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City of Santa Ana, CA I SEWER RATE STUDY <br />Table B - 3: Summary of CoF Criteria used in this Study <br />CoF Criteria <br />Weight <br />Comment <br />Strategy / Assumption <br />Pipe Diameter <br />42% <br />Assigns grade based <br />2 36" (10) 2 12" (4) <br />on diameter range <br />> 24„ (8) 21" (2) <br />218" (6) Unknown (4) <br />Customer Impacts <br />42% <br />Assigns grade based <br />0-99(0) 300 - 399 (6) <br />(lateral counts of 0- <br />on Cumulative sum <br />101 400 -499 (8) <br />36,994) <br />of upstream laterals <br />200-299(4) 500& above (10) <br />Unknown: (6) <br />Proximity to a <br />16% <br />Assigns grade based <br />Increased risk due to possible environmental and inconvenience to <br />critical location for <br />on count of sites <br />nearby critical customers. <br />school, hospital, and <br />within 300' <br />CoF of 10: Two critical customers within 300 feet of pipeline. <br />government (values <br />of 0 -2) <br />CoF of 5: One critical customer within 300 feet of pipeline. <br />CoF of 0: No critical customers within 300 feet of pipeline. <br />Total (sum of above) <br />100% <br />The resulting CoF <br />scores are 0 to 10. <br />By applying the weighting described above (42% Diameter, 42% Upstream Laterals, 16% Critical <br />Locations) to each of the 8,706 active main pipeline segments in the Santa Ana Sewer System, a 1 to 10 <br />CoF Score was calculated for each, with the distribution shown in Figure B 27. Figure B 28 provides a <br />map of sewer mains color coded by total CoF score. <br />Figure B- 27: Distribution of Sewer Pipeline CoF Scores <br />BLACK & VEATCH I Appendix B. Sewer CIP Prioritization Process <br />65B -260 <br />