Approved HGI sizing worksheet 7-11-22RECEIVED
BLD2022-0878 Jul 05 2022
CITY OF EDMONDS
DEVELOPMENT SERVICES
Hydromechanical Grease Interceptor Sizing Works C
Facility Name: % e-. sc o ) we 1,
Address: 3c2o S * z+vS &do Suite No.:
• A Hydromechanical Grease Interceptor (HGI) plumbing permit is required ($165.00 fee).
Contact the Pretreatment Technician (425-771-0237 ext. 1357) if you have any questions
regarding this form.
• Dishwashers are not allowed to be connected to a HGI.
• Food disposers are not allowed in a facility served by a HGI and must be disabled or
removed. Solids must be screened out and placed in the solid waste container.
Fixture Capacity in Cubic
Inches
L x W x D x no. of sinks)
Fixture Capacity Drainage Load 11
in Gallons (75% of Total
Cu. In. - 231 Ca aci )
Flow Rate for
a 2-Minute
Drain Period
#1
/B X le X-f 2x = 11 c.i.
-231=--o. al.
x .75 = 31.07 gal.
-2=I FIP3 gpm
#2
x x x = c.i.
_ 231 = al.
x .75 = gal.
_ 2 = gpm
#3
x x x = c.i.
_ 231 = gal.
x .75 = gal.
_ 2 = gpm
#4
x x x = c.i.
- 231 = gal.
x .75 = gal.
- 2 = gpm
HGI #1- Total drainage flows from maximum of 4 fixtures
gpm
#1
x x x = c.i.
- 231 = gal.
x .75 = gal.
_ 2 = gpm
#2
x x x = c.i.
_ 231 = gal.
x .75 = gal.
- 2 = gpm
#3
x x x = c.i.
- 231 = gal.
x .75 = gal.
- 2 = gpm
#4
x x x = c.i.
_ 231 = gal.
x .75 = gal.
- 2 = gpm
HGI #2 - Total drainage flows from maximum of 4 fixtures
gpm
#1 Hydromechanical Grease Interceptor Size (in gpm)
35
1 50
75
100 or
reater
#2 Hydromechanical Grease Interceptor Size (in gpm)
35
50
75
100 or
greater
If the calculated size is less than 35 gpm please circle the 35 gpm box.
The Minimum Hydromechanical Grease Interceptor size is 35 gpm as per City of Edmonds
Pretreatment Ordinance.
City may upsize for factors such as low temp/high volume dishwashing, if permitted, or
high oil/grease content on menu, etc.
-------- ------------------------------ (For City use only below this line) -------------------
Remarks
Size Approved: 23 S gpm Approved by: Date: 11 �od•l
'l-cil'L'aFi Ilt Technician
[Revised 1/7/2022]
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