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Station Info: NT1501

 
Station ID Year Jurisdiction Watershed Location Description     Latitude         Longitude    
NT1501 2015 North Texas Tollway Authority Prairie Creek Elm Fork Trinity River Unnamed Tributary at SRT N. of Hebron Pkwy 33.02741 -96.931512

Sampled Events

1st Quarter:
Storm
Summary
Storm
Start
Storm
End
Description Rainfall
Station
Rainfall
Total (in)
Peak
Rate (in)
Antecedent Dry
Period (hrs)
1/1/2015 7:20:00 AM 1/1/2015 10:20:00 AM Large storms formed southwest of the Dallas Fort-Worth metroplex and moved across the region in a northeast direction bringing light to medium rainfall. NT1501 0.3 0.15 213
Collection
Info
Flow
Start
Flow
End
1st Aliquot
Collected
Last Aliquot
Collected
# Aliquots
Collected
Peak
Depth (ft)
Avg
Depth (ft)
Sample
Volume (gal)
Ambient Air
Temp (°F)
Water
Temp (°F)
Sample
Comments
1/11/2015 12:15:00 AM 1/11/2015 3:05:00 PM 1/11/2015 1:32:00 AM 1/11/2015 3:40:00 AM 6 2.2 1 3.5 35 39.2 The flow end time and date are a result of the sampling equipment being removed at the conclusion of the sampling activities.
Composite TDS
(mg/L)
TSS
(mg/L)
BOD
(mg/L)
COD
(mg/L)
Nitrogen
Total (mg/L)
Phosphorus
Dissolved (mg/L)
Phosphorus
Total (mg/L)
Carbaryl
Total (mg/L)
Arsenic
Total (mg/L)
Chromium
Total (mg/L)
Copper
Total (mg/L)
Lead
Total (mg/L)
Zinc
Total (mg/L)
Diazinon Cadmium
236 43.25 2.33 <1 U 1.36 0.07 0.12 <0.06 U <0.002 U 0.004 J 0.026 <0.004 U 0.017 ** **
Grab Oil & Grease
(mg/L)
pH Lab
(su)
pH Field
(su)
E.Coli
(col/100mL)
Total Coliform
(col/100mL)
Specific Conductivity
(uS/cm)
  PDF icon  Download Lab Report
<1.4 U 8.8 1500 13000 1645

2nd Quarter:
Storm
Summary
Storm
Start
Storm
End
Description Rainfall
Station
Rainfall
Total (in)
Peak
Rate (in)
Antecedent Dry
Period (hrs)
4/17/2015 8:20:00 PM 4/17/2015 11:05:00 PM Large storms formed west of the Dallas Fort-Worth metroplex and moved across the region in an eastern direction bringing heavy rainfall. NT1501 0.81 0.59 105
Collection
Info
Flow
Start
Flow
End
1st Aliquot
Collected
Last Aliquot
Collected
# Aliquots
Collected
Peak
Depth (ft)
Avg
Depth (ft)
Sample
Volume (gal)
Ambient Air
Temp (°F)
Water
Temp (°F)
Sample
Comments
4/17/2015 8:50:00 PM 4/18/2015 6:55:00 AM 4/17/2015 8:55:00 PM 4/18/2015 5:50:00 AM 6 2.8 1.4 3.5 64 66.2
Composite TDS
(mg/L)
TSS
(mg/L)
BOD
(mg/L)
COD
(mg/L)
Nitrogen
Total (mg/L)
Phosphorus
Dissolved (mg/L)
Phosphorus
Total (mg/L)
Carbaryl
Total (mg/L)
Arsenic
Total (mg/L)
Chromium
Total (mg/L)
Copper
Total (mg/L)
Lead
Total (mg/L)
Zinc
Total (mg/L)
Diazinon Cadmium
336 93.33 20 37 <0.05 U 0.43 0.67 <0.06 U <0.002 U 1.538 0.063 0.009 J 0.071 ** **
Grab Oil & Grease
(mg/L)
pH Lab
(su)
pH Field
(su)
E.Coli
(col/100mL)
Total Coliform
(col/100mL)
Specific Conductivity
(uS/cm)
  PDF icon  Download Lab Report
<1.4 U 8.6 1800 20000 592

