During a routine pre-employment drug screening, you collected a urine specimen from an applicant. After properly labeling the specimen, what is the MOST appropriate next step to ensure the integrity of the chain of custody?
Ask a coworker to witness you placing the specimen in a regular plastic bag.
Place the specimen on your desk while you complete the paperwork.
Secure the specimen in a tamper-evident bag and store it in the designated secure area.
Put the specimen into the general refrigerator until the courier arrives.