Smith Branch Monitoring Sites Monitoring Data Summary for

January 4th, 2018 – February 14th, 2018 Data Gaps

• During this monitoring period, the turbidity sensor at the SMIA station became fouled and the periods of data when the sensor was fouled were removed. Turbidity at the SMIB station became fouled from January 20th -23rd and that period of data was also removed.

• At the SMIB station, the specific conductivity sensor was unsubmerged for several intervals across the deployment period and that data was removed from the dataset.

SCDHEC Standards

• The SMIA and SMIB stations did not record any pH readings outside of the acceptable SCDHEC range of 6 to 8.5.

• The SMIA and SMIB stations recorded average DO concentrations of 10.8 mg/L and 10.0 mg/L, respectively, which are well above the SCDHEC daily average standard of 5 mg/L.

• The minimum DO concentrations were 8.2 mg/L and 5.2 mg/L at the SMIA and SMIB stations, respectively, which are both above the SCDHEC minimum level of 4 mg/L.

Storm Events

• Both SMIA rain gauge recorded five storm events resulting in 4.1 inches of precipitation and the SMIB rain gauge recorded six storm events resulting in 4.0 inches of precipitation in this monitoring period.

• The Smith Branch monitoring stations both recorded typical water quality responses to the storm events observed during this monitoring period.

• The maximum antecedent dry time since the last significant precipitation event (at least 0.1 inch) was approximately 18.7 days prior to the January 11th storm event at SMIA and 19.5 days prior to the January 12th storm event at SMIB.

Potential Illicit Discharges and Abnormal Events

• Several elevated specific conductivity levels were observed at SMIA on: January 5th- 9th, 12th, 17th, 19th-20th, and 23rd-24th.

• Several elevated specific conductivity levels were observed at SMIB on: January 7th-9th, 12th, 17th-18th, 20th-21st, 30th, and February 1st.

• Abnormal rapid fluctuations in stage were observed at both Smith Branch stations from January 30th to February 4th, between two storm events. Water quality parameters responded with the same trend as the change in stage, indicating that the abnormal event occurred in the watershed. Due to the scale of the monthly periodic reports, below, a screenshot of the SMIA stage data and PT data is included on the next page.

Flow Measurements

• No flow measurements were taken in this watershed during this monitoring period.

The selected image above shows the abnormal stage fluctuations in the Smith Branch watershed. The blue graph (top) is the 15-minute water stage from the multi-parameter data sonde and the orange graph (bottom) is one-minute water stage data.

Continuous Water Quality

Monitoring Periodic Report

Smith Branch A (January 4, 2018 -- February 14, 2018)

MINIMUM

OBSERVED

MAXIMUM

OBSERVED

MEDIAN

OBSERVED

MEAN

OBSERVED

STANDARD

DEVIATION

STREAM NAME: STAGE (FT): 1.9 4.2 1.9 2.0 0.2

LOCATION:

ADDRESS:

COORDINATES:

TMDL/IMPAIRMENT:

NEIGHBORING

LANDUSE:

SPATIAL LOCATION:

MAX. DAILY RAINFALL: 1.5 inches

TOTAL RAINFALL

(FOR PERIOD):4.0 inches

34.027289,-81.04265

Fecal Coliform

Residential and commercial

Most upstream site

PARAMETER

Smith Branch

Earlewood Park

DESCRIPTION

1111 Parkside Dr

Columbia, SC 29201

CONTINUOUS

WATER QUALITY

PARAMETERS:

SUMMARY STATISTICS

TEMPERATURE (°F): 36 63 49 49 6

TURBIDITY (NTU): 4 549

pH: 6.1 7.1

40

1.4

0.2

0.060

25 37

6.8 6.7

TOTAL NO. STORMS

OVER 0.1 INCH:6 0.165 0.173

10.0 10.0DISSOLVED

OXYGEN (mg/L):5.2 12.8

SPECIFIC

CONDUCTIVITY

(mS/cm):

