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Table 5-1 - Groundwater Preliminary Cleanup Levels <br />Project No. 190583, K-C Worldwide Site Upland Area, Everett, Washington <br />Surface Water, <br />Aquatic Life - <br />Predicted <br />Protective <br />Concentrations <br />(IM #23) <br />(ma-wac)(ma-cwa 304a)(draft IM23)(hh-cwa 304a)(hh-wac)(hh-cwa 303c)(sw-b)(hh)(pot)(vi-c)(pql) <br />Potable <br />Groundwater <br />Screening <br />Levelc <br />Aquatic Protection <br />Groundwater <br />Preliminary Cleanup <br />Level and Basis <br />Surface Water <br />ARAR - Human <br />Health - Ch. 173- <br />201A WAC <br />APPLICABLE GROUNDWATER CRITERIA <br />Marine Surface Water Criteria for Establishing Method B Surface Water Cleanup Levelsa <br />Groundwater <br />Screening <br />Level <br />Protective of <br />Vapor <br />Intrusion for <br />Industrial Use <br />(Method C)a <br />Surface Water <br />ARAR - Aquatic <br />Life - Ch. 173- <br />201A WAC <br />Surface Water <br />ARAR - Aquatic <br />Life - National <br />Recommended <br />WQ Criteria <br />(CWA 304a) <br />Applicable <br />Practical <br />Quantitation <br />Level (PQL)d <br />ANALYTE (BY GROUP) <br />Human Health Protection <br />(marine) <br />Surface Water Screening <br />Level for Marine <br />Protection <br />Surface Water, <br />Method B Human <br />Health, Most <br />Restrictive, <br />Standard <br />Formula <br />Surface Water, <br />Method B Human <br />Health, Most <br />Restrictive, <br />Adjusted for <br />ARARsb <br />Surface Water <br />ARAR - Human <br />Health - National <br />Recommended <br />WQ Criteria <br />(CWA 304a) <br />Surface Water <br />ARAR - Human <br />Health - 40 CFR <br />131.45 <br />(CWA 303c) <br />Polychlorinated Biphenyls (PCBs) <br />Total PCBs in ug/L (Sum of Aroclors)0.03 0.03 6.4E-05 1.7E-04 7.0E-06 1.0E-04 7.0E-06 7.0E-06 (hh)0.05 0.05 (pql) <br />Total PCBs in ug/L (Sum of Congeners)0.03 0.03 6.4E-05 1.7E-04 7.0E-06 1.0E-04 7.0E-06 7.0E-06 (hh)0.0091 0.0091 (pql) <br />Dioxins/Furans <br />Total 2,3,7,8 TCDD (TEQ) in ug/L 5.10E-09 6.4E-08 1.4E-08 1.0E-08 5.10E-09 5.1E-09 (hh)6.3E-05 6.3E-05 (pql) <br />Notes: <br />Preliminary cleanup levels are presented for compounds that were detected in either soil or groundwater during collection of data used in the RI (2012-present). <br />a Criteria values obtained from Ecology's CLARC database in May 2021 or Ecology Draft Implmentation Memo #23 (January 2021) <br />b <br />c <br />d <br />e <br />f Formaldehyde value based on protection of aquatic life (Anchor Environmental, 2008). <br />Based on background groundwater concentrations in Washington state (WAC 173-340-900, Table 720-1). <br />Analytical method reporting limits. PQLs for total cPAH (TEQ) and total TCDD (TEQ) are adjusted for TEFs. <br />Surface water Method B human health levels established using the standard Method B formula in MTCA were compared to state and federal human-health-based ARARs. The most stringent ARAR that is sufficiently protective under MTCA (i.e. less than a risk of 10-5 and a <br />hazard quotient of 1) is selected as the screening level for human health protection (hh ). If there are multiple contaminants, then the cumulative risk and HI must not exceed a risk of 10-5 or a hazard index of 1. <br />Upland Area groundwater is not a practicable source of potable groundwater, but, for the purposes of the RI, potable groundwater screening levels are applied for those compounds without a marine surface water screening level. <br />Aspect Consulting <br />6/22/2021 <br />P:\121\049\T\reference docs\Tables 5-1 thru 5-4 - Prelim CULs <br />Table 5-1 <br />K-C Upland Area RI/FS <br />Page 3 of 3