the interceptor, the control of which are either automatic or manually initiated.
2. Grease Trap: A device designed to retain grease from one to a maximum of four fixtures.
3. Trapzilla or Approved Equal: A polyethylene large capacity hydromechanical grease interceptor.
B. Gravity Grease Interceptor: A plumbing appurtenance or appliance that is installed in a sanitary drainage system to intercept FOG from a wastewater discharge and is identified by volume, retention time, baffles, a minimum of two compartments, a minimum total volume of 300 gallons, and gravity separation. Gravity grease interceptors are generally installed outside.
Food Service Establishment (FSE): Those establishments primarily engaged in activities of preparing, serving, or otherwise making food available for consumption by the public. FSEs include but are not limited to restaurants, commercial kitchens, caterers, hotels, schools, hospitals, prisons, correctional facilities, and care institutions.
Best Management Practice (BMP): Schedules of activities, prohibitions of practices, maintenance procedures, and other management practices to reduce the FOG discharges.
FOG Requirements:
A. All FSEs where food is being prepared or kitchenware is being washed shall install an appropriately sized grease interceptor. Espresso bars, juice bars, and other low impact FSEs may be excluded on a case by case basis.
B. Existing FSEs with planned plumbing improvements or tenant improvement plans subject to a building permit shall be evaluated during the building permit process and shall install an appropriately sized grease interceptor if one is not already in place. If a grease interceptor is required, these facilities shall first obtain approval of device type and size from the City Engineer for proper device type and size prior to receiving a building/plumbing permit.
Newly constructed FSEs shall install an appropriately sized gravity grease interceptor in conformance with CPC Chapter 10. All such facilities shall obtain prior approval from the City Engineer for sizing prior to receiving a building permit.
DRAFT
C. All existing food service establishments that are determined by the City Engineer, to have a reasonable potential to adversely impact the City’s sanitary sewer system will be required to install an appropriately sized grease interceptor or upgrade their current system to conform to the requirements of this policy. Facilities with undersized or nonfunctional grease interceptors as determined by the city will be required to install an appropriately sized grease interceptor or upgrade their current system to conform to the requirements of this policy. FSEs will be notified of their obligation to fulfill applicable requirements within a time period specified in a Notice of Correction.
Plan Review:
All building plans for the new construction of FSEs, as well as alterations of an existing FSE that require a building permit shall be approved by the City Engineer prior to issuance of the building permit.
Alternative Pretreatment Technology:
A. Devices required under this Policy shall be installed unless the City Engineer authorizes the installation of alternative pretreatment technology.
The installation of alternative pretreatment technology will be considered where the installation of a grease interceptor is not feasible due to physical constraints or other considerations.
B. Alternative pretreatment technology includes, but is not limited to, devices that are used to trap, separate and hold grease from wastewater and prevent it from being discharged into the sanitary sewer. All alternative pretreatment technology must be appropriately sized and approved by the City Engineer.
Installation Requirements:
A. Grease interceptor sizing and installation shall conform to the current edition of the California Plumbing Code or other codes adopted by the City of Fortuna.
B. Waste lines leading from sinks, drains, and other fixtures or equipment in FSEs where grease may be introduced into the sanitary sewer system may be required to be connected to a grease interceptor.
C. Gravity grease interceptors shall be constructed in accordance with the City of Fortuna Standard Drawings. The minimum size gravity grease interceptor allowed is 750 gallons. If more than one interceptor will be installed to achieve the required storage capacity, the interceptors shall be DRAFT
installed in series. All interceptors except the final one shall be designed as a single chamber interceptor. Gravity grease interceptors shall not be located in a food or utensil handling area.
D. Trapzilla Hydromechanical Grease Interceptors or Approved Equal shall be a minimum size of 75 gallons per minute unless specifically authorized by the City Engineer.
E. Grease interceptors shall be installed at a location where they are easily accessible for inspection, cleaning, and removal of intercepted grease.
F. Grease traps are not allowed in new construction and remodels unless specifically approved by the City Engineer. Approval shall only be granted in instances where the installation of a gravity grease interceptor, grease removal device, Trapzilla (or Approved Equal), or alternative pretreatment technology is not feasible. Grease traps shall not be located, in a food or utensil handling area.
G. Sanitary wastes shall not be discharged to a grease interceptor.
H. No food waste disposal unit or dishwasher shall discharge into any hydromechanical grease interceptor.
1. Existing facilities with food waste disposal units that discharge to hydromechanical grease interceptors or discharge directly to the sanitary sewer shall remove the food waste disposal unit or connect it to a gravity grease interceptor with a minimum size of 1,000 gallons.
