Communal Fracture: Concerned Citizens of Western Pennsylvania React to the Various Impacts of Marcellus Shale Fracking on their Communities
By Nate Natale
The majority of FracTracker’s posts are generally considered articles. These may include analysis around data, embedded maps, summaries of partner collaborations, highlights of a publication or project, guest posts, etc.
By Nate Natale
By John Stolz, PhD – Duquesne University, Department of Biological Sciences
The Marcellus Shale represents one of the largest reservoirs of unconventional natural gas in the world.It holds the potential, like other gas and oil reserves, to provide a source of energy and jobs for Maryland. It’s extraction, however, is non-trivial and if done without proper safeguards can result in the degradation of water and air quality, and loss of land use. Over the past year I have had to opportunity to observe ongoing natural gas well activities in Western Pennsylvania, attended public hearings,spoken with disaffected individuals, gas company representatives, and people from other states with gas drilling activities. I would like to share with you some of my observations.Shale gas is called “unconventional” because the gas is trapped in the rock and needs to be extracted.The process, called hydraulic fracturing, involves a mixture of water, sand, and chemicals that are injected into the group at very high pressures (~10,000 psi). Each “frac” may require up to 5 million gallons of water. In Pennsylvania, this water is withdrawn from lakes, streams and rivers.
The large volumes of water are transported to a developing “play” by water trucks and deposited in large impoundments. These impoundments can be several acres in size and hold millions of gallons of water. A typical water truck may hold 4,500 gallons, so it takes several hundreds to thousands of truck trips to fill an impoundment.
The depth of the Marcellus Shale is between 5,000 and 6,000 feet below the surface in Western PA,thus a larger drilling rig is needed. A unique feature of these wells is that they are “horizontal” and may extend outwards several thousand feet in several directions. This is needed as the formation is relatively thin (~150’) in most places. A well pad may have 6 to 12 well heads. Each well produces~1,000 tons of drilling waste (ground up rock and drilling mud) that may contain a variety of salts, heavy metals, and naturally occurring radioactive material (NORM). This drilling waste may be buried on site or, more usually, transported to a land fill.
The well pad itself is 4-6 acres, in order to provide space for the trucks and containers, and impoundments for drilling mud, waste, and fracking. Once the horizontal has been drilled and cased, it is “fracked”. This process involves many vehicles, containers of sand and chemicals, the mixing trucks with fracking chemicals, and the diesel compressors (~200 vehicles). Hence the need for more space than a conventional well. During completion, the well is usually flared.
A completed well pad will typically have several well heads (the “Christmas tree), separators, small compressors, and condensate tanks (to handle the produced water). As long as a well pad is active (the well can be restimulated or used to drill a deeper formation), the footprint is still 4-6 acres. Depending on the number of wells, there may be as few as two condensate tanks or many more. They are sources of volatile organics as they are designed with “blow off” relief valves. Invisible to the naked eye these volatiles can be seen with specially designed infrared cameras.
The amount of produced water may also vary. For Marcellus, the initial flow back has been only about10 to 20% of the amount of fluids that were injected. Over time this “produced water” increases in total dissolved solid (TDS) content. The “brine” can be ten times saltier than seawater, contain high concentrations of bromide, chloride, strontium, and barium, as well as arsenic and uranium. In Pennsylvania, while the condensate tanks have hazard placards indicating the toxicity and flammability of the flow back water, the truck only is labeled “residual waste” and “brine”. Publicly owned wastewater treatment plants (POTWs) are allowed to take up to 1% of their total daily output. In Pennsylvania, there are currently at least 63 POTW’s permitted to take produced water. POTWs are not designed to“treat” produced water but merely dilute the salts.
This has resulted in increases in total dissolved solids(TDS), bromide in particular, in local rivers. The increase in TDS and bromide has caused problems with public drinking water facilities as the disinfectant process (chlorination) creates trihalomethanes (TMH, bromoform and chloroform). As a result many public drinking water facilities in the area have had to convert from chlorination to chloramination to reduce the formation of THMs. However, chloraminated water can cause the leaching of lead from older pipes and fittings. And there will be spills. Over the past 2.5 years, the PA-DEP has cited the industry with over 1,600 violations. Many of these were for improperly constructed impoundments, chemical spills, and surface contamination.
