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HomeMy WebLinkAboutC_Memo_stormwater_Boeing New Slot Drain_ Apron D _060321.pdf Copyright © 2021 Boeing. All rights reserved. June 2, 2021 To: Mark D. Clement Permit Specialist | Facilities Enterprise Operations | Finance and Sustainability The Boeing Co – Renton, King County & SEA-TAC, Moses Lake cc: Mark J. Loranger Renton Project Management | Facilities & Asset Management Supply Chain & Operations | Enterprise Services Subject: W7923590 – Apron D Slot Drain for Groundwater Runoff This memo is intended to emphasize the maintenance/repair nature of the Apron D Slot Drain for Groundwater Runoff project. The work depicted in the permit drawing package (sheets G0, C222, C293 and C506) is intended to provide a direct route for groundwater runoff to be fed into the existing storm water system via the existing Type 1 catch basin. Currently, groundwater is infiltrating the existing fuel spill containment vaults (URE-789 and URE-790) instead of being fed into the catch basin as intended. Temporary barriers have been set around the fuel spill containment vaults to direct water into the catch basin, however Boeing is looking to install a more permanent feature (slot drain at three sides) to allow the system to behave as designed. This scope of work will have no change in the amount, rate, or quality of stormwater runoff in the area.