Smith Branch Monitoring Sites Monitoring Data Summary for February 15Th, 2018

Smith Branch Monitoring Sites Monitoring Data Summary for February 15th, 2018 – March 27th, 2018

Data Gaps • During this monitoring period, there were periods of fouling turbidity data observed at both SMIA and SMIB that was removed from the dataset. • At the SMIB station, the specific conductivity sensor and temperature sensor became unsubmerged. During periods where the specific conductivity and temperature sensors were unsubmerged, DO and pH values, which are temperature dependent, were removed from the dataset.

SCDHEC Standards • The SMIA station recorded a minimum pH value of 5.6. These low pH values occurred during the storm event on March 20th. • The SMIB station 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 7.9 mg/L and 9.2 mg/L, respectively, which are well above the SCDHEC daily average standard of 5 mg/L. • The minimum DO concentrations were 5.0 mg/L and 6.8 mg/L at the SMIA and SMIB stations, respectively, which are both above the SCDHEC minimum level of 4 mg/L.

Storm Events • Both Smith Branch stations recorded seven storms (at least 0.1 inches) in this monitoring period that resulted in 3.4 inches of precipitation at SMIA and 3.2 inches of precipitation at SMIB. • 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 17.7 days prior to the February 25th storm event at SMIA and 20.8 days prior to the February 28th storm event at SMIB.

Potential Illicit Discharges and Abnormal Events • Slightly elevated turbidity levels were observed at SMIA on February 26th-27th and March 7th. • Several elevated specific conductivity levels were observed at SMIA on: February 24th-25th, March 16th-17th, and 24th-25th.

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

Notes • Minor gaps observed in the pressure transducer dataset during this monitoring period will be replaced with secondary onsite stage data within the continuous dataset.

Continuous Water Quality Monitoring Periodic Report Smith Branch A (February 15, 2108 -- March 27, 2018)

CONTINUOUS SUMMARY STATISTICS PARAMETER DESCRIPTION WATER QUALITY MINIMUM MAXIMUM MEDIAN MEAN STANDARD PARAMETERS: OBSERVED OBSERVED OBSERVED OBSERVED DEVIATION

STREAM NAME: Smith Branch STAGE (FT): 1.8 5.2 1.9 1.9 0.2

LOCATION: Earlewood Park 1111 Parkside Dr TEMPERATURE (°F): 46 69 57 58 5 ADDRESS: Columbia, SC 29201

COORDINATES: 34.027289,-81.04265 TURBIDITY (NTU): 3 595 12 27 41 TMDL/IMPAIRMENT: Fecal Coliform NEIGHBORING Residential and commercial LANDUSE: pH: 5.6 6.9 6.6 6.6 0.1 SPATIAL LOCATION: Most upstream site SPECIFIC TOTAL NO. STORMS 7 CONDUCTIVITY 0.027 0.334 0.163 0.159 0.034 OVER 0.1 INCH: (mS/cm): MAX. DAILY RAINFALL: 1.0 inches DISSOLVED TOTAL RAINFALL 5.0 9.8 7.8 7.9 0.8 3.4 inches OXYGEN (mg/L): (FOR PERIOD):

Stage & Rainfall 9 0.00 7 0.25 5 0.50

Stage,ft 3 0.75 1 1.00 in Rainfall, 2/15 2/17 2/19 2/21 2/23 2/25 2/27 3/1 3/3 3/5 3/7 3/9 3/11 3/13 3/15 3/17 3/19 3/21 3/23 3/25 3/27

Water Temp 75 65 F ° 55 45 2/15 2/17 2/19 2/21 2/23 2/25 2/27 3/1 3/3 3/5 3/7 3/9 3/11 3/13 3/15 3/17 3/19 3/21 3/23 3/25 3/27

Turbidity 600 450 300 NTU 150 0 2/15 2/17 2/19 2/21 2/23 2/25 2/27 3/1 3/3 3/5 3/7 3/9 3/11 3/13 3/15 3/17 3/19 3/21 3/23 3/25 3/27

pH 7.0 6.7 6.4

pH 6.1 5.8 5.5 2/15 2/17 2/19 2/21 2/23 2/25 2/27 3/1 3/3 3/5 3/7 3/9 3/11 3/13 3/15 3/17 3/19 3/21 3/23 3/25 3/27

Specific Conductivity 0.35 0.30 0.25 0.20 0.15

mS/cm 0.10 0.05 0.00 2/15 2/17 2/19 2/21 2/23 2/25 2/27 3/1 3/3 3/5 3/7 3/9 3/11 3/13 3/15 3/17 3/19 3/21 3/23 3/25 3/27

SCDHEC in-stream standard: Daily average not less than 5 mg/L with a low of 4 mg/L Dissolved Oxygen 4 mg/L (SCDHEC Low Standard) 11 9 7 mg/L 5 3 2/15 2/17 2/19 2/21 2/23 2/25 2/27 3/1 3/3 3/5 3/7 3/9 3/11 3/13 3/15 3/17 3/19 3/21 3/23 3/25 3/27

