Grease Interceptor Pump Out Procedure
PROPER PUMP OUT PROCEDURE
FOR GREASE INTERCEPTOR
(BMP 219-A)
“Think before you put it down the Sink”
If the grease and solids occupy greater than 25 percent of an interceptor’s total liquid
depth, the FSE is required to perform a full cleaning of the grease interceptor. Cleaning
must be performed by a licensed waste hauler with an approved license from an
authorizing agency. Both vaults of a grease interceptor shall be left completely empty
upon completion of pumping operation. The grease mat, liquids, sludge, and scrapings
from the interior walls must be removed. Under no circumstances, may the waste hauler
reintroduce the removed water or materials be reintroduced into the City’s sewer
system, other than at qualified disposal stations. Flushing an interceptor with hot water,
or the use of chemicals or other agents to dissolve or emulsify grease and allow it to
flow into the wastewater treatment system, is a violation of City Code.
Since the FSE is the generator of the grease waste, is liable for the condition of their
pretreatment devices, and is paying for the cleaning service, the FSE owner or
designee may want to witness all cleaning/maintenance activities to verify that the
Grease Interceptor is being fully cleaned and properly maintained.
Step 1: Skim the entire grease cap and debris from the top of the interceptor. The
interceptor may need to be agitated slightly to loosen the grease cap
Step 2: Place vacuum tube all the way into the interceptor to suck remaining
solids from the bottom.
Step 3: Vacuum water out of the interceptor.
Step 4: Scrape and clean the sides and bottom of the trap. This may be done by
“back flowing” the water from the pump truck or by using a hot water
source to pressure wash the interceptor. Make sure the walls and baffles
of the trap are completely clean.
Step 5: Vacuum remaining water out of the trap.
Step 6: Check that the sanitary “T’s” on the inlet and outlet sides of the
interceptor are not clogged or loose.
Step 7: Make sure that the baffle is secure and in place.
Step 8: Inspect the interceptor for any cracks or defects.
Step 9: Check that lids are securely and properly seated after completion of
pumping.