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a <br />City of Santo Ana <br />Pavement Management Program 2018 <br />Quality Control Plan <br />2.2. Accuracy Required For Data Collection <br />The accuracy required for data collection has two components, both of which are further <br />described in the following paragraphs. <br />• Re -inspections <br />• PCI comparisons with past inspections <br />2.2.1 Re -Inspection "Check" <br />At least five percent of all inspections are randomly re -inspected by other team members. <br />A different inspector will review these sites and determine the revised pavement distress <br />measurements. If the initial inspection is determined to be inaccurate, the original inspector <br />is given refresher training before being allowed to continue with any further inspections. <br />Should the data be inaccurate for a certain day, all the data for that day will be re -inspected <br />following refresher training to ensure accuracy. <br />Acceptability Criteria <br />At the time of re -inspection, the actual distresses will be re -inspected and verified, and any <br />corrections made, if necessary. Distress types and severities must be the same and re- <br />measured quantities within ±10% of the original measured quantity. <br />If corrections are required on more than 10% of the re -inspected sample units, then an <br />additional 5% will be re -inspected. This will continue until all more than 95% of the re- <br />inspected sections meet the acceptability criteria. <br />2.2.2 PCI Comparison with Past Inspections <br />As another level of quality control, the new PCIS are compared with the previous PCIS. If <br />they differ by more than ±10 PCI points, these sections are automatically flagged for further <br />investigation. <br />If PCI Increases 10 points: <br />The section is investigated to see if a maintenance and rehabilitation event has occurred <br />since the last inspection, but which has not been recorded. This can only be resolved with <br />feedback from the City. Typically, it may include activities such as: <br />• Crack sealing activities - changes medium or high severity cracking to low severity <br />• Patching activities - alligator cracking that has been removed and patched, so that <br />the resultant PCI is increased. <br />• Surface seals <br />• Overlay <br />3 <br />Engineering & Environmental Services <br />55B-132 <br />