Air ,Solid, Toxic, Hazardous, and Environmental Management Environmental Finals Flashcards

1
Q

Of all the Earth’s natural resources, it is the most shared.

A

Air

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2
Q

moves throughout the atmosphere, connecting sources of pollution to
points of impact, often far apart.

A

Air

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3
Q

Three other features of air make it an unusually challenging resources to deal
with:

Air has traditionally not been viewed as a resource like water or land
resources, so there are no private or public claims on it.
Air does not obey geopolitical boundaries, so transboundary air pollution
problems are common and especially difficult to resolve.
Polluted ambient air cannot be remediated with technology.

A

Air

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4
Q

Earth’s atmosphere is about

A

100 miles deep.

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5
Q

Earth’s atmosphere is about 100 miles deep. It is mainly composed
mostly of

A

Nitrogen (78.1%), Oxygen (20.9%), and Argon (0.93%)

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6
Q

For comparison, carbon dioxide now makes up over——-of the
atmosphere.

A

0.039%

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7
Q

cause the release of many different
compounds into the air at concentrations that are high enough to
cause adverse impacts on human health, crops and other vegetation,
building materials, climate, and even habitants of aquatic
ecosystems.

A

anthropogenic activities

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8
Q

determine how air contaminants are
dispersed and move through the troposphere.

A

Weather patterns

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9
Q

Air pollution problem involves three parts:

A

the pollution source

  1. the movement or dispersion of the
    pollutant
  2. the recipient
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10
Q

Along with gas, the air we breathe is filled with suspended
solids and liquids called—–that come from a variety of
sources.

A

aerosols

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11
Q

circulate the same way the air in the troposphere
circulates.

A

Pollutants

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12
Q

caused by solar radiation and the irregular
shape of the earth and its surface, which causes unequal
absorption of heat by the earth’s surface and atmosphere.

A

Air movement

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13
Q

the——of the earth’s atmosphere also
yields differences in barometric pressure.

A

dynamic thermal system

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14
Q

involves both control of air pollution
sources and

A

Air quality management

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15
Q

is associated with both hot and cold weather
fronts.

A

Low-pressure systems

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16
Q

Air movement around low-pressure fronts in the Northern Hemisphere

A

counterclockwise

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17
Q

Air movement around low-pressure fronts in the Northern Hemisphere is
counterclockwise and vertical winds are——where condensation
and precipitation take place.

A

upward,

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18
Q

affected by the rotation of the rotation of earth of its axis

A

global air circulation

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19
Q

located
in the top right corner
of each data map
shows the general
wind direction and
speed for each
sampling period.

A

wind rose

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20
Q

❖The circular format of the wind rose shows the direction the winds blew from and the
length of each—–around the circle shows how often the wind blew from that
direction.

A

“spoke”

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21
Q

impacts from air pollution include increased
mortality rates, increased health care costs, decreased productivity,
and decreased quality of life.

A

Primary public health

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22
Q

has several defenses against air pollution

particularly large particles. When someone is breathing particle-
contaminated air, the human respiratory system works a bit like a

sieve, preferentially removing certain size fractions at various
stages.

A

respiratory system

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23
Q

is a nonuniform combination of different
compounds.

A

Particulate matter (PM)

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24
Q

All particles 10 μm and less in diameter are denoted
as

A

PM10..

