The development of brownfield sites in the UK requires site investigation for contamination as part of the regulatory planning process. This site investigation includes the collection of soil samples that are analysed for asbestos contamination. This research project analyses this untapped resource of brownfield asbestos data, using site investigation data submitted to a local Borough Council, in Surrey, UK. Over 100 site investigation reports were collected. This paper presents the trends in asbestos testing from 2001-2019 and data on the location, concentration, form and type of asbestos found in this Borough. The rate of asbestos detection has increased significantly, reflecting improvements in asbestos measuring techniques, to a rate of 22% for all samples tested between 2016 and 2019. The concentrations of asbestos found were very low, with 74% of samples having concentrations below the limit of detection of the laboratory and were predominantly of fibrous form. A significant proportion of samples contained more carcinogenic amphibole type. Most of the asbestos was found in the top 1m of Made Ground soil. Site history was found to be important with gas works having the highest asbestos detection rate, though a detection rate of 10% was found in soil samples on former residential sites. This information is important to inform and update risk assessment for site workers and site remediation in relation to asbestos. Hence based upon these results, a qualitative risk chart for asbestos is presented to provide guidance and in-sight into asbestos on brownfield sites for local authorities and developers.

在英国，棕场的开发需要进行污染现场调查，这是监管规划过程的一部分。这项现场调查包括收集土壤样本，对这些样本进行石棉污染分析。该研究项目使用提交给英国萨里当地自治市镇理事会的现场调查数据，分析了这一未开发的棕地石棉数据资源。收集了100多个现场调查报告。本文介绍了2001-2019年石棉测试的趋势以及在该自治市镇中发现的石棉的位置，浓度，形式和类型的数据。石棉检出率显着提高，这反映了石棉测量技术的进步，2016年至2019年之间对所有测试样品的石棉检出率达到22％。发现的石棉浓度非常低，其中74％的样品浓度低于实验室检测极限，且主要为纤维状。很大一部分样品含有更多的致癌闪石类型。大多数石棉被发现在人造地面的前1m。现场历史被发现对石棉检出率最高的煤气厂很重要，尽管在以前住宅区的土壤样品中检出率为10％。此信息对于告知和更新现场工作人员的风险评估以及与石棉有关的现场修复非常重要。因此，基于这些结果，提出了石棉的定性风险图，以便为地方当局和开发商提供有关棕地现场石棉的指导和见解。