Island County Pressure Septic Design

I’m ready to move from site registration to a full, permit-ready septic design for our property in Island County, Washington. The system must be a pressure distribution setup. So far I have current site plans and the health department’s registration paperwork; soil logs show a sandy/loamy profile. What I need from you: a complete engineered package that satisfies Island County Health Department requirements—tank sizing, pump and alarm specs, lateral layout with dosing calculations, reserve area, construction notes, and an O&M plan. Final drawings should be delivered in both CAD and PDF, stamped for Washington State if you’re licensed here (or coordinated with a local PE for stamping). I’ll supply the site plans, test hole data, and any additional records you request. Please outline your approach, estimated timeline, and previous experience with pressure distribution systems in Washington when you respond.