De Novo is preparing a Mitigated Negative Declaration for a proposed 500,000 square foot industrial project located at the intersection of Vincent Avenue and Arrow Highway in Irwindale. The project site is the general location of the former Irwindale Pit No. 1 (Manning Brothers Pit) Project, which proposed reclamation of the historic mining pit. Mining of the Manning Pit began in the 1930s and was completed in the 1970s. Backfilling of the site is expected to be completed in late 2018, following 10 years of fill work. Residential uses are located to the east and west of the project site and include homes in the City of Irwindale as well as unincorporated Los Angeles County. Residents in the project area are especially concerned with air quality, traffic, noise and dust. As part of this project, De Novo prepared a Air Quality and Greenhouse Gas Analysis and Health Risk Assessment to support the findings of the Initial Study. The team worked closely with SCAQMD to identify customized assumptions regarding future heavy vehicle emissions to more accurately model potential health risks and determine impacts and mitigation measures.