Biological Resources

City of Walnut Creek Shadelands Gateway Specific Plan and The Orchards at Walnut Creek Project Draft EIR

Appendix C: Biological Resources

FirstCarbon Solutions H:\Client (PN‐JN)\3611\36110005\EIR\4 ‐ EIR2\36110005 Sec99‐99 Appendix Dividers.doc City of Walnut Creek Shadelands Gateway Specific Plan and The Orchards at Walnut Creek Project Draft EIR

C.1 ‐ CNDDB Records Search 07.02.2013

FirstCarbon Solutions H:\Client (PN‐JN)\3611\36110005\EIR\4 ‐ EIR2\36110005 Sec99‐99 Appendix Dividers.doc Selected Elements by Scientific Name California Department of Fish and Wildlife California Natural Diversity Database

Rare Plant Rank/CDFW Species Element Code Federal Status State Status Global Rank State Rank SSC or FP Agelaius tricolor ABPBXB0020 None None G2G3 S2 SSC tricolored blackbird Ambystoma californiense AAAAA01180 Threatened Threatened G2G3 S2S3 SSC California tiger salamander Amsinckia lunaris PDBOR01070 None None G2? S2? 1B.2 bent-flowered fiddleneck Anomobryum julaceum NBMUS80010 None None G4G5 S2 2.2 slender silver moss Antrozous pallidus AMACC10010 None None G5 S3 SSC pallid bat Aquila chrysaetos ABNKC22010 None None G5 S3 FP golden eagle Arctostaphylos auriculata PDERI04040 None None G2 S2 1B.3 Mt. Diablo manzanita Arctostaphylos manzanita ssp. laevigata PDERI04273 None None G5T2 S2 1B.2 Contra Costa manzanita Athene cunicularia ABNSB10010 None None G4 S2 SSC burrowing owl Atriplex joaquinana PDCHE041F3 None None G2 S2 1B.2 San Joaquin spearscale Blepharizonia plumosa PDAST1C011 None None G1 S1 1B.1 big tarplant Buteo regalis ABNKC19120 None None G4 S3S4 WL ferruginous hawk California macrophylla PDGER01070 None None G2 S2 1B.1 round-leaved filaree Callophrys mossii bayensis IILEPE2202 Endangered None G4T1 S1 San Bruno elfin butterfly Calochortus pulchellus PMLIL0D160 None None G2 S2 1B.2 Mt. Diablo fairy-lantern Campanula exigua PDCAM020A0 None None G2 S2.2 1B.2 chaparral harebell Centromadia parryi ssp. congdonii PDAST4R0P1 None None G4T2 S2 1B.1 Congdon's tarplant Cordylanthus nidularius PDSCR0J0F0 None Rare G1 S1 1B.1 Mt. Diablo bird's-beak Delphinium californicum ssp. interius PDRAN0B0A2 None None G3T2? S2? 1B.2 Hospital Canyon larkspur Didymodon norrisii NBMUS2C0H0 None None G3G4 S3S4 2.2 Norris' beard moss Dipodomys heermanni berkeleyensis AMAFD03061 None None G3G4T1 S1 Berkeley kangaroo rat

Commercial Version -- Dated July, 2 2013 -- Biogeographic Data Branch Page 1 of 3 Report Printed on Wednesday, July 03, 2013 Information Expires 1/2/2014 Selected Elements by Scientific Name California Department of Fish and Wildlife California Natural Diversity Database

