How many drips does it take to make a splash?

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In late April of 2010, the Deepwater Horizon oil rig in the Gulf of Mexico had a catastrophic failure. For the better part of three months, images of oil slicks, outraged politicians and environmental groups decrying the damage being done dominated our news media before the ongoing spill was stopped and the coverage trailed off. Estimates of the amount of oil released during the incident are officially 4.9 million barrels and could have reached as high as 5.4 million barrels. (753 000 to 830 000 tonnes)

Fortunately, spills of this size are rare, and the previous largest North American spills on record were from 22 years earlier when the tanker Odyssey went down off of Nova Scotia (Canada) in 1988 and the smaller but well-reported Exxon Valdez spill off Alaska (USA) in 1989. Combined, these three events released approximately 925 000 tonnes of oil into the marine environment.

Based on previous reports by the US-based National Academy of Sciences, it is estimated that 84 000 tonnes of oil products are released in North America through on-land human activity each year and enter the marine environment through run-off and other means, mainly through storm and sewer drains.

This means that in the 22 years that the big spills cover, our on-land spills dripping from old cars, leaky equipment and general carelessness would have totalled 1 848 000 tonnes or about double what the highly publicized offshore spills generated.

With the coverage given to the off-shore spills, how many breaking news stories have you seen about the amounts of oil spilled by the average member of Joe Public? How many drips will take to make a splash?

 

Links:

http://www.noaanews.noaa.gov/stories2010/PDFs/DeepwaterHorizonOilBudget20100801.pdf

http://www.nap.edu/catalog.php?record_id=10388#description

 

 

Healthy or Hazardous: Selenium

Found in health stores as a supplement, selenium has been found to be required for the proper function of the human body – in tiny amounts.(1) While small concentrations are found naturally in foods, which are normally enough to sustain us, a number of controversial claims have been made that link elevated levels of selenium to health benefits for humans that range from cancer prevention to HIV/AIDS resistance. Overall, however, the recommended daily limit for adults is 55 micrograms per day, with an upper limit at 400 micrograms per day.  Exceeding this amount may put a person at risk of selenosis: symptoms can include a garlic odor on the breath, gastrointestinal disorders, hair loss, sloughing of nails, fatigue, irritability, and neurological damage. Extreme cases of selenosis can result in cirrhosis of the liver, pulmonary edema, and death. (2)

On the other side of the healthy/hazardous equation, however, is the effect of selenium on aquatic life. According to the EPA in the United States (3), selenium concentrations in drinking water must be below 50 parts per billion (50 micrograms per litre), and levels of selenium in saltwater above 127 micrograms per litre can lead to skeletal deformities in fish. (4)

Consumers have to be careful, however, as supplements often come in comparatively large-dose tablets, such as the 200 microgram tablets from Nature’s Way (5). This would mean that having more than a single tablet could push a person over their daily intake limit – and that each discarded tablet could render 1.5 litres of ocean water hazardous to aquatic life, or 4 litres of freshwater contaminated beyond levels recommended for human consumption.

Commercially, selenium is most often found as a by-product of such activities as refining copper and the creation of sulfuric acid. Uses for selenium range from tinting glass to creating electrical (DC) power surge protectors and solar cells. Environmental bodies do their best to keep a close eye on industrial producers, and regulations cover the maximum concentrations that companies are allowed to discharge into lakes, rivers and other water bodies. As always, however, a lower concentration does not always mean that the company is discharging any less of a pollutant – it simply means that the same amount of pollutant has been diluted into a bigger tank of water before being released.

The bottom line? Selenium can be healthy for humans in small doses – but concentrations can quickly add up, and improper disposal can endanger ourselves as well as the fish we eat.

(1) National Institute of Health http://ods.od.nih.gov/factsheets/selenium
(2) Agency for Toxic Substances and Disease Registry http://www.atsdr.cdc.gov/toxprofiles/tp92-c3.pdf
(3) Environmental Protection Agency http://water.epa.gov/drink/contaminants/basicinformation/selenium.cfm
(4) Environmental Protection Agency http://water.epa.gov/scitech/swguidance/standards/criteria/aqlife/pollutants/selenium/questions.cfm
(5) Nature’s Way http://www.naturesway.com/Products/Minerals/41081-Selenium-200-mcg.aspx

Steps Towards Solutions

The amount of oil that enters the marine environment from consumers (not producers like the oil companies) can be hard to estimate, and even harder to control. Often, reports will break down pollution sources into two broad categories:

Point-Source Pollution: This refers to discrete sources of pollution that can be directly identified, such as a factory that is dumping waste directly into a river. Huge strides have been made in the past decades by governments to curb these sources, though by no means has point-source pollution been eliminated yet.

