Los Reales Landfill

Registry placement date: April 23, 1999

Score: 32

County: Pima

Location: An active municipal sanitary landfill (approximately 283-acre waste footprint) in southeast Tucson that has been in operation since 1967

Contaminants of concern: Tetrachloroethene (PCE) and trichloroethene (TCE) 

Action taken: The city of Tucson (COT) has implemented a groundwater pump-and-treat system with injection and reuse of the treated water (PTI/R) as required by a 1995 remedial action plan (RAP). In 2012, COT submitted to ADEQ a RAP modification proposal to modify the RAP to allow transition from PRI/R to “groundwater sampling only” based on continued plume stability (apparent natural attenuation).  

Status: COT has obtained access to install the third of three groundwater wells (two were installed in 2015) that are needed to evaluate plume stability for COT’s proposed RAP modification.  After this third well is installed, COT will collect two years of data and then COT will perform additional modeling to support the RAP modification. If the modeling results are supportive, COT will finalize the RAP modification proposal and submit that to ADEQ for review/approval.  

Community Advisory Board (CAB): Not applicable under “Old WQARF” law/rules