Pollution Fighting Plants

Here’s an interesting post from a blog referencing pollution fighting plants……


Once the plant uptakes the contaminants what do you do with the organic matter of the plant?  Do you harvest it and landfill it?  Is the organic material contaminated (it says harmless byproducts above but what are they)?  Is phytoremediation a remedial plan that is used like a barrier to prevent contaminant groundwater migration beyond where the plants are uptaking the chemicals?  Trichloroethylene (TCE) is a dense non-aqueous phase liquid (DNAPL) and will likely reside deep into the aquifer…how deep do plant root systems go that can uptake the contaminants?  Can they extend through confining layers in the subsurface and reach the confined aquifer where DNAPLs might exist?  Or are they very limited to the shallow unconfined aquifer?

Cool idea as a long term attenuation approach to remediation or maybe as a risk mitigation measure…but might not be a practical solution for fully remediating a contaminated property.


Recycling Coke Bottles and Newspapers…Why Not Our Land?

What is “Brownfield Redevelopment”?  Its hard to explain what this is without putting someone to sleep so I will try to jazz it up a bit…think about the crappiest piece of derelict property you remember as a kid that might have seen being used as an old wrecking yard, factory or gas station…now envision it in your present local downtown streets, maybe next to your favorite Starbucks or a friend’s apartment.  All that’s left is a dusty skeleton of its past, maybe a few old condemned buildings left behind, a fence put up along its perimeter hopefully keeping the vandals out, a couple weathered signs that stay “No Trespassing”, garbage littering the ground…This could be potential Brownfield Property.

What makes these properties concerning is that they could have serious environmental concerns associated with their historical operations, which may pose a health and safety risk to the public.  However, when dealt with correctly these derelict properties are valuable as they may potentially be reused for another generation of business.

Maybe that vacant ‘dive of a property’ next to your favorite watering hole is redeveloped into a luxury condo building or a new university residence or maybe a nursing home or park.  All of which would be an overall improvement to the property, an increase in the tax base for the municipality, and possibly an increase in the surrounding properties real estate value.

If these old properties are contaminated, then they need to be cleaned up before they are reused for certain applications (i.e., an old commercial property into a more sensitive land use such as residential).  The process in which these properties are determined to be clean or dirty, and how they get cleaned up is the real challenge as there is regulatory red tape and hoops to jump through.

In a nutshell, in our Province of Ontario you cannot redevelop these types of properties for certain land uses without firstly obtaining what’s called a Record of Site Condition (RSC).  To get an RSC you must comply with the requirements of Ontario Regulation 153/04 (as amended, http://www.e-laws.gov.on.ca/html/regs/english/elaws_regs_040153_e.htm).   Its not an easy or quick process.  In the simplest of scenarios it can be somewhat costly and take a few months at least.  If not planned for correctly, it could result in a significant delay in development plans.

The process starts with what is called a Phase One Environmental Site Assessment (ESA).  This process is generally a desktop review of the property with the objective of determining if there is any actual or perceived contamination to the soil, groundwater or sediment on-site.  For example, during a Phase One, the person assessing the site would (as a small portion of the process) review historical building records or aerial photographs that might indicate the presence and location of underground fuel storage tanks or a gas station canopy.  These types of issues would be deemed as Areas of Potential Environmental Concern (APECs) and warrant needing a Phase Two ESA before you can get your RSC.  Without getting too specific, the Phase One ESA is a very detailed and thorough process which follows a specific set of criteria that is defined by the Ontario Ministry of Environment and Climate Change (MOE).

At the end of the Phase One ESA process, the assessor determines if any APECs exist.  If so, the project requires a Phase Two ESA to be completed prior to obtaining the RSC.  If no APECs are discovered during the course of the Phase One, the property owner can then file for an RSC within the MOE’s Brownfield Environmental Site Registry and becomes a public record.

If a Phase Two ESA is required to investigate the areas of concern (e.g., gas station underground storage tanks) some environmental testing is required.  The amount and type of testing is scripted by the MOE in the Regulation as well as what the assessor defines (the assessor is the person who is reviewing the condition of the property, also referred to as the Qualified Person (this needs to be a licensed Professional Engineer or Geoscientist)).  Phase Two activities may consist of a series of soil test pit excavations or boreholes using a drill rig with some groundwater monitoring wells.

Environmental soil and groundwater samples (and sometime sediment samples depending on where the property is located) are collected as part of the Phase Two process and analyzed at a laboratory for certain chemicals and parameters.  The lab data is then compared to criteria defined by the MOE.  This criteria is established by the MOE using toxicological human health and ecological information.  If the lab data analyzed from the samples collected from the property are greater than the established MOE criteria then there is so called ‘contamination’ on the property that needs to be dealt with prior to obtaining the RSC.  On the contrary, if all the samples collected during the Phase Two come back from the lab below the MOE criteria, the assessor has determined no further work is required to assess the property and the owner can file for RSC with the MOE.

There are a number of ways to deal with the contamination.  It can be dealt with through either various forms of remediation or through risk assessment, and in some cases a combination of both.  Once the contamination has been remediated or deemed safe to be left on-site through the use of a number of risk mitigation measures, and that all further sampling requirements have been met to satisfy the Regulation, an RSC can be obtained.  Once that RSC is obtained, the owner has satisfactorily met the requirements of Ontario Regulation 153/04, and can proceed with development of the brownfield property (barring all other municipal or regulatory requirements have been met).

