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control program rests upon the integrity of our principal engineers and geologists. In this regard, our bench of <br />principal professionals has demonstrated unwavering commitment to quality and professional integrity through <br />their long tenure with Leighton. <br />On each project, Leighton employs several layers of quality assurance procedures to ensure adherence to the <br />project's goals, budgets, and schedules, and to maintain the highest quality technical data. Budget status, work <br />progress, and the results of data collected in the field are conveyed in regular communication from Leighton's <br />Project Manager to the City's designated point(s) of contact. Through constant monitoring of project costs, <br />schedule, and results, and through clear communication with the City, Leighton minimizes change orders <br />throughout the duration of each project to its completion. <br />Documents for agency submittal, including their associated tables and figures, undergo a two- to three- tiered <br />internal review, depending on size and complexity. Data tables and figures are initially drafted by junior staff <br />under the guidance of the Project Manager. Once complete, these work products are combined with the report <br />text to form a complete document for review by the Principal in Charge. The QC officer checks both the data <br />points and the broader conclusions of the report prior to submitting a draft report to the City for review. <br />Our quality control approach includes the following steps as illustrated in the accompanying flowchart. <br />• Identification of specified task objectives <br />• Selection of qualified personnel for specified tasks <br />• Compliance with field procedures, as documented in Leighton field procedures manual <br />• Selection and application of systematic data acquisition and analysis techniques <br />• Review of data during the project to conform appropriateness and adequacy of techniques in meeting <br />task objectives <br />• Application of quality control measures during data collection and analysis <br />• Formal project review in which conduct and the work products are critically reviewed and evaluated by <br />senior personnel who have extensive experience and seasoned judgment <br />• Documentation of the Above Terms <br />• Documentation of the above items <br />Leighton QC Manual <br />Data Quality Objectives <br />Sampling Analysis Data Collection W Lab QA/QC <br />Data Validation <br />Technical Review <br />Editorial Review <br />Draft Report <br />