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1/11/2001 Project Conditions (Scenario 2) analysis utilizes the "Existing + Approved + Project" peak hour traffic volumes indicated on FEIR Figure 4.6-3. The "Existing plus Approved plus Project" (Scenario 3) analysis then superimposes the proposed quarry generated traffic over Existing plus Approved Project traffic volumes analyzed in Scenario 2. The Year 2010 Base analysis (Scenario 4) corresponds to the "Year 2010 + Project" traffic volumes indicated on FEIR Figure 4.6-5, which includes a background traffic growth over existing conditions plus Oakwood Lake residential subdivision build-out. The Year 2010 Base plus Project (Scenario 5) analysis superimposes the proposed quarry generated traffic over Year 2010 Base traffic volumes analyzed in Scenario 4. PROJECT TRIP GENERATION It is expected that, at full operations, the mining activity on the proposed quarry site would off-haul up to 100 truckloads of sand/aggregate shipment per day. This translates to approximately 100 outbound loaded trucks and 100 inbound returning empty trucks, or a total of 200 truck trip ends on a daily basis. As part of the S.R.132/Bird Road Interchange PSR study (approved in 1998), OMNI-MEANS had analyzed truck peak season loading frequency data for four approved/potential aggregate sites located in San Joaquin County, namely Teichert's Lone Tree quarry, Brown Sand and Gravel quarry, DSS Engineers' Koster Road quarry and the potential Lonestar quarry. Based upon the same, it is estimated that 6.2% of the daily truck trips would occur between 6:00 AM and 7:00 AM, 8.9% between 7:00 AM and 8:00 AM, 1.7% between 4:00 PM and 5:00 PM and 0.1% between 5:00 PM and 6:00 PM. Utilizing 8.9% as the estimate for the AM peak hour and 1.7% as the estimate for the PM peak hour, approximately 18 truck trip ends in the AM peak hour and 4 trip ends in the PM peak hour are estimated. Assuming that the empty trucks would arrive, load up and leave the quarry site all within one hour, a 50%-50% in-out peak hour split for the truck trips is estimated. This corresponds to 9 inbound and 9 outbound AM peak hour truck trips and 2 inbound and 2 outbound truck trips during the PM peak hour. Up to five (5) employees have been assumed to be working on-site, which would yield an additional 5 inbound auto trips in the AM peak hour and 5 outbound auto trips in the PM peak hour. -- PROJECT TRIP DISTRIBUTION AND ASSIGNMENT The truck trips generated by the project site would be exclusively oriented towards S.R.120. Approximately 50% of the truck trips are expected to originate from and depart towards the west on S.R.120, oriented towards City of Tracy and West Stockton via the Interstate 5 corridor. The remaining 50% would originate from and depart towards the east on S.R.120, oriented towards City of Manteca, ._ East Stockton and other near-by population centers located along S.R.99 corridor. All project traffic would utilize the S.R.120/Yosemite Avenue interchange to gain access to and from the site. It is possible that some project traffic (potentially up to 10%) would utilize Yosemite Avenue for travel ._ from/to the City of Manteca. However, this is projected to cause negligible change in traffic impacts at the study intersections shown in this report. SPECIAL FACTORS/ADJUSTMENTS Special factors referred to as "Passenger Car Equivalents" (PCE's) have been utilized so that truck flow characteristics can be modeled conservatively. A PCE is defined as the number of passenger cars that can be used in lieu of a truck (or other non-automobile type vehicles) for purposes of traffic operations