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25
All particles 2.5 μm and less in diameter are denoted as
PM2.5.
26
can travel deeper into the respiratory system.
smaller particles
27
are trapped in the upper respiratory system, producing a clogged nose and scratchy throat.
Larger particles
28
(those with diameter less than 0.1 μm) may actually pass with air through the alveoli and incorporated into the bloodstream and may affect many organs.
Ultra fine particles
29
defenses is to mobilize white blood cells to metabolize foreign objects.
cardiovascular system’s
30
Accounting for all other risk variables, it has been observed that ------------ in air results in more heart attacks. The connection may be the ultra fine particles.
increased PM
31
low-level burning of the respiratory surface tissues results in several adverse outcomes, from breathing difficulty to respiratory failure. Ozone is one pollutant that causes considerable irritation.
Irritation
32
arises from the introduction of pollutants into the cell. Ultrafine particles contribute to these diseases.
Cell Damage
33
pollutants can trigger a release of histamines to fight the invader, resulting in breathing difficulty and irritation of sensitive issues (e.g. skin, eyes). Pollens cause these effects.
Allergies
34
pollutants permanently scar the tissues of the respiratory system, resulting in increased breathing difficulty and often death. Asbestos is a pollutant that causes this disease.
Fibrosis
35
pollutants can trigger abnormal, malignant tissue growth that leads to cancer. Many hazardous air pollutants are cancer-causing.
Oncogenesis
36
*In the context of engineering analyses of air quality, two (2) distinct systems are of interest:
➡ the outdoor environment (ambient air) ➡ indoor environment
37
➡The two layers closest to Earth’s surface are our primary interest:
the troposphere and the stratosphere.
38
(tropos being Latin for mixed) the air layer closest to the surface and extending some 10 to 15 km in altitude.
troposphere
39
(stratos is Latin for layered or stratified) it is above the troposphere from about 15 to 50 km in altitude is a layer with very little mixing.
stratosphere.
40
is where pollution from human and natural activities is first emitted.
troposphere
41
has less overhead atmosphere, so it has more intense radiation than the troposphere. This radiation, much of it ultraviolet, creates photochemical reactions such as the conversion of molecular oxygen (O2) into ozone (O3).
stratosphere
42
oxygen
02
43
ozone
03
44
* In the stratosphere, as elevation--------------, its gets warmer because ozone gases in the upper layer absorb intense ultraviolet radiation from the sun.
increases
45
It acts as a shield for life on Earth.
ozone layer
46
is only about three molecules for every 10million molecules in the air. But it does a very important job.
ozone
47
it is like a----------the ozone layer absorbs bits of radiation hitting Earth from the sun. Even though we need some of the sun’s radiation to live, too much of it can damage living things.
sponge,
48
absorbs bits of radiation hitting Earth from the sun. Even though we need some of the sun’s radiation to live, too much of it can damage living things.
ozone layer
49
Operating at a regional scale are the regional transport processes and appears on daily weather forecasts:
➡high-pressure system ➡low-pressure systems
50
Both are created from the interaction of ------------masses near the surface.
cold and warm air
51
are created when air that is warmed by surface heating begins to rise.
Low-pressure systems
52
are typically created when air is descending to the ground. The pressure systems thus have unique vertical transport tendencies — upward for low pressure, downward for high pressure.
High-pressure systems
53
upward
low pressure,
54
downward
high pressure.
55
Much of the human population resides
along the coast.
56
In fact, 21 of the world’s ------------ are located in coastal areas, and the average population density in coastal areas is twice the global average.
33 megacities
57
Coastal locations are prone to additional transport pattens created by the ------------- and the resulting temperature differences that develop due to the differential heating that occurs.
land-sea interface
58
can build as the air slowly moves inland.
Pollutant concentrations
59
this situation exists when the atmospheric temperature changes more dramatically with altitude than the temperature of the air parcel that contains the pollutant (s).
Stable
60
this situation exists when the atmospheric temperature changes less dramatically with altitude than the temperature of the air parcel that contains the pollutant (s).
Unstable
61
the atmosphere exerts no force on pollutant emissions that move vertically. This situation occurs when the temperature changes for atmosphere and the air parcel containing the pollutant (s) are nearly identical.
Neutral
62
General Stability Conditions Encountered in the Atmosphere:
stable, unstable, neutral
63
The US federal government, through the Environmental Protection Agency (EPA), has identified six pollutants of special concern:
1. ozone-03 2. particulate matter-PM 3. sulfur dioxide-S02 4. nitrogen dioxide-N02 5. carbon monoxide-CO 6. lead-Pb
64
Fuel combustion from vehicles and engines. Reduces the amount of oxygen reaching the body's organs and tissues; aggravates heart disease, resulting in chest pain and other symptoms.
Carbon Monoxide (CO
65
Secondary pollutant formed by chemical reaction of volatile organic compounds (VOCs) and NOx in the presence of sunlight. Decreases lung function and causes respiratory symptoms, such as coughing and shortness of breath, and also makes asthma and other lung diseases get worse. More on Ground Level Ozone Here
Ground-level Ozone (03)
66
Smelters (metal refineries) and other metal industries; combustion of leaded gasoline in piston engine aircraft; waste incinerators (waste burners), and battery manufacturing. Damages the developing nervous system, resulting in IQ loss and impacts on learning, memory, and behavior in children. Cardiovascular and renal effects in adults and early effects related to anemia.
Lead (Pb)
67
Fuel combustion (electric utilities, big industrial boilers, vehicles) and wood burning. Worsens lung diseases leading to respiratory symptoms, increased susceptibility to respiratory infection
Nitrogen Dioxide (NO2)
68
this is formed through chemical reactions, fuel combustion (e.g., burning coal, wood, diesel), industrial processes, farming (plowing, field burning), and unpaved roads or during road constructions. Short-term exposures can worsen heart or lung diseases and cause respiratory problems. Long-term exposures can cause heart or lung disease and sometimes premature deaths.
Particulate Matter (PM)
69
SO2 comes from fuel combustion (especially high-sulfur coal); electric utilities and industrial processes as well as natural occurrences like volcanoes. Aggravates asthma and makes breathing difficult. It also contributes to particle formation with associated health effects.
Sulfur Dioxide (SO2)
70
are the amount of pollutant a source puts into the air, usually over a fixed amount of time; hence, emission rates are expressed as mass per time.
Emissions
71
expressed as mass per time.
emission rates
72
depend on the source, pollutant, and problem of interest, but common units are g/s, kg/day, and tonnes/yr. In a few places, tons/day and lb/ hr might still be used.
Typical emission rate units
73
can be highly variable
- Emission rates .
74
6 classifications of air emissions
1. Specific pollutant 2. Type of source 3. Natural processes 4. Permitted Emissions 5. Fugitive emissions 6. Accidental emissions
75
impacts usually specific to a particular pollutant, as are emission reduction strategies. The criteria pollutants receive the most attention.
1. Specific pollutant
76
One critical classification is whether the source is stationary sources, mobile sources, or point sources.
2. Type of source
77
in some areas, natural emissions may dominate the total for certain pollutants, and in these cases, there will be little impact from engineered emission-control strategies.
3. Natural processes s
78
- are those granted by an agreement with the state air resource regulatory agency. Another important emission classification scheme, particularly to industry, is whether an emission is permitted, fugitive, or accidental.
4. Permitted Emissions
79
pollutant releases from an unconfined source. These sources are often area sources and outdoors.
5. Fugitive emissions
80
release due to accidents or poor operation and maintenance of equipment. Most of these emissions are best controlled by diligent maintenance of equipment, including ducts, valves, and storage vessels.
6. Accidental emission
81
Four methods are used to quantify the magnitude of air pollutant emissions:
1.Direct measurements 2.The mass balance approach 3.Process modeling 4.Emission factor modeling
82
this poses several unique challenges, and the sampling occurs in the stack discharge airstream.
1.Direct measurements
83
it can be used to indirectly determine the emission rate from some sources.
2.The mass balance approach
84
this attempt to describe emissions as mathematical functions of relevant process information.3.Process modeling 4.Emission factor modeling
3.Process modeling
85
it relates the air pollution released by a source activity to the magnitude of that activity. The proportionality between emissions and activity is called an emission factor.
4.Emission factor modeling
86
The proportionality between emissions and activity is called an
emission factor.
87
* Limiting emissions into the air is both technically .
difficult and expensive
88
are the only air cleaning mechanisms available, and neither is very efficient, good air quality depends on pollution prevention and on limiting what goes into the air.
rain and deposition
89
may be realized in a number of ways.
control of air emissions
90
There are five (5) options to control air pollution:
1. Prevention 2. Regulatory solutions 3. Market-based solutions 4. Voluntary solutions 5. Emission-control technologies
91
There are five (5) separate possibilities for control of air emissions:
1. Source correction 2. Collection of Pollutants 3. Cooling 4. Treatment 5. Dispersion
92
Changing or eliminating a process that produces a polluting air effluent is often easier than trying to trap effluent.t.
Source correction
93
* Processes may also be modified in order to reduce air pollution.
Source correction
94
mandates the use of oxygenated fuels in urban areas in order to limit CO emissions from automobiles.
The 1990 Clean Air Act
95
Such measures as process change, raw material substitution, and equipment modification to meet emission standards are known as
controls.
96
is the term used for all devices and methods for decreasing the quantity of pollutant reaching the atmosphere, once it has been generated by the source.
Abatement
97
is often the most serious problem in air pollution control.
Collection of pollutants for treatment
98
is a notorious polluter mainly because the effluent (exhaust) is so difficult to trap and treat.
Automobile exhaust
99
is one means of control. Many stationary industries recycle exhaust gases, usually CO and volatile organic compounds, as for the process.
Recycling of exhaust gases
100
* The exhaust gases to be treated are sometimes too hot for the control equipment, and must be cooled.
cooling
101
may also drop the temperature below condensation point of some pollutants, so they may be collected as liquids.
cooling
102
are all acceptable cooling methods.
Dilution quenching, heat exchange
103
are probably the most widely used cooling method and are especially appropriate where heat can be conserved.
Cooling coils
104
requires matching the characteristics of the pollutant with features of the control device.
Selection of the treatment device
105
vary in size over many orders of magnitude, from ideal gas molecules to macroscopic particles several millimeters in diameter.
Pollutant particles
106
The various air pollution control devices are conveniently divided into those that control particulate matter and those that control gaseous pollutants. Some of this are the following:
Cyclones Fabric Filters Wet Collectors/Scrubbers Electrostatic Precipitators HEPA Filters
107
is a popular, economical, and effective means of controlling particulates. They alone are generally not adequate to meet stringent air pollution control regulations, but serve as pre cleaners for control devices like fabric filters or electrostatic precipitators.
Cyclones
108
are used for controlling particulate matter operate like a vacuum cleaner. Dirty gas is blown or sucked thorough fabric filter bag.
