Best Management Practices
Prevention first
Best management practice questions almost always reward the most preventive, most permanent option. Use the waste hierarchy: source reduction (substitution, process change, inventory control), reuse, recycling or recovery, treatment, then disposal. Pair it with the hierarchy of controls - elimination, substitution, engineering controls, administrative controls, and PPE - knowing PPE is the last line of defense, not the first answer.
Systems and programs
A functioning environmental management system (ISO 14001) follows Plan–Do–Check–Act: identify aspects and legal requirements, set objectives, implement, monitor, and conduct management review. Expect documented procedures, defined roles, training records, and corrective-action tracking. For hazardous materials, expect container management (closed, compatible, labeled, with accumulation start date), satellite accumulation limits, routine inspections, spill kits and drainage controls, and a written contingency plan with notification lists and drills.
Spill response and waste decisions
Sequence the response: protect people, stop the source, contain, notify, clean up, manage the residue as waste, and investigate root cause. Characterize waste before shipping - never rely on a vendor's guess - and treat the manifest as the chain-of-custody document.
Traps
Options that merely move the problem, such as off-site recycling of a solvent that could be replaced by an aqueous process, are usually not "best." Dilute-and-disperse is not a control strategy, and choosing more PPE over an engineering control loses points.
Rule of thumb
If two answers are both legal and both workable, pick the one higher in the hierarchy: eliminate the hazard beats control the exposure beats protect the worker.