Final answer:
The statement 'Absorbed bench covers should be changed weekly' is not true, as bench covers should be changed more frequently especially if contaminated to maintain cleanliness.
Step-by-step explanation:
The statement that is NOT true is a) Absorbed bench covers should be changed weekly. In a laboratory or healthcare setting, guidelines for maintaining a sterile environment are stringent. Work surfaces should indeed be cleaned immediately when visibly contaminated and gloves should always be worn when disinfecting work surfaces to avoid direct contact with harmful pathogens. Additionally, it's not only suggested but often required, that work surfaces be cleaned at least once per shift with suitable disinfectant to minimize the risk of any potential contamination. Bench covers or absorbent bench protectors should typically be changed more frequently than weekly, especially if they are contaminated, to maintain the highest level of cleanliness and prevent microbial transmission.