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 Street Division :: Stormwater Utility :: Monitoring Plan |
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I. Monitoring Program Objectives | II. Monitoring Program Goals |
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| I. MONITORING PROGRAM OBJECTIVES |
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| A. |
Overview |
| The primary objective of the City of Hialeah's monitoring plan is to indicate, refine and document water quality, land use-specific pollutant loading, and trends in pollutant loading in the South Florida Water Management District’s C-7 Basin. Its secondary mission is to provide water quality data input to the State of Florida’s Total Maximum Daily Load implementation program. Monitoring is conducted in the South Florida Water Management District’s C-7 Basin, the only currently listed FAC Chapter 62-303(d) water segment located within the City of Hialeah. |
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| B.
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Sampling Criteria |
The City / Miami-Dade County Department of Environmental Management (DERM) Interagency Agreement for Water Quality Monitoring requires sampling the water column at each site bimonthly during the dry season and bimonthly during the wet season during Year’s Three, Four, and Five of its NPDES permit. All sites are sampled within twenty-four (24) hours of each other to provide a synoptic profile of ambient conditions. The grab samples will be taken from the water column at mid-stream at a depth of one meter and analyzed for the following constituents:
- Dissolved Oxygen (metered)
- TSS
- Hardness
- pH
- Total Kjeldahl Nitrogen (as N) (mg/l)
- Nitrate plus Nitrite (as N) (mg/l)
- Total Phosphorus (mg/l)
- Dissolved Phosphorus (mg/l)
- Dissolved Copper (mg/l)
- Dissolved Lead (mg/l)
- Dissolved Zinc (mg/l)
- Dissolved Cadmium (mg/l)
- Fecal Coliform (org/100 ml)
- Enteroccocus (org/100 ml)
These parameters were selected for three reasons:
- The monitoring site locations and parameters to be sampled were selected specifically to identify potential water quality problems in the C-7 Canal and the Red Road Canal.
- The dissolved oxygen parameter because it is one of the only two parameters noted as being “potentially impaired” in the 2002 C-7 / Little River IWR Planning List Report.
- The selected metals and future results may be used to correlate those findings with previous DERM and future sediment sampling results.
The selected parameters are typical of those used to identify urban stormwater runoff-associated pollutants. |
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| C. |
Monitoring Station Locations |
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Monitoring site selection is based upon the concept of assessing water quality in the C-7 primary canal basin as it relates to land use and in close proximity to DERM canal sediment sampling sites (Little River Canal stations). The Red Road Canal stations were selected for two additional reasons; station RR01 will also monitor water quality leaving the Gratigny Canal and RR02 will do these same in regard to waters flowing into the C-6 Canal from the C-7 Basin. A total of four sites are sampled. Land uses bordering these locations range from single family residential to industrial. The NPDES Monitoring Plan Location Map reflects the sampling station reference number, land use, and stormwater outfall locations with pipe size.
Sampling station designators, land use, and locations are:
HIA-LR01 – Little River Canal at W. 16th Avenue and north of E.52nd Street.
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Land use: Commercial
Location: Lat. 25° 52' 10'', Long. 80° 18' 54''
DERM Sediment Site: C75106, C75104 |
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HIA-LR02 - Little River Canal at E. 8th Avenue and south of W. 5Street. |
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Land use: Industrial
Location: Lat. 25° 52' 14'', Long. 80° 16' 01''
DERM Sediment Site: C75205 |
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HIA-RR01 – Red Road Canal at W. 4th Avenue and W. 68th Street.
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Land use: Recreational, Commercial
Location: Lat. 25° 53' 03'', Long. 80° 17' 24''
DERM Sediment Site: None |
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| HIA-RR02 - Red Road Canal at W. 4th Avenue and W. 37 Street. |
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Land use: Institutional, Residential – single family
Location: Lat. 25° 51' 20'', Long. 80° 17' 25''
DERM Sediment Site: None |
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| These sites, in effect, provide a representative water quality indication of waters entering and leaving the confines of the City in the C-7 Basin. They also supplement a water column sampling stations LR08 & LR10 that were established by the DERM over 10 years ago.
The City’s agreement with DERM also includes participation in future sediment sampling that is conducted at the Hialeah sites.
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| D. |
Estimates of Pollutant Loadings |
| The results obtained from the monitoring station sampling may be used to supplement the requirement to estimate seasonal pollutant loading and event mean concentrations in Year Three. Since the monitoring stations are located to provide representative “real world” data associated with the major land uses in the City, that data may prove to be of greater value in assessing watershed trends than estimates based on NURP findings after several years of monitoring results have been obtained. The Watershed Management Model will be used to provide the EMC / seasonal loading data. |
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| E. |
Reporting |
| Data obtained from the monitoring program is submitted in the NPDES annual report beginning in Year Three. The data is summarized in spreadsheet format along with the maximum, minimum, and geometric mean of each parameter on a wet / dry season and annual basis. Discernable trends will also be developed as the database grows. |
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| II. MONITORING PROGRAM GOALS |
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| A. |
Overview |
The goal of the City of Hialeah's stormwater monitoring program is to accomplish the following:
- Remove illicit connections to the storm sewer infrastructure.
- Remove sources of pollutants that contaminate the storm sewer infrastructure through surface water runoff.
- Perfect BMP applications that are efficient and cost effective.
- Continue discharge characterization for parameters with the greatest cost/benefit ratio for the best overall program efficiency.
- Interact with other local governmental agencies in sharing data, etc.
- Incorporate these NPDES permit program requirements in the Comprehensive Stormwater Master Plan to unify the overall stormwater management effort.
- Build a monitoring activity and sample results database for tracking and assessment purposes. Build a GIS map using the database for pollutant trend analysis, etc.
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| B. |
The Comprehensive Monitoring Program |
| The City's comprehensive approach to stormwater monitoring now consists of two elements in addition to the water quality sampling effort - field screening and water quality impact assessment. Each element has its own goal.
- Field Screening will result in a large number of outfalls being investigated or "screened" on an annual basis. Visual and odor detection techniques along with field test kit sample analysis, in most situations, will allow quick assessments to be made on sites needing further investigation. The specifics of this program are given in the Stormwater Management Plan.
- Water Quality Impact Analysis is an ongoing concern of the Dade County Department of Environmental Resources Management. The Department's Planning and Evaluation Section is conducts ground and surface monitoring programs to assess countywide water quality trends and impacts. This Section also undertakes special planning and other studies such as biomonitoring and other in-stream evaluations. The Department's Restoration and Enhancement Section also has responsibilities for related activities. These projects receive funds from grants, Utility Service Fees, and other governmental sources because of their regional nature and the complex interaction of various pollutant sources.
The City of Hialeah also reports relevant field observations to DERM. Computerized databases and mapping are also furnished to DERM. |
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