Toxics & Hazardous
Materials
(excerpted from U.S. Environemtal Protection Agency Guide on
Environmental Issues)
Overview How Does the Law Protect Society? |
Toxic chemicals, pesticides, and hazardous and
solid waste disposal affecting air and water are major factors in technological disasters.
PESTICIDES |
You may not need a pesticide at all. Sometimes cleaning or
removal of objects attracting a "pest"are all that is necessary.
Take special precautions to apply the chemical exactly according to the label
instructions. Wear protective clothing indicated on the label over hands and
face and keep all containers isolated from children or pets. Close off rooms
to children and pets when a pesticide has been applied, and never use a pesticide close to
your face.
Outdoors, be aware that pesticides also can kill many beneficial insects as well as birds
and squirrels. Some chemicals are unusually persistent, meaning residues are left in
the environmentfor long periods of time, even years. Watch for "Household Hazardous
Waste Disposal Days" in your community to bring any
unused amounts or empty containers for proper disposal. Because of their inherent
nature, all pesticides, including home, lawn, and garden pesticides, are potentially toxic
and should be used with
the utmost care.
QUESTIONS & ANSWERS ON PESTICIDES
Q. Are there any
alternatives to using pesticides?
A. Yes. Scientists have begun
to manage, rather than try to eradicate, certain species using Integrated Pest Management
(IPM). IPM uses a combination of biological, cultural, and genetic control
methods,
with use of pesticides as the last resort. Understanding a species' life
cycle is essential to reduce the use of pesticides. Population explosions can
be prevented and reptiles, birds, bats, and predator insects used as natural pest
controls. A sustainable farm ecosystem provides habitat for amultitude of
beneficial organisms which maintain the pest-predator balance.
Q. What natural controls
can I use in my garden?
A. Many garden shops and
nurseries have resident experts on this topic, as do county extension services.
Some common methods include planting marigolds to repel asparagus beetles. Beer or vinegar
in a
shallow pan readily attracts and traps slugs and snails. Gypsy moths on oak
and ornamental trees can
be
controlled by a common bacterial spray applied at the hatching and early larval stages (a
form of
IPM). In addition, several soaps are on the market that are pest-specific and
biodegradable.
Q. What does organically
grown mean?
A. Growing organically is an
alternative approach that views the farm as an agro-ecosystem. The key
principle is biodiversity, first accomplished
by building a balanced, fertile soil rich in microorganisms.
This
concept of "feeding the soil, not the plant" imparts resistance and vigor to the
crops grown. A
diversity of crops are grown in a long period of rotation, particularly grasses and
legumes for animal
forage and green manures. Such rotations break pest life cycles, improve soil fertility,
and reduce soil
erosion.
In addition, the natural resources on the farm such as forests, wetlands, and
meadows are
viewed as critical resources for climate and water management and provide habitat for
indigenous
species.
Certified organic crops can be harvested after three continuous years since the last
application of a
prohibited pesticide or fertilizer. But organically grown does not mean
"no spray." Farmers can use
naturally
derived pesticides that break down quickly in the environment; some wash off with rain.
Other synthetically
derived materials that can be used include toxins from bacteria, soaps, fish emulsions,
vitamins, minerals, and certain medicines for livestock. In practice, livestock must be
fed organically
grown grains and forages, and can receive no hormones,antibiotics, or medications that
increase growth or
production.
Q. What pesticides are
banned in the U.S.?
A. The Federal Environmental
Protection Agency (EPA) has banned different pesticides, including aldrin, DDT, dinoseb,
and vinyl chloride. Others restricted in use -- that is, they must be applied by or
under the direct supervision of a certified applicator. Banned or restricted
chemicals are acutely toxic to farmworkers and applicators, as well as various mammals,
birds, and aquatic animals, and have environmental effects long after suspended use.
HAZARDOUS WASTE
Today's complex sophisticated technologies produce consumer goods ranging from cars to
cleaning fluids and generate hazardous wastes of one sort or another in the process.
Hazardous wastes include chemicals that are corrosive, flammable, reactive, or
toxic. Hazardous wastes may be by-products of manufacturing processes or discarded
consumer products, such as household cleaning fluids, paints, and batteries. Once
generated, hazardous wastes require proper storage, treatment,and disposal.
QUESTIONS & ANSWERS ON HAZARDOUS WASTE
Q. What should I do if I suspect hazardous waste
dumping?
