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2. Data Summary <br />The source defect analysis results are summarized in Table IV-3 and Figure IV-l. <br />Table IV-3 - Rehabilitation Occurrence 5ummarv <br />The 7,137 I/I and structural defects account for a total of more than $8,000,000 in <br />rehabilitation costs (Table IV-3, page IV-10). This cost does not include <br />engineering, maintenance, or contingency costs. <br />Figure IV-1 - Breakdown of Defects <br />Figure IV-1, page IV-13 presents the cost breakdown between public defects <br />(manhole, mainline and municipal service line) and private service line defects for <br />the system. The top chart represents the number of occurrences divided into <br />manhole, mainline, municipal service line, and private service line defects. The <br />second represents the costs associated with these categories. As can be seen from <br />the graphs, roughly 61% (4,321 defects) of the total occurrences (7,137 defects) <br />are located in manholes, and the total cost to repair these defects represents <br />approximately 43% of the total rehabilitation costs. The mainline defects <br />comprise 28% (2,029 defects) of the total with a cost greater than $4,400,000 to <br />repair, and the total cost to repair these defects represents around 53% of the total <br />rehabilitation costs. <br />ADS Environmental Services, Inc. <br />IV-4 <br />