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Wastewater

Phone: 913-715-8500

11811 S. Sunset Drive, Suite 2500, Olathe, Kansas 66061

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JCW Non-concrete Gravity Grease Interceptor Unit Acceptance Criteria for Manufacturers

JCW Non-concrete Gravity Grease Interceptor Unit Acceptance Criteria for Manufacturers

Refer to the JCW Grease Management: Grease Waste Plumbing, Interceptor Design and JCW Inspections page for JCW design standards and inspection requirements.

1. Non-concrete Gravity Grease Interceptor (NCGGI) unit manufacturers must electronically submit information for each model\unit to Johnson County Wastewater (JCW) for review, development and JCW acceptance of the NCGGI unit’s installation detail before the model may be included for project permitting and installed in JCW’s service area. JCW will coordinate with the manufacturer to develop a JCW NCGGI Unit Installation Detail for each NCGGI unit accepted for use.

2. Only NCGGI units with a NCGGI Unit Installation Detail accepted by JCW may be permitted and used in JCW’s service area.

3. Only projects with a JCW accepted NCGGI Unit Installation Detail will be accepted for permit review.

4. Elements required for development of the JCW NCGGI Installation Detail for each NCGGI unit include (and may not be limited to):

a. Each model\unit shall comply with IAPMO/ANSI Z1001‐2016 and IAPMO/ANSI Z1000 including:

i. Fiber-reinforced polyester used for manufacturing grease interceptors and

components shall comply with Section 6 of IAPMO/ANSI Z1000.

ii. Thermoplastic grease interceptors shall comply with Section 7 of IAPMO/ANSI Z1000.

iii. Steel grease interceptors shall comply with Section 8 of IAPMO/ANSI Z1000.

Provide certification(s) accordingly.

b. Designs shall be for single stand-alone unit with a minimum volume of 1000 gal and a maximum volume of 2000 gal. Interceptors in series or parallel generally may not be used.

c. A 90-day pumping and cleaning frequency is the standard.

d. For units with ASME A112-14-3-2018 (Type D) certification, provide a copy of the certification and all certification test data indicating grease capacity and efficiency in accordance with Section 3.4.6 including incremental test data to breakdown in accordance with Section 3.4.6.2.  For a unit that has not been certified under ASME A112-14-3-2018 or has inlet, outlet and baffle arrangements that differ from JCW’s standard concrete interceptor detail and specification, provide other supporting performance data for JCW review and pilot test installation consideration.

e. Watertight pickable cast iron covers meeting AASHTO M306 H20 Traffic Rating are required. Composite lids may not be used.

f. Each unit shall be designed for an exterior buried installation.

g. A H20 load bearing protective concrete slab is required for all units. The design for the H20 slab sealed by a Kansas PE must be included on the JCW NCGGI Unit Installation Detail.

h. Under JCW standards, JCW will witness infiltration testing of the interceptor, risers and castings after backfill has been completed to finish grade. The test method shall be included on the JCW NCGGI Unit Installation Detail. Contact JCW with any questions regarding methodology.

i. Include a two-way tee cleanout immediately upstream of the unit and a vented sampling port on the outlet of each unit on the detail. Refer to JCW’s standard two-way cleanout\sampling port detail.

j. Clearly label the minimum and maximum burial depths on the JCW NCGGI Unit Installation Detail.

k. Provide core sample measurement limits for the “full” grease and “full” solids for the unit on the JCW NCGGI Unit Installation Detail.

l. JCW inspection is required at several steps during the installation of the interceptor and grease waste system. Manufacturer’s representatives are urged to include this JCW inspection awareness in discussions with the installer to avoid rework. Required inspections such as the following examples will be included in JCW’s Permit:

1. Interior Grease Plumbing Inspection. In addition to the City interior plumbing inspection, JCW inspection of the grease waste plumbing and fixtures inside the building is required prior to pouring the interior slab.

2. Grease Interceptor Installation Inspections

a. Partial Inspection #1: JCW inspection of the excavation, interceptor, riser(s) and anchor kit (if applicable) is required prior to backfill.

b. Partial Inspection #2: Haunched pipe, backfill, cleanout and sampling port shall be inspected prior to pipe backfill.

