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<br />123S <br /> <br />Smoke test documentation for cross-connections will identify which inlet <br />was smoking on a sketch showing nearby sanitary lines and known storm <br />lines. The method of disconnection and extent of street repairs, <br />however, will not be determined. <br /> <br />Data will be summarized on computer coded field forms and input into a <br />database for storage, sorting and retrieval. It is estimated that <br />20,000 feet of sewer will be smoked tested. <br /> <br />6. Dyed Water Test. Selective dyed water testing in the public sector <br />will be performed to more accurately locate and quantify sources which <br />were identified during smoke testing or which are suspect. Dye water <br />testing is performed by flooding the test section or area with dyed <br />water and observing the sanitary sewer for the presence of dye. The <br />presence of dye indicates a positive test and the location of dye entry <br />is noted. Estimates of leakage rate will be made by direct measurement <br />or by judgement based on the appearance of dye concentration in the <br />sanitary sewer. Dyed water tests will be performed with concurrent <br />television work as necessary to locate and quantify system defects. <br />Television work performed as part of this task will include video tape <br />review, summary, and data entry into project database. <br /> <br />Data will be summarized on computer coded field forms and input into a <br />database for storage, sorting and retrieval. It is estimated that 10 <br />dyed water tests will be performed. <br /> <br />~ <br /> <br />F. I II Source Ana lys is <br /> <br />1. Quantify Sources of 1/1. 1/1 sources identified during field <br />inspection activities will be quantified to reflect peak flows which are <br />estimated for a recurrence I-year storm event. The quantification will <br />be based on a visual observation of each defect and rate assigned during <br />field inspection activities. Inflow sources with defined drainage areas <br />will be quantified using the rational formula. All sources will be <br />reference to a common storm recurrence interval and duration to <br />determine the percent peak flow contrlbution from each source. <br /> <br />2. Prioritize Sources. Each I/I source will be assigned an estimated <br />rehabilitation cost. The ratio of the rehabilitation cost and estimated <br />flow rate will be determined ($/gpd). <br /> <br />Sources will be prioritized by the $/gpd ratio to generate the <br />elimination cost curve for the cost-effectiveness analysis. <br /> <br />3. Compare Source Flows to Monitored Flows. 1/1 source flows <br />estimated from field inspection activities in the OWNER'S system will be <br />compared to total monitored flows. The percent contribution of 1/1 <br />flows in the OWNER'S system by each type of source and overall will be <br />estimated. <br /> <br />G. System Mode 1 ing. <br /> <br />1. Prepare Model. Necessary work to prepare the model for input of <br />flow parameters and system hydraulic analyses will be made. This <br /> <br />06/02/93 <br /> <br />A-12 <br />