PCS from one or more points of generation under the control of a single generator may be accumulated on a site under the control of that generator for up to 90 days before a shipment to a storage, disposal, or treatment facility is made.
An accumulation site must comply with all of the following:⁵

• Store PCS within a containment system.
• A PCS accumulation area, tank, or container is required to have the following markings:
  • CAUTION: CONTAINS PETROLEUM-CONTAMINATED SOIL
  • GENERATOR NAME:
  • GENERATOR SPECIAL WASTE ID:
  • ACCUMULATION START DATE:
• Fill in the accumulation start date at the time the PCS is placed into storage. The labels should be legible, not obstructed from view, on a high contrast background, and sufficiently durable to equipment or exceed the duration of the storage. Lettering should be 1 inch in height and in Sans Serif, Gothic, or Block style.
• While PCS is at an accumulation site the owner or operator must control public access and prevent unauthorized vehicular traffic and illegal dumping.
• Manage PCS to prevent it from being exposed to storm water run-on and run-off.
• Tanks or containers must meet the following requirements:
  • Prevent leakage of the PCS and any free liquids from the tank or container.
  • Be made of, or lined with, materials which will not react with the PCS.
  • Be kept closed during storage except to add or remove PCS.
  • Not be opened, handled, or stored in a manner which may rupture the tank or container or cause a leak.
  • Inspected monthly by the owner or operator of the facility for leaks and deterioration. A written record of the inspection is required to be prepared at the time of inspection and must document any corrective action, if any, that was taken as a result of the inspection.

Facilities that accumulate PCS in piles are required to comply with the following:

• Cover all piles or otherwise manage to control wind dispersal of PCS
• Inspect piles weekly and prepare a written record of the inspection at the time of the inspection which documents any corrective action as a result of the inspection and includes the following:
  • Deterioration, malfunctions, or improper operation of run-on and run-off control systems
  • Malfunction of wind dispersal control systems
  • Presence of leachate in and the malfunction of any leachate collection and removal systems

PCS must be transported by an ADEQ-approved special waste transporter to an ADEQ-approved special waste receiving facility. The special waste transporter must make sure the PCS is in closed containers and that the vehicle used for transport is constructed to prevent leaks and spills and is covered to prevent blowing of material.⁷

PCS must be stored, treated, or disposed of at an ADEQ-approved special waste receiving facility or a permitted hazardous waste management facility.⁶

Keep all PCS records for at least 3 years. If you are notified of an enforcement action by ADEQ, records are required to be kept until a final determination has been made in the matter or in accordance with the final determination.⁸