3. Grease Interceptor and Risers Vacuum/Leak Test Inspection. JCW must witness the interceptor and risers test noted on the JCW NCGGI Unit Installation Detail.

4. Grease Interceptor H20 Concrete Slab Rebar Inspection. JCW inspection of the rebar configuration is required prior to pouring the concrete slab.

5. H20 Concrete Slab Installation Inspection. JCW inspection of the completed concrete slab including placement of castings within the slab is required at completion of the concrete pour (before concrete set).

JCW Manufacturer Criteria for Non-conc Gravity Interceptor Unit Acceptance 12-21-20 (Pending JCW ESC final review)

 

JCW Hydromechanical Grease Interceptor Unit Acceptance Criteria for Manufacturers

JCW Hydromechanical Grease Interceptor Unit Acceptance Criteria for Manufacturers

Refer to the JCW Grease Management: Grease Waste Plumbing, Interceptor Design and JCW Inspections page for JCW design standards and inspection requirements. 

1. Hydromechanical grease interceptor (HGI) manufacturers must electronically submit information for each model\unit to Johnson County Wastewater (JCW) for review, coordination and acceptance of the HGI unit’s installation detail before the model may be permitted and installed in JCW’s service area. JCW will coordinate with the manufacturer to develop the JCW HGI Unit Installation Detail for each HGI unit accepted for use.

2. Only HGI units with a HGI Unit Installation Detail accepted by JCW may be permitted and used in JCW’s service area.

3. Only projects with a JCW accepted HGI Unit Installation Detail will be accepted for permit review.

4. Elements required for development of the JCW HGI Installation Detail for each unit include (and may not be limited to):

a. Each model\unit shall be certified to ASME A112-14-3-2018 Type C or D 100 gpm. Identify the Type (C or D) and provide all certification test data indicating grease capacity and efficiency in accordance with Section 3.4.6 including incremental test data to breakdown in accordance with Section 3.4.6.2.

b. Units requiring external flow control may not be used. Units without integral flow control are preferred. Where integral flow control devices are required for the unit, the integral flow control devices shall be serviceable from finish grade and instructions for accessing the integral flow control device shall be included on the detail.

c. Designs shall be for single stand-alone unit with a minimum 2500 lb grease capacity on a 90-day cleaning frequency. Interceptors in series or parallel may not be used.

d. Watertight pickable cast iron covers meeting AASHTO M306 H20 Traffic Rating are required. Composite lids may not be used.

e. Each unit shall be designed for an exterior buried installation.

f. A H20 load bearing protective concrete slab is required for all units. The design for the H20 slab sealed by a Kansas PE must be included on the JCW HGI Unit Installation Detail.

g. Under JCW standards, infiltration testing of the installed interceptor, risers and castings is required. The test method shall be included on the JCW HGI Unit Installation Detail. Contact JCW with any questions regarding the method.

h. Include a two-way tee cleanout immediately upstream of the unit and a vented sampling port on the outlet of each unit on the detail. Refer to JCW’s standard two-way cleanout\sampling port detail.

i. Clearly note minimum and maximum burial depths on the JCW HGI Unit Installation Detail.

j. Provide core sample measurement limits for the “full” grease and “full” solids in each unit on the JCW HGI Unit Installation Detail.

k. JCW inspection is required at several steps during the installation of the interceptor and grease waste system. Manufacturer’s representatives are urged to include this JCW inspection awareness in discussions with the installer to avoid rework. Required inspections such as the following examples will be included in JCW’s Permit:

1. Interior Grease Plumbing Inspection. In addition to the City interior plumbing inspection, JCW inspection of the grease waste plumbing and fixtures inside the building is required prior to pouring the interior floor slab.

2. Grease Interceptor Installation Inspections

a. Partial Inspection #1: JCW inspection of the excavation, interceptor, riser(s) and anchor kit (if applicable) is required prior to backfill.

b. Partial Inspection #2: Haunched pipe, backfill, cleanout and sampling port shall be inspected prior to pipe backfill.

3. Grease Interceptor and Risers Vacuum\Leak Test Inspection. JCW must witness the interceptor and risers test noted on the JCW HGI Unit Installation Detail.

