Final answer:
To ensure 100 dispenser containment for underground storage tank systems, facilities must adhere to SPCC rules requiring a written containment plan for certain quantities of stored oil and implement secondary containment systems to protect the environment.
Step-by-step explanation:
To achieve 100 dispenser containment for underground storage tank systems, several requirements must be adhered to as mandated by environmental regulations such as the Spill Prevention, Control, and Countermeasure (SPCC) Rule. This rule applies to facilities that handle oil or oil products, which include a wide range of substances from petroleum to animal and vegetable oils. A written SPCC plan is necessary for facilities storing more than 1,320 gallons above ground or more than 42,000 gallons below-ground, particularly if there is a reasonable expectation of discharge into navigable waters or adjoining shorelines.
In addition to the SPCC requirements, Secondary Containment systems are mandated at oil storage facilities to prevent any release from reaching the environment. Containment systems must also be implemented at oil development sites to manage potential oil releases. For underground storage facilities specifically, containment measures such as double-walled tanks with interstitial monitoring, spill and overfill protection, and corrosion protection systems are required to safeguard groundwater and soil from contamination. These measures are part of a broader approach to treatment, storage, and disposal practices that are stringently regulated to protect soil, ground water, and air resources.