In addition to performing the waste analysis required by § 265.13 , the owner or operator must, whenever a tank system is to be used to treat chemically or to store a hazardous waste that is substantially different from waste previously treated or stored in that tank system; or treat chemically a hazardous waste with a substantially different process than any previously used in that tank system:
40 C.F.R. §265.200
Section 265.13 requires the waste analysis plan to include analyses needed to comply with §§ 265.198 and 265.199 . Section 265.73 requires the owner or operator to place the results from each waste analysis and trial test, or the documented information, in the operating record of the facility.