SOURCE WATER ASSESSMENT FOR CACHE LA POUDRE WATERSHED - RECOMMENDATIONS FOR REFINING SOURCE WATER ASSESSMENT

An EPA National Pilot

General
Delineation
Contaminant Inventory
Susceptibility Analysis

Develop an assessment of local stakeholders' needs related to source water information that is comprehensive, in-depth, and thorough. The Project accommodated the potential needs of local stakeholders as well as it could within the parameters constraining it, and CoSWAP and budget in particular. Regardless, as the Project progressed, it seemed more apparent that the products, if completed, would meet needs related to public presentation well, but not meet those related to site-specific management of resources and PSOCs. It remains to be determined if the ideal CoSWAP requirements, if fulfilled, meet these local needs.

Develop SWA for the entire SWAA delineated. This includes the SWAA area contributing to the City of Greeley intake, i.e., the CLP North Fork and Hansen Canal - CBT.

Develop the source water assessment and maps at a larger scale (e.g., 1:24,000 or larger). All maps for the entire SWAA would need to be developed at a larger scale and achieve the appropriate accuracy standard to achieve requirements of the CoSWAP susceptibility analysis method that evolved ultimately. However, of particular concern, are the areas shown to have a high concentration of point source PSOCs present. These are primarily areas along the CLP mainstem/Colorado Highway 14, Glacier View Meadows, Pingree Park, area nearly surrounded by the Comanche Peak Wilderness, and Rist Canyon Road/Stove Prairie area in the southeastern portion of the SWAA.

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Develop maps at larger scale, and the hydrology layer specifically, to comply with CoSWAP susceptibility analysis requirements, and sensitivity requirements specifically.

Add an overlay for the location of public water system source wells.

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Continue developing the contaminant inventory based on additional data sources. The Project was not able to develop data for all features and PSOCs, or coverages for all areas within the PSOC even where it did develop data for a particular feature or PSOC for most of the SWAA. The Project was not able to identify and review all available data sources, electronic or 'paper', public or private.

Conduct field site inspection to verify or correct data developed from readily accessible and useable electronic. Notable is the need to verify if particular PSOCs near SWAA boundaries are in fact located within the SWASS, and the need to verify if particular PSOCs near the 'near/far' boundary are rated accurately in the 'sensitivity' exercise.

Conduct field survey and/or interview facility owners or managers to develop the facility specific data the CoSWAP method requires. Examples that seem particularly important are owners or managers of relatively large tracts of land, e.g., CSU regarding facilities and PSOC on its Pingree Park campus; ARNF regarding application and storage of agricultural chemicals, vehicle and equipment storage, storage tanks, etc. To achieve the ideal CoSWAP requirements, eventually every owner or manager of every PSOC will need to be interviewed.

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Revise the susceptibility analysis as better data is developed.

Automate the susceptibility analysis methodology to ensure consistency for all PSOCs within the SWAA, and with SWAs throughout Colorado.

Proceed to Technical Working Notes and Recommendations.

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