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plume contour figures for reference). GSH would continue to sample these wells annually in accordance with the MRP to provide data for plume containment and minimize disturbance to the new property owners. • Destroy well cluster PW08 (shallow and deep only). With PW09 and PW07 generally upgradient and PW10, PW26 and PW22 clusters downgradient, the PW08 well cluster does not appear necessary to monitor the plume. Remove extraction wells EW-04 and EW-04A. Well EW-04 is not being used and there is no plan to use it in the near future. EW-04 was taken off-line in 2009 to focus extraction in the sulfolane source area. EW-04A has only been operated minimally since 2014 and is not required for continued plume remediation or hydraulic control as groundwater is captured by the downgradient pumping center (EW-06, EW-14B and EW-08B). • Remove shallow injection well INJ-14 and associated piping. Deep injection wells IW-1 and IW-2 perform very well with no diminished capacity over the years. Shallow INJ-14 has never been used and there are no plans to utilize this injection well in the future. Upon your approval of this proposed plan, we will coordinate with the current property owner and prospective buyer to protect well cluster PW09 and destroy the remaining wells and associated piping Please let us know if you would like a call to discuss these plans and how you would like us to proceed. Thank you. Jenifer Jenifer J. Beatty PG, CHG I Program Manager, Vice President I Jenifer.Beatty@arcadis.com Arcadia 101 Creekside Ridge Court, Suite 200 Roseville CA I 95678 I USA T. +1 916 786 7971 I M. + 1 916 747 7971 Professional Geologist / PG-CA, #6650, Certified Hydrogeologist/ CHG-CA # 569 Connect with i is! arcP.clit=:.com LinkedIn I Twitter I Facebook ARCADIS r.174,:rds.svrrY Be green, leave it on the screen. This email and any files transmitted with it are the property of Arcadis and its affiliates. All rights, including without limitation copyright, are reserved. This email contains information that may be confidential and may also be privileged. It is for the exclusive use of the intended recipient(s). If you are not an intended recipient, please note that any form of distribution, copying or use of this communication or the information in it is strictly prohibited and may be unlawful. If you have received this communication in error, please return it to the sender and then delete the email and destroy any copies of it. While reasonable precautions have been taken to ensure that no software or viruses are present in our emails, we cannot guarantee that this email or any attachment is virus free or has not been intercepted or changed. Any opinions or other information in this email that do not relate to the official business of Arcadis are neither given nor endorsed by it. 2