Rare Plant Rank/CDFW Species Element Code Federal Status State Status Global Rank State Rank SSC or FP Efferia antiochi IIDIP07010 None None G1G3 S1S3 Antioch efferian robberfly Emys marmorata ARAAD02030 None None G3G4 S3 SSC western pond turtle Eremophila alpestris actia ABPAT02011 None None G5T3Q S3 WL California horned lark Eriogonum truncatum PDPGN085Z0 None None G2 S2 1B.1 Mt. Diablo buckwheat Falco mexicanus ABNKD06090 None None G5 S3 WL prairie falcon Fritillaria liliacea PMLIL0V0C0 None None G2 S2 1B.2 fragrant fritillary Helianthella castanea PDAST4M020 None None G2 S2 1B.2 Diablo helianthella Helminthoglypta nickliniana bridgesi IMGASC2362 None None G3T1 S1 Bridges' coast range shoulderband Hesperolinon breweri PDLIN01030 None None G2 S2 1B.2 Brewer's western flax Isocoma arguta PDAST57050 None None G1 S1 1B.1 Carquinez goldenbush Juglans hindsii PDJUG02040 None None G1 S1 1B.1 Northern California black walnut Lasiurus cinereus AMACC05030 None None G5 S4? hoary bat Lasthenia conjugens PDAST5L040 Endangered None G1 S1 1B.1 Contra Costa goldfields Madia radiata PDAST650E0 None None G2 S2 1B.1 showy golden madia Malacothamnus hallii PDMAL0Q0F0 None None G2Q S2 1B.2 Hall's bush-mallow Masticophis lateralis euryxanthus ARADB21031 Threatened Threatened G4T2 S2 Alameda whipsnake Monolopia gracilens PDAST6G010 None None G2G3 S2S3 1B.2 woodland woollythreads Navarretia gowenii PDPLM0C120 None None G1 S1 1B.1 Lime Ridge navarretia Navarretia nigelliformis ssp. radians PDPLM0C0J2 None None G4T2 S2 1B.2 shining navarretia Oenothera deltoides ssp. howellii PDONA0C0B4 Endangered Endangered G5T1 S1 1B.1 Antioch Dunes evening-primrose Perognathus inornatus inornatus AMAFD01061 None None G4T2T3 S2S3 San Joaquin pocket mouse

Commercial Version -- Dated July, 2 2013 -- Biogeographic Data Branch Page 2 of 3 Report Printed on Wednesday, July 03, 2013 Information Expires 1/2/2014 Selected Elements by Scientific Name California Department of Fish and Wildlife California Natural Diversity Database

Rare Plant Rank/CDFW Species Element Code Federal Status State Status Global Rank State Rank SSC or FP Phacelia phacelioides PDHYD0C3Q0 None None G1 S1 1B.2 Mt. Diablo phacelia Phrynosoma blainvillii ARACF12100 None None G4G5 S3S4 SSC coast horned lizard Rana draytonii AAABH01022 Threatened None G4T2T3 S2S3 SSC California red-legged frog Sanicula saxatilis PDAPI1Z0H0 None Rare G2 S2 1B.2 rock sanicle Senecio aphanactis PDAST8H060 None None G3? S2 2.2 chaparral ragwort Serpentine Bunchgrass CTT42130CA None None G2 S2.2 Serpentine Bunchgrass Streptanthus albidus ssp. peramoenus PDBRA2G012 None None G2T2 S2.2 1B.2 most beautiful jewel-flower Streptanthus hispidus PDBRA2G0M0 None None G1 S1 1B.3 Mt. Diablo jewel-flower Stuckenia filiformis ssp. alpina PMPOT03091 None None G5T5 S3 2.2 slender-leaved pondweed Taxidea taxus AMAJF04010 None None G5 S4 SSC American badger Triquetrella californica NBMUS7S010 None None G1 S1 1B.2 coastal triquetrella Tropidocarpum capparideum PDBRA2R010 None None G1 S1 1B.1 caper-fruited tropidocarpum Viburnum ellipticum PDCPR07080 None None G5 S2.3 2.3 oval-leaved viburnum Vulpes macrotis mutica AMAJA03041 Endangered Threatened G4T2T3 S2S3 San Joaquin kit fox Record Count: 56

Commercial Version -- Dated July, 2 2013 -- Biogeographic Data Branch Page 3 of 3 Report Printed on Wednesday, July 03, 2013 Information Expires 1/2/2014 City of Walnut Creek Shadelands Gateway Specific Plan and The Orchards at Walnut Creek Project Draft EIR

