Appendix 4B Preliminary Jurisdictional Waters/Wetlands Delineation Report

Appendix 4b Preliminary Jurisdictional Waters/Wetlands Delineation Report

Preliminary Jurisdictional Waters/Wetlands Delineation Report

Del Sur Solar Project Lancaster, California

Prepared For: City of Lancaster Planning Department

Prepared By: Aspen Environmental Group

May 2015

Del Sur Solar Project Preliminary Jurisdictional Waters/Wetlands Delineation Report Contents Section Title 1. Introduction and Location ...... 4b-1 2. Existing Conditions ...... 4b-1 3. Regulatory Background ...... 4b-6 4. Waters/Wetlands Delineation ...... 4b-7 5. Summary and Conclusions ...... 4b-8 6. References ...... 4b-8

Tables Table 1. Summary of Vegetation and Cover Types in the Study Area, Solar Generating Facility, and the Gen-tie line Options ...... 4b-2 Table 2. Soil Units Occurring in the Study Area ...... 4b-5 Attachments Attachment A: Project Figures Attachment B: Representative Site Photos Attachment C: Mapped Drainage Information Attachment D: Soil Survey Excerpts Attachment E: Regulatory Background Information Attachment F: Wetland Indicator Status of Plant Species Observed in the Study Area Attachment G: Federal Non-Wetland/Wetland Waters Indicator Information

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Del Sur Solar Project PRELIMINARY JURISDICTIONAL WATERS/WETLANDS DELINEATION REPORT

1. Introduction and Location This report presents the findings of an investigation of jurisdictional features conducted by Aspen Environmental Group (Aspen) for the Del Sur Solar Project (project). The project includes both a solar generating facility (SGF) and multiple proposed generation-tie and communication line routes; the project area is located primarily within the City of Lancaster in Los Angeles County, California (Figure 1, Attachment A). The areas surveyed as part of this report included the SGF site and all proposed gen-tie routes (Study Area); the Study Area includes a 500-ft buffer (1,000-ft for one of the gen tie alternatives) around all project components. The Study Area is bordered to the north, east, and west by open space, agriculture, and rural residential areas. Land uses to the south include rural residences and existing solar facilities. The assessment of jurisdictional wetlands, other “waters of the U.S.,” waters of the State, and riparian habitat was conducted by Aspen Senior Biologist/Ecologist, Jared Varonin and Associate Biologist, Justin Wood, from 26 – 27 February 2015. This assessment was conducted to determine the extent of resources under the jurisdiction of the U.S. Army Corps of Engineers (Corps), the Lahontan Regional Water Quality Control Board (LRWQCB), and the California Department of Fish and Wildlife (CDFW; formerly California Department of Fish and Game) that occur within the Study Area. 1.1 Project Description The proposed project is a 100-megawatt (MW) utility-scale Solar Generating Facility (SGF) proposed on 725 acres in the City of Lancaster. Solar electricity generated by the proposed project would be delivered by an approximately 2- to 4-mile generation tie-line (gen-tie) that would extend to two previously approved substations near the existing Southern California Edison (SCE) Antelope Substation south of the proposed SGF. 1.2 Lead Agency Name and Address City of Lancaster Development Services Department 44933 North Fern Avenue Lancaster, CA 93534 1.3 Contact Person and Phone Number Ms. Jocelyn Swain Associate Planner - Environmental (661) 723-6249 [email protected] 2. Existing Conditions 2.1 Topography and Surrounding Land Uses The majority of the Study Area is located within the city limits of Lancaster; the Study Area occurs along the western edge of the city limits, approximately 7 miles west of CA-14, and 3 miles south of SR-138 (Figure 1, Attachment A). Portions of the proposed generation tie-line options, immediately north of

May 2015 4b-1 Appendix 4b DEL SUR SOLAR PROJECT PRELIMINARY JURISDICTIONAL WATERS/WETLANDS DELINEATION REPORT

West Avenue J, occur outside the city limits in areas of unincorporated Los Angeles County. The Study Area is generally bounded to the north by West Avenue G, to the south by West Avenue H, to the east by 93rd Street West, and to the west by 107th Street West. A large part of the Study Area is characterized by fallow agricultural fields that have been subject to past grazing activities; various transmission lines and their associated dirt roads cross portions of the Study Area. The Study Area is surrounded by fallow fields, agriculture, existing solar projects, and residential homes, and is approximately 4 miles east of the Antelope Valley Poppy Preserve. The Study Area is relatively flat with elevations ranging from 2,400 – 2,500 feet above mean sea level. 2.2 Vegetation Biological resources in the Study Area consist of primarily common plant species and vegetation communities characteristic of the western Mojave Desert and valley floors. Depending on the location, habitat conditions in the Study Area can be considered excellent to fair, with well-established monocultures of rubber rabbitbrush (Ericameria nauseosa) and fourwing saltbush (Atriplex canescens) scrub in several locations. The dominant non-native/invasive species observed in the Study Area included species such as London rocket (Sisymbrium irio), Russian thistle (Salsola tragus), and hare barley (Hordeum murinum). Six distinct vegetation communities were mapped within the Study Area. These communities were classified using names and descriptions in Sawyer et al. (2009) and are described further below. Many of these communities occur in a matrix of natural plant communities while others are sub-components of disturbed or developed areas. Some unvegetated areas with existing development or ruderal species are mapped as developed and do not match vegetation described in Sawyer et al. (2009). Table 1 lists the vegetation and cover types identified within the Study Area. Figures 2a and 2b (Attachment A) illustrate the vegetation and cover types that occur in the Study Area; vegetation and cover types are described further below. Attachment B contains representative photographs of the Study Area.

Table 1. Summary of Vegetation and Cover Types in the Study Area, Solar Generating Facility, and the Gen-tie line Options Vegetation Community Total Acres Sawyer, Keeler- Wolf, and Evens Holland (1986) Gen-Tie Gen-Tie Gen-Tie Gen-Tie (2009) Vegetation Vegetation Study Gen-Tie Center Western Eastern Line Classification Classification Area SGF City Route Route Route Route Extension California poppy fields Wildflower field 643.88 61.94 8.59 6.16 11.67 1.36 1.20 Stabilized Cooper’s boxthorn desert sand 9.09 9.09 ------scrub field Non-native Fiddleneck fields 1070.08 560.71 2.14 1.91 4.66 13.78 4.90 grassland Fourwing saltbush Desert saltbush 90.51 43.11 0.89 0.90 ------scrub scrub Rubber Rubber rabbitbrush rabbitbrush 86.18 45.79 -- 0.02 1.19 0.81 -- scrub scrub Tamarisk thickets Tamarisk scrub 13.45 0.88 6.52 6.51 -- 4.60 -- Developed* 432.32 4.88 9.56 9.09 31.41 27.98 -- Total 2,346 726 27.71 24.58 48.93 48.53 6.10 * This land cover is not defined in Sawyer et al. (2009) and Holland (1986) but is included in this table for acreage calculation purposes. Communities in bold type are considered sensitive by the CDFW.

