Washington, Spokane Septic System advice and regulation Washington State Wastewater rules and regulations at https://www.doh.wa.gov/CommunityandEnvironment/WastewaterManagement/RulesandRegulations West Virginia Septic Codes, Rules, Design Guides WEST VIRGINIA ES-52 INDIVIDUAL & ONSITE SEWAGE SYSTEM DESIGN...
Orenco is cited below. Illustration as shown here - R.C. Worst & Company Inc. 625 E. Best Avenue Coeur d'Alene, Idaho 83814 USA, Tel: 855.329.4519 other offices in Spokane WA & Idaho Falls ID. Email: customer.service@rcworst.com, original source: https://www.rcworst.com/AdvanTex-su...