NFPA 30 Flammable and Combustible Liquids Code
NFPA 33 Standard for Spray Application of Flammable or Combustible Materials
NFPA 70 National Electrical Code

IFC International Fire Code

Listing Requirements: (Solvent Recyclers)

Most Local Jurisdictions (Fire Marshal, Electrical Inspector, etc.) and Insurance Companies require Solvent Recyclers to be Listed by a third party (UL, ETL, CSA, etc.)

The standards used for listing these types of equipment are:

U.L. 2208 Standard for Solvent Distillation Units
Class 1 Div I locations Group D

Note: Many other Standards, such as NFPA are identified in this document depending on the application of the unit.
 

Environmental Requirements
EPA Hazardous Waste Generator Status Levels and Requirements
 

EPA Requirements

"Cradle to Grave" Liability:
EPA regulations state that generators of hazardous waste are liable for the waste from the time it is generated at their facility to the time it is disposed of, even if it is no longer in their custody. This means that if solvent waste from your plant contaminates the environment during the transport to the disposal site, or after it reaches the disposal facility, you must pay for the clean-up. Neither the waste hauler nor the disposal facilities are liable under the EPA law.

EPA: In the Pollution Prevention Act of 1990, the preferred waste minimization options, as defined by section 6602(b) of the Act, are prevention and environmentally sound recycling followed by treatment and disposal.

A 1994 guideline document (EPA/625/R-93/017) states that: "....recycling should be used where possible to minimize or avoid the need to treat wastes that remain after viable source reduction options have been evaluated and/or implemented."
 

DO NOT THROUGH YOUR STILL BOTTOMS IN THE TRASH!

If you receive materials considered as hazardous: Then all still bottoms are considered hazardous until proven different!

To prove different requires: 
Pass the Toxic Characteristic Test (TCLP)
Pass Ignitibility Test
Pass Corrosive Test
Pass Reactivity Test

We would also recommend:
Process approved from local EPA in writing
Process approved from local land fill in writing