PUBLIC NOTICE | Proposed Leaking UST Case Closure for Case File 2530.03

ADEQ is considering closure of the following leaking underground storage tank (LUST) case:

LUST Case File No.: 2530.03  

Facility ID No.: 0-001960
Maricopa County

Facility address: 
Brown Evans Distributing Co. (Mesa Cardlock)
1149 S. Sirrine
Mesa, Arizona 85210

Information

This commercial property (Site) operated as the former Brown Evans Distributing Mesa Cardlock facility. The Site operated from approximately 1984 until 2006 when the UST system was removed.  Two LUST releases .01 and .02 have been closed. LUST release .03 was assigned to the northeast diesel dispenser. Site characterization activities were conducted and documented in the June 6, 2007 Site Characterization Report. Additional characterization activities were conducted and the Site Characterization Report was approved Dec. 8, 2010. In 2011, EnCore Consulting LLC (EC), on behalf of Brown Evans Distributing Co., conducted a Tier II risk Assessment was approved by ADEQ. The Tier II Risk Assessment indicated that “levels of residual contaminants were protective of human health and the environment for direct contact with shallow soils and indoor air vapor intrusion assuming a hypothetical residential use for the property.”

In December 2014, EC conducted a brief soil vapor extraction test at monitor well (MW-1) to evaluate the potential for light non-aqueous phase liquid (LNAPL). LNAPL historically has ranged in thickness in MW-1 between non-detectable and 0.53 feet. LNAPL has never been reported in the other three monitoring wells. Benzene and 1,2-dichloroethane (1,2-DCA) concentrations in groundwater have historically exceeded applicable regulatory standards in MW-1,  MW-3 and MW-4.  MW-2 has never shown any volatile organic compound (VOC) contamination concentrations over applicable regulatory standards.

Current data provided by the UST owner/operator, and all other available site information has been used by ADEQ to determine whether remaining levels of contaminants at the site are adequately protective of human health and the environment.  A site specific risk assessment and detailed file/information search were also completed.  VOC analytical groundwater results in MW-1 show some VOC concentrations remain above applicable Tier 1 Corrective Action Standards.  The results for all other monitoring wells is available in the LUST file.

Based upon the results of remedial activities and site specific information, the above-referenced LUST site is eligible for alternative LUST closure under Arizona Revised Statutes (ARS) §49-1005(E).  Arizona Administrative Code (AAC) R18-12-263.04 allows case closure of a LUST site with groundwater contamination above the Arizona Aquifer Water Quality Standards (AWQS) or Tier 1 Corrective Action Standards. ADEQ has considered the results of a site-specific assessment and rule-specific criteria.

Review Document 

Review results of remedial activities and entire public notice | View/Print >

Public Comment Period 

Dates: March 13, 2018  April 13, 2018

Comments may be submitted as follows:
     By Email | Send Email > 
     By Mail (Must be postmarked or received by April 13, 2018):

       ADEQ
       Heather Flowers
       Waste Programs Division
       1110 W. Washington Street
       Phoenix, AZ  85007 

Documents may also be reviewed in person at the ADEQ Record Center | Learn More >