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UPC Chapter 10 Changes Orange County FOG Control Program Implementation

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ASPE / IAPMO Orange County Chapter Meeting October 2007 ... a mop sink, and two public restrooms each with one water closet and one lavatory ... – PowerPoint PPT presentation

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Title: UPC Chapter 10 Changes Orange County FOG Control Program Implementation


1
UPC Chapter 10 ChangesOrange County FOG Control
Program Implementation
  • John Shaffer
  • Environmental Engineering Contracting, Inc.
    (EEC)
  • (714) 667-2300

ASPE / IAPMO Orange County Chapter Meeting
October 2007
2
Uniform Plumbing Code (UPC) Changes
  • Significant Changes to Chapter 2 and Chapter 10
  • Adopted in the 2006 UPC
  • Adopted in the 2007 California Plumbing Code
    (CPC)
  • Removal of Appendix H
  • Outdoor Underground Grease Interceptor Sizing
    Incorporated into Chapter 10

3
Name Changes(Chapter 2)
  • Gravity Grease Interceptors
  • Commonly known as Outdoor Underground Grease
    Interceptors
  • Hydromechanical Grease Interceptors
  • Formerly named Grease Traps
  • Grease Removal Devices
  • Commonly known as Automatic Grease Traps or
    Automatic Grease Removal Units
  • FOG Disposal Systems
  • Very rare, there is one Biological Grease Trap
    that may fall under this category

4
Grease Interceptor(s) for Each Grease Waste Line
(Chapter 10)
  • 1014.1 Where it is determined by the Authority
    Having Jurisdiction that grease pretreatment is
    required, an approved type of grease
    interceptor(s) complying with the provisions of
    this section shall be correctly sized and
    properly installed in the grease waste line(s)
    leading from sinks and drains
  • Note In previous UPC editions, this wording was
    singular which lead to many FSEs being approved
    to install one grease control device in one
    grease waste line without a grease control device
    in other grease waste lines.

5
Grease Interceptor Maintenance (Chapter 10)
  • 1014.12 If 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.
  • Note Many agencies already mandate a maintenance
    program regardless of the Code language

6
Gravity Grease Interceptor (GGI) Sizing (Chapter
10)
  • Appendix H Table H-1 has been replaced by Table
    10-3
  • Table 10-3 is based on
  • Drainage Fixture Units (DFUs) - Number and size
    of fixture traps in the kitchen (UPC Chapter 7)
  • DFUs determine interceptor inlet pipe size and
    slope
  • Converted into gallons per minute (gpm) based on
    half-full pipe and slope
  • Minimum 30-minute retention time

7
GGI Sizing
Table 10-3 (Expanded UPC Table)
Extrapolated due to large differences in Max.
DFUs and to allow for installation of common
interceptor sizes
8
GGI Sizing
Table 10-3 (Condensed)
Example 1 Typical fast food kitchen 17 DFUs
750 gallons Example 2 Typical larger FSE
kitchen 45 DFUs 1,250 gallons
9
GGI Sizing Example
  • 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 indirect waste from the ice
    machine - a mop sink, and two public restrooms
    each with one water closet and one lavatory
  • Kitchen Drain Line DFUs Count (From Table 7-3)
  • 3 floor drains _at_ 2 DFUs each 6 DFUs
  • 1 mop sink _at_ 3 DFUs each 3 DFUs
  • 1 food prep sink _at_ 3 DFUs each 3 DFUs
  • Total 12 DFUs
  • Using Table 10-3, the grease interceptor will be
    sized at 750 gallons

10
GGI Sizing Implementation
  • Most agencies have not yet adopted the 2007 CPC
  • Some agencies are
  • Using the new GGI sizing as a variance while they
    wait to adopt the 2007 CPC
  • Using the new GGI sizing as a minimum sizing
  • Waiting until the new CPC is adopted before
    changing
  • Not comfortable with the new sizing formula
  • Developing their own GGI sizing criteria
  • Hybrid of the 2003 2006 sizing criteria
  • or
  • Their own preference (e.g., 750 gallon
    interceptors for all small FSEs)

11
Shared GGIs
  • Many agencies are allowing more shared GGIs
  • Adding up the DFUs or anticipated maximum DFUs

12
HGIs
  • Most agencies still prefer, and are requiring,
    GGIs if there is space
  • The grease trap name change has not had a big
    impact
  • The Orange County Health Care Agency is now
    reviewing and approving HGI placement

13
GRDs
  • Many agencies are now allowing GRDs, but they
    still prefer GGIs
  • The Orange County FOG Control Study provided
    recommendations on GRD installation, maintenance
    and inspection issues
  • The Orange County Health Care Agency is now
    reviewing and approving GRD placement

14
Sewer District Issues
  • When Sewer Districts overlap one or more cities
  • Some cities defer to the sewer districts FOG
    control expertise and approval
  • Some cities do not recognize the sewer districts
    role
  • Some sewer districts and cities are still working
    these issues out

15
Miscellaneous
  • Some cities/sewer districts are intimately
    involved in evaluating / approving GGI, HGI, and
    GRD plans based on the new UPC
  • Other cities/sewer districts are operating the
    same way they have in the past
  • Some cities/sewer districts are inspecting the
    maintenance of GGIs, HGIs, and GRDs
  • Others are not
  • Some cities/sewer districts are enforcing the
    25 Rule to ensure the proper maintenance of
    GGIs
  • Some are enforcing the 25 Rule to ensure the
    proper maintenance of HGIs and GRDs as well

16
Grease Interceptor/Trap Maintenance Enforcement
  • 25 Rule
  • The combined depth of the FOG layer and solids
    layer cannot exceed 25 of the total liquid depth
    of the interceptor or trap.

17
  • QUESTIONS?
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