TPDES Stormwater Annual Report FY2019 | Page 151

Analytical Results Summary NCTCOG Regional Stormwater Monitoring Program NCTCOG Project 100063022 CITY OF ARLINGTON 2018
Storm Event : 10 / 24 / 2018
AR 1801A
AR 1802
Project Number : 100063022 PARAMETER NAME
COMPOSITE
COMPOSITE
UNIT
Total Dissolved Solids ( TDS )
N / A
512
mg / L
Total Suspended Solids ( TSS )
N / A
109
mg / L
Biochemical Oxygen Demand ( BOD )
N / A
2.75
mg / L
Chemical Oxygen Demand ( COD )
N / A
19
mg / L
Total Nitrogen
N / A
1.20
mg / L
Nitrate N
N / A
0.45
mg / L
Ammonia N
N / A
0.12
mg / L
Orthophosphate
N / A
< 0.05 U
mg / L
Phosphorus , Dissolved
N / A
< 0.100 U
mg / L
Phosphorus , Total
N / A
0.150
mg / L
Atrazine
N / A
< 0.100 U
μg / L
Arsenic , Total
N / A
0.00324
mg / L
Chromium , Total
N / A
< 0.004 U
mg / L
Copper , Total
N / A
0.00434
mg / L
Lead , Total
N / A
< 0.002 U
mg / L
Zinc , Total
N / A
0.0238
mg / L
PARAMETER NAME
GRAB
GRAB
UNIT
Oil & Grease ( HEM )
N / A
< 2.00 U
mg / L
pH
N / A
9.1
su
Ambient Air Temperature ( field )
N / A
55
° F
Water Temperature ( field )
N / A
61.3
° F
E . Coli
N / A
< 100.0
col / 100 mL
Specific Conductivity
N / A
622
μS / cm
">" - Not Identified Above the Upper Detection Limit "<" - Not Identified Below the Lower Detection Limit J - Positively Identified Below the Lower Detection Limit NST - No Sample Taken U - Undetected