Contrary to popular belief, there is no meaning attributed to the intensity or width of a line. Even synthetic urine controls (which contain no drug metabolites at all) can produce a faint line on an assay. A faint line is still a line, which is a negative. And a negative is a negative.

BTW, drinking fluids is only helpful on the day of the U/A. Drinking a bunch of fluids in the days leading up to the U/A is useless. Drinking fluids only serve to dilute (thin out) the THCA concentration to where a urine sample can register a negative on an assay. The dilution phenomena is only temporary - once the fluids ingested had all been urinated out, the bladder is replenished with fresh THCA-laden urine by the kidneys, and thus the donor would resume testing positive for THC.

For more info, do a Forum Search with the terms "drinking water soluble dilute" and "kidneys work better filteration rate"

Also, do a Forum Search with the terms "first urination worst case scenario"