Fabric Filters
109
the spray tower or scrubber can remove larger particles effectively. More efficient s c r u b b e r s p r o m o t e t h e contract between air and water by violent action in a narrow throat section into which the water is introduced.
Wet Collectors/Scrubbers
110
are widely used to trap fine particulate matter in applications where a large amount of gas needs treatment and where use of a wet scrubber is not appropriate. Coal-burning electric generating plants, primary and secondary smelters, and incinerators often used this.
Electrostatic Precipitators
111
very hazardous or toxic particulate matter of diameter less than 1 μm must sometimes be controlled to better than 99.9%. A single stage of High Efficiency Particulate Attenuation (HEPA) micropore or glass frit filters, through which the pre cleaned gas is forced or sucked by vacuum, can achieve this level of control, and four to six HEPA filter stages in series can achieve 99.9999% control. HEPA filters are used to control emission of radioactive particles.
HEPA Filters
112
(HEPA)
High Efficiency Particulate Attenuation
113
is the process by which contaminants move through the air and a plume spreads over a large area, thus reducing the concentration of the pollutants it contains.
Dispersion
114
The plumes spreads both
horizontally and vertically.
115
spreads both horizontally and vertically.
The plumes
116
The most commonly used model for the dispersion of gaseous air pollutants
Gaussian model developed by Pasquill,
117
in which gases dispersed in the atmosphere are assumed to exhibit ideal gas behavior.
Gaussian model developed by Pasquill,
118
Many atmospheric factors influence the way air pollution is
dispersed,
119
* Many atmospheric factors influence the way air pollution is dispersed, including
wind direction and wind speed, type of terrain and heating effects.
120
To better understand how atmosphere processes can affect ground level pollution, can be------------------- described simply as either stable or unstable, where the stability is determined by wind (which stirs the air) and heating effects (which cause convection currents).
atmospheric conditions
121
is determined by wind (which stirs the air)
stability
122
is determine by which cause convection currents
heating effects
123
The processes by which the atmosphere cleans itself do exist, and includes the effect of gravity, contact with the earth’s surface, and removal by precipitation.
DISPERSION
124
particles in the air, if they are larger than about a millimeter in diameter, are observed to settle out under the influence of gravity.
➡ Effect of Gravity
125
many atmospheric gases are absorbed by the features of the earth’s surface, including stone, soil, vegetation, bodies of water and other materials. Soluble gases like SO2 dissolve readily in surface waters.
Surface Sink absorption
126
it removes contaminants from the air by two methods.
Precipitation
127
is an “in-cloud” process in which very small pollutant particles become nuclei for the formation of rain droplets that grow and eventually fall as precipitation.
*Rainout
128
is a “below-cloud” process in which rain falls through the pollutant particles and molecules, which are entrained by the impinging rain droplets or which actually dissolve in the rainwater.
*Washout
129
is transferred from the earth’s surface by radiation, conduction, and convection.
* Heat
130
masses heat and cool faster than water
land
131
is measured as wind velocity.
* Horizontal wind motion
132
are plotted as a wind rose, a graphic picture of wind velocities and the direction from which the wind came.
Wind velocity data
133
As a parcel of air in the earth’s atmosphere rises through the atmosphere, it experiences decreasing pressure and thus expands.
VERTICAL DISPERSION OF POLLUTANTS
134
The rate at which dry air cools as it rises is called
dry adiabatic lapse rate
135
is independent of the ambient air temperature.
dry adiabatic lapse rate
136
These includes paper and plastic generated at home, ash produced by industry, cafeteria food wastes, leaves and cut grass from parks, hospital medical wastes, and d e m o l i t i o n d e b r i s f r o m a construction site.
๏Solid wastes
137
These materials are considered a -------- when owners and society believe they no longer have value.
waste
138
varies g reatly between cultures and countries and has evolve over time.
Solid-waste management
139
differ from liquid or gaseous wastes because they cannot be pumped or flow like fluids.
๏Solid wastes
140
can be placed into solids forms (including soils) and thus can be contained more easily.
๏Solid wastes
141
Proper management of solid wastes has four main objectives:
1.Protect public health 2.Protect the environment (including diversity) 3.Address social concerns (equity, environmental justice, aesthetics, risk, public preferences, recycling, renewable energy) 4.Minimize cost
142
*Preindustrial communities arranged to have solid waste collected and disposed of in central locations termed
middens.
143
when it increased, solid waste became more of a problem. Some wastes were left in streets and alleys, feeding dogs, pigs, and rats.
population, urbanization, and consumption
144
*During the 1900s, increased industrialization resulted in the production of different wastes —
more hazardous solid wastes.
145
*Non recovered solid wastes were placed into engineered facilities
engineered or sanitary landfills.
146
In the past twenty years, there has been an increased emphasis on-----------as part of the pollution prevention.
reduction, reuse and recycling ( the three Rs)
147
Solid wastes other than hazardous and radioactive materials are considered as------------and consist of all the solid and semisolid materials discharged by the community.
municipal solid waste (MSW)
148
The solid wastes jointly managed by a municipality are
municipal solid waste (MSW)
149
The fraction of MSW produced in domestic households is called
refuse.
150
The components of refuse are:
garbage or food wastes rubbish - including glass, tin cans, and paper trash - including larger items like limbs, old appliances, and pallets that are usually deposited in garbage cans
151
depends on both the characteristics of the site and the characteristics of the MSW itself.
Refuse management
152
The following are characteristic of MSW:
1)Gross composition 2)Moisture content 3)Particle size 4)Chemical composition 5)Density
153
it can be the most important characteristic affecting MSW disposal, or the recovery of materials and energy from refuse.
Gross composition
154
is expressed either “as generated” or “as disposed”, since moisture transfer takes place during disposal process.
Refuse composition
155
of MSW may vary between 15 and 30%, and is usually about 20%.
2.Moisture content
156
is particularly important in refuse processing for resource recovery.
3.Particle size distribution
157
the use of both proximate and ultimate analysis in the combustion of MSW and its various fractions
4.Chemical composition
158
Wastes that spreads disease are termed
putrescible wastes.
159
They can spread disease----------- (as in the case of dirty diapers),
directly
160
or----------- by providing a food source for disease vectors such as insects (flies) or animals (rats, dogs, birds).
indirectly
161
Some solid wastes (Ex. mining wastes and most agricultural and industrial wastes) are managed by the
waste generator.
162
Smaller sources are usually managed jointly under
one integrated system.
163
Sources of Solid Waste that Makes Up MSW:
Residential Commercial Institutional Construction and Demolition Municipal services Industrial Agricultural Mining
164
Main sources of waste according to a research entitled “Recycling of Organic Wastes for Biomass Energy Production in Green Buildings”, Dec. 2016
industrial irrigation domestic/residential public supplied industrial, commercial mining
165
Sources of Solid Wastes that Makes Up MSW:
➡Residential ➡Commercial ➡Institutional ➡Construction and Demolition ➡Municipal services ➡Industrial ➡ Agricultural ➡Mining
166
are some of the major source of solid waste. Garbage from these places include food wastes, plastics, paper, glass, leather, cardboard, metals, yard wastes, ashes and special wastes like bulky household items like electronics, tires, batteries, old mattresses and used oil.
➡Residential and homes where people live
167
commercial buildings and facilities refer to hotels, markets, restaurants, go downs, stores and office buildings. Some of the solid wastes generated from these places include plastics, food wastes, metals, paper, glass, wood, cardboard materials, special wastes and other hazardous waste
➡Commercial buildings and facilities
168
these schools, colleges, prisons, military barracks and other government centered that also produce solid waste. Some of the common solid wastes obtained from these places include glass, rubber waste, plastics, food wastes, wood, paper, metals, cardboard materials, electronics as well as various hazardous wastes.
➡Institutional
169
these sites include new construction sites for buildings and roads, road repair sites, building renovation sites and building demolition sites. Some of the solid wastes produces in these places include steel materials, concrete, wood, plastics, rubber, copper wires, dirt and glass.
➡Construction and Demolition
170
the urban centers also contribute immensely to the solid waste crisis in most countries today. Some of the solid waste brought about by the municipal services includes street cleaning, wastes from parks and beaches, wastewater treatment plants, landscaping wastes and wastes from recreational areas including sludge.
➡Municipal services
171
they are known to be one of the biggest contributors of solid waste. They include light and heavy manufacturing industries, construction sites, fabrication plants, canning plants, power and chemical plants. These industries produce solid wastes in form of housekeeping wastes, food wastes, packaging wastes, ashes, construction and demolition materials, special wastes, medical wastes as well as hazardous wastes.
➡Industrial
172
crop farms, orchards, dairies, vineyards and feedlots are also sources of solid wastes. Among the wastes they produce include agricultural wastes, spoiled food, pesticide containers and other hazardous materials.
➡ Agricultural
173
from coal mining, uranium metal mining, oil/gas exploration. Some of the solid wastes produced are vast amounts of solid waste needing specialized management.
➡Mining
174
The quantities of MSW generated in a community may be estimated by one of three techniques:
1. Input analysis 2. Secondary data analysis - 3. Output analysis -
175
- estimates MSW based on use of a number of products.
1. Input analysis
176
may be used to estimate solid waste production by some empirical relationship.
2. Secondary data analysis -
177
should be measured by weighing the refuse dumped at the disposal site, either with truck scales or with portable wheeled scales.
3. Output analysis -
178
The amount of generated MSW can vary within a year , b e t w e e n u r b a n a n d r u r a l a r e a s , geographically, with income, and among countries.
Quantities of Municipal Solid Waste
179
One key is to understand the differences between
generation rates and discard rates (the difference being the part of the waste stream that is reused or recycled).
180
Wastes are considered ---------- when they pose a direct threat to human health or the environment.
hazardous waste
181
Waste can be classified as hazardous by one of six characteristics:
1) Ignitable 2) Corrosive 3) Reactive 4) Toxic 5) Radioactive 6) Infectious
182
-Can the waste create a fire (e.g., waste solvent)?
Ignitable
183
-Is the waste very acidic or basic and so able to corrode storage containers (e.g., battery acids)?
2) Corrosive
184
-Can the waste participate in rapid chemical reactions leading to explosions, toxic fumes, or excessive heat (e.g., lithium that can react with water explosively,
3) Reactive
185
-Can the waste cause internal damage to a person or organism (e.g., poisons causing death or blindness, carcinogens)?
4) Toxic
186
-Can the waste release subatomic particles that can cause toxic effects (e.g., some medical and laboratory wastes, wastes associated with nuclear energy production)?
5) Radioactive
187
-Can the waste lead to the transmission of disease (e.g., used syringes, hospital medical wastes)?
6) Infectious
188
Formaldehyde Toxic in nature; carcinogen; irritates eyes, nose,throat and skin; nervous, digestive, respiratory system
Air fresheners & deodorizers
189
Sodium hypochlorite Corrosive; irritates and burns skin and eyes; nervous, respiratory, digestive system damage
Bleach
190
