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Brian L. Hewitt Engineering specializes in designing, inspecting, and starting up on-site waste (septic) systems. With several years of experience, our team of experts offers services for the following counties: Cowlitz, Wahkiakum, Lewis, Pacific, and Skamania in SW WA. Our solutions include the design process, permitting, septic types, terms, maintenance, and more. We are licensed in WA & OR.