AIA 101 Agreement 08302024 - Laserfiche WebLink

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June 13, 2023 HWA Project No. 2022-188-21 tipping floor. The tipping floor will be accessed by commercial and self -haulers via. a wide paved driveway ramp that ascends from the perimeter access road southward to the transfer station. Refuse collected on the tipping floor will be directed by solid waste personnel into a top -loading system situated above a series of hopper bays located along the eastern side of the structure. To achieve the grade separation required to accommodate loading waste haul trailers, placement of fill in excess of 16 feet high is presently envisaged. The fill placed to accommodate the haul trucks will be retained using a cast -in -place (CIP) concrete retaining wall situated inside the transfer station near the east side of the facility. West of the transfer station a 5.07 acre composting facility will be constructed, that will likely consist of a slightly sloping paved area where compost and/or topsoil is produced. South of the compost facility another paved area encompassing approximately 10,000 square feet (SF) will serve as a white goods acceptance area with adjacent tire recycling area to the east. Stormwater will be collected and conveyed to detention ponds situated southwest of the recycling center and in the southeast property corner. 1.3 SCOPE OF SERVICES AND AUTHORIZATION HWA undertook the geotechnical investigation in accordance with our scope of work and cost estimate dated December 9, 2022, and agreement dated January 6, 2023, with SCS Engineers, Inc. The main tasks of our scope include: • Conducting borings at the locations of the transfer station, scale facility, MRW building, and composting area as depicted on the conceptual layout. • Conduct a laboratory testing program to characterize site subsoils. • Prepare a geotechnical report summarizing results of the field investigation, laboratory testing results and will include recommendations for building and retaining wall foundations, lateral earth pressures, earthworks, and pavement design. • Providing one round of plan review to ensure our geotechnical recommendations are incorporated. 2.0 FIELD EXPLORATION AND LABORATORY TESTING 2.1 FIELD EXPLORATION Our subsurface investigation consisted of drilling eight borings, designated BH-1 through BH-8 and were conducted on February 28 and March 1, 2023. The borings were drilled by Holt Drilling, Inc., of Edgewood, Washington, under subcontract to HWA, using a track -mounted Diedrich D-50 drill rig equipped with hollow stem augers. The borings were drilled to depths ranging from about 16.5 to 21.5 feet below ground surface (bgs) and were located to obtain subsurface data at the approximate location of proposed structures at the time of drilling. 2022-188-21 KCTS — Final Geotechnical Report 3 HWA GEOSCIENCES INC.