1. Title Line 2 VANCOUVER PORTLAND SEATTLE TRI-CITIES BOISE EUGENE BEND COOS BAY Title: Line 1 © PBS Engineering and Environmental Inc. All Rights Reserved. Citation, duplication, or distribution prohibited. VANCOUVER PORTLAND SEATTLE TRI-CITIES BOISE EUGENE BEND COOS BAY Consultant Application of Clean Fill Guidance

2. © PBS Engineering and Environmental Inc. All Rights Reserved. Citation, duplication, or distribution prohibited. Sampling for a clean fill determination should consider current and former use in selecting analysis (i.e. agricultural, metals, wood preservation, etc). Sampling should consider Use and Adjacent Use

3. © PBS Engineering and Environmental Inc. All Rights Reserved. Citation, duplication, or distribution prohibited. Avoid collection of asphalt material in matrix Even a small amount of asphalt in a soil sample can contribute unacceptable concentrations of PAHs, particularly benzo(a)pyrene Stained or odorous contaminated soil is excluded from clean fill consideration Sheen test Can provide an easy “No Go” decision Field Sampling Tips

4. © PBS Engineering and Environmental Inc. All Rights Reserved. Citation, duplication, or distribution prohibited. TPH data alone is no longer acceptable for determining clean fill Clean fill guidance allows statistical analysis of sample data Ensure an adequate amount of samples are collected – Typically, stockpile sampling for disposal warrants one sample per 100 tons for the first 1,000, then one per every 500 tons – Landfills and other receiving facilities are relying on owner’s best judgment for sampling Comparison and Use of Data

5. © PBS Engineering and Environmental Inc. All Rights Reserved. Citation, duplication, or distribution prohibited. Evaluation of whole volume of soil cut – If upper foot contains concentrations of elevated lead, evaluation of entire soil cut may result in blending effect and concentrations below DEQ clean fill values – Performance of stockpile sampling Use of ISM Sampling Segregation of layer of elevated concentrations (i.e., surface soil) may limit the amount of soil requiring management Other Considerations

6. © PBS Engineering and Environmental Inc. All Rights Reserved. Citation, duplication, or distribution prohibited. Questions & Comments