4. Grease Interceptor H20 Concrete Slab Rebar Inspection. JCW inspection of the rebar configuration is required prior to the slab pour.

5. H20 Concrete Slab Installation Inspection. JCW inspection of the completed concrete slab including placement of castings within the slab is required at the completion of the concrete pour.

JCW Hydromechanical Interceptor Manufacturer Criteria for Unit Acceptance 11-2-20 (Pending JCW ESC final review)

JCW Accepted Non-Concrete GGI Units

Refer to the JCW Grease Management: Grease Waste Plumbing, Interceptor Design and JCW Inspections page for JCW design standards and inspection requirements.

The grease interceptor units listed in the table below have been accepted for use in Johnson County Wastewater’s (JCW) service area. A JCW Permit is required for all interceptor installations, replacements and repairs. Please contact JCW’s FOG\Commercial Review team at 913-715-8520 to obtain a copy of the detail accepted by JCW for the unit before applying for the JCW permit.

Interceptor Type

Material

Manufacturer and Model

Gravity – Non-concrete

Fiberglass Reinforced Plastic

Zurn Proceptor GMC 1500(2) UPC (Two 750 Gal Tanks)

     
     
     

JCW Accepted Hydromechanical Grease Interceptor (HGI) Units

Refer to the JCW Grease Management: Grease Waste Plumbing, Interceptor Design and JCW Inspections page for JCW design standards and inspection requirements.

The grease interceptor units listed in the table below have been accepted for use in Johnson County Wastewater’s (JCW) service area.  A JCW Permit is required for all interceptor installations, replacements and repairs.  Please contact JCW’s Commercial Review team at 913-715-8520 to obtain a copy of the detail accepted by JCW for the unit before applying for the JCW permit.

Interceptor Type

Material

Manufacturer and Model

Hydro-mechanical

Polyethylene

Schier GB-500 – Type C

Hydro-mechanical

Polyethylene

Schier GB-1000 – Type C

     
     
     
     

Grease Management: Grease Waste Plumbing, Interceptor Design and JCW Inspections

Grease Management: Grease Waste Plumbing, Interceptor Design and JCW Inspections

Johnson County Wastewater (JCW) permitting is required for all Food\Beverage Service\Prep Facilities (FSF) and for interceptor installations, replacements and repairs. JCW’s FOG\Commercial Review Team may be contacted at 913-715-8520 for information about JCW’s permitting and inspection processes.

 

Grease Waste Plumbing

The following are requirements for fixture plumbing in Food Service Facilities in JCW's service area: 

  1. Grease Waste Fixtures:

a. Toilets, urinals and similar domestic waste fixtures SHALL NOT be connected to the interceptor.

b. Garbage disposals or grinders are prohibited in new food service facilities.

c. The following fixtures MUST NOT be connected to the grease interceptor:

i. Drains receiving condensate.

ii. Drink station and ice machine drains.

iii. Bar sinks not receiving significant quantities of grease.

iv. Hot and cold well drains.

v. Hand wash sinks in general.

d. The following fixtures MUST be connected to the grease interceptor:

i. Dishmachines: Low temperature chemical (e.g., chlorine) sanitizing.

ii. Dishmachines: High temperature sanitizing. Must include a device to mix cold water with the discharge to reduce the discharge temperature to 140° F or less.

iii. Two and three compartment sinks, prep sinks, pre-rinse sinks, dump sinks, etc.

iv. Mop sinks, utility sinks.

v. Kitchen equipment drains (including the floor sinks serving the equipment) - wok drains, tilt kettles, ice cream\custard\etc production machines, ice cream dipper wells, etc.

vi. Floor and trench drains in grease-prone prep and cooking areas.

e. Connect hand wash sinks to the sanitary line in general. Hand wash sinks may be connected to grease waste when the sanitary line is not in close proximity.

  1. Interceptor venting must be connected to the building waste vent piping in accordance with the JCW accepted unit detail and the plumbing code.

