First conditional or conditional I refers to a pattern used in predictive conditional sentences, i.e. those that concern consequences of a probable future event (see Types of conditional sentence).irst conditional or conditional I refers to a pattern used in predictive conditional sentences, i.e. those that concern consequences of a probable future event (see Types of conditional sentence).
Each federal agency is required to have blind samples (i.e., negative samples, positive samples, 1  adulterated samples, substituted samples) submitted along with the donor specimens. The. blind samples may be purchased by the federal agency and supplied to the collector, or.
When the drug screen is performed in the laboratory, the drug screen results take 24 to 48 business hours after specimen collection. If the drug screen is non-negative, the result and specimen will then need to be confirmed. Confirmation takes an additional 48 to 72 business hours after the screen is completed.