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Table 4 Indoor concentrations of benzene, toluene, and xylenes in a newly renovated hotel in Beijinga [11]

From: Indoor Air Pollution and Its Control in China

Pollutant Sampling site Sampling times Concentration (μg/m3) Indoor limitb (μg/m3)
Mean Range
Benzene Guest room 6 107.0 45.7–178.8 110 (1-h average)
Conference room 6 87.0 21.7–191.5
Toluene Guest room 6 400.7 159.0–639.7 200 (1-h average)
Conference room 6 174.3 47.1–330.8
Xylenes Guest room 6 1,623.4 1,185.7–2,484.9 200 (1-h average)
Conference room 6 402.4 42.1–1,037.0
  1. aSampling time: April to June 2010
  2. bStipulated by GB/T 18883-2002 “Indoor air quality standard”