Shadowbox Construction Company Constructs eco-sustainable net energy garden systems such as composters, seed trays, furrow rakes, germination tables, potato barn, more. Website: www.whiteholecomposter.com/Email: info@whiteholecomposter.comPhone: 510 237-9748Mailing Address:6015 Monterey Ave.Richmond, CA 94805-1224Date Updated: 2/5/2010