About

Welcome to Apex Septic Design, owned and operated by Larry Purdum. Our goal at Apex is to provide you with the best septic design and maintenance services possible. We are licensed Washington State Onsite Wastewater Treatment System Designers with over 10 years of experience in the Western Washington septic design and maintenance industry. We are Puget Sound natives and avid outdoorsmen, which gives us knowledge and understanding of the soil, water, and weather conditions that affect septic system design and maintenance in the Puget Sound area.

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