C.2 ‐ USFWS Records Search 07.03.2013

FirstCarbon Solutions H:\Client (PN‐JN)\3611\36110005\EIR\4 ‐ EIR2\36110005 Sec99‐99 Appendix Dividers.doc 7/3/13 Sacramento Fish & Wildlife Office Species List U.S. Fish & Wildlife Service Sacramento Fish & Wildlife Office Federal Endangered and Threatened Species that Occur in or may be Affected by Projects in the Counties and/or U.S.G.S. 7 1/2 Minute Quads you requested Document Number: 130703105248 Database Last Updated: September 18, 2011

Quad Lists Listed Species Invertebrates Branchinecta longiantenna longhorn fairy shrimp (E) Branchinecta lynchi vernal pool fairy shrimp (T) Desmocerus californicus dimorphus valley elderberry longhorn beetle (T) Speyeria callippe callippe callippe silverspot butterfly (E) Fish Hypomesus transpacificus Critical habitat, delta smelt (X) delta smelt (T) Oncorhynchus mykiss Central California Coastal steelhead (T) (NMFS) Central Valley steelhead (T) (NMFS) Oncorhynchus tshawytscha Central Valley spring-run chinook salmon (T) (NMFS) winter-run chinook salmon, Sacramento River (E) (NMFS) Amphibians Ambystoma californiense California tiger salamander, central population (T) Rana draytonii California red-legged frog (T) Critical habitat, California red-legged frog (X) Reptiles Masticophis lateralis euryxanthus Alameda whipsnake [=striped racer] (T) Critical habitat, Alameda whipsnake (X) Thamnophis gigas giant garter snake (T) Birds Rallus longirostris obsoletus California clapper rail (E) www.fws.gov/sacramento/es_species/lists/es_species_lists.cfm 1/2 7/3/13 Sacramento Fish & Wildlife Office Species List Sternula antillarum (=Sterna, =albifrons) browni California least tern (E) Mammals Vulpes macrotis mutica San Joaquin kit fox (E) Plants Amsinckia grandiflora large-flowered fiddleneck (E) Lasthenia conjugens Contra Costa goldfields (E) Oenothera deltoides ssp. howellii Antioch Dunes evening-primrose (E) Quads Containing Listed, Proposed or Candidate Species: CLAYTON (464B) DIABLO (464C) WALNUT CREEK (465A) LAS TRAMPAS RIDGE (465D)

www.fws.gov/sacramento/es_species/lists/es_species_lists.cfm 2/2 7/3/13 Sacramento Fish & Wildlife Office Species List

Key: (E) Endangered - Listed as being in danger of extinction. (T) Threatened - Listed as likely to become endangered within the foreseeable future. (P) Proposed - Officially proposed in the Federal Register for listing as endangered or threatened. (NMFS) Species under the Jurisdiction of the National Oceanic & Atmospheric Administration Fisheries Service. Consult with them directly about these species. Critical Habitat - Area essential to the conservation of a species. (PX) Proposed Critical Habitat - The species is already listed. Critical habitat is being proposed for it. (C) Candidate - Candidate to become a proposed species. (V) Vacated by a court order. Not currently in effect. Being reviewed by the Service. (X) Critical Habitat designated for this species

Important Information About Your Species List How We Make Species Lists We store information about endangered and threatened species lists by U.S. Geological Survey 7½ minute quads. The United States is divided into these quads, which are about the size of San Francisco.

The animals on your species list are ones that occur within, or may be affected byprojects within, the quads covered by the list. Fish and other aquatic species appear on your list if they are in the same watershed as your quad or if water use in your quad might affect them. Amphibians will be on the list for a quad or county if pesticides applied in that area may be carried to their habitat by air currents. Birds are shown regardless of whether they are resident or migratory. Relevant birds on the county list should be considered regardless of whether they appear on a quad list.

Plants Any plants on your list are ones that have actually been observed in the area covered by the list. Plants may exist in an area without ever having been detected there. You can find out what's in the surrounding quads through the California Native Plant Society's onlineInventory of Rare and Endangered Plants.

Surveying Some of the species on your list may not be affected by your project. A trained biologist and/or botanist, familiar with the habitat requirements of the species on your list, should determine whether they or habitats suitable for them may be affected by your project. We recommend that your surveys include any proposed and candidate species on your list. See our Protocol and Recovery Permits pages. For plant surveys, we recommend using the Guidelines for Conducting and Reporting Botanical Inventories. The results of your surveys should be published in any environmental documents prepared for your project.

