Guam Administrative Code

§ 501328. [Reserved.] [Reserved.]

§ 501329. [Reserved.] [Reserved.]

§ 501330. Delivery, Deposit, and Acceptance Prohibition. (a) No person shall deliver to, deposit into, or accept a regulated substance into an UST or tank system that has been identified by the agency as ineligible for delivery, deposit, or acceptance. (b) An UST or tank system s…

§ 50201. Performance Standards for UST Systems. (a) In order to prevent releases due to structural failure, corrosion, or spills and overfills for as long as the UST system is used to store regulated substances, owners and operators of UST systems must meet all applicable require…

§ 50202. Upgrading of UST Systems. (a) All UST systems must comply with one of the following requirements: (1) UST system performance standards in § 50201(b) to (d); (2) For airport hydrant fuel distribution systems and UST systems with field-constructed tanks installed on or bef…

§ 50203. [Reserved.] [Reserved.]

§ 50204. Tank and Piping Design for Hazardous Substances UST System. Owners and operators of hazardous substance UST systems must provide secondary containment for tanks and underground piping that meets the requirements of § 50205.

§ 50205. Secondary Containment Design. (a) Secondary containment systems must be designed, constructed, and installed to: (1) Contain regulated substances leaked from the primary containment until they are detected and removed; (2) Prevent the release of regulated substances to t…

§ 50206. Under-Dispenser Containment. (a) Dispenser systems installed on or after April 11, 2016, must have under-dispenser containment that meets the requirements in this subsection. Under-dispenser containment requirement must: (1) Be liquid-tight on its sides, bottom, and at a…

§ 50207. Performance Standards and Design for UST System - Code of Practice. (a) The following current codes of practice may be used to comply with § 50201(b)(1): (1) Underwriters Laboratories Standard 1316, “Glass- Fiber-Reinforced Plastic Underground Storage Tanks for Petroleum…

§ 50208 to § 50210. [Reserved.]

§ 50301. Spill and Overfill Control. (a) Owners and operators must ensure that releases due to spilling or overfilling do not occur. The owner and operator must D IV . 10 – G UAM U NDERGROUND S TORAGE T ANK C H . 50 – G UAM U NDERGROUND S TORAGE T ANK R EGULATIONS 28 ensure that …

§ 50302. Operation and Maintenance of Corrosion Protection. (a) All owners and operators of metal UST systems with corrosion protection must comply with the following requirements to ensure that releases due to corrosion are prevented until the UST system is permanently closed or…

§ 50303. Compatibility. (a) Owners and operators must use an UST system made of or lined with materials that are compatible with the substance stored in the UST system. (b) Owners and operators must notify the agency at least thirty (30) days prior to switching to a regulated sub…

§ 50304. Repairs Allowed. (a) Owners and operators of UST systems must ensure that repairs will prevent releases due to structural failure or corrosion as long as the UST system is used to store regulated substances. The repairs must meet the following requirements: (1) Repairs t…

§ 50305. Notification, Reporting, and Recordkeeping. (a) Notification. Owners and operators shall notify the agency of any of the following changes in information relating to an UST or tank system by submitting the “Notification for Underground Storage Tanks” form prescribed by t…

§ 50306. Periodic Testing of Spill Prevention Equipment and Containment Sumps Used for Interstitial Monitoring of Piping and Periodic Inspection of Overfill Prevention Equipment. (a) Owners and operators of UST systems with spill and overfill prevention equipment and containment …

§ 50307. Periodic Operation and Maintenance Walkthrough Inspections. (a) To properly operate and maintain UST systems, not later than October 13, 2018, owners and operators must conduct walkthrough inspections that, at a minimum, check the following equipment as specified below: …

§ 50308. Periodic Inspection and Maintenance of Under- Dispenser Containment Sensing Devices. (a) Sensing devices for under-dispenser containment required by § 50206 must: (1) Be operated and maintained in accordance with one of the following: (A) The manufacturer’s instructions;…

§ 50309. General Operating Requirements – Codes of Practice. (a) The following current codes of practice may be used to comply with § 50301(a): (1) the transfer procedures described in National Fire Protection Association Standard 385; (2) “Standard for Tank Vehicles for Flammabl…

§ 50310. [Reserved.]

