Module 5 Flashcards
Airport operators need to pay attention to their wide range of fluid discharges. These particularly includes:
de-icing fluids, handling fuels, stormwater runoffs
melt existing and inhibit the further formation of snow and ice
antiicing/de-icing fluids (ADF)
can pollute groundwater
de-icing fluid
has been the cause of multiple accidents
accumulated snow and ice
can severely damage the environment, particularly groundwater and wildlife
leaks and spills
these chemicals used on the airport property can also have major adverse environmental impacts if leaks and spills occur
aircraft servicing and maintenance fluids, firefighting fluids, pesticides and herbicides
The large quantities of water can create ______ that can cause runway or taxiway closures if the airport drainage system is not designed properly.
flash floods
It is the act of reducing the severity of an impact.
mitigation
What does EPA stand for?
Environment Protection Agency
What does the EPA do?
- reduction of the amounts used
- collection and disposal of fluids
- recycling
Centralized De-icing Facilities
Denver/International, Montreal/Trudeau, Toronto/Pearson
Big reduce to ADFs, but demands very high power
Infrared Heaters
De-Icing na mga bagay
special vehicles, settling pools, infrared heaters
solutions for fuel and other chemical leaks and spills
reliable fuel storage, distributed fuel system, effective cleanup procedures, secondary containment, zoned leak detection systems
protection against accidental spills or deliberate sabotage
secondary containment
built around the tanks to contain massive spills
berms
used to identify volumetric changes of the product
zoned leak detection systems
solution for stormwater runoffs
drainage system
permit to allow discharge on surface water
Discharge Permit (US)
permit required by the National Pollution Discharge Elimination System (NPDES)
Discharge Permit (US)
grabs monthly sample to be tested against allowable EPA limits
National Pollution Discharge Elimination System (NPDES)
What does NPDES stand for?
National Pollution Discharge Elimination System
Water treatment methods depend on the ______
characteristics of raw water
depends on the characteristics of raw water
water treatment (methods)
serve multiple purposes, including drinking water, industrial use, and firefighting
public water systems
The treatment method is primarily determined by the need to produce ______ for human consumption.
potable water
It is a crucial step in conventional water treatment
rapid mixing
it’s all about getting chemicals and raw water to know each other very quickly
rapid mixing
the water is gently mixed to allow the clumps to grow larger and heavier
flocculation
also called sedimentation
settling
it is a natural process used in water treatment
settling or sedimentation
it’s like letting dirt settle out of a glass of muddy water
settling or sedimentation
it is a physical process used in water treatment to remove particles suspended in water
filtration
a process widely used in water treatment to disinfect water
chlorination
is a large tank that stores treated water
clear well
are a key part of delivering clean water after it’s treated at a water treatment plant
pumping stations
process of neutralizing or manipulating the electrostatic charges of the particles suspended in the water
coagulation
characteristics of silt particles
small size, colloidal nature, negative charges
when suspended in water, they are hard to eliminate since they are incapable of clumping together to create larger particles that could be more easily cleared out
silt particles
is negatively charged and attracts positively charged ions
solid particle
What do negative ions form given that they are so strongly attracted that they are virtually attached to the particle and travel with it?
slippage or slipping plane