1415 75TH ST SW BASE FILE 2020-06-19

Task 3—Removal and Handling of Impacted Soil Item 3.1: Impacted Soil Excavation Soil Excavation includes excavation of interior soil removal areas by conventional soil removal techniques (tracked excavator). This includes providing and installing shoring measures that may be necessary to mitigate potential sidewall failure during removal of impacted soil as defined in the Work Plan. Approximate soil volumes anticipated for removal are 485 Cubic Yards in total. Item 3.2: Loading, Transportation, and Disposal of Impacted Soil Loading, Transportation and Disposal of Impacted Soil includes all handling related to soil loading into trucks or bins; covering of loads prior to exiting the Site; and coordination of trucking with the receiving facility (CEMEX located at 6300 Glenwood Ave, Everett, WA). Task 4—Site Restoration Item 4.1: Import,Placement,and Compaction of Backfill Material AIS will install, and compact a "clean" backfill material composed of a granular, non- cohesive material with 100%passing the 2-inch sieve, approximately 50%passing the #4 sieve, and less than 10%passing the #200 sieve.Backfill material will be Virgin Crushed rock from CEMEX located at 6300 Glenwood Ave, Everett, WA Backfill shall be installed in lifts not to exceed 1 foot loose thickness, and will be compacted using non-vibratory equipment and must pass 90% compaction test requirements as specified by the Engineer. Item 4.2: Replacement of Concrete Floor Slab Replacement of Concrete Floor Slab includes all work associated with restoration, in kind, of concrete: floor slabs inside the building that were removed for excavation purposes. This includes, but is not limited to, all edge preparations; forming, import, placement, and finishing of 5-inch thick cement concrete slab to the lines and grade of the previously existing building floor slab. A drawing has been provided showing the proposed replacement section with#4 Rebar 18" OC/EW with dowelled embedment per plan. Item 4.3: Final Cleanup and Demobilization Final Cleanup includes restoration of any building features damaged or demolished as part of Site Preparation work and cleanup of interior and exterior areas impacted by the work. This item also includes collection and disposal of Contractor-generated refuse and trash,and demobilization of all labor, equipment and materials from the site. Task 5—Dust Cleanup Item 5.1: Remove Insulation Blankets in the Production Area AIS will completely remove all interior insulation blankets (fiberglass and surfacing fabric) from the Production Area interior walls with the expectation that blankets and hardware will not be reused. 1502 E.Opp Street,Wilmington,CA,90744 (73j1)-° Office(310)522-1168 Fax(310)522-0474