Colorado Water Resources & Power Development Authority Jan 2003

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Task 3: Develop Susceptibility Analysis Protocols In this task the Contractor's project team will work with the WQCD to refine the susceptibility protocols presented • in the WQCD's SWAP Program Plan, as needed, and will develop specific criteria for implementing these protocols. Our methods for generating the draft and final versions for these factors are presented in the steps below. Note: Subtasks 3.1, 3.2, and 3.3 are Pre -PDR tasks which have been completed by EnecoTech and accepted by WQCD. Pre -PDR Task 3.1 Evaluate Data Applicability The final design of any susceptibility protocols, vulnerability logic, and default factors for potential sources of contamination ( "PSOC's ") is dependent on the data that will be available for the SWAP evaluations. A detailed inventory of the datasets to determine the applicability of particular attributes of PSOC's and sources will be completed in this task. The Contractor will evaluate which available data fields can be matched to the previously developed data wish list. Task 3.2 — Recommend Improvements to Existing Protocols In a similar effort to that conducted in Task 3.1, this detailed inventory, considering any data that may become available later in the project, will be compared to the data requirements of the WQCD's existing susceptibility protocols. The results of the evaluation will be documented and presented to the WQCD in a memo that addresses the data gaps. Then, based on the data applicability analysis from Task 3.1 and the information received from the WQCD during Tasks 1 and 2, the Contractor will prepare a set of options for recommended modifications to the existing protocols. The document will include text, matrices (including preliminary revisions to the SA Protocol Factors Tree), and flow diagrams to show, for various options, how the setting sensitivity could be determined, what variables should be developed for use in the Toolset, what factors may specifically be considered in determining a PSOC's likelihood of release, contaminant hazard, weighting criteria, volume, etc. The document will include data flow logic to demonstrate how assigned default values will be used when actual raw data are not available. The assigned default values will be developed under Task 5. Due to budgetary constraints and data in numerous formats (e.g., contaminant hazard data in inconsistent formats between databases), only limited raw data from the PSOC databases will be used for the analysis (e.g., compliance status, if known). The, cornerstone for assigned default values will be based on business type as determined from SIC codes. Data that WQCD cannot provide in electronic formats will not be considered. The recommended protocol revisions memo will be provided to the WQCD for review. The Contractor will meet with the WQCD to determine how the Contractor's recommended refinements to the existing protocols will be pursued. For example, the WQCD may wish to give more weight to the most significant susceptibility analysis factors (e.g., a PWS's historical Maximum Contaminant Level ( "MCU) violations, PSOC location, well depth/hydrologic setting sensitivity, etc.) and less weight to some of the other less significant factors (e.g., system integrity). Other options might include expanding the number of possible outcomes in the susceptibility matrices to account for a wider range of possibilities and including the potential volume of contaminants used by each PSOC type. Additional evaluation criteria for non -point sources may be another consideration. Following this meeting the Contractor will update the recommended protocol revisions memo. The WQCD must respond to the Contractor's recommendations prior to proceeding with Task 3.3. Task 3.3 Refine Protocols Based on the WQCD's decisions in Task 3.2, the Contractor will further develop criteria for the susceptibility analysis factors. Meetings will be held with the WQCD to review details during refinement of the protocols. The Contractor will recommend specifically which variables on the wish list will be further developed for use in the SA • protocols. The variables that will be "turned on" and further developed will depend to some degree on the data Second Amendment SA SWAP MOU -final 01116/03 Page 6 of 13