This is an administrative penalty action involving a consent agreement/final order (CA/FO) which simultaneously initiates and concludes the action. The action is brought pursuant to RCRA 9006 (RCRA UST) against Respondent, Guam Office of Civil Defense. The action establishes a penalty in the amount of $5,000 and requires closure of a substandard underground storage tank (UST), performance of a site assessment and submittal of a closure report. The violation cited was for failure to perform replacement, upgrade, or closure of an existing substandard tank system.