HomeMy WebLinkAboutCT 98-14; Thompson/Tabata; Tentative Map (CT) (166)APPENDIX A
VASCULAR PLANT SPECIES OBSERVED
ON THE PROJECT SITE
ANGIOSPERMAE (DICOTYLEDONES)
ANACARDIACEAE - SUMAC FAMILY
Rhus integrifolia - lemonadeberry
Malosma laurina - laurel sumac
APIACEAE - CARROT FAMILY
* Foeniculum vulgare - sweet fennel
ASTERACEAE - SUNFLOWER FAMILY
Artemisia californica - coastal sagebrush
Baccharis pilularis ssp. consanguinea - coyote brush
* Carduus pycnocephalus - Italian thistle
* Centaurea melitensis - tocalote
* Chrysanthemum coronarium - garland chrysanthemum
* Conyza canadensis - common horseweed
Encelia californica - California bush sunflower
Hemizonia fasciculata - fascicled tarweed
Heterotheca grandiflora - telegraph weed
BRASSICACEAE - MUSTARD FAMILY
* Brassica nigra - black mustard
* Raphanus sativus - wild radish
CACTACEAE - CACTUS FAMILY
Opuntia littoralis - coastal prickly-pear
CHENOPODIACEAE - GOOSEFOOT FAMILY
* Salsola tragus - Russian-thistle
FABACEAE - PEA FAMILY
Lotus scoparius - deerweed
LAMIACEAE - MINT FAMILY
Salvia mellifera - black sage
MALVACEAE - MALLOW FAMILY
Malocothamnus fasciculatus - mesa bushmallow
MYRTACEAE - MYRTLE FAMILY
* Eucalyptus sp. - eucalyptus
POLYGONACEAE - BUCKWHEAT FAMILY
Eriogonum fasciculatum - flat-top buckwheat
PRIMULACEAE - PRIMROSE FAMILY
* Anagallis arvensis - scarlet pimpernel
ROSACEAE - ROSE FAMILY
Heteromeles arbutifolia - toyon
SAURURACEAE - LIZARD-TAIL FAMILY
Anemopsis californica - yerba mansa
Eriodictyon crassifolia - yerba santa
SCROPHULARIACEAE - FIGWORT FAMILY
Mimulus aurantiacus - bush monkeyflower
SALICACEAE - WILLOW FAMILY
Salix lasiolepis - arroyo willow
Salix laevigata - red willow
SOLANACEAE - NIGHTSHADE FAMILY
* Nicotiana glauca - tree tobacco
TAMARICACEAE - TAMARISK FAMILY
* Tamarix sp. - tamarisk
ANGIOSPERMAE (MONOCOTYLEDONES)
LILIACEAE - LILY FAMILY
Yucca whipplei - our lord's candle
POACEAE - GRASS FAMILY
* Arundo donax - giant cane
* Avena barbata - slender oat
* Avena fatua - wild oats
* Bromus diandrus - ripgut grass
* Bromus hordeaceus - soft chess
* Bromus madritensis ssp. rubens - foxtail chess
* Cortaderia jubata - Atacama pampas grass
* Lolium multiflorum - English ryegrass
* denotes non-native, introduced species
APPENDIX B
WILDLIFE SPECIES OBSERVED OR
DETECTED ON THE PROJECT SITE
REPTILES
IGUANIDAE - IGUANID LIZARDS
Uta stansburiana elegans - side-blotched lizard
Sceloporus occidentalis longipes - Great Basin fence lizard
BIRDS
COLUMBIDAE - PIGEONS & DOVES
Zenaida macroura - mourning dove
TROCHILIDAE - HUMMINGBIRDS
Calypte anna - Anna's hummingbird
TYRANNIDAE - TYRANT FLYCATCHERS
Sayornis nigricans - black phoebe
Tyrannus verticalis - western kingbird
CORVTOAE - JAYS & CROWS
Aphelocoma coerulescens - scrub jay
Corvus corax - common raven
MIMIDAE - THRASHERS
Mimus polyglottos - northern mockingbird
AEGITHALIDAE - BUSHTITS
Psaltriparus minimus - bushtit
TROGLODYTIDAE - WRENS
Thryomanes bewickii - Bewick's wren
EMBERIZIDAE - WOOD WARBLERS, TANAGERS, BUNTINGS & BLACKBIRDS
Pipilo crissalis - California towhee
Sturnella neglecta - western meadowlark
FRINGILLIDAE - FINCHES
Carpodacus mexicanus - house finch
Carduelis psaltria - lesser goldfinch
DUDEK Engineering, Planning, Corporate Office: 760.942.5147
Environmental Sciences and 605 Third Street Fax 760.632.0164
& ASSOCIATES, INC. „ „ . ,_..„,.,. „„„„„Management Services Encimtas, California 92024
30 August 1998 1671-02
Gregg Linhoff
Standard Pacific Homes
9335 Chesapeake Dr.
San Diego, Ca 92123
Re: Biological Survey and Vegetation Staking of the Thompson Property, City of
Carlsbad
Dear Mr. Linhoff:
A biological reconnaissance survey was conducted of the approximately 79.4-acre Thompson
property situated in the City of Carlsbad in the western portion of San Diego County,
California. A total of 74.9 acres of the property are proposed for the development, the
balance of which is currently dedicated to the City of Carlsbad hi the form of Poinsettia Lane
and a small portion of Rose Lane. The property is located west of El Camino Real, adjacent
to Poinsettia Lane and Aviara Parkway, east of Interstate 5, south of Palomar Airport Road
and north of Batiquitos Lagoon (Figures 1 and 2). The property is surrounded by agriculture
and greenhouse production or residential development with a strip of developed native
vegetation located to the east. Biological surveys of the property were conducted hi
December 1997 and June 1998 by Dudek & Associates (DUDEK) to assess the existing
conditions of the biological resources and stake or flag native vegetation that may be present.
The surveys augmented the existing data base accumulated through previous survey work
(e.g., SANDAG 1994). The purpose of the visit was to identify the habitat types present, and
identify constraints to development of the property.
1.0 METHODS AND SURVEY LIMITATIONS
Data regarding biological resources present on the project site were obtained through a
review of pertinent literature and through field reconnaissance.
1.1 LITERATURE REVIEW
Biological resources present or potentially present on the Thompson property were identified
through a variety of environmental studies and reports including the Multiple Habitat
Conservation Program (SANDAG, 1997) and draft Habitat Management Plan for Natural
Communities hi the City of Carlsbad (December 1, 1997). General information regarding
wildlife species present in the region was obtained from Unitt (1984) for birds, Bond (1977)
for mammals, and Stebbins (1984) for reptiles and amphibians.
San Diego
Imperial
Beach
1"-8 Miles Tijuana
Mexico
Thompson Property - Biological Resources Letter Report & Impact Analysis
Regional Map
\\ V \ \
BASE MAP SOURCE: USGS 7.5 Minute Series, Encinitas Quadrangle 1"=2000'
Thompson Property - Biological Resources Letter Report & Impact Analysis
Vicinity Map
Mr. Gregg Linhoff 30 August 1998
Re: Biological Reconnaissance Survey For the Thompson Property Pg. 4
1.2 FIELD RECONNAISSANCE
Biological surveys of the Thompson property were conducted by DUDEK biologist Anita M.
Hay worth, Ph.D. on 29 and 30 December 1997. Vegetation staking or flagging took place
on June 11, 1998. All surveys were conducted by foot under favorable weather conditions,
and all areas of the property were visited and inventoried for biotic components. The time of
the surveys was generally between 0800 and 1200 for approximately 2 to 3 hours for each
visit. Weather conditions were typically mild with temperatures ranging from 60 to 70 °F,
windspeed from 1-8 MPH, and skies clear.
