https://archive.epa.gov/region07/cleanup/superfund/pdf/web/pdf/superfund_herculaneum_lead_smelter_mo_sample_results1.pdf monthly 1.00 https://archive.epa.gov/region07/cleanup/superfund/pdf/web/pdf/2nd_modification_doe_run_herculaneum_mo051706.pdf monthly 0.80 https://archive.epa.gov/region07/cleanup/superfund/pdf/web/pdf/3rd_modification_doe_run_herculaneum_mo072606.pdf monthly 0.80 https://archive.epa.gov/region07/cleanup/superfund/pdf/web/pdf/doerunaoc.pdf monthly 0.80 https://archive.epa.gov/region07/cleanup/superfund/pdf/web/pdf/final_doe_run_aoc_1st_mod.pdf monthly 0.80 https://archive.epa.gov/region07/cleanup/superfund/pdf/web/pdf/final_doe_run_aoc_sow.pdf monthly 0.80 https://archive.epa.gov/region07/cleanup/superfund/pdf/web/pdf/herculaneum_lead_trend_analysis_thru_0409.pdf monthly 0.80 https://archive.epa.gov/region07/cleanup/superfund/pdf/web/pdf/ols_resp_sum.pdf monthly 0.80 https://archive.epa.gov/region07/cleanup/superfund/pdf/web/pdf/ols_rod.pdf monthly 0.80 https://archive.epa.gov/region07/cleanup/superfund/pdf/web/pdf/ricp_complete.pdf monthly 0.80