Your Responsibilities Under the Endangered Species Act All animals identified as listed above are fully protected under the Endangered Species Act of 1973, as amended. Section 9 of the Act and its implementing regulations prohibit the take

of a federally listed wildlife species. Take is defined by the Act as "to harass, harm, pursue, hunt, shoot, wound, kill, trap, capture, or collect" any such animal. www.fws.gov/sacramento/es_species/lists/es_species_lists.cfm 1/3 7/3/13 Sacramento Fish & Wildlife Office Species List Take may include significant habitat modification or degradation where it actually kills or injures wildlife by significantly impairing essential behavioral patterns, including breeding, feeding, or shelter (50 CFR §17.3).

Take incidental to an otherwise lawful activity may be authorized by one of two procedures: If a Federal agency is involved with the permitting, funding, or carrying out of a project that may result in take, then that agency must engage in a formal consultation with the Service. During formal consultation, the Federal agency, the applicant and the Service work together to avoid or minimize the impact on listed species and their habitat. Such consultation would result in a biological opinion by the Service addressing the anticipated effect of the project on listed and proposed species. The opinion may authorize a limited level of incidental take. If no Federal agency is involved with the project, and federally listed species may be taken as part of the project, then you, the applicant, should apply for an incidental take permit. The Service may issue such a permit if you submit a satisfactory conservation plan for the species that would be affected by your project. Should your survey determine that federally listed or proposed species occur in the area and are likely to be affected by the project, we recommend that you work with this office and the California Department of Fish and Game to develop a plan that minimizes the project's direct and indirect impacts to listed species and compensates for project- related loss of habitat. You should include the plan in any environmental documents you file.

Critical Habitat When a species is listed as endangered or threatened, areas of habitat considered essential to its conservation may be designated as critical habitat. These areas may require special management considerations or protection. They provide needed space for growth and normal behavior; food, water, air, light, other nutritional or physiological requirements; cover or shelter; and sites for breeding, reproduction, rearing of offspring, germination or seed dispersal. Although critical habitat may be designated on private or State lands, activities on these lands are not restricted unless there is Federal involvement in the activities or direct harm to listed wildlife. If any species has proposed or designated critical habitat within a quad, there will be a separate line for this on the species list. Boundary descriptions of the critical habitat may be found in the Federal Register. The information is also reprinted in the Code of Federal Regulations (50 CFR 17.95). See our Map Room page.

Candidate Species We recommend that you address impacts to candidate species. We put plants and animals on our candidate list when we have enough scientific information to eventually propose them for listing as threatened or endangered. By considering these species early in your planning process you may be able to avoid the problems that could develop if one of these

candidates was listed before the end of your project.

Species of Concern The Sacramento Fish & Wildlife Office no longer maintains a list of species of concern. However, various other agencies and organizations maintain lists of at-risk species. These www.fws.gov/sacramento/es_species/lists/es_species_lists.cfm 2/3 7/3/13 Sacramento Fish & Wildlife Office Species List However, various other agencies and organizations maintain lists of at-risk species. These lists provide essential information for land management planning and conservation efforts.More info

Wetlands If your project will impact wetlands, riparian habitat, or other jurisdictional waters as defined by section 404 of the Clean Water Act and/or section 10 of the Rivers and Harbors Act, you will need to obtain a permit from the U.S. Army Corps of Engineers. Impacts to wetland habitats require site specific mitigation and monitoring. For questions regarding wetlands, please contact Mark Littlefield of this office at (916) 414-6520.