1.2.1 Resource Mapping
Plant communities were mapped in the field onto a 100-scale (1" = 100') topography map of
the site. Plant community classifications used hi this report follow Holland (1986), with
modifications to accommodate the lack of conformity of the observed communities to those
of Holland. Locations of rare or sensitive plant and wildlife species also were mapped.
During the reconnaissance survey of the property, the area along the eastern property
boundary adjacent to the area proposed for development was delimited at the edge of the
coastal sage scrub vegetation. The delimiting was placed appropriately at the edge of the
coastal sage scrub vegetation by either tying a strip of flagging hi the shrub at the edge of the
native vegetation or to the fenceline which served as a delimiter for the boundary of the
native vegetation and the agriculture fields. The flagged area was then surveyed by a civil
engineer and the survey line was provided to DUDEK as a digital AutoCadd file. Thus,
provided that no encroachment is made beyond the staked line, no impacts to coastal sage
scrub due to the proposed development would occur.
1.2.2 Flora
All plant species encountered during the field surveys were identified and recorded. Species
that could not be identified immediately hi the field were brought back into the laboratory for
further investigation. Lathi and common names of plants used hi this report follow the
Jepson Manual (Hickman 1993). Where not listed hi Hickman (1993), common names are
taken from Beauchamp (1986).
1.2.3 Fauna
Wildlife species detected during field surveys by sight, calls, tracks, scat, or other sign were
recorded. Although daytime surveys result hi the greatest number and highest diversity of
wildlife sightings (because most birds are diurnal), many species of mammals are not
observable during the day because of then- nocturnal habits. In addition, many species of
reptiles have extremely secretive habits, and hence, are difficult to detect as well.
Mr. Gregg Linhoff 30 August 1998
Re: Biological Reconnaissance Survey For the Thompson Property Pg, 5
Binoculars (10 x 50 power) were used to aid in the identification of observed animals.
Latin and common names used in this report follow Stebbins (1985) for reptiles and
amphibians, American Ornithologists' Union (1983, 1989) for birds, and Jones et al. (1992)
for mammals.
1.2.4 Sensitive Biological Resources
Sensitive biological resources are those defined as follows: (1) species that have been given
special recognition by federal, state, or local conservation agencies and organizations due to
limited, declining, or threatened population sizes and (2) habitat areas or plant communities
that are unique, are of relatively limited distribution, or are of particular value to wildlife.
During the field work a special effort was made to survey more thoroughly those areas
suspected to support sensitive resources. Most potentially occurring sensitive plants are
perennials that can be detected at any time of year if present hi substantial numbers.
1.3 SURVEY LIMITATIONS
Limitations of the surveys include a diurnal bias and seasonal constraints as well as the focus
of the survey being on a reconnaissance level of mapping and identification. For
convenience and maximum visibility, surveys were conducted during the day tune hours.
Although diurnal surveys maximize the number of observations of birds, which represent the
largest component of the vertebrate fauna, they usually result hi few observations of
mammals, many of which are active primarily at night. No mammal trapping was
conducted. No focused surveys were conducted for sensitive species.
Many species of reptiles and amphibians are secretive hi their habitats and are rarely
observed using normal survey techniques. No drift lines or pit fall traps were employed.
2.0 PHYSICAL CHARACTERISTICS
2.1 Site Description
Land use within the Thompson property is currently predominantly active agriculture,
including greenhouse production of plant material. Much of the property appears to have
been graded hi the past. The property is surrounded by existing or planned developed on
three sides. Along the eastern boundary, the property is adjacent to open space along the
northern two-thirds of the eastern property line. The property is situated near the north
central portion of the USGS 7.5 minute Encinitas quadrangle.
The topography onsite consists of predominantly flat terrain with an east-facing steep slope of
native vegetation along the eastern property boundary. Poinsettia Lane, a four lane
circulation element, bisects the northern portion of the property in an east-west direction.
Mr. Gregg Linhoff 30 August 1998
Re: Biological Reconnaissance Survey For the Thompson Property Pg. 6
Elevations range from approximately 185 feet above mean sea level (AMSL) to
approximately 300 feet AMSL .
3.0 RESULTS
3.1 BOTANY - PLANT COMMUNITIES AND FLORAL DIVERSITY
Based on species composition and general physiognomy, three plant communities (or habitat
types) were identified within the Thompson property: coastal sage scrub, southern willow
scrub, and disturbed habitat hi the form of active agriculture, developed land, and landscape
plantings. The existing plant communities are described below and their distribution onsite is
presented hi Figure 3. Table 1 presents the acreage of each vegetation type present onsite.
TABLE 1
Existing Plant Community Acreages
Plant Community (abbreviation used on map)
Coastal Sage Scrub (CSS)
Southern Willow Scrub (SWS)
Disturbed Habitat (DH)
TOTALS
Existing
Acreage
1.8
0.1
77.5
79.4
3.1.1 Coastal Sage Scrub
Coastal sage scrub is a native plant community characterized by a variety of soft, low,
aromatic, drought-deciduous shrubs, such as California sagebrush (Artemisia calif arnica),
flat-top buckwheat (Eriogonumfasciculatum), California bush sunflower (Encelia
californica), and sages (Salvia spp.), with scattered evergreen shrubs, including
lemonadeberry (Rhus integrifolia), laurel sumac (Malosma laurina), and toyon (Heteromeles
arbutifolid). It typically develops on south-facing slopes and other xeric situations. Coastal
sage scrub is considered a sensitive habitat type because of its depleted nature and the large
number of sensitive plant and wildlife species that it supports. Coastal sage scrub is the
focus of the present State of California's Natural Communities Conservation Program
(NCCP).
Vegetation Types/Landcovers:
[ CSS I Coastal Sage Scrub
I SWS | Southern Willow Scrub
DH I Disturbed Habitat
BASE TOPO SOURCE: Buccola Engineering
250
Scale In Feet
!
Thompson Property - Biological Resources Letter Report & Impact Analysis
Biological Resources Map .
;: • ';•'
Mr. Gregg Linhoff 30 August 1998
Re: Biological Reconnaissance Survey For the Thompson Property Pg. 8
Onsite, coastal sage scrub occurs along the eastern property line as a narrow band of habitat
that continues offsite within the open space located between the property and Aviara
Parkway. A total of 1.8 acres of coastal sage scrub is located onsite. The habitat is very
diverse and is dominated by California sagebrush and includes flat-top buckwheat, California
bush sunflower, black sage (Salvia melliferd), laurel sumac, lemonadeberry, prickly pear
(Opuntia littoralis), and other plant species. Patches of eucalyptus woodland occur within
the open space area adjacent to the coastal sage scrub.
3.1.2 Southern Willow Scrub
Holland (1986) describes southern willow scrub as "dense, broadleafed, winter-deciduous
riparian thickets dominated by several species of [willows] Salix, with scattered emergent
[Fremont cottonwood] Populus fremontii and [western sycamore] Platanus racemosa." The
understory is usually depauperate owing to the dense canopy.
Within the property there is one patch of riparian habitat that are dominated by arroyo
willow (Salix lasiolepis) and red willow (Salix laevigata) with tamarisk (Tamarix sp.) and
giant cane (Arundo donax) also present. The patch of southern willow scrub is located along
the western property boundary adjacent to the paved access road to the site. It appears to be
located within a manmade water retention or desiltation basin. Non-native grasses are
present along the edges of the basin which would likely also be considered the jurisdiction of
the regulating agencies. A total of 0.10 acre of southern willow scrub is located within the
basin. Although the southern willow scrub habitat area is moderately disturbed, it is
considered sensitive because it represents wetland habitat that is regulated by the U.S. Army
Corps of Engineers and the California Department of Fish and Game.
