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Richmond, CA. https://www.edph.ca.gov/Programs/CCDPHP/ DEODC/EHLB/IAQ/Pages/VOC.aspx. For the outdoor air ventilation rate I used the 2019 Title 24 code required mechanical ventilation rate (ASHRAE 62.2) of 106 cfm (180 m3/h) calculated for this model residence. For the composite wood formaldehyde emission rates I used the CARB ATCM Phase 2 rates The calculated maximum number of square feet of composite wood product that can be in a residence, without exceeding the CEQA cancer risk of 10 per million for occupants with continuous occupancy are as follows for the different types of regulated composite wood products. Medium Density Fiberboard (MDF) — 15 ft2 (0.7% of the floor area), or Particle Board —30 ft2 (1.3% of the floor area), or Hardwood Plywood — 54 ft2 (2.4% of the floor area), or Thin MDF — 46 ft2 (2.0 % of the floor area). For offices and hotels the calculated maximum amount of composite wood product (% of floor area) that can be used without exceeding the CEQA cancer risk of 10 per million for occupants, assuming 8 hours/day occupancy, and the California Mechanical Code minimum outdoor air ventilation rates are as follows for the different types of regulated composite wood products. Medium Density Fiberboard (MDF) — 3.6 % (offices) and 4.6% (hotel rooms), or Particle Board — 7.2 % (offices) and 9.4% (hotel rooms), or Hardwood Plywood — 13 % (offices) and 17% (hotel rooms), or Thin MDF — 11 % (offices) and 14 % (hotel rooms) Clearly the CARB ATCM does not regulate the formaldehyde emissions from composite wood products such that the potentially large areas of these products, such as for flooring, baseboards, interior doors, window and door trims, and kitchen and bathroom cabinetry, could be used without causing indoor formaldehyde concentrations that result in CEQA 7 � 6 is