Sodium hypochlorite Corrosive; irritates and burns skin and eyes; nervous, respiratory, digestive system damage Sodium hypochlorite Corrosive; irritates and burns skin and eyes; nervous, respiratory, digestive system damage Phenols Ignitable; very toxic in nature; respiratory and circulatory system damage Ammonia Toxic in nature; vapor irritates skin, eyes and respiratory tract
Disinfectants
191
harmful ingredients: potential hazards:
192
harmful ingredients: potential hazards:
193
Sodium/potassium hydroxide (lye) Corrosive; burns skin and eyes; toxic in nature; nervous, digestive and urinary system damage
Drain cleaner
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Carbaryl Very toxic in nature; irritates skin; causes nervous, respiratory and circulatory system damage Dichlorophene Toxic in nature; irritates skin; causes nervous and digestive system damage Chlordane and other chlorinated hydrocarbons Toxic in nature; irritates eyes and skin; cause respiratory, digestive and urinary system damage
Flea powder
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Diethylene glycol Toxic in nature; causes nervous, digestive and urinary system damage Petroleum solvents Highly ignitable; carcinogenic; irritate skin, eyes, throat, nose and lungs Ammonia Toxic in nature; vapor irritates skin, eyes and respiratory tract
Floor cleaner/wax
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Petroleum distillates or mineral spirits Highly ignitable; toxic in nature; carcinogen; irritate skin, eyes, nose, throat and lungs
Furniture polish
197
Sodium/potassium hydroxide (lye) Corrosive; burns skin, eyes; toxic in nature; causes nervous and digestive system damage
Oven cleaner
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Chlorinated aliphatic hydrocarbons Toxic in nature; cause digestive and urinary system damage Esters Toxic in nature; irritate eyes, nose and throat Alcohols Ignitable; cause nervous system damage; irritate eyes, nose and throat Chlorinated aromatic hydrocarbons Ignitable; toxic in nature; digestive system damage Ketones Ignitable; toxic in nature; respiratory system damage
Paint thinner
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Aromatic hydrocarbon thinners Ignitable; toxic in nature; carcinogenic; irritates skin, eyes, nose and throat; respiratory system damage Mineral spirits Highly ignitable; toxic in nature; irritates skin, eyes, nose and throat; respiratory system damage
Paints
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Calcium hypochlorite Corrosive; irritates skin, eyes, and throat; if ingested cause severe burns to the digestive tract Ethylene (algaecides) m acid sulfate or oxalate or hypochloric acid
Pool sanitizers
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Sodium acid sulfate or oxalate or hypochloric acid Corrosive; toxic in nature; burns skin; causes digestive and respiratory system damage Chlorinated phenols Ignitable; very toxic in nature; cause respiratory and circulatory system damage
Toilet bowl cleaner
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Diethylene glycol Toxic in nature; cause nervous, urinary and digestive system damage Ammonia Toxic in nature; vapor irritates skin, eyes and respiratory tract
Window cleaners
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Solid-waste system comprises of:
(1) waste generation (2)storage (3)collection and transport (4)processing and disposal
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of municipal solid waste typically accounts for 40% to 80% of the total cost of solid-waste management.
Storage, collection, and transport
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Three questions need be considered when designing a storage, collection, and transport system:
1.Which wastes should be collected from the generator, and which should the generator transport to a processing facility? 2.To what extent should the generators be asked to separate collected waste into different fractions? 3.Should waste be transported directly to a treatment/disposal facility, or should collection vehicles transfer wastes into a more efficient vehicle first?
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is needed whether a separate vehicle should be used for newspapers or whether existing collection for recycled goods or general waste could be used. ๏ Common options available for the interrelated problems of storage, collection, and transport can be used to devise creative and sustainable solutions. ๏ There are specific vehicles and a container are used for collection, storage, and transport of specific components of municipal solid waste.
An assessment
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is an expensive part of of waste management, and many new devices and methods have been proposed in order to cut costs. ๏In the US, and in most other industrialized countries, solid waste is collected by trucks. ๏Collections are facilitated by the use of containers that are emptied into the truck with a mechanical or hydraulic mechanism.
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either are emptied into the truck or are carried by truck to the disposal site.
C o m m e r c i a l a n d i n d u s t r i a l c o n t a i n e r s , “dumpsters”,
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reduce the amount of garbage in refuse. Garbage grinders are so ubiquitous that in most communities garbage collection is needed only once a week.
Garbage grinders
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it have been installed in some small communities, mostly in Sweden and Japan. The refuse is ground at the residence and sucked through underground lines.
Pneumatic pipes
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can reduce collection and MSW disposal costs and thus reduce local taxes, but only if every household has one.
Kitchen garbage compactor
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are part of many urban refuse collection systems. A typical system includes several stations located at various points in a city, to which collection trucks bring the refuse. The drive to each transfer station is relatively short, so that workers spend more time collecting and less time traveling.
Transfer stations
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of ten provided by the community, are widely used for transfer of refuse from the household to the collection truck.
Cans on wheels
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may result in significant cost saving as well as increased effectiveness. Software is available for selecting least- cost routes and collection frequencies.
Route optimization
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of materials involves either the voluntary continued use of a product for a purpose for which it may be not have been originally intended. - In materials reuse the product does not return to the industrial sector, but remains within the public or consumer sector.
Reuse
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is the collection of a product by the public and the return of this material to the industrial sector. - This is very different from reuse, where the materials do not return for remanufacturing.
, Recycling,
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it differs from recycling in that the waste is collected as mixed refuse, and then t h e m a t e r i a l s a r e r e m o ve d b y v a r i o u s processing steps. - Recovery of materials is commonly conducted in a materials recover y f a c i l i t y ( M R F o r “murph”). PET bottles are separated from other plastics in a materials recovery facility.
Resource Recovery
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๏A wide variety of ----------- is available for separation of waste materials.
mechanical equipment
219
can separate ferrous metals, but only after any bags have been opened and the waste has been placed on conveyor.
๏Magnets
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๏Methods can involve screens, sieve-like inclined shaking tables, bursts of air, and rotating sieves called
trammels.
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is a microbial process that treats biodegradable wastes. The reactions are similar to those employed in aerobic wastewater treatment.
Composting
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The most common applications of composting are for:
1.Industrial/agricultural wastes 2.Source-operated MSW
223
ex. wood waste, fish-processing waste
1.Industrial/agricultural wastes
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ex. such as yard wastes separately collected or mixture of yard and food wastes separately collected.
2.Source-operated MSW
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is a trapezoidal pile of processed organic matter left in the open air.
➡Windrow
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is a system that maintains the processed organic matter in a large container.
➡In-vessel
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Composting has several objectives:
(1) to reduce the mass of waste to be managed (2) to reduce pollution potential (3) to destroy any pathogens (4) to produce a product that can be marketed or used by the local community
228
(also called waste-to-energy) is a combustion process where oxygen is used at high temperature to liberate the energy in waste.
incineration
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an reduce the amount of waste needing disposal, generate energy for a community, and also reduce MSW transportation costs.
incineration
230
are complex and requires advanced skills in construction and operation.
incineration systems
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Common Incineration Systems:
Mass-burn Modular Refuse-derived fuel (RDF) Co-incineration Hazardous waste Cement kilns
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Unsegregated municipal solid waste is combusted.
Mass-burn
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Small incinerators focus on treatment of specific waste streams (e.g., medical waste)
Modular
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Energy-rich waste streams can be separated from other wastes and burned, typically as a substitute for fossil fuels such as coal, in power plants. Wastewater treatment biosolids are one such waste stream.
Refuse-derived fuel (RDF)
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Specific postproduction commercial/industrial wastes, such as wood wastes from construction, can be combusted with production wastes, such as paper mill sludges or dried wastewater treatment plant biosolids to produce energy.
Co-incineration
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Hazardous organic wastes (e.g., solvents, pesticides) can be combusted to destroy the wastes, though this requires very close attention to air emissions.
Hazardous waste
237
Cement factories may provide suitable conditions of many wastes, including waste tires and waste oils, during the production of cement.
Cement kilns
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are engineered facilities designed and operate for the long-term containment of solid wastes. ๏Design of the landfill will vary greatly based on the waste and the location of the facility.
landfills
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where are the wastes are placed and compacted into solid forms, then covered to limit exposure to water and air.
In landfills
240
are technically advanced facilities with sophisticated environmental protection systems.
landfills
241
Environmental protection in landfills occurs through a combination of four barriers:
1. appropriate siting 2. engineered design that is carefully implemented during construction and operation 3. exclusion of inappropriate wastes 4. short- and long-term monitoring
242
is water that contacts the wastes and becomes a contaminated wastewater. ๏ As biological materials decompose in landfills, oxygen is consumed, and carbon dioxide is produced. Over time, an anaerobic environment evolves that leads to the production of methane gas.
Leachate
243
The first and foremost consideration in the prevention of environmental impact from landfill is
selection of an appropriate landfill site.
244
is rapidly becoming the most difficult stage of the process since few people wish to have landfills in their neighborhoods.
Siting of Landfill
245
Early sanitary landfills were often indistinguishable from dumps,thereby enhancing the-----------” image.
“bad neighbor
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Other considerations are the following in choosing a landfill:
1) Drainage 2) Wind 3) Distance from collection 4) Size 5) Rainfall patterns 6) Soil type 7) Depth of the water table 8) Treatment of leachate 9) Proximity to airports 10)Ultimate use
