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BAP

Lead levels updated for remediation

HomeNews and InsightsTransforming perspectives on complex sitesLead levels updated for remediation
  • News and Insights
    Toggle Section
    • Transforming perspectives on complex sites
      Toggle Section
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      • Energy & Resources
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      • Groundwater Quality Monitoring at CCR Units
      • California children affected by lead poisoning
      • Water Recycling Fund Program
      • Upgrading Kangaroo Creek Dam
      • Complying with industrial stormwater planning updates
      • EPA 2017 Stormwater Construction General Permit
      • Filtering microplastics
      • Lead in Drinking Water
      • Permitting for industrial stormwater discharge in Illinois
      • Storm Water Grant Program (SWGP)
      • Water Recycling Fund Program
      • Microgrid in WA
      • EPA 2017 Stormwater Construction General Permit
      • Permitting for industrial stormwater discharge in Illinois
      • Court upholds emission monitoring for oil and gas
      • Storm Water Grant Program (SWGP)
      • Enabling electricity evolution
      • Groundwater Quality Monitoring at CCR Units
      • Infrastructure owners face change
      • Proposed emission reductions for oil and gas
      • Underground storage closure requirements
      • US Congress votes to lift US oil export ban
      • EPA 2017 Stormwater Construction General Permit
      • Managing Outrage
      • Groundwater Quality Monitoring at CCR Units
      • Lead in Drinking Water
      • Proposed emission reductions for oil and gas
      • USEPA intends to expand the Risk Management Program
      • Transforming perspectives on complex sites
      • Complying with chemical data reporting
      • Risk Assessment and Toxicology Update On TSCA Reform
      • Court upholds emission monitoring for oil and gas
      • California Organics Diversion Regulatory Update
      • California children affected by lead poisoning
      • Change Notification to ISO 14001:2015
      • Task force recommendations for expedited site cleanup
      • Proposed Revisions to Site Remediation MACT
      • New Ontario online registry for environmental permits
      • Federal guidance released for human health risk assessments
      • Revised UST regulations
      • Lead levels updated for remediation
      • Remediation guidance for adaptive site management
      • USEPA intends to expand the Risk Management Program
      • New toxicity values for EPA screening calculator
      • TSCA Reform is on its way to become a law
      • New Strategy for Waste-Free Ontario
      • Final ruling issued on exposure to Crystalline Silica
      • Fill and Excess Soil Regulatory Update
      • EPA 2017 Stormwater Construction General Permit
      • Future of Western Sydney
      • USEPA Vapor Intrusion Technical Guide
      • Hazard awareness training for demolition services
      • Big Data
      • Digital Technologies
      • Digital Disruption
      • Canada hosts international forum on public private partnerships
      • Public private partnership forum examines lessons for transit
      • New Strategy for Waste-Free Ontario
      • Hazard awareness training for demolition services
      • Complying with chemical data reporting
      • Fill and Excess Soil Regulatory Update
      • Project Management for Large Transport Projects
      • Public private partnership forum examines lessons for transit
      • Canada hosts international forum on public private partnerships
      • Transforming perspectives on complex sites
      • Risk Assessment and Toxicology Update On TSCA Reform
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      • How major rail is keeping pace
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EPA Regional Screening Levels Updated to Incorporate New IRIS Toxicity values for Benzo(a)pyrene and the Trimethylbenzene isomers

Late in the day on June 21, 2017, the United States Environmental Protection Agency (EPA) released its updated Regional Screening Levels (RSLs) for use in initial data screening of soil and groundwater for potentially significant human health exposures at contaminated sites in the US (e.g., CERCLA sites). This update included incorporation of EPA's January 19, 2017, and September 9, 2016, Integrated Risk Information System (IRIS) program's final assessment of benzo(a)pyrene (BaP) and the trimethylbenzenes (TMB). These final toxicity values from EPA's IRIS have the potential to reduce the need for remediation of BaP, and other carcinogenic polycyclic aromatic hydrocarbons (PAHs), and TMBs.

These updated tables include the higher criteria for BaP and TMB reported by GHD on February 22, 2017 on our website. 

The RSLs can be found onilne here.

Updated Non-Residential Soil Lead PRGs using EPA Update to the Adult Lead Methodology's Default Baseline Blood Lead Concentration and Geometric Standard Deviation Parameters

On May 17, 2017, the United States Environmental Protection Agency (EPA) completed an Update to the Adult Lead Methodology's (ALM's) Default Baseline Blood Lead Concentrations and Geometric Standard Deviation Parameters (OLEM Directive 9285.6-65) based on the most recent six years of data (2009-2014) from the National Health and Nutrition Examination Survey (NHANES). The revision to these parameters slightly lowers EPA's Preliminary Remediation Goal (PRG) for non-residential soil exposure from 2,737 mg/kg to 2,518 mg/kg. The memorandum also confirms that EPA has not updated its target blood lead level of 10 µg/dL.

This updated criterion has the potential to slightly increase the need for remediation of lead in soil. This criterion differs somewhat from the generic non-residential screening levels in EPA's Regional Screening Levels (RSLs), which uses the baseline blood lead concentration and geometric standard deviation parameters from the NHANES based on data from 1988 to 1991 (also known as NHANES III).

How can GHD help?
Please contact a GHD Risk Assessor for more information on how these RSLs and PRGs integrate into your environmental investigation and to help determine the most appropriate path forward to optimize environmental investigation or cleanup at your site.

For more information, please contact:
Francis C. Ramacciotti | Associate, Risk Assessment Services
1140 Welsh Road, Suite 120, North Wales, PA 19454
E: francis.ramacciotti@ghd.com | T: +1 215 853 3281

Steven Harris | Principal, Risk Assessment Services
651 Colby Drive, Waterloo, ON N2V 1C2
E: steve.harris@ghd.com | T: +1 519 884 0510 ext 3513

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