EDEIN NORTH CAROLINA COAL ASH SPILL SURFACE WATER RESULTS NOTE: The data below represents surface water samples that were collected on Feb 12, 2014 by EPA START (Team 1) sampling teams. Water sample measurements are in milligrams per liter (mg/L) and/or micrograms per liter (|a,g/L) for these samples. The data is being compared to EPA ecological risk screening levels (ERSLs) to protect aquatic life in the surface water of the Dan River. Specific qualifiers and footnotes are listed below the summary table. These samples were collected at various locations along the river (refer to map for generalized locations). The detected concentrations in surface water are all below the EPA ERSLs with the exception of lead. EPA typically screens the surface water concentrations using total metals samples, because this is a conservative practice for screening. Because lead was not detected in any of the samples of the dissolved fraction of surface water (i.e., samples that were filtered to remove particulates), there is no threat of toxicity of lead to aquatic organisms. [When chemical concentrations exceed the screening values it doesn't mean there will be adverse health or ecological effects, but recommends further investigation may be needed. Analyte Ecological Screening Standard for Surface Water Samples1 Danville WTP Leaksville Boat Access Leaksville Boat Access Sample Information Sample ID EDEN-DWTP-RAW- 20140212 EDEN-LBA- BG-20140212 EDEN-LBA- BG-20140212-DUP Date - 2/12/2014 2/12/2014 2/12/2014 Time - 0902 1005 1015 Status - Validation Complete Validation Complete Validation Complete Type Surface Water Surface Water Surface Water Water Quality Monitoring Temperature - - - 2.95 °C - - Dissolved Oxygen <6 mg/L - - 7 mg/L - - Specific Conductance - - - 0.094 mS/cm - - pH 6.5-9.0 std - - 7.08 std - - Turbidity 50 NTU - - 7.1 NTU - - Dissolved metals SW6010C/6020A/74 [70 A Aluminum 87 jig/L 8.66J \ig!L 9.71J \ig!L 9.81J \ig!L Antimony 5.6 jig/L 5.00U jig/L 5.00U jig/L 5.00U jig/L Arsenic 10 jig/L 4.50U \ig!L 4.50U \ig!L 4.50U \ig!L Barium 220 jig/L 18.6 jig/L 17.6 jig/L 17.7 jig/L Beryllium 0.66 jig/L 1.00U \ig!L 1.00U \ig!L 1.00U \ig!L Boron 0.36 mg/L 0.131J+ mg/L 0.187J+ mg/L 0.187J+ mg/L Cadmium 0.1 jig/L 0.700U jig/L 0.700U jig/L 0.700U \ig!L Calcium - - 6,990 jig/L 6,990 jig/L 7,250 jig/L Chromium 25 jig/L 2.50U jig/L 2.50U jig/L 2.50U \ig!L Cobalt 3 jig/L 5.00U jig/L 5.00U jig/L 5.00U jig/L Copper 3 jig/L 2.00U \ig!L 2.00U \ig!L 2.00U jig/L Iron 1,000 jig/L 67.3J jig/L 129 jig/L 131 jig/L Lead 0.59 jig/L 1.00U \ig!L 1.00U \ig!L 1.00U \ig!L Magnesium - - 2,610 jig/L 2,420 jig/L 2,530 jig/L Manganese 200 jig/L 35.2 jig/L 17.6 \ig!L 18.6 jig/L Mercury 0.000012 mg/L 0.00020U mg/L 0.00020U mg/L 0.00020U mg/L Molybdenum 800 jig/L 5.00U jig/L 5.00U \ig!L 5.00U jig/L Nickel 17 jig/L 0.180J jig/L 0.183J jig/L 0.155J jig/L Potassium 53,000 jig/L 1,450 jig/L 1,200 jig/L 1,250 jig/L Selenium 5 jig/L 5.00U jig/L 5.00U jig/L 5.00U jig/L Silica - - 7250 mg/L 7200 mg/L 7230 mg/L Silver 0.06 jig/L 1.00U jig/L 1.00U jig/L 1.00U jig/L Sodium 680,000 jig/L 4,930 jig/L 3,720 jig/L 3,890 \ig!L Thallium 0.24 jig/L 0.200U jig/L 0.200U jig/L 0.200U jig/L Vanadium 27 jig/L 5.00U jig/L 5.00U jig/L 5.00U jig/L Zinc 39 f-ig/L 10.0U f-ig/L 10.0U f-ig/L 10.0U f-ig/L Total Dissolved Solids EPA 160.1 Total Dissolved Solids - - 73 mg/L 55 mg/L 58 mg/L Total Suspended Solids EPA 160.2 Total Suspended Solids - - 15.5 mg/L 8.0 mg/L 9.0 mg/L &EPA United States Environmental Protection Agency lof 3 Eden North Carolina Coal Ash Spill ------- EDEIN NORTH CAROLINA COAL ASH SPILL SURFACE WATER RESULTS Analyte Ecological Screening Standard for Surface Water Samples1 