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调查表明,在公路养路工作业的现场,不论是“白色路面”,还是“黑色路面”,空气中粉尘样品大部分超过容许浓度,而“黑色路面”空气中四乙基铅约有1/4样品超过最高容许浓度。
Surveys show that most of the dust samples in the air exceeded the allowable concentration of dust samples in the “road maintenance work” on the road, whether it was “white pavement” or “black pavement”, while the “black pavement” air contained about 1/4 of tetraethyl lead The sample exceeded the maximum allowable concentration.