2011-362 Planning - Terracon Consultants, Inc. for Buckhorn Efland Phase 2 Sanitary Sewer Construction Materials Testing

Browse Search

Irerralcon EXHIBIT B PROPOSED SCOPE OF SERVICES Central Efland/Northern Buckhorn Sewer Extension Orange County, NC Based on our understanding of the project information and our experience with similar projects, we anticipate providing the services listed below. Field and laboratory test procedures will follow ASTM and AWS standards. Terracon will maintain a record of observations and tests and deviations from the Contract Documents. The reports will be in writing and will be provided to the contractor and owner's agent for each day an inspection is made. Terracon will inform the contractor's on-site representative of deviations from the Contract Documents. Any deviations, which are not corrected will be included in the daily reports and added to the project deviation log. Terracon is not authorized to revoke, alter, relax, enlarge, or release any requirements of specifications, nor to approve, reject, or accept any portion of work. The testing program will generally include: 1. Structural fill— Terracon will obtain bulk samples of on-site cut and/or borrow material for soil laboratory testing. Soil laboratory testing will consist of a standard Proctor test (ASTM D 698),Atterberg Limits test, sieve analysis and a natural moisture content test. Terracon will perform density testing on the structural fill placed in the utility trenches using the sand cone density test method (ASTM D 1556), drive tube test method (ASTM D 2937) and/or the nuclear gauge density test method (ASTM D 2922). The percent compaction will be calculated by comparing the field density to the maximum dry density as determined by the standard Proctor test result. 2, Asphalt Paving— Terracon will provide a coring crew as requested to determine the thickness and density of the new asphalt pavement. Thickness testing will be performed in accordance to ASTM D 3549. Density testing will be performed in accordance with ASTM D 1188 or ASTM D 2726 (Target specific gravity of HMA provided by supplier). 3. Concrete— Terracon will provide an AGI certified engineering technician to perform slump, air content, unit weight and temperature tests during concrete placement. The technician will mold 5 concrete compression test specimens for each concrete mix placed each day. Concrete samples will be taken at the point of discharge wherever possible. One slump test will be performed for each strength test. Additional slump tests may be performed if the concrete consistency changes.