2016-130-E AMS - ECS Carolinas, LLP for geotechnical services, Phase I ESA for proposed library site

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DocuSign Envelope ID:800D8824-FA55-4AFE-9F41-84305E3BCA56 January 7,2016 1 ECS CAROLINAS, LLP existing pavement and slab areas to allow access for soil sampling. If fill material is encountered, the boring(s) should be extended through the fill into firm natural soils; therefore, additional cost (not included in this proposal) should be anticipated. ECS has assumed the site can be accessed with a truck- mounted drill rig. The boreholes will be checked for groundwater upon completion of drilling, and then backfilled by shoveling the soil cuttings into the holes, some settling may occur over time. Depending on weather, soil, and site conditions, ground disturbance (ruts, tire tracks, etc.) must be anticipated during this exploration program; this is a normal result of driving a large drill rig over a site. Neither ECS nor ECS' subcontractors are responsible for restoration of the ground surface to its original condition. If ground restoration is required, it will be invoiced to Orange County Asset Management & Purchasing at an additional rate of $160/hour. Based on the existing site conditions, modifications to our proposed boring locations should be anticipated in the field. Upon completion of the field exploration, the soil samples will be delivered to ECS' laboratory and visually classified in general accordance with the Unified Soil Classification System and selected samples will be tested for moisture content and index testing in accordance with ASTM Standards. Engineering Report The conditions encountered by the borings and the results of the laboratory testing will be evaluated by a geotechnical engineer and recommendations for design and construction of the project will be developed. The engineering report will include the following items, if appropriate for this site: • Project description; • Site conditions, including geologic, and special site features; • Field exploration and the laboratory testing procedures; • Subsurface conditions; • Foundation recommendations- • Allowable bearing pressures; • Settlement estimates (total and differential); • Site development recommendations; • Suitability of soils for use as fill material; • Discussion of groundwater impact; • Techniques to control shallow groundwater; • Discussion of difficult excavation; • Compaction recommendations; • Special conditions encountered; • Site Seismic classification; • Site vicinity map; • Boring location plan; • Soil test boring logs; and • Summary of laboratory test results. ECS will transmit reports by e-mail (and up to three hard copies via U.S. Mail, if requested). Please list those to whom the reports should be sent and provide their e-mail addresses or mailing addresses, as appropriate, on the Proposal Acceptance Form. a ECS Proposal Nos. 06:19462 and 06:19463 Page 13 O'"