There are a number of reasons why an RSC is or may be required.   I’ve only touched on one for the topic of this post (i.e., to redevelop a brownfield property for a certain use).  Phase One and Two projects and the work involved in obtaining an RSC are highly variable.  The objective of this post is only to provide a brief overview of the process only and is not intended to simplify or downplay this process.  It is recommended that significant consultation with all stakeholders is completed prior to taking on a brownfield redevelopment project (municipality, environmental consultant, property owner, MOE, etc.).

The costs and time to complete the process of obtaining an RSC can vary significantly from site to site.  Over the past few years I’ve seen the costs and timeframe to obtain an RSC under the most basic conditions be just below $10K and approximately 2-3 months from start to finish.  These projects are also known to range into the millions of dollars and extend over the course of a couple years.  These cases involve significant remedial efforts, risk assessment and lengthy review consultation periods with the MOE.

Although the work required to satisfy the provincial requirements for developing brownfield property can be onerous and costly if not planned and budgeted for correctly, these laws are in place for good reasons:

  • To ensure these properties are assessed correctly and fairly in order to adequately restore and evaluate the environment;
  • To bring new life to old, used and abused urban areas worth recycling for another generation and limiting urban sprawl; and
  • For the utmost reason, to protect human health and our ecosystem for the people who use these properties and for our future generations.

I encourage the development of brownfield property.  I think its an exceptional idea.  We recycle anything from our coke bottles to newspaper….why not our land?

Windfarm contaminates water

Is this article about windmills or is it about contaminated water?? It’s suggesting that THMs (trihalomethanes) are in the water supply and that they were created there as a result of the ground disturbance caused by a major windmill construction project near an area where highly organic soils are found. The organics mixing with the local chlorination system and the resulting effect is the elevated THM concentrations found. I would think that if this were true that we all should be concerned about any large construction project near a potable groundwater supply under these specific soil conditions. Correct me if I’m wrong but this article doesn’t identify the location or proximity of the well head protection areas in elation the the wind farm construction activities….so it is leaving me some idea of ‘missing facts’…

It seems here that there might be a lot of assumptions being made possibly leading to finger pointing and illegitimate accusations without having going through a detailed hydrogeological assessment to confirm these findings. Nonetheless there is certainly the possibility which shouldn’t be ignored.

I like this article because it’s controversial and brings up a lot of interesting questions to think about. Where I’m from (Sault Ste. Marie, Ontario) we have our third wind farm being built plus several very large solar farms. Not to mention several other large local development/construction projects being completed over the past few years. Albeit some of these large construction projects may not be within our groundwater recharge zones and have no bearing. Nonetheless over the past recent years our local water utility company has switched to a chlorination system which has resulted in significant discolouration of our water supply in certain areas of the city. Is there THMs in our water supply? Is our soil in the Sault highly organic and susceptible to causing a similar situation as found in this article? Does anyone know or have looked into this? Environmental food for thought….

World Council for Nature

Doctor claims Scotland’s biggest windfarm has contaminated public water supply with cancer-causing chemical

Backbone Mountain  - Tucker County - West Virginia
The implantation of a wind turbine causes a significant impact on the land, on nearby water courses (sedimentation etc.) and on the water supply (filtrations into the soil). This particular picture is from the US.

“The radiologist, 58, said: “I obtained test results in 2013 from East Ayrshire Council and discovered that our water had been grossly contaminated with E.coli bacteria.

“That was bad enough but I am far more concerned about the presence of THMs in the public supply.

“We are drinking the stuff now but all the medical advice is that the effects may not be seen for 10 or 20 years.”

“Last week, MSP Graeme Pearson met Scottish Water’s director of strategic customer service planning, Professor Simon Parsons, to discuss Dr Connor’s findings.

“He said: “Dr Connor has identified that higher levels of cancer…

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The first post!

When someone asks me what I do for a living I usually just politely tell them that I clean up gas stations and leave it at that…its seems like the general public has been aware of property environmental contamination long enough to understand that these types of people exist and I’m one of them.  It can be hard to explain to people what I do, its even harder to explain why I like it and how it keeps me interested…I’ve been online seeking someone or something like me that would share this same passion or at least be putting some relevant and interesting information out there about environmental engineering in a cool and exciting way to keep my attention for longer than 5 minutes.  So far no luck…in hopes of finding that special group of people I intend to put myself out there by creating these posts in order to attract some discussion and to share what I have learned with the intention to bring some insight into the industry.

Environmental engineering is a broad term used to describe a relatively niche field of work…so at this time, to be specific I will focus this blog and my posts on what I am most familiar with and what I know best…’contaminated sites and remediation’.  What I like about these projects is that they are all different.  They all tell a different story.  And at the end of the day, most of my projects usually end up in doing some good, either by helping someone out with their business goals or by cleaning up the environment, and more often than not a combination of both.

Some of the work I do also comes with a bad stigma.  There are a lot of people out there who have heard those classic environmental horror stories about businesses going broke to clean up their property…some of them might be true, most of them are exaggerated.   I hope I can shed some light on these situations for everyone, clear up that stigma, and speak the honest truth through my experiences….

I tend to write too much in general so I will keep my first blog short!  More to come…stand by…