Gagné D
Régie régionale de la santé et des services sociaux de l'Abitibi-Témiscamingue, Rouyn-Noranda, Qc.
Can J Public Health. 1994 May-Jun;85(3):163-6.
In 1979, children two to five years of age living in Rouyn-Noranda, QC, in an urban district located within 1 km from a copper smelter had mean (geometric) blood lead levels (BLL) of 21 micrograms/dL. Afterwards, stack emissions were lowered. In 1989, mean (geom.) BLL were reduced to 11 micrograms/dL; 50% of the district children had BLL less than 10 micrograms/dL. In 1990-91, a $3 million top soil removal operation took place; residential lots having more than 500 ppm soil lead were decontaminated. In 1991, BLL were reduced to 7 micrograms/dL; 75% of the children had less than 10 micrograms/dL. Geographic analysis of the 1991 results showed that children with the highest BLL lived nearest to the smelter, where atmospheric dustfall to the ground reached 36 mg/m2/month. Follow-up pediatric blood lead campaigns are planned in 1993 and 1995, to evaluate the effects of an ongoing program for further reduction of atmospheric smelter emissions.
1979年，居住在魁北克省鲁安 - 诺兰达市一个距离铜冶炼厂不到1公里的市区内的2至5岁儿童，其平均（几何）血铅水平（BLL）为21微克/分升。此后，烟囱排放量降低。1989年，平均（几何）血铅水平降至11微克/分升；该市区50%的儿童血铅水平低于10微克/分升。1990 - 1991年，进行了一项耗资300万美元的表层土壤清除行动；对土壤铅含量超过500 ppm的住宅地块进行了去污处理。1991年，血铅水平降至7微克/分升；75%的儿童血铅水平低于10微克/分升。对1991年结果的地理分析表明，血铅水平最高的儿童居住在离冶炼厂最近的地方，那里地面大气降尘量达到36毫克/平方米/月。计划在1993年和1995年开展后续儿科血铅监测活动，以评估一项持续进行的进一步减少冶炼厂大气排放计划的效果。
