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3.10.2 "Calculation of Estimated Building Concentrations" of the California Department of Health "Standard Method Liar the Testing and Evaluation of Volatile Organic Chemical Emissions for Indoor Sources Using Environmental Chambers", (CI)PH, 2017). 6.) Calculates the Indoor Exposure Cancer and Von -Cancer Health Risks. For each IAQ Zonc, calculate the cancer and non -cancer health risks from the indoor formaldehyde concentrations determined in Step 5 and as described in the OEHHA Air Toxics Hot Spots Program Risk Assessment Guidelines; Guidance Manual for Preparation. or health Risk Assessments (OEHHA, 2015). 7.) Mitigate Indoor Formaldehyde Exposures of exceeding the CEOA Cancer and./or Non - Cancer Health RiskA In each IAQ Zone, provide mitigation for any formaldehyde exposure risk as determined in Stop 6, that excccds the CEQA cancer risk of 10 per million or the CEQA non -cancer Hazard Quotient of 1.0. Provide the source andlor ventilation mitigation required in all IAQ Zones to reduce the health risks of the chemical exposures below the CEQA cancer and non -cancer health risks. Source mitigation for formaldehyde may include: 1.) reducing the amount materials andlor furnishings that emit formaldehyde 2.) substituting a difforerrt material with a lower area -specific emission rate of formaldehyde Ventilation mitigation for formaldehyde emitted from building materials and furnishings may include: I.) increasing the design minimum outdoor air ventilation Tale to the IAQ Zoiw NOTE: Mitigating the formaldehyde emissions through use of less materiallfumishings, or use of lower emilling materialsifum ishings, is the prelcrred mitigation option, as mitigation with increased outdoor au ventilation increases initial and operating costs associated with the heating/cooling systems. 9of19 22 75C-46