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Wastes that are disposed into a landfill undergo a series of interrelated chemical and biological reactions. These reactions deter mine the quantity and composition of t h e g a s a n d l e a c h a t e produced by the landfill, and t h u s d e t e r m i n e t h e management required.
Landfill Decomposition
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-The production of landfill gas is best viewed as both a problem and an opportunity.
Landfill Gas
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-Landfill gas is a problem for the following reasons:
1. It can be explosive when mixed with oxygen. 2. It can be a human health concern for site workers. 3. It can create odors. 4. It can displace oxygen in soils, which may suffocate nearby plants. 5. It can emit methane to the atmosphere, which contributes to greenhouse gas emissions.
250
No matter what controls are implemented to minimize the movement of water into a landfill, some water will enter and produce leachate. Control of leachate needs to consider the quantity and quality of the leachate, as well as its potential adverse effects.
Landfill Leachate
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Three different strategies are used to control the volume and strength of leachate:
1. Isolation - 2. Natural attenuation 3. Controlled biological degradation -
252
waste is isolated by limiting the entrance of water and thus the production of leachate.
1. Isolation -
253
- the natural physical, chemical, and microbiological properties of soil treat the leachate.
2. Natural attenuation
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landfill conditions are modified to optimize degradation. This option typically involves adding moisture and ensuring suitable mixing, ensuring that toxic chemicals are kept out of the waste, and maintaining proper pH, nutrients and monitoring.
3. Controlled biological degradation -
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design that must include methods for the recovery and treatment of the leachate produced by the decomposing refuse, and the venting or use of the landfill gas.
Landfill Design
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are designed facilities, much like water or wastewater treatment plants.
Modern landfills
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➡ The two principal design types are:
1. Area landfill 2. Valley fill landfill
258
Solid-Waste Energy Technologies
1. Anaerobic Digestion 2. Gasification - 3. Pyrolysis -
259
- is a biological process of converting separated biodegradable solid wastes into methane gas and a solid residue that is suitable for turning into compost.
1. Anaerobic Digestion
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is a process, similar to incineration, where less than stoichiometric amounts of oxygen are applied to the waste in the reaction vessel.2. Gasification - 3. Pyrolysis -
2. Gasification - 3. Pyrolysis -
261
is a similar process, where even less oxygen or no oxygen is applied to the reaction, leading to the production of high-energy gases and a solid residue (char) that can be separated to give a high-energy residue for later combustion.
3. Pyrolysis -
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Successful solid-waste management requires a
systems approach.
263
Separation of waste types by waste generators, known as,
source separation
264
is a key part of a good system.
source separation
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zero waste system
shifting subsidies design for the environment clean production distribution empowered consumer resource recovery centers producer responsibility jobs for the environment changing rules
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A successful solid-waste management requires the following:
1. focus on the overall objectives 2. creativity in developing new sustainable possibilities, which may include redefining the original problem 3. recognition of the impact that decisions on one part of the system can have on the functioning of the overall system
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‣Public concern about solid waste is high, as it is for many other engineering activities. ‣As a result, engineers today must discuss proposed projects and prog rams with the various stakeholders that make up the public — an effort that includes listening to the public’s concerns and ideas.
Consultation
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‣A first step in a process of consultation is the
identification of stakeholders who have a direct or indirect interest in the project.
269
Stakeholders can be:
➡the neighbor ➡the local community ➡the wider community ➡news media ➡elected officials ➡environmental and social interest groups ➡cultural groups
270
Consultation methods are:
➡Information releases ➡Field trips/ site visits ➡Information stands/ club visits ➡Contact person ➡Public meetings ➡Workshops ➡Advisory committees ➡Mediation
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-Inform the public of preferred behaviors. -Exchanges of commercial waste -Information is in individual’s best interest as well as helping waste management -Changing behavior will create difficulties for individuals.
Public information campaigns
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-Inform the public which consumer goods create fewer waste problems. -Reusable shopping bags; Eco labeled detergents -Consumers lack information on waste impacts of products. -differences between options are small or difficult to assess.
-Ecolabeling
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-Government or industry groups set future goals. -50% increase in paper recyclingg by 2020 -Society agrees on direction but lacks a focus. -Target does not consider costs, side effects, or risks.
-Waste Targets
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-Government supports recycling or waste minimization efforts. -Grants to community recycling efforts -Environmental effects of waste are not reflected by costs. -Grants awarded for activities that would happen in any case.
Government subsidies
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-Producers of waste rather than the government pay the full cost of management. -Weight-based charges for residential solid waste - Cost of charging system is small. -Users avoid charges by illegal practices
User pays
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- Violators of rules pay a fine. -Tickets for littering -Behavior is clearly negative, and few violators exist. -Many violators and each causes very small impact
Enforcement
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-Consumers receive refund as incentive for proper management of waste. -Deposit-refund for car batteries -High negative consequences of improper waste management. -Large costs to operate system, and few environmental benefits.
Deposit-refund
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-Government imposes taxes on waste. -Landfill tax -Taxes linked to environmental consequences of activities. -Large costs to operate system or undesirable side effects.
Waste taxes
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-Producers responsible to take back goods at end-of-use life stage. -Computer return systems -Goods can be reused easily in production of new products. -Large costs in collection, storage, and transport
Producer responsibility
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-Government prohibits goods or practices. -Ban of specific pesticides; ban of backyard burning -Goods/practices have high potential for harm, and other policy options are too costly. -Impacts are small or can be managed with other policies.
Ban of goods and practices
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๏Socially acceptable waste management facilities can be expensive, and equitable compromises between costs and social benefits are needed. ๏An underlying cause of difficulty is the economy of scale of most waste management facilities, which means that a facility twice as large does not cost twice as much. ๏Economy of scale means that larger landfills, incinerators, and compost plants are economically favored. ๏Sustainable development has shown that local solutions are often a preferred alternative.
Cost Estimation
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- includes many chemicals and materials, including poisonous or toxic chemicals, where improper use and disposal of these products can result in the production of hazardous waste that can pollute the environment
Hazardous substance
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comes from a variety of sources, both present and past activities. Years ago, before we understood the dangers of hazardous waste, there were no laws controlling its disposal.
Hazardous waste
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Many businesses and industries treated their hazardous waste the same as the rest of their trash —so it ended up in a---------
*landfill, *dumped in a river or lake, *buried in the ground.
285
were selected for convenience and placed with little or no attention to potential impacts on groundwater quality, runoff to streams and lakes, and skin contact as children played hide-and-seek in a forest of abandoned 55-gal drums.
Disposal sites
286
These production engineers solved disposal problems by simply pilling or dumping these waste products
“out-back”.
287
Attitudes in the United States began to change in the
1960s, 1970s, and 1980s.
288
are now no longer viewed as commodities to be polluted with the problems of cleanup freely passed to neighboring towns or future generations.
Air, water, and land
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was enacted to give the U.S. Environmental Protection Agency (EPA) specific authority to regulate the generation, transportation, and disposal of dangerous and hazardous materials.
1976, the Federal Resource Conservation and Recovery Act (RCRA)
290
a United States federal environmental remediation program created in 1980 to investigate and clean up hazardous waste sites nationwide administered by the Environmental Protection Agency
Superfund Program
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The federal government attempted to impose classification system under the implementation of RCRA, in which a hazardous waste is defined by
*the degree of ignitability, *corrosivity, *reactivity, *toxicity. includes acids, toxic chemicals, explosives, and other harmful or potentially harmful waste.
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are excluded, such wastes are obviously hazardous, but their generation, handling, processing, and disposal differ from chemically hazardous wastes.
Radioactive waste
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The process by which living organisms concentrate an element or compound in levels in excess of the surrounding environment.
Bioconcentration
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A calculated dose of a chemical substance that is expected to kill 50% of a population exposed through a route other than respiration (mg/kg of body weight).
LD50 (lethal dose 50)
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A calculated concentration of a chemical substance that, when following the respiratory route, will kill 50% of a population during a 4-h exposure period (ambient concentration in mg/L).
LD50
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The ability of a chemical substance to cause poisonous reactions in plants.
Phytotoxicity
297
All radioactive materials, as well as health protection from ionizing radiation, have been regulated by a separate and independent government agency:
the Atomic Energy Commission (AEC) from 1954 until 1974, and the Nuclear Regulatory Commission (NRC) since 1974.
298
of hazardous waste is generated by the chemical and allied products industry. The machinery, primary metals, paper, and glass products industries each generate between 3 and 10% of the nation’s total.
More than 60%
299
Most hazardous waste is generated and inadequately disposed of
in the eastern portion of the country.
300
A substance will be hazardous waste if it is:
1. Reactive 2. Corrosive 3. Flammable (ignitable) 4. Toxic
301
is only waste that when ingested or absorbed, is harmful or fatal to living organism.
❖A toxic waste
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may be sometimes toxic.
Hazardous waste
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will always be Hazardous waste.
❖A toxic waste
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examples of corrosive