 

Gravity Grease Interceptors (GGIs) General

  1. Gravity grease interceptor (GGI) installations for food\beverage service\prep facilities (FSFs) permitted for use in Johnson County Wastewater’s (JCW’s) service area shall be a single stand-alone unit with a minimum 1000 gallon and maximum 2000 gallon volume. Units in parallel shall not be used.  Units in series may generally not be used.
  2. A 90-day pumping and cleaning frequency is standard.
  3. For a standard concrete gravity grease interceptor, use JCW's Standard Concrete Gravity Grease Interceptor Detail and modify the detail to reflect the required volume and piping arrangement for the project.
  4. Only Non-concrete Gravity Interceptor (NCGGI) Units accepted by JCW may be permitted and used for new installations and replacements in JCW’s service area. See the JCW Accepted Non-Concrete Gravity Grease Interceptor Unit List for accepted unit(s) and contact JCW to obtain the current JCW accepted detail before applying for the JCW permit.  FSF projects with a NCGGI will be accepted for review only if the proposed interceptor unit has been accepted by JCW.  Refer manufacturers to the JCW Non-Concrete Gravity Grease Interceptor Unit Acceptance Criteria for Manufacturers for unit requirements and review information.

Gravity Grease Interceptor (GGI) Sizing

1. For all new interceptors and replacements, a Kansas PE shall determine the Drainage Fixture Units (DFUs) connected to the gravity interceptor in accordance with JCW grease waste plumbing standards and in correlation with UPC criteria and size the interceptor as follows:

a. DFU values for each fixture directly connected to the interceptor (including floor and trench drains) shall be included in the calculations. Each fixture shall be assigned value based on “Fixture Size” (per UPC Table 709.2) and as noted in the Drainage Fixture Unit (DFU) Value Calculations Table.

b. The DFU load of an indirect waste receptor (e.g. floor sinks) receiving the discharge of indirectly connected fixtures shall be the DFU value for the indirect waste receptor except as noted herein.

c. The DFU value for equipment with intermittent drainage (e.g. use the manufacturer’s rated “Flow” for commercial dishmachines) shall be assigned fixture unit values (per UPC Table 702.2(b)) as noted in the DFU Calculations Table below.

d. DFUs for equipment with continuous drainage (e.g. water-cooled wok range) shall be assigned 2 DFUs for each gallon per minute (GPM) of rated flow (per UPC Section 709.3) and added to the DFU Calculations Table.

e. Include the Drainage Fixture Unit Value (DFU) Calculations Table with the sealed interceptor sizing calculations.

2. Gravity interceptor volume shall be sized using the calculated DFUs and the following Gravity Grease Interceptor Volumes table (per UPC 1014.3.6) with 1000 gal minimum and 2000 gal maximum:

Gravity Grease Interceptor Volumes

Drainage Fixture Units (DFUs)

Interceptor Volume (gal)
Up to 35 1000
Up to 90 1250
Up to 172 1500
Up to 216 2000

3. Where DFUs for a future FSF(s) are unknown, the interceptor shall be sized based on the maximum DFUs allowed for the pipe size (per UPC Table 703.2) connected to inlet of the interceptor. An inlet pipe size of 4 inches corresponds with up to 216 DFUs and a 2000 gallon interceptor. If the pipe size and corresponding number of DFUs may exceed 216, please contact JCW’s FOG\Commercial Review team at 913-715-8520 to discuss options.

 

Hydromechanical Grease Interceptors (HGIs) General

  1. Only Hydromechanical Grease Interceptor (HGI) units accepted by JCW may be permitted and used for new installations and replacements in JCW’s service area. Please see the JCW Accepted Hydromechanical Grease Interceptor Unit List for accepted HGI units and contact JCW to obtain the current JCW HGI Unit Installation Detail for the selected unit.
  2. FSF projects will be accepted for review only if the proposed interceptor unit has been accepted by JCW. Refer manufacturers to the JCW Hydromechanical Grease Interceptor Unit Acceptance Criteria for Manufacturers for unit requirement and review information.
  3. A 90-day pumping frequency is standard.
  4. A minimum 2500 lb interceptor grease capacity is required for facilities with grease production of up to 2500 lbs in the 90-day pump period.
  5. A single larger unit with capacity meeting the calculated grease production estimate is required where grease production exceeds 2500 lbs in 90 days.