There are other aspects to the industry as well. Methane is a colorless, odorless gas, that needs to be odorized with mercaptan. The product from the Marcellus in Western PA is not dry gas but a combination of other organics as well. Thus the gas needs to be “dried” in refineries. Propane and butane are “cryo” separated in these facilities. These complexes are a source of volatile organic compounds and are frequently flaring off residual organics. They are also flanked by compressor stations that pressurize the gas for the pipeline.
The industry can move very quickly as has been recently demonstrated in Hickory-Houston, PA area,where since 2005 there are now over 80 well pads, impoundments, compressor stations, and other gasfacilities within a five mile radius.
The extraction of unconventional natural gas is heavy industry involving large tracts of land, heavyequipment and vehicles, and an extensive array of pipelines, compressor stations, and processing facilities. The level of surface disturbance is extensive, as has been demonstrated elsewhere (e.g.,Colorado, Wyoming, Texas, Arkansas, Louisiana). Existing industries such as agriculture, tourism, outdoor ventures (e.g., fishing, hunting, and camping), and wineries, will be lost or significantly impacted. In Pennsylvania there have already been loss and contamination of well water, and loss of livestock and quarantined herds after exposure to contaminated water.<
Water
Land usage
Exposure to toxic chemicals (spills, aquifer contamination)
Traffic and road degradation
Noise
Air pollution
Property devaluation
EMS and emergency procedures
Increases taxes to cover infrastructure damage, additional public services and security.
John F. Stolz, Ph.D.
Professor, Department of Biological Sciences
Director, Center for Environmental Research and Education
Duquesne University
Pittsburgh, PA 15282
Updated Marcellus Shale well production data for the period between July 1, 2010 and December 31, 2010 is now available on the DEP website and FracTracker’s DataTool. This data is self-reported by the drilling operators, and includes production in the following categories:
Let’s take a look at some of the numbers.
Table 1: Production notes and values for Pennsylvania Marcellus Shale wells, July 1 2009 to June 30, 2010
Table 2: Production notes and values for Pennsylvania Marcellus Shale wells, July 1 2010 to December 31, 2010
Although gas production is the focus of the six month production report, there is enough useful data to learn a few other things about the industry as well:
Table 3: Gas, condensate, and oil production values for Pennsylvania Marcellus Shale wells, July 1 2009 to June 30, 2010
Table 4: Gas, condensate, and oil production values for Pennsylvania Marcellus Shale wells, July 1 2010 to December 31, 2010
The Marcellus Shale is well known as a gas producing black shale formation, but condensate and oil are also produced from these wells in Pennsylvania. There are a couple of trends of note here as well:
Now let’s take a look at the geographical distribution of this data. Here, in rapid succession, are the data in table, chart, and map formats:
Table 5: Pennsylvania Marcellus Shale production by county, July 1, 2010 to December 31, 2010
Chart 1: Pennsylvania Marcellus Shale gas production by county, July 1, 2010 to December 31, 2010
PA Marcellus Shale Oil, Gas, and Condensate Production, July 1, 2010 to December 31, 2010. Please click the gray compass rose and double carat (^) to hide those menus.
There are a couple of key points about the location information as well:
Marcellus Shale natural gas, condensate, and oil production in Southwestern Pennsylvania, July 1, 2010 to December 31, 2010
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Table 6: Natural gas produced by operator in Pennsylvania’s Marcellus Shale formation, 7-1-10 to 12-31-10.
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Chart 2: Natural gas produced by operator in Pennsylvania’s Marcellus Shale formation, 7-1-10 to 12-31-10.
