Master Plan Development - City of Boca Raton

City of Boca Raton Regulatory Information SummaryMS4 NPDES Permit Programbut may be duplicated across agencies. Data for these sites are assigned a unique agency code and stationidentification in the State’s database.Figure 1 depicts the site locations and shows the boundaries of the associated watersheds. Sitesmonitored by ERM are shown as circles, and those monitored by the LRD are shown as squares. Hollowsymbols signify marine or tidal sites and solid symbols designate freshwater sites. The only monitoringconducted within the City for the MS4 NPDES program is along the C-15 canal. There is currently nomonitoring for the Hillsboro Canal or its tributaries.Since the initiation of the MS4 NPDES monitoring program in 1998, procedural modifications haveresulted in the discontinuation of sampling at certain sites in close proximity to others. This change wasmade to prevent bias in the dataset caused by the inclusion of repetitive or very similar values whichcould compromise the representative distribution of the results. These changes appear in Table 1 as twovalues in the site designation column separated by a slash, with the first of the two values being the active(current) designation. This allows for easy reference when comparing data values within a watershed tothose contained in previous reports.In the last year, FDEP discontinued monitoring of eight marine sites located within the Lake WorthLagoon/Intracoastal watershed. ERM assumed responsibility for sample collection and analysis of six ofthose sites (marked with an asterisk in the agency column of Table 1). In addition, twelve new freshwatersites along the Chain of Lakes and E-4 Canal (marked with an asterisk in the site designation column inTable 1) have been added to the program.The LRD monitors four marine sites and one freshwater site. ERM now monitors ten marine sites, andtwenty-three freshwater sites. ERM is also contracted by SFWMD to perform the sample collections forthe upstream (freshwater) side of six SFWMD control structures which discharge freshwater to theIntracoastal.For the 39 sites monitored by ERM, water samples are collected and water quality physical parametersare measured in-situ by ERM staff using a multi-parameter water quality monitoring instrument. Watersamples are collected, preserved and stored according to the FDEP Standard Operating Procedures.Quality assurance/quality control measures include pre-cleaned equipment blanks, field cleanedequipment blanks, field spikes, and the collection of duplicate samples.Analyses of freshwater samples (excluding metals) for all ERM sites are conducted by SFWMD at theirlaboratory facilities. Samples from these sites are analyzed for metals by an independent laboratory undercontract with ERM. Analyses of marine samples for all ERM sites is by contract with a specializedL:\boca\bocaswmp\A6016.02\Final Task 2 Report - 1-07-08\r01acjh.docPage 10MOCK•ROOS