A. Contact the National Response Center
if you detect signs of illegal dumping such as:
o
Drums in the woods, on roadsides or abandoned property, in empty
buildings or city or county
landfills
o
Odors that smell like turpentine, paint, fingernail polish, glue, rotten eggs,
or any
unfamiliar chemical odor
o
Discolored soil with dead vegetation along roadsides, in abandoned lots or
fields, around
vacant buildings, or beside streams and rivers
o
Abandoned warehouses or factories with leaking drums or waste-like
material
o
Sludge-like appearance or ooze on the ground.
Q. Can hazardous wastes be incinerated safely?
Does incineration make hazardous wastes non-hazardous?
A. A hazardous waste incinerator that is properly
designed and operated to meet performance standards set by EPA can
safely and effectively reduce or destroy a wide variety of hazardous wastes.
Depending othe
composition of the hazardous wastes, some wastes can be rendered non-hazardous. The
residues left after incineration,
such as ash and materials from air pollution control equipment, must be properly
managed and
disposed of in accordance with EPA requirements.
Federal legislation mandates each state to provide a 20-year plan to
assure that the state had the capacity to dispose of hazardous and solid wastes generated
within its borders. Most hazardous wastes cannot be landfilled and some must
be incinerated because they have no other disposal method. In addition, many
states simply have no available landfill space, and so municipal solid waste,
including household garbage, must be incinerated. New facilities are waste-to-energy
plants which convert the heat from combustion into electricity for the community --
an added bonus to eliminating tons of trash.
Q. How are citizens assured that permitted hazardous
waste facilities are complying with the law?
A. Hazardous waste inspectors have the right to enter
a facility at any reasonable time for an inspection,
which may be unannounced.
Facilities are inspected for compliance with laws and regulations, as well as
with the specific conditions
of their individual permits. When violations are found, they are followed by
appropriate actions, ranging from issuance of a non-compliance notice to initiation
of a criminal investigation. If you have reason to believe that a
hazardous waste facility is not complying with the law, call your state environmental
office with responsibility for hazardous waste. A complaint filed with the agency
may result in an unannounced inspection of the facility.
Q. What is the difference between hazardous waste
management and treatment?
A. Hazardous waste management refers to the precautions taken
to reduce the dangers of handling or disposing of hazardous wastes. Hazardous waste
treatment refers to practices which render the wastes non-hazardous or less
harmful. Treatment methods include neutralization, such as mixing acids with bases
to make their pH more like that of water, biological treatment to break the waste down
into simpler compounds, and incineration.
Q. What is being done to reduce hazardous wastes?
A. Better manufacturing processes and worker training
are reducing quantities used and non-hazardous or less hazardous ingredients are
being substituted in processes. Some wastes are refined and recycled;
others are immobilized so they cannot be released into the environment. Another important
way is to design well-managed, well-regulated hazardous waste management facilities with
proper state permits.
Q. Officials in my area have just declared an old
abandoned property in my community a Superfund site. What does that mean?
A. Under federal laws, abandoned hazardous waste sites that pose
an immediate threat can be cleaned up under emergency response and removal
programs. Sites that do not pose an immediate danger but have significant
contamination may be cleaned up by responsible parties or under federal or state
investigation and cleanup programs.
Q. Shouldn't the folks who put the chemicals in the
dump pay for the cleanup?
A. Yes. Using Superfund enforcement authority, EPA locates
the owners, operators, generators, and transporters and negotiates for the
cleanup. Those who contributed only minimal amounts or low-toxicity wastes (de
minimis parties) can 'cash out', putting their proportional share of costs into a trust
fund for the cleanup. Or EPA can order non-cooperative parties to conduct the work.
Cleanup doesn't have to wait until legal and financial issues are resolved. EPA can
stabilize the site and then pursue responsible parties to recover costs and commit to
long-term remedial actions.
Q. How do I dispose of household hazardous wastes,
such as old pesticides, paints, acids, cleaners, and used oils?
A. Watch your newspaper for local 'Household Hazardous
Waste Disposal Days. Often local organizations or businesses, in cooperation
with state environmental agencies, will sponsor free disposal if you bring your materials
to a specified collection site. Public service announcements on television and radio
also help to promote such events. In addition, some local gas stations recycle
used motor oils and old automobile batteries.
The best way to deal with household hazardous wastes is to purchase products wisely.
Estimate your needs accurately and buy the smallest quantity possible.