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Vegetation Types California poppy fields [Eschscholzia (californica) Herbaceous Alliance]. California poppy fields, the second most dominant community in the Study Area, were abundant in the northwest, west, and southwestern portions of the Study Area on lands with no signs of past cultivation; this community type included a diverse assemblage of annual and perennial species. Within the Study Area this community was dominated by the presence of species such as California poppy (Eschscholzia californica), gilia (Gilia sp.), fiddlenecks (Amsinckia sp.), owl’s clover (Castilleja exserta), goldfields (Lasthenia sps.), and wild hyacinth (Dichelostemma capitatum). California poppy fields match the description of wildflower field in Holland (1986); wildflower fields are recognized as sensitive by the CDFW (2010b). Cooper's boxthorn scrub (Lycium cooperi Shrubland Alliance). Cooper’s boxthorn scrub occurs in only one discrete location in northwest portion of the Study Area growing in a distinct band from the southwest to the northeast. This community is not described in Sawyer et al. (2009); however, the naming of this community is based on Sawyer et al. (2009) nomenclature. In the Study Area this community is dominated solely by Cooper’s boxthorn (Lycium cooperi). Where this community occurs in the Study Area wind-blown sand accumulation was observed at the bases of shrubs that has resulted in the formation hummocks up to approximately 10 feet tall. Cooper’s boxthorn scrub resembles the description of stabilized desert sand field in Holland (1986); however, the dominant species reported in stabilized desert sand fields differ from that described in Cooper’s boxthorn scrub. Although Cooper’s boxthorn scrub is not a community name recognized by CDFW, it is likely to be considered sensitive; all other types of boxthorn scrub are recognized as sensitive by the CDFW (2010b). Fiddleneck fields (Amsinckia tessellata Herbaceous Alliance). Fiddleneck fields are similar in composition to the California poppy fields described above but have a much higher percent coverage of fiddleneck species; this community is by far the most dominant vegetative community and occurs throughout the Study Area. Dominant species, other than fiddlenecks, present within this community include non-natives such as red stemmed filaree (Erodium cicutarium), foxtail barley (Hordeum murinum) and natives such as popcorn flowers (Plagiobothrys sp.), goldfields (Lasthenia californica), and lupine (Lupinus sps.). In the Study Area this community is generally found on lands that show signs of previous agricultural activities. Due to the presence of non-native grasses within the fiddleneck fields this vegetation community most closely matches the descriptions of non-native grassland in Holland (1986); non-native grasslands are not recognized by CDFW as sensitive (2010b). Fourwing saltbush scrub (Atriplex canescens Shrubland Alliance). This vegetation community is dominated by fourwing saltbush (Atriplex canescens) and is typically found on alkaline soils. Fourwing saltbush scrub occurs primarily in the northwest corner of the Study Area; one small patch was observed between panel arrays at an existing solar facility in the southern portion of the Study Area. In addition to fourwing saltbush species such as rubber rabbitbrush (Ericameria nauseosa) and Cooper’s boxthorn were observed; these species however were found in much lower numbers than the fourwing saltbush. The canopy cover within this community was observed to be fairly dense with a diverse assemblage of herbaceous species growing in the fine sandy soils between shrubs. Herbaceous species observed include Peirson's lessingia (Lessingia glandulifera var. peirsonii), field evening primrose (Camissonia campestris), and California evening primrose (Oenothera californica). Fourwing saltbush scrub matches the description of desert saltbush scrub in Holland (1986); this community is not recognized by CDFW as sensitive (2010b). Rubber rabbitbrush scrub (Ericameria nauseosa Shrubland Alliance). Rubber rabbitbrush scrub is characterized by the dominance of rubber rabbitbrush (Ericameria nauseosa). This community was most often observed in abandoned agricultural fields where it has reestablished with the cessation of regular

May 2015 4b-3 Appendix 4b DEL SUR SOLAR PROJECT PRELIMINARY JURISDICTIONAL WATERS/WETLANDS DELINEATION REPORT and frequent disturbance. This community is similar in composition and structure to fourwing saltbush (above) but is dominated by rubber rabbitbrush. Rubber rabbitbrush scrub matches descriptions of rabbitbrush scrub in Holland (1986); this community is not recognized by CDFW as sensitive (2010b). Tamarisk thickets (Tamarix aphylla Semi-natural Shrubland Stands). This community, observed in only a few discrete locations (primarily adjacent to fallow agricultural fields) in the Study Area, is dominated by athel tamarisk (Tamarix aphylla); this species is generally observed as a woody shrub or small tree that has historically been planted in windrows for the purpose of reducing wind erosion on agricultural fields. Tamarisk species in general have the ability to invade adjacent natural habitats; this species of tamarisk however is generally found to have less of an affinity for invasion than other tamarisk species. Tamarisk are deep-rooted trees which allow them to persist with little to no irrigation. At one location in the Study Area, mapped as tamarisk thickets, there was one stand each of non-native English elm (Ulmus minor) and locust (Robinia sp.) within the windrows of tamarisk; these stands were smaller than the minimum mapping unit for the surveys and were therefore not mapped as separate communities. Both the English elm and locust function similar to tamarisk in regards to wildlife habitat and therefore have a similar habitat value. Tamarisk thickets match the description of tamarisk scrub in Holland (1986); this community is not recognized by CDFW as sensitive (2010b).

Other Cover Types Developed. This cover type is used to describe areas occupied by existing structures or infrastructure (i.e. houses, existing solar facilities, and roads), or areas that are primarily devoid of vegetation due to continual disturbance by vehicles, refuse dumping, or other anthropogenic means. While these areas typically lack vegetation they may support weedy annuals or ornamental species that may or may not have been intentionally planted. Developed lands occur throughout the Study Area. This cover type is not recognized by CDFW as sensitive (2010b). 2.3 Climate Weather within the Antelope Valley is characterized as a desert climate that experiences extreme fluctuations of daily temperatures, strong seasonal winds, and generally clear skies (Impact Sciences, 2007). Temperatures can get as low as 8oF in January and as high as 119oF in august; daytime high temperatures are generally observed to exceed 100oF, on a consistent basis, beginning each year in May (Impact Sciences, 2007). Dry winds are a prominent feature in the late winter through early spring with dry winds occurring in the afternoon and evenings; winds in excess of 25 miles per hour (mph) and gusts in excess of 75 mph are not uncommon (Impact Sciences, 2007). 2.4 Hydrology and Geomorphology The City of Lancaster lies within the Antelope Valley Drainage Basin. The basin floor is an alluvial plain formed by runoff from the mountains to the south. With an average annual rainfall of approximately 5 inches, the natural and manmade drainage channels in the basin are dry most of the time. The Antelope Valley represents a large topographic and groundwater basin in the western part of the Mojave Desert. The Antelope Valley Groundwater Basin is divided into twelve subunits based upon differential ground flow patterns, recharge characteristics, geographic location, as well as controlling geologic structures. [Impact Sciences, 2007]

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The Antelope Valley region is a closed topographic basin with no outlet to the ocean. All water that enters the region either infiltrates into the groundwater basin, evaporates, or flows toward the three dry lakes located on Edwards Air Force Base (EAFB); Rosamond Lake, Buckhorn Lake, and Rogers Lake. In general, groundwater flows northeasterly from the mountain ranges to the dry lakes. Due to the relatively impervious nature of the dry lake soil and high evaporation rates, water that collects on the dry lakes eventually evaporates rather than infiltrating into the groundwater. [LACWD, 2008] 2.5 Geology Geologically, the Antelope Valley is part of the Mojave structural block, which is an elevated desert lying between 2,300 and 3,500 feet above mean sea level. The topography of the area ranges from gentle to moderate slopes. The Antelope Valley is surrounded by the Tehachapi Mountain range to the north and northeast, and the San Gabriel, Sierra Pelona, and Liebre Mountains to the south and southwest. The overall topography of the City is somewhat flat. Major topographic features include Quartz Hill locates in the southern portion of the Lancaster Area, and the Fairmont and Antelope Buttes located west of 110th Street West. [Impact Sciences, 2007] 2.6 Soils Soils in the Study Area were dominated by well-drained sandy substrates. Historic soil data from the National Resource Conservation Society (NRCS) was used to determine potential soil types, including where hydric soils have historically occurred, in the project area (2015a and 2015b). Figure 3 (Attachment A) illustrates the locations of these soil types within the Study Area; however, it is important to note historic soil maps are broad in scale and are not used for site specific analysis.

