St. Mary's Landfill
To ensure the safety of the public and the environment by monitoring, managing, and controlling landfill gas and site safety.
425 N. Grande Ave
1963 - 1973
Monitored Only Site
Groundwater Protection Project
City of Tucson - Environmental Services 520-791-3175
St. Mary’s Landfill is located at Menlo Park near Grande Ave and St. Mary’s Rd. The landfill was used for the disposal of Class II trash and debris consisting primarily of green waste and construction debris. Today the City monitors 29 landfill gas probes on a quarterly basis, and inspects the landfill annually for erosion and other potential issues.
Evaluation of historical operational records from the landfill indicates that it is a low future environmental risk.
Inspections, Landfill Gas Monitoring
Monday Jul 1, 2019
View this project on the Environmental Management Projects Map
The City is scheduled to conduct an annual closed landfill inspection. A report will be prepared following this inspection documenting the site conditions.
January, April, July, & October
The City conducts quarterly landfill gas monitoring at perimeter probes during these months every year to monitor for methane migration at the property boundary.
The City completed the Comprehensive Landfill Investigation and Closed Landfill Inspection reports. This landfill is discussed in both of these reports. These reports are available in the report/attachment section of this website.
The City installed shallow landfill gas monitor probes to monitor methane concentrations between the landfill and nearby businesses and began routine monitoring.