I have a question about RESRAD and tritium. When we enter the tritium concentration in pCi/g, is this pCi per gram of water, or tritium per gram of soil, or what? Thanks, mike Mike McNaughton Los Alamos National Lab. email: mcnaught at LANL.gov or mcnaughton at LANL.gov phone: 505-667-6130; page: 505-664-7733