Table 2. Soil Units Occurring in the Study Area Acres Within % Total Map Unit Map Unit Name Description Study Within Symbol Area Study Area A well-drained soil that occurs in alluvial fans and terraces; generally occurs from 2,000-3,000 feet in elevation; parent Adelanto coarse material consists of alluvium derived from granite; not prone to AcA sandy loam, 2 to 21 flooding; coarse sandy loam (0-16”), sandy loam/coarse sandy 0.88% 5 percent slopes loam (16-41”), stratified loamy sand to coarse sandy loam (41- 80”) An excessively drained soil that occurs in alluvial fans, generally Cajon loamy occurs from 400-4,000 feet in elevation; parent material CaA sand, 0 to 2 496 consists of alluvium derived from granite; not prone to flooding; 21.13% percent slopes loamy sand (0-9”), sand, fine sand (9-60”) Cajon loamy An excessively drained soil; generally occurs from 1,800 – sand, loamy 2,800 feet in elevation; parent material is alluvium derived from CbA 9 substratum, 0 to 2 granite; not prone to flooding; loamy sand (0 – 9 “), sand, fine 0.40% percent slopes sand, and stratified sand to clay loam (9 – 30”) Found on hills; parent material is aeolian sands; fine sand (0- DuD Dune land 30 6”), sand/fine sand (6-60”) 1.27% A well-drained soil found in terraces and alluvial fans; generally Greenfield sandy occurs from 2,600-4,200 feet in elevation; parent material is GsA loam, 0 to 2 alluvium derived from granite; not prone to flooding; sandy loam 783 33.39% percent slopes (0-20”), sandy loam (20-60”), stratified loamy sand to coarse sandy loam (60-80”)

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Table 2. Soil Units Occurring in the Study Area Acres Within % Total Map Unit Map Unit Name Description Study Within Symbol Area Study Area A well-drained soil; generally occurs from 2,600 to 4,200 feet in Greenfield sandy elevation; parent material is alluvium derived from granite; not GsC loam, 2 to 9 465 prone to flooding; sandy loam (0 60”), stratified loamy sand to 19.81% percent slopes coarse sandy loam (60 – 80”) Greenfield sandy A well-drained soil; generally found from 2,600 to 4.200 feet in loam, 2 to 9 elevation; parent material is alluvium derived from granite; not GsC2 6 percent slopes, prone to flooding; sandy loam (0 – 60”), stratified loamy sand to 0.26% eroded coarse sandy loam (60 – 80”) A well-drained soil found in alluvial fans; generally occurs from Hanford coarse 2,600-4,200 feet; parent material consists of alluvium derived HbA sandy loam, 0 to from granite; coarse sandy loam (0-8”), sandy loam/coarse 31 1.33% 2 percent slopes sandy loam/gravelly loamy coarse sand/gravelly coarse sandy loam (8-39”) A well-drained soil; generally found rom 2,600 – 4,200 feet in Hanford sandy elevation; parent material is alluvium derived from granite; not HcA loam, 0 to 2 78 prone to flooding; sandy loam (0 – 8”), fine sandy loam and 3.30% percent slopes sandy loam (8 – 70”). A well-drained soil found in alluvial fans; generally occurs from Hesperia fine 200-4,000 feet in elevation; parent material alluvium derived HkA sandy loam, 0 to 117 from granite; not prone to flooding; fine sandy loam (0-4”), fine 4.97% 2 percent slopes sandy loam/sandy loam/coarse sandy loam (4-54”) A well-drained soil; generally found from 2,700 to 3,900 feet in Ramona coarse elevation; parent material is alluvium derived from granite; not RcA sandy loam, 0 to 143 prone to flooding; coarse sandy loam (0 – 20”), fine sandy loam 6.10% 2 percent slopes (20 – 31”). Sandy clay loam (31 – 90”) A well-drained soil found in terraces; generally occurs from Ramona coarse 2,700-3,900 feet in elevation; parent material consists of RcB sandy loam, 2 to alluvium derived from granite; not prone to flooding; coarse 57 2.42% 5 percent slopes sandy loam (0-20”), fine sandy loam (20-31”), sandy clay loam (31-90”) A well-drained soil found in terraces; generally occurs from Ramona loam, 2 2,700-3,900 feet, parent material consists of alluvium derived RfB to 5 percent 67 from granite; not prone to flooding; loam (0-12”), fine sandy 2.85% slopes loam (12-31”), sandy clay loam (31-90”) A moderately well drained soil; generally found from 1,500 to 3,500 feet in elevation; parent material is alluvium derived from Sunrise sandy Sv granite; not prone to flooding; sandy loam (0 – 19”), loam (19 – 44 loam 1.89% 31”), cemented (31 – 48”), stratified gravelly sandy loam to loam (48 – 65”) Total 2,347 Source: NRCS, 2015 3. Regulatory Background Jurisdictional waters, wetlands, and riparian habitat are regulated by the Corps, LRWQCB, and CDFW. The Corps Regulatory Program regulates activities pursuant to Section 404 of the federal Clean Water Act (CWA); the CDFW regulates activities under the Fish and Game Code Section 1600-1607; and the LARWQCB regulates activities under Section 401 of the CWA and the California Porter-Cologne Water Quality Control Act. Refer to Attachment E for additional details on regulatory authorities and background.

Appendix 4b 4b-6 May 2015 Del Sur Solar Project PRELIMINARY JURISDICTIONAL WATERS/WETLANDS DELINEATION REPORT

4. Waters/Wetlands Delineation 4.1 Delineation Methodology This section describes the methods employed by Aspen during surveys conducted in February 2015 to determine the extent of potentially jurisdictional wetlands and/or waters that occur in the Study Area. Prior to conducting the field assessment Aspen reviewed current and historic aerial photographs; detailed topographic maps (1-foot intervals); the Antelope Valley Area Soil Survey (Natural Resource Conservation Service [NRCS]); and the local and state hydric soil list to evaluate the potential active channels and wetland features that occur in the Study Area (NRCS 2015a, 2015b). During the field assessment, vegetation, hydrology, and locations of soil pits (if required) were mapped using a Trimble Juno 3B GPS unit or mapped digitally with a GPS enabled tablet using the ArcGIS Collector Application. The data was then processed and a total area for each jurisdiction was calculated.

