本文描述了在一次试验中降低放射性核素水平所采取的步骤和结果 1-mgd井，为佛罗里达州帕斯科县的局部地区供水。帕斯科县，位于 佛罗里达州坦帕湾大都会区以北的墨西哥湾海岸，为近200万人供水 25万居民通过全县运输和配送系统。该县的 水源来自全国29口分散的水井抽取的地下水 县和三个与当地批发商互联。作为放射性核素监测的一部分， 帕斯科县发现总α和总镭226/228的水平超过 他们的一口井，LB 2号井的规定限值。一旦被发现，该县立即 关闭油井，直到确定并实施纠正措施。二 考虑了纠正措施:重新建造现有油井，以限制或 消除含水层中的贡献区； 还有治疗。一位水文地质学家和司钻 合同规定对油井进行测井，以确定可能被污染的含水层 偏远的用于处理，一次性离子交换，常规离子交换，预成型含水 考虑了氧化锰过滤和反渗透。四种不同的设备 联系了专门处理放射性核素的供应商，并要求他们准备 并提交设备成本估算。收到并评估了八种不同的估计数。 这些数据被用作编制项目概念级设计和成本估算的基础 每个项目的资金、运营和维护成本。包括4个参考文献、表格。

This paper describes the steps and results that were taken to lower radionuclide levels in a single 1-mgd well that feeds a localized area in Pasco County, Florida. Pasco County, located on the Gulf Coast of Florida north of the Tampa Bay Metropolitan Area, provides water to nearly 250,000 residents through a county-wide conveyance and distribution system. The County's water supply comes from groundwater pumped through 29 dispersed wells throughout the County and three interconnects with a local wholesaler. As part of monitoring for radionuclides, Pasco County discovered levels of gross alpha and combined radium 226/228 that exceeded regulated limits in one of their wells, LB Well No. 2. Once discovered, the County immediately shut-down the well until corrective measures could be identified and implemented. Two corrective measures were considered: re-construction of the existing well to possibly limit or eliminate contributing zones in the aquifer; and, treatment. A hydrogeologist and driller were contracted to perform logging of the well to identify aquifer zones that could potentially be isolated. For treatment, single use ion exchange, conventional ion exchange, pre-formed hydrous manganese oxide filtration and reverse osmosis were considered. Four different equipment vendors specializing in the treatment of radionuclides were contacted and requested to prepare and submit an equipment cost estimate. Eight different estimates were received and evaluated. These were used as the basis for preparing a conceptual level design and cost estimate for capital, operations and maintenance costs for each. Includes 4 references, tables.