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Union Pacific Railroad 31st St. | VRP Site


31st Street and Aviation Pkwy, Tucson, AZ 

Discovery Date:

December 15, 1998

Contaminants of Concern (COCs):

  • Volatile Organic Compounds (VOCs)
  • Polynuclear Aromatic Hydrocarbons (PAHs)

Affected Media:

  • Soil
  • Groundwater 

What Are My Health Risks?

For Soil | There is little to no health risk unless there is contact with skin or ingestion of contaminated soil.

For Groundwater | If you are connected to a Public Water System (PWS) there is little to no risk of impact from exceedances because the water is filtered through the PWS for residential and business use. | View Drinking Water Notices > 

If you have a private well in the vicinity of the exceedance, we encourage you to test the well water.
Not sure what to test for? | 
Learn More > 

Site Summary:

  • Groundwater plume is characterized
  • Groundwater monitoring wells sampled and free product bailed semi-annually in February and August
  • Groundwater monitoring reports submitted after semi-annual events
  • 2020 Annual Groundwater Monitoring Report reviewed January 2021
  • February 2021 Groundwater Monitoring Report reviewed July 2021