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February 10, 1012 Page 5 Data CollectiorVExisting Traffic Conditions The original traffic impact analysis prepared for the Warner Avenue project included the analysis of existing traffic conditions without the project for the year 2009. All traffic counts at the 15 study intersections collected by 101 Group were conducted in 2009 as well. As part of the traffic study update, 101 will revise the analysis to reflect a 2012 existing year, consistent with the anticipated release date of the Notice of Preparation for the environmental document. The City of Santa Ana has directed 101 to use the 2009 traffic counts in the updated traffic analysis to avoid conducting new traffic counts. Two methods were discussed: applying a default growth factor of one percent annually to 2009 counts to estimate Year 2012 conditions, or conducting a few spot check traffic counts to confirm that 2009 counts are the same as 2012 or to identify an annual growth factor. This update requires the following new work elements that were not in the original scope of work • Update Existing No Project Analysis — Pending direction from the City of Santa Ana, the existing no project analysis will be updated to reflect Year 2012 conditions. • Incorporate Existing Plus Project Analysis —The recent Sunnyvale court case highlighted the requirement that traffic studies prepared in support of CEQA documents must include an analysis of Existing Plus Project conditions.' This analysis was not included in the April 2010 TIA and will be added to the report as part of this update. Future Conditions The April 2010 TIA included the analysis of No Project and With Project conditions for a 2020 opening year and 2035 buildout year. With the change in the Existing Conditions year from 2009 to 2012, the analysis results for the Year 2020 and 2035 conditions will need to be updated. Future traffic volumes were obtained by applying annual traffic volume growth forecasts to existing traffic counts using forecasts produced by OCTA with the Orange County Transportation Analysis Model (OCFAM). We do not anticipate the need to obtain new OCTANT forecasts from OCTA. However, the Year 2020 and 2035 traffic volume forecasts must be updated with a baseline of the 2012 existing traffic counts to ensure consistency between analysis years in the report. Documentation 101 Group will update and revise the TIA report to reflect the analysis updates and additional analysis scenarios highlighted in the above tasks. A new report will be prepared and delivered for incorporation into the environmental document prepared for the project. Revisions to other subconsultant documents are not anticipated at this time- - VA Consulting: Utility Relocations — Cogstone: Archaeological Assessment — Urbana: Historical Resource Survey Report — Geologic Associates: Geotech Study — California Property Specialists, Inc.: Relocation Impact Statement — Draft [City consultant] ' On December 16, 2010, the Sixth District of the California Court of Appeal issued its decision in Sunnyvale West Neighborhood Association v. City of Sunnyvafe, Invalidating an environmental impact report (EIR) for a major roadway extension project http/ (hnduselawjmhMcovV2(Z71/0r,&Qurt decijpn5harlgSS _cegale1aterl_S[aifi, impart- analvses.him[