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Chapter 4:Secondary Containment and Impracticability Determination 4.7.5 Mobile/Portable Containers (Except for Mobile Refuelers and Other Non- Transportation-related Tank Trucks) (Specific Secondary Containment Requirements, §§112.8(c)(11) and 112.12(c)(11)) Mobile or portable oil storage containers with a capacity to store 55 gallons or more of oil and operating exclusively within the confines of a non-transportation-related facility are regulated underthe SPCC rule. With the exception of mobile refuelers and other non-transportation related tanktrucks,such containers must comply with the secondary containment requirements of§112.8(c)(11) (or§112.12(c)(11) in the case of a facility that stores or handles animal fats or vegetable oils). Examples of mobile portable containers include, but are not §§312.8(c)(11)and 312.12(c)(11) limited to,55-gallon drums,skid tanks,totes, and intermediate bulk Position or locate mobile or portable oil containers(IBCs). storage containers to prevent a discharge as described in §112.1(b). According to§§112.8(c)(11)and 112.12(c)(11), mobile or Except for Mobile refuelers and other portable containers (excluding mobile refuelers and other non- non-transportation-related tank trucks, you must furnish a secondary means of transportation-related tank trucks) must be positioned or located to containment,such as a dike or prevent a discharge as described in §112.1(b).The provision requires catchment basin,sufficient to contain that the secondary containment be sized to hold the capacity of the the capacity of the largest single largest single compartment or container with sufficient freeboard to compartment or container with contain precipitation. sufficient freeboard to contain precipitation. The appropriate containment methods for mobile containers mute:The above text is an excerpt of the secc may vary depending on the activity in which the container is engaged rule.Referto 40 CFR part 112 for the fun text of at a given time.Thus,secondary containment requirements may be the rule. met differently depending upon the type of operation being performed, as described below. When mobile containers,such as drums,skids,and totes, are in a stationary mode,the requirements of §4112.8(c)(11) and 112.12(c)(11)aa may be met through the use of permanent secondary containment methods, such as dikes,curbing,drainage systems,and catchment basins. In order to comply with this requirement,an owner/operator may designate an area of the facility in which to locate mobile containers when not in use.This area must be designed,following good engineering practices,to hold the capacity of the largest single compartment or container with sufficient freeboard to contain precipitation.The area designated for mobile portable containers must be identified on the facility diagram"provided within the SPCC Plan (§112.7(a)(3)), While in use,mobile containers,such as drums,skids,and totes, must also comply with the requirements of§112.8(c)(11)or§112.12(c)(11) according to good engineering practice and the areas where the containers are used must be marked on the facility diagram. For these types of containers,the EPA inspector should verify that the secondary containment methods are appropriate to prevent a discharge to navigable waters or adjoining shorelines. For example,an oil-filled drum positioned for use at a construction site must be sa Mobile/portable containers at Tier l qualified facilities are subject to§112.8(a)(3)(ii)in lieu of§§112.8(c)(11)and 112.1Z(c)(11). 90 Tier l qualified facilities are not subjeato the facility diagram requirement in§112.7(e)(3). SPCC GUIDANCE FOR REGIONAL INSPECTORS 4-59 December 16,2013