Ask here, but give them all the details about your samples, what you want to know about them, the types of analyzes required, preferred methodologies, how many samples, the schedule for delivering them, deadlines for the analyses, formal requirements for the results, so that they can assess what would be to be done, for when, for how much, etc.

https://www.pgi.gov.pl/en/laboratories/chemical-laboratory.html

Hello Jeanne, Actlabs is a good choice in my opinion (https://actlabs.com/)

Saludos,

Marco