Hazardous Waste Generator Classes

CESQG

Conditionally Exempt Small Quantity Generators

SQG

Small Quantity Generators

LQG

Large Quantity Generators

Waste Generated

per Month

100 kilograms (220 pounds) or less 

-or-

1 kilogram of acutely or extremely hazardous waste in any calendar month 

Less than 1,000 kilograms (2,200 pounds) 

The generator may not hold or accumulate more than 1 kilogram of acutely or extremely hazardous waste for more than 90 days. 

 1,000 kilograms (2,200 pounds) or more 

-or-

1 kilogram of acutely or extremely hazardous waste 

Maximum Allowed Accumulation Time

The accumulation time begins on the date the generator has accumulated 100 kilograms of hazardous waste,

-or-

1 kilogram of acutely or extremely hazardous waste onsite.

180 days or less, or 270 days or less if the waste will be transported 200 miles or more for treatment, storage, or disposal. (CCR Title 22 §66262.34(d))

The quantity of waste held at one time may never exceed 6,000 kilograms (13,200 pounds).

Generator must meet the requirements of 40 CFR §262.34 (d),(e),(f) 

90 days or less from the first date on which any amount of hazardous waste begins to accumulate during that month.  (CCR Title 22, § 66262.34 (b)(2))

The generator must also comply with CCR Title 22, §66262.34(a),(c), (f)

How long can waste be stored?

Up to 180 days once the first 100 kilogram of waste has been accumulated

-or-

270 days if the treatment/disposal facility is more than 200 miles away

*The generator may not hold or accumulate more than 1 kilogram of acutely or extremely hazardous waste for more than 90 days

Up to 180 days

-or-

270 days if the treatment/disposal facility is more than 200 miles away

90 Days

 A site is a RCRA Large Quantity Generator (LQG) if the site met any of the following criteria:

• The site generated, in any single calendar month, 1,000 kg (2,200 lbs.) or more of RCRA non-acute hazardous waste;  or
• The site generated, in any single calendar month, or accumulated at any time, more than 1kg (2.2 lbs.) of RCRA acute hazardous waste; or
• The site generated, in any single calendar month, or accumulated at any time, more than 100 kg (220 lbs.) of spill cleanup material contaminated with RCRA acute hazardous waste.