LQGs are allowed to accumulate hazardous waste on site for up to 90 days in specified units without obtaining a storage permit, if they comply with the requirements of T22, CCR section 66262.34(a) & (f).

SQGs may accumulate up to 6,000 kg of hazardous waste for 180 days or less without a storage permit if they comply with the modified requirements in T22, section 66262.34(d). If the TSDF is 200 miles or more away, the generator may accumulate hazardous waste for 270 days or less. Note that these extended time limits only apply to SQGs accumulating waste in tanks or containers. SQGs who accumulate waste in containment buildings or on drip pads are subject to the accumulation standards for LQGs.

Generators may receive a 30-day extension to their 90-day, 180-day, or 270-day accumulation period if uncontrollable and unforeseen circumstances cause them to accumulate waste on site for longer than the allowed time period. Such an extension may be granted by DTSC on a case-by-case basis. An example of an uncontrolled or unforeseen circumstance is a truckers’ strike preventing the shipment of waste off site.

LQGs and SQGs accumulating waste beyond the authorized time limits for their categories become storage facilities subject to the requirements applicable to Owners and Operators of Hazardous Waste Transfer, Treatment, Storage, and Disposal Facilities including permitting. An SQG who accumulates more than 6,000 kg during the authorized period also becomes a storage facility.