Non-Point-Source (NPS) Pollution: Refers to pollution sources that are much harder to isolate and track. These would include run-off from roads, parking lots, farmers fields and industrial sites as well as improperly disposed of oil containers and the like which slowly leak out into the environment. A large portion of NPS pollution ends up in the sewer and storm drain systems of our communities, and flows untreated into our lakes and rivers. Since no one person or business can be blamed, NPS pollution is much more difficult to combat.

What is being done?
Responses to NPS fall into three broad categories: regulation, awareness and treatment. Examples of some bodies undertaking each of these are below, and we will take a closer look at some of these in posts to come.

Regulation:
Capital Region District (Victoria, BC) Bylaw No. 2922, SEWER USE BYLAW NO. 5, 2001

Awareness:
Massachusetts Department of Environmental Protection Fix Oil Leaks
City of Carlsbad (California) Storm Water Protection Program

Treatment:
Royal Victoria Yacht Club (Victoria, BC) Marina Wash Water Recycling
Metro Lexus Toyota (Victoria, BC) Storm Drain Protection

Do you know of another group that is regulating, promoting, or treating run-off to protect your rivers, lakes and oceans? Let us know!

Oil Spills – General Information

When people talk about oil spills, they often do so only in terms of large spills encompassing thousands of barrels of oil in a single incident. Visually striking, the images from these spills splash across newspapers, get extended attention on television shows, and often feature as the centerpiece of online articles. Unquestionably harmful to the environment, coverage of these catastrophes has over time created a false perception that these large spills are the primary threat, while less sensational reports which show that the big spills actually form the smaller portion of oil entering our rivers, lakes and oceans are generally ignored by media outlets trying to hold the attention of the public.

In truth, every drop of an oil product that escapes us will at some point end up contaminating the soil or being washed into the water systems around us. The cumulative effect of small leaks from cars, drips of oil from hydraulic cylinders on heavy machinery, the few drops we spill while fill up cars, boats and small appliances actually far exceeds the amount of oil released in big spills every year. To combat this, however, is not the glamorous fight of celebrities cleaning oil-coated animals or highly placed corporate executives being called before government committees – it requires instead that most difficult of fights: the fight to get a small amount of sustained effort from every individual, business, and level of government over a long period of time.

As an example, it is currently estimated that there are over 78 million storm drain inlets across North America. Each and every one of these provides a place where oil run-off from roads, parking lots and other structures can be carried directly into municipal sewer systems and onto our lakes and rivers – largely untreated, as most regions do not have infrastructure in place to deal with diluted oil in water.

Does the technology exist to protect these drains?
Yes.

Does it cost money to protect these drains?
Yes.

Are we willing to pay?
This is always the stumbling block to protecting our environment from ourselves – it is almost always cheaper in terms of time, money and effort to destroy, pollute and despoil than to protect.

What can I do about it?
First, be aware of what you do yourself – are you throwing out that empty bottle of engine oil with the trash, or disposing of it properly? Are you taking the extra few seconds of care to make sure you don’t spill a stream of gasoline when you fill your car?

Second, take the few minutes to find out what problems are worst in your community, and what groups are already trying to do to make a difference.

Finally, make sure that other people know you care about it. One person privately acting to clean up their habits will help, but one person being a visible role model to those around them can have a far greater influence.

Sources:

Smithsonian Institution’s National Museum of Natural History

Welcome!

Welcome to the blog for Oil Spill Defense, a website run by Petro Barrier Systems Inc of Sidney, Canada. Our aim here is to help people understand what can be in their water, where it comes from, and what risks it may pose.

While we make our business in the filtration and removal of many of the substances that we will be talking about on here, the purpose of our blog is to inform people about these potential hazards through quick, approachable summaries. We will be doing our best to provide links to our information sources whenever we post, so that anyone interested can track back to the origins of the article.

We hope that you enjoy our blog, and welcome your comments on what we post.

Thank you,
The Petro Barrier Team