Attachment_6_Project_Drawings_and_Photos.pdf

This file is Attachment 6 to a federal contract opportunity for rehabilitating a log cabin drainfield at Olympic National Park (OLYM), contract number 140P8326Q0021. The attachment contains as-built record drawings and construction photographs documenting the drainfield system design and installation.

The project involves a subsurface drainfield system comprising five disposal zones (Zones 1-5) with Geoflow Wasteflow PC dripline technology. The system includes 2-inch PVC inlet feed headers and 1.5-inch PVC flush return lines serving Zones 1 through 4, which are centrally located in a common trench. Each zone features subsurface dripline with looped ends between connection points. The design includes air relief and vacuum breaker components for Zones 1 and 3, check valves, and a dosing building with potable water supply. The plan view drawing indicates specific measurements and layout specifications, with the drainfield spanning approximately 100 feet in length and incorporating multiple disposal zones configured across the site. The construction photographs show the Zone 1 dripline layout prior to end loop installation, the central PVC header and flush return line infrastructure, and the completed subsurface dripline connections with looped configuration. This attachment serves as a technical reference for the as-built conditions of the drainfield rehabilitation project.