Federal Wetlands/Waters Jurisdictional non-wetland “waters of the U.S.” were delineated based on the limits of the ordinary high water mark (OHWM) as determined by changes in physical and biological features, such as bank erosion, deposited vegetation or debris, and vegetative characteristics outlined in the Corps Field Guide to the Identification of the Ordinary High Water Mark in the Arid West Region (2008b). Jurisdictional wetlands, if present, were delineated using a routine determination according to the methods outlined in the Corps Wetland Delineation Manual (1987), and the Arid West Supplement (2008a) based on three wetland parameters: dominant hydrophytic vegetation, wetland hydrology, and hydric soils. See Tables 4 – 7 in Attachment F for a list of key features for determining the presence of wetlands as identified by the arid west manual.

CDFW Jurisdictional Waters CDFW jurisdiction was delineated to the top of the banks of the channel and/or to the edge of the vegetation boundary. For portions of the project area, the CDFW jurisdictional boundary mirrors the OHWM. In some areas, the vegetative indictors of hydrology may extend beyond the OHWM. Therefore, the total acreage of CDFW jurisdictional waters may greater than the combined acreage of federal jurisdictional waters and/or wetlands. 4.2 Results One type of jurisdictional feature was documented within the Study area: CDFW State Waters (refer to Figure 4, Attachment A). According to the NRCS Hydric Soils List (NRCS 2015a and 2015b), there are no mapped hydric soils in the project area.

Federal Wetlands Based on Aspen’s professional opinion of an assessment of hydrology, vegetation and soils no portion of the Study Area satisfies the criteria to be considered wetlands (USACE 1897 and USACE 2008).

Federal Non-Wetland Waters Based on Aspen’s professional opinion of an assessment of hydrology and the limits of the OHWM, as determined by changes in physical and biological features, and an assessment of connectivity to known “waters of the United States” no portion of the Study Area meets the definition of “waters of the United

May 2015 4b-7 Appendix 4b DEL SUR SOLAR PROJECT PRELIMINARY JURISDICTIONAL WATERS/WETLANDS DELINEATION REPORT

States” as outlined in 33 CFR Part 328. While most of the drainages documented in the Study Area exhibit hydrologic features, the Study Area was found to drain to the east and northeast into Rosamond Dry Lake and Roger’s Dry Lake. Because the Study Area drains to closed or internally drained basins the onsite drainages do not fall under federal jurisdiction. Although the on-site drainage features do not fall under the regulatory requirements of the CWA, the RWQCB may elect to take jurisdiction over state waters through the Porter Cologne Act.

CDFW Waters Using a combination of vegetation mapping, bed/bank delineation, and field observations, 15.64 acres of CDFW jurisdictional waters were identified within the Study Area (9.90 acres within the potential project impact areas). Refer to Attachment C for detailed results of the delineation. 5. Summary and Conclusions All of the potentially jurisdictional features mapped within the Study Area are characterized as ephemeral desert dry washes. These washes exhibited field indicators of active flow including water marks, linear deposits of sediment and/or plant debris, bank scour, and erosion. It was determined that the project area supports one type of jurisdictional feature: CDFW jurisdictional waters. Using a combination of vegetation mapping, bed/bank delineation, and field observations, approximately 15.64 acres of CDFW potentially jurisdictional waters were identified within the Study Area. The conclusions presented above represent Aspen’s professional opinion based on knowledge and experience with the Corps, the WQCB, and the CDFW, including regulatory guidance documents and manuals. The Corps, WQCB, and CDFW have final authority in determining the status and presence and extent of jurisdictional wetlands/waters. 6. References Beauchamp, R. Mitchel. 1986. A Flora of San Diego County, California. Sweetwater River Press, National City, California. Baldwin, B.G., D. Goldman, D. J. Keil, R.Patterson, and T.J. Rosatti. 2012. The Jepson Manual: Higher Plants of California: 2nd Edition. University of California Press, Berkeley, California. Belzer, Thomas J. 1991. Roadside Plants of Southern California. 4th ed. Mountain Press Publishing Company, Missoula, Montana. Bossard, Carla C., J.M. Randall and M.C. Hoshovsky. 2000. Invasive Plants of California’s Wildlands. University of California Press, Los Angeles, California. Brenzel, K.N. (editor), 2001. Sunset Western Garden Book. Sunset Publishing Company, Menlo Park, California. Bureau of Land Management (BLM) and U.S. Forest Service (USFS). Public Land Survey Systems (PLSS). www.geocommunicator.gov. Website accessed February 2015. CNPS (California Native Plant Society). 2010. Electronic inventory of rare and endangered vascular plants of California). CNPS, Sacramento, California. http://www.rareplants.cnps.org/ Hickman, James C. 1996. The Jepson Manual: Higher Plants of California. 3rd ed. University of California Press, Berkeley and Los Angeles, California. Holland, R. F. 1986. Preliminary Descriptions of the Terrestrial Natural Communities of California. Non- game Heritage Program, State of California Department of Fish and Game, Sacramento.

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Impact Sciences. 2007. Amargosa Creek Specific Plan: Final Program Environmental Impact Report Volume I. LACWD (Los Angeles County Waterworks District). 2008. North Los Angeles/Kern County Regional Recycled Water Project: Final Program Environmental Impact Report. Munsell Color. 2000 Revised Edition. Soil Color Charts. GretagMacbeth. New York. Natural Resource Conservation Service (NRCS). 2015a. Web Soil Survey 2.0. http://websoilsurvey.nrcs.usda.gov/. Website accessed Feburary 2015. ______. 2015b. National Hydric Soil List by State. http://soils.usda.gov/use/hydric/. Website accessed February 2015. ______. 2015c. Official Soil Series Descriptions. http://soils.usda.gov/technical/classification/osd ______. 1996. A Vegetative Guide to Selected Native Grasses of California. United States Department of Agriculture. NRCS, West Region. 1988. Western Wetland Flora Field Office Guide to Plant Species. United States Department of Agriculture. Ornduff, Robert, P.M. Faber and T. Keeler-Wolf. 2003. Introduction to California Plant Life. 2nd ed. University of California Press, Los Angeles, California. Petrides, George A. 1998. A Field Guide to Western Trees: Western United States and Canada. Houghton Mifflin Company, New York, New York. Raven, Peter H. 1966. Native Shrubs of Southern California. University of California Press, Los Angeles, California. Reed, Porter B. Jr. 1988. National List of Plant Species That Occur in Wetlands: California (Region 0). U.S. Fish and Wildlife Service, National Ecology Research Center, St. Petersburg, FL. Sawyer, John O., T. Keeler-Wolf, and J.M. Evens. 2009. A Manual of California Vegetation; 2nd Edition. California Native Plant Society, Sacramento, California. Stuart, John D. and J.O. Sawyer. 2001. Trees and Shrubs of California. University of California Press, Los Angeles, California. United States Geological Survey (USGS). Del Sur, California 7.5-minute Topographic Quadrangle. U.S. Army Corps of Engineers (Corps). 2008a. Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Arid West Region (Version 2.0), ed. J. S. Wakeley, R. W. Lichvar, and C. V. Noble. ERDC/EL TR-08-28. Vicksburg, MS: U.S. Army Engineer Research and Development Center. ______. 2008b. A Field Guide to the Identification of the Ordinary High Water Mark (OHWM) in the Arid West Region of the Western United States. ed. R. W. Lichvar and S. M. McColley. ERDC/CRREL TR-08-12. Hanover, NH: Cold Regions Research and Engineering Laboratory. ______. 2012. The National Wetland Plant Listed. R. W. Lichvar. ERDC/CRREL TR-12-11. Hanover, NH: Cold Regions Research and Engineering Laboratory. ______. 1987. United States Army Corps of Engineers Wetland Delineation Manual. Technical Report Y- 87-1. U.S. Army Engineer Waterways Experiment Station. Vicksburg, MS. United States Fish and Wildlife Service. 1997. The National List of Vascular Plant Species that Occur in Wetlands: 1996 National Summary. Ecology Section – National Wetlands Inventory.

