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Underground Storage Tank Response Plan—Page 2 of 2 E. MONITORING INDICATORS IF MONITORING INDICATES A POSSIBLE UNAUTHORIZED RELEASE,STEPS TO VERIFY THE RELEASE WILL BE MADE AS FOLLOWS: ®Additional System Testing or Data Collection ® Inspection By Qualified Persons x❑Recalibration of Equipment © Other(Specify): Follow the steps on the accompanying"Simplified Response Plan for the Removal of an Unauthorized Release From the Interstitial Space of Double-Containment UST Systems." F. REPORTING AND RECORD KEEPING We will report/record any overfill,spill,or unauthorized release from a UST system as indicated in this plan. Recordable Releases:Any unauthorized release from primary containment which the UST operator is able to clean up within eight(8)hours after the release was detected or should reasonably have been detected, and which does not escape from secondary containment, does not increase the hazard of fire or explosion, and does not cause any deterioration of secondary containment,must be recorded in the facility's monitoring records. Monitoring records must include: ➢ The UST operator's name and telephone number; ➢ A list of the types,quantities,and concentrations of hazardous substances released; ➢ A description of the actions taken to control and clean up the release; ➢ The method and location of disposal of the released hazardous substances,and whether a hazardous waste manifest was or will be used; ➢ A description of actions taken to repair the UST and to prevent future releases; ➢ A description of the method used to reactivate interstitial monitoring after replacement or repair of primary containment. Reportable Releases:Any overfill,spill,or unauthorized release which escapes from secondary containment(or primary containment if no secondary containment exists),increases the hazard of fire or explosion,or causes any deterioration of secondary containment,is a reportable release.Reportable releases are also recordable. Within 24 hours after a reportable release has been detected,or should have been detected,we will notify the local agency administering the UST program of the release, investigate the release, and take immediate measures to stop the release. If necessary, or if required by the local agency, remaining stored product/waste will be removed from the UST to prevent further releases or facilitate corrective action. If an emergency exists,we will notify the California Office of Emergency Services(OES)at(800)852-7550. Within five(5)working days of a reportable release,we will submit to the local agency a full written report containing all of the following information to the extent that the information is known at the time of filing the report: ➢ The UST owner's or operator's name and telephone number; ➢ A list of the types,quantities,and concentrations of hazardous materials released; ➢ The approximate date of the release; ➢ The date on which the release was discovered; ➢ The date on which the release was stopped; ➢ A description of actions taken to control and/or stop the release; ➢ A description of corrective and remedial actions,including investigations which were undertaken and will be conducted to determine the nature and extent of soil,ground water or surface water contamination due to the release; ➢ The method(s)of cleanup implemented to date,proposed cleanup actions,and a schedule for implementing the proposed actions; ➢ The method(s)and location(s)of disposal of released hazardous materials and any contaminated soils,groundwater,or surface water. ➢ Copies of any hazardous waste manifests used for off-site transport of hazardous wastes associated with clean-up activity; ➢ A description of proposed methods for any repair or replacement of UST system primary/secondary containment systems; ➢ A description of additional actions taken to prevent future releases. We will follow the reporting procedures described above if any of the following conditions occur: ➢A recordable unauthorized release can not be cleaned up or is still under investigation within eight(8)hours of detection; ➢Released hazardous substances are discovered at the UST site or in the surrounding area; ➢ Unusual operating conditions are observed,including erratic behavior of product dispensing equipment,sudden loss of product,or the unexplained presence of water in the tank,unless system equipment is found to be defective and is immediately repaired or replaced,and no leak has occurred; ➢Monitoring results from UST system monitoring equipment/methods indicate that a release may have occurred,unless the monitoring equipment is found to be defective and is immediately repaired,recalibrated,or replaced,and additional monitoring does not confirm the initial results. Record Retention: Monitoring records and written reports of unauthorized releases must be maintained on-site(or off-site at a readily available location,if approved by the local agency)for at least 3 years.Hazardous waste shipping/disposal records(e.g.,manifests)must be maintained for at least 3 years from the date of shipment. UN-022B www.unidocs.org 2/2-Rev.07/02/18