Note: As you're probably able to figure out, the rephrased sentences are suggestions in order to improve tone/sentence structure.
Neutralised (formerly Keter)
I'm pretty sure that this is a stylistic choice more than a rule, but you don't necessarily have to mention the former class here.
The remains of SCP-XXXX are to be closed off from public access.
Sure, but how? Do you want to fence it off? Do you want to post guards? Do you want to plant a minefield?
Inspection must take place every day to ensure that there are no SCP-XXXX-2 instances in the wreckage.
to confirm the presence or absence of SCP-XXXX-2 instances in the wreckage?
Should any SCP-XXXX-2 instances be found in the wreckage,
Should presence of an SCP-XXXX-2 instance be confirmed?
SCP-XXXX is to be immediately upgraded to Keter and Procedure 9-OMEGA is to take place in an attempt to destroy all surviving SCP-XXXX-2 instances.
Classification will elevate to 'Keter' and Procedure 9-OMEGA is to be enacted immediately?
SCP-XXXX is to be closed off from public access. Any unauthorised persons found attempting to enter SCP-XXXX-1 are to be terminated immediately.
Whew, harsh. How are we able to cover up killing civilians like this?
The area surrounding SCP-XXXX-1 must be inspected constantly for SCP-XXXX-2 instances.
So 24/7? Isn't it easier to just install a monitoring system then?
Should SCP-XXXX-2 instances be found, full lock-down of the area must happen,
A full lock-down of the area must happen is to take place?
Every three (3) days, an approved neutralisation attempt must occur;
We don't do the number (#) thing anymore.
Should any personal be found containing SCP-XXXX-2 instances, they are to be immediately terminated by incineration1.
Personnel*
Anyone found entering SCP-XXXX-1 without proper authorisation is to be declared dead, and no recovery attempts are to be made.
Treated as KIA?
and psychological counseling must be provided to anyone who has read any writing.
Has been exposed to anything written by SCP-XXXX-2, regardless of time viewed?
Any personal tasked with inspecting SCP-XXXX-1 are to be equipped with the following:
Personnel*.
One (1) flamethrower, equipped with twenty (20) minutes of fuel
It might be better to just state fuel capacity.
Personal are to maintain radio contact
Okay, just replace every instance of 'personal' with 'personnel'.
Should 3 hours pass without personal failing to report,
Double negative (without and failing).
Should 3 hours pass without reporting back*…
-7°C (19.4 F).
We only use Celsius or kelvin, I believe.
Attempts to significantly alter this temperature have so far proved unfruitful.
Has so far been unsuccessful?
Aside from this, SCP-XXXX-1 is an otherwise normal hospital; apart from it being the habitat of SCP-XXXX-2.
Aside from this, SCP-XXXX-1 is an otherwise normal hospital that forms the habitat of SCP-XXXX-2?
and can be squashed like any other non-anomalous spider,
Are no more resistant to physical damage than non-anomalous specimen of their kind?
due to the extreme population of SCP-XXXX-2 instances however;
Numerous instances [ESTIMATION OF SPECIMENS NUMBERS HERE]?
Flamethrowers are best advised as the method of terminating instances.
Have so far been the most effective method of neutralization?
