under sink grease traps will only be approved on a case-to-case basis and are not to be used
when a larger GSD/interceptor is needed.
• An outdoor in-ground grease trap/interceptor of proper size shall be required if any under sink
trap is found to be in violation of this policy more than three (3)times in a twelve (12) month
period.
• Grease traps/interceptors and oil/water separators shall achieve an effluent oil and grease
concentration of less than 100 mg/I (milligrams per liter).
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Required Maintenance Practices
• To help prevent FOG from being introduced to the CCUA POTW system, GSDs must be inspected
and maintained on a regular basis.
• GSDs must be inspected during each pump out event to ensure proper functionality.
• CCUA will conduct solids and grease percentage volume tests at random to ensure proper
scheduling of pump outs is performed.
• All gravity grease interceptors will follow a 25% rule for maintenance frequency.The total depth
of the floating grease layer plus the settleable solids layer cannot exceed 25% of the total liquid
depth of the trap/interceptor.
• All hydromechanical grease interceptors will follow a 60% rule for maintenance frequency.The
total depth of the floating grease layer plus the settleable solids layer cannot exceed 60%of the
total liquid depth of the trap/interceptor.
Gravity Grease Interceptors Maintenance
GGI size Frequency Procedure
It is required that self-cleaning
0-49 gallons A frequency not to exceed with documentation is
to 15 days. * submitted through FOG BMP
portal. Professional services
are recommended. _
A frequency not to exceed It is required that a
50 gallons to 749 gallons 45 days or more often if professional service be used
grease and solids levels to ensure proper disposal and
reach 25%of tank volume. * maintenance.
A frequency not to exceed It is required that a
750 gallons or greater 90 days or more often if professional service be used
grease and solids levels to ensure proper disposal and
reach 25%of tank volume. * maintenance.
*A pumping frequency variance can be requested.Approval will be based on past cleaning
records and Interceptor/trap percentage levels from past inspections. All pumping frequency
variance requests shall be submitted to the pretreatment coordinator.
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Hydromechanical Grease Interceptors Maintenance
HGI size Frequency Procedure
It is required that self-cleaning
0-49 gallons A frequency not to exceed 15 with documentation is
days. * submitted through FOG BMP
portal. Professional services are
recommended.
A frequency not to exceed 45 It is required that a professional
50 gallons to 749 gallons days or more often if grease and service be used to ensure
solids levels reach 60%of tank proper disposal and
volume. * maintenance.
A frequency not to exceed 90 It is required that a professional
750 gallons or greater days or more often if grease and service be used to ensure
solids levels reach 60%of tank proper disposal and
volume. * maintenance.
*A pumping frequency variance can be requested. Approval will be based on past cleaning
to records and Interceptor/trap percentage levels from past inspections. All pumping frequency
variance requests shall be submitted to the pretreatment coordinator.
Sand, hair, and lint traps/screens
• All Laundromats and drycleaners are required to have lint traps/screens.
• All sand and hair screening devices will be required and monitored on a case-by-case basis
depending on amount of debris/grit generated by the business.
• All screens must be stainless steel.
Kitchen Practices
Owners should train kitchen staff and other employees about the harm of fats, oils, and grease being
discharged into the sewer system. CCUA recommends all employees complete the FOG BMP training
and competency review.Training tools are accessible from the facility Dashboard via app.fogbmp.com.
Additional BMPs in the kitchen are as follows:
• Post"No Grease" signs above sinks and dishwashing areas.
• Install drain screens at all drain locations.
• Test and determine when to change the oil in fryers.Test kits are recommended.
• Regularly skim and filter fryer oil.
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• Ensure outdoor grease and oil storage is covered from rain overflow and is stored away from
storm drains.
• Complete daily inspections of all grease storage containers.
• Empty recycled grease storage containers before reaching 85%capacity to avoid accidental
overflows.
• Do not use emulsifiers, grease cutters or other chemicals or detergents for FOG control in the
facility.
• Do not use grinders or garbage disposals. Food particles take up volume in the interceptor,
which results in an increased pump out frequency.
• Scrape or wipe excessive food waste from dishes, pots, and pans into waste containers.
• Wipe out pots, pans, bowls, and other dishware with paper towels ("dry" cleaning)
prior to "wet" cleaning.
• Use water less than 140°F in all sinks, most importantly, the pre-rinse sink before the
dishwasher.
• Use absorbent pads/products to clean up spilled oil and grease. Immediately discard
pads/product in the trash to prevent introduction to any drains.
• Do not use rags/towels to clean up oil and grease.These items tend to be washed and rinsed,
which introduces concentrated amounts of oil and grease into the system.
• Routinely clean and maintain kitchen exhaust systems to prevent excess build up.
• Fryer oil (yellow grease) must not be disposed of through the sanitary sewer.Yellow grease has
re-use value and should be placed in a secured tank referred to as a used cooking oil (UCO)
bin/container. Contracting with a rendering service to haul the grease offsite for beneficial re-
use could be an option.
to All equipment wash-down areas must be in areas that allow the wash water to enter drains connected
to the grease separation device. When any drain cleaning activities are performed, including but not
limited to jetting and rodding, FOG will not be permitted to pass through any drainage system. All FOG
shall be collected and transported by an approved hauler and disposed of at an approved disposal
facility.
Documentation
CCUA Industrial Pretreatment requires all records of trap/interceptor maintenance or pump outs be
maintained on site and available for CCUA inspection for a minimum of three (3)years.
Owner should ensure hauler leaves a copy of each pump out report and any other interceptor
maintenance records.
Approved Haulers
CCUA requires each FOG BMP user select a hauler/pump out company from the list of approved haulers
located in the FOG BMP portal (app.fogbmp.com). Approved haulers will ensure that traps/interceptors
are serviced at the proper frequency and all required paperwork is completed properly and submitted to
CCUA in a timely manner. CCUA's approved haulers are required to perform these duties for their
customers.
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Conclusion
Commercial establishments can have a significant impact on the environment. Using a properly sized and
functioning interceptor, FOG BMPs, and regular maintenance of interceptors/traps, Users can greatly
reduce the amount of fats, oils, and grease discharged to the sanitary sewer system.
By following the recommendations included herein, establishments will help reduce sanitary sewer
overflows and protect our community's health and environment,as well as reduce plumbing maintenance
costs associated with fats, oils, grease, hair, and other harmful debris.
Questions can be directed to
Clay County Utility Authority
3176 Old Jennings Road
Middleburg, Florida 32068
Nicholas Smith
Pretreatment Coordinator
(904) 213-2478 (904 )463-3126
Nsmith@clavutility.org
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