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data) Home Assessed Value Correlation between home value and probability of lead in SL and internal plumbing (the lower the home value, the higher the SL probability) Useful for environmental justice considerations Street addresses Can use street addresses to connect tier site sample results to specific addresses in our baseline file Subdivisions or neighborhoods Can use this as supplemental information to help us understand whether or specific subdivision or neighborhood has a lot of lead exceedances Lead concentrations from sample results (ppb Use this information to help us understand or ug/L) the probability of a lead service line LCR event months and year Use this longitudinal data to understand how lead concentrations have evolved over time and helps us understand the probability of a lead service line Clean & Combine Cleaning and combining the data means to modify, reorganize, and adjust the data in a way that prepares it for more in-depth analysis. Cleaning and combining data happen simultaneously and the process used is contingent on the type of data sources provided and how the data is organized. 120Water Program Consultants will review and analyze all records to determine which locations in The City of Santa Ana's service area are known to be Lead, Non -Lead, GRR or Unknown which permits identifying areas where LSL's are most likely to exist. Verify At this point in the process, a compliant Service Line Inventory has been reached. The goal of this stage is to understand the inventory findings and evaluate what the future holds. Through the Verification Workshop, 120Water will provide a detailed summary with the recommendations of how to verify lead status unknown given the various methods approved by the EPA but also the State Agency. Within this report, 120Water will provide a cost analysis for the verification efforts.