Summit provided environmental consulting services as part of the Orange County Transportation Authority Placentia Avenue Grade Separation project. The tracks, which were being separated from the roadway, were used daily for BNSF Railway freight transportation and by Metrolink and Amtrak passenger rail services. This was the first of seven-grade separation projects along the BNSF/Orangethorpe Corridor being constructed in the Orange County Bridges program. The project consisted of lowering the Placentia Avenue roadway under the BNSF tracks to provide a grade-separated crossing. Construction of bypass tracks and a temporary detour road were necessary to construct the Project. The Project scope also included work at adjoining streets and commercial driveways. Consulting services included reviewing existing environmental reports for the site, soil sample collection along 2,300 feet of track, soil analysis and characterization, and stockpile sampling. Statistical analysis and perceived options for hazardous material disposal and reuse were completed by Summit. As part of the soil remediation, Summit excavated, loaded, transported, and disposed of over 130,000 tons of non-hazardous and heavy metals impacted California Hazardous soil. Summit also prepared a Lead Compliance Plan, Health and Safety Plan, Soil Sampling and Analysis Plan, and Soil Excavation Management Plan for this project.