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HELIX Environmental Planning, Inc. 7578 El Cajon Boulevard La Mesa, CA 91942 619.462.1515 tel 619.462.0552 fax www.helixepi.com September 8, 2016 Mr. Jon Corn Grandview Community Homes, LLC 160 Chesterfield Drive, Suite 201 Cardiff, CA 92007 Subject: Biological Resources Addendum for the Grandview Pointe Project Dear Mr. Corn: At the request of Grandview Community Homes, LLC, HELIX Environmental Planning, Inc. (HELIX) has prepared this letter report to serve as an addendum to the April 2015 biological technical report (DUDEK 2015) for the Grandview Pointe Project (project) located in the City of Oceanside, San Diego County, California. The project generally consists of a 30-lot residential community. Subsequent to preparation of the April 2015 report, minor modifications have occurred to the project design and corresponding impact footprint. Additionally, new project components are currently proposed that were not addressed in the April 2015 report. The previous project in combination with the project modifications and new components are collectively referred to herein as the project and are the subject of this report. This addendum report documents the existing biological conditions within the project boundary, including the new component areas, and provides a focused analysis of potential impacts to sensitive biological resources with respect to local, state, and federal policy. This report provides the biological resources technical documentation necessary for review under the California Environmental Quality Act (CEQA) by the City of Oceanside (City) and other responsible agencies for the project. INTRODUCTION Project Location The proposed project site is located in the City of Oceanside (City) in northern San Diego County, California (Figure 1). Specifically, the site is located on Grandview Street, approximately 0.5 mile east of Interstate 5, just south of Oceanside Boulevard (Figures 2 and 3). Two single-family homes are on site within the southern area of the project site, additional residential development surrounds the site to the south, west, and east, and commercial development is to the north and northwest. Letter to Mr. Jon Corn Page 2 of 13 September 8, 2016 The site lies within the U.S. Geological Survey (USGS) 7.5-minute map, San Luis Rey Quadrangle: Section 25, Township 11 South, Range 5 West, assessor’s parcel number 151-310- 38. Project Description The project proposes the subdivision of an existing parcel into 30 lots and the construction of 25 new single-family homes, a duplex with two attached homes, a private street, utilities improvements, and preservation of open space. The applicant has elected to utilize provisions under the State Density Bonus Law (Government Code 65915) and the City’s Density Bonus Ordinance (Zoning Ordinance Section 3032). Revisions to the project design have occurred as the project has progressed through the design process and as a result, the overall grading footprint has changed since the April 2015 report. New project components are also currently being proposed that were not addressed in the April 2015 report. These new components include: (1) the addition of an on-site detention basin and storm drain outfall in the northern portion of the site; (2) the addition of an off-site water and sewer line connection to Union Plaza Court to the north installed via a trenchless construction method; and (3) slope remediation areas in the northern portion of the site. The current grading footprint and these new components, in addition to the other project components, are the subject of this report. METHODS Literature Review Prior to conducting biological field surveys, HELIX reviewed the April 2015 report (DUDEK 2015) and conducted an updated search of the California Natural Diversity Database (CNDDB; California Department of Fish and Wildlife [CDFW] 2016a-c) for information regarding sensitive species known to occur within one mile of the project site, as well as a review of U.S. Fish and Wildlife (USFWS) and California Native Plant Society (CNPS) Inventory of Rare and Endangered Plants. No additional sensitive species were noted. General Biological Survey A general biological survey for the proposed project was conducted by HELIX biologist Summer Schlageter on August 24, 2016. Previous vegetation mapping of the project site that was conducted for the April 2015 report was used as a basis and verified during the general survey. Vegetation in off-site areas was mapped on a 1"=100' scale aerial photograph. The project site was surveyed on foot and with the aid of binoculars. Plant and animal species observed or otherwise detected during the survey were recorded (Attachments A and B). Animal identifications were made in the field by direct, visual observation, or indirectly by detection of calls, burrows, tracks, or scat. Plant identifications were made in the field or in the lab through comparison with voucher specimens or photographs. Letter to Mr. Jon Corn Page 3 of 13 September 8, 2016 Survey Limitations Noted animal species were identified by direct