14 ATTACHMENT 6 - Appendix A - E

City of Pleasanton–Spotorno Ranch Reduced Development Project Initial Study/Consistency Checklist Environmental Checklist FirstCarbon Solutions 87 https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480021/Consistency Checklist/21480021 Spotorno Ranch Consistency Checklist ScreenCheck.docx impacts to this resource. Additionally, the 1998 HVSP FEIR determined that prehistoric cultural sites, features, or objects could be inadvertently discovered during project implementation. The 1998 HVSP FEIR indicated that MM K2 would require a qualified Archaeologist to make recommendations in the case that previously “undiscovered prehistoric resources” were discovered. The 1998 HVSP FEIR concluded that implementation of MM K2 would reduce impacts on previously undiscovered cultural resources to less than significant. An initial archaeological reconnaissance of the Spotorno property was conducted as part of the 1998 HVSP FEIR. A general surface reconnaissance was conducted by two Archaeologists and covered the approximately 31 acre Spotorno Flat Area, where proposed development would occur for the current Spotorno Ranch project. The survey covered north/south transects approximately 15 to 20 meters apart. The recently plowed flatter fields afforded good to poor surface visibility; however, the area east of the flatter areas offered very poor to nonexistent surface visibility due to very thick annual grasses and other vegetation. No evidence of prehistoric cultural use or archaeological resources was found on the Spotorno Property project area by surface survey, nor are any recorded on this previously surveyed parcel. On March 7, 2018, FCS Senior Archaeologist, Dana DePietro, conducted an updated pedestrian survey for unrecorded cultural resources. The survey began in the southwest corner of the project site and moved east, using north–south transects spaced at 15-meter intervals whenever possible. As noted in the previous survey, the project area has been subject to disking and other ground disturbance associated with agricultural activity at the site. Soil visibility was relatively poor across the site, ranging from 15 to 30 percent, due to grasses and ground cover. Soils in sections of poor visibility were intermittently inspected using a hand trowel. Observed soils were largely composed of dark brown silty soil with high clay content, interspersed with small (2 to 3-centimeter) stones primarily composed of quartz, schist, and basalt. Soils in the west of the project area were noticeably darker in color; however, upon close inspection at multiple locations, did not contain artifacts or materials consistent with midden soils. Survey conditions were documented using digital photographs and field notes. During the survey, the FCS Archaeologist examined all areas of the exposed ground surface for prehistoric artifacts (e.g., fire-affected rock, milling tools, flaked stone tools, tool-making debris, ceramics), soil discoloration and depressions that might indicate the presence of a cultural midden, faunal and human osteological remains, and features indicative of the former presence of structures or buildings (e.g., postholes, standing exterior walls, foundations) or historic debris (e.g., glass, metal, ceramics). Particular attention was paid to the southeast of the project area, as it is the closest the creek running parallel to Happy Valley Road. Water and natural resources are traditionally considered to have higher potential for cultural sensitivity as they were attractive locations for prehistoric human settlement, such as CA-ALA-24. All areas of proposed development were closely inspected for culturally modified soils or other indicators of potential historic or prehistoric resources. No historic or prehistoric cultural resources or raw materials commonly used in the manufacture of tools (e.g., obsidian, Franciscan chert) were found in these areas. The February 15, 2018, record search results from the NWIC confirmed the presence of prehistoric archaeological resource CA-ALA-24 within 0.5 mile of the project site. The resource is recorded as