Danville WTP Leaksville Boat Access Leaksville Boat Access Sample Information Sample ID EDEN-DWTP-RAW- 20140212 EDEN-LBA- BG-20140212 EDEN-LBA- BG-20140212-DUP Total Metals SW6010C/6020A/74 [70 A Aluminum 2,000 pg/L 399 pg/L 235 pg/L 261 pg/L Antimony 5.6 pg/L 5.00U pg/L 5.00U pg/L 5.00U pg/L Arsenic 10 pg/L 0.548J pg/L 4.50U pg/L 4.50U pg/L Barium 220 pg/L 23.2 pg/L 18.6 pg/L 19.2 pg/L Beryllium 0.66 pg/L 1.00U pg/L 1.00U pg/L 1.00U pg/L Boron 0.36 mg/L 0.136J+ mg/L 0.199J+ mg/L 0.198J+ mg/L Cadmium 2 pg/L 0.700U pg/L 0.700U pg/L 0.700U pg/L Calcium - - 6,490 pg/L 6,820 pg/L 6,900 pg/L Chromium 29 pg/L 0.632J pg/L 2.50U pg/L 2.50U pg/L Cobalt 24 pg/L 5.00U pg/L 5.00U pg/L 5.00U pg/L Copper 3 pg/L 0.960J pg/L 0.467J pg/L 0.437J pg/L Iron 2,300 pg/L 518 pg/L 405 pg/L 448 pg/L Lead 0.6 pg/L 0.394J pg/L 0.179J pg/L 0.908J pg/L Magnesium - - 2,420 pg/L 2,340 pg/L 2,390 pg/L Manganese 200 pg/L 107 pg/L 21.0 pg/L 23.5 pg/L Mercury 0.000012 mg/L 0.00020U mg/L 0.00020U mg/L 0.00020U mg/L Molybdenum - - 5.00U pg/L 5.00U pg/L 5.00U pg/L Nickel 17 pg/L 0.583J pg/L 0.285J pg/L 0.301J pg/L Potassium 53,000 pg/L 1350 pg/L 1180 pg/L 1190 pg/L Selenium 5 pg/L 5.00U pg/L 5.00U pg/L 5.00U pg/L Silica - - 7,430 mg/L 7,160 mg/L 7,410 mg/L Silver 0.06 pg/L 1.00U pg/L 1.00U pg/L 1.00U pg/L Sodium 680,000 pg/L 4,580 pg/L 3,580 pg/L 3,650 pg/L Thallium 0.24 pg/L 0.200U pg/L 0.200U pg/L 0.200U pg/L Vanadium 27 pg/L 1.46J pg/L 5.00U pg/L 5.00U pg/L Zinc 39 pg/L 10.0U pg/L 10.0U pg/L 10.0U pg/L Anions SW9056A Bromide - - 1.0U mg/L 1.0U mg/L 1.0U mg/L Chloride 230 mg/L 8.9 mg/L 9.8 mg/L 10 mg/L Sulfate - - 5.7 mg/L 5.1 mg/L 5.3 mg/L £% United States Environmental Protection IhI m %. Agency 2 of 3 Eden North Carolina Coal Ash Spill ------- EDEIN NORTH CAROLINA COAL ASH SPILL SURFACE WATER RESULTS Analyte Ecological Screening Standard for Surface Water Samples1 Danville WTP Leaksville Boat Access Leaksville Boat Access Sample Information Sample ID EDEN-DWTP-RAW- 20140212 EDEN-LBA- BG-20140212 EDEN-LBA- BG-20140212-DUP EPA 310.2/SM2340B/SW9040 Wet Chemistry C/SW9060A Alkalinity, Total (As CaC03) - - 28.6 mg/L 24.0 mg/L 22.3 mg/L Hardness, Calcium/Magnesium (As CaC03) - - 26.2 mg/L 26.7 mg/L 27.1 mg/L Organic Carbon, Dissolved - - 5.64 mg/L 4.40 mg/L 3.27 mg/L pH 6.5-9.0 std 7.19J std 7.08J std 7.17J std Notes Value obtained from the GL Tier 2 Values; National Recommended Water Quality Criteria; Suter and Tsao (1996); Reference condition for EcoRegion XI (25 percentile); NCDENR State Standards for surface water °C degrees Celsius EPA U.S. Environmental Protection Agency J Value is estimated J+ Value is estimated with a possible high bias (ig/L micrograms per liter mg/L milligrams per liter mS/cm milliSiemens per centimeter NTU Nephelometric turbidity units std standard U Analyte was not detected at the listed reporting limit. £% United States Environmental Protection IhI m %. Agency 3 of 3 Eden North Carolina Coal Ash Spill ------- Danville WTP Leaksville Boat Access Jnion Hall. Penhook (Gretna Rockingham Countyi Chatham (Vila) /PSC - IHaght M.iiin ill) 9pBm '377m Ridgeway Sandy Level Stones County Rock" I v>' H.i /;.P f.*r Sunimi Guilford Courthouse Nationals?'' Military PaWi Cinllori ( ounlv llillst)uii;.L"P1 h ~ "* 1 ~~ -1 - r.i".f .— V- I • I r- ¦ - ""' Greensboro Surface Water Sample Locations February 12, 2014 fQll United States Environmental Protection M \ Agency 0 4.5 Miles Map Source: ArcGIS Online World Map Topo, 2014 Legend i Approximate • r Spill Location Surface Water Sample Location ¦ Dan River Fi le: C AG I S_Worksp ac e\E de n_C o al_As h\P roj e cts\mx d\R e po rti n g\021214\S u rfa ce WaterS ampleLocations_021214.mxd ------- |