Stormwater BMP Monitoring Protocol
description
Transcript of Stormwater BMP Monitoring Protocol
STORMWATER BMP MONITORING PROTOCOLCoastal Stormwater Supplement Training
Outline
Overview The Need for Coastal BMP
Monitoring Monitoring Protocol
Outline Monitoring Program
Coordination Local Example
Overview Purpose…Assist local governments and
the development community in defining the effectiveness of stormwater management practices used in the coastal plain physiographic region
Stormwater BMP Performance
The National Pollutant Removal Performance Database, Version 2 (Winer, 2000) included 139 individual BMP performance studies published through 2000
A number of BMP performance studies have been published since 2000
27 studies were reviewed and added to the NPRPD* in Sept. 2007
Data not selected for coastal region
Stormwater BMP Performance
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Stormwater BMP Performance Much of the data (~78%) in the updated
NPRPD came from outside of the coastal plain physiographic region.
Where more than a handful of coastal plain studies are available, the data generally shows that the pollutant removal rates provided by coastal BMPs are lower than those provided by BMPs in other physiographic regions.
Data specific to the coastal region
Stormwater BMP Performance
The Need for Coastal Monitoring Protocol
Small number of coastal BMPs found in the database highlights the need for additional BMP performance research (Novotney, 2007)
Approach presented in the monitoring protocol can help…Fill data gaps
Better define the performance of coastal BMPs
Improve the way that coastal BMPs are designed and maintained
Monitoring Protocol
Protocol walks through the process of developing and conducting a monitoring program
Monitoring Protocol
Process/Outline
Monitoring Protocol Outline
Section 1.0: Introduction
Section 2.0: Monitoring Program Development Determining Data Needs Selecting Monitoring
Sites Selecting Monitoring
Parameters Selecting Equipment
Section 3.0: Monitoring Procedures Characterize Site
Conditions Select Monitoring Points Collect Samples Perform Laboratory
Analysis Data Evaluation and
Management
Section 4.0: Budgeting
Monitoring Program Coordination NPDES Phase I & II MS4 Permits
Post Construction Runoff Control Inspection & Maintenance
E&S Control Inspections NPDES Industrial General Permit
303 (d) listed waterway sampling Quarterly water quality monitoring
TMDL Implementation Plans SWMP Implementation Effectiveness (Phase
I, TMDL, etc.)
Bluffton, SC Example
Required by the Town Stormwater Management Ordinance
Construction May require continuous Turbidity monitoring Town visual inspections of sites minimum of
twice per month Engineer monthly reporting of weekly
inspection/corrections Post Construction
36 months of sampling of pollutant loads Report findings to Town Failure to meet pre-development loadings will
require corrective action Maintenance/operation plan Town has right to inspect/monitor
Bluffton, SC Example
Required by the Town Stormwater Management Ordinance
Existing developments Town has the right to sample
discharges May be required to monitor if
high levels of pollutants are identified in discharge
Corrective actions can be required