-batteries -Drain cleaners -oven cleaners
305
examples of toxic
-pesticides -rat poison -pharmaceuticals -cleaning fluids
306
examples of reactive
-pool chemicals -ammonia -bleach -Aerosols
307
examples of flammable
-paints -solvents -oils -gasolines -bbq starter -propane cylinders
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➡capable bursting into flames and may give off harmful vapors ➡pose a fire hazard and irritate the skin, eyes, and lungs
1.Ignitable
309
➡Ignitable substances in these wastes may be:
- Liquids - Gases
310
➡They catch fire due to:
➡ Presence of ignition source (liquid) ➡ From friction or contact with water (nonliquids) e.g. ignitable gases; and oxidizers (organic peroxide)
311
➡capable of chemically wearing substances away (corroding) or destroying them ➡characteristic of substances that exhibit extremes of acidity or basicity or a tendency to corrode steel (e.g.,HCL etc.) ➡For example, most acids are corrosive. They can eat through metal, burn human skin on contact, and give off capers that burns the eyes ➡Acids found in batteries are corrosive
2. Corrosive
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➡Substances which are listed or its compounds are toxic. eg., Arsenic D004 ➡it can cause illness — ranging from severe headaches to dance — and even death if swallowed, and many are also absorbed through the skin ➡poisonous to people and other organisms ➡pesticides, weed killers, and many household cleaners are toxic
3. Toxicity
313
➡Substances that have a tendency to undergo violent chemical change (examples are explosives, pyrophoric materials, water-reactive substances, or cyanide- or sulfide- bearing wastes) ➡capable of exploding or releasing poisonous gas when mixed with another substance or chemical
4.Reactivity
314
are reactive, when they come in contact with each other they produce a poisonous gas
chlorine bleach and ammonia
315
results from industrial, chemical, and biological processes.
Toxic waste
316
Sources of hazardous waste are:
1. by products of industrial, domestic activities 2. mining sites and mineral 3. agricultural facilities and research laboratories 4. all sources that discharges liquid, solid and gas that fit the definition of hazardous waste can be regarded as hazardous waste 5. agricultural land and agro-industry 6.contaminated sites and building materials
317
➡Common hazardous waste include:
1. waste oil and fuel 2. solvents and thinners 3. toxic and flammable paint wastes 4. chlorinated solvent, heavy metals 5. perchlorate and peroxides 6. radioactive waste, etc.
318
EXAMPLES OF TOXIC AND HAZARDOUS WASTE
-car batteries -pesticide -light bulbs -used motor oil
319
HAZARDOUS WASTE HAVE FOUR (4) CATEGORIES:
1.Listed wastes - 2.Characteristic wastes - 3.Universal wastes - 4.Mixed wastes -
320
wastes that EPA has determined are hazardous. The lists include the F-list (wastes from common manufacturing and industrial processes), K-list (wastes from specific industries), and P- and U-lists (wastes from commercial chemical products)
1.Listed wastes -
321
wastes that do not meet any of the listings above but that exhibit ignitability, corrosively, reactivity, or toxicity
2.Characteristic wastes -
322
batteries, pesticides, mercury-containing equipment (e.g. thermostats) and lamps (e.g., fluorescent bulbs)
3.Universal wastes -
323
waste that contains both radioactive and hazardous waste components.
4.Mixed wastes
324
TWO TYPES OF HAZARDOUS WASTE
1.Designated waste (listed waste) 2.Characteristic wastes -
325
➡is one that is specifically listed by USEPA as Hazardous
1.Designated waste (listed waste)
326
➡is one that exhibits any one of the characteristics of ignitability, corrosiveness, reactivity and toxicity. It is wastes that do not meet any of the listings type wastes but that exhibit ignitability, corrosiveness, reactivity and toxicity
2.Characteristic wastes -
327
designates more than 450 listed wastes which are specific substances or classes of substances known to be Hazardous, classified into four groups or lists: 1. F-type (waste from nonspecific sources) 2. K-type (wastes from specific sources) 3. P-type (acute hazardous wastes) 4. U-type (miscellaneous hazardous wastes)
EPA
328
TYPES OF LISTING TYPE WASTES
1. F-type (waste from nonspecific sources) 2. K-type (wastes from specific sources) 3. P-type (acute hazardous wastes) 4. U-type (miscellaneous hazardous wastes)
329
* Because the processes producing these wastes can occur in different sectors of industry, the F-listed wastes are known as wastes from non-specific sources.
1. F-type wastes (nonspecific wastes)
330
* For example: This list identifies wastes from common manufacturing and industrial processes, such as solvents that have been used in cleaning or degreasing operations.
1. F-type wastes (nonspecific wastes
331
* This list includes certain waters from specific industries, such as petroleum refining or pesticides manufacturing. * Certain sludge and wastewater from treatment and production processes in these industries are examples of source-specific wastes.
2. The K-list (source-specific wastes)
332
* Wastes that have been found to be fatal to humans in low doses, or capable of causing or significantly contributing to an increase in serious irreversible or incapacitating reversible illness.
3. P-type (acute hazardous wastes)
333
* For example: These are mostly specific chemical species such as fluorine (P056) or 3-chloropropane nitrile (P027).
3. P-type (acute hazardous wastes)
334
* A different variety of waste are listed here. * These are predominantly specific compounds such as calcium chromate (U032) or phthalic anhydride (U190).
4. U-type (miscellaneous hazardous wastes)
335
EFFECTS OF POLLUTION ON THE ECOSYSTEM
The impact of hazardous waste on the environment is thought to be widespread and in some areas severe. Establishing cause-and-effect relationships between exposure and ecosystem damage is a major challenge. Even a mature ecosystem —one that has achieved stability over time— is constantly adapting to changes. Some of these changes are due to natural influences such as animal migrations patterns, weather, erosion, and sedimentation. Other changes, however, are the result of habitat encroachment and human pollution. This pollution is often in the form of complex mixtures of chemicals in widely varying concentrations.
336
EFFECTS OF POLLUTION ON THE ECOSYSTEM
As ecosystems are complex and dynamic (ever changing), it makes linking any one effect to a specific cause very difficult. Conditions cannot be controlled sufficiently to allow the effects of individual pollutant to be observed. Only recently have scientists begun to focus attention on finding ways to determine the major effects of hazardous waste on ecosystems. But results from laboratory models cannot provide adequate measures of the diversity of species and the complexity of the relationships among all the living organisms that make ecosystems unique.
337
EFFECTS OF POLLUTION ON THE ECOSYSTEM
There is no single best strategy or design for assessing environmental pollution that is appropriate for every situation. Scientist generally use four major categories of tests to assess the impact of hazardous waste on ecosystems: ➡Chemical and physical tests - to measure contaminant levels, pH, oxygen levels, and other environmental conditions ➡Toxicity tests - to determine if the pollution can or is causing adverse biological effects in ecosystem species ➡Biomarkers - to indicate actual exposure ➡Field surveys The ecological assessments are important tools for any efforts to clean up hazardous waste contamination under the Superfund Program.
338
Scientist generally use four major categories of tests to assess the impact of hazardous waste on ecosystems:
➡Chemical and physical tests - ➡Toxicity tests ➡Biomarkers ➡Field surveys
339
to measure contaminant levels, pH, oxygen levels, and other environmental conditions
Chemical and physical tests
340
to determine if the pollution can or is causing adverse biological effects in ecosystem species
➡Toxicity tests
341
- to indicate actual exposure
➡Biomarkers
342
Ideally, the waste can be stabilized, detoxified, or somehow rendered harmless in a treatment process similar to the following:
1. Chemical Stabilization/Fixation 2. Volume Reduction 3. Waste Segregation 4. Detoxification 5. Degradation 6. Encapsulation
343
- In this process, chemicals are mixed with water sludge, the mixture is pumped onto land, and solidification occurs in several days or weeks. Chemical stabilization offers an alternative to digging up and moving large quantities of hazardous waste, and is particularly suitable for treating large volumes of dilute waste.
Chemical Stabilization/Fixation
344
- It is usually achieved by incineration, which takes advantage of the large organic fraction of waste being generated by many industries, but may lead to secondary problems for hazardous waste engineers: air emissions in the stack of the incinerator
* Volume Reduction
345
Many thermal, chemical, and biological processes are available to detoxify chemical wastes.
* Detoxification
346
Many thermal, chemical, and biological processes are available to detoxify chemical wastes. Options include:
1. neutralization 2. ion exchange 3. incineration 4. pyrolysis 5. aerated lagoons 6. waste stabilization ponds
347
There are different forms of degradation:
1. Chemical degradation - a form of chemical detoxification 2. Waste-specific degradation - processes include hydrolysis 3. Biological degradation - generally involves incorporating the waste into the soil 4. Land farming - relies on healthy soil microorganisms to metabolize the waste components.
348
It is the method thats chemically degrade some hazardous wastes and render them less hazardous exist.There are different forms of degradation:
Degradation
349
a form of chemical detoxification
Chemical degradation
350
processes include hydrolysis
2. Waste-specific degradation
351
generally involves incorporating the waste into the soil
3. Biological degradation
352
relies on healthy soil microorganisms to metabolize the waste components.
4. Land farming
353
- Before shipment to a processing or long-term storage facility, wastes are segregated by type and chemical characteristics.
Waste Segradation
354
A wide range of material to encapsulate hazardous waste is available. Options include the basic 55-gal steel drum (the primary container for liquids), clay, plastics, and asphalt.
Encapsulation
354
Hazardous wastes are transported across the nation on
trucks, rail flatcars, and barges.
355
is a highly visible and constant threat to public safety and the environment.
Truck transportation and particularly small-truck transportation
356
There are basic elements in the control strategy for the movement of hazardous waste from a generator:
1. Haulers 2. Hazardous Waste Manifest 3. Packaging 4. Labelling and Placarding 5. Accident and Incident Reporting
357
In hazardous waste management, two types of systems exist for transferring this waste to a location where it is viewed as a resource:
hazardous waste materials transfer and hazardous waste information clearinghouse.
358
An industrial process typically has three outputs:
a principal product (which is sold to a consumer) a useful by-product available for a sale to another industry waste (historically destined for ultimate disposal)
359
a wide range of factors must be considered in siting hazardous waste management facilities.
Siting Consideration -
360
In selecting a site, all of the relevant “-ologies” must be considered:
1. Hydrology 2. Climatology 3. Geology 4. Ecology 5. Alternative land use 6. Transportation 7. Socioeconomic Factors
361
is a controlled process that uses combustion to convert a waste to a less bulky, less toxic, or less noxious material.
Incineration
362
The principal products of incineration from a volume standpoint are
carbon dioxide, water, and ash,
363
but the products of primary concern because of their environmental effects are compounds containing
sulfur, nitrogen, and halogens.
364
refers to mixtures of hazardous and radioactive wastes; for example, organic solvents used in liquid scintillation counting are an excellent example.
*Mixed waste
365
must be adequately designed and operated if public health and the environment are to be protected.
landfills
366
The general components that go into the plans of a landfill are the following:
Design Operation Site Closure
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METHODS OF WASTE DISPOSAL (RADIOACTIVE WASTE)
Decay in storage (DIS) Dump to sanitary sewer Dispose as if not radioactive Vitrification Geological disposal Reprocessing Transmutation Space disposal Deep boreholes