Updates Our database is constantly updated as species are proposed, listed and delisted. If you address proposed and candidate species in your planning, this should not be a problem. However, we recommend that you get an updated list every 90 days. That would be October 01, 2013.

www.fws.gov/sacramento/es_species/lists/es_species_lists.cfm 3/3 City of Walnut Creek Shadelands Gateway Specific Plan and The Orchards at Walnut Creek Project Draft EIR

C.3 ‐ CNPS Records Search 07.03.2013

FirstCarbon Solutions H:\Client (PN‐JN)\3611\36110005\EIR\4 ‐ EIR2\36110005 Sec99‐99 Appendix Dividers.doc 7/3/13 CNPS Inventory Results

Plant List

66 matches found. Click on scientific name for details

Search Criteria

Found in 9 Quads around 37122H1

Rare Plant State Global Scientific Name Common Name Family Lifeform Rank Rank Rank bent-flowered Amsinckia lunaris Boraginaceae annual herb 1B.2 S2? G2? fiddleneck Androsace elongata ssp. G5? California androsace Primulaceae annual herb 4.2 S3.2? acuta T3T4 Anomobryum julaceum slender silver moss Bryaceae moss 2B.2 S2 G4G5 Arabis blepharophylla coast rockcress Brassicaceae perennial herb 4.3 S3.3? G3 perennial Arctostaphylos auriculata Mt. Diablo manzanita Ericaceae 1B.3 S2 G2 evergreen shrub Arctostaphylos manzanita Contra Costa perennial Ericaceae 1B.2 S2 G5T2 ssp. laevigata manzanita evergreen shrub perennial Arctostaphylos pallida pallid manzanita Ericaceae 1B.1 S1 G1 evergreen shrub Astragalus tener var. tener alkali milk-vetch Fabaceae annual herb 1B.2 S2 G2T2 Atriplex cordulata var. heartscale Chenopodiaceae annual herb 1B.2 S2.2? G3T2 cordulata San Joaquin Atriplex joaquinana Chenopodiaceae annual herb 1B.2 S2 G2 spearscale Balsamorhiza macrolepis big-scale balsamroot Asteraceae perennial herb 1B.2 S2 G2 Blepharizonia plumosa big tarplant Asteraceae annual herb 1B.1 S1 G1 Calandrinia breweri Brewer's calandrinia Montiaceae annual herb 4.2 S3.2? G4 California macrophylla round-leaved filaree Geraniaceae annual herb 1B.1 S2 G2 perennial Calochortus pulchellus Mt. Diablo fairy-lantern Liliaceae 1B.2 S2 G2 bulbiferous herb perennial Calochortus umbellatus Oakland star-tulip Liliaceae 4.2 S3.2 G3 bulbiferous herb Campanula exigua chaparral harebell Campanulaceae annual herb 1B.2 S2.2 G2 Centromadia parryi ssp. Congdon's tarplant Asteraceae annual herb 1B.1 S2 G4T2 congdonii Chloropyron molle ssp. annual herb soft bird's-beak Orobanchaceae 1B.2 S1 G2T1 molle (hemiparasitic) Chorizanthe robusta var. robust spineflower Polygonaceae annual herb 1B.1 S1 G2T1 robusta wwCwi.craurteap lmantas.ccunplas.toar gv/arers.ult.html?adv=tB&qouladn=d3e71r2's2 Hw1a:9ter- 1/3 7/3/13 CNPS Inventory Results Cicuta maculata var. Bolander's water- Apiaceae perennial herb 2B.1 S2 G5T3T4 bolanderi hemlock Cirsium andrewsii Franciscan thistle Asteraceae perennial herb 1B.2 S2.2 G2 Clarkia concinna ssp. Santa Clara red ribbons Onagraceae annual herb 4.3 S3.3 G5?T3 automixa Clarkia franciscana Presidio clarkia Onagraceae annual herb 1B.1 S1 G1 annual herb Cordylanthus nidularius Mt. Diablo bird's-beak Orobanchaceae 1B.1 S1 G1 (hemiparasitic) Delphinium californicum ssp. Hospital Canyon Ranunculaceae perennial herb 1B.2 S2? G3T2? interius larkspur Didymodon norrisii Norris' beard moss Pottiaceae moss 2B.2 S3S4 G3G4 perennial Dirca occidentalis western leatherwood Thymelaeaceae 1B.2 S2S3 G2G3 deciduous shrub Eriogonum luteolum var. Tiburon buckwheat Polygonaceae annual herb 1B.2 S2 