3.1.3 Disturbed Habitat
For purposes of this document, disturbed habitat includes areas in agriculture production,
developed areas that include paved roads and existing houses, pavement and buildings, and
landscaped areas along the manufactured slopes of Poinsettia Lane and the housing
developments along the property boundaries. Major portions of the property (77.5 acres) are
comprised of disturbed habitat.
3.1.4 Floral Diversity
A total of 39 species of vascular plants were recorded from the site (Appendix A). The
relatively low floral diversity of the area is the result of the large amount of disturbed habitat
in the form of agricultural production onsite.
Mr. Gregg Linhoff 30 August 1998
Re: Biological Reconnaissance Survey For the Thompson Property Pg. 9
3.2 ZOOLOGY - WILDLIFE DIVERSITY
Thirteen species of birds were observed during the surveys. The most commonly
encountered residents in project area include California towhee (Pipilo crissalis), house finch
(Carpodacus mexicanus) and scrub jay (Aphelocoma coerulescens). Because the document
was prepared as a reconnaissance survey, it is likely that not all bird species present within
the property were detected.
One mammal species, California ground squirrel (Spermophilus beecheyf), was observed
onsite. Two reptile species were observed pnsite.
3.3 SENSITIVE BIOLOGICAL RESOURCES
The following resources are discussed hi this section: (1) plant and animal species present in
the project vicinity that are given special recognition by federal, state, or local conservation
agencies and organizations owing to declining, limited, or threatened populations, that are the
results, hi most cases, of habitat reduction; and (2) habitat areas that are unique, are of
relatively limited distribution, or are of particular value to wildlife. Sources used for
determination of sensitive biological resources are as follows: wildlife — U.S. Fish and
Wildlife Service (USFWS 1989, 1991), California Natural Diversity Data Base (CNDDB),
California Department of Fish and Game (CDFG 1980, 1986), Remsen (1978), McGurty
(1980); plants - USFWS (1990, 1993), CDFG (1987), CNDDB, and Skinner and Pavlik
(1995); and habitats - CNDDB.
3.3.1 Sensitive Plant Species
No sensitive plant species were observed on the site.
3.3.2 Sensitive Wildlife Species
No sensitive wildlife species were observed onsite, however, the California gnatcatcher
(Polioptila californicd) could be present hi the coastal sage scrub habitat at the eastern edge
of the property. A focused, protocol survey for this species was not conducted.
3.3.3 Sensitive Habitats and Wildlife Corridors
HABITATS
Sensitive habitats are those that 1) are considered rare within the region, 2) support sensitive
plant and/or wildlife species, or 3) function as corridors for wildlife movement. Onsite,
these include the coastal sage scrub, disturbed southern willow scrub, and the associated
jurisdiction wetlands or "waters of the U.S." adjacent to the basin.
'-
Mr. Gregg Linhoff 30 August 1998
Re: Biological Reconnaissance Survey For the Thompson Property Pg. 10
Regionally, coastal sage scrub provides habitat for numerous sensitive plant and wildlife
species. Animals confined primarily to this habitat include California gnatcatcher, cactus
wren, orange-throated whiptail, and San Diego horned lizard. Sensitive plants characteristic
of coastal sage scrub include San Diego barrel cactus, ashy spike-moss, and California
adolphia. This habitat type has been reduced by about 70% of its former coverage hi the
County as a result of agriculture, urbanization, and other development.
Wetlands, such as southern willow scrub, are recognized as important wildlife habitat.
These areas provide a variety of resources that are unavailable in upland areas during the
drier tunes of the year. Because these habitats are considered wetlands, they are under the
jurisdiction of the U.S. Army Corps of Engineers (as wetlands or "waters of the U.S.") and
the California Department of Fish and Game (as "wetlands"). Local and regional resource
agencies have a rigid policy of no net loss of quantity or quality of wetland habitat.
Intermittent streams, such as dry washes and narrow gullies, also may fall under the
jurisdiction of the U.S. Army Corps of Engineers as waters of the U.S.
CORRIDORS
Due to the location of the property within a residential development and agricultural area,
little corridor potential exists. The habitat located at the eastern edge of the property
connects to additional native habitat offsite to the east, however, the habitat ends at Aviara
Parkway. The patch of coastal sage scrub is a small-sized patch connected to a medium-
sized patch and although it varies hi quality, still provides important coastal sage scrub
resources for providing a possibly territory and possible stepping-stone movement corridor
for sensitive species such as the California gnatcatcher. Unfortunately, the patch of habitat
does not connect to additional habitat to form a corridor to aid hi providing for dispersal of
wildlife species hi the area.
5.0 REGULATORY PERMIT REQUIREMENTS
5.1 Coastal,Sage Scrub Impacts
Based on this reconnaissance survey and the staking that was done along the edge of the
coastal sage scrub habitat within the proposed development, no mitigation will be required
because no impacts will occur to coastal sage scrub.
5.2 Wetland or "Waters" Impacts
Based on the preliminary site development plans, the southern willow scrub habitat will be
impacted. Thus, it is anticipated that the 0.10 acre patch of southern willow scrub will be
impacted. Permits from the ACOE, CDFG, and California Regional Water Quality Control
Board (RWQCB) are required. Mitigation is required for the impact.
Mr. Gregg Linhoff 30 August 1998
Re: Biological Reconnaissance Survey For the Thompson Property Pg. 11
The discharge of dredge or fill material (temporary or permanently) into areas delineated as
wetlands or "waters of the United States" requires authorization from the ACOE pursuant to
Section 404 of the Clean Water Act. "Waters of the U.S." as defined in CFR 328.2 includes
all waters or tributaries to waters, including wetlands, streams, dry washes, seasonal
drainages, and other aquatic habitats. Activities that involve regulated discharge of dredge or
fill material include grading, placing of riprap for erosion control, pouring concrete, laying
sod, and stockpiling excavated material. Activities that generally do not involve regulated
discharge, if performed in a manner to avoid discharge, include driving pilings and some
methods of vegetation clearing.
sThe ACOE has 36 nationwide or general permits (NWPs) that pre-authorize specific minor
discharges if less than one-third of an acre. Generally, use of these NWPs does not require
review by:the ACOE or other federal agencies. If endangered species or significant cultural
resources occur on the property and are not adequately mitigated, the activity is not
considered pre-authorized and ACOE has the discretionary authority to require an individual
permit. The individual permit process (for a Section 404) involves an alternatives analysis
and public comment on the proposed activity and can last 180 days or longer. Based on the
small size of the riparian habitat, it is likely that no permit would be required and the only
requirement from the ACOE is that a pre-construction notification letter be submitted to
describe the activity and impact.
Prior to project implementation, a Section 401 water quality certification (or waiver) must be
obtained from the California Regional Water Quality Control Board (RWQCB), and the
ACOE should be notified hi writing for concurrence that any proposed fill is authorized.
The RWQCB requires the incorporation of features into the grading and development plan
that ensure that the project will not adversely affect water quality. The types of features
typically incorporated into projects include desiltation basins, grease traps, revegetation of
cut and fill slopes, and the use of sand bags and hay bales to inhibit erosion and siltation.
All of these are considered features of a "Best Management Practices" approach.
