Technical Summaiy 



problems must consider both the health-based criteria which are used by 

 DEM in setting water quality standards, and CRMC's ecosystem protection 

 mandate. 



Development of Specific Management Tools 



For the use of local governments and state agencies, it is necessary to 

 develop a simple methodology for conducting a preliminary or initial 

 estimation of the magnitude of the non-point sources of pollution in a 

 watershed and the impacts of those sources on quality of receiving waters. 



The preliminary model would be used in establishing a basis for selecting watersheds in 

 which more detailed management-oriented research would be justified. The proposed 

 methodology would consider storm-generated pollution, and as such would provide 

 estimates of inputs due to CSOs as well as to urban runoff and sedimentation. A number 

 of models of this nature have been prepared and applied with considerable success. 

 Several methodologies (varying in data requirements, detail, and sophistication) have been 

 developed by EPA's Municipal Environmental Research Lab since 1976. 



Illustrated guidebooks should be prepared to be used in planning and zoning, and in 

 designing and maintaining integrated non-point source management and control facilities. 

 Separate handbooks should be prepared for ISDS/wastewater management and for 

 stormwater/sediment management. The handbooks should be designed to provide 

 guidance to town officials regarding pollution parameters and potential 

 flood or health hazards associated with specific development categories, 

 and to provide technical design, construction, and maintenance 

 specifications for offlcials and developers. 



The guidebooks would set out the methodology described above. They would also 

 include a tabulation of potential applicability of specific requirements for different proposed 

 land use developments (including, for example, residential, instimtional, commercial, 

 industrial, open space). The tabulation, and accompanying factors, would be intended to 

 provide applicants as much pre-design specificity and predictability as possible regarding 

 the requirements likely to be imposed. Further, clear guidance would be provided to town 

 officials regarding issues relevant to planning and permit conditioning. 



Monitoring 



Agencies and institutions concerned with Bay quality, and with the 

 impacts of Bay basin land use on resource viability, need to develop a 

 comprehensive environmental monitoring program for the Bay. The 



monitoring program would serve four purposes: assisting researchers and managers in 

 distinguishing between dynamic fluctuations of the estuary and impacts of human activities; 

 facilitating agency decision-making by identifying problem areas and trends; measuring the 

 success of the non-point source and other water quality programs; and providing an on- 

 going record of the ecological status of the Bay. 



In order to devise a monitoring strategy which best (and most cost-effectively) meets 

 these various needs, it is necessary for agencies having monitoring needs to 

 develop a consultative process for the long term, and to reach consensus on 

 an inter-agency monitoring strategy. In addition, concerned agencies and 

 institutions need to devise mechanisms by which water quality monitoring data can be most 



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