Per – and Polyfluoroalkyl Substances Characterization Study Work Plan Addendum

Lower Issaquah Valley
Issaquah, Washington
Farallon Consulting, L.L.C.
April 3, 2020

Introduction

Farallon Consulting, L.L.C. (Farallon) has prepared this addendum (Addendum) to the Per- And Poly-Fluoroalkyl Substances Characterization Study Work Plan, Lower Issaquah Valley, Issaquah, Washington dated 2018, prepared by Farallon (2018) for Eastside Fire & Rescue (EFR) (Work Plan), to present the work elements and rationale to further characterize the nature and extent of per- and poly-fluoroalkyl substances (PFAS) in soil and groundwater in a portion of the Lower Issaquah Valley in Issaquah, Washington (Figure 1).

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