For streambed impacts, an application for a CDFG Section 1603 Streambed Alteration
Agreement can be submitted only after an environmental impact report or negative
declaration has been certified, or under a categorical exemption. The CDFG generally
requires that any impacts to streambeds or adjacent riparian habitats be mitigated at a ratio of
a minimum of 1:1 by area. Application for a Streambed Alteration Agreement must be
accompanied by certified CEQA documentation for the project and a wetland mitigation and
monitoring plan, if applicable. It normally takes 30 days for the CDFG to process a 1603
application. Based on the reconnaissance survey of the property, the 0.10 acre patch of
southern willow scrub is within the jurisdiction of the CDFG. Impacts to the patch require
mitigation. Due to the small size, isolated nature and relatively disturbed quality of the
habitat, it is anticipated that mitigation will be at a 2:1 ratio.
Mr. Gregg Linhoff 30 August 1998
Re: Biological Reconnaissance Survey For the Thompson Property Pg. 12
The impact to the waters of the U.S. and southern willow scrub may be mitigated onsite if
suitable acreage is available. A total mitigation acreage for southern willow scrub is likely to
be 0.20 acre. This acreage may change after the applications have been submitted to the
resource agencies. The project design includes open space lots in lot 182 and 170 to function
as detention basins. These basins, if the acreage is suitable, should be able to accommodate
the mitigation for the impact to southern willow scrub.
Please feel free to contact me at (760) 942-5147 with questions or if you require additional
information. I look forward to working with you on this project. We would be able to
respond immediately to your needs for preparing the required documents.
Very truly yours,
DUDEK & ASSOCIATES, INC.
Anita M. Hay wo
Biologist V
cc: Melissa Allen, Jack Henthorn & Associates
ACKNOWLEDGMENTS
This report was prepared by Anita M. Hay worth, Ph.D. Martie demons prepared the
graphic illustrations.
LITERATURE CITED
American Ornithologists' Union. 1983. The check-list of North American birds, 6th
edition. Allen Press, Lawrence, Kansas.
American Ornithologists' Union. 1989. Thirty-seventh supplement to the American
Ornithologists' Union check-list of North American birds. The Auk 106:532-538.
Beauchamp, R. M. 1986. A flora of San Diego County, California. Sweetwater Press,
National City, California. 241 pp.
Bond, S. I. 1977. An annotated list of the mammals of San Diego County, California.
Trans. San Diego Soc. Nat. Hist. 18(14):229-248.
Mr. Gregg Linhoff 30 August 1998
Re: Biological Reconnaissance Survey For the Thompson Property Pg. 13
California Department of Fish and Game. 1980. At the crossroads: A report on the status
of California's endangered and rare fish and wildlife. State of California Resources
Agency, Sacramento. California.
California Department of Fish and Game. 1986. Endangered, rare, and threatened animals
of California. State of California Resources Agency, Sacramento, California.
California Department of Fish and Game. 1987. Designated endangered or rare plants.
Summary list from Section 1904 Fish and Game Code (Native Plant Protection Act).
State of California Resources Agency, Sacramento, California.
Everett, W. T. 1979. Threatened, declining, and sensitive bird species in San Diego
County. San Diego Audubon Society Sketches 29:2-3.
Hickman, J. C. 1993. The Jepson manual: higher plant of California. University of
California Press, Berkeley. 1400 pp.
Holland, R. F. 1986. Preliminary descriptions of the terrestrial natural communities of
California. Nongame-Heritage Program, California Department of Fish and Game.
Jones, J. K., Jr., D. C. Carter, H. H. Genoways, R. S. Hoffman, and D. W. Rice. 1992.
Revised checklist of North American mammals north of Mexico. Occasional Papers
of the Museum of Texas Tech University, no. 148.
McGurty, B. M. 1980. Survey and status of endangered and threatened species of reptiles
natively occurring in San Diego, California. San Diego Herpetological Society.
Munz, P. 1974. A flora of southern California. University of California Press, Berkeley,
California. 1086 pp.
Reed, P. B. 1988. National list of plant species that occur in wetlands: California (Region
0). U.S. Fish and Wildlife Service Biological Report 88 (26.10).
Remsen, J. V. 1978. Bird species of special concern in California: An annotated list of
declining or vulnerable bird species. Nongame Wildlife Investigations, Wildlife
Management Branch, California Department of Fish and Game. Administrative
Report No. 78-1.
Skinner, M. W. and B. M. Pavlik. 1994. California Native Plant Society's inventory of
rare and endangered vascular plants of California. Special Publication No. 1 (5th
Edition), California Native Plant Society, Sacramento, California. 338 pp.
Mr. Gregg Unhoff 30 August 1998
Re: Biological Reconnaissance Survey For the Thompson Property Pg. 14
Stebbins, R. C. 1985. A field guide to western reptiles and amphibians. Houghton Mifflin
Co., Boston. 336pp.
Unitt, P. A. 1984. Birds of San Diego County. Memoir 13, San Diego Soc. Nat. Hist.
276 pp.
United States Fish and Wildlife Service (USFWS). 1989. Federal Register, Part 4,
Endangered and Threatened Wildlife and Plants; Animal Notice of Review. 50 CFR Part 17.
Department of the Interior.
United States Fish and Wildlife Service (USFWS). 1990. Federal Register, Part 4,
Endangered and Threatened Wildlife and Plants; Review of Plant Taxa for Listing as
Endangered or Threatened Species, Notice of Review. 50 CFR Part 17. Department of the
Interior.
United States Fish and Wildlife Service (USFWS). 1991. Federal Register, Part 8,
Endangered and Threatened Wildlife and Plants; Animal Candidate Review for Listing as
Endangered or Threatened Species, Proposed Rule. 50 CFR Part 17. Department of the
Interior.
United States Fish and Wildlife Service (USFWS). 1993. Federal Register, Part 8,
Endangered and Threatened Wildlife and Plants; Review of Plant Taxa for Listing as
Endangered or Threatened Species. 50 CFR Part 17. Vol. 58. No. 188. Department of the
Interior.
U.S. Army Corps of Engineers. 1987. Corps of Engineers Wetlands Delineation Manual,
Technical Report Y-87-1, U.S. Army Corps of Engineers Waterways Experiment
Station, Vicksburg, Mississippi.
APPENDICES
DUDEK
& ASSOCIATES, INC.
Engineering, Planning,
Environmental Sciences and
Management Services
Corporate Office:
605 Third Street
Encinitas, California 92024
. , . _nn!: 3 ZuOO
760.942.5147
Fax 760.632.0164
2755-01
Tmm, for Complex Projects
3 October 2000
Kathy Baker
Standard Pacific Homes
5750 Fleet Street, Suite 200
Carlsbad, Ca 92008
RE: BIOLOGICAL SURVEY OF THE THOMPSON PROPERTY,
CITY OF CARLSBAD
Dear Ms. Baker:
A biological reconnaissance survey was conducted of the approximately 82.2-acre Thompson
property situated in the City of Carlsbad in the western portion of San Diego County,
California. A total of 77.7 acres of the property are proposed for the development, the
balance of which is currently dedicated to the City of Carlsbad in the form of Poinsettia Lane
and a small portion of Rose Lane. The property is located west of El Camino Real, adjacent
to Poinsettia Lane and Aviara Parkway, east of Interstate 5, south of Palomar Airport Road
and north of Batiquitos Lagoon (Figures 1 and 2}. The property is surrounded by agriculture
and greenhouse production or residential development with a strip of native vegetation
located to the east. Biological surveys of the property were conducted in December 1997 and
June 1998 by Dudek & Associates (DUDEK) to assess the existing conditions of the biological
resources and stake or flag native vegetation that may be present. The surveys augmented
the existing data base accumulated through previous survey work (e.g., SAND AC 1994). The
purpose of the visit was to identify the habitat types present, and identify constraints to
development of the property. A supplemental site visit was conducted in October 2000 to
confirm the mapping described in this letter and photograph the existing patch of willows.