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Decay in storage (DIS)
find it
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glass Low solubility Immobilization of waste for thousands of years Widely used for storage purpose
Vitrification
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specifically involves converting a chemical element into another less harmful one. Common conversions include going from Chlorine to Argon or from Potassium to Argon. More studies are conducted to make nuclear energy back on track as the leading clean, safe and efficient form of energy.
Transmutation
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has emerged as an option but not as a very viable one. Specifically, space disposal centers around putting nuclear waste on a space shuttle and launching the shuttle into space. Problems: The amount of nuclear waste that could be shipped on a single shuttle would be extremely small compared to the total amount of waste produced. There is a possibility of the shuttle explosion.
Space disposal
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Deep boreholes envisioned forholding highly radioactive waste would be far deeper than proposed or exixting underground disposal
Deep boreholes
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in one version waste canisters would sit in the lowest part of the hole
Niccole R. Fuller
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- refers to the management of an organization’s environmental programs in a comprehensive, systematic, planned and documented manner. * It includes the organizational structure, planning and resources for developing, implementing and maintaining policy for environmental protection.
Environmental management system (EMS)
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"a system and database which integrates procedures and processes for training of personnel, monitoring, summarizing, and reporting of specialized environmental performance information to internal and external stakeholders of a firm".
Environmental management system (EMS)
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The most widely used standard on which an EMS is based on is the International Organization for Standardization (ISO) 2004.
Environmental management system (EMS)
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is an information technology solution for tracking environmental data for a company as part of their overall environmental management system.
Environmental Management Information System (EMIS) or Environmental Data Management System (EDMS)
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can be challenged in federal court.
*The adequacy of an environmental impact statement (EIS)
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*Major proposed projects have been blocked because of an
agency’s failure to prepare an acceptable EIS.
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*One prominent example was the
Westway landfill and highway development in and along the Hudson River in New York City.
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Another prominent case involved the---------over its denial of the club’s request to issue a supplemental EIS addressing air emissions of particulate matter and hazardous air pollutants in the case of widening US Route 95 through Las Vegas.
Sierra Club suing the Nevada Department of Transportation
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Environmental Management System includes the following:
1) Environmental Impact Assessment (EIA) 2) Environmental Clearance Certificate (ECC)
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Environmental Impact Assessment
Transparency, certainty, partici[ation, praticability, flexibility, cost effectiveness, credability, accountability
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is a systematic process of identifying future consequences of a current or proposed action.”
”EIA
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is a process of evaluating the likely environmental impacts of a proposed project or development, taking into account inter-related socio-economic, cultural and human-health impacts, both beneficial and adverse.
Environmental Impact Assessment (EIA)
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➡ It is an important management tool for ensuring the optimal use of natural resources for sustainable development.
Environmental Impact Assessment (EIA)
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is the study of the unintended consequences of a project.
๏Environmental Management or planning
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- Its purpose is to identify, examine, assess and evaluate the likely and probable impacts of a proposed project on the environment and, thereby, to work out remedial action plans to minimize adverse impact on the environment.
๏Environmental Management or planning
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defines Environmental Impact Assessment (EIA) as a tool used to identify the environmental, social and economic impacts of a project prior to decision-making.
๏United Nations Environment Programme (UNEP)
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aims to predict the environmental impacts at an early stage in project planning and design, find ways and means to reduce adverse impacts, shape objects to suit the local environment and present the predictions and options to decision-makers.
Environmental Impact Assessment (EIA)
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*By using EIA both--------------- can be achieved, such as reduced cost and time of project implementation and design, avoided treatment/clean-up costs and impacts of laws and regulations.
environmental and economic benefits
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*Although legislation and practice vary around the world, the fundamental components of an EIA would necessarily involve the following stages:
1) Screening 2) Scoping 3) Assessment and Evaluation of impacts and development of alternatives 4) Reporting the Environmental Impact Statement (EIS) or EIA report 5) Review of the Environmental Impact Statement (EIS) 6) Decision-making 7) Monitoring, compliance, enforcement and environmental auditing
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*The structure of a generic Environmental Assessment is as follows:
1. Summary 2.Introduction *Background *Purpose and Need for Action *Proposed Action *Decision Framework *Public Involvement *Issues 3.Alternatives, including the Proposed Action *Alternatives * Mitigation Common to all Alternatives *Comparison of Alternatives 4. Environmental Consequences 5.Consultation and Coordination
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The Environmental Impact Assessment (EIA) System in the Philippines, officially referred to as the
Philippine EIS System (PEISS), was established under Presidential Decree (PD) 1586 on 11 June 1978.
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provides that no person, partnership or corporation shall undertake or operate any such declared environmentally critical project or area without first securing an Environmental Compliance Certificate (ECC).
Section 4 of PD 1586
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Full implementation of the PEISS transpired after the issuance of ---------------- where the technical definition of Environmentally Critical Projects (ECPs) and Environmentally Critical Areas (ECAs) was provided.
Presidential Proclamation 2146 in 1981
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The following are the key systems-oriented operating principles in the implementation of the Philippine EIA System:
The EIS System is concerned primarily with assessing the direct and indirect impacts of a program or project on the biophysical and human environment and ensuring that these impacts are addressed by appropriate environmental protection and enhancement measures; The EIS System aids proponents and stakeholders in incorporating environmental considerations in planning their project as well as determining the impacts on the environment of their project; The project proponents and stakeholders are responsible for determining and disclosing all relevant information and data necessary for a methodical assessment of the environmental impacts of their project;
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The following are the key systems-oriented operating principles in the implementation of the Philippine EIA System:
The review of EIA Reports by the DENR-EMB shall be guided by three general criteria: (a) that environmental considerations are integrated into the overall project planning, (b) that the assessment is technically sound and the proposed environmental mitigation measures are effective and doable, and (c) that the EIA process is based on a timely, informed and meaningful public and wide-ranged participation of potentially affected individuals, groups and communities; Effective regulatory review of the EIA Reports depends largely on timely, complete and accurate disclosure or relevant information and data by the project proponents and other stakeholders in the EIA process; and, The timeliness prescribed by the system within which a decision must be made or issued applies only to processes and actions within the DENR- EMB’s control and do not include actions and
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Laws and Policies for Environmental Impact Assessment:
Presidential Decree (PD) 1586 Executive Order (EO) 190 Administrative Order (AO) 300 Administrative Order (AO) 42 Department Administrative Order - Document No.: DENR Memorandum Circular - Document No.: EMB Memorandum Circular - Document No.:
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➡ Establishing an Environmental Impact Statement System including other environmental management related measures and for other purposes
Presidential Decree (PD) 1586
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➡ Abolishing the golf course construction and development committee and transferring its powers and functions to the DENR
Executive Order (EO) 190
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➡ Further strengthening The Environmental Impact Statement System and clarifying the authority to grant or deny the issuance of Environmental Compliance Certificates
Administrative Order (AO) 300
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➡ Rationalizing the implementation of the Philippine Environmental Impact Statement (EIS) System and giving authority in addition to the Secretary of the Department of Environment and Natural Resources to the Director and Regional Directors of the Environmental Management Bureau to grant or deny the issuance of Environmental Compliance Certificates
Administrative Order (AO) 42
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Department Administrative Order - Document No.:
➡ DAO 2005-06 ➡ DAO 2005-02 ➡ DAO 2004-61 ➡ DAO 2003-30 ➡ DAO 2001-09 ➡ DAO 2000-37 ➡ DAO 2000-05 ➡ DAO 1999-37 ➡ DAO 1996-37 ➡ DAO 1992-21
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DENR Memorandum Circular - Document No.:
➡DMC 2007-23 ➡DMC 2007-08 ➡DMC 2006-01 ➡DMC 2005-021 ➡DMC 2002-15
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EMB Memorandum Circular - Document No.:
➡EMB MC 2019-005 ➡EMB MC 2019-003 ➡EMB MC 2010-004 ➡EMB MC 2010-002 ➡EMB MC 2007-001 ➡EMB MC 2006-003 ➡EMB MEMO 1.10.2006 ➡EMB MEMO 9.08.2005 ➡EMB MC 2005-01 ➡EMB MC 2004-04 ➡EMB MC 2004-001 ➡EMB MC 2004-002 ➡EMB MC 2003-21 ➡EMB MC 2003-009 ➡EMB MC 2003-004 ➡EMB MC 2002-04 ➡EMB MC 2002-03 ➡EMB MC 2001-02 ➡EMB MC 2001-01 ➡EMB MC 2000-01 ➡EMB MC 2000-02 ➡EMB MC 2002-02
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as the formalized, systematic and comprehensive process of identifying and evaluating the environmental consequences of proposed policies, plans or programs to ensure they are fully included and appropriately addressed at the earliest possible stage of decision-making on a par with economic and social considerations.
‣Sadler and Verheem (1996) define Strategic Environmental Assessment (SEA)
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does not replace or reduce the need for project- level EIA (although in some cases it can), but it can help to streamline and focus the incorporation of environmental concerns (including biodiversity) into the decision-making process, often making project-level EIA a more effective process.
Strategic Environmental Assessment
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might be applied to an entire sector (such as a national policy on energy for example) or to a geographical area (for example, in the context of a regional development scheme).