Note: Data gaps appear when the sonde is removed for calibration or when the flow depth is below the sensors REPORT GENERATED ON 4/20/2018 Continuous Water Quality Monitoring Periodic Report Smith Branch A (February 15, 2108 -- March 27, 2018)

Explanation of Statistics:

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

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

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

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

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

Grab Sample Data:

Sample 1 Sample 2 Sample 3 Sample 4 Analyte 2/26/2018 (units) Time Result Time Result Time Result Time Result Escherichia coli 11:50 148 (MPN/100mL) Total Suspended Solids (mg/L) Total Phosphorus (mg/L) Total Nitrogen (mg/L) Note: One sample was collected at this site at the start of rain event, however, the rain event produced less rain than expected so further samples were not collected.

REPORT GENERATED ON 4/20/2018 Continuous Water Quality Monitoring Periodic Report Smith Branch B (February 15, 2108 -- March 27, 2018)

SUMMARY STATISTICS CONTINUOUS PARAMETER DESCRIPTION WATER QUALITY MINIMUM MAXIMUM MEDIAN MEAN STANDARD PARAMETERS: OBSERVED OBSERVED OBSERVED OBSERVED DEVIATION

STREAM NAME: Smith Branch STAGE (FT): 0.2 4.2 0.3 0.3 0.2

LOCATION: Off Mountain Drive 3950 Clement Rd TEMPERATURE (°F): 45 68 58 58 6 NEAREST ADDRESS: Columbia, SC 29203 COORDINATES: 34.037933,-81.0591 TURBIDITY (NTU): 1 571 13 27 45 TMDL/IMPAIRMENT: Fecal Coliform NEIGHBORING Residential and commercial LANDUSE: pH: 6.4 8.6 7.0 7.1 0.3 SPATIAL LOCATION: Most Downstream Site SPECIFIC TOTAL NO. STORMS 7 CONDUCTIVITY 0.026 0.251 0.141 0.129 0.038 OVER 0.1 INCH: (mS/cm): MAX. DAILY RAINFALL: 1.0 inches DISSOLVED OXYGEN TOTAL RAINFALL (FOR 6.8 12.7 9.1 9.2 1.1 3.2 inches (mg/L): PERIOD):

Stage & Rainfall 10 0.00 8 0.25 6 0.50 4 0.75 2 1.00 Stage,ft 0 1.25 in Rainfall, 2/15 2/17 2/19 2/21 2/23 2/25 2/27 3/1 3/3 3/5 3/7 3/9 3/11 3/13 3/15 3/17 3/19 3/21 3/23 3/25 3/27

Water Temp 70 60 F ° 50 40 2/15 2/17 2/19 2/21 2/23 2/25 2/27 3/1 3/3 3/5 3/7 3/9 3/11 3/13 3/15 3/17 3/19 3/21 3/23 3/25 3/27

Turbidity 600 450 300 NTU 150 0 2/15 2/17 2/19 2/21 2/23 2/25 2/27 3/1 3/3 3/5 3/7 3/9 3/11 3/13 3/15 3/17 3/19 3/21 3/23 3/25 3/27

pH 9.0 8.6 8.2 7.8

pH 7.4 7.0 6.6 6.2 2/15 2/17 2/19 2/21 2/23 2/25 2/27 3/1 3/3 3/5 3/7 3/9 3/11 3/13 3/15 3/17 3/19 3/21 3/23 3/25 3/27

Specific Conductivity 0.30 0.25 0.20 0.15

mS/cm 0.10 0.05 0.00 2/15 2/17 2/19 2/21 2/23 2/25 2/27 3/1 3/3 3/5 3/7 3/9 3/11 3/13 3/15 3/17 3/19 3/21 3/23 3/25 3/27

SCDHEC in-stream standard: Daily average not less than 5 mg/L with a low of 4 mg/L Dissolved Oxygen 4 mg/L (SCDHEC Low Standard) 13 11 9

mg/L 7 5 3 2/15 2/17 2/19 2/21 2/23 2/25 2/27 3/1 3/3 3/5 3/7 3/9 3/11 3/13 3/15 3/17 3/19 3/21 3/23 3/25 3/27

Explanation of Statistics:

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

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

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

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

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

Sampled Data:

Sample 1 Sample 2 Sample 3 Sample 4 Analyte 2/26/2018 (units) Time Result Time Result Time Result Time Result Escherichia coli 11:35 194 (MPN/100mL) Total Suspended Solids (mg/L)

Total Phosphorus (mg/L) Total Nitrogen (mg/L) Note: One sample was collected at this site at the start of rain event, however, the rain event produced less rain than expected so further samples were not collected.

REPORT GENERATED ON 4/20/2018