1.0 METHODS AND SURVEY LIMITATIONS
Data regarding biological resources present on the project site were obtained through a review
of pertinent literature and through field reconnaissance.
Biological Survey • Thompson Property
1.1 Literature Review
Biological resources present or potentially present on the Thompson property were identified
through a variety of environmental studies and reports including the Multiple Habitat
Conservation Program (SANDAC, 1997) and draft Habitat Management Plan for Natural
Communities in the City of Carlsbad (December 1, 1997). General information regarding
wildlife species present in the region was obtained from Unitt (1984) for birds, Bond (1977)
for mammals, and Stebbins (1984) for reptiles and amphibians.
1.2 Field Reconnaissance
Biological surveys of the Thompson property were conducted by DUDEK biologist Anita M.
Hayworth, Ph.D. on 29 and 30 December 1997. Vegetation staking or flagging took place on
June 11,1998. All surveys were conducted by foot under favorable weather conditions, and
all areas of the property were visited and inventoried for biotic components. The time of the
surveys was generally between 0800 and 1200 for approximately 2 to 3 hours for each visit.
Weather conditions were typically mild with temperatures ranging from 60 to 70 °F,
windspeed from 1-8 MPH, and skies clear. A brief visit was made on October 4, 2000 to
confirm the results described in this letter and take photographs.
1.2.1 Resource Mapping
Plant communities were mapped in the field onto a 100-scale (1"=100') topography map of
the site. Plant community classifications used in this report follow Holland (1986), with
modifications to accommodate the lack of conformity of the observed communities to those
of Holland. Locations of rare or sensitive plant and wildlife species also were mapped.
During the reconnaissance survey of the property, the area along the eastern property
boundary adjacent to the area proposed for development was delimited at the edge of the
coastal sage scrub vegetation. The delimiting was placed appropriately at the edge of the
coastal sage scrub vegetation by either tying a strip of flagging in the shrub at the edge of the
native vegetation or to the fenceline which served as a delimiter for the boundary of the
native vegetation and the agriculture fields. The flagged area was then surveyed by a civil
engineer and the survey line was provided to DUDEK as a digital AutoCadd file. Thus,
provided that no encroachment is made beyond the staked line, no impacts to coastal sage
scrub due to the proposed development would occur.
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1.2.2 Flora
All plant species encountered during the field surveys were identified and recorded. Species
that could not be identified immediately in the field were brought back into the laboratory
for further investigation. Latin and common names of plants used in this report follow the
Jepson Manual (Hickman 1993). Where not listed in Hickman (1993), common names are
taken from Beauchamp (1986).
1.2.3 Fauna
Wildlife species detected during field surveys by sight, calls, tracks, scat, or other sign were
recorded. Although daytime surveys result in the greatest number and highest diversity of
wildlife sightings (because most birds are diurnal), many species of mammals are not
observable during the day because of their nocturnal habits. In addition, many species of
reptiles have extremely secretive habits, and hence, are difficult to detect as well.
Binoculars (10 x 50 power) were used to aid in the identification of observed animals. Latin
and common names used in this report follow Stebbins (1985) for reptiles and amphibians,
American Ornithologists' Union (1983,1989) for birds, and Jones et al. (1992) for mammals.
1.2.4 Sensitive Biological Resources
Sensitive biological resources are those defined as follows: (1) species that have been given
special recognition by federal, state, or local conservation agencies and organizations due to
limited, declining, or threatened population sizes and (2) habitat areas or plant communities
that are unique, are of relatively limited distribution, or are of particular value to wildlife.
During the field work a special effort was made to survey more thoroughly those areas
suspected to support sensitive resources. Most potentially occurring sensitive plants are
perennials that can be detected at any time of year if present in substantial numbers.
1.3 Survey Limitations
Limitations of the surveys include a diurnal bias and seasonal constraints as well as the focus
of the survey being on a reconnaissance level of mapping and identification. For convenience
and maximum visibility, surveys were conducted during the daytime hours. Although
diurnal surveys maximize the number of observations of birds, which represent the largest
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component of the vertebrate fauna, they usually result in few observations of mammals,
many of which are active primarily at night. No mammal trapping was conducted. No
focused surveys were conducted for sensitive species.
Many species of reptiles and amphibians are secretive in their habitats and are rarely observed
using normal survey techniques. No drift lines or pit fall traps were employed.
2.0 PHYSICAL CHARACTERISTICS
2.1 Site Description
Land use within the Thompson property is currently predominantly active agriculture,
including greenhouse production of plant material. Much of the property appears to have
been graded in the past. The property is surrounded by existing or planned developed on
three sides. Along the eastern boundary, the property is adjacent to open space along the
northern two-thirds of the eastern property line. The property is situated near the north-
central portion of the USGS 7.5 minute Encinitas quadrangle.
The topography onsite consists of predominantly flat terrain with an east-facing steep slope
of native vegetation along the eastern property boundary. Poinsettia Lane, a four-lane
circulation element, bisects the northern portion of the property in an east-west direction.
Elevations range from approximately 185 feet above mean sea level (AMSL) to approximately
300 feet AMSL.
3.0 RESULTS
3.1 Botany - Plant Communities and Floral Diversity
Based on species composition and general physiognomy, three plant communities (or habitat
types) were identified within the Thompson property: coastal sage scrub, southern willow
scrub, and disturbed habitat in the form of active agriculture, developed land, and landscape
plantings. The existing plant communities are described below and their distribution onsite
is presented in Figure 3. Table 1 presents the acreage of each vegetation type present onsite.
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TABLE" 1
Existing Plant Community Acreages
• • "••.' • " • . "•-..• ' " •
Plant Community (abbreviation used on map)
Coastal Sage Scrub (CSS)
Southern Willow Scrub (SWS)
Disturbed Habitat (DH)
TOTALS
Existing Acreage
1.8
0.1
80.3
82.2
3.1.1 Coastal Sage Scrub
Coastal sage scrub is a native plant community characterized by a variety of soft, low,
aromatic, drought-deciduous shrubs, such as California sagebrush (Artemisia californica), flat-
top buckwheat (Eriogonum fasciculatum), California bush sunflower (Encelia californica}, and
sages (Salvia spp.), with scattered evergreen shrubs, including lemonadeberry (Rhus
integrifolia), laurel sumac (Malosma laurina), and toyon (Heteromeles arbutifolia}. It typically
develops on south-facing slopes and other xeric situations. Coastal sage scrub is considered
a sensitive habitat type because of its depleted nature and the large number of sensitive plant
and wildlife species that it supports. Coastal sage scrub is the focus of the present State of
California's Natural Communities Conservation Program (NCCP).
Onsite, coastal sage scrub occurs along the eastern property line as a narrow band of habitat
that continues offsite within the open space located between the property and Aviara
Parkway. A total of 1.8 acres of coastal sage scrub is located onsite. The habitat is very
diverse and is dominated by California sagebrush and includes flat-top buckwheat, California
bush sunflower, black sage (Salvia mellifera), laurel sumac, lemonadeberry, prickly pear
(Opuntia linoralis), and other plant species. Patches of eucalyptus woodland occur within the
open space area adjacent to the coastal sage scrub.
