UPDATED
8/18/97
BEST
MANAGEMENT PRACTICES FOR
AIRCRAFT
MAINTENANCE/REPAIR FACILITIES
AND
MACHINE SHOPS
Best
management practices can be thought of as using "good housekeeping"
practices. Listed below are several procedures to
operate your facility
and
minimize the risk of contamination to the environment.
1. A
waste oil and waste fluid collection area must be set up. This
area
must have a bermed, impervious surface and be under cover.
Wastes
are to be stored in clearly marked containers that are in
good
condition. Leaking containers must be
replaced. Strippers,
chlorinated
solvents and flammable solvents are hazardous and must
be
stored separately. Coolant must also be stored separately. All
waste
must be segregated. Therefore, no
mixing of waste streams
should
be done.
.
a. Waste
oil is normally recycled and taken by a permitted waste
oil
hauler. A list of waste oil haulers is
available upon
request. All containers must be labeled with the
words
"waste
oil" according to State regulations.
b.
Chlorinated solvents,
strippers of flammable solvents may be
recycled
using a solvent recycler (with approval from DERM)
or
disposed of as hazardous waste. This
waste must be
shipped
by a permitted hazardous waste hauler to an approved
EPA
treatment or disposal facility. A list
of hazardous
waste
haulers is available upon request.
c.
Waste antifreeze/coolant must
be collected and shipped by an
approved
hazardous waste hauler. This waste may also by
recycled
with a recycling service or on-site equipment.
d.
Used oil filters must be
collected and handled by a
permitted
hauler or recycler. All fluids must be
drained
from
filters prior to disposal. These
filters cannot be
disposed of in
the trash/dumpsters unless a waste profile
indicates
they meet landfill standards and approval is
granted
from this department. A list of oil
filter recycler
is
available upon request.
e.
Rags used in cleaning
processes and contaminated with
hazardous
materials (i.e.. solvents, inks, oil & grease) must
be
washed by an approved rag service or handled as a
hazardous
waste unless proven otherwise by a hazardous waste
2. Parts
washing may not be done over open ground.
Parts washing
must
be done in a container or parts washer.
The parts can be
rinsed
or air dried over the parts cleaning container. Absolutely
no
fluid, not even rinse water, is to be disposed of to open
2. Parts
washing may not be done over open ground.
Parts washing must be done in
a container or parts washer. The parts
can be rinsed or air dried over the parts cleaning container.
Absolutely no fluid, not even rinse water , is to be disposed of to open
ground, storm drains, septic
tanks or any drainage structure.
Research has shown that this rinse water contains solvents,
metals and oil and grease. Dirty parts washing fluid may be recycled or
disposed of properly as previously
discussed above. A permitted part
washing contractor who brings new
fluid and takes away the sludge and dirty fluid is the preferred disposal method.
3. Paint
thinners, solvents, spent solvents and solvent mixtures are
hazardous
waste and must be properly disposed of by a permitted
hazardous
waste transporter (or the solvent can be recycled by a
recycling
unit or distilled and recycled using a solvent recovery
unit
at your facility. Recycle and
distillation units must be
approved
by this Department prior to implementation and use.
a.
If the waste solvent is
recycled by the facility generating
the
waste, the solvent stillbottoms must be collected and
treated
as hazardous waste, unless proven otherwise.
b.
If the waste solvent is
recycled by a permitted solvent
recycler,
receipts must be obtained from the recycler and
maintained
at your facility.
c.
Storage containers must be
compatible with the hazardous
waste
stored in them and must meet DOT standards.
Each
container
must have a proper hazardous waste label marked
with
the first date of accumulation, contents and facility
name,
address and EPA number.
d.
In all cases when a RCRA
hazardous waste is produced, a
permitted
hazardous waste transporter must be used to
transport
the waste to a federally approved hazardous waste
disposal
facility. Hazardous waste manifests
must be kept at
your
facility available for review. The
facility generating
the
hazardous waste is required to obtain an Environmental
Protection
Agency identification number by contacting:
Notification
Coordinator
Bureau
of Waste Planning and Regulation
Florida
Department of Environmental Protection
Twin
Towers Office Building, Room 421
2600 Blair Stone Road
Tallahassee,
Florida 32399-2400
(904) 488-4805
4. Acids
and plating wastes are hazardous waste.
Therefore, these
materials
must be disposed of as described above.
5. Paint
stripping must be conducted so that the waste does not enter
storm
drains, surface waters or sanitary sewers.
Collect scrapings,
paint
removal sludges and all other wastes from paint work and
dispose
of properly. Paint wastes are generally classified as
hazardous
waste. Therefore, they must be disposed
of as
hazardous waste as described above.