2. Existing facilities with dishwashers that discharge to hydromechanical grease interceptors shall re-route the dishwasher to discharge directly to the sanitary sewer or with the approval of the City Engineer may discharge to a gravity grease interceptor with a minimum size of 750 gallons.
Maintenance Requirements:
A. All grease interceptors/devices shall be maintained in efficient operating condition in conformance with CPC § 1014.1.2 and FMC Chapter 13. Accumulated grease and sediment shall be removed as required. At a minimum gravity grease interceptors and grease traps shall be cleaned when the volume of sediment and grease equals or exceeds 25% of the total depth of the sediment, water, and grease layers.
DRAFT
B. Grease Removal Devices, Trapzillas (or Approved Equals), and Alternative Pretreatment Technologies shall be cleaned and maintained in accordance with the manufactures’ recommendations.
C. No collected waste shall be introduced into the sanitary sewer.
D. All grease interceptors shall be kept free of non-food waste including but not limited to grit, rocks, gravel, sand, eating utensils, cigarettes, trash, towels, and rags.
E. The addition chemicals, enzymes, emulsifiers, live bacteria or other grease cutters or additives used for purposes of grease reduction to a grease interceptor is specifically prohibited.
F. If the City of Engineer determines that a grease interceptor is not being properly cleaned and maintained, the City may mandate a maintenance program. Maintenance programs shall include but are not limited to mandatory cleaning frequencies. Facilities that fail to adhere to a mandated maintenance program may be required to install additional grease interceptors.
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APPENDIX H
SEWER SECTION OF CAPITAL IMPROVEMENT PLAN
DRAFT
City of Fortuna 2023-2024 CIP
Drainage Systems 22
Sewer System Model and Master Plan CIP# 9110
Description
Develop an updated master plan for the sewer system
of the entire City.
Justification
This master plan will provide information that staff
can use to identify improvements needed to develop
future projects to provide proper capacity and
collection of the City’s sewer system.
Studies and Reports
Oscar Larson Sanitary Sewer System Evaluation and
Recommended Improvements Report 2011
Funding Sources
Sewer Reserve Fund 560
Prior Appropriations
N/A
Comments
(Director of Public Works)
Project Cost Estimate
2023 Dollars
1. Planning $165,000 23/24
Total $165,000
DRAFT
City of Fortuna 2023-2024 CIP
Drainage Systems 23
NPDES Compliance Project CIP# 0171
Description
Perform engineering design and permitting for the
treatment plant upgrade and new summertime
effluent disposal location. Restrict flows to Strongs
Creek to 1% of the creek flow and comply with
nutrient effluent limitations. Includes WWTP
Equalization Pond Project
Justification
This project will bring the plant into compliance
with the 2016 permit standards set by the Regional
Water Quality Control Board.
Studies and Reports
GHD 2015 Pre-Feasibility Analysis
Funding Sources
Sewer Reserve Fund 560
Prior Appropriations
Sewer Reserve Fund 560;
Prefeasibility Analysis $178,709
Compliance Project $440,000
SWRCB Grant Fund 360;
Compliance Project $500,000
Comments
The projected costs below are for complete
compliance with the RWQCB including
construction, potential property acquisition(s),
plant upgrades and design. The estimates will
be updated as the analysis is more complete and
a clearer picture of the permit is realized.
(City Engineer)
Project Cost Estimate
2023 Dollars
1. Design $2,000,000 23/24
2. Construction $10,000,000 25/26
3. Construction $10,000,000 26/27
Total $22,000,000
DRAFT
City of Fortuna 2023-2024 CIP
Drainage Systems 24
Sanitary Sewer Lining Project CIP# 9976
Description
Identify locations and contract for lining of
existing sanitary sewer lines at various
locations within the City. Includes from 12th
Street to the parking lot at Forbusco Lumber.
Justification
The City has aging infrastructure, and
especially sewer lines age and crack
resulting in inflow from storm water
impacting the sewage treatment facility, this
will help in alleviating those impacts.
Studies and Reports
SHN 2018 Sanitary Sewer Evaluation Study
Funding Sources
Sewer Reserve Fund 560
Prior Appropriations
$200,000 grant funds SWRCB for
planning
Comments
2nd Avenue was recommended by the
SSES as one of the worst sections in the 2018 study.
(Utilities Superintendent)
Project Cost Estimate
2023 Dollars
1. Design $100,000 23/24
2. Construction $800,000 24/25
Total $900,000
DRAFT
City of Fortuna 2023-2024 CIP
Drainage Systems 25
East Downtown Sewer Replacement Project CIP# 9514
Description
Replacement of the existing sewer line with 6” SDR 35
(plastic) in the alleys between 14th and 15th Street as well as 15th to 16th Street from N Street to P Street. Also on 8th Street from P Street to Main Street.
