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  • What’s the difference between air sampling and air monitoring?

    Air monitoring and air sampling are two different methods of looking at air quality. Air monitoring uses electronic devices to provide real-time readings of contaminants in the air. Air sampling involves trapping air over a period of time in a container that is then sent to a laboratory for analysis…

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  • What is EPA’s role in sampling?

    EPA is part of the Unified Command consisting of different agencies to review, approve and direct Norfolk Southern’s workplans and site activities. Surface water sampling is performed by Norfolk Southern contractors, with EPA and Ohio EPA oversight. Soil sampling is performed both by Norfolk Southern contractors and EPA contractors. Air…

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  • What is the plume map and what does it tell us?

    The plume map is an “event reconstruction” based on known weather and on-site observations during a 10-hour time period after the vent-and-burn operation that occurred on Monday, February 6. It tells us where soot likely fell to the ground and where the highest concentrations of particles may be. This information…

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  • Visit and examination requirements for SPCC self-certification

    Pursuant to 40 CFR §112.6, the owner or operator of a facility that meets the criteria in §112.3(g) for either a Tier I or Tier II qualified facility may self-certify the facility's SPCC Plan. As part of the self-certification, the owner or operator must certify that he or she has…

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  • What is split sampling?

    Split sampling is a technique where multiple samples are collected from the same location at the same time and then sent to separate laboratories for analysis. Checking to see if the labs get the same or similar results is a way to determine the accuracy of the data. If there…

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  • What work happens after contamination under and between the train tracks is removed?

    After track work is complete, additional cleanup and assessments will continue. This includes shipping solid and liquid wastes off-site, excavating in areas where rail cars were staged and scrapped, and sampling and monitoring groundwater, soil, surface water, and sediment.

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  • Availability of electronic SPCC Plan template

    Part 112, Appendix G to prepare an SPCC Plan. Is the Tier I qualified facility SPCC Plan template available in an electronic version? EPA has made available electronic versions of the Tier I qualified facility Plan template to help the owner or operator of a Tier I qualified facility develop…

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  • Columbiana County Health District has sampled my private well, will it be sampled again?

    Residents will be contacted if they are within the priority zones and have signed up for private well sampling. Within 60 days after the first sample, private wells are resampled, and residents will be contacted to schedule resampling. Residents within one of the four priority zones can also schedule a…

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  • What is the East Palestine Potable Water Sampling Work Plan?

    In February, EPA required Norfolk Southern to investigate drinking water sources through a work plan approved by responding agencies. The work plan is being used to monitor drinking water near the derailment site, and recently changed to include more areas for water sampling. These new areas were chosen based on…

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  • Tier I qualified facility template use under Part 112

    In the 2008 Amendments to the SPCC Rule, EPA provided a template for the owner or operator of a Tier I qualified facility to create an SPCC Plan. Does EPA require a Tier I qualified facility to use the template in 40 CFR Part 112, Appendix G? Does EPA allow…

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  • Difference between an SPCC Tier I and Tier II qualified facility

    In the SPCC regulations in 40 CFR Part 112, what is the difference between a Tier I and Tier II qualified facility? How did EPA establish the multi-tiered approach for qualified facilities? A Tier II qualified facility is one that has an aggregate aboveground oil storage capacity of 10,000 U.S…

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  • What was the “opt-out” provision and when was it revoked? 

    Answer: On April 22, 2010, EPA issued a final rule revoking the opt-out provision of the 2008 RRP Rule. The rule was published in the Federal Register on May 6, 2010, and took effect on July 6, 2010. As originally published in 2008, the RRP Rule allowed homeowners to "opt…

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