PUBLIC NOTICE | Proposed Leaking UST Case Closure for Case File 0263.01-.03

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

LUST Case File No.: 0263.01-.03

Facility ID No.: 0-001401
Apache County

Facility address: 
Circle K #2701383
815 East Main Street
Springerville, AZ 85938

Information

According to the LUST file, a UST system was installed in January 1980. The UST owner/operator was Tosco/Phillips 66. ADEQ assigned LUST release 0263.01 to the product piping located between the westernmost UST and the dispenser island. A second LUST release was assigned to the dispenser island which was discovered in November 1997 during Stage II upgrade activities. The third release was assigned in December 2008 to the UST basin when the UST system was permanently closed in August 2008. A new UST system was installed after the removal of the old system. Site characterization activities included soil borings and the installation of numerous monitoring wells by ATC, consultant to Tosco/Phillips 66. Site Characterization was approved in 2000 for releases 0.1 and .02, and in 2009 for release .03. Active soil and groundwater remediation using vapor extraction (VE), multiphase extraction (MPE) and in-situ chemical oxidation (ISCO) was used between November 1998 and August 2015.

A site specific risk assessment and detailed file/information search were also completed. On-site and off-site groundwater shows volatile organic compound (VOC) contamination. On-site soil contamination shows benzene and tetraethyl lead at concentrations that exceed residential Soil Remediation Levels (rSRLs) at five and 15 feet below ground surface (bgs) respectively. The groundwater flow direction has been historically north, but it can be variable since the gradient is relatively flat. The depth to water in March 2017 was 31 feet bgs. This depth is significantly lower than the depth to groundwater in March 1987 at 16 feet bgs.

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 (A.R.S.) §49-1005(E). Arizona Administrative Code (A.A.C.) R18-12-263.04 allows case closure of a LUST site with groundwater contamination above the AWQS or Tier 1 Standards..

Review Document 

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

Public Comment Period 

Dates: April 18, 2018  May 18, 2018

Comments may be submitted as follows:
     By Email | Send Email > 
     By Mail (Must be postmarked or received by May 18, 2018):

       ADEQ
       Jorge Espinosa
       Waste Programs Division
       1110 W. Washington Street
       Phoenix, AZ  85007 

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