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3rd Interim Action Construction Report <br />Kimberly-Clark Upland Site <br /> 0121049.080.084 <br />July 30, 2024 2-3 landauinc.com <br />• Polychlorinated biphenyls (PCBs) by EPA Method 8082. <br />Analytical results were evaluated against import fill criteria as presented in the Work Plan either by a <br />direct comparison to that criteria or using a statistical evaluation in coordination with Ecology. Import fill <br />evaluation data and initial evaluations are presented in contractor-provided memoranda in Appendix C; <br />this appendix also includes statistical evaluation worksheets, if used. <br />2.2.2.1 South Terminal Stockpile <br />Material from a soil stockpile located within the Port’s South Terminal was utilized for haul road <br />construction during placement of preload material. In accordance with import fill criteria presented in <br />the Preload Memo (dated April 6, 2021), which was included as an attachment to the Work Plan, import <br />fill characterization sampling was conducted to characterize the approximately 1,650-CY stockpile of <br />ballast rock, which had been stored at the Port’s South Terminal wharf area. Six representative samples <br />of the material were collected. Laboratory analytical results were screened against the import fill criteria <br />presented in the Preload Memo. <br />As presented in the Preload Memo, all analytical results met the screening levels, which indicates that <br />this imported material meets the criteria and is suitable for use at the Site. As is presented in the <br />Preload Memo, no surface grading or excavation was conducted during import or placement of this <br />material, and this material was only placed at elevations above the current and future expected <br />groundwater table (i.e., in unsaturated conditions). <br />2.2.2.2 Getchell Pit #15415 <br />As presented in the July 26, 2021 letter prepared by Krazan & Associates, Inc. (Krazan), 15 <br />characterization samples (representative of 11,000 CY of material) were collected from crushed <br />surfacing base course (CSBC) sourced from the Miles Sand and Gravel—Getchell Pit #15415. Results for <br />all analytes met the criteria by a direct comparison to the Work Plan criteria and provided satisfactory <br />import fill data for material represented by these samples. <br />2.2.2.3 Cadman Pit D345 (a) <br />As presented in the August 18, 2021 letter prepared by Krazan, 22 characterization samples <br />(representative of 18,000 CY of material) were collected from CSBC sourced from the Cadman Sand and <br />Gravel pit #D345. Results for copper and nickel did not meet import fill criteria by a direct comparison to <br />the Work Plan criteria; results for other analytes provided satisfactory import fill data. As suggested by <br />Ecology, a 95 percent Upper Confidence Limit (95UCL) was calculated for both the copper and nickel <br />data sets using EPA ProUCL 5.1 software; the 95UCL for nickel was 36.69 milligrams per kilogram <br />(mg/kg) and the 95UCL for copper was 29.74 mg/kg. These calculated values are less than the applicable <br />import fill criteria and indicate that these results provide satisfactory import fill data for material <br />represented by these samples. <br />2.2.2.4 Cadman Pit D345 (b) <br />As presented in the September 13, 2021 letter prepared by Krazan, 25 additional characterization <br />samples (representative of an additional 25,000 CY of material) were collected from CSBC sourced from