SOLID WASTE
Solid waste continues to receive a great deal of media attention across the country as
cities and counties deal with the lack of available space to dispose of household garbage
and municipal solid waste. In the early 1960s, cities and towns across
the country practiced open air burning of trash. The early days of the
"sanitary"landfill fouled ground water, soil, surface water, and air because of
improper disposal methods.
Each of us is part of the problem as well as the solution. From
gum wrappers to used cars, we exert our personal choices in what we purchase, how we use
the product, and how we dispose of the waste.
Simple solutions include purchasing goods with less packaging, maintaining and repairing
household appliances, and carrying reusable shopping bags. Recycling newspapers, aluminum
cans, glass, and some plastics is becoming more common at schools and the workplace.
Even if your town does not have a recycling program, you can effectively reduce
waste while conserving raw materials and energy. Yard and food wastes make up at
least 25% of materials heading for landfills. But making compost of these wastes
replaces soil nutrients and commercial fertilizers when placed in the garden.
Removal of these materials from household garbage also extends the useful life of existing
landfills.
QUESTIONS & ANSWERS ABOUT SOLID WASTE & WASTE DISPOSAL
Q. How do we dispose of solid wastes?
A. In 1990, more than 67% of our wastes were
landfilled. We recycled about 17% and the balance (16%) was incinerated.
Q. How is out-of-state garbage regulated?
A. Current legal readings of interstate commerce laws
suggest that a state, in general, cannot flatly refuse to accept out-of-state waste.
In other words, wastes exported to your state may be restricted only to the degree
in-state wastes are restricted. For example, if in-state or county mandatory
recycling laws are enacted to require separation of waste into recyclable and
non-recyclable components, out-of-state waste can be restricted in a similar manner.
Q. What goes into a solid waste landfill? What
happens to it over time?
A. On average, the solid waste that goes into a typical
municipal landfill contains 38% paper; 18% yard waste (trimmings, leaves, etc.); 8%
metals; 7% food; 7% glass; 6% wood; 8% plastics; and 8% miscellaneous. Biodegradable
materials may decompose over many years, while non-degradable materials, such as glass and
most plastics, remain at the site.
Q. When rainfall leaches through an unlined landfill,
how is ground water affected?
A. Leachate can contain a variety of substances
depending upon the contents of the waste, including metals, organic compounds,
suspended particles, and bacteria. If toxic wastes are deposited in the landfill,
the leachate can contain toxic chemicals that are hazardous even at low levels.
Many of these substances pollute the ground water. Most leachates are collected at
permitted landfills and treated at local sewage treatment plants. Treatment
can include aeration to eliminate volatile compounds and gases and to enhance
oxygen-dependent breakdown of organics, settling or filtering to remove sediment, and
other treatment to stimulate chemical or microbial breakdown of contaminants.
Q. Are hazardous wastes disposed of in landfills?
A. Both hazardous and solid waste regulations
prohibit disposal of hazardous waste in a landfill that is not specifically designed
and permitted. Nevertheless, we generate a great deal of hazardous wastes in our
homes that we unwittingly dispose of daily. For example, pesticides and paint
thinners may be tossed in trash taken to the landfill. Most businesses are regulated
and monitored for their hazardous waste disposal practices. Although some people and
companies illegally put hazardous wastes in landfills, heavy penalties including fines and
jail sentences make illegal disposal very unattractive.
Q. How do we know that infectious hospital wastes are
not going into landfills?
A. Only non-infectious hospital waste can be legally
dumped in a non-hazardous waste landfill. Hospitals operate under regulations that specify
disposal requirements for medical wastes. Violations of these rules can subject hospitals
to substantial penalties.
Q. How is the volume of waste entering a landfill
regulated?
A. Generally, the volume of waste accepted is set in
the terms of the landfill permit, usually as tons per month. The landfill operator weighs
the waste upon arrival, and tonnage reports must be submitted on a periodic basis to state
environmental agencies.
Q. How close can a landfill be to my house?
A. State and local regulations may require that a
landfill be a minimum distance from an occupied dwelling unless written permission to be
closer is given by the occupant. A common distance is 500 feet.
Q. Won't a landfill attract pests such as rats, flies,
and cockroaches?
A. At the end of each day, a landfill is required to
be covered with a layer of soil to deter scavenging animals.
If the cover is properly applied, these pests should be less of a problem.
Q. How will a landfill affect my well water? Who
can check my water to be sure it remains unpolluted?
