I won't claim to be an expert, here, but in the course of my employment, I have reviewed/analysed tens of thousands of toxicology reports, so I have a great deal of experience. My two cents worth is as follows:
First off, they likely won't find any THC in your system, but they might find 11-hyroxy-thc, a thc metabolite. Cannabinoids are lipophillic (I.e. Fat soluable) so urine tests usually don't find great amounts, if any at all. (They could find some metabolites, if administered shortly after consumption, but if you abstain for one week, any remaining metabolite would not be hanging around in your urine in great amounts for that long) Blood/saliva tests?....maybe...Again, if you have abstained for longer than a week, it is doubtful they would find any. Indeed, I would challenge any of these findings as "false positives"....but the employer, who may not be scientifically literate, might not buy into that argument.
I am not saying that it is impossible that they will find any metabolites, but the likelihood greatly decreases over time.
If you have a week, then, abstain and do not hang around friends or anyone who is smoking.
Second, if any metabolites were found, since you live in a legal recreation state, you could claim that you were at a party around people who were using. This could buy you time, possibly for a second test if any metabolites were found....in which case you would abstain so next test you come out clean.
Another issue is that you could claim you are taking meds which show up as a false positive on the thc test.....I won't say which ones, so that this excuse does not become common place and hence no longer works....hint: look up treatments for GERD.🤔
If you can have a good argument for false positive results, you might a get a second chance....and that means layoff until,you sign the contract.
Note: Some tests are, indeed super sensitive, but often those super sensitive tests also give rise to the greatest numbers of false positives, so, paradoxically, in some cases, they could be the least accurate.
Tests which might be highly reliable for cannabinoids (I.e. Liver samples) are not going to be taken from living subjects. 😉 Even blood samples, would be a rare type of test to administer. Any time someone is going to jab a needle into your arm, an intelligent person would refuse such a test unless it was administered by a licensed medical person, such as a nurse or physician.