Can I add a 4 L bottle of methanol solution with 0.1% formic acid into a drum containing non-halogenated waste?

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    $\begingroup$ Immediately contact your local ES&H personnel. They should know all appropriate local/regional/country laws on disposal. Note that mixing acids and organics is generally not a good thing, and there may be further issues with whatever else is in the drum. Get professional advice right now, and not from random folks on the internet. $\endgroup$ – Jon Custer Jul 5 '18 at 13:48
  • $\begingroup$ Seems you're asking rather if it's a good idea, which may or may not be the case and we can't know it in general, as it depends on situation. Asking this on internet probably is not good idea. That being said, much worse things go to drain around the world, and you seem to worry too much. $\endgroup$ – Mithoron Jul 5 '18 at 17:37
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    $\begingroup$ Jon is right, while I know that I am a nice person and a decent chemist. You do not know the people here in person. I would trust your local health, safety and environmental persons more than random folk off the internet. $\endgroup$ – Nuclear Chemist Jul 5 '18 at 18:07
  • $\begingroup$ This is a very fact specific question. Dependent on the contents of the non-halogenated waste and what waste streams your facility has established. $\endgroup$ – A.K. Jul 5 '18 at 23:31
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    $\begingroup$ @Karl - that would be illegal where I am. $\endgroup$ – Jon Custer Jul 6 '18 at 0:57