SU0007861 - Laserfiche WebLink

Home Browse Search

r.' Draft Supplemental Environmental Impact Report Page IV.E-15 Forward Inc. Landfill 2014 Expansion Project low The Post-Project or Future Potential scenario was estimated in the HRA assuming full implementation of the Project described in the HRA,namely the proposed development of additional disposal area within the currently permitted Forward Landfill boundary and creek re-location. The proposed expansion does include an increase in the rate of landfill-related activities from the current actual rate to the full permitted waste acceptance rate of 8,668 tons ►� per day. The project would result in an increase of air toxics emissions from onsite emission sources associated with the operation of the project such as flare and/or LFG engines, DPM emissions from increased truck trips, and fugitive LFG emissions. The incremental carcinogenic risk(increase in cancer risk from the Current Actual to the Project scenario Landfill Gas Flare)is estimated to be 4 cancer occurrences per million persons at the nearest occupied receptor. This value is below the threshold of 10 cancers per million and thus, *- the impact is less than significant. This analysis is based on conservative (overestimated)assumptions, and can be considered a L, worst-case analysis. The maximum incremental cancer risk is relatively small compared with the overall lifetime cancer incidence of 200,000 to 250,000 per million in the United States. The OEHHA has established a significance threshold for non-cancer health risk based on concentrations that would result in a Hazard Index (HI) greater than 1.0. Based on the modeling, the non-cancer health risks would be well below the Hazard Index of 1.0 at all receptors. The maximum non-cancer acute hazard risk would be an HI of 0.0117. The maximum non-cancer chronic hazard risk would be an HI of 0.00016. These values are below the threshold of 1.0 and thus, the impact is less than significant. y, Implementation of the measures identified in Mitigation Measure D.2a would reduce emissions and further reduce both cancer and non-cancer health risks near the project area. 4 ti s