ESBGU <br />Geotextile. Do not allow the completed subgrade to dry out excessively <br />or become saturated prior to placing the geotextile and Base Aggregate. <br />20.Place the Base Aggregate over the Separation Geotextile and compact as <br /> <br />recommended in Item 3. <br />21.For the Bus Loop, provide either a minimum of 11 inches of PCC over 12 <br />inches of compacted Base Aggregate or a minimum of 8 inches of AC over <br />26inches of compacted Base Aggregate. <br />22.For the Passenger Vehicle Parking Lot, provide a minimum 3 inches of AC <br /> <br />over 12 inches of compacted Base Aggregate in parking areas. <br />23.Increase the pavement section to 4inches of AC over 12inches of <br /> <br />compacted Base Aggregate inthe Drop-off Area and driveway. <br />DESIGN REVIEW/CONSTRUCTION OBSERVATION/TESTING <br />Foundation Engineering should be provided the opportunity to review all drawings <br />and specifications that pertain to site preparation, and construction of building <br />foundations, signal pole foundations, and pavements. Site preparation will require <br />field confirmation of the assumed foundation and pavement subgrade conditions. <br />Mitigation of any unsuitable soil, high plastic clay, or subgrade pumping will require <br />engineering review and judgment. That judgement should be provided by a <br />Foundation Engineering representative. Frequent field density tests should be <br />performed on all engineered fill, subgrade, and base rock. Foundation Engineering <br />should be retained to provide the necessary construction observations and <br />construction-phase geotechnical consultation. <br />VARIATION OF SUBSURFACE CONDITIONS, USE OF THIS REPORT, AND WARRANTY <br />The analysis, conclusions, and recommendations contained herein assume the soil <br />profiles encountered in the test pits andboring are representative of the site <br />conditions. The above recommendations assume that we will have the opportunity <br />to review final drawings and be present during construction to confirm the assumed <br />foundation conditions. No changes in the enclosed recommendations should be <br />made without our approval. We will assume no responsibility or liability for any <br />engineering judgment, inspection, or testing performed by others. <br />This report was prepared for the exclusive use of Rowell Brokaw and their design <br />consultants for the LTD Santa Clara Community Transit Center project in Eugene, <br />Oregon. Information contained herein should not be used for other sites or for <br />unanticipated construction without our written consent. This report is intended for <br />planning and design purposes. Contractors using this information to estimate <br />construction quantities or costs do so at their own risk. Our services do not include <br />any survey or assessment of potential surface contamination or contamination of <br />the soil or ground water by hazardous or toxic materials. We assume that those <br />services, if needed, have been completed by others. <br />Santa Clara Transit Center January 15, 2019 <br />Geotechnical Investigation 11 Project 2181060 <br />Eugene, Oregon Rowell Brokaw <br />