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  • Where can I find older NEI data (prior to 2008)?

    The raw data and summaries that are still available (dating back to 1990) can be obtained from the web page https://www.epa.gov/air-emissions-inventories/pollutant-emissions-summary-files-earlier-neis . Starting with 2001 data, a more limited selection of summary files are available.

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  • Can I leave my car or other vehicles on my property while I am away?

    The cleaning team will need workspace outside of your home or place of business to set up trailers and equipment. If it is determined that your vehicles need to be moved, you should arrange to temporarily remove them from your property.

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  • What happens to my belongings during the cleaning?

    The items you leave on your property and inside your home or place of business will remain where you left them and will not be removed.

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  • What do I do with my indoor plants during the cleaning?

    You may leave plants on your property and inside your home or place of business. However, the cleaning team will not move any of your belongings, including plants. You may want to consider moving plants outside for the day, if possible, and watering them before you leave.

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  • Are biogenic emissions included in the emissions trends Tier 1 data?

    No, the biogenic emissions are not included in the emissions trends Tier 1 data. If needed, users can add the biogenic data either as a separate Tier, or specify its inclusion in the “Miscellaneous” Tier 1 group.

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  • What do I have to do in preparation for the cleaning?

    Cleaning crews will not move any of your personal belongings, including furniture or appliances. To ensure the most thorough cleaning of your home or place of business, please clear countertops and other surfaces, and limit excess clutter. Norfolk Southern will provide a few boxes if needed to allow for easy…

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  • What happens if any of my items get damaged during the cleaning process?

    If any items get damaged, an independent appraiser will estimate the value of the item by using the videos and photos of your belongings to determine a fair value for the item that needs to be replaced. The assessment will then be presented to you for your approval. If you…

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  • What should I do with food items?

    Any food in your kitchen cabinets and refrigerator/freezer that you will not need while you are away can be left in place. This includes items such as spices, canned, boxed, and bagged foods, and refrigerated/frozen foods. Before you leave your home or office, please be sure to empty all garbage…

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  • How do I know that my belongings will be safe during the cleaning?

    Before the team begins cleaning, they will videotape each room and photograph the items you left. The videos and photos provide a record of the items that were present and the conditions of those items at the time the cleaning team entered your structure. An EPA representative will be present…

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  • What sources make up the Sectors or Tiers used in the emissions data summaries?

    Tier 1 and Sector categories are assigned by source classification codes (SCCs) that are the most specific processes available in the NEI. The latest SCC list with the Tier 1 and Sector assignments can be downloaded from the EPA SCC website in Comma Separate Values (CSV) format.

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  • Will someone explain the process to me so that I can decide if I want cleaning?

    During your pre-cleaning interview, representatives from EPA and Norfolk Southern will explain the cleaning process, assess time and resource needs, answer questions, and if desired schedule a cleaning date.

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  • Where can I obtain the hourly data from Continuous Emissions Monitors (CEMs)?

    The CEM emissions data are available from the EPA Clean Air Markets Program Data website.

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  • Where can I get maps and/or emissions of facility emissions data?

    The EPA provides emissions maps in two ways. First, each of the last three NEI years have a “Facility Mapping” tab available on the main NEI page for that inventory year (for example, see the 2020 NEI page). With this tool, maps can be created for one state at a…

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  • How can I get more detailed information? What measurements/sensors are used to measure emissions?

    Access the latest NEI data set . Under 'Sector Summaries - Criteria and Hazardous Air Pollutants by 60 EIS emission sectors', > choose National > for Pollutant, choose PM10 Primary and/ or PM2.5-PRI > Sector, choose all sectors >Submit Query to see results at bottom of page. Open the results…

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  • How will a cleaning date be scheduled?

    A scheduling specialist will contact you to find a date and time for a pre-cleaning interview at your home or place of business.

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