Table 2.

Patient exposure to hexavalent chromium according to task

Duration (y) ∗	Job type	Job characteristics (in order of performance)	Exposure probability	Exposure level
4.8	Sanding	Damaged bumpers are repaired by applying putty and then sanding	Unlikely†	No exposure
9.5	Spraying	Spraying paint on the bumper	Certainly	ND–0.118 mg/m3 (0.024 mg/m3‡)
0.8	Heat treatment	Heating bumper for drying paints	Very unlikely	No exposure

ND, not detected.

^∗Estimated job-specific work period of 15 years (1997–2012).

^†In this report, no hexavalent chromium was detected, but was likely to have been present when repairing damaged bumpers (containing Cr⁺) in the past.

^‡Approximately 20 painting job units were completed per day, of which 1% were yellow; therefore, the number of yellow paint job units completed per day was 0.2. The concentration of hexavalent chromium for each yellow paint job unit is 0.118 mg/m³ (Table 1), and the total concentration of hexavalent chromium exposure per day was therefore estimated to be 0.024 mg/m³.