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Travis M, Coburn Project Manager City of Yorba Linda, New Library and Arts A Community Center, Yorba Linda, California: Mr. Coburn was the Project Manager for preparing a methane survey work plan and implementation of a methane survey. The site Is located within the boundaries of the Yorba Linda Oil Field; therefore, a methane survey was conducted prior to development in accordance with the City's Procedure No. 6, Methane Gas Investigation and Mitigation for New or Existing Structures to be Expanded. Four nested soil vapor wells were installed within the proposed 65,000 square foot footprint in accordance with the Orange County Fire Authority Combustible Soil Gas Hazard Mitigation Guideline. Two rounds of field measurements were conducted to record soil vapor pressure, methane, hydrogen sulfide, and volatile organic compounds. Based on the methane survey detections and a review of the California Conservation Department Division of 011, Gas and Geothermal Resources Well Finder database, methane levels at the site did not require methane mitigation or pose a safety risk. City of Corona, Corona Crossroads Redevelopment Project, Corona, California: Engineer providing environmental consulting to the City of Corona during redevelopment of a former landfill site with impacts to soil (lead) and soil vapor (volatile organic compounds [VOCsj). Mr, Coburn reviewed the developer's soil management plan and provided comments and recommendations. The recommendations included environmental and regulatory compliance guidance and soil profiling and waste management strategies. Due to space and schedule constraints, Mr. Coburn recommended in-situ soil sampling to identify whether the soil planned for excavation on one side of the site could be reused as fill material on the other side. Mr. Coburn reviewed the Excavation Management and Sampling Reports and a Summary of Environmental Review letter prepared by the developer's consultants and provided comments. City of Los Angeles Bureau of Engineering, Multiple On -Call Geotechnical and Environmental Engineering Services Contracts, Los Angeles, California: Mr. Coburn serves as a Task Manager for the environmental services portion of these on- call agreements with the Bureau of Engineering. Under the environmental portion of these contracts, Mr. Coburn provides task management and technical support for primarily Phase I and II ESAs, methane surveys, groundwater monitoring and sampling, remediation feasibility studies, and remedial action planning. City of Los Angeles CRAILA— DLA, Wilmington Industrial Park Block 27 Redevelopment Project, Los Angeles, California: Mr. Coburn was the Project Manager and Project Engineer responsible for site investigation and remedial action work for the redevelopment of the industrial site in Wilmington. He negotiated with the regulatory agency, Los Angeles County Fire Department (LACoFD), and prepared and oversaw implementation of an additional assessment work plan to collect soil, soil vapor, and groundwater samples. He also wrote the Removal Action Work Plan (RAW) which has been approved by the LACoFD. City of Colton, Guyaux Landfill, Phase 11 ESA, Colton, California: Project Manager and Engineer for the preparation of a Phase II ESA Work Plan at a waste disposal site (WDS) measuring A acres to characterize and delineate the lateral and vertical extent of the wastes, including additional investigation of previously identified "hot spot" areas of "soil" containing elevated lead concentrations. Based on information contained in the California Department of Resources, Recycling and Recovery (CalRecycle) Solid Waste Information System (SWIS) database, the site was a pre -regulation, closed waste disposal site that reportedly ceased operations In December 1985. A work plan was prepared and submitted to the County of San Bernardino, Department of Public Health and to CalRecycie for review and approval. The Phase 11 ESA consisted of using a track -mounted excavator to dig approximately 22 trenches to evaluate the types and extents of wastes disposed of at the WDS as well as the potential presence and thickness of cover, if present. The results of the Phase II ESA were used to assist with evaluating whether the WDS would be capped/covered so the City could construct a soccer complex and community park. Travis M. Coburn, PE, QSD, Project Manager I Ninyo & Moore I Geotechnical & Environmental Sciences Consultants