0.033 0.469

3579

1113

1/4 1/6 1/8 1/10 1/12 1/14 1/16 1/18 1/20 1/22 1/24 1/26 1/28 1/30 2/1 2/3 2/5 2/7 2/9 2/11 2/13 2/15

mg/

L

Dissolved Oxygen 4 mg/L (SCDHEC Low Standard)

0

150

300

450

600

1/4 1/6 1/8 1/10 1/12 1/14 1/16 1/18 1/20 1/22 1/24 1/26 1/28 1/30 2/1 2/3 2/5 2/7 2/9 2/11 2/13 2/15

NTU

Turbidity

0.00

0.25

0.50

0.75

1.001

3

5

7

9

1/4 1/6 1/8 1/10 1/12 1/14 1/16 1/18 1/20 1/22 1/24 1/26 1/28 1/30 2/1 2/3 2/5 2/7 2/9 2/11 2/13 2/15

Rai

nfa

ll, in

Stag

e, f

t

Stage & Rainfall

30

40

50

60

70

1/4 1/6 1/8 1/10 1/12 1/14 1/16 1/18 1/20 1/22 1/24 1/26 1/28 1/30 2/1 2/3 2/5 2/7 2/9 2/11 2/13 2/15

°F

Water Temp

6.06.26.46.66.87.07.2

1/4 1/6 1/8 1/10 1/12 1/14 1/16 1/18 1/20 1/22 1/24 1/26 1/28 1/30 2/1 2/3 2/5 2/7 2/9 2/11 2/13 2/15

pH

pH

0.00.10.20.30.40.5

1/4 1/6 1/8 1/10 1/12 1/14 1/16 1/18 1/20 1/22 1/24 1/26 1/28 1/30 2/1 2/3 2/5 2/7 2/9 2/11 2/13 2/15

mS/

cm

Specific Conductivity

SCDHEC in-stream standard: Daily average not less than 5 mg/L with a low of 4 mg/L

Note: Data gaps appear when the sonde is removed for calibration or when the flow depth is below the sensors

REPORT GENERATED ON 2/22/2018

Continuous Water Quality

Monitoring Periodic Report

Smith Branch A (January 4, 2018 -- February 14, 2018)

Explanation of Statistics:

MINIMUM

OBSERVED

MAXIMUM

OBSERVED

MEDIAN OBSERVED

MEAN OBSERVED

STANDARD

DEVIATION

Grab Sample Data:

Time Result Time Result Time Result Time Result

Escherichia coli

(MPN/100mL)

Total Suspended

Solids (mg/L)

Total Phosphorus

(mg/L)

Total Nitrogen

(mg/L)Note:

The minimum of the values recorded by the datasonde in 15 minute intervals.

The maximum of the values recorded by the datasonde in 15 minute intervals.

The median of all the values recorded by the datasonde in 15 minute intervals.

The average of all the values recorded by the datasonde in 15 minute intervals.

The standard deviation of all the values recorded by the datasonde in 15 minute intervals.

Sample 4Sample 3Sample 1 Sample 2Analyte

(units)

REPORT GENERATED ON 2/22/2018

Continuous Water Quality

Monitoring Periodic Report

Smith Branch B (January 4, 2018 -- February 14, 2018)

MINIMUM

OBSERVED

MAXIMUM

OBSERVED

MEDIAN

OBSERVED

MEAN

OBSERVED

STANDARD

DEVIATION

STREAM NAME: STAGE (FT): 0.2 3.1 0.2 0.3 0.3

LOCATION:

NEAREST ADDRESS:

COORDINATES:

TMDL/IMPAIRMENT:

NEIGHBORING

LANDUSE:

SPATIAL LOCATION:

