Farallon Consulting, L.L.C. is an environmental consulting firm with headquarters in Issaquah, WA and branch offices in Washington, Oregon, and California. During its 20-year history, Farallon has served over 1,500 clients throughout the United States, meeting environmental needs ranging from due diligence and site characterization through engineering design and remediation; landfill services; stormwater compliance and permitting; water resources; sediment management; and technical support for mediation and litigation.