You are going to need to put in a bit more detail here. For starters, there are many tests that fall under the field of toxicology. Heavy metal blood/serum/urine/plasma screens, pesticide blood/serum/plasma/urine screens, urine drug screens, serum drug screens, emergency tox screen, etc. Some of these are for biological monitoring purposes and some are for STAT medical issues, etc. So, you need to say what type of tox testing this question is in reference to.
Also, can you clarify what you mean by "negative social impacts"? That too is a little broad. If you can add some more detail then we can better assist you.
Also, can you clarify what you mean by "negative social impacts"? That too is a little broad. If you can add some more detail then we can better assist you.