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Station Info: NTTA0902

 
Station ID Year Jurisdiction Watershed Location Description     Latitude         Longitude    
NTTA0902 2009 NTTA Cottonwood Branch Dallas North Tollway, Northbound between El Dorado and SH-380 33.1603305 -96.8406388

Sampled Events

1st Quarter:
Storm
Summary
Storm
Start
Storm
End
Description Rainfall
Station
Rainfall
Total (in)
Peak
Rate (in)
Antecedent Dry
Period (hrs)
1/26/2009 4:25:00 PM 1/26/2009 7:45:00 PM Light to moderate rain fell over the northwestern portions of the Metroplex preceding a cold front boundary. NTTA0901 0.15 0.09 482
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
1/26/2009 5:10:00 PM 1/26/2009 8:25:00 PM 5:42:00 PM 7:48:00 PM 6 1.7 1.6 3.5 37.4 The flow end time and date are a result of the sampling equipment being removed at the conclusion of the sampling activities. An additional false aliquot was recorded by the automatic sampler at the second jar.
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
(µg/L)
Cadmium
Total (mg/L)
240 36 8.49 40 2.2 0.42 J 0.23 *** <0.002 U 0.008 J 0.0685 J 0.038 J 0.078 J <0.037 U <0.001 U
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 7.57 9.08 100 4800 ***

2nd Quarter:
Storm
Summary
Storm
Start
Storm
End
Description Rainfall
Station
Rainfall
Total (in)
Peak
Rate (in)
Antecedent Dry
Period (hrs)
4/17/2009 10:38:00 AM 4/17/2009 1:13:00 PM Widespread showers and thunderstorms moved across the region from west to east. KTXPROSP7 0.69 0.36 120
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
4/17/2009 10:38:00 AM 4/17/2009 1:20:00 PM 10:38:00 AM 12:59:00 PM 7 2.7 1.9 4 56.8 An additional aliquot was collected at the end of the program due to a programming modification. The sample is considered valid and the program will be corrected.
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
(µg/L)
Cadmium
Total (mg/L)
96 104 6.24 46 3.9 <0.05 U 0.11 *** <0.002 U <0.003 U <0.008 U <0.004 U 0.748 J <0.037 U <0.001 U
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 7.7 6.9 200 82000 ***

3rd Quarter:
Storm
Summary
Storm
Start
Storm
End
Description Rainfall
Station
Rainfall
Total (in)
Peak
Rate (in)
Antecedent Dry
Period (hrs)
7/27/2009 9:00:00 AM 7/27/2009 3:55:00 PM An area of rainfall moved across the region from the west to the east. NTTA0901 1.43 0.83 167
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
7/27/2009 9:20:00 AM 7/27/2009 12:25:00 PM 10:07:00 AM 12:11:00 PM 6 3.3 2 3.5 75.3 The flow end time and date are a result of the sampling equipment being removed at the conclusion of the sampling activities. An additional aliquot is shown on the graph due to initializing the automatic sampler twice but was not collected.
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
(µg/L)
Cadmium
Total (mg/L)
166 85 14.1 4.9 4.8 0.1 0.22 *** <0.002 U 0.005 J 0.07 0.012 0.059 <0.037 U <0.001 U
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 7.76 7.05 5000 120000 ***

4th Quarter:
Storm
Summary
Storm
Start
Storm
End
Description Rainfall
Station
Rainfall
Total (in)
Peak
Rate (in)
Antecedent Dry
Period (hrs)
10/1/2009 5:36:00 PM 10/1/2009 5:57:00 PM A line of showers and thunderstorms moved across the region from the northwest to the southeast preceding a cool front. KTXPROSP7 0.12 0.12 219
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
10/1/2009 5:45:00 PM 10/1/2009 9:00:00 PM 5:49:00 PM 8:02:00 PM 6 3 2 3.5 67 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
(µg/L)
Cadmium
Total (mg/L)
256 70 4.46 21 3 0.32 0.29 *** <0.002 U <0.003 U <0.008 U <0.004 U <0.003 U <0.037 U <0.001 U
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 7.49 7.09 6200 4300000 ***

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
NTTA0901 689 139.8 9.5 42.1 1.925 0.0575 0.436 0.007 0.021 0.0573 0.013 0.0833 0.0185 0.0005 8.55 2126 40326 7.78 6.97
NTTA0902 189.5 73.8 8.3 28 3.475 0.2163 0.213 0.001 0.004 0.0366 0.014 0.2216 0.0185 0.0005 0.7 887 119379 7.62 7.13

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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