3.1.2 Southern Willow Scrub
Holland (1986) describes southern willow scrub as "dense, broadleafed, winter-deciduous
riparian thickets dominated by several species of [willows] Salix, with scattered emergent
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[Fremont cottonwood] Populus fremontii and [western sycamore] Platanus racemosa." The
understory is usually depauperate owing to the dense canopy.
Within the property there is one patch of riparian habitat that are dominated by arroyo
willow (Salix lasiolepis) and red willow (Salix laevigata) with tamarisk (Tamarix sp.) and giant
cane (Arundo donax) also present. The patch of southern willow scrub is located along the
western property boundary adjacent to the paved access road to the site. It appears to be
located within a manmade water retention or desiltation basin. Non-native grasses are
present along the edges of the basin which would likely also be considered the jurisdiction
of the regulating agencies. A total of 0.10 acre of southern willow scrub is located within the
basin. Although the southern willow scrub habitat area is moderately disturbed, it is
considered sensitive because it represents wetland habitat that is regulated by the U.S. Army
Corps of Engineers and the California Department of Fish and Game.
3.1.3 Disturbed Habitat
For purposes of this document, disturbed habitat includes areas in agriculture production,
developed areas that include paved roads and existing houses, pavement and buildings, and
landscaped areas along the manufactured slopes of Poinsettia Lane and the housing
developments along the property boundaries. Major portions of the property (80.3 acres) are
comprised of disturbed habitat.
3.1.4 Floral Diversity
A total of 39 species of vascular plants were recorded from the site (Appendix A). The
relatively low floral diversity of the area is the result of the large amount of disturbed habitat
in the form of agricultural production onsite.
3.2 Zoology - Wildlife Diversity
Thirteen species of birds were observed during the surveys. The most commonly
encountered residents in project area include California towhee (Pipilo crissalis), house finch
(Carpodacus mexicanus) and scrub jay (Aphelocoma coerulescens). Because the document was
prepared as a reconnaissance survey, it is likely that not all bird species present within the
property were detected.
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One mammal species, California ground squirrel (Spermophilus heecheyi), was observed onsite.
Two reptile species were observed onsite.
3.3 Sensitive Biological Resources
The following resources are discussed in this section: (1) plant and animal species present in
the project vicinity that are given special recognition by federal, state, or local conservation
agencies and organizations owing to declining, limited, or threatened populations, that are
the results, in most cases, of habitat reduction; and (2) habitat areas that are unique, are of
relatively limited distribution, or are of particular value to wildlife. Sources used for
determination of sensitive biological resources are as follows: wildlife -- U.S. Fish and
Wildlife Service (USFWS 1989, 1991), California Natural Diversity Data Base (CNDDB),
California Department of Fish and Game (CDFG 1980, 1986), Remsen (1978), McGurty
(1980); plants -- USFWS (1990,1993), CDFG (1987), CNDDB, and Skinner and Pavlik (1995);
and habitats - CNDDB.
3.3.1 Sensitive Plant Species
No sensitive plant species were observed on the site.
3.3.2 Sensitive Wildlife Species
No sensitive wildlife species were observed onsite, however, the California gnatcatcher
(Polioptila. californica) could be present in the coastal sage scrub habitat at the eastern edge of
the property. A focused, protocol survey for this species was not conducted.
3.3.3 Sensitive Habitats and Wildlife Corridors
Habitats. Sensitive habitats are those that 1) are considered rare within the region, 2)
support sensitive plant and/or wildlife species, or 3) function as corridors for wildlife
movement. Onsite, these include the coastal sage scrub, disturbed southern willow
scrub, and the associated jurisdiction wetlands or "waters of the U.S." adjacent to the
basin.
Regionally, coastal sage scrub provides habitat for numerous sensitive plant and
wildlife species. Animals confined primarily to this habitat include California
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gnatcatcher, cactus wren, orange-throated whiptail, and San Diego horned lizard.
Sensitive plants characteristic of coastal sage scrub include San Diego barrel cactus,
ashy spike-moss, and California adolphia. This habitat type has been reduced by
about 70% of its former coverage in the County as a result of agriculture,
urbanization, and other development.
Wetlands, such as southern willow scrub, are recognized as important wildlife habitat.
These areas provide a variety of resources that are unavailable in upland areas during
the drier times of the year. Because these habitats are considered wetlands, they are
under the jurisdiction of the U.S. Army Corps of Engineers (as wetlands or "waters of
the U.S.") and the California Department of Fish and Game (as "wetlands"). Local and
regional resource agencies have a rigid policy of no net loss of quantity or quality of
wetland habitat. Intermittent streams, such as dry washes and narrow gullies, also
may fall under the jurisdiction of the U.S. Army Corps of Engineers as waters of the
U.S.
Corridors. Due to the location of the property within a residential development and
agricultural area, little corridor potential exists. The habitat located at the eastern
edge of the property connects to additional native habitat offsite to the east, however,
the habitat ends at Aviara Parkway. The patch of coastal sage scrub is a small-sized
patch connected to a medium-sized patch and although it varies in quality, still
provides important coastal sage scrub resources for providing a possibly territory and
possible stepping-stone movement corridor for sensitive species such as the California
gnatcatcher. Unfortunately, the patch of habitat does not connect to additional
habitat to form a corridor to aid in providing for dispersal of wildlife species in the
area.
5.0 REGULATORY PERMIT REQUIREMENTS
5.1 Coastal Sage Scrub Impacts
Based on this reconnaissance survey and the staking that was done along the edge of the
coastal sage scrub habitat within the proposed development, no mitigation will be required
because no impacts will occur to coastal sage scrub.
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5.2 Wetland or "Waters" Impacts
Based on the preliminary site development plans, the southern willow scrub habitat will be
impacted. Thus, it is anticipated that the 0.1 acre patch of southern willow scrub will be
impacted. Permits from the ACOE, CDFG, and California Regional Water Quality Control
Board (RWQCB) are required. Although the patch of willow habitat is extremely small, is
very isolated from other native habitat, either upland or wetland, and is present due to the
agriculture operation onsite, it is still regulated by the resource agencies. Mitigation is
required for the impact.
The discharge of dredge or fill material (temporary or permanently) into areas delineated as
wetlands or "waters of the United States" requires authorization from the ACOE pursuant
to Section 404 of the Clean Water Act. "Waters of the U.S." as defined in CFR 328.2 includes
all waters or tributaries to waters, including wetlands, streams, dry washes, seasonal
drainages, and other aquatic habitats. Activities that involve regulated discharge of dredge
or fill material include grading, placing of riprap for erosion control, pouring concrete, laying
sod, and stockpiling excavated material. Activities that generally do not involve regulated
discharge, if performed in a manner to avoid discharge, include driving pilings and some
methods of vegetation clearing.
The ACOE has 36 nationwide or general permits (NWPs) that pre-authorize specific minor
discharges if less than one-third of an acre. Generally, use of these NWPs does not require
review by the ACOE or other federal agencies. If endangered species or significant cultural
resources occur on the property and are not adequately mitigated, the activity is not
considered pre-authorized and ACOE has the discretionary authority to require an individual
permit. The individual permit process (for a Section 404) involves an alternatives analysis
and public comment on the proposed activity and can last 180 days or longer. Based on the
small size of the riparian habitat, it is likely that no permit would be required and the only
requirement from the ACOE is that a pre-construction notification letter be submitted to
describe the activity and impact.
