How to Remediate a Large Release of Produced Water
Authored by: George A. Tyers, PG
Produced water is water that comes out of a well during the extraction of oil and natural gas. The chemistry of produced water varies depending on the subsurface rocks it has been in contact with, but is typically saline, often many times that of seawater. Other major constituents of concern may include oil residues, naturally occurring radioactive materials (NORM), chemical additives used in drilling and fracking, and other dissolved organic and inorganic compounds.
The actual composition of produced water will determine how it is managed (e.g., recycled, treated and discharged, re-injected). However, when untreated produced water is uncontrollably released, it often results in environmental conditions requiring expensive cleanups under state and/or federal regulations. These releases are often the result of equipment failures, operator errors, pipeline strikes, surface spills, and infrastructure damage from extreme weather events such as lightning strikes.
State requirements vary, but typically releases must be cleaned up to standards for various constituents. The main drivers for remediation usually include chlorides, total petroleum hydrocarbons, benzene, and NORM.
Insurance Carrier Case Study
Recently, Roux was retained by an insurance carrier to respond to an incident where an insured accidentally damaged a surface pipeline associated with a salt-water disposal facility, causing a large release of produced water that impacted an extensive area in a remote region of the southwest United States. Complicating the remediation was the presence of numerous underground pipelines that crisscrossed the work area.
The depth of contamination was a significant cost-driver due to the anticipated quantity of soil to be removed. Initial estimates were in excess of $500,000 to remove and dispose of impacted materials. Ultimately, Roux was retained to evaluate the remedy and design and implement a cost-effective remedial strategy. To reduce costs, Roux relied on existing field and lab data that was collected by the emergency response contractor to delineate the extent of contamination and prepare a remedial action plan that was approved by the state regulatory authority.
To further reduce costs, Roux relied on extensive field screening methods to limit the excavation and quantity of soil removed. Laboratory analysis was used to verify field screening measurements. Ultimately, about half as much soil was removed for off-site disposal than was originally planned, resulting in a significant reduction of waste and overall remediation cost.
What can Roux do to help?
From a claims perspective, Roux can evaluate contractor work scopes, make cost-saving recommendations, and provide expertise in evaluation of the remediation costs incurred and whether they are considered reasonable and customary. Roux can also combine our engineering, scientific, and insurance experts with our remediation subcontractors to provide a cost-effective remedial program to address the complex issues associated with addressing chloride, petroleum, and NORM contamination at salt-water disposal sites. To connect with one of our experts regarding these issues, please contact us below.
