6617 ASSOCIATED BLVD AMAZON Geotech Report 2022-10-25

• L• K E/NFEL DER • Bright People.Right Solution. • asphalt areas with PASER ratings of 6, pavement distress generally consisted of widely spaced • longitudinal and transverse cracks, and slight raveling. In PCC areas with PASER ratings of 8, • pavement distress generally consisted of minor surface defects with slight scaling, some open • joints, and isolated meandering cracks. • • 2.2.2 Existing Pavement Thicknesses • • The existing pavement thickness was measured in the borings. Asphalt pavement was either • observed to overlie aggregate base material or what appeared to be Cement Treated Base • (CTB). Approximate asphalt concrete and aggregate base course thicknesses (measured to the • nearest '/2 inch) are summarized in Table 1. • • Table 1 Existing Pavement Section Thicknesses • • Approximate Approximate • Location Asphalt Concrete Aggregate Base • Thickness (inches) Thickness (inches) KLF-1 3 19* • KLF-2 4 15* • • KLF-3 3 13* • KLF-4 3 9 • KLF-5 4 8 • KLF-6 4 5 • KLF-7 3 15* • *Base material observations indicate CTB material used in lieu of Aggregate Base. • • 2.3 SUBSURFACE CONDITIONS • • The near-surface soils encountered in the borings are predominantly silty sand fill soils with • variable gravel content and are similar in composition to the underlying native till soils. Existing • fill ranged in thickness from approximately 5' to 7' feet below the existing ground surface • (bgs) in the parking and drive through area on the west of the warehouse, and from 5 to 9 feet • bgs in the truck parking and loading area east of the warehouse. Based on available historical • satellite imagery, significant excavation and grading has taken place at the site in the past. • Greater fill depths than those observed at the boring locations should be anticipated at the site. • • • 20203884.001A/SEA20R110164 Page 7 of 28 June 1, 2020 ©2020 Kleinfelder • •