3rd Quarter:
Storm
Summary
Storm
Start
Storm
End
Description Rainfall
Station
Rainfall
Total (in)
Peak
Rate (in)
Antecedent Dry
Period (hrs)
9/9/2015 3:25:00 AM 9/9/2015 5:45:00 AM Large storms formed northwest of the Dallas-Fort Worth metroplex and moved across the region in a southeast direction bringing moderate rainfall. NT1501 0.28 0.16 1501
Collection
Info
Flow
Start
Flow
End
1st Aliquot
Collected
Last Aliquot
Collected
# Aliquots
Collected
Peak
Depth (ft)
Avg
Depth (ft)
Sample
Volume (gal)
Ambient Air
Temp (°F)
Water
Temp (°F)
Sample
Comments
9/9/2015 4:15:00 AM 9/9/2015 7:10:00 AM 9/9/2015 4:24:00 AM 9/9/2015 6:26:00 AM 6 1 0.8 3.5 75 75.7
Composite TDS
(mg/L)
TSS
(mg/L)
BOD
(mg/L)
COD
(mg/L)
Nitrogen
Total (mg/L)
Phosphorus
Dissolved (mg/L)
Phosphorus
Total (mg/L)
Carbaryl
Total (mg/L)
Arsenic
Total (mg/L)
Chromium
Total (mg/L)
Copper
Total (mg/L)
Lead
Total (mg/L)
Zinc
Total (mg/L)
Diazinon Cadmium
416 30.67 5.68 42 5.57 0.18 0.28 <0.06 U <0.002 U 0.005 J 0.006 J <0.004 U 0.015 ** **
Grab Oil & Grease
(mg/L)
pH Lab
(su)
pH Field
(su)
E.Coli
(col/100mL)
Total Coliform
(col/100mL)
Specific Conductivity
(uS/cm)
  PDF icon  Download Lab Report
<1.4 U 8.5 600 2000 2910

4th Quarter:
Storm
Summary
Storm
Start
Storm
End
Description Rainfall
Station
Rainfall
Total (in)
Peak
Rate (in)
Antecedent Dry
Period (hrs)
10/22/2015 4:35:00 PM 10/22/2015 8:15:00 PM Large storms formed southwest of the Dallas Fort-Worth metroplex and moved across the region in a northeast direction bringing heavy rainfall. NT1501 0.88 0.37 794
Collection
Info
Flow
Start
Flow
End
1st Aliquot
Collected
Last Aliquot
Collected
# Aliquots
Collected
Peak
Depth (ft)
Avg
Depth (ft)
Sample
Volume (gal)
Ambient Air
Temp (°F)
Water
Temp (°F)
Sample
Comments
10/22/2015 4:50:00 PM 10/22/2015 8:40:00 PM 10/22/2015 5:02:00 PM 10/22/2015 7:05:00 PM 6 1.7 1.2 3.5 67 71.2
Composite TDS
(mg/L)
TSS
(mg/L)
BOD
(mg/L)
COD
(mg/L)
Nitrogen
Total (mg/L)
Phosphorus
Dissolved (mg/L)
Phosphorus
Total (mg/L)
Carbaryl
Total (mg/L)
Arsenic
Total (mg/L)
Chromium
Total (mg/L)
Copper
Total (mg/L)
Lead
Total (mg/L)
Zinc
Total (mg/L)
Diazinon Cadmium
780 168 6.43 214 7.23 0.07 0.33 <0.06 U 0.005 0.016 0.036 0.007 J 0.144 ** **
Grab Oil & Grease
(mg/L)
pH Lab
(su)
pH Field
(su)
E.Coli
(col/100mL)
Total Coliform
(col/100mL)
Specific Conductivity
(uS/cm)
  PDF icon  Download Lab Report
<1.4 U 8.1 4500 79000 1850

Station Averages

Station TDS TSS BOD COD Nitrogen Phosphorus
(Dissolved)
Phosphorus
(Total)
Carbaryl Arsenic Chromium Copper Lead Zinc Diazinon Cadmium Oil &
Grease
E.
Coli
Coliform
(Total)
pH
Lab
pH
Field
Specific Conductivity
NT1501 442 83.8 8.6 73.4 3.546 0.1875 0.35 0.03 0.002 0.391 0.0328 0.005 0.0618 0.7 1643 14237 8.42 1749.25
NT1502 254 117.3 4.1 13.9 4.158 0.14 0.195 0.0301 0.002 0.003 0.0155 0.002 0.0253 0.7 1804 22931 8.04 605

Key:
< or > - Amount detected is above or below equipment detection limit A - Approximate end time of flow due to power failure A-01 - >400000
B-02 - BOD result calculated from COD analysis D-1 - Elevated reporting limit(s) due to dilution. This has no effect on the data. Sample result is considered valid. DET - Analyte Detected
DRY – Sample results reported on a dry weight basis E - End time of flow due to equipment removal from site IS - Insufficient Sediment within Sample
J - Detected but below the reporting limit N/A - Data not available at this time ND - Analyte not detected at or above the reporting limit
NR - Not Reported NST – No Sample Taken U - Undetected
W-05 - Highest possible dilutions were made by the laboratory Qual – Qualifiers Q-5 - Seed correction outside desired limits. This has no effect on the data. Sample result is considered valid.
Q11 - Insufficient sample for analysis of matrix spike. This has no effect on the data. Sample result is considered valid. RPD - Relative Percent Difference S-1 - Laboratory container pH was above desired amount. This has no effect on the data. Sample result is considered valid.
TNTC - Too numerous to count U – Undetected W-05 - Highest possible dilutions were made by the laboratory
     
BOD - Biochemical Oxygen Demand BRL - Below Reading Limit COD - Chemical Oxygen Demand
TDS - Total Dissolved Solids TSS - Total Suspended Solids by EPA 160.2 PC - Sample results suspect due to post-calibration results
**This data was only collected in the second permit term. ***This data is only being collected in the third permit term.  


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