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DocuSign Envelope ID:35B29A4C-EA5E-4F1C-9C55-5AB9721304BD <br /> USUMMIT 320 Executive Court, Hillsborough, NC 27278 <br /> DESIGN AND ENGINEERING SERVICES Phone // 919.732.3883 Web // www.summitde.net <br /> April 29, 2020 <br /> MEMORANDUM TO: Angel Barnes <br /> Capital Projects Manager <br /> Orange County—Asset Management Services <br /> FROM: Don Dewey, PE. <br /> Senior Geotechnical Engineer <br /> Summit Design and Engineering Services, PLLC <br /> SUBJECT: Orange County Motor Pool Gravel Lot—Upft Recommendations <br /> Evaluation and Findings <br /> On Friday,April 17th,the gravel parking lot was evaluated by proofrolling with loaded dump truck. <br /> The subgrade appeared stable with no signs of adverse movement, pumping or other instability. <br /> North of the gravel lot, between the oak trees and the fence was visually examined and evaluated <br /> using a probe rod. Several soft areas were identified in this area due to runoff collecting in low <br /> spots and a thick cover of leaves and sticks matted against the fence and within the low areas. <br /> The western side of the gravel lot was blocked by parked vehicles and could not be proofrolled. A <br /> visual examination found this area heavily vegetated with undergrowth and small clusters of small <br /> to medium trees less than 8-inches in diameter. Digging into the subgrade revealed a bed of gravel <br /> covering most of the area. <br /> The ditch on the eastern side of the gravel lot was inspected. Overall, there was a steady fall from <br /> driveway on south end of the site to the fence on the northern side of the site. The fall was <br /> interrupted by an area backfilled to serve as a walkway and backed up dead vegetation. <br /> Unfit Recommendations <br /> The area to be upfit is bounded to the south by the north side of the metal storage canopy, to the <br /> west and north by the chain link fence and to the east by the drainage ditch. <br /> The following recommendations for upfit of the gravel parking lot are as follows: <br /> • Clearing and Grubbing <br /> o Spray to kill all weeds and grasses <br /> o Clear and grub trees and shrubs leaving the two largest oaks on west side of the site <br />