APPENDIX A Shade/Shadow Study SHADE/SHADOW STUDY for San Gabriel Plaza San Gabriel, California Consultant: Michael Baker International 5 Hutton Centre Drive, Suite 500 Santa Ana, California 92707 Contact: Ms. Kristen Bogue Technical Studies Project Manager 949.855.5747 October 18, 2017 JN 160392 San Gabriel Plaza TABLE OF CONTENTS EXECUTIVE SUMMARY ........................................................................................................................ 1 1.0 PURPOSE OF THE STUDY ........................................................................................................ 5 1.1 Project Location ................................................................................................................... 5 1.2 Project Description .............................................................................................................. 5 2.0 METHODOLOGY ...................................................................................................................... 11 3.0 EXISTING CONDITIONS ....................................................................................................... 13 3.1 Climate ................................................................................................................................ 13 3.2 Existing Shadow‐Sensitive Uses ..................................................................................... 14 3.3 Existing Shade/Shadow Conditions ............................................................................... 14 4.0 SHADE/SHADOW ANALYSIS .............................................................................................. 15 4.1 Thresholds of Significance ............................................................................................... 15 4.2 Impacts and Mitigation Measures .................................................................................. 15 5.0 REFERENCES ........................................................................................................................... 25 5.1 Preparers ............................................................................................................................. 25 5.2 Documents ......................................................................................................................... 25 5.3 Web Sites ............................................................................................................................ 25 Shade/Shadow Study i October 2017 San Gabriel Plaza LIST OF EXHIBITS Exhibit 1 – Regional Vicinity .................................................................................................................... 6 Exhibit 2 – Site Vicinity ............................................................................................................................. 7 Exhibit 3a – Project Site Plan .................................................................................................................... 8 Exhibit 3b – Phase 3 Conceptual Design ............................................................................................... 10 Exhibit 4a – Proposed Project Shade/Shadow Patterns Winter Solstice and Vernal Equinox ...... 17 Exhibit 4b – Phase 3 Shade/Shadow Patterns, Winter Solstice and Vernal Equinox ...................... 18 Exhibit 5a – Proposed Project Shade/Shadow Patterns Summer Solstice and Autumnal Equinox ....................................................................... 21 Exhibit 5b – Phase 3 Shade/Shadow Patterns, Summer Solstice and Autumnal Equinox ............ 22 Shade/Shadow Study ii October 2017 San Gabriel Plaza EXECUTIVE SUMMARY The purpose of this Shade/Shadow Study (Study) is to describe the existing sunlight exposure and shade/shadow conditions at the proposed San Gabriel Plaza Project (“project”) site and in the immediate vicinity, as well as analyzing the introduction of new sources of shade/shadow associated with the proposed project. The proposed project is located in the City of San Gabriel on the southeast corner of San Gabriel Boulevard and Live Oak Street, approximately 3.4 miles south of Interstate 210 (I‐210), and 1.9 miles north of Interstate 10 (I‐10). Proposed Project The project site is currently occupied by several commercial and residential buildings. The project proposes to demolish the existing buildings and construct a multi‐story mixed‐use development that includes 163 residential dwelling units, 16,435 square feet of restaurant, and 12,230 square feet of commercial retail uses on the 3.46‐acre project site. The first and second floors house restaurant use, commercial retail, and residential housing units. The third through fifth floors would contain residential uses. Parking for the commercial suites would be located on the subterranean and first floors, and subterranean parking is provided for the residential units. The parking areas for the commercial suites and residential units would be separated by a security fence. The project would have a full access point on Live Oak Street and another full access point on San Gabriel Boulevard via Wedgewood Avenue. The ground level and subterranean parking lot for the retail uses would have two driveways: one full access driveway on Live Oak Street located approximately 250 feet east of San Gabriel Boulevard; and another full access driveway on Wedgewood Avenue via the north leg of the intersection of Winchester Place and Wedgewood Avenue. The full access driveway to the subterranean parking for the residential units would be located on Wedgewood Avenue and accessed via the east leg of the intersection of Winchester Place and Wedgewood Avenue. Phase 3 Parcel Acquisition A variation of the proposed project would include the acquisition and development of the residential property located at 818 East Live Oak Street (Assessor’s Parcel Number [APN] 5373‐ 001‐008). This Shade/Shadow Study includes an analysis of shade/shadow impacts associated with Phase 3, as well as the proposed project. The proposed project would result in new shadows cast onto surrounding residential and commercial uses, as well as onto adjacent roadways and sidewalks. As discussed in Section 4.1, Thresholds of Significance, a significant impact would result if shadow‐sensitive use areas (where sunlight is important to its function) would be shaded by project‐related structures for more than three hours between the hours of 9:00 a.m. and 3:00 p.m. Pacific Standard Time (between Shade/Shadow Study 1 October 2017 San Gabriel Plaza late October and early April), or for more than four hours between the hours of 9:00 a.m. and 5:00 p.m. Pacific Daylight Time (between early April and late October), compared to the existing conditions. The following is a summary of the findings made as a result of this analysis. Early April to Late October Summer Months Proposed Project The proposed project would not cast shadows for more than four hours between 9:00 a.m. and 5:00 p.m. at any shadow sensitive uses in the project vicinity. Thus, during the summer months, surrounding uses would not experience significant shadow impacts as a result of the proposed project. Phase 3 Parcel Acquisition Shade/Shadow patterns as a result of Phase 3 would be similar to the proposed project, although to a slightly greater degree. However, no shadow‐sensitive uses would be shaded for more than four hours between 9:00 a.m. and 5:00 p.m. during the Summer Solstice under Phase 3. Fall Months Proposed Project The proposed project would not cast shadows for more than four hours between 9:00 a.m. and 5:00 p.m. at any shadow sensitive uses in the project vicinity. Thus, during the fall months, surrounding uses would not experience significant shadow impacts as a result of the proposed project. Phase 3 Parcel Acquisition Shade/shadow patterns as a result of Phase 3 would be similar to the proposed project, although to a slightly greater degree. However, no shadow‐sensitive uses would be shaded for more than four hours between 9:00 a.m. and 5:00 p.m. during the fall months with implementation of Phase 3. Shade/Shadow Study 2 October 2017 San Gabriel Plaza Late October to Early April Winter Months Proposed Project The proposed project would shade the residential backyard area at 818 East Live Oak Street to the north of the project site for more than three hours between 9:00 a.m. and 3:00 p.m. with project implementation. However, this area is currently shaded throughout the day under existing conditions. Therefore, the project would not create a substantial increase in shade/shadow patterns in comparison to existing conditions. Impacts in this regard would be less than significant. Phase 3 Parcel Acquisition Overall shade/shadow patterns as a result of Phase 3 would be similar to the proposed project, although to a slightly greater degree. However, as the residence at 818 East Live Oak Street would be acquired and developed as part of the project, no shade/shadow impacts would occur at this shadow‐sensitive use. Therefore, a less than significant impact would occur during the winter months with implementation of Phase 3. Spring Months Proposed Project The proposed project would shade a small portion of the residential backyard area at 818 East Live Oak Street to the north of the project site for more than three hours between 9:00 a.m. and 3:00 p.m. with project implementation. However, this area is currently shaded throughout the day under existing conditions. Therefore, the project would not create a substantial increase in shade/shadow patterns in comparison