2020-792-E AMS-ECS Southeast LLP Efland geotechnical services

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DocuSign Envelope ID:254EEE07-4235-430E-AB86-8BA7FDCF270B November ECS Southeast, LLP the boreholes,we will patch the asphalt surface with a cold mix asphalt patch of an equivalent or greater thickness of asphalt. However, any minor heaving will not be repaired and the cold patches will be obvious. Since clearing of site vegetation is required to access the proposed boring locations, please note that minimum 10-foot wide cleared paths will result. We will attempt to minimize disturbance to the wooded site, and we will avoid cutting trees more than 4 inches in diameter as much as practical. Our proposed fee does not include any restoration of cleared areas or moving/chipping of felled trees along the edges of cleared paths. If there are any areas where clearing is not to be performed (such as in Resource Protection Areas (RPA), tree protection areas, or other areas), those areas must be clearly marked on plans provided to us and should be delineated in the field with flagging prior to our mobilization to the site. ECS cannot be responsible for disturbance of sensitive or restricted areas not identified in this manner. Task 2—Seasonal High Water Table (SHWT) Determination As requested in the RFP, ECS can perform a determination of the seasonal high water table (SHWT) in the proposed stormwater control measure area. An ECS soil scientist will advance a hand auger boring at the location indicated as SHWT-1 in Figure 1 to evaluate the soil properties and to determine the depth of the seasonal high water table. The soil properties and characteristics will be observed and recorded in field notes. They include texture, depth, the presence of restrictive horizons, depth to seasonal high water table, coarse fragments, etc. Infiltration testing will be also performed using a constant head permeameter. The assessment will be conducted in accordance with current soil science practices, current technology, and the North Carolina Division of Environmental Quality Stormwater Design Manual (April 2017). The results of the seasonal high water table evaluation and infiltration testing will be provided in a separate report. Task 3—Geotechnical Design Development Services Our experience has shown that increased communication between the geotechnical engineer and project design team during plan and specification development can lead to significant reductions in change orders during construction. ECS encourages that our involvement in this project continue during its plan development stage. As requested in the RFP, services ECS can provide during plan development include the following: • Review of plans and specifications with regard to geotechnical considerations • Estimating allowances for geotechnical related items in conjunction with the site civil engineer • Attendance of the pre-bid and pre-construction meetings to communicate the conclusions and recommendations described in our report • Evaluation of value engineering proposals FEE ECS will provide the proposed scope of services outlined in this proposal for the following fees: a ECS Proposal No:06:22345 Page 17 0'