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<br /> <br /> <br /> <br />June 27, 2018 <br /> <br />Mike O’Hara <br />Tim Lewis Communities <br />3300 Douglas Blvd. Building 400, <br />Roseville, CA 95661 <br /> <br />SUBJECT: Results of the June 2018 special status plant survey conducted on the Spotorno <br />Ranch project site, located in the City of Pleasanton, Alameda County, <br />California (PN 1656-05). <br /> <br />Dear Mike: <br /> <br />Live Oak Associates, Inc. (LOA) conducted a second focused survey for rare plants within areas <br />proposed for residential development and landslide repair, including a 75-foot buffer, on the <br />approximately Spotorno Ranch project site. The project site is located east of Alisal Street in the <br />City of Pleasanton, Alameda County, California. The survey was conducted by LOA plant and <br />wetland ecologist, Pamela Peterson on June 26, 2018. <br /> <br />Introduction <br /> <br />Based on prior reconnaissance-level surveys conducted on the site by LOA ecologists Pamela <br />Peterson and Katrina Krakow and a review of the California Natural Diversity Database <br />(CNDDB) for preparation of a Biological Evaluation for CEQA, it was determined that the site <br />had the potential to support the larval host plant for the federally-listed Callippe silverspot <br />butterfly, i.e. viola (Viola pedunculata), as well as the potential to support four special status <br />plant species: Congdon’s tarplant (CRPR 1B) (annual species; blooms June-November), big <br />tarplant (CRPR 1B) (annual species; blooms July-October), round-leaved filaree (CRPR 1B) <br />(annual species; blooms March-May), and shining navarretia (CRPR 1B) (annual species; <br />blooms May-July). Prior surveys of the site by Olberding and by LOA in 2014 did find one of <br />these species, Congdon’s tarplant, present on the site in small numbers in the western portion of <br />the site, although surveys completed in the last two to three years have failed to detect this <br />species. There are no CNDDB-documented occurrences of any of the four special status plant <br />species within a three-mile radius of the site. None of the plant species is federally- or state-listed <br />as endangered or threatened, however, but all of these species occur on CNPS List 1B (“Plants <br />Rare, Threatened, or Endangered in California and elsewhere”). Project impacts to any of these <br />species, if present, may be considered potentially significant under CEQA.