representative sampling of inner-city creeks . Currently , the city monitors thirty-two ( 32 ) sample sites . Sampling at each of the thirty-two sites includes eleven ( 11 ) water quality parameters determined to provide a good indication of the presence of illicit discharges . Parameters include : pH , dissolved oxygen , specific conductivity , air temperature , sample temperature , surfactants , chlorine , copper , phenols , ammonia , and visual observation . A total of 370 monthly inner creek sampling events occurred during the reporting period .
Nineteen ( 19 ) illicit discharges were found as a result of dry weather screening and monthly in-situ sampling . III .
Wet Weather Monitoring – RWWCP
The City monitors wet weather events through a wet weather screening program designed to identify and investigate areas that may contribute excessive concentrations of pollutants to the MS4 , and to establish baseline data on receiving streams . The City ’ s wet weather monitoring efforts are coordinated by the NCTCOG through its RWWCP . Participation in the RWWCP was offered as an option in Part IV . A . 1 of the City ’ s TPDES Phase 1 MS4 permit . NCTCOG provides all RWWCP data to the TCEQ on behalf of the participating entities . The City collects water quality data from NCTCOG quarterly or when published .
The third term of the RWWCP spanned 2011-2015 , thus the conclusion of monitoring efforts occurred in 2015 . Monitoring resumed in FY2018 under new contract with the NCTCOG . The results of those monitoring activities are available in Appendix D . RWWCP sample locations for the new monitoring term ( including the 3-IRP ) are identified below . The new monitoring term will span 2018 through 2022 .
Watershed Station ID Location Latitude & Longitude
Johnson Creek |
AR1801 / AR1901 |
Johnson Creek @ |
|
|
Copland Drive |
AR1801A 1 / AR1901A 1
Johnson Creek @ Sanford St .
32.7588056 97.0670278
32.7428360 97.087583
Fish Creek |
AR1802 / AR1902 |
Fish Creek @ SH 360 |
32.6623528 |
|
|
|
97.0613889 |
Number of samples taken & type
Offline due to flooding
5 ( Chemical )
5 ( Chemical )
1
Due to flooding in the region in FY18 , AR1801 / AR1901 was moved to a new location and was renamed AR1801A / AR1901A .
IV .
Industrial and High-Risk Monitoring
In the 3-IRP , twelve ( 11 ) industrial facilities were identified as having benchmark requirements . Benchmarks are due to TCEQ and the City of Arlington on March 31 annually and cover the period from January 1 of the previous year through December 31 . The benchmark reporting indicated below covers the period January 1 , 2019 through December 31 , 2019 – a portion of the 3-IRP . Environmental Management staff will not receive the benchmarks for the remaining portion of the 3-IRP until March 31 , 2019 . As of the writing of this report , nine ( 9 ) facilities of the eleven facilities have submitted a copy of their benchmark data to the City of Arlington . Three ( 3 ) facilities were compliant ; and three ( 3 ) were non-compliant , each having exceeded benchmark parameters . Three ( 3 ) facilities remain on corrective action plans from FY17 .
Industrial Facilities – Benchmark Requirements
Quantity Compliant Facilities 3
Non-Compliant Facilities : Exceeded Benchmarks 3 Facilities on Corrective Action Plans 3
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