File Name : figs1.pdf

Caption : figure s1. spatial distribution of shale network (sn) and padep groundwater samples within 1 km (sn) and 1.3 km (padep) of six 2024 swpa groundwater samples located in treatment areas associated with four of the five selected brownfield sites. the five brownfield sites, all located on oil and gas well pads, were investigated for local spill impacts and are marked with letters a–e. in each panel, the diameter of the brown circle is 3 km.

File Name : figs2_013-3_scatter_time_series.pdf

Caption : figure s2. scatter plots of brine-related species concentration vs. time (year) for sample_013-3 (collected near spill a) and sn dataset samples (within 1km).

File Name : figs3_042_scatter_time_series.pdf

Caption : figure s3. scatter plots of brine-related species concentration vs. time (year) for sample_042 (collected near spill a) and sn dataset samples (within 1km).

File Name : figs4_082_scatter_time_series.pdf

Caption : figure s4. scatter plots of brine-related species concentration vs. time (year) for sample_082 (collected near spill b) and sn dataset samples (within 1km).

File Name : figs5_090_scatter_time_series.pdf

Caption : figure s5. scatter plots of brine-related species concentration vs. time (year) for sample_090 (collected near spill c) and sn dataset samples (within 1km).

File Name : figs6_083_scatter_time_series.pdf

Caption : figure s6. scatter plots of brine-related species concentration vs. time (year) for sample_083 (collected near spill e) and sn dataset samples (within 1km).