"The groundwater at the facility has arsenic, lead, and cadmium concentrations
above the maximum contaminant level (MCL). ......The most prevalent
COC in the groundwater is arsenic. Currently, the highest concentration of
arsenic in the groundwater occurs in onsite well EP-49 with a concentration of
62.5 mg/L, which is approximately 6,200 times the MCL for arsenic. The area of
contaminated groundwater is shown in Figure 5."
http://www.tceq.state.tx.us/assets/public/remediation/variousremediationsites/sher_asarco_expert_report.pdf
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