Prior to project implementation, a Section 401 water quality certification (or waiver) must
be obtained from the California Regional Water Quality Control Board (RWQCB), and the
ACOE should be notified in writing for concurrence that any proposed fill is authorized. The
RWQCB requires the incorporation of features into the grading and development plan that
ensure that the project will not adversely affect water quality. The types of features typically
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incorporated into projects include desiltation basins, grease traps, revegetation of cut and fill
slopes, and the use of sand bags and hay bales to inhibit erosion and siltation. All of these
are considered features of a "Best Management Practices" approach.
For streambed impacts, an application for a CDFG Section 1603 Streambed Alteration
Agreement can be submitted only after an environmental impact report or negative
declaration has been certified, or under a categorical exemption. The CDFG generally requires
that any impacts to streambeds or adjacent riparian habitats be mitigated at a ratio of a
minimum of 1:1 by area. Application for a Streambed Alteration Agreement must be
accompanied by certified CEQA documentation for the proj ect and a wetland mitigation and
monitoring plan, if applicable. It normally takes 30 days for the CDFG to process a 1603
application. Based on the reconnaissance survey of the property, the 0.1-acre patch of
southern willow scrub is within the jurisdiction of the CDFG. Impacts to the patch require
mitigation. Due to the small size, isolated nature and relatively disturbed quality of the
habitat, it is anticipated that mitigation will be at a 2:1 ratio.
The impact to the waters of the U.S. and southern willow scrub may be mitigated onsite if
suitable acreage is available. A total mitigation acreage for southern willow scrub is likely to
be 0.20 acre. This acreage may change after the applications have been submitted to the
resource agencies. The project design includes open space onsite to function as detention
basins. These basins, if the acreage is suitable, should be able to accommodate the mitigation
for the impact to southern willow scrub. Table 2 below provides a suggested plant list for use
in the open space mitigation area.
TABLE 2
POTENTIAL CONTAINER STOCK, CUTTINGS, AND SEED MIX
FOR RIPARIAN REVEGETATION
Container Stock (optional)
Populus fremontii - Fremont cottonwood
Platanus racemosa - western sycamore
Cuttings
Salix lasiolepis - arroyo willow
Salix gooddingii - southwestern willow
Salix hindsiana - sandbar willow
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Seed Mix
Ambrosia, psilostachya - western ragweed
Artemisia douglasiana - mugwort
Artemisia palmeri - San Diego sagewort
Baccharis salicifolia - mule fat
Eleocharis macrostachya - pale spike-rush
Isocoma menziesii - coast goldenbush
Iva hayesiana - San Diego marsh-elder
Juncus dubius - mariposa rush
Frankenia salina - Alkali-heath
Distichlis spicata - salt grass
Please feel free to contact me at (760) 942-5147 with questions or if you require additional
information. I look forward to working with you on this project. We would be able to
respond immediately to your needs for preparing the required documents.
Very truly yours,
DUDEK & ASSOCIATES, INC.
Anita M. Hayworth, Pj
Biologist V
AMH/tsf
Attachment: Figures 1, Regional Map
figure 2, Vicinity Map
figure 3, Biological Resources Map
cc: Jack Henthorn, Jack Henthorn & Associates
ACKNOWLEDGMENTS
This report was prepared by Anita M. Hayworth, Ph.D. Martie demons prepared the
graphic illustrations.
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LITERATURE CITED
American Ornithologists' Union. 1983. The check-list of North American birds, 6th edition.
Allen Press, Lawrence, Kansas.
American Ornithologists' Union. 1989. Thirty-seventh supplement to the American
Ornithologists' Union check-list of North American birds. The Auk 106:532-538.
Beauchamp, R. M. 1986. A flora of San Diego County, California. Sweetwater Press,
National City, California. 241 pp.
Bond, S. I. 1977. An annotated list of the mammals of San Diego County, California. Trans.
San Diego Soc. Nat. Hist. 18(14) :229-248.
California Department of Fish and Game. 1980. At the crossroads: A report on the status
of California's endangered and rare fish and wildlife. State of California Resources
Agency, Sacramento. California.
California Department of Fish and Game. 1986. Endangered, rare, and threatened animals
of California. State of California Resources Agency, Sacramento, California.
California Department of Fish and Game. 1987. Designated endangered or rare plants.
Summary list from Section 1904 Fish and Game Code (Native Plant Protection Act).
State of California Resources Agency, Sacramento, California.
Everett, W. T. 1979. Threatened, declining, and sensitive bird species in San Diego County.
San Diego Audubon Society Sketches 29:2-3.
Hickman, J. C. 1993. The Jepson manual: higher plant of California. University of
California Press, Berkeley. 1400 pp.
Holland, R. F. 1986. Preliminary descriptions of the terrestrial natural communities of
California. Nongame-Heritage Program, California Department of Fish and Game.
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Biological Survey • Thompson Property
Jones, J. K., Jr., D. C. Carter, H. H. Genoways, R. S. Hoffman, and D. W. Rice. 1992. Revised
checklist of North American mammals north of Mexico. Occasional Papers of the
Museum of Texas Tech University, no. 148.
McGurty, B. M. 1980. Survey and status of endangered and threatened species of reptiles
natively occurring in San Diego, California. San Diego Herpetological Society.
Munz, P. 1974. A flora of southern California. University of California Press, Berkeley,
California. 1086pp.
Reed, P. B. 1988. National list of plant species that occur in wetlands: California (Region
0). U.S. Fish and Wildlife Service Biological Report 88 (26.10).
Remsen, J. V. 1978. Bird species of special concern in California: An annotated list of
declining or vulnerable bird species. Nongame Wildlife Investigations, Wildlife
Management Branch, California Department of Fish and Game. Administrative
Report No. 78-1.
Skinner, M. W. and B. M. Pavlik. 1994. California Native Plant Society's inventory of rare
and endangered vascular plants of California. Special Publication No. 1 (5th Edition),
California Native Plant Society, Sacramento, California. 338 pp.
Stebbins, R. C. 1985. A field guide to western reptiles and amphibians. Houghton Mifflin
Co., Boston. 336 pp.
Unitt, P. A. 1984. Birds of San Diego County. Memoir 13, San Diego Soc. Nat. Hist. 276
pp.
United States Fish and Wildlife Service (USFWS). 1989. Federal Register, Part 4,
Endangered and Threatened Wildlife and Plants; Animal Notice of Review. 50 CFR
Part 17. Department of the Interior.
United States Fish and Wildlife Service (USFWS). 1990. Federal Register, Part 4, Endangered
and Threatened Wildlife and Plants; Review of Plant Taxa for Listing as Endangered
or Threatened Species, Notice of Review. 50 CFR Part 17. Department of the
Interior.
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United States Fish and Wildlife Service (USFWS). 1991. Federal Register, Part 8, Endangered
and Threatened Wildlife and Plants; Animal Candidate Review for Listing as
Endangered or Threatened Species, Proposed Rule. 50 CFR Part 17. Department of
the Interior.
United States Fish and Wildlife Service (USFWS). 1993. Federal Register, Part 8, Endangered
and Threatened Wildlife and Plants; Review of Plant Taxa for Listing as Endangered
or Threatened Species. 50 CFR Part 17. Vol.58. No. 188. Department of the Interior.
U.S. Army Corps of Engineers. 1987. Corps of Engineers Wetlands Delineation Manual,
Technical Report Y-87-1, U.S. Army Corps of Engineers Waterways Experiment
Station, Vicksburg, Mississippi.
