William Petersen Email and Phone Number

- Collects samples of soils and construction materials in the field to measure physical characteristics; may be required to collect and test environmental media and measure environmental characteristics.- Performs a variety of tests on construction materials including soils, sand, aggregates, concrete, asphalt and other mixes, cement-treated bases, and other materials, using sophisticated materials-testing equipment.- Operates nuclear and electronic instruments to determine relative compaction of soils; calibrates and adjusts instruments to compensate for changing conditions.- Inspects facilities where materials are used and stored to ensure compliance with Federal, State, and local regulations and ordinances.- Inspects asphalt and concrete batches; checks equipment, weights, temperatures and materials for compliance with specifications; tests and calculates aggregate gradings for field mix design.- Records and reports test results after performing mathematical calculations, making graphical solutions and graphical representations.- Communicates orally and in writing with supervisor and staff members, City and outside agency representatives, contractors, business and property owners, or the general public.- Uses a personal computer to write memos, complex operational and inspection reports, and letters; to communicate with others via e-mail (Microsoft Outlook); and to perform computer file management when storing and retrieving information related to documentation of inspections, sampling and testing activities and results.- Uses appropriate personal protective equipment (PPE), which may include wearing a respirator, and follows appropriate health and safety practices.- Maintains a valid driver license and drives a motor vehicle in the course of collecting samples, performing field tests and conducting inspections.- Uses a two-way radio, cell phone or pager to communicate