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Alder ConstructionLicensed

Name: Alder Construction
Address: WA

Licensed septic contractor in Washington

License details

License type	O&M Inspector · Installer
License status	Active, Clark County certified O&M inspector; Active, Clark County certified installer
State	Washington
Licensed by	Clark County

What this license covers

Installation / repair: licensed to build and install septic tanks and drainfields, and to repair or replace failed ones.
Inspection: licensed to inspect existing septic systems; the license you want for a home-purchase inspection.

How to verify this license

We publish the license details exactly as they appear in the public licensing records of the agency that issued the license; we do not vouch for the business itself. Before hiring, look up this license directly with the agency that issued it, confirm it is still active, and ask for a current certificate of insurance.

Source: Clark County Public Health - Certified O&M Inspectors + Clark County Public Health - Certified OSS Installers, last checked 2026-08-19. Look it up at the issuing agency.