MAX. DAILY RAINFALL: 1.6 inches

TOTAL RAINFALL (FOR

PERIOD):4.1 inches

34.037933,-81.0591

Fecal Coliform

Residential and commercial

Most Downstream Site

PARAMETER

Smith Branch

DESCRIPTION

Off Mountain Drive

3950 Clement Rd

Columbia, SC 29203

33 63 48 48 7

0.1

TURBIDITY (NTU): 5 301 17 26 29

pH: 6.3 7.2 7.0 7.0

CONTINUOUS

WATER QUALITY

PARAMETERS:

SUMMARY STATISTICS

TEMPERATURE (°F):

TOTAL NO. STORMS

OVER 0.1 INCH:5

1.2

SPECIFIC

CONDUCTIVITY

(mS/cm):

0.033 0.361 0.143 0.144 0.045

DISSOLVED OXYGEN

(mg/L):8.2 13.6 10.8 10.8

3579

111315

1/4 1/6 1/8 1/10 1/12 1/14 1/16 1/18 1/20 1/22 1/24 1/26 1/28 1/30 2/1 2/3 2/5 2/7 2/9 2/11 2/13 2/15

mg/

L

Dissolved Oxygen 4 mg/L (SCDHEC Low Standard)

050

100150200250300350

1/4 1/6 1/8 1/10 1/12 1/14 1/16 1/18 1/20 1/22 1/24 1/26 1/28 1/30 2/1 2/3 2/5 2/7 2/9 2/11 2/13 2/15

NTU

Turbidity

0.00

0.25

0.50

0.75

1.000

2

4

6

8

1/4 1/6 1/8 1/10 1/12 1/14 1/16 1/18 1/20 1/22 1/24 1/26 1/28 1/30 2/1 2/3 2/5 2/7 2/9 2/11 2/13 2/15

Rai

nfa

ll, in

Stag

e, f

t

Stage & Rainfall

30

40

50

60

70

1/4 1/6 1/8 1/10 1/12 1/14 1/16 1/18 1/20 1/22 1/24 1/26 1/28 1/30 2/1 2/3 2/5 2/7 2/9 2/11 2/13 2/15

°F

Water Temp

6.26.46.66.87.07.27.4

1/4 1/6 1/8 1/10 1/12 1/14 1/16 1/18 1/20 1/22 1/24 1/26 1/28 1/30 2/1 2/3 2/5 2/7 2/9 2/11 2/13 2/15

pH

pH

0.0

0.1

0.2

0.3

0.4

1/4 1/6 1/8 1/10 1/12 1/14 1/16 1/18 1/20 1/22 1/24 1/26 1/28 1/30 2/1 2/3 2/5 2/7 2/9 2/11 2/13 2/15

mS/

cm

Specific Conductivity

SCDHEC in-stream standard: Daily average not less than 5 mg/L with a low of 4 mg/L

Note: Data gaps appear when the sonde is removed for calibration or when the flow depth is below the sensors

REPORT GENERATED ON 2/22/2018

Continuous Water Quality

Monitoring Periodic Report

Smith Branch B (January 4, 2018 -- February 14, 2018)

Explanation of Statistics:

MINIMUM

OBSERVED

MAXIMUM

OBSERVED

MEDIAN OBSERVED

MEAN OBSERVED

STANDARD

DEVIATION

Sampled Data:

Time Result Time Result Time Result Time Result

Escherichia coli

(MPN/100mL)

Total Suspended

Solids (mg/L)

Total Phosphorus

(mg/L)

Total Nitrogen

(mg/L)Note:

The minimum of the values recorded by the datasonde in 15 minute intervals.

The maximum of the values recorded by the datasonde in 15 minute intervals.

The average of all the values recorded by the datasonde in 15 minute intervals.

The median of all the values recorded by the datasonde in 15 minute intervals.

The standard deviation of all the values recorded by the datasonde in 15 minute intervals.

Sample 4Sample 3Sample 1 Sample 2Analyte

(units)

REPORT GENERATED ON 2/22/2018