Petty Officer 2nd Class Marsha L. Hubert (left), From Discovery Bay, Calif., a preventive medicine technician with Public Health and Preventive Medicine Detachment, Alpha Surgical Company, 2nd Marine Logistics Group (Forward), observes as Cpl. Justin M. Cannady (right), from Aurora, Colo., a water support technician with 7th Engineer Support Battalion, 2nd MLG (Fwd.), test the water during an occupational environmental health site assessment June 29, at Forward Operating Base Zeebrugge, Afghanistan. Over the past few months, the sailors completed 50 site surveys providing critical medical data for future reference.