G5T2 caninum Eriogonum truncatum Mt. Diablo buckwheat Polygonaceae annual herb 1B.1 S2 G2 Erysimum capitatum var. Contra Costa wallflower Brassicaceae perennial herb 1B.1 S1 G5T1 angustatum perennial Fritillaria liliacea fragrant fritillary Liliaceae 1B.2 S2 G2 bulbiferous herb Helianthella castanea Diablo helianthella Asteraceae perennial herb 1B.2 S2 G2 Hesperolinon breweri Brewer's western flax Linaceae annual herb 1B.2 S2 G2 Hoita strobilina Loma Prieta hoita Fabaceae perennial herb 1B.1 S2 G2 Holocarpha macradenia Santa Cruz tarplant Asteraceae annual herb 1B.1 S1 G1 Horkelia cuneata var. sericea Kellogg's horkelia Rosaceae perennial herb 1B.1 S2? G4T2 perennial Iris longipetala coast iris Iridaceae 4.2 S3.2 G3 rhizomatous herb Isocoma arguta Carquinez goldenbush Asteraceae perennial shrub 1B.1 S1 G1 Northern California perennial Juglans hindsii Juglandaceae 1B.1 S1 G1 black walnut deciduous tree Lasthenia conjugens Contra Costa goldfields Asteraceae annual herb 1B.1 S1 G1 Lathyrus jepsonii var. Delta tule pea Fabaceae perennial herb 1B.2 S2.2 G5T2 jepsonii perennial Lilaeopsis masonii Mason's lilaeopsis Apiaceae 1B.1 S2 G2 rhizomatous herb perennial Limosella australis Delta mudwort Scrophulariaceae 2B.1 S2 G4G5 stoloniferous herb perennial Malacothamnus hallii Hall's bush-mallow Malvaceae 1B.2 S2 G2Q evergreen shrub Meconella oregana Oregon meconella Papaveraceae annual herb 1B.1 S1 G2G3 Micropus amphibolus Mt. Diablo cottonweed Asteraceae annual herb 3.2 S3.2? G3 Monardella antonina ssp. San Antonio Hills perennial Lamiaceae 3 S3? G4T3Q antonina monardella rhizomatous herb Monolopia gracilens woodland woolythreads Asteraceae annual herb 1B.2 S2S3 G2G3 Navarretia gowenii Lime Ridge navarretia Polemoniaceae annual herb 1B.1 S1 G1 wwNwa.rvaarerprleatnitas. cnnipgse.olrligfo/rremsuilts.h tsmsl?pa.dv=t&quad=37122H1:9 2/3 7/3/13 CNPS Inventory Results Navarretia nigelliformis ssp. shining navarretia Polemoniaceae annual herb 1B.2 S2 G4T2 radians Oenothera deltoides ssp. Antioch Dunes evening- Onagraceae perennial herb 1B.1 S1 G5T1 howellii primrose Phacelia phacelioides Mt. Diablo phacelia Boraginaceae annual herb 1B.2 S1 G1 San Francisco popcorn- Plagiobothrys diffusus Boraginaceae annual herb 1B.1 S1 G1Q flower Polygonum marinense Marin knotweed Polygonaceae annual herb 3.1 S2 G2Q Sanicula maritima adobe sanicle Apiaceae perennial herb 1B.1 S2.2 G2 Sanicula saxatilis rock sanicle Apiaceae perennial herb 1B.2 S2 G2 Senecio aphanactis chaparral ragwort Asteraceae annual herb 2B.2 S2 G3? Streptanthus albidus ssp. most beautiful jewel- Brassicaceae annual herb 1B.2 S2.2 G2T2 peramoenus flower Streptanthus hispidus Mt. Diablo jewel-flower Brassicaceae annual herb 1B.3 S1 G1 slender-leaved Potamogetonaceae perennial 2B.2 S3 G5 Stuckenia filiformis pondweed rhizomatous herb perennial Symphyotrichum lentum Suisun Marsh aster Asteraceae 1B.2 S2 G2 rhizomatous herb Trifolium hydrophilum saline clover Fabaceae annual herb 1B.2 S2 G2 Triquetrella californica coastal triquetrella Pottiaceae moss 1B.2 S1 G1 caper-fruited Tropidocarpum capparideum Brassicaceae annual herb 1B.1 S1 G1 tropidocarpum perennial Viburnum ellipticum oval-leaved viburnum Adoxaceae 2B.3 S2.3 G5 deciduous shrub

Suggested Citation

California Native Plant Society (CNPS). 2013. Inventory of Rare and Endangered Plants (online edition, v8- 02). California Native Plant Society. Sacramento, CA. Accessed on Wednesday, July 03, 2013.

