Ryan Field Landfill

Objectives
To ensure the safety of the public and the environment with site inspections.
Location
9698 W Ajo Way
Waste Acreage
7.3
Operation Dates
1973-1977
Status
Monitored Only Site
Type
Groundwater Protection Project
Annual Budget
Approximately $20,000
Contact
City of Tucson - Environmental Services 520-791-3175
Description
The Ryan Airfield Landfill is located in southeastern Avra Valley at the southeast end of the airfield’s runway system. The landfill received residential and commercial refuse from the airfield and homes, farms and businesses located in the surrounding Avra Valley area. The property is owned by the City of Tucson and is leased to the Tucson Airport Authority. Today the City inspects the landfill annually. There are no shallow landfill gas probes at the site because there are no nearby buildings.
Additional Info
Based on a review of historical operational records and soil vapor and groundwater monitoring data collected from 2007 through 2009, this landfill is considered a low future environmental risk.
Activities
Inspections
Last Update
Wednesday Jun 8, 2022

October-December
The City is scheduled to conduct an annual closed landfill inspection. A report will be prepared following this inspection documenting the site conditions.

November 4, 2010
The City completed the 2009 Groundwater and Soil Gas Monitoring Report. As discussed in this report, future soil vapor and groundwater monitoring was discontinued. Based on the trends of seven years of soil vapor data and three years of groundwater VOC data, the probability of impacts to the groundwater from this landfill is low. This report is available in the report/attachment section of this website.

2006
The City installed groundwater monitoring wells and began routine monitoring.

2003
The City installed deep soil vapor monitoring wells and began routine monitoring.

Overlooking the landfill cover towards the north. A monitor well box (white box) can be seen in the picture.

Ryan Airfield Landfill is located at the south-eastern end of the airport runway. This is a picture of the airport tower.

2015 Landfill Inspection Report

This report documents the annual landfill inspection activities conducted at Ryan Airfield Landfill on September 30, 2015.

Soil Gas Monitoring Report 2010 and 2011

Soil gas monitoring report to verify soil gas concentrations observed during soil gas monitoring in December 2009. The text, tables, and figures to the report are available at this link. To review the full document contact the Environmental Services office at 520-791-3175.

Annual Monitoring Report - 2009

Groundwater and soil gas monitoring report covering the January - December 2009 period. The text, tables, and figures to the report are available at this link. For the full document contact the Environmental Services office at 520-791-3175.

Closed Landfills Inspection and Maintenance Report

The City of Tucson - Environmental Services owns and maintains fifteen closed regulated and non-regulated landfills. This guidance report provides the procedures for inspecting and maintaining those landfills. The text portion of this report is available at this link. To review the full document contact the Environmental Services office at 520-791-3175.

ES Projects