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Interceptors & Grease Traps |
- What is an interceptor
Oil and grease removal devices commonly known as oil and
grease interceptors (large, outside) or grease traps
(small, indoors) are required during
the construction of most food service businesses. If
proper cleaning and maintenance of the interceptor or
trap are
not performed on a regular schedule, the device becomes fouled, allowing oil and grease to pass through
the device and accumulate on pipe walls causing
blockages and foul odors.
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How does it work?
(Reprinted with permission from the Town of Cary, NC)
*Note: All liquid
waste haulers that are members of AZFOG are required to use the
cleaning methods described above.
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Recommended Minimum Cleaning Frequency |
- Oil and grease interceptor - Quarterly
- Grease trap - Monthly
- Sand and oil interceptor (auto service/car
washes) - Annually
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Preferred Cleaning Method |
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The preferred method of cleaning an oil and grease interceptor is to
pump out the entire device, which includes removal of all the
contents in the device, and removal of residual wastes after
scraping/hosing down. During cleaning operations, it is recommended
that a representative from the facility be present to make sure all
is completed properly. While the device is empty, an inspection
should be conducted to verify that there are down-turned elbows/tees
on the inlet and outlet piping, and that they are in good condition.
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Best Management Practices for grease
interceptors and traps |
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DO ... |
DON'T ... |
- Scrape food waste from all dishes, pots,
pans, cookware, and equipment to the garbage before pre-wash.
- Set up a regular cleaning schedule for your
interceptor/grease trap with your maintenance vendor.
- Keep all maintenance/service records or
copies of records at facility for a minimum of three years.
- Have a company representative inspect the
cleaning of the interceptor/grease trap to ensure it was completed
properly.
- Train all employees on proper food and grease
waste handling techniques.
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- Do not allow the waste hauler to decant
wastewater from the truck back into the device or into your sanitary
sewer connection.
- Do not dispose of grease wastes into the
sewer drain.
- Do not clean equipment outside where grease
and food wastes will flow into storm drains or dry wells.
- Do not wait until your grease removal device
is overflowing with waste to get it cleaned.
- Do not dump old chemicals (e.g. pesticides,
herbicides) into the drain.
- Do not use a drain opening chemical to open a
clogged drain (call a professional plumber to evaluate the
situation).
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