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Table 3 — Cit Testing <br /> Well 1st Quarter (ppt) 2nd Quarter (ppt) <br /> Location April 19 — June 19 July 19 — September 19 <br /> PFOS <br /> Well 5 31 22 <br /> Well 6 26 22 <br /> Well 8 115 100 <br /> PFOA <br /> Well 5 4.2 3.7 <br /> Well 6 3.8 3.3 <br /> Well 8 8.8 8.3 <br /> PFOS & PFOA Combined <br /> Well 5 35.2 25.7 <br /> Well 6 29.8 25.3 <br /> Well 8 123.8 108.3 <br /> All three wells tested above the Notification Level for PFOS at the time of testing with <br /> Well 8 testing above the combined PFOA and PFOS Response Level. Upon initial <br /> (unconfirmed) test results, staff immediately placed Well 8 into the last priority facility to <br /> operate when trying to meet water demands. As a result, Well 8 has not operated since <br /> receipt of the initial test results and is only anticipated to operate under abnormal <br /> conditions such as extreme peak demand periods or if there are failures of other supply <br /> facilities. <br /> Once the test results were confirmed, staff notified City Council by memorandum on <br /> July 19, 2019 as required by law. In addition, the test results were shared with Zone 7 <br /> who is conducting a groundwater basin monitoring program to verify detections and <br /> evaluate potential contamination sources. <br /> CONCLUSION <br /> Near-Term Actions Taken <br /> The following are actions taken by staff to address the impact of PFOA and PFOS on <br /> the City's water quality: <br /> 1. Operation Strategies: Continue to implement current operational strategies <br /> summarized below: <br /> a. Conduct quarterly PFOA and PFOS testing at Wells 5, 6, and 8 and notify <br /> City Council of results. The next set of testing is anticipated to occur late <br /> November 2019. <br /> b. Placed Well 8 as the last priority well to operate to meet water demand. <br /> Continued use of this strategy is dependent on contaminant levels at Wells 5 <br /> and 6 remaining below the Response Level so those wells can remain in <br /> service to meet normal dry weather demands. This is considered a short-term <br /> solution while long-term solutions can be investigated and implemented. <br /> c. Monitor anticipated changes by DDW to Response Levels expected by end of <br /> 2019 to determine if Wells 5 and 6 can continue to operate below the <br /> Page 9 of 13 <br />