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State of New Jersey Department of Environmental Protection
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Analysis of the 1996 NATA Results
Analysis of the 1990 NATA Results
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1990 Sources of Air Toxics

THE 1990 EMISSION INVENTORY

As part of the Cumulative Exposure Project (CEP), USEPA prepared a comprehensive list of air toxics emissions for the entire country in 1990. This is the first time that such a list (known as an emissions inventory) had ever been prepared on a national scale. Although there are bound to be some errors in the details of a massive undertaking such as this, a summary of the emissions inventory can give us some indication of what may be the most important sources of air toxic emissions in our state. As can be seen from the pie chart below, the group known as Area Sources accounts for more than half (52%) of the air toxics inventory with solvent use representing the biggest portion (34% of the whole inventory). Mobile Sources as a group are the second largest contributor to air toxics (38%), with On-road Vehicles representing 29% of the whole state inventory. The Point Source group accounts for the remaining 10% of the inventory.

USEPA's 1990 Air Toxics Inventory for New Jersey
USEPA's 1990 Air Toxics Inventory for New Jersey

When the emissions estimates are broken down by county, it is clear that the areas with the largest air toxic emissions are generally those with the largest population in the smallest space. This is directly related to high concentration of vehicle use, solvent use and other types of activities in those counties.

USEAP Estimated Air Toxics Emissions for New Jersey, by County
USEAP Estimated Air Toxics Emissions for New Jersey, by County

Note: The high emissions shown for Salem County in this chart are skewed by an error in the Industrial Processes source category. US EPA has confirmed that this could lead to overprediction of some toxic exposures in Salem County (by as much as 80 percent).

In the 1990 CEP, the Point, Area and Mobile Sources are grouped in the following way:

  • Area Sources: this list includes many types of sources that are commonly referred to as Point Sources in New Jersey, such as power plants:
    • Solvent Use (such as coating cans, cleaning metal parts, and dry cleaning)
    • Industrial Processes (such as small chemical manufacturing plants, bakeries, and making scrap metal into new product)
    • Waste Disposal, Treatment and Recovery (including wastewater treatment and various types of waste incineration)
    • Stationary Source Fuel Combustion (including power plants, industrial and commercial boilers, and home heating)
    • Storage and Transport (including gas stations and large gasoline terminals)
    • Miscellaneous Sources (such as wildfires, structure fires, and crop orchard heaters)

  • Mobile Sources
    • On-road vehicles (cars and trucks)
    • Non-road vehicles (lawnmowers, boats, dirt bikes, etc.)

  • Point Sources: this list does not include many types of sources that are commonly referred to as Point Sources in New Jersey, such as power plants:
    • Refineries
    • Municipal Waste Incinerators
    • Toxic Waste Transfer, Storage & Disposal Facilities (known as TSDFs)
    • TRI Sources (those facilities that are required to report their emissions under the Right-to-Know program)
    • Other Point Sources (that have reported emissions under other state and federal programs)
"" 1996 Emissions Inventory Information

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Last Updated: March 30, 2011