EDEIN NORTH CAROLINA COAL ASH SPILL
SURFACE WATER RESULTS

NOTE: The data below represents surface water samples that were collected on Feb 15, 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 above the EPA ERSLs for arsenic, aluminum, copper, iron,
lead, manganese, and zinc for total metals. EPA typically screens the surface water concentrations
using total metals samples because this is a conservative practice for screening. Because
aluminum, copper, iron, lead and zinc were not detected in any of the samples of the dissolved
fraction of surface water (i.e., samples that were filtered to remove particulates), they present no
threat of toxicity to aquatic organisms. Arsenic and manganese continue to be detected above the
EPA ERSLs in the dissolved metals analysis. 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

Duke Outfall A
(near DRSS Boat
Ramp)

Sample Information



Sample ID



EDEN-OUTFL-A-SW-

20140215

Date

-

2/15/2014

Time

-

1000

Status

-

Validation Complete

Type



Surface Water

Water Quality Monitoring



Temperature

-

4.88

°C

Dissolved Oxygen

<6

mg/L

12

mg/L

Specific Conductance

-

0.33

mS/cm

pH

6.5-9.0

std

7.01

std

Turbidity

50

NTU

220

NTU

Dissolved metals

SW6010C/6020A/74

[70 A



Aluminum

87

jig/L

18.0J+

jig/L

Antimony

5.6

jig/L

5.00U

jig/L

Arsenic

10

jig/L

15.2

jig/L

Barium

220

jig/L

61.9

jig/L

Beryllium

0.66

jig/L

1.00U

jig/L

Boron

0.36

mg/L

0.281J+

mg/L

Cadmium

0.1

jig/L

0.700U

jig/L

Calcium

-

-

45,600

jig/L

Chromium

25

jig/L

2.50U

jig/L

Cobalt

3

jig/L

1.50J

jig/L

Copper

3

jig/L

2.00U

jig/L

Iron

1,000

jig/L

100U

jig/L

Lead

0.59

jig/L

1.00U

jig/L

Magnesium

-

-

6,310

jig/L

Manganese

200

jig/L

307

jig/L

Mercury

0.000012

mg/L

0.00020U

mg/L

Molybdenum

800

jig/L

9.61

jig/L

Nickel

17

jig/L

5.00U

jig/L

Potassium

53,000

jig/L

5,510

jig/L

Selenium

5

f-ig/L

5.00U

f-ig/L

Silica

-

-

3.14

mg/L

Silver

0.06

jig/L

1.00U

jig/L

Sodium

680,000

jig/L

8,450

jig/L

Thallium

0.24

jig/L

0.200U

jig/L

Vanadium

27

jig/L

5.00U

jig/L

Zinc

39

jig/L

42.8U

jig/L

&EPA

United States
Environmental Protection
Agency

lof 3

Eden North Carolina Coal Ash Spill


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EDEIN NORTH CAROLINA COAL ASH SPILL
SURFACE WATER RESULTS



Ecological Screening

Duke Outfall A

Analyte

Standard for Surface

(near DRSS Boat



Water Samples1

Ramp)

Sample Information



Sample ID



EDEN-OUTFL-A-SW-

20140215

Total Dissolved Solids

EPA 160.1





Total Dissolved Solids

-

-

327J+

mg/L

Total Suspended Solids

EPA 160.2





Total Suspended Solids

-

-

97.5

mg/L

Total Metals

SW6010C/6020A/74

[70 A



Aluminum

2,000

pg/L

4,850

pg/L

Antimony

5.6

pg/L

5.00U

pg/L

Arsenic

10

pg/L

33.2

pg/L

Barium

220

pg/L

97.9

pg/L

Beryllium

0.66

pg/L

0.454J

pg/L

Boron

0.36

mg/L

0.297J+

mg/L

Cadmium

2

pg/L

0.315J

pg/L

Calcium

-

-

46,800

pg/L

Chromium

29

pg/L

13.2

pg/L

Cobalt

24

pg/L

4.29J

pg/L

Copper

3

pg/L

10.6

pg/L

Iron

2,300

pg/L

8,420

pg/L

Lead

0.6

pg/L

9.32

pg/L

Magnesium

-

-

7,730

pg/L

Manganese

200

pg/L

398

pg/L

Mercury

0.000012

mg/L

0.00020U

mg/L

Molybdenum

-

-

8.65

pg/L

Nickel

17

pg/L

10.3

pg/L

Potassium

53,000

pg/L

6550

pg/L

Selenium

5

pg/L

5.00U

pg/L

Silica

-

-

10.6

mg/L

Silver

0.06

pg/L

0.0212J

pg/L

Sodium

680,000

pg/L

8,790

pg/L

Thallium

0.24

pg/L

0.100J

pg/L

Vanadium

27

pg/L

11.5

pg/L

Zinc

39

pg/L

167J+

pg/L

£%	United States

Environmental Protection
IhI m %. Agency

2 of 3

Eden North Carolina Coal Ash Spill


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EDEIN NORTH CAROLINA COAL ASH SPILL
SURFACE WATER RESULTS

Analyte

Ecological Screening
Standard for Surface
Water Samples1

Duke Outfall A
(near DRSS Boat
Ramp)

Sample Information



Sample ID



EDEN-OUTFL-A-SW-

20140215

Anions

SW9056A





Bromide

-

-

0.370J

mg/L

Chloride

230

mg/L

61

mg/L

Sulfate

-

-

57

mg/L

Wet Chemistry

EPA

310.2/SM2340B/SW9040
C/SW9060A



Alkalinity, Total (As CaC03)

-

-

37.2

mg/L

Hardness, Calcium/Magnesium (As CaC03)

-

-

149

mg/L

Organic Carbon, Dissolved

-

-

3.16J+

mg/L

pH

6.5-9.0

std

7.00J

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


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