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Response Level. Changes to the Response Level presents the greatest risk to the City for bridging the time needed to implement a long-term solution. d. Coordinate with Zone 7 on their future PFOA and PFOS testing and operational strategies to confirm that water being supplied into City's distribution system via turnouts is below Response Levels. e. Support Zone 7 and DDW groundwater basin monitoring efforts to identify potential sources of PFOA and PFOS in the region. 2. Public Notification: Staff has placed Well 8 as the last priority to operate but has not filed the well as inactive or standby with DDW. Therefore, effective January 2020, the City is required to communicate Well 8 test results with customers per requirements of Assembly Bill 756. Regardless of this requirement, staff initiated the public notification process as follows: a. Prepared a City website posting that provides information on PFAS including City and Zone 7 test results. This also meets the requirements of Assembly Bill 756. The City's website posting is currently active. b. Mailed each customer receiving a utility bill a brochure on PFAS with information similar to that on the website. Additionally, the same brochure will be emailed to account holders for which the City has an email address on file. These forms of notification also meet the requirements of Assembly Bill 756. The brochure is anticipated to be received by customers in November 2019. c. Included information on PFAS in the Pleasanton Progress Newsletter, mailed to residents and businesses in October 2019. d. Include 2019 PFOS and PFOA test data by the City and Zone 7 in the 2019 CCR to be prepared next year. This will also meet the requirements of Assembly Bill 756. Recommended Long-Term Actions Reserving Well 8 as a last priority well to operate to meet water demands is not considered a viable long-term solution to address PFOA and PFOS issues when considering long-term reliability of the water distribution system and ability to meet future PFOA and PFOS regulations that appear to be getting more stringent as time moves forward. Therefore, the following are staff recommendations for long-term actions: 1 . Evaluate PFAS Treatment at Wells 5, 6, and 8. The City is currently under contract with Carollo Engineers to perform the Water Quality Evaluation Project which includes performing a facility assessment of Wells 5, 6, and 8 and providing recommendations on needed improvements to extend the useful life. Staff has amended Carollo's current contract to additionally evaluate the feasibility of implementing PFAS treatment systems. The scope of work for this study includes the following: • Groundwater quality review • Establish treatment target goals for evaluation that may include: Page 10 of 13