Search the Inventory Information Contributors Simple Search About the Inventory The Calflora Database Advanced Search About the Rare Plant Program Glossary CNPS Home Page About CNPS Join CNPS

© Copyright 2010 California Native Plant Society. All rights reserved.

www.rareplants.cnps.org/result.html?adv=t&quad=37122H1:9 3/3 City of Walnut Creek Shadelands Gateway Specific Plan and The Orchards at Walnut Creek Project Draft EIR

C.4 ‐ Biological Constraints Analysis 07.06.2007

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City of Walnut Creek Shadelands Gateway Specific Plan and The Orchards at Walnut Creek Project Draft EIR

C.5 ‐ Arborist Survey 11.18.2007

FirstCarbon Solutions H:\Client (PN‐JN)\3611\36110005\EIR\4 ‐ EIR2\36110005 Sec99‐99 Appendix Dividers.doc

November 18, 2010

Kalina Kunert Safeway, Inc. 11555 Dublin Canyon Road Pleasanton, California 94588

RE: SHADELANDS ARBORIST SURVEY – PARCELS A AND B

Dear Kalina,

WRA, Inc. arborist Morgan Trieger (ISA-Certified Arborist # WE-8667A) surveyed existing trees on Parcels A and B of the subject property (Study Area) located at the corner of Ygnacio Valley Road and Oak Grove Road, in Walnut Creek, California (Figure 1). This letter reviews the methods and results of the survey. A map depicting the location of all surveyed trees is included with this letter (Figure 1).

Methods

The Study Area was traversed on foot on November 17, 2010. All trees over approximately three inches in diameter were identified, locations were recorded using a Trimble GeoXH GPS unit with sub-meter accuracy, and diameters in inches at breast height (DBH, 4.5 feet above grade) were recorded. For trees with multiple stems arising at breast height, DBH given represents the sum of the diameters of all stems at breast height. During the survey, emphasis was placed on noting tree health conditions, as well as indicators of possible tree disease, if present. Representative photographs were taken, and are included with this letter.

Results

The Study Area consists a developed office complex bordered by Shadelands Drive to the north, undeveloped parcels C and D to the east, Ygnacio Valley Road to the south, and North Via Monte to the west. The office complex and parking lots contain many ornamental trees and shrubs. Shrub locations were not recorded.

A total of two hundred and seven trees were surveyed on Parcels A and B. Species observed and average diameters are summarized in Table 1. Species observed included primarily locust (Gleditsia sp.), coast redwood (Sequoia sempervirens) and sweetgum (Liquidambar styraciflua) as ornamental trees incorporated into the office complex landscaping and parking lots. Several large, remnant valley oak (Quercus lobata) were also present and incorporated into the office complex hardscape.

Other trees observed included both native and ornamental trees including Chinese elm (Ulmus parviflora), coast live oak (Quercus agrifolia), Deodar cedar (Cedrus deodara), holly oak (Quercus ilex), Japanese maple (Acer palmatum), magnolia (Magnolia sp.), maple (Acer sp.), mimosa (Albizia sp.), Northern California black walnut (Juglans californica var. hindsii), privet (Ligustrum sp.), Prunus (Prunus sp.), Raywood ash (Fraxinus oxycapra ‘Raywood’), scarlet oak (Quercus coccinea), Italian stone pine (Pinus pinea) and Valley oak.

