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Phelan Development Holly Master Plan - Buildings H & 1 15188.000.006 Geotechnical Exploration TABLE 2.2.1-1: Active Faults Capable of Producing Significant Ground Shaking at the Site DISTANCE DIRECTION MAXIMUM FAULT NAME FROM • FROM SITE (MILES) MAGNITUDE Great Valley 6 Southwest 6.9 Greenville Connected 15 West 7.0 Mount Diablo Thrust 22 West 6.7 Calaveras 28 West 7.0 Hayward-Rodgers Creek 32 West 7.3 North San Andreas 51 West 8.0 2.3 SURFACE CONDITIONS Site topography was observed to be relatively flat and varies from approximately elevation 18 to 20 feet (NAVD 88) according to topographic information provided by Siegfried via email on August 3, 2021. At the time of our field exploration, we observed the following site features. • Rails related to train cars crossing through the EXHIBIT 2.3-1: Open Pit in Southeastern center of the site, running north-south Portion of Site Parked vehicles including semi-trucks • Scattered debris along eastern fenced perimeter of site. • Aggregate base AB and decomposed asphalt are 3� typical surface materials encountered throughout ' the site • An open pit was observed in the southeastern portion of the site, revealing a pipe running north- south into the site. Static water was observed in the , pit. The pit is shown in Exhibit 2.3-1. Please refer to the Site Plan (Figure 2) and the f411W � . Suggested Demolition Plan (Figure 4), for more information on site features. " 2 ^ SUBSURFACE CONDITIONS j1e In the western portion of the site in the vicinity of Building H, we encountered a thin (approximately 1-foot) layer of undocumented fill consisting primarily of AB and clayey sand, underlain by shallow native soil consisting of fat to lean clay with varying sand content. Underlying these materials, we encountered medium dense to dense sand interbedded with clay and gravels to the total depth explored. In the eastern portion of the site in the vicinity of Building I, we encountered undocumented fill consisting of concrete debris, spent lime, and elastic silt remnant from the historical site use overlaying native fat to lean clay with sand interbedded with silt and variable sand content. Exhibits 2.4-1 and 2.4-2 present examples of materials encountered within the test pit explorations. Depth to native soil in the eastern portion of the site varied from approximately 5 feet -c1VGE0 uecem Der 13, 2021 Expect Excellence—