A. Some state and local regulations require a landfill
to be located a minimum distance (in some states, at least 1,200 feet) from a well water
supply. Monitoring wells required around the landfill aid in the detection of ground
water contamination before it reaches the drinking water well. Monitoring
reports are usually available upon request from the county government, state environmental
agency, or your local health department, or county extension service. If a
well owner desires testing of a well, a certified laboratory should be hired to run the
tests. Names of such laboratories can be obtained from your local healthdepartment.
Q. How is a landfill closed? Are there any
possible uses or restrictions for a closed landfill?
A. A landfill that reaches capacity is covered with
a multi-layer, protective cap and planted with grasses and
other ground covers. The owner must then conduct post-closure care, which includes
monitoring of ground
water, landfill gases, and leachate collection systems. Monitoring may be
required for 30 years following closure. Few restrictions exist on how
the property over a closed landfill can be used. Parks and golf courses are examples of
possible uses. Construction of large buildings is usually avoided because of settling that
occurs during biodegradation and compaction of the waste.
AIR & RADIATION
Perhaps more than anything else, air interacts directly and constantly with us.
All land creatures breathe gases and materials suspended in the air.
By the same token, trees, grasses and other plant species carpeting the earth
are equally dependent on clean air. We all have a stake in the quality
of our air.
Outdoor air quality is affected by many human and natural activities.
Manufacturing companies, power plants, small businesses, automobiles, forest
fires, and volcanoes are all sources of air pollution. Any activity that
releases materials into the air affects air quality. Some 189 air toxics have
been identified that present significant health risks including cancer, respiratory
diseases, heart ailments, and reproductive disorders.
In many urban areas, ground level ozone persists in concentrations
harmful to human health due to large sources of pollutants such as nitrogen oxides and
smaller sources of hydrocarbons. Carbon monixide is also problem in cities.
QUESTIONS & ANSWERS ABOUT AIR QUALITY
Q. Whom do I call to
report visible emissions or noxious odors in the air?
A. Generally, your state
or local air quality office should be contacted. For emergencies, dial 911 or your local
fire department or public health agency. Be aware that visible emissions are
not necessarily the
most harmful;
most emissions are colorless or odorless.
Q. Who monitors the
required reports of toxic air emissions and safety measures used to control those
emissions?
A. EPA, your state air
quality office, the State Emergency Response Commission (SERC), and your Local Emergency
Planning Committee (LEPC) monitor these reports.
Q. Who sets the legal
air exposure limits for toxic chemicals?
A. EPA sets the
standards for outside (ambient) air, OSHA for the workplace.
Q. What is Best
Available Control Technology (BACT? What is MACT?
A. Best Available Control Technology (BACT) refers to the best equipment, techniques, or mechanisms that are currently available to achieve a level of pollution control. Through research, technology may be available in the future to achieve even better controls. MACT is Maximum Achievable Control Technology and refers to the maximum degree of pollution reduction obtainable.
Q. How
does eliminating toxic wastes at the source of production differ from utilizing best
available control technology
(BACT)?
A. Basically, at-source
control is a pollution prevention approach that seeks to keep hazardous wastes from being
produced. BACT, on the other hand, is the best technology for treating,
containing, or reducing discharges and emissions.
Q. What happens to toxic
airborne emissions when they are released from chemical plants, automobiles, or power
plants? Do they change into other toxics when they mix? Where are they
finally deposited?
A. We are only beginning
to find out what happens to emissions. Little is known about the interaction
of chemicals in ambient air, but some effects such as smog, ozone depletion, acid
rain, and climate change
are a few of the
known consequences when air emissions interact, are blown by the wind, and are deposited
in cities, fields, and wetlands. These effects have generated new
research to find answers.
Q. Do weather conditions
affect pollution and the dispersion of airborne chemicals?
A. Yes. Weather
conditionsþincluding temperature, sunlight, precipitation, and windþplay a major
role in how vapors and suspended particles behave. Sunlight can destroy or alter
some airborne chemicals. Rain, snow, and wind affect where and when air
pollutants are deposited on land or water.
Q. Are incinerators a
source of toxic emissions to the air?
A. Well-designed,
well-constructed, and well-operated incinerators can nearly eliminate toxic emissions to
the air. To receive a permit to operate, a hazardous waste incinerator must
demonstrate 99.99% efficiency in destroying most hazardous wastes. The standard is
even stricter for dioxins and PCBs.