§ 50401. General Requirements for All UST Systems. (a) Owners and operators of UST systems must provide a method, or combination of methods, of release detection that: (1) Can detect a release from any portion of the tank and the connected underground piping that routinely contai…

§ 50402. Requirements for Petroleum UST Systems. (a) Tanks. Owners and operators of petroleum UST systems must provide release detection for tanks as follows: (1) UST systems other than airport hydrant fuel distribution systems and UST systems with field- constructed tanks: (A) T…

§ 50403. Requirements for Hazardous Substance UST Systems. Owners and operators of hazardous substance UST systems must monitor these systems in accordance with § 50404(a)(7) at least every thirty (30) calendar days. In addition, underground piping that conveys hazardous substanc…

§ 50404. Methods of Release Detection for Tanks. (a) Each method of release detection for tanks used to meet the requirements of § 50401 to § 50403 must be conducted in accordance with the following: (1) Inventory control. Product inventory control (or another test of equivalent …

§ 50405. Methods of Release Detection for Piping. (a) Each method of release detection for piping used to meet the requirements of § 50401 to § 50403 must be conducted in accordance with the following: (1) Automatic line leak detectors. Methods which alert the operator to the pre…

§ 50406. Release Detection Recordkeeping. (a) All UST system owners and operators must maintain records in accordance with § 50305 demonstrating compliance with all applicable requirements of this subchapter. These records must include the following: (1) All written performance c…

§ 50407. Release Detection - Code of Practice. (a) The following current code of practice may be used to comply with § 50401(a)(4): (1) Petroleum Equipment Institute Publication RP1200, “Recommended Practices for the Testing and Verification of Spill, Overfill, Leak Detection and…

§ 50408 to § 50410. [Reserved.]

§ 50501 and § 50503, spills and overfills § 50504, and confirmed releases § 50602; (2) Release response actions planned or taken, including initial abatement measures § 50603, initial site characterization § 50604, free product removal § 50605, investigation of soil and groundwat…

§ 50502. Investigation of Off-site Impacts. When required by the agency, owners and operators of UST systems must follow the procedures in § 50503 to determine if the UST system is the source of off-site impacts. These impacts include the discovery of regulated substances (such a…

§ 50503. Release Investigation and Confirmation Steps. (a) Unless release response action is initiated in accordance with Article 6, owners and operators must immediately investigate and confirm all suspected releases of regulated substances requiring reporting under § 50501 with…

§ 50504. Reporting and Cleanup of Spills and Overfill. (a) Owners and operators of UST systems must contain and immediately clean up all spills and overfills in a manner which is protective of human health and the environment as set forth in § 50606.3. (b) Owners and operators mu…

§ 50505 to § 50510. [Reserved.] D IV . 10 – G UAM U NDERGROUND S TORAGE T ANK C H . 50 – G UAM U NDERGROUND S TORAGE T ANK R EGULATIONS 63

§ 50601. General. Owners and operators of petroleum or hazardous substance UST systems must, in response to a confirmed release from the UST system, comply with the requirements of this Article, except for USTs excluded under § 50110(b) and UST systems subject to RCRA Subtitle C …

§ 50602. Immediate Response Action. (a) Upon confirmation of a release in accordance with § 50503 or after a release from the UST system is identified in any other manner, owners and operators must perform the following response actions within twenty-four (24) hours: (1) Report t…

§ 50602.1. Posting of Signs. (a) If the agency determines that posting of signs is appropriate, owners and operators shall post signs around the perimeter of the site informing passersby of the potential hazards. In this instance, “site” means an area where contamination poses an…

§ 50603. Initial Abatement Measures and Site Assessment. (a) Unless directed to do otherwise by the agency, owners and operators must perform the following abatement measures: (1) Continue to remove as much of the regulated substance from the UST system as is necessary to prevent…

§ 50604. Initial Site Characterization. (a) Owners and operators must assemble information about the site and the nature of the release, including information gained while confirming the release or completing the initial abatement measures in § 50601 and § 50602. This information…

§ 50605. Free Product Removal. (a) At sites where investigations under § 50603(a)(6) indicate the presence of free product, owners and operators must remove free product to the maximum extent practicable as determined by the agency while continuing, as necessary, any D IV . 10 – …

§ 50606. Investigation for Soil and Groundwater Cleanup. (a) In order to determine the full extent and location of soils contaminated by the release and the presence and concentrations of dissolved product contamination in the groundwater and surface water, owners and operators m…

§ 50606.1. Notification of Confirmed Release. (a) Within ninety (90) calendar days following confirmation of a release, the owner and operator shall notify those members of the public directly affected by the release in writing of the release and the proposed response to the rele…

§ 50606.2. Release Response Reporting. (a) No later than ninety (90) calendar days following the confirmation of a release, owners and operators must submit to the agency a written report in the format specified by the agency. The report must include: (1) All release response act…

§ 50606.3. Site Cleanup Criteria. (a) Owners and operators must remediate soil, surface water, and groundwater, and materials contaminated by releases from USTs or tank systems in a manner that is protective of human health and the environment and achieves cleanup as described in…

§ 50607. Corrective Action. (a) The agency may require that the owner and operator submit a written corrective action plan for responding to a release, if one or more of the following minimum threshold criteria are met: (1) Actual or probable release to groundwater which is a dri…

§ 50608. Public Participation for Corrective Action Plans. (a) The agency shall conduct public participation activities in accordance with subsections (c) through (h) when: (1) A corrective action plan required pursuant to 50607(a) has been submitted and the agency has made a ten…