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2. Per- and polyfluoroalkyl substances in source and treated drinking waters of the United States
3. California Office of Environmental Health Hazard Assessment. (2019).Notification level recommendations perfluorooctanoic acid and perfluorooctane sulfonate in drinking water.
4. California State Water Resources Control Board. (2019).Water Code Sections 13267 and 13383 order for the determination of the presence of per‐ and polyfluoroalkyl substance at Chrom Plating Faciilities Order WQ 2019‐0045‐DWQ.https://www.waterboards.ca.gov/pfas/docs/pfas_final_order_chrome_plating.pdf.
5. California State Water Resources Control Board. (2020).Target reporting limits for LC/MS/MS analysis of per‐ and polyfluorinated alkyl acids by Department of Defense Quality Systems Manual5.1.https://www.waterboards.ca.gov/pfas/docs/reporting_limits_dod_qsm_v5_1_or_later_oct_14_2020.pdf