observation, vocalizations, or the observance of scat, tracks, or other signs. However, the lists of species identified are not necessarily comprehensive accounts of all species that utilize the project site as species that are nocturnal, secretive, or seasonally restricted may not have been observed. Nomenclature Nomenclature for this report is from Baldwin et al. (2012), and the CNPS (2016) for plants; Holland (1986) and Oberbauer (2008) for vegetation communities; Collins and Taggart (2006) for reptiles and amphibians; American Ornithologists’ Union (2014) for birds; and Baker et al. (2003) for mammals. Sensitive plant species status is taken from CNPS (2016). Sensitive animal species status is taken from CDFW’s CNDDB (2016a-c). Soils information was taken from the Natural Resources Conservation Service (NRCS; 2015). EXISTING CONDITIONS SUMMARY Regional Context The site and off-site improvement areas are located within a relatively urbanized area. There are no large habitat blocks or large open space areas in the site vicinity. General Land Uses The project site is undeveloped, with the exception of two single-family homes and associated outbuildings. General land uses include residential development to the south, west, and east, and commercial development to the north and northwest. The off-site improvement areas are developed with paved roadway within Union Plaza Court. Disturbance The project site and immediate vicinity contain evidence of previous and ongoing human-related disturbances. Notable disturbances include graded pads, brow ditches, and fencing. Topography and Soils Elevations on the project site range from approximately 60 feet above mean sea level (amsl) to 155 feet amsl. Three soil types have been mapped within the project site: Las Flores loamy fine sand, 15 to 30 percent slopes, eroded; Las Flores-urban land complex, 9 to 30 percent slopes; and Tujunga sand, 0 to 5 percent slopes (NRCS 2016). Letter to Mr. Jon Corn Page 4 of 13 September 8, 2016 Vegetation Communities/Habitat Types Six vegetation communities/habitat types occur in the project site, as presented in Table 1 and shown on Figure 4. All vegetation communities found to occur on the site are upland habitat types; no wetland habitat types occur. Vegetation community/habitat type names are from the Holland classification system (Holland 1986) and amendments by Oberbauer (2008). The communities/habitat types are presented in Table 1. The off-site improvement areas consist entirely of developed land. Table 1 VEGETATION COMMUNITY/HABITAT TYPE Project Site Vegetation Community/Habitat Type (acres)* Developed 0.5 Diegan Coastal Sage Scrub 1.2 Disturbed Habitat 1.5 Eucalyptus Woodland 2.4 Non-native Grassland Broadleaf-dominated 0.9 Non-native Woodland 0.6 TOTAL 7.1 *Acreages rounded to the nearest tenth acre Flora HELIX identified a total of 24 plant species in the survey area, of which 12 (50 percent) are non-native species (Attachment A). Fauna A total of 9 animal species were observed or otherwise detected in the survey area during the biological survey, including 8 bird species, and 1 mammal species (Attachment B). SENSITIVE BIOLOGICAL RESOURCES Sensitive Vegetation Communities/Habitat Types Sensitive vegetation communities/habitat types are defined as land that supports unique vegetation communities or the habitats of rare or endangered species or subspecies of animals or plants as defined by Section 15380 of the State CEQA Guidelines. Two sensitive vegetation communities occur within the project site: Diegan coastal sage scrub and non-native grassland broadleaf-dominated (Table 1). No sensitive habitat types occur within the off-site improvement areas. Letter to Mr. Jon Corn Page 5 of 13 September 8, 2016 Nesting Birds The project site supports trees and shrubs that provide suitable nesting habitat for several common (non-sensitive) bird species known to the region and protected under the federal Migratory Bird Treaty Act (MBTA) and California Fish and Game Code (CFG Code). The off-site improvement areas do not support vegetation suitable for nesting habitat. Raptor Foraging A red-shouldered hawk was observed foraging over the canyon to the northeast of the project site, however, the project site itself does not provide raptor foraging habitat due to its developed nature, small size, overall poor quality habitat, and proximity to regular human activity. The off-site improvement areas are developed and do not support raptor foraging habitat. Jurisdictional Waters and Wetlands The project site is characterized entirely by uplands that lack evidence of potential jurisdictional waters and wetlands. No potential wetland conditions were observed in the project site or off-site improvement areas. No drainage features occur in the project site or off-site improvement areas. No riparian habitat occurs in the project site or off-site improvement areas. Therefore, there are no resources subject to the regulatory jurisdiction of the U.S. Army Corps of Engineers (USACE), Regional Water Quality Control Board (RWQCB), and CDFW on the project site or off-site improvement areas.