The leading producers in the state by operator are (percentage of statewide total in parentheses):
By Samantha Malone, MPH, CPH – Communications Specialist, Center for Healthy Environments and Communities (CHEC), University of Pittsburgh Graduate School of Public Health (GSPH); Doctoral Student, GSPH
Natural gas industry violations since 2007. Avella, PA can be found by clicking on the image and then zooming in on the patch of violations in the center of the map. Map created using FracTracker’s DataTool. |
On February 23, 2011 a section of a natural gas drilling site in Avella, PA caught fire. Luckily only three workers were injured, but the issue still hits close to home – literally. Avella is my hometown. This quiet, farming area is located roughly 35 miles southwest of Pittsburgh in Washington County, PA. (See the map to the right.) It has a large school district geographically, with a tiny population. Known primarily for its rolling hills, farmland, and a historic landsite called Meadowcroft, Avella very rarely makes the headlines in Pittsburgh. That very fact is what peaked my concern when a TV news program mentioned that an incident had occurred on a Chesapeake Energy well site there.
The PA Department of Environmental Protection is currently investigating the fire. Initial reports indicate that volatile vapors that escaped while workers were flow-testing (part of which involves separating the flowback fluid from the natural gas), ignited and then caught nearby tanks on fire. Volatile vapors can include a number of constituents, such as propane and benzene, which is a known human carcinogen. While there is little evidence to suggest that water contamination occurred as a result of the accident (like the 2009 spill near Cross Creek lake), air quality was most definitely affected. The smell of chemicals burning during the fire was even reported by some nearby residents. Thankfully, based on witness and on-site reports, the cooperation between the various emergency responders meant that the fire only burned for about three hours.
On a side note, I find it interesting that Chesapeake immediately refuted reports that hydraulic fracturing was the cause of the fire. Hydraulic fracturing, a process that breaks apart the shale layer under the ground to release the gas, had apparently been completed on the site. However, the volatile vapors originated from condensate, a result of hydraulic fracturing. Semantics.
Postmark Deadline Entry: March 15, 2011
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Extent of 2009 Dunkard Creek Fish Kill |
It is said that the living can freely move on only when they have helped the newly dead rest in peace. Reflections is a collaborative installation by more than 100 artists to commemorate the lives of the 116 species who perished in Dunkard Creek during the warm days of late summer 2009. The creek literally died when a fatal combination of chemical mine wastes and low water, exacerbated by “frac” drilling water withdrawals, set off the bloom of an alien toxic algae, suffocating an estimated 18,000-22,000 animals.
The forty-three mile Dunkard Creek meanders across the Pennsylvania and West Virginia state lines before it flows into the Monongahela River, recently listed as one of America’s 10 most endangered rivers. The Monongahela River supplies drinking water to 850,000 people.
Water is an age-old symbol for purity, clarity, and calm. The artists participating in Reflections are united by a common body of water, the Monongahela Watershed. To honor the tragedy that befell this watershed, each artist will ‘adopt’ and memorialize one of the 116 species of animals who perished, to celebrate the life of that species with an original work of art.
Reflections is open to practicing artists over 18 years of age living on, near, or connected to the Monongahela River Watershed (the area where the water under it or draining off of it goes into the Monongahela River).
Open to traditional or non-traditional media (e.g. painting, drawing, print, collage, etc., but no photography) applied to a 7”x10.25” sheet of 140 lbs Arches hot press paper mounted with archival gel to a hardboard panel (provided by organizer).
Completed applications, a brief bio, and $25 entry fee must be received no later than March 15, 2011. Upon application, artists will be randomly matched to a species. (Species cannot be reassigned.) The application process will close when all 116 species have been assigned. Completed work must be submitted by August 1, 2011.
To request the application form or if you have questions, please contact Ann Payne at 304.292.7673 or Paynestake@frontier.com.
Mixed total of waste produced by Marcellus Shale gas wells between July 1 and December 31, 2010. For more information on specific wells, click the blue “i” button, then click on one of the purple dots.
Self reported Marcellus Shale waste data for the period between July 1 and December 31, 2010 is now available on the DEP website and FracTracker’s DataTool in the following categories:
I have also pivoted the data to establish how much waste is transported to the various disposal locations.
