SANDY BEACH CLEANUP: Sierra Club service project, 8:30-10:30 a.m. today, starting at the east side of Sandy Beach Park. Bring water, hat, sunscreen and closed shoes. Bags, gloves provided. Participants under 18 must have a waiver signed by their legal guardian. Information: Deborah Blair, 955-4168.

SEA LEVEL RISE TALK: Chip Fletcher, chairman of the University of Hawai'i Department of Geology and Geophysics, will speak at 11 a.m. Friday on "The Science of Sea-Level Rise and a Review of the Status of Kailua Beach." Hosted by the Lani-Kailua Outdoor Circle at the Kane'ohe Yacht Club; $20. For reservations, e-mail Carol Arnote at carnote@hawaiiantel.net.

KAWAI NUI GARDENING: Na Pohaku o Hauwahine service project with Sierra Club and Ahahui Malama i ka Lokahi. Meet at 8:30 a.m. Saturday on the makai side of Kapa'a Quarry Road about one mile from the intersection of Kapa'a Quarry Road and Kalaniana'ole Highway. Bring work gloves, water, lunch, insect repellent and gardening tools. Arlene Buchholz, 988-9806.