PUBLIC NOTICE | Proposed Leaking UST Case Closure for Case File 0722.09

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

LUST Case File No.: 0722.09     

Facility ID No.: 0-000792
Mohave County

Facility address: 
Former Laughlin/Bullhead City International Airport Fuel Facility
600 N. Highway 95
Bullhead City, AZ 86429

Information

This undeveloped land is located at 600 North Highway 95 in Bullhead City.  The property is surrounded by commercial businesses including a Sam’s Club with a fueling center. The property is owned by the Mohave County Airport Authority which is also the UST Owner/Operator. Site investigations were initiated in May 1989.  ADEQ assigned LUST release numbers 0722.01 and .02 in May 1989 for UST #4 and #5 respectively. Between 1990 and 2003, four monitoring wells were installed. In 2004, three additional monitoring wells were installed.   In 2005, eight USTs, dispensers and piping were removed and the site building and canopy were demolished.  The existing monitoring and remediation wells were all removed to accommodate site redevelopment.  LUST releases .03-.09 were assigned in 2006. Nine monitoring wells which include MW-P5 were installed in 2006.  Eight additional monitoring wells were installed in 2007. The remaining open LUST releases were characterized in 2007.  Seven of the nine LUST releases were closed in 2012 and 2013.  Ten wells (monitoring wells and remediation wells) were abandoned in 2013.

Historic active remediation included air sparge in 2004 and between 2010 and 2012, and soil vapor extraction with air sparge between 2010 and 2011.  The vapor extraction system removed an estimated 12,190 pounds of volatile fuel hydrocarbons (gasoline).   Active remediation was stopped due to the limited cost-effectiveness of the system. The groundwater has also been treated with oxygen-releasing compound in 2003 and again from 2012 to 2014. In 2014 BOS-200® was injected into MW-P5.  Due to fouling of monitoring well MW-P5 from the injection, replacement well MW-P5R was installed in June 2016 by the current contractor.

The post remediation groundwater data shows that the volatile organic compound (VOC) concentrations have significantly decreased so that the only VOC contamination remaining on site is in monitoring wells MW-P5R and MW-P6.  The only remaining VOC in concentrations that exceed an applicable regulatory standard is benzene.

Review Document 

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

Public Comment Period 

Dates: Feb. 24, 2017  March 24, 2017

Comments may be submitted as follows:
     By Email | Send Email > 
     By Mail (Must be postmarked or received by March 24, 2017):

       ADEQ
       Debi Goodwin
       Waste Programs Division
       1110 W. Washington Street
       Phoenix, AZ  85007 

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