Justification
The existing line was constructed from clay, which, over time, has led to storm water infiltration of the sewer.
Replacing these lines will reduce the cost of treating this water at the wastewater treatment facility.
Studies and Reports
Identified and recommended by the Utilities Crew.
Funding Sources
Sewer Reserve Fund 560
Prior Appropriations
N/A
Comments
(Utilities Superintendent)
Project Cost Estimate
2023 Dollars
1. Construction $550,000 25/26
Total $550,000
DRAFT
City of Fortuna 2023-2024 CIP
Drainage Systems 26
P Street Sewer Replacement Project CIP# 9121
Description
Replacement of the existing sewer line with 6” SDR
35 (plastic) on P Street in between Garden and 9th
Street, including manhole rehabilitations.
Justification
The existing line was constructed from clay, which
over time has deteriorated and been damaged by
roots. The damage has led to storm- and ground
water infiltration of the sewer. Replacing these lines
will reduce the cost of treating this water at the
wastewater treatment facility.
Studies and Reports
Identified and recommended by the Utilities Crew
while performing sewer camera inspections in 2022.
Funding Sources
Sewer Reserve Fund 560
Prior Appropriations
N/A
Comments
(Utilities Superintendent)
Project Cost Estimate
2023 Dollars
1. Construction $150,000 23/24
Total $150,000
DRAFT
City of Fortuna 2023-2024 CIP
Drainage Systems 27
Hilltop Sewer Main Project CIP# TBD
Description
Extend 6” SDR 35 (plastic) sewer main to
include all of Hilltop Drive (approximately
900 feet).
Justification
Currently the City’s sewer ends at the
intersection of Ridgeview and Hilltop. This
leaves approximately 30 homes on Hilltop
Drive with septic systems. City code requires
anyone within 1,000 feet of City sewer to be
connected to sanitary sewer system. This project
will reduce the inherent ground water pollution
sources from septic systems.
Studies and Reports
Identified by the Utility Superintendent.
Funding Sources
Future Unidentified Grant Funds
Prior Appropriations
N/A
Comments
(Utilities Superintendent)
Project Cost Estimate
2023 Dollars
1. Design $50,000 26/27
2. Construction $450,000 27/28
Total $500,000
DRAFT
City of Fortuna 2023-2024 CIP
Drainage Systems 28
Treatment Plant PLC, VPN, and Hardware Upgrades CIP# TBD Description
Replace defunct SE Modicon PLC Cards, non-functioning VPN, and rewire PLC cabinets (5 total).
Justification
Our Modicon PLCs were discontinued in 2020, and
their end of life is in 2028. With a new plant upgrade
on the way, we need PLCs with extended life that can
keep up with our plant until the next upgrade is needed.
Our VPN has been non-functional since 2020, and we
need secure remote access to our SCADA system at all
times. Wiring is optional, but currently some of our
cabinets are an unlabeled, or mislabeled, mess. Getting PLC addresses properly labeled and all equipment
wired during the plant upgrade can allow for proper
future automation, maintenance, and operation of our
equipment.
Studies and Reports
Identified by the assistant city engineer, wastewater
operations team, and consulting engineers.
Funding Sources
TBD
Prior Appropriations
N/A
Comments
This project could be combined with the Compliance Project, CIP 0171. (City Engineer)
Project Cost Estimate
2023 Dollars
1. Design $50,000 26/27
2. Construction $350,000 27/28
Total $400,000
DRAFT
City of Fortuna 2023-2024 CIP
Drainage Systems 29
Sanitary Sewer Collections System CCTV CIP# 9122
Description
This CIP would fund a sewer camera contractor to assist the City in cleaning and inspecting gravity sewer lines older than 10-years.
Justification
The City is required through a settlement agreement with California River Watch to complete CCTV sewer camera inspection of the entire collection system by May 2024. To date City staff have been able to complete inspections of 12 miles of sewer line, however there are approximately 40 miles remaining. This funding would allow the City to contract with a sewer camera specialist to complete the effort
Studies and Reports
N/A
Funding Sources
Sewer Fund 560
Prior Appropriations
Sewer Fund 560: $250,000
Comments
City staff will proceed with
performing CCTV inspection of as
much of the system as possible prior
to contracting with a specialist to
complete the effort by the compliance date.
(Utilities Superintendent)
Project Cost Estimate
2023 Dollars
1. Construction $600,000 23/24
Total $600,000
DRAFT