7301 EVERGREEN WAY EVERETT CHEVROLET 2017-03-01

4.0 SCOPE OF WORK All work will be conducted according to the procedures provided below. The scope of work may be amended based on observations during field work indicating any potential need to further advance excavation extents to remove impacted soil. If impacts are observed using field screening techniques at the specified sample depths and locations noted below, AHLLC will be contacted to coordinate additional actions as appropriate. Field screening techniques will consists of screening soil using a PID and visual or olfactory evidence of impact (e.g. staining, odors, etc.). The proposed scope of work outlined in the following sections of this Work Plan has been developed using the rationale discussed in Section 3.0. 4.1 Health and Safety EEC will prepare a comprehensive Site-specific Health and Safety Plan(HASP) to protect Site workers. The plan will be reviewed and signed by each Site worker and kept on the Site during field activities. 4.2 Utility Clearance Each proposed area of excavation will be cleared through the public utility one-call service for Washington prior to the commencement of any field activities. A private utility locating service will also be used to verify clearance of each area of excavation from subsurface utilities or other obstructions. 4.3 Remedial Excavation Impacted soil in the identified areas will be excavated and removed subsequent to the demolition of the two Site buildings. Soils removed will be screened using a PID and inspected for visual or olfactory evidence of impact (e.g. staining, odors, etc.). Soils exhibiting elevated PID readings or evidence of impact will be placed into on-Site roll-off bins pending waste characterization and subsequent off-Site disposal at a properly permitted facility (see Section 4.5). To minimize the volume of soil disposed, soils free of elevated PID readings and visual or olfactory evidence of impact will be considered "clean" and stock-piled on plastic sheeting at a common on-Site location for future use as backfill material following confirmation sampling. Additional details are presented in section 4.3.4. The soil sample locations where TPHo was identified at concentrations above the established cleanup levels are currently present beneath a concrete slab below the existing buildings. The locations of these former sampling locations were surveyed prior to demolition to assist in locating the areas requiring excavation in the future. The survey files and supporting documentation are provided in Attachment A. Based on the information provided in the RI/FS report, the following excavation areas are proposed. The excavation extents are depicted on Figures 3 and 4. 017386-174(123) 6 THIS DOCUMENT IS PRINTED ON RECYCLED PAPER Encore Environmental Consortium,LLC