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biosolids generated by the facility (i.e. potential business); and 2) inversely proportional to the square of the distance to the facility(or access point). The weighted average distance per load of biosolids was calculated by the total distance required for transporting 2,000 tons per day of material and the total number of loads at a capacity of 22 tons per load. Transport distance used in the 2,000 tpd case URBEMIS runs was 55 miles (one way). Baseline Case(Onroad Transport) Baseline emissions from the transport of material were calculated using a daily rate equal to 38.24 vehicle trip ends per day (19.21 truck loads of waste per day). An average of 19 trucks per day has traveled Holloway Road delivering waste streams for the existing operation, resulting in an average truckload rate of approximately 425 tons per day. Baseline emissions were determined from monthly trip counts, calculated from the total amount of material received each month using a truck capacity of 22 tons per truck load. Vehicle miles traveled per truck load (trip) were calculated using the weighted average distance for transport of material to the facility. During the baseline period, the weighted average travel distance to the mine was about 65 miles per load of waste. However, transport distances used in the URBEMIS runs for the baseline case was 55 miles(one way). This results on a more conservative(worst case)scenario for the proposed Project. This is because a smaller baseline emission rate results in a larger incremental Project contribution, or net emissions increase. Waste material transported to the facility for disposal may originate from waste generators located throughout California. However, during the baseline period the majority of the material disposed of at the facility originated from generators located in Bakersfield, Wasco, and Long Beach. Therefore the Project would have a significant and unavoidable impact on air quality. An assessment was conducted to determine what the approximate emissions would be from an absolute worst case scenario. This scenario would involve 100% of the 2,000 tpd of biosolids being transported to the H. M. Holloway Landfill from the Hyperion Wastewater Treatment Plant in the Los Angeles basin. This scenario would result in a greater transport distance than was used in the analysis above (55 miles). Under the worst case scenario, the SJVAB transport miles would be approximately 76 miles, while the South Coast Air Basin (SCAB) transport distance would be approximately 77 miles. Therefore, approximately one half of the onroad material transport emissions would occur in each air basin. URBEMIS runs were conducted to assess the onroad material transport emissions that would occur under this scenario. The analysis determined that the SJVAB component of the emissions would be approximately 37.8% higher. The increase in pollutant emissions with this scenario would not change any of the significance of the impacts evaluated for the proposed Project. The pollutant emissions that would occur in the SCAB as an indirect,impact would be approximately the same levels as the 37.8% increase which would be experienced in the SJVAB. Finding The impacts to air quality due to emissions of ozone precursors (NOx, VOC) from project operation of onroad material transport are considered significant and unavoidable. All feasible and reasonable changes or alterations have been required in, or incorporated into, the project that substantially lessen the potentially significant effect as identified in the Final EIR. Brief Explanation of the Rationale for the Finding Findings of Fact—Section 15091 March 15,2016 H. M. Holloway Landfill Modification Project Final Board of Supervisors 9