Document 6RBoZ0BBLeQJk75r1EyadvVgR

US :PA Office or W jte r Sierra Club v. EPA 18cv3472 NDCA Tier 10 ED 002061 00270544-00001 UCMR Background 1996 SDWA amendments established data driven approach to evaluate unregulated contaminants that includes: 11 Contam inant Candidate List (CCL) UCMR 11 Regulatory Determ ination UCMR Objective: 11 Collect nationally representative drinking w ater occurrence data on priority unregulated contaminants 11 Data used to support EPA decisions on actions to protect public health 11 Provide data to states, local governments and to the public for their use in decisions regarding public health protection Sierra Club v. EPA 18cv3472 NDCA Tier 10 ED 002061 00270544-00002 UCMR Contaminant Prioritization and Selection Process Sierra Club v. EPA 18cv3472 NDCA Tier 10 ED 002061 00270544-00003 UCMR 4 Analytes "total microcystins" microcystin-LA microcystin-LF microcystin-LR microcystin-LY i microcystin-RR | microcystin-YR I nodularin anatoxin-a cylindrospermopsin germanium [ manganese butylated hydroxyanisole o-toluidine quinolone i , , aipha-hexachlorocyclohexane . profenofos chlorpyrifos i tebuconazole ! dimethipin ! total permethrin (cis- & trans) | ethoprop | tribufos ! oxyfluorfen -------:.................................................. HAAS (regulated) HAA6Br HAA9 ........ 1.................................................. | 1-butanol | 2-methoxyethanol i 2-propen-l-ol Sierra Club v. EPA 18cv3472 NDCA Tier 10 ED 002061 00270544-00004 UCMR Analytical Methods Pre-rule-development stakeholder meeting (2-3 years prior to proposal) to discuss methods for unregulated contaminants Focus on robust, validated methods suitable for national, large-scope monitoring Consider cost-effectiveness (including ability to measure multiple analytes of interest) Consider method sensitivity, relative to available health effects information Public com m ent on methods invited in conjunction with UCMR proposal 5 Sierra Club v. EPA 18cv3472 NDCA Tier 10 ED 002061 00270544-00005 UCMR Laboratories EPA administers laboratory approval for UCMR o State laboratory certification programs generally don't address new UCMR methods " To receive/maintain approval, labs must: o Be certified for one or m ore com pliance m onitoring param eters o Perform initial dem onstration of capability (including ability to m eet M in im um Reporting Levels) and successfully participate in EPA's Proficiency Testing study o Participate in on-site a n d /o r rem o te audits by EPA o A dhere to Quality Assurance (Q A )/Q u ality Control (QC) measures in the methods, rule language and the UCMR 4 Laboratory Approval Manual o Post analytical results and required QC data via web-based reporting system ("SDWARS") within 120 days of sample collection Sierra Club v. EPA 18cv3472 NDCA Tier 10 ED 002061 00270544-00006 State Engagement/Partnering UCMR was established as a direct-implementation program EPA leads oversight Significant engagement and support from states/territories through voluntary, customized "Partnership Agreements/' which can include: Reviewing State M onitoring Plans (identify participating public w a te r systems (PWSs)) Providing sample-location inventory inform ation Initial notification of PWSs Reviewing groundw ater representative m onitoring plans Assisting with sample collection Following up w ith PWSs regarding m onitoring responsibilities Other support 47 states/territories partnering with EPA for UCMR 4 States continue to be able to review data via SOWARS prior to public release (state must establish SOWARS account) Sierra Club v. EPA 18cv3472 NDCA Tier 10 ED 002061 00270544-00007 Communicatinq UCMR Results Laboratories report results to large PWS (via SDWARS) within 120 days of sample collection (EPA's contract laboratories report small-system results to EPA for EPA review) Large PWSs have 60 days to review results posted by lab and take action; results not reviewed in the period default to "approved" and become available (via SDWARS) for review by EPA and states; EPA and states have ongoing access to approved results in SDWARS Beginning ~fall of first-year monitoring (e.g., 2018 for UCMR 4), EPA posts compilation of detailed UCMR results (along with a Dota Summary) to publically- available National Contaminant Occurrence Database (NCOD) EPA updates NCOD ^quarterly thereafter 11 EPA posts final UCMR data set to NCOD ~1 year after the end of the monitoring period PWSs must identify UCMR detections in annual Consumer Confidence Reports Sierra Club v. EPA 18cv3472 NDCA Tier 10 ED 002061 00270544-00008 4>EPA UCMR "Reference Concentration UCMR minimum reporting levels (MRLs) are based on capability of the methods UCMR "reference concentrations" are based on published health-effects information, where available, from: CCL Contaminant Information Sheets; EPA Drinking Water Standards and Health Advisories document; Human Health Benchmarks for Pesticides; CCL Regulatory Determinations; and Integrated Risk Information System (IRIS) Purpose is to aid in the interpretation of the UCMR results EPA will consult with states (as we did for UCMR 3) in developing the reference concentrations (and accompanying narrative) for UCMR 4 UCMR Data Summary displays results relative to reference concentrations and includes an explanation of their origin/significance o The reference concentration should not be interpreted as any indication of Agency intent to establish a future drinking water regulation at this or any other level Additional sources of information regarding critical studies, other health effects, chemical properties, sources, exposure, etc. include: Integrated Risk Information System; Office of Pesticides Programs; Agency for Toxic Substances and Disease Registry Sierra Club v. EPA 18cv3472 NDCA Tier 10 ED 002061 00270544-00009 UCMR Contacts UCIVIR Questions/SDWARS Data Entry? * UCMR Message Center: (800) 949-1581 CDX Help? * SDWARS registration and technical issues * Provide details and screen shots o CDX Help Desk: (888) 890-1995 Lab Approval Program: Safe Drinking Water Questions? * Safe Drinking Water Hotline: (800) 426-4791 Sierra Club v. EPA 18cv3472 NDCA Tier 10 ED 002061 00270544-00010