SURFACE WATER
Although the vast majority of the earth's surface is covered with water, the oceans and
seas are salty. Only 3% is fresh and two-thirds of that is ice! This
tiny fraction of fresh water sustains a multitude of very specific life forms, including
our own. While many people get their drinking water from underground reserves,
surface waters also are an important source. In addition, lakes, rivers, and streams
provide boating, swimming, fishing, and other forms of recreation.
The economic support offered by plentiful and high quality surface waters includes
agricultural irrigation, process and cooling waters for power plants, and chemical, steel,
lumber, mining, and other industrial operations. The eastern U.S. has a
bountiful supply of this natural resource, while in the western states, the relative
scarcity of surface water serves to increase its value. In all parts of the
country, however, we need to use our water efficiently. Using less water
reduces the amount of wastes discharged into our lakes, streams, rivers, and oceans, as
well as the energy needed to treat wastewater.
Wetlands occupy a specialized niche between land and surface water, where plants and
animals abound. Wetlands have historically been viewed as mosquito-ridden
wastelands, impediments to development
because of their saturated and frequently flooded conditions. The importance
to fish and wildlife, clean water, and flood control went unappreciated as draining and
filling operations destroyed more than 60% of coastal and inland wetlands nationwide.
Discharges from industries, midnight dumping of toxic wastes, urban runoff,
acid rain, and agricultural chemicals have polluted and degraded wetlands as well.
Wet meadows, prairie potholes, wooded swamps, and coastal, saltwater marshes are
distinctly different. But all wetlands are important wildlife habitats, breeding grounds,
and nurseries. Hundreds of species of birds use wetlands for mating,
nesting,brood-rearing, and for resting and feeding during migration. Fish, crustaceans,
insects, and other animals form complex food chains in these valuable ecosystems.
A major challenge continues to be reduction and control of non-point source pollutants
that enter all surface waters -- water that runs off city streets and parking lots during
rainstorms that may contain metals, oil, grease, and other automotive fluids; runoff from
agricultural fields with animal waste, fertilizers, and pesticides.
Recent stormwater regulations are beginning to reduce nonpoint source pollution from
industries and cities. Farming practices that emphasize soil conservation and
appropriate use of pesticides are effective in reducing pollutants in runoff.
You can help prevent nonpoint source pollution by properly disposing of
used motor oil, using fewer pesticides, and carefully assessing lawn and garden practices.
By reducing the potential contaminants we place on
streets, driveways and lawns, we can make a substantial contribution to improving the
quality of rivers, streams, lakes, and wetlands.
QUESTIONS & ANSWERS ON SURFACE WATER
Q. Where can I get
information about the water quality of streams, lakes, wetlands, and other bodies of water
in my state?
A. State water quality
agencies, in general, maintain records of water quality for many state surface
waters. General information about
water quality is available through the state agency information offices, EPA, and many
citizen groups. EPA maintains an Office of Water Resource Center to answer general
questions about standards and water quality.
Q. How are water quality
standards developed for U.S. surface waters?
A. EPA develops water
quality criteria that indicate concentrations of contaminants that are not
expected to harm human health and aquatic life. States may use
these criteria to set water quality standards or they may develop their own standards that
address state-specific needs, are scientifically defensible, and as stringent as the
national criteria. States are required to review water quality standards every
three years. New information from EPA, industry, or any other group concerning
safe levels of materials in surface water may be considered, and existing standards may be
revised to reflect current scientific developments. Notices of proposed revisions are
published in newspapers to encourage the public to participate in the revision process.
State standards must be approved by EPA.
Q. How can I find out
what materials are being discharged into local bodies of water?
A. By submitting a
request to the water pollution control agency in your state, you can review the National
Pollutant Discharge Elimination System (NPDES) permits for specific dischargers into
surface water. New permits and renewals of existing
permits are published in local papers with information on how to review the
permit application. State and federal agencies,
including EPA's Office of Water and the U.S. Geological Survey, compile stream-specific
water quality data in various reports available to the public.
Q. What can I do if I
think that an NPDES permit should not be issued or that the requirements of the permit are
inadequate?
A. Anyone may comment on
the issuance or reissuance of an NPDES permit within the period listed in the public
notice. The permit-issuing agency must respond to public comments before granting
the permit. Most states have a process by which affected citizens and companies
may appeal the terms and conditions of a NPDES permit or who receives one.
Q. Whom do I contact if
I see a spill or notice unusual conditions such as color, odor, or fish kills in a
stream, lake, estuary, or coastal area?
A. First contact your
city or county public health department or check to see if your state has a
toll-free
pollution hotline. Any spill should bereported immediately to the National Response
Center.