Strategic Environmental Assessment
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*Environmental threats do not respect
national borders.
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can have detrimental effects on the atmosphere, oceans, rivers, aquifers, farmland, the weather and biodiversity.
*International pollution
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Specific pollution threats include acid rain, radioactive contamination, debris in outer space, stratospheric ozone depletion and toxic oil spills.
*Global climate change is transnational.
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precipitated by a nuclear accident, is a stark reminder of the devastating effects of transboundary nuclear pollution.
Chernobyl disaster,
410
is inherently a cross-border issue and has led to the creation of transnational regulation via multilateral and bilateral treaties.
*Environmental protection
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with a comprehensive mandate, most international treaties exist parallel to one another and are further developed without the benefit of consideration being given to potential conflicts with other agreements.
no universal legislature or administration
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is a piece of legislation generated from the Environmental Management Act Chapter 35:05.
Certificate of Environmental Clearance Rules, 2001
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*The “Rules” guides the assessment of a small and large-scale developmental projects which may have both
positive and negative environmental effects.
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as amended defines the forty-four (44) activities which require a CEC.
The Certificate of Environmental Clearance (Designated Activities) Order, 2001,
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During the assessment of the these applications, the Authority takes into consideration------------------- which may arise out of any new or significantly modified construction, process, works or other activity as outlined by the Order.
foreseeable impacts
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*At the preliminary phase of the assessment of the proposed project, if potential significant environmental and human health impacts have been identified, the applicant may be asked to conduct an
Environmental Impact Assessment (EIA).
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*Any project in the Philippines that poses a potential environmental risk or impact (such as mining, agriculture projects, and construction) is required to secure an
Environmental Compliance Certificate (ECC) from the Department of the Environment and Natural Resources — Environmental Management Board (DENR-EMB).
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is required to secure an Environmental Compliance Certificate (ECC) from the Department of the Environment and Natural Resources — Environmental Management Board (DENR-EMB).
Any project in the Philippines that poses a potential environmental risk or impact (such as mining, agriculture projects, and construction)
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ROLES OF AN INDIVIDUAL IN POLLUTION PREVENTION
Think globally, act locally Use eco-friendly products Use rechargeable batteries No to excess pesticides, chemicals, paints, solvents Use less or only required quantity of resource Plant more trees (local species) 3 R’s - Reduce, Reuse, Recycle
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INITIATIVES FOR POLLUTION PREVENTION
Laws have been made and are followed in regards to pollution problems Pollution control boards Pollution level standards: established and compulsory to maintain NGO’s initiatives Research and development of better technologies Awareness in schools, colleges, and offices.
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MAJOR ENVIRONMENTAL LAWS IN THE PHILIPPINES
REPUBLIC ACT 9003 ECOLOGICAL SOLID WASTE MANAGEMENT ACT OF 2000 REPUBLIC ACT 9275 PHILIPPINE CLEAN WATER ACT OF 2004 REPUBLIC ACT 8749 PHILIPPINE CLEAN AIR ACT OF 1999 REPUBLIC ACT 6969 TOXIC SUBSTANCES, HAZARDOUS AND NUCLEAR WASTE CONTROL ACT OF 1990 PRESIDENTIAL DECREE 1586 ENVIRONMENTAL IMPACT STATEMENT (EIS) STATEMENT OF 1978
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➡ In partnership with stakeholders, the law aims to adopt a systematic, comprehensive and ecological solid waste management program that shall ensure the protection of public health and environment. ➡ The law ensures proper segregation, collection, storage, treatment and disposal of solid waste through the formulation and adaptation of best eco-waste products.
REPUBLIC ACT 9003 ECOLOGICAL SOLID WASTE MANAGEMENT ACT OF 2000
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➡ The law aims to protect the country's water bodies from pollution from land-based sources (industries and commercial establishments, agriculture and community/household activities). ➡ It provides for comprehensive and integrated strategy to prevent and minimize pollution through a multi- sectoral and participatory approach involving all the stakeholders.
REPUBLIC ACT 9275 PHILIPPINE CLEAN WATER ACT OF 2004
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➡ The law aims to achieve and maintain clean air that meets the National Air Quality guideline values for criteria pollutants, throughout the Philippines, while minimizing the possible associated impacts to the economy.
REPUBLIC ACT 8749 PHILIPPINE CLEAN AIR ACT OF 1999
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➡ The law aims to regulate restrict or prohibit the importation, manufacture, processing, sale, distribution, use and disposal of chemical substances and mixtures the present unreasonable risk to human health. ➡ It likewise prohibits the entry, even in transit, of hazardous and nuclear wastes and their disposal into the Philippine territorial limits for whatever purpose; and to provide advancement and facilitate research and studies on toxic chemicals
REPUBLIC ACT 6969 TOXIC SUBSTANCES, HAZARDOUS AND NUCLEAR WASTE CONTROL ACT OF 1990
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is a body of international law concerned with protecting the environment, primarily through bilateral and multilateral international agreements. ‣Although conservation movements developed in many nations in the nineteenth century, these movements typically only addressed environmental concerns within a single nation.
International environmental law
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➡ The Environment Impact Assessment System was formally established in 1978 with the enactment of Presidential Decree no. 1586 to facilitate the attainment and maintenance of rational and orderly balance between socio-economic development and environmental protection. ➡ EIA is a planning and management tool that will help government, decision makers, the proponents and the affected community address the negative consequences or risks on the e n v i ro n m e n t . Th e p ro c e ss a ss u re s i m p l e m e n t a t i o n o f environment-friendly projects.
PRESIDENTIAL DECREE 1586 ENVIRONMENTAL IMPACT STATEMENT (EIS) STATEMENT OF 1978
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WHO MAKES INTERNATIONAL ENVIRONMENTAL LAWS? ‣ International environmental law is derived primarily from three sources:
- Customary international law - International treaties - Judicial decisions of international courts
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‣By the --------, the international community realized that an international approach to environmental issues was required
Late 1960's
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refers to a set of unwritten laws that have arisen from widespread custom and usage among nations
- Customary international law
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decisions given by such as the International Court of Justice or the International Tribunal for the Law of the Sea
- Judicial decisions of international courts
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includes laws on warning a neighboring nation about a major accident that could affect its environment
- International treaties
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ONE OF THE EARLIEST LAWS ESTABLISHED, WHICH IS ALSO A KEY FOUNDATION OF INTERNATIONAL ENVIRONMENTAL LAWS THAT FOLLOWS, IS THE
“POLLUTER PAYS PRINCIPLES”.
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This was was created due to the air pollution of the Canadian smelting factory on the 1930’s-1940’s that causes a dispute between United States and Canada. The pollution destroyed crops in the United States as it blew across the American-Canadian border.
polluter pays principle
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holds that if pollution from one nation causes harm in another nation, then the polluter nation must pay to remedy the damage.
polluter pays principle
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This was was created due to the ----------------------- that causes a dispute between United States and Canada. The pollution destroyed crops in the United States as it blew across the American-Canadian border.
air pollution of the Canadian smelting factory on the 1930’s-1940’s
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-is an international agreement designed to protect endangered plants and animals by regulating the trade of endangered species or products derived from them, which goes in effect since 1975 -promulgated by the World Conservation Union (IUCN), a NGO dedicated to environmental conservation, and other 80 nations who attend the conference
➡Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES)
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The destruction of ecosystems and the exploitation of wild flora and fauna were the first environmental issues.
➡Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES)
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The United Nations (UN) convened the first major international conference on the environment, in Stockholm, Sweden, in 1972, also know as “
Stockholm Conference
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also created the United Nations Environment Programme (UNEP)—- an institutional home for environmental protection in the United Nations.
Stockholm Conference
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‣ It highlighted the international aspects of emerging environmental challenges and legitimized the environment as an area of international cooperation.
Stockholm Conference
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Since the-----------, the world has met regularly in a series of major summits aimed at shifting the world generally toward a path of sustainability.
1972 Stockholm Conference
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The most important by far has been the 1992 UN Conference of Environment and Development (UNCED), also known as the .
“Rio Earth Summit”
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In the Earth Summit, world leaders agreed to a 500-page blueprint of comprehensive plan of action for sustainable development (known as AGENDA 21) and to three (3) major treaties:
1)addressing climate change 2) biological diversity 3) desertification
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This is a United Nations-sponsored treaty/agreement that binds signatory nations to commit in reducing their greenhouse-gas emissions
KYOTO PROTOCOL
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The protocol, drafted and agreed in-------------------, marked the finalization of years of negotiations that emerged from the U.N. Framework Convention on Climate Change (UNFCCC).
Kyoto, Japan, in December 1997
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is the only signatory that has not ratified the Protocol
As of 2020, the US
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Global Environmental Agreements
Montreal Protocol UN Framework Convention on Climate Change Kyoto Protocol Paris Agreement Cartagena Protocol on Biosafety Convention to Combat Desertification Ramsar Wetlands Convention Basel Convention on Hazardous Wastes Stockholm Convention on POPs Rotterdam Convention on PIC Minimata Convention on Mercury
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F o r i n t e r n a t i o n a l e n v i r o n m e n t a l legislations, a number of them are regulated and assessed by -------------------, working closely with UN.
Environmental Protection Agency (EPA)
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439
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