Supporting Documents How to Guide - Access septic records online through Clatsop County Webmaps Database 74.39 KB Licensed Septic Installers & Pumpers Serving Clatsop County 134.65 KB Operation and Maintenance Guide for Pressurized Systems (ATT, Sand Filter) 187.58 KB Operation and Maintenance Septic Providers Serving Clatsop County 170.02 KB Septic System Installation Setbacks Guide - Minimum distances 50.79 KB Installing a New Septic System DEQ Guide 208.86 KB Print