VANCOUVER Police departments, search and rescue crews and the Coast Guard are involved in the search for a B.C. woman who left home to go crabbing on Monday. The Delta Police Department said Wenyan Lan planned a solo excursion to find crabs and dig for clams on B.C. s coastline. She is believed to have headed to the Tsawwassen area in the late morning or afternoon. The 54-year-old Surrey resident did not return home, and her family reported her missing later that night. Her vehicle was found at Centennial Beach, so it appears she may have been in that area.