For other complaints and concerns about water quality, call your state agency
representatives during normal business hours and ask for an investigation.
GROUND WATER
The nation's ground water resources are extremely valuable. Half of all
Americans and more than 95% of our rural population get their household water supplies
from underground sources. Ground water also is used for about half of all
agricultural irrigation and a third of industrial water needs. In many places, this vital
resource is already contaminated or threatened.
Even more than surface waters, ground water resources are often taken for granted because
they are not visible. Rainfall and surface water which had seeped into the earth's
crust over many years formed underground reservoirs. Where the water table is
at or close to the surface, ground water enters wetlands, lakes, rivers,
and streams and provides a base flow during dry periods. By comparison to
rivers and streams, ground water moves very slowly and with little turbulence.
Therefore, once contamination reaches ground water, little dilution or mixing
occurs. While wells and springs in many parts of the country are abundant and supply
good
quality water, contamination in other areas may be severe but undetected until the ground
water is used.
Use and dispose of household hazardous substances properly. Reduce your use of these
hazardous substances whenever possible. When you have to dispose of pesticides,
cleaning products, and paint, don't pour them down the drain, put them in the trash, or
dump them on the ground. Hazardous substances disposed of in these ways can
find their way into both surface and ground water. Reducing home water use also will
reduce ground water contamination.
Household products that are hazardous materials may be recycled. Check with local
gas stations and automotive centers about recycling used motor oils and batteries and with
paint stores for leftover paints and solvents. In many communities, businesses and
government agencies sponsor annual Household Hazardous Waste Days when citizens can bring
household chemicals to a central spot for collection, proper treatment, and/or disposal.
QUESTIONS & ANSWERS ON GROUND WATER
Q. How is ground water
contaminated?
A. Ground water may
become contaminated when rainfall and surface runoff pass through contaminated soil.
Water dissolves many substances and can carry particles and microorganisms with it
into the ground water. Landfills, mining, improperly applied pesticides, improperly
stored chemicals and de-icing salts, leaking underground storage tanks, improperly
installed or failing septic tanks, and other surface activities can significantly alter
ground water quality. Contamination often goes undetected for many years.
Q. If I notice a change
in the taste, color, or odor of my well water, whom should I contact?
A. You should contact
your county health department, state agency with ground water responsibility, and state
health department. These agencies can investigate the cause of the change in your
well water. In addition, information on ground water may be obtained by calling
EPA's Safe Drinking Water Hotlineor the U.S. Geological Survey.
Q. What should I do if I
suspect that a nearby facility may be contaminating my well and the ground water?
A. You should contact
the agencies listed above. Depending on the circumstances, they may be able to
help you. You might also contact the state agencies that issue
environmental permits to the facility;
permits can
be reviewed by the public.
Q. Can contaminated
ground water be cleaned up?
A. In some situations,
yes. Contaminated reservoirs that re limited in size may be cleaned up by
pumping water out of the aquifer for treatment by above-ground treatment systems.
Also, methods are under development to treat ground water in the subsurface, such as
biodegradation. However, ground water cleanup is very difficult, expensive, and less
than completely effective. Preventing ground water contamination is
more
practical to ensure good water quality.
Q. Are permits required
for water supplies and sewage treatment systems?
A. Yes. State health and
environmental agencies are responsible for certifying the adequacy of
municipal water supplies and sewage treatment systems.
Q. What is the
relationship between ground water and surface water?
A. Surface water seeps
into ground water during wet weather periods and the reverse occurs during drought
conditions. When close to the surface, ground water often becomes surface
water in the form of springs, wetlands, and streams. Contamination of ground water
can pollute surface water and vice versa.
Q. Are underground
storage tanks (USTs) regulated?
A. Yes. In 1988,
EPA issued regulations setting minimum standards for new tanks and requiring owners
of existing tanks to close, replace, or upgrade them. Tank owners and
operators are required to meet leak detection
requirements and to show they have financial resources to pay for cleanups should a leak
or spill occur. EPA estimates
that there are from 5 to 7 million USTs nationwide. Most of the USTs hold
petroleum and the rest hold hazardous materials, used motor oil, or other substances.
Q. Who runs the UST
program and who should be notified if a leak is suspected?
A. State and local
governments oversee the UST program. Report suspected leaks to the state
implementing agency. Contact Superfund/UST Hotline for the name, address, and telephone
number of the agency in your state.