Special Containment Procedures
The city of Puławy, Poland has implemented mole-repellent devices across the cities dirt terrain by the Foundation's request.
This is something the Foundation would likely take into their own hands rather than trust a government to do it, specially a municipality. Also
cities —-> city's
No reported breaches of containment have been made by SCP-XXXX instances since implementation of mole-repellent devices, except in areas in which the devices have not been placed.
This sentence is redundant, the containment procedures wouldn't be such if they didn't work!
The only exceptions to the mole-repellent areas are two three controlled places in remote dirt fields, two of which completely unaccessable to public being covered by a concrete wall with barbed wire railing the top.
I suggest changing your wording to something along the lines of 'Three control areas have been established outside of civilian access, which allow for manifestations of SCP-XXXX' or something along those lines.
It is currently disguised as private territory.
Instead of private territory, private land would work here.
If the breach is formed by a light (1-20) amount of SCP-XXXX instances, the assigned pest-control company of Puławy linking to SCP-XXXX is to be dialed and the instances are to be captured and placed back into any hole made by a SCP-XXXX instance.
This sentence reads a little janky. I think you're trying to say that the Foundation will call up an exterminator to deal with them? Again, this is something that they're more likely to do on their own rather than outsource someone.
All unauthorised personnel who experience a SCP-XXXX recontainment-event after a breach are to be given impotent amnestics, preferably Class-A or B.
It would suffice to say "Civilians witnessing SCP-XXXX manifestations are to be administered Class-A amnestics." or something like that.
Note
This is redundant and doesn't have to be there. It doesn't add anything to the containment procedures.
Description
with most instances being able to create complex conversations with unanomalous personnel.
Since we can see that they're able to speak Polish, I think it would be better to say that they're conversational. This way you get the message across in only one word.
The anomalous capabilities of SCP-XXXX become obvious when an instance reaches surface. This is when SCP-XXXX starts communicating in Polish (not directly to a sentient/sapient lifeform unless said lifeform is interfering with the SCP-XXXX instance).
I would cut out the parenthesis content.
This is when the mole calls in other SCP-XXXX's to collect rocks, parts of wire and metal from within the underground tunnel system. Upon the collection of these resources, the moles attempt to create a base on the surface. Usually, only 1 to 2 SCP-XXXX instances create bases, with the rest hiding beneath the surface.
The series of events here is very vague and poorly worded. I suggest something like "After emerging, one or two SCP-XXXX instances will attempt to erect a structure made of wire, refuse, and other similar components. "
It is currently unbeknownst to the Foundation
Unbeknownst—-> unknown
Also, didn't you say this earlier? The fact that the Foundation doesn't know how they learned to speak Polish?
Other Assorted Thoughts
I hope this does not come off as rude, but is English your native language? I only ask this because of some odd verbiage and a few grammatical errors here and there which wouldn't be typical to one fluent in the English language.
I highly suggest you use Grammarly for help in such things, as it will help you correct a sentence if its strucure/verbiage is incorrect.
Overall
This is very cute. I love the concept but its a little weighed down by execution. There's many tonal hiccups and like I mentioned earlier, odd word choices. Though the anomaly itself isn't really too interesting, it's okay because the story you're telling is very charming and adorable, but could also use some additional touch ups.
I think it'd be good for us to know why the moles are doing what they're doing, or alternatively, paint them as brave little goofs simply trying to explore the scary bright world. You got down their personalities, but they still need motive.
I love this very much and am very eager to see this grow.
Useful Links
Grammarly.com is a life saver for helping with spelling, grammar, and syntax errors. And it's free!
So you want to write a humanoid essay, a very useful essay on writing humanoids.
Not Enough Characters a guide on how to not write humanoids, but characters!
Clinical Tone Info
More Clinical tone info
And finally, the Site's Clinical Tone Guide
Have a song for your hearing pleasure.
If you have any questions please don't be afraid to PM me.
and that's all I wrote.