Table 1. Shadelands Parcels A and B Tree Survey Summary Table Tree Species Number of Trees Observed Average DBH Chinese elm 3 25.3 coast live oak 9 32.9 coast redwood 35 19.2 Deodar cedar 9 11.4 holly oak 83 11.7 Japanese maple 1 31.8 liquidamber 1 23.8 locust 27 11.5 magnolia 3 12.9 maple 4 41.9 mimosa 9 14.2 Northern California black walnut 7 24.7 privet 1 12.8 Prunus 1 10.0 Raywood ash 9 37.2 scarlet oak 1 5.1 Italian stone pine 2 8.7 Valley oak 2 20.2 Total trees 207 --

Discussion

The most prevalent tree deficiency observed within the Study Area was mechanical damage. Mechanical damage includes physical injury to tree stems or exposed roots, usually resulting from contact with vehicles or maintenance equipment. Within the Study Area, many of the locust trees planted on parking lot islands have presumably been bumped by cars in the past, resulting in damage to bark. However, none of these wounds appeared to be serious enough to greatly threaten the tree. Some larger trees, including pines planted along North Via Monte, show evidence of mechanical damage to exposed root structures. This is most likely due to landscaping activities such as lawn mowing, as the root structures are protruding into areas of landscaped turf. Again, these injuries are not serious enough to greatly threaten these mature trees.

Oak trees within the Study Area were generally old, presumably having been present on site pre-development. Most had indicators of senescence including reduced vigor, some dieback of small limbs and twigs, twig galls, stem or limb cavities and some amount of stem and limb decay. Decay resulting from old wounds such as fallen limbs was prevalent in older trees. However, oak trees appeared to be in relatively good health and free of major disease, despite some apparent decline resulting from old age.

Northern California black walnut is considered a rare species by the California Native Plant Society (List 1B) when found in native (pre-European contact) stands. Currently several stands from Contra Costa, Napa and possibly Lake County are considered native (CNPS 2010). This species has been widely naturalized in California, used as rootstock for plantations, and easily hybridizes with English walnut (J. regia). Walnut trees within the Study Area are likely remnant trees from an historic orchard or homestead planting and are not considered to be a native stand. Walnut trees within the Study Area were generally old and senescent, however they were in better health than walnut trees observed in Parcels C and D in April 2010 (WRA 2010).

2

Walnut trees on Parcels A and B were not affected by the same pathogen as appears to be present in Parcels C and D. Symptoms of decline are likely only due to old age and natural senescence.

Several trees along Ygnacio Valley Road are infested with English ivy (Hedera helix). Ivy infestation can eventually kill a tree through suffocation or structural failure caused by the increased weight of the ivy infestation.

Conclusion

Overall, no serious health problems or tree damage were observed in the tree species observed within the Study Area. Most of the trees appear to have been planted as ornamental landscaping, and are regularly pruned and irrigated or otherwise maintained. Many of the trees, especially Valley oaks, Japanese maple, liquidambar and Chinese elm trees located adjacent to the buildings, are large trees in good health. Continued periodic maintenance by qualified professionals will help maintain the overall healthy trees located within the Study Area.

English ivy should be removed from several trees along Ygnacio Valley Road to prevent infestation and future damage to these trees. Ivy can be cut back to the ground and should be periodically monitored to prevent re-infestation.

Please do not hesitate to contact me if you have any questions or if you require additional information.

Sincerely,

Morgan Trieger Arborist (#WE-8667A) WRA, Inc

References

California Native Plant Society (CNPS). 2010. Online Inventory of Rare and Endangered Plants. Accessed November 18, 2010 at http://www.cnps.org/cnps/rareplants/inventory/

WRA, Inc. 2010. Shadelands Arborist Survey. Prepared for Safeway, Inc. April 27.

Encl.

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Representative Site Photographs Top: Pines and redwoods along North Via Monte in Parcel A. Bottom: Locust trees are planted on many of the parking lot islands in both parcels. Photo is looking into Parcel B from Parcel A. Photographs taken November 17, 2010

Representative Site Photographs Top: Remnant Valley Oak and Japanese maple in Parcel B. Bottom: Example of shrubs that were not surveyed. These are planted along Ygnacio Valley Road in the southern portion of Parcel B. Photographs taken November 17, 2010