4-Approved Septic Design.pdf

This document is an On-Site Sewage System Permit and associated design documents for a residential septic system replacement at 5070 W Skokomish Valley Rd in Shelton, WA. The permit (SWG2025-00312) was submitted by Bryan James for Indian Health Services, with Arrow Septic Designs, Inc. as the septic designer. The project involves replacing an existing 4-bedroom septic system with a new 1,200-gallon 2-compartment septic tank, 1,200-gallon pump chamber, and a pressure distribution drainfield consisting of 4 laterals totaling 600 square feet. The system will use a spring water source, has an application rate of 0.8 gpd/ft², and is located approximately 300 feet from the Skokomish River. The permit was issued on 08/05/2025, expires on 08/23/2026, and includes specific installation requirements such as obtaining county approvals, installing with a certified installer, and following detailed technical specifications for drainfield layout and components.