I did 3 backstone samples this summer and fall.
2 I sent in their prepaid envelope, those took about a month.
On the last one the Blackstone prepaid envelope went into the used oil drain pan via the wind, so I sent it FirstClass for about $3.65 and that one that took like 4 days to get results back.
2 I sent in their prepaid envelope, those took about a month.
On the last one the Blackstone prepaid envelope went into the used oil drain pan via the wind, so I sent it FirstClass for about $3.65 and that one that took like 4 days to get results back.