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Attachment A: Project Figures

Del Sur Solar Project Preliminary Jurisdictional Waters/Wetlands Delineation Report

C12 82Nd

115Th C14

87Th 105Th

D 138 D 138 75Th D2 67Th

D4 D4 D6 66Th

Project90Th LocationD6

D8 D8 95Th D10 D10 D12 ^ D12 D14

E 77Th

105Th E4

85Th E10 82Nd E10 E12 E12

91St 93Rd E13 Wood E14 F

95Th 100Th

F8 130Th

G G

75Th

105Th 85Th Del Sur H H Elementary Lancaster 100Th School

H8 75Th

Munz Ranch 95Th

Lancaster

110Th

105Th 80Th

130Th

^_ J

135Th ^_

95Th

100Th J8 120Th K

K 105Th

Antelope 70Th

Substation 85Th

100Th L

Solar Generating Facility Existing/Approved Collector Figure 1 Substations County Jurisdiction ^_ Potential Underground Gen-tie and 1:60,000 City of Lancaster Communication Line Routes 0 1,250 2,500 5,000 Project Location ¯ Feet May 2015 Del Sur Solar Project Preliminary Jurisdictional Waters/Wetlands Delineation Report

Vegetation California poppy fields Fourwing saltbrush scrub Cooper's boxthorn scrub Rubber rabbitbrush scrub Developed Tamarisk thickets Fiddleneck fields

Underground Gen-Tie Lines Figure 2A Solar Generating Facility 1:15,000 Study Area Vegetation Communities 0 375 750 1,500 and Land Covers ¯ Feet Souce: TerraServer Imagery, Feb. 2015 May 2015 Del Sur Solar Project Preliminary Jurisdictional Waters/Wetlands Delineation Report

Vegetation California poppy fields Fourwing saltbrush scrub Cooper's boxthorn scrub Rubber rabbitbrush scrub Developed Tamarisk thickets Fiddleneck fields

Underground Gen-Tie Lines Figure 2B Solar Generating Facility 1:20,000 Study Area Vegetation Communities 0 500 1,000 2,000 and Land Covers ¯ Feet Souce: TerraServer Imagery, Feb. 2015 May 2015 Del Sur Solar Project Preliminary Jurisdictional Waters/Wetlands Delineation Report

Underground Gen-Tie Lines Soil Type (Map Unit Symbol) Figure 3 Project Boundary AcA GsA HcA RfB 1:25,000 CaA GsC HkA Sv Study Area CbA GsC2 RcA 0 750 1,500 3,000 Soils ¯ Feet Source: Bing, 2014;TerraServer Imagery, Feb. 2015 DuD HbA RcB May 2015 Del Sur Solar Project Preliminary Jurisdictional Waters/Wetlands Delineation Report

1 3 6 5

7 8

21 22 19 10 11 18 33 4

20 14 13

32 16 15 24 17 26 28 31 25 29 27 30 23

Underground Gen-Tie Line Potentially Jurisdictional Drainages Figure 4 Solar Generating Facility CDFW 1:25,000 Study Area Potentially Jurisdictional

0 700 1,400 2,800 Drainages ¯ Feet Source: Bing, 2014;TerraServer Imagery, Feb. 2015 May 2015

Attachment B: Representative Site Photos

Photo 1 - View looking west at Drainage No. 10. Photo 2 – View looking south at Drainage No. 13

Photo 3 – View looking east at Drainage No. 11.

Photo 4 – View looking northeast at Drainage No. 16.

Photo 5 –View looking west at Drainage No. 21.

Photo 6- View of the western terminus of Drainage No. 23.

Attachment C: Mapped Drainage Information

Mapped Drainages in the Study Area Acreage of Drainage Drainage No. Width* within Study Area Drainage Type 1 20 0.06 Ephemeral Drainage 2 20 0.60 Ephemeral Drainage 3 60 1.19 Ephemeral Drainage 4 12 0.17 Ephemeral Drainage 5 40 2.39 Ephemeral Drainage 6 15 0.99 Ephemeral Drainage 7 35 0.56 Ephemeral Drainage 8 20 0.36 Ephemeral Drainage 9 12 0.17 Ephemeral Drainage 10 18 0.23 Ephemeral Drainage 11 30 0.41 Ephemeral Drainage 12 5 0.02 Ephemeral Drainage 13 5 0.18 Ephemeral Drainage 14 3 0.22 Ephemeral Drainage 15 3 0.06 Ephemeral Drainage 16 12 0.40 Ephemeral Drainage 17 14 0.21 Ephemeral Drainage 18 20 1.61 Ephemeral Drainage 19 50 2.39 Ephemeral Drainage 20 20 0.96 Ephemeral Drainage 21 20 0.50 Ephemeral Drainage 22 10 0.19 Ephemeral Drainage 23 3 0.49 Ephemeral Drainage 24 3 0.17 Ephemeral Drainage 25 3 0.03 Ephemeral Drainage 26 3 0.31 Ephemeral Drainage 27 4 0.21 Ephemeral Drainage 28 5 0.11 Ephemeral Drainage 29 6 0.16 Ephemeral Drainage 30 4 0.06 Ephemeral Drainage 31 4 0.04 Ephemeral Drainage 32 14 0.03 Ephemeral Drainage 33 12 0.17 Ephemeral Drainage * Average width of drainage occurring within the surveyed area.

Attachment D: Soil Survey Excerpts

Custom Soil Resource Report

Frequency of flooding: None Frequency of ponding: None Salinity, maximum in profile: Nonsaline (0.0 to 2.0 mmhos/cm) Available water storage in profile: High (about 9.5 inches) Interpretive groups Land capability classification (irrigated): 2e Land capability classification (nonirrigated): 7e Hydrologic Soil Group: A Ecological site: Sandy 4-9" (R030XG022CA)

Minor Components Cajon Percent of map unit: 10 percent Mojave Percent of map unit: 5 percent

AcA—Adelanto coarse sandy loam, 2 to 5 percent slopes

Map Unit Setting National map unit symbol: hccm Elevation: 2,000 to 3,000 feet Mean annual precipitation: 6 inches Mean annual air temperature: 63 degrees F Frost-free period: 250 to 260 days Farmland classification: Prime farmland if irrigated