Locations accepting Pennsylvania’s Marcellus Shale waste. Please click on the gray compass rose and double carat (^) to hide those menus.
I have a few initial observations about the waste production data:
By Conrad Dan Volz, DrPH, MPH.
Director and Principal Investigator of the Center for Healthy Environments and Communities
Management Plans by the Pennsylvania Fish and Boat Commission (PFBC) have been released for public comment for the 3 major drainages in Pennsylvania:
Public meetings on each of these draft plans are underway and dates and times and places of future meetings for each basin are now available on the PFBC website.
The PFBC has as its goal of these management plans – to protect, conserve and enhance the aquatic resources of and provide fishing and boating opportunities. The PFBC also has an important role in investigating releases of brine water from oil and gas extraction operations. Mr. John Arway the Executive Director of the PFBC just published in the January / February Edition of Pennsylvania Angler and Boater a very sobering assessment of water withdrawals and permitted pollution of Pennsylvania waterways by NPDES permit holders. He states that end users of municipal water are paying increased costs for water purification because of companies that are allowed to pollute receiving waters. This is a very courageous statement and I concur wholly with him on this. His complete statement can be found here.
Below are presented excerpts from the PFBC Draft Three Rivers Management Plan that pertains to Marcellus Shale gas extraction. Most important is their statement in the draft plan that in 2008, several wastewater treatment plants located along the Monongahela River were accepting frac-flowback water from multiple sources. Unable to completely treat this water, plant outflows caused a temporary spike in conductivity (readings as high as 1,200 μS/cm) and total dissolved solids (TDS readings as high as 900 mg/L) in the Monongahela River during October and November 2008. Other passages related to Marcellus are:
Three Belt Thickness of Devonian Black Shales. Click image for a larger dynamic view.
Three datasets from the Pennsylvania Department of Conservation and Natural Resources (DCNR) have been added to FracTracker’s DataTool. Each dataset indicates the thickness of a major carbon-rich black shale layer from the Devonian Period in Pennsylvania, including the Marcellus, Rhinestreet, and Huron.
The thickness in feet of the Marcellus Shale. Click the gray compass rose and double carat (^) to hide those menus.
The thickness in feet of the Rhinestreet Shale. Click the gray compass rose and double carat (^) to hide those menus.
The thickness in feet of the Huron Shale. Click the gray compass rose and double carat (^) to hide those menus.
For an interesting cross-section view of Northwestern Pennsylvania rock formations visit this link from the DCNR website.
While anyone with a registered user account can put data up on FractTracker’s DataTool, sometimes finding and collecting relevant data in a usable form is more difficult than it should be. I have examined datasets from a wide variety of places (1) and agencies, and after encountering numerous issues, I have devised a grading scheme to reflect the quality of the data being distributed, to be known as the Data Accessibility and Usability Index (DAUI).
The DAUI considers variables in the following seven categories:
Data Accessibility and Usability Index grading scheme, 100 total points. Scroll to the right to see additional categories.
It is important to note that each grade given represents only one specific dataset at one point in time. On occasion, certain aspects of any given dataset are updated by the agency controlling the data, hopefully for the better.
One recent example is the Pennsylvania drilled wells (spuds) database. Until recently, this was published on HTML tables on a monthly basis, but 2011 data is now available in a single Excel file. In addition, this year’s wells have location information, which was missing from previous years data. Although PASDA maintains a list of about 125,000 oil and gas locations in the Commonwealth directly from the DEP, there were still thousands of wells that didn’t match in the years between 1998 and 2010.
Since the new dataset in Pennsylvania only covers 2011 wells so far, it is appropriate to grade both datasets separately. This will also serve as a functional example on how the DAUI works.
Grades for PA DEP’s Drilled Wells Dataset. Scroll to the right for additional grades and total scores.
