LeadSpread
A tool for evaluating exposure and the potential for adverse health effects resulting from exposure to lead in the environment. LeadSpread was created to run on Microsoft Excel® LeadSpread 7 is the latest version of the DTSC Lead Risk Assessment Spreadsheet. LeadSpread is a tool that can be used to estimate blood lead concentrations resulting from exposure to lead via dietary intake, drinking water, soil and dust ingestion, inhalation, and dermal contact. Each of these pathways is represented by an equation relating incremental blood lead increase to a concentration in an environmental medium, using contact rates and empirically determined ratios. The contributions via the five pathways are added to arrive at an estimate of median blood lead concentration resulting from the multi-pathway exposure. Ninetieth , ninety-fifth, ninety-eighth, and ninety-ninth percentile concentrations are estimated from the median by assuming a log-normal distribution with a geometric standard deviation (GSD) of 1.6. Download LeadSpread 7 by clicking on the link below. The LeadSpread 7 Microsoft Excel® spreadsheet (bloodpb7.xls) is contained in the executable zipped file "bld_pb7.exe." After downloading, run bld_pb7.exe in Windows Explorer to expand the files. Documentation on LeadSpread is contained as notes within the spreadsheet. Improvements in LeadSpread 7 (181KB) NOTE: If you have comments on LeadSpread 7, please include them in an e-mail message to John Christopher at jchristo@dtsc.ca.gov |