6. Wastewater
generated from crack detection processes must be
properly
disposed off. Crack detection for both
ferrous and
non-ferrous
materials generate a large amount of wastewater. This
wastewater
can be discharged (if it meets Dade county sewer
discharge
standards) to sanitary sewers by treating it with an
approved
pretreatment system. Evaporation units
are also
available
to reduce the amount of wastewater. Evaporation units
and
pretreatment systems must be approved by this Department prior
to
installation and use. Additionally, the
evaporation unit will
require
an Air permit from this Department.
All sludges and/or
waste
filters generated from these processes must be profiled for
determination
of proper disposal.
7. Waste
sand or beads generated from blasting activities must be
profiled
to determine proper disposal method. If
waste is to be
disposed
of in the Dade county landfill it must be profiled on a
yearly
basis to assure it meets landfill standards.
8. Facilities
generating 10 or more used mercury containing lamps
[fluorescent
and high intensity discharge (HID)] must be recycled
with
an approved hauler. Do not break or
crush lamps
intentionally
because mercury may be released. If
lamps are not
recycled,
a hazardous waste profile must be performed in order to
determine
proper disposal method.
9. Receipts
of all waste and/or wastewater disposal must be
maintained
on site and be made available for inspection by DERM.
All
industrial and hazardous waste manifests must be kept on site
for
a minimum of three (3) years.
A list
of DERM permitted waste haulers is available upon request.
10. Special
attention should be paid to storm drain
locations (also
known
as storm sewer). Storm drains are
designed to help
alleviate
rainwater build up. These drains are
not connected to
the
sanitary sewer system but rather assist in allowing rainwater
to
drain into the ground and groundwater.
Therefore, industrial
discharges
should not be allowed to drain into these storm drains.
Areas
nearby storm drains must be kept free of oil, grease and
other
contaminants so that rainwater does not wash these materials
into
the storm drains.
11. All
facilities must operate with no discharge of oil, solvent
contaminated
wastewater or runoff, or other hazardous or
industrial
material onto the ground, soakage pits,
storm drains
or
septic tanks. Any discharge into
sanitary sewers must meet
sewer
standards.
12. Storage
a. For
facilities storing large amounts of chemicals and/or
fuels:
1. All
chemical and fuel storage must have secondary
containment. This containment area should be able to
hold 110% of the volume of the largest single tank to be
stored in this area.
2. Chemical
storage areas must be on an impervious surface
with secondary
containment or a bermed and covered area
away from drainage structures (e.g. floor drains or
storm drains).
Pollution
Prevention Suggestions
1. Waste
fluids should be segregated and kept separately. This
prevents
mixing incompatible substances and prevents contamination
of
a non-hazardous waste by a hazardous waste.
This also allows
them
each to be recycled or disposed of appropriately and reduces
disposal
costs.
2. Recycling
of waste fluids is a preferred option.
This can either
be
done on-site or shipped to an approved recycler off-site.
Units
for filtering, adding the necessary additives and restoring
coolant
are available. (Installation of such
units must be
approved
by DERM and the Fire Dept.)
3. For
small to medium facilities, it may be more economical to have
a
parts washer contractor replenish the parts cleaner and remove
the
spent solution, than to install a solvent recycling still.
4. For
large facilities, on-site solvent recycling stills are usually
very
economical with payback periods of only 2-3 years.
5. Alternative
cleaners are available (e.g. special water based
cleaners)
that replace traditional solvent. These
can be used in
a
variety of system including dip tanks, power washers with jet
sprays,
or ultrasonic immersion tanks.
6. Parts cleaning can be done in 3 stages
1. Preclean to remove heavier dirt (e.g. with a wire brush)
2.
Sink #1 as an initial sink to do
heavier cleaning. Recycled
only after full use.
3.
Sink #2 as a final sink for
precision cleaning (used as make-up
for sink #1).
7. Parts
can be removed slowly from solvent sinks and allowed to sit
a
few minutes on "drip racks" which drain back to the sink.
Rollaway
covers that are kept closed when not in use can be used
on the sink. Sludges should be removed often and
properly
disposed,
but the solution itself can be used many times.
8. Stop
leaks quickly. Drip pans can be placed
to catch leaks. Spot
mopping
with a bucket (and proper disposal of the water) can be
performed. Floor cleaning machines are available that
will spray
a
cleaning solution, scrub with brushed, and vacuum up the
solution
(to be disposed of properly). Absorbent
pads are
available that allow
the oil to be "squeezed out" into a waste oil
drum. The pads can be reused several times.
9. Scrap
parts can be sold to metal recyclers.
Questions
will be answered by the Industrial Facilities Section staff
at
(305)372-6600.
Any
questions concerning pollution prevention please call the Pollution
Prevention
Program at (305)372-6784.