Hydromechanical Interceptor (HGI) Sizing

1. For a FSF with a known FSF operator:

Provide grease production calculations (sealed by a Kansas PE) using the proposed number of meals per day provided by the FSF owner\operator in the JCW Food\Beverage Facility Supplemental Application and the grease production value based on the type of FSF. Select the Grease Production Value from Table 8-3 and refer to the calculation example below. Contact a JCW FOG\Commercial Group member at 913-715-8520 to discuss Restaurant Type for facilities not found in the Examples Table.

Table 8-3 is reprinted with permission from ASPE Plumbing Engineering Design Handbook, Volume 4. (C) 2016, American Society of Plumbing Engineers. All rights reserved.

Table 8-3 Example Grease Production Values for Restaurants
Restaurant Type Grease Production Values Examples

Low Grease Producer

0.005 lbs/meal (no flatware)

Elementary cafeteria, grocery meat department, hotel breakfast bar, sub shop, sushi, take and bake pizza
0.065 lbs/meal (with flatware)

Medium Grease Producer

0.025 lbs/meal (no flatware) Cafe, coffee shop, convenience store, grocery deli, Greek, Indian, Japanese, Korean, Thai, Vietmanese
0.0325 lbs/meal (with flatware)
High Grease Producer 0.035 lbs/meal (no flatware) Full-fare family, fast-food hamburger, hamburger bar and grill, German, Italian, fast-food Mexican
0.0455 lbs/meal (with flatware)
Very High Grease Producer 0.058 lbs/meal (no flatware) Full-fare BBQ, fast-food fried chicken, full-fare Mexican, steak and seafood, Chinese, Hawaiian
0.075 lbs/meal (with flatware)

Grease Production Calculation Example : A full fare BBQ FSF serving approximately 350 meals per day on washable dishes and flatware with a 90-day pump schedule. Select the “Very high grease producer (with flatware)” value from Table 8-3 and calculate the daily grease load as follows: 350 meals per day × 0.075 lbs per meal = 26.25 lbs of grease per day. For a 90-day pump schedule at 26.25 lbs per day, 2362.5 lbs of grease storage capacity is required. The calculated capacity is less than JCW minimum 2500 lbs; therefore, use a minimum 2500 lb capacity HGI unit.

  1. For a future FSF with an unknown FSF operator:

a. Provide grease production calculations based on square footage of the entire space. At minimum, use an average of 0.171 meals per square foot per day, a grease production value of 0.0455 lbs per meal and 90-day pump out.

b. A minimum 2500 lb grease capacity unit is required for a space up to 3500 square feet.

c. A single larger unit is required if the estimated grease production exceeds 2500 lbs in 90 days.

  1. Hydromechanical units may not be used for multiple tenant Common Interceptor installations.

 

Interceptor Decommissioning

A FSF with an existing interceptor in proper operating condition that is not required to have an interceptor (or a non-FSF tenant moving in to a former FSF space) must request JCW evaluation of the following options:

1. Request a Pumping Variance to reduce pumping frequency. Or,

2. Temporary Decommissioning. If JCW has verified the interceptor is in proper operating condition, the Building Owner and FSF may request temporary permanent decommissioning of the interceptor. All temporarily decommissioned interceptors shall be pumped on reduced pumping frequency.

3. Permanent Decommissioning. Interceptors that are not in proper operating condition must be permanently decommissioned.

Contact JCW’s FOG\Commercial Review team at 913-715-8520 to discuss options and for complete requirements.

 

JCW Inspections

  • Existing Interceptors - A pre-application inspection is required for all facilities with an existing interceptor. Contact JCW’s FOG\Commercial Review team at 913-715-8520 to schedule the inspection.
  • Interior Grease Waste Piping - Johnson County Wastewater shall inspect the interior plumbing fixtures attached to the interceptor before the plumbing is covered as noted on the JCW Permit. Schedule this inspection through the project record at mygovernmentonline.org.
  • New, Replacement or Repaired Interceptors - Johnson County Wastewater shall inspect the interceptor, interceptor repairs and exterior piping prior to backfilling and after inspection of the interior piping at several stages of the installation or repair as noted on the JCW Permit. Schedule these multiple inspections through the project record at mygovernmentonline.org.
  • Operating Permit Inspection – Two weeks before the opening of the FSF, schedule the required FSF Opening Inspection – BMPs and Education through the project record at mygovernmentonline.org.