As you can see, the two changes that they have made have bumped the PA DEP’s grade up from a D- to a solid A. And in fact, the D- might have been generous. Several of our DataTool users have suggested that there might be significant omissions in the older report, but I have never been able to conclusively establish that as a fact. If it is true, the Accuracy rating would fall from 10 to 0, leaving a total score of 50 for that database.
Let’s look at another example, Wells in Quebec near the St. Lawrence, published by Quebec’s bureau d’audiences publiques sur l’environnement. To get the data up on FracTracker, the data had to translated to English (not a demerit, just a step in the process), copied from the PDF file to Excel and pasted so that each column of data fit on one cell. Then the data could be distributed using the space (“ “) as a delimiter, at which point the cells needed to be manually aligned to allow for proper concatenation. Once all of that was done, it was necessary to change the location information from Degree Minute Second format to Decimal Degree to be able to map the data. Finally, the units of measure for depth were mixed, including both meters and feet, which should be consistent. In short, not a very satisfactory experience with the data. Here’s how it grades, based on that experience:
Grade for Quebec’s bureau d’audiences publiques sur l’environnement Wells in Quebec near the St. Lawrence dataset. Scroll to the right for more grades and total score.
Despite my frustrations with this data, the information is published on the agency’s website, appears to be complete, and is well explained. The issue of publishing this dataset on a PDF (which cannot directly be analyzed) was the main result for the agency’s C grade.
Here’s the grade for a dataset that I can’t post: The Railroad Commission (RRC) of Texas’ Newark East (Barnett Shale) gas wells.
Clearly, the RRC is in possession of a tremendous amount of data. You can click on the “Well log” link and see dozens of pages of scanned original documents. However, there are a couple of problems with this data which makes in unusable for FracTracker. First of all, there are over 8,000 records, but it is impossible to view more than 100 at a time. Those would have to be copied and pasted manually from the HTML tables. While that is possible to do, it isn’t worth the effort, because there is no location information. Knowing that they must be able to produce an Excel sheet with some basic data about their drilled wells, I contacted the RRC, and was told that what I wanted could be obtained…for a cost. In my opinion, the RRC is being stubborn on this. They have terrific data, and yet they do everything they can to be (politely) difficult. As I did not elect to purchase data at this time, I will only grade what is available online.
Grade for the Railroad Commission of Texas’ Newark East (Barnett Shale) Drilled Wells dataset. Scroll to the right for more grades and the total score.
Because they elected not to release the data upon request, the RRC earned a failing grade. Had the RRC simply created and sent the proper Excel file from their database, they might have earned 90 points on the DAUI. If they had decided that well location information was a basic thing that citizens might want to know, and posted a downloadable link on their website, they could have full marks. If the for-cost version of the data has everything that is desired, it would have a maximum score of 80, because it was not free and had to be requested.
These three examples show how the DAUI system works. In the near future, I will grade all relevant oil and gas datasets against the same metric. Hopefully, a comprehensive picture of the various agencies that control oil and gas data will emerge.
Scoring 100 points on the DAUI should be attainable, almost 100 percent of the time. If governmental agencies really do not have data on wells, permits, violations, and production, then they are failing their respective citizens, whose lives are affeted by the oil and gas industry, often quite profoundly. If the agencies that control the data simply are in the habit of making it difficult to access, then I must remain hopeful that they will be pressured to realize that is an unacceptable strategy for the 21st century.
The Pennsylvania DEP now has a linkto download all of the drilled wells from the Spud Report in Excel file format (1). This is a major upgrade over their previous system of posting online tables for each month, not only for the ease of access, but also because it contains complete location information, which previously had to be obtained elsewhere by matching the American Petroleum Institute (API) number with an external dataset; an imperfect system which resulted in thousands of wells between 1998 and 2010 for which location information could not be found.
Drilled wells in Pennsylvania in 2011. Click the gray compass rose and double carat (^) tabs for a complete view.
In addition, it utilizes the full API number. For example, in well number 37-005-30663-01-01, the initial 37 is the state code for Pennsylvania, and the 005 is the county code for Armstrong County.