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APPENDICES
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APPENDIX A
VASCULAR PLANT SPECIES OBSERVED
ON THE PROJECT SITE
ANGIOSPERMAE (DICOTYLEDONES)
ANACARDIACEAE - SUMAC FAMILY
Rhus integrifolia - lemonadeberry
Malosma laurina - laurel sumac
APIACEAE - CARROT FAMILY
* Foeniculum vulgare - sweet fennel
ASTERACEAE - SUNFLOWER FAMILY
Artemisia californica - coastal sagebrush
Baccharis pilularis ssp. consanguinea - coyote brush
* Carduus pycnocephalus - Italian thistle
* Centaurea melitensis - tocalote
* Chrysanthemum coronarium - garland chrysanthemum
* Conyza canadensis - common horseweed
Encelia californica - California bush sunflower
Hemizonia fasciculata - fascicled tarweed
Heterotheca grandiflora - telegraph weed
BRASSICACEAE - MUSTARD FAMILY
* Brassica nigra - black mustard
* Raphanus sativus - wild radish
CACTACEAE - CACTUS FAMILY
Opuntia littoralis - coastal prickly-pear
CHENOPODIACEAE - GOOSEFOOT FAMILY
* Salsola tragus - Russian-thistle
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FABACEAE - PEA FAMILY
Lotus scoparius - deerweed
LAMIACEAE - MINT FAMILY
Salvia mellifera - black sage
MALVACEAE - MALLOW FAMILY
Malocothamnus fasciculatus - mesa bushmallow
MYRTACEAE - MYRTLE FAMILY
* Eucalyptus sp. - eucalyptus
POLYGONACEAE - BUCKWHEAT FAMILY
Eriogonutn fasciculatum - flat-top buckwheat
PRIMULACEAE - PRIMROSE FAMILY
* Anagallis arvensis - scarlet pimpernel
ROSACEAE - ROSE FAMILY
Heterotneles arbutifolia - toyon
SAURURACEAE - LIZARD-TAIL FAMILY
Anemopsis californica - yerba mansa
Eriodictyon crassifolia - yerba santa
SCROPHULARIACEAE - FIGWORT FAMILY
Mimulus aurantiacus - bush monkeyflower
SALICACEAE - WILLOW FAMILY
Salix lasiolepis - arroyo willow
Salix laevigata - red willow
SOLANACEAE - NIGHTSHADE FAMILY
* Nicotiana glauca - tree tobacco
TAMARICACEAE - TAMARISK FAMILY
* Tamarix sp. - tamarisk
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ANGIOSPERMAE (MONOCOTYLEDONES)
LILIACEAE - LILY FAMILY
Yucca whippki - our lord's candle
POACEAE - GRASS FAMILY
* Arundo donax - giant cane
* Avena barbata - slender oat
* Avena fatua - wild oats
* Brotnus diandrus - ripgut grass
* Bromus hordeaceus - soft chess
* Bromus madritensis ssp. rubens - foxtail chess
* Conaderia jubata - Atacama pampas grass
* Lolium muhiflorum - English ryegrass
denotes non-native, introduced species
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APPENDIX B
WILDLIFE SPECIES OBSERVED OR
DETECTED ON THE PROJECT SITE
REPTILES
IGUANIDAE - IGUANID LIZARDS
Uta stansburiana elegans - side-blotched lizard
Sceloporus occidentalis longipes - Great Basin fence lizard
BIRDS
COLUMBIDAE - PIGEONS & DOVES
Zenaida macroura - mourning dove
TROCHILIDAE - HUMMINGBIRDS
Calypte anna - Anna's hummingbird
TYRANNIDAE - TYRANT FLYCATCHERS
Sayornis nigricans - black phoebe
Tyrannus verticalis - western kingbird
CORVIDAE - JAYS & CROWS
Aphelocoma coerulescens - scrub jay
Corvus corax - common raven
MIMIDAE - THRASHERS
Mimus polyglottos - northern mockingbird
AEGITHALIDAE - BUSHTITS
Psahriparus minimus - bushtit
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Biological Survey • Thompson Property
TROGLODYTIDAE - WRENS
Thryomanes bewickii - Bewick's wren
EMBERIZIDAE - WOOD WARBLERS, TANAGERS, BUNTINGS & BLACKBIRDS
Pipilo crissalis - California towhee
Sturnella ne.gle.cia - western meadowlark
FRINGILLIDAE - FINCHES
Carpodacus mexicanus - house finch
Carduelis psahria - lesser goldfinch
MAMMALS
SCIURIDAE - SQUIRRELS
Syermophilus beecheyi - California ground squirrel (obs.)
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Biological Survey 4- Thompson Property
Federal (1993)
Endangered:
Threatened:
Category 1:
Category 2:
Category 3
APPENDIX C
SPECIES SENSITIVITY CATEGORIES
Taxa threatened throughout all or a significant portion of their range.
Taxa likely to become endangered in the foreseeable future.
Taxa for which the USFWS currently has on file substantial
information on biological vulnerability and threat(s) to support the
appropriateness of proposing to list them as endangered or threatened
species.
Taxa for which information now in possession of the USFWS indicates
that proposing to list them as endangered or threatened is appropriate
but for which substantial data on biological vulnerability and threat (s)
are not known or on file to support the immediate preparation of rules.
Taxa that were once considered for listing as endangered or threatened,
but are currently not receiving such consideration. These taxa are
included in one of the following three subcategories.
Subcategory 3A: Taxa presumed to be extinct.
Subcategory 3B: Taxa whose names do not meet the Endangered
Species Act's legal definition of species.
Subcategory 3C: Taxa now considered to be more widespread that
originally thought.
Note: The taxa in Categories 1 and 2 are candidates for possible addition to the list of
endangered and threatened species. The USFWS encourages their consideration in
environmental planning.
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State of California (1990)
Endangered: Taxa which are in serious danger of becoming extinct throughout all, or
a significant portion, of their range due to one or more causes including
loss of habitat, change in habitat, over exploitation, predation,
competition, or disease (Section 2062 of the Fish and Game Code).
Threatened: Taxa which, although not presently threatened with extinction, are likely
to become endangered species in the foreseeable future (Section 2067 of
the Fish and Game Code).
Rare: Taxa which, although not presently threatened with extinction, are
present in such small numbers throughout their range that they may
become endangered if the present environment worsens (Section 1901 of
the Fish and Game Code).
Candidate: Taxa which the Fish and Game Commission has formally noticed as being
under review by the Department in addition to the list of threatened and
endangered species.
California Native Plant Society (1995)
Lists
1A: Presumed Extinct in California
IB: Rare or Endangered in California and Elsewhere
2: Rare or Endangered in California, More Common Elsewhere
3: Need More Information
4: Plants of Limited Distribution
Note: Plants on CNPS list IB meet California Department of Fish and Game Criteria for
Rare or Endangered listing.
mmimm
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R-E-D code
R (Rarity)
1- Rare, but found in sufficient numbers and distributed widely enough that the
potential for extinction or extirpation is low at this time.
2- Occurrence confined to several populations or to one extended population.
3- Occurrence limited to one or a few highly restricted populations, or present in such
small numbers that it is seldom reported.
E (Endangerment)
1- Not endangered
2- Endangered in a portion of its range
3- Endangered throughout its range
D (Distribution)
1- More or less widespread outside of California
2- Rare outside California
3- Endemic to California
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Orange
County
Mexico
1"-8 Miles Tijuana
Thompson Property • Biological Resources Letter Report & Impact Analysis
Regional Map
BASE MAP SOURCE: USGS 7.5 Minute Series, Encinitas Quadrangle 1--2000'
Thompson Property • Biological Resources Letter Report & Impact Analysis
Vicinity Map