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Prop 65 Notification - 3 - 30 July 2021 <br /> Stockton Municipal Airport <br /> PFAS <br /> USGS-375339121150301) and seven municipal wells (ESJFP-08, 3910012-004, <br /> 3910012-005, 3901284-001, 3301564-001, 3901471-001 and 3901471-007). <br /> Table 3. "PRA 1" Analytical Results Summary for PFOA and PFOS in <br /> Groundwater <br /> Table 3:"PRA 1"Analytical Results Summary for PFOA and PFOS in Groundwater n /L <br /> Groundwater PFOA PFOS <br /> Sample Identification PRA Sample Collection Date Direct Exposure ESL Direct Exposure ESL <br /> 0.54 1.7 <br /> TW-4 1 6/22/2020 89 2300 E <br /> TW-5 1 6/22/2020 1500 E 13000 E <br /> TW-6 1 6/23/2020 1 28 64 <br /> E=The Reported Value Exceeds Linear Range <br /> ng/L=Nanogram per Liter <br /> PFOA-Perfluorooctanoic acid <br /> PFOS=Perfluorooctanesulfonic acid <br /> PRA=Potential Release Area <br /> ESL=San Francisco Bay Regional Water Quality Control Board Environmental Screening Level <br /> Central Valley Water Board staff will continue to send information as it becomes <br /> available from future investigations at the airport. In the meantime, Central Valley Water <br /> Board staff are open to continued dialogue or meetings with the County to further <br /> discuss PFAS impacts in the vicinity of the airport and next steps. <br /> If you have any questions, please contact Amber Ginorio at (916) 464-4670 or by email <br /> at Amber.Ginorio(a)waterboards.ca.gov. <br /> �SS�pNAI GFO <br /> OA <br /> o Na 8585 • <br /> CHRISTOPHER FLOWER, PG <br /> Supervising Engineering Geologist <br /> Site Cleanup Section <br /> REFERENCES <br /> BSK Associates. 2020. Preliminary Site Investigation for PFAS, Stockton Metropolitan <br /> Airport (SCK), Stockton, California, BSK Project E20-016-01 F. December 4. <br /> Cc: <br /> Russell Stark CM, Director, Stockton Metropolitan Airport, RStark sjgov.org <br /> John Murphy, Central Valley Water Board, John.Murphy(a)-waterboards.ca.gov <br /> Christopher Moskal, Central Valley Water Board, <br /> Christopher.Moskal(a)-waterboards.ca.gov <br /> Amber Ginorio, Central Valley Water Board, Amber.Ginorio(ab-waterboards.ca.gov <br /> San Joaquin County Environmental Health Department, kblackwell(a)-sjgov.org <br />