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DAVID DUFFY <br /> CMT TECHNICIAN II Irerracon <br /> PROFESSIONAL EXPERIENCE CERTIFICATIONS <br /> Mr. Duffy has over four years of experience in the construction materials NC Introduction to Asphalt <br /> Su pe perpave <br /> testing, with specialized laboratory and field testing experience. He NCDOT Portland Paving Concrete <br /> performs general construction inspection and field and laboratory FACE F-Number Measurement <br /> construction materials testing, including monitoring of structural backfill and NICET—Soils—Level l <br /> fill placement. Mr. Duffy also performs on-site soil compaction tests using NICET—Concrete—Level I <br /> sand-cone, drive-tube and nuclear gauge test methods, and field sampling ACI Concrete Laboratory <br /> and testing of fresh concrete. Technician, Grade 1 <br /> Mr. Duffy is proficient in soils, concrete, and asphalt laboratory testing. His <br /> soils laboratory experience includes triaxial testing, performing standard <br /> and modified proctors, and grain size analysis of soils. WORK HISTORY <br /> PROJECT EXPERIENCE Terracon, Raleigh,NC, <br /> Engineering Technician, 2005- <br /> Walnut Creek Elementary School, Raleigh, NC — Mr. Duffy served as a Present <br /> Special Inspector and engineering technician responsible for soils, <br /> concrete, and masonry inspections and testing for the new 102,497 sq.ft. S&M Engineering Technician,2004- <br /> elementary school project. 2005 <br /> Riverbend Elementary School, Raleigh, NC -- Mr. Duffy served as a <br /> Special Inspector and engineering technician responsible for soils, <br /> concrete, and masonry inspections and testing for the new 104,000 sq.ft. <br /> elementary school project. <br /> Poe Elementary School, Raleigh, NC -- Mr. Duffy served as the Special <br /> Inspector and lead engineering technician responsible for soils, concrete, <br /> and masonry inspections and testing for the 3,800 sq.ft. elementary school <br /> addition and renovation project. <br /> Town of Chapel Hill Operations Center, Chapel Hill, NC — This project <br /> consists of the construction of 15 separate buildings, roadways and parking <br /> lots. Testing included soil density for buildings, roadways and parking lots; <br /> soil bearing testing for foundations; concrete for foundations and slabs; and <br /> concrete floor flatness and levelness testing. <br /> North Regional Center, Wake Forest, NC: Mr. Duffy performed special <br /> inspections and construction materials testing during the construction of <br /> the new government center in Wake Forest. The project consisted of a <br /> single-story steel framed building with brick veneer walls. <br /> Costco Wholesale, Columbia, MD: Mr. Duffy served as field technician <br /> for the special inspections and testing program for the construction of a <br /> new 140,000 square-foot Costco retail warehouse in Columbia, Maryland. <br /> Hatteras Secondary School, NC — The project is an approximately <br /> 60,000 square foot addition to the existing school. Testing included soil <br /> density for buildings, roadways and parking lots; soil bearing testing for <br /> foundations; concrete for foundations and slabs; and concrete floor flatness <br /> and levelness testing. <br /> Case Farms, Calypso, NC — The project is a new feed mill and included <br /> slip-formed concrete silo and mill structures. Testing included soil density <br /> for structures and roadways; and concrete for slip-formed silos. <br /> 4 <br />