Jason Brodersen, PG, is a Geophysicist and California Professional Geologist with over 32 years of professional environmental consulting experience, including 30 years with Tetra Tech.  He has been a Project and Program Manager for complex environmental investigation and cleanup projects, due diligence, guaranteed fixed price remediation, and Phase I and II environmental assessment projects.  Mr. Brodersen has managed over 150 environmental projects with a combined value of more than $50 million. Mr. Brodersen also provides technical and contract quality assurance and quality control review for projects nationwide within Tetra Tech. Over the past 16 years, Mr. Brodersen has emerged as a nationwide expert in the development, training, and implementation of Incremental Sampling Methodology (ISM) at hundreds of projects throughout the US. Mr. Brodersen was heavily involved in development of the State of Hawaii ISM technical guidance and oversaw some of the first ISM investigations in that state. He has provided trainings and workshops in California to EPA, CalEPA, DTSC, RWQCB, California Department of Health Services, and other regulators and stakeholders as the method gains acceptance with regulators.