Alexis Reandelar, 13 (middle) of Vacaville joins with several other swimmers Monday at the Walter V. Graham Aquatic Center after the complex opened again for lap swimming after being forced to close due to the COVID-19 pandemic. Swimmers are encouraged to register for the 45-minute session and the lanes to one person. (Joel Rosenbaum -- The Reporter)

Lifeguard, Keana Parry checks the temperature of a swimmer as part of the health screening process before they enter the pool for a Monday's lap swims at the Walter V. Graham Aquatic Center. (Joel Rosenbaum -- The Reporter)

Lifeguards, Daniel Raymond, 20 (left) and Laura Everett, 15 keep a close eye on swimmers at the Walter V. Graham Aquatic Center Monday after it reopened after being closed due to the global coronavirus pandemic. (Joel Rosenbaum -- The Reporter)

Lifeguard, Keana Parry checks in a swimmer for the first session of lap swimming Monday at the Walter V. Graham Aquatic center in Vacaville. Swimmers are encouraged to register online or at the Three Oaks Center for the 45-minute session and the lanes to one person. (Joel Rosenbaum -- The Reporter)

Monday the Walter V. Graham Aquatic Center reopened for lap swimming after being forced to close due to the global COVID-19 pandemic. Swimmers are encouraged to register online or at the Three Oaks Center for the 45-minute session and the lanes to one person. A health screening is also required for entry. (Joel Rosenbaum -- The Reporter)

Wearing a mask, lifeguard Daniel Raymond, 20 speaks with a swimmer Monday at the Walter V. Graham Aquatic Center after it reopened after being closed due to the global coronavirus pandemic (Joel Rosenbaum -- The Reporter)

Lifeguards, Laura Everett, 15 (left) and Daniel Raymond, 20 keep a close eye on swimmers at the Walter V. Graham Aquatic Center Monday after it reopened after being closed due to the global coronavirus pandemic. (Joel Rosenbaum -- The Reporter)

Swimmers are advised to wear their swimsuits upon entering, as the locker rooms are only open for washing hands and using the restroom. Outdoor showers are available for swimmers to rinse off before entering and after exiting the pool. (Joel Rosenbaum -- The Reporter)

Lifeguards Laura Everett, 15 keeps a close eye on swimmers at the Walter V. Graham Aquatic Center Monday after it reopened after being closed due to the global coronavirus pandemic. (Joel Rosenbaum -- The Reporter)

Social distancing reminders are painted on the pool deck around the Walter V. Graham Aquatic Center that reopened for lap swimming Monday after being closed due to the global COVID-19 pandemic. (Joel Rosenbaum -- The Reporter)