RESSAC a/c tech dispatched back to Chula Vista, CA, for a second reported leaky condensate at a healthcare provider. Technician located the leak location, found unit that was serviced the day before working normally without leaks. Inspected area, found water marks near the ductwork in the ceiling several feet from air conditioner. Recommended to customer to send out a roofer to inspect the roof and possibly patch leaking areas.