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Sources UsingEnviraruoental Chambers, Vcrsion 1.1, 2017, CaliformaDepadmant of Public Health, <br />Richmond, CA. https://wv .odph.ca.gcv/Pmgrams/CCDPEP! <br />DEODC/E HLBII AQ/Page s/ V OC. asp r. <br />For the outdoor air ventilation rate I used The 2019 Title 24 code required mechanical <br />ventilation rate (ASHRAE 62.2) of 106 dw (180 m3/h) calculated for this model residence. <br />For the composite wood formaldehyde emission rates I used the CARB ATCM Phase 2 rates. <br />The calculated maximum number of square feet of composite wood product that can be in <br />a residence, without excecding the CEQA cancer risk of 10 per million for occupants with <br />continuous occupancy are as follows for the different types of regulated composite wood <br />products. <br />Medium Density Fiberboard (MDF) - 15 It' (0.7% of the floor area), or <br />Particle Board - 30 ft2 (1.3% of the floor area), or <br />Hardwood Plywood - 119 ftc (5.3% ofthe floor area), or <br />"Ilrin MDF 46 ft2 (2.0 % of the floor area). <br />For offices and hotels the calculated maximum amount of composite wood product (% of <br />floor area) that canbe used without exceeding the CEQA cancer risk of 10 per million for <br />occupants, assuming 8hours/day occupancy, andthe California Mechanical Code minimum <br />outdoor air ventilation rates are as follows for the different types of regulated composite <br />wood products. <br />Medium Density Fiberboard (MDF) - 3.6 %(offices) and 4.6% (hotel rooms), or <br />Particle Board - 7.2 % (akiloes) and 9 40% (hotel rooms), or <br />Hardwood Plywood - 29 % (offices) and 37% (hotel rooms), or <br />Thin MDF - II No (of ices) and 14 %(hotel rooms) <br />Clearly the GARB ATOM does not regulate the formaldehyde emissions from composite <br />wood products such dial the potentially large areas of these products, such as for flooring, <br />hacehonrds, interior doors, window and door trims, and kitchen and hathroom cahinetry, <br />18 of 19 <br />26 <br />75C-55 <br />