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Ponderosa Homes at 6900 Valley Trails Drive Initial Study and Negative Declaration Table 1 Bay Area Air Quality Management District Air Quality Significance Thresholds Risk and Hazards 4.34 itmc,p.w.:AvAle tdant ` ',•; f.__OperabonaFRB&ated,... . Compliance with Qualified Community Risk Reduction Plan OR Increased cancer risk of>10.0 In 1 million` Risk and Hazards for new sources Increased non-cancer risk of>1.0 Hazard Index and receptors(Individual Project) (Chronic or Acute)' Ambient PM/5 increase:>0.3 pgtnr3 annual average' Zone of Influence: 1,000-foot radius from property line of source or receptor Compliance with Qualified Community Risk Reduction Plan OR Cancer>100 in 1 million(from all local sources)' Risk and Hazards for new sources Non-cancer>10.0 Hazard Index(from all local sources) and receptors(Cumulative Threshold) (Chronic)' PMas:>0.8 pgtms annual average(from all local sources)' ZQrte of Influence: 1,000-foot radius from property line of source or receptor Source: BAAQMD 2011. Emphasis added. Based on BAAQMD's Highway Screening Analysis Tools and Roadway Screening Analysis Calculator,6 residents of the project site could be exposed to suspended particulate matter (PM2.5) and cancer risks as reported in Table 2. The project would not expose residents to PM2.5 levels exceeding the 0.3 pg/m3 threshold suggested by BAAQMD, but would exceed the 10 per million increased cancer risk. 5 Bay Area Air Quality Management District, Highway Screening Analysis Tool, Alameda County 6ft elevation, posted April 28, 2011. 6 Bay Area Air Quality Management District, Roadway Screening Analysis Calculator, posted September 30, 2015. <http://www.baagmd.gov/-/media/files/planning-and- research/ceqa/screeningcalculator_4_16_15-xlsx.xlsx?la=en> Accessed February 26, 2017. 17