Grease traps are generally not installed anymore in apt/condo due to problems (people never service them). I know that the plumbing insp's don't like to see them and don't generally ask for one.
Some developers will install an interceptor in the basement that can be serviced instead of all those individual units.
I'll try to get ahold of one of the City PI today and respond tonight.
As per 07 City code
- 18-29-1002.1 exception #3 the grease trap 'may' be installed
- 18-29-1003.1.1 depending on interpretation does not require a grease trap
- 18-29-1003.2 "Wastes that do not require treatment or separation need not be discharged into any interceptor or separator".
- 18-29-1003.3.1 where required
- 18-29-1003.13 access and maintenance requirements

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Accurate Inspections & Consulting, Inc.
847/736-9975
Markus Keller