V .
MS4 Screening and Illicit Discharge Inspections
The City of Arlington has implemented a Dry Weather Screening and Monthly Routine Screening program to locate portions of the MS4 with suspected illicit discharges and improper disposals . Results of screening efforts during this permit term as well as a more complete description of the program may be found in MCM 8 , Monitoring , Evaluation , and Reporting . The entire MS4 , but not necessarily each individual outfall , is screened at least once during the five-year permit term .
VI . Automotive Related Businesses ( ARB )
The City of Arlington ARB program was created in April 2017 after several routine water quality investigations near concentrations of ARB facilities indicated increased levels of hazardous pollutants . Over 1000 ARBs are located within the Arlington city limits . ARB programming is implemented in three parts : facility verification , facility inspection and education , and monitoring . Verification and inspection results for FY21 are listed below . Results of screening efforts during this permit term as well as a more complete description of the program may be found in MCM 8 , Monitoring , Evaluation , and Reporting .
ARB Activity |
Amount |
Inspections |
305 |
Verifications * |
64 |
New Businesses ** |
15 |
* Verifications – Verify location and suitability of business to be categorized for ARB programmatic activities |
** New businesses – those establishing operations for the first time in the City of Arlington and added to the master list of ARB facilities . |
VII .
NPDES and TPDES Permittee List
The City of Arlington maintains an industrial and construction database containing a list of operators and construction sites that are located within the Arlington city limits . This database contains the name , location , and permit number ( when applicable ) that authorizes stormwater discharges from construction activities .
VIII .
MS4 Map
The City of Arlington presently operates a system with approximately 3,511 storm sewer outfalls , 592.2 miles of storm sewer pipe , and about 12,061 inlets . In the previous permit term , the City implemented an asset identification and inventory program to track all MS4 assets . Unique identifiers are assigned to allow for efficient tracking of system conditions , inspections , and maintenance . The system is GIS based and integrates system inventory data into a system map . Outfall verifications , inlet and manhole locations , and storm sewer pipe identification are continuous activities .
IX .
Spill Prevention and Response
The Hazardous Materials Response Team ( HMRT ) of the City ’ s Fire Department and Environmental Specialists provide spill response for hazardous material spills . The HMRT provides initial response and containment , while Environmental Specialists ensure removal of the spilled material in a manner that protects water quality . If the spill is minor ( i . e . is not of reportable quantity ), the HMRT will respond and perform the necessary removal actions themselves . There were no changes to the hazardous material spill response procedures during FY21 .
During the reporting period , the HMRT expended over 500 man-hours responding to 732 HAZMAT incidents . These are outlined below .
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