Map Unit Composition Adelanto and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Adelanto Setting Landform: Alluvial fans, terraces Landform position (two-dimensional): Backslope Landform position (three-dimensional): Tread Down-slope shape: Linear Across-slope shape: Linear Parent material: Alluvium derived from granite Typical profile H1 - 0 to 16 inches: coarse sandy loam H2 - 16 to 41 inches: sandy loam, coarse sandy loam H2 - 16 to 41 inches: sandy loam H3 - 41 to 80 inches: stratified loamy sand to coarse sandy loam H4 - 80 to 86 inches:

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Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Salinity, maximum in profile: Nonsaline (0.0 to 2.0 mmhos/cm) Available water storage in profile: High (about 10.0 inches) Interpretive groups Land capability classification (irrigated): 2s Land capability classification (nonirrigated): 7e Hydrologic Soil Group: A Ecological site: Loamy 4-9" (R030XG021CA)

Minor Components Cajon Percent of map unit: 10 percent Mojave Percent of map unit: 5 percent

AdB—Adelanto gravelly sandy loam, 2 to 5 percent slopes

Map Unit Setting National map unit symbol: hccn Elevation: 2,000 to 3,000 feet Mean annual precipitation: 6 inches Mean annual air temperature: 63 degrees F Frost-free period: 250 to 260 days Farmland classification: Prime farmland if irrigated

Map Unit Composition Adelanto and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit.

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CaA—Cajon loamy sand, 0 to 2 percent slopes

Map Unit Setting National map unit symbol: hccx Elevation: 400 to 4,000 feet Mean annual precipitation: 3 to 9 inches Mean annual air temperature: 63 to 70 degrees F Frost-free period: 200 to 300 days Farmland classification: Prime farmland if irrigated

Map Unit Composition Cajon and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Cajon Setting Landform: Alluvial fans Landform position (two-dimensional): Backslope Landform position (three-dimensional): Tread Down-slope shape: Linear Across-slope shape: Linear Parent material: Alluvium derived from granite Typical profile H1 - 0 to 9 inches: loamy sand H2 - 9 to 60 inches: sand, fine sand H2 - 9 to 60 inches: Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Excessively drained Runoff class: Negligible Capacity of the most limiting layer to transmit water (Ksat): High to very high (5.95 to 19.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 5 percent Salinity, maximum in profile: Nonsaline (0.0 to 2.0 mmhos/cm) Available water storage in profile: Moderate (about 7.8 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (nonirrigated): 7e Hydrologic Soil Group: A Ecological site: Sandy 4-9" (R030XG022CA)

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H2 - 9 to 18 inches: very channery loam H3 - 18 to 59 inches: weathered bedrock Properties and qualities Slope: 30 to 50 percent Depth to restrictive feature: 8 to 20 inches to paralithic bedrock Natural drainage class: Well drained Runoff class: High Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 5 percent Salinity, maximum in profile: Nonsaline (0.0 to 2.0 mmhos/cm) Available water storage in profile: Very low (about 1.5 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 7e Hydrologic Soil Group: D

Minor Components Arnold Percent of map unit: 4 percent Gullied land Percent of map unit: 4 percent Linne Percent of map unit: 4 percent Sedimentary rock land Percent of map unit: 3 percent

CbA—Cajon loamy sand, loamy substratum, 0 to 2 percent slopes

Map Unit Setting National map unit symbol: hccz Elevation: 1,800 to 2,800 feet Mean annual precipitation: 4 to 9 inches Mean annual air temperature: 66 degrees F Frost-free period: 240 to 260 days Farmland classification: Prime farmland if irrigated

Map Unit Composition Cajon and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit.

42 Custom Soil Resource Report

Description of Cajon Setting Landform: Alluvial fans Landform position (two-dimensional): Backslope Landform position (three-dimensional): Tread Down-slope shape: Linear Across-slope shape: Linear Parent material: Alluvium derived from granite Typical profile H1 - 0 to 9 inches: loamy sand H2 - 9 to 30 inches: sand, fine sand H2 - 9 to 30 inches: stratified sand to clay loam H3 - 30 to 60 inches: Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Excessively drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 5 percent Salinity, maximum in profile: Nonsaline to slightly saline (2.0 to 8.0 mmhos/cm) Available water storage in profile: Moderate (about 6.8 inches) Interpretive groups Land capability classification (irrigated): 2e Land capability classification (nonirrigated): 7e Hydrologic Soil Group: B Ecological site: Sandy 4-9" (R030XG022CA)

Minor Components Unnamed Percent of map unit: 10 percent Cajon Percent of map unit: 4 percent Unnamed Percent of map unit: 1 percent Landform: Playas

43 Custom Soil Resource Report

Interpretive groups Land capability classification (irrigated): 4s Land capability classification (nonirrigated): 7s Hydrologic Soil Group: A Ecological site: Sandy 9-20" (R019XD065CA)

Minor Components Metz Percent of map unit: 10 percent Unnamed Percent of map unit: 4 percent Unnamed Percent of map unit: 1 percent Landform: Drainageways

DA—Dams

Map Unit Composition Dam: 100 percent Estimates are based on observations, descriptions, and transects of the mapunit.

DU—Dumps

Map Unit Composition Dumps: 100 percent Estimates are based on observations, descriptions, and transects of the mapunit.

DuD—Dune land

Map Unit Composition Dune land: 90 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Dune Land Setting Landform: Hills Landform position (two-dimensional): Backslope Landform position (three-dimensional): Side slope Down-slope shape: Linear Across-slope shape: Linear Parent material: Eolian sands

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Typical profile H1 - 0 to 6 inches: fine sand H2 - 6 to 60 inches: sand, fine sand H2 - 6 to 60 inches: Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 8 Hydrologic Soil Group: A

Minor Components Unnamed Percent of map unit: 10 percent

GaE2—Gaviota rocky sandy loam, 15 to 30 percent slopes, eroded

Map Unit Setting National map unit symbol: hcdk Elevation: 100 to 4,000 feet Mean annual precipitation: 8 to 20 inches Mean annual air temperature: 45 to 61 degrees F Frost-free period: 110 to 275 days Farmland classification: Not prime farmland

Map Unit Composition Gaviota and similar soils: 90 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Gaviota Setting Landform: Hills Landform position (two-dimensional): Backslope Landform position (three-dimensional): Side slope Down-slope shape: Concave Across-slope shape: Concave Parent material: Residuum weathered from sandstone Typical profile H1 - 0 to 14 inches: sandy loam H2 - 14 to 17 inches: unweathered bedrock Properties and qualities Slope: 15 to 30 percent Depth to restrictive feature: 10 to 20 inches to lithic bedrock Natural drainage class: Well drained Runoff class: Very high Capacity of the most limiting layer to transmit water (Ksat): Very low to high (0.00 to 5.95 in/hr) Depth to water table: More than 80 inches

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GsA—Greenfield sandy loam, 0 to 2 percent slopes

Map Unit Setting National map unit symbol: hcdv Elevation: 2,600 to 4,200 feet Mean annual precipitation: 9 to 12 inches Mean annual air temperature: 63 degrees F Frost-free period: 200 to 250 days Farmland classification: Prime farmland if irrigated

Map Unit Composition Greenfield and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Greenfield Setting Landform: Terraces, alluvial fans Landform position (two-dimensional): Backslope Landform position (three-dimensional): Tread Down-slope shape: Linear Across-slope shape: Linear Parent material: Alluvium derived from granite Typical profile H1 - 0 to 20 inches: sandy loam H2 - 20 to 60 inches: sandy loam H3 - 60 to 80 inches: stratified loamy sand to coarse sandy loam Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat): High (1.98 to 5.95 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Moderate (about 8.2 inches) Interpretive groups Land capability classification (irrigated): 1 Land capability classification (nonirrigated): 4c Hydrologic Soil Group: A Ecological site: Loamy 9-20" (R019XD064CA)

Minor Components Hanford Percent of map unit: 5 percent

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Riverwash Percent of map unit: 5 percent Landform: Drainageways Sandy alluvial land Percent of map unit: 4 percent Unnamed Percent of map unit: 1 percent Landform: Swales

GsC—Greenfield sandy loam, 2 to 9 percent slopes

Map Unit Setting National map unit symbol: hcdw Elevation: 2,600 to 4,200 feet Mean annual precipitation: 9 to 12 inches Mean annual air temperature: 63 degrees F Frost-free period: 200 to 250 days Farmland classification: Prime farmland if irrigated

Map Unit Composition Greenfield and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Greenfield Setting Landform: Terraces, alluvial fans Landform position (two-dimensional): Backslope Landform position (three-dimensional): Tread Down-slope shape: Linear Across-slope shape: Linear Parent material: Alluvium derived from granite Typical profile H1 - 0 to 20 inches: sandy loam H2 - 20 to 60 inches: sandy loam H3 - 60 to 80 inches: stratified loamy sand to coarse sandy loam Properties and qualities Slope: 2 to 9 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): High (1.98 to 5.95 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Moderate (about 8.2 inches)

81 Custom Soil Resource Report

Interpretive groups Land capability classification (irrigated): 2e Land capability classification (nonirrigated): 4e Hydrologic Soil Group: A Ecological site: Loamy 9-20" (R019XD064CA)

Minor Components Hanford Percent of map unit: 8 percent Ramona Percent of map unit: 5 percent Unnamed Percent of map unit: 1 percent Unnamed Percent of map unit: 1 percent

GsC2—Greenfield sandy loam, 2 to 9 percent slopes, eroded

Map Unit Setting National map unit symbol: hcdx Elevation: 2,600 to 4,200 feet Mean annual precipitation: 9 to 12 inches Mean annual air temperature: 63 degrees F Frost-free period: 200 to 250 days Farmland classification: Prime farmland if irrigated

Map Unit Composition Greenfield and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit.

82 Custom Soil Resource Report

Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): High (1.98 to 5.95 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Moderate (about 8.2 inches) Interpretive groups Land capability classification (irrigated): 2e Land capability classification (nonirrigated): 4e Hydrologic Soil Group: A Ecological site: Loamy 9-20" (R019XD064CA)

Minor Components Hanford Percent of map unit: 10 percent Unnamed Percent of map unit: 4 percent Unnamed Percent of map unit: 1 percent Landform: Drainageways

GsD2—Greenfield sandy loam, 9 to 15 percent slopes, eroded

Map Unit Setting National map unit symbol: hcdy Elevation: 2,600 to 4,200 feet Mean annual precipitation: 9 to 12 inches Mean annual air temperature: 63 degrees F Frost-free period: 200 to 250 days Farmland classification: Not prime farmland

Map Unit Composition Greenfield and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit.

83 Custom Soil Resource Report

Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat): High (1.98 to 5.95 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Salinity, maximum in profile: Nonsaline (0.0 to 2.0 mmhos/cm) Available water storage in profile: Very high (about 12.8 inches) Interpretive groups Land capability classification (irrigated): 2e Land capability classification (nonirrigated): 4e Hydrologic Soil Group: A Ecological site: Sandy 9-20" (R019XD065CA)

Minor Components Dune land Percent of map unit: 10 percent Unnamed Percent of map unit: 4 percent Unnamed Percent of map unit: 1 percent Landform: Drainageways

HbA—Hanford coarse sandy loam, 0 to 2 percent slopes

Map Unit Setting National map unit symbol: hcf1 Elevation: 2,600 to 4,200 feet Mean annual precipitation: 9 to 12 inches Mean annual air temperature: 63 degrees F Frost-free period: 200 to 250 days Farmland classification: Prime farmland if irrigated

Map Unit Composition Hanford and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Hanford Setting Landform: Alluvial fans Landform position (two-dimensional): Backslope Landform position (three-dimensional): Tread Down-slope shape: Linear Across-slope shape: Linear

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Parent material: Alluvium derived from granite Typical profile H1 - 0 to 8 inches: coarse sandy loam H2 - 8 to 39 inches: sandy loam, coarse sandy loam H2 - 8 to 39 inches: gravelly loamy coarse sand, gravelly coarse sandy loam H3 - 39 to 70 inches: H3 - 39 to 70 inches: Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat): High (1.98 to 5.95 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Salinity, maximum in profile: Nonsaline (0.0 to 2.0 mmhos/cm) Available water storage in profile: Very high (about 13.3 inches) Interpretive groups Land capability classification (irrigated): 2s Land capability classification (nonirrigated): 4e Hydrologic Soil Group: A Ecological site: Loamy 9-20" (R019XD064CA)

Minor Components Greenfield Percent of map unit: 5 percent Riverwash Percent of map unit: 5 percent Landform: Drainageways Sandy alluvial land Percent of map unit: 4 percent Unnamed Percent of map unit: 1 percent Landform: Drainageways

HbC—Hanford coarse sandy loam, 2 to 9 percent slopes

Map Unit Setting National map unit symbol: hcf2 Elevation: 2,600 to 4,200 feet Mean annual precipitation: 9 to 12 inches Mean annual air temperature: 63 degrees F Frost-free period: 200 to 250 days Farmland classification: Prime farmland if irrigated

87 Custom Soil Resource Report

Minor Components Ramona Percent of map unit: 5 percent Greenfield Percent of map unit: 5 percent Unnamed Percent of map unit: 5 percent

HcA—Hanford sandy loam, 0 to 2 percent slopes

Map Unit Setting National map unit symbol: hcf4 Elevation: 2,600 to 4,200 feet Mean annual precipitation: 9 to 12 inches Mean annual air temperature: 63 degrees F Frost-free period: 200 to 250 days Farmland classification: Prime farmland if irrigated

Map Unit Composition Hanford and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Hanford Setting Landform: Alluvial fans Landform position (two-dimensional): Backslope Landform position (three-dimensional): Tread Down-slope shape: Linear Across-slope shape: Linear Parent material: Alluvium derived from granite Typical profile H1 - 0 to 8 inches: sandy loam H2 - 8 to 70 inches: fine sandy loam, sandy loam H2 - 8 to 70 inches: Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat): High (1.98 to 5.95 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Salinity, maximum in profile: Nonsaline (0.0 to 2.0 mmhos/cm)

90 Custom Soil Resource Report

Available water storage in profile: Very high (about 14.5 inches) Interpretive groups Land capability classification (irrigated): 2s Land capability classification (nonirrigated): 4e Hydrologic Soil Group: A Ecological site: Loamy 9-20" (R019XD064CA)

Minor Components Greenfield Percent of map unit: 10 percent Unnamed Percent of map unit: 4 percent Unnamed Percent of map unit: 1 percent Landform: Drainageways

HcC—Hanford sandy loam, 2 to 9 percent slopes

Map Unit Setting National map unit symbol: hcf5 Elevation: 2,600 to 4,200 feet Mean annual precipitation: 9 to 12 inches Mean annual air temperature: 63 degrees F Frost-free period: 200 to 250 days Farmland classification: Prime farmland if irrigated

Map Unit Composition Hanford and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit.

91 Custom Soil Resource Report

H2 - 4 to 54 inches: sandy loam, coarse sandy loam H3 - 54 to 77 inches: H3 - 54 to 77 inches: Properties and qualities Slope: 2 to 5 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat): High (1.98 to 5.95 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 10 percent Salinity, maximum in profile: Nonsaline (0.0 to 2.0 mmhos/cm) Available water storage in profile: Very high (about 15.5 inches) Interpretive groups Land capability classification (irrigated): 2e Land capability classification (nonirrigated): 7e Hydrologic Soil Group: A Ecological site: Sandy 4-9" (R030XG022CA)

Minor Components Unnamed Percent of map unit: 10 percent Cajon Percent of map unit: 5 percent

HkA—Hesperia fine sandy loam, 0 to 2 percent slopes

Map Unit Setting National map unit symbol: hcfd Elevation: 200 to 4,000 feet Mean annual precipitation: 6 to 9 inches Mean annual air temperature: 61 to 70 degrees F Frost-free period: 225 to 310 days Farmland classification: Prime farmland if irrigated

Map Unit Composition Hesperia and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Hesperia Setting Landform: Alluvial fans Landform position (two-dimensional): Backslope

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Landform position (three-dimensional): Tread Down-slope shape: Linear Across-slope shape: Linear Parent material: Alluvium derived from granite Typical profile H1 - 0 to 4 inches: fine sandy loam H2 - 4 to 54 inches: fine sandy loam, sandy loam H2 - 4 to 54 inches: sandy loam, coarse sandy loam H3 - 54 to 77 inches: H3 - 54 to 77 inches: Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Very low Capacity of the most limiting layer to transmit water (Ksat): High (1.98 to 5.95 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 10 percent Salinity, maximum in profile: Nonsaline (0.0 to 2.0 mmhos/cm) Available water storage in profile: Very high (about 15.6 inches) Interpretive groups Land capability classification (irrigated): 2e Land capability classification (nonirrigated): 7e Hydrologic Soil Group: A Ecological site: Loamy 4-9" (R030XG021CA)

Minor Components Cajon Percent of map unit: 5 percent Rosamond Percent of map unit: 5 percent Tray Percent of map unit: 3 percent Unnamed Percent of map unit: 2 percent Landform: Playas

HkB—Hesperia fine sandy loam, 2 to 5 percent slopes

Map Unit Setting National map unit symbol: hcff Elevation: 200 to 4,000 feet Mean annual precipitation: 6 to 9 inches

100 Custom Soil Resource Report

RcA—Ramona coarse sandy loam, 0 to 2 percent slopes

Map Unit Setting National map unit symbol: hcgh Elevation: 2,700 to 3,900 feet Mean annual precipitation: 9 to 12 inches Mean annual air temperature: 63 degrees F Frost-free period: 210 to 240 days Farmland classification: Prime farmland if irrigated

Map Unit Composition Ramona and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Ramona Setting Landform: Terraces Landform position (two-dimensional): Backslope Landform position (three-dimensional): Tread Down-slope shape: Linear Across-slope shape: Linear Parent material: Alluvium derived from granite Typical profile H1 - 0 to 20 inches: coarse sandy loam H2 - 20 to 31 inches: fine sandy loam H3 - 31 to 90 inches: sandy clay loam Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.20 to 0.57 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Available water storage in profile: Moderate (about 7.8 inches) Interpretive groups Land capability classification (irrigated): 1 Land capability classification (nonirrigated): 4e Hydrologic Soil Group: C Ecological site: Loamy 9-20" (R019XD064CA)

142 Custom Soil Resource Report

Minor Components Greenfield Percent of map unit: 10 percent Hanford Percent of map unit: 4 percent Unnamed Percent of map unit: 1 percent Landform: Swales

RcB—Ramona coarse sandy loam, 2 to 5 percent slopes

Map Unit Setting National map unit symbol: hcgj Elevation: 2,700 to 3,900 feet Mean annual precipitation: 9 to 12 inches Mean annual air temperature: 63 degrees F Frost-free period: 210 to 240 days Farmland classification: Prime farmland if irrigated

Map Unit Composition Ramona and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Ramona Setting Landform: Terraces Landform position (two-dimensional): Backslope Landform position (three-dimensional): Tread Down-slope shape: Linear Across-slope shape: Linear Parent material: Alluvium derived from granite Typical profile H1 - 0 to 20 inches: coarse sandy loam H2 - 20 to 31 inches: fine sandy loam H3 - 31 to 90 inches: sandy clay loam Properties and qualities Slope: 2 to 5 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.20 to 0.57 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None

143 Custom Soil Resource Report

Frequency of ponding: None Available water storage in profile: Moderate (about 7.8 inches) Interpretive groups Land capability classification (irrigated): 2e Land capability classification (nonirrigated): 4e Hydrologic Soil Group: C Ecological site: Loamy 9-20" (R019XD064CA)

Minor Components Greenfield Percent of map unit: 10 percent Hanford Percent of map unit: 5 percent

RcC—Ramona coarse sandy loam, 5 to 9 percent slopes

Map Unit Setting National map unit symbol: hcgk Elevation: 2,700 to 3,900 feet Mean annual precipitation: 9 to 12 inches Mean annual air temperature: 63 degrees F Frost-free period: 210 to 240 days Farmland classification: Farmland of statewide importance

Map Unit Composition Ramona and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit.

144 Custom Soil Resource Report

Minor Components Greenfield Percent of map unit: 10 percent Hanford Percent of map unit: 4 percent Unnamed Percent of map unit: 1 percent Landform: Drainageways

RfB—Ramona loam, 2 to 5 percent slopes

Map Unit Setting National map unit symbol: hcgq Elevation: 2,700 to 3,900 feet Mean annual precipitation: 9 to 12 inches Mean annual air temperature: 63 degrees F Frost-free period: 210 to 240 days Farmland classification: Prime farmland if irrigated

Map Unit Composition Ramona and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Ramona Setting Landform: Terraces Landform position (two-dimensional): Backslope Landform position (three-dimensional): Tread Down-slope shape: Linear Across-slope shape: Linear Parent material: Alluvium derived from granite Typical profile H1 - 0 to 12 inches: loam H2 - 12 to 31 inches: fine sandy loam H3 - 31 to 90 inches: sandy clay loam Properties and qualities Slope: 2 to 5 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Well drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.20 to 0.57 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None

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Frequency of ponding: None Available water storage in profile: Moderate (about 8.4 inches) Interpretive groups Land capability classification (irrigated): 2e Land capability classification (nonirrigated): 4e Hydrologic Soil Group: C Ecological site: Loamy 9-20" (R019XD064CA)

Minor Components Greenfield Percent of map unit: 10 percent Hanford Percent of map unit: 5 percent

RfC—Ramona loam, 5 to 9 percent slopes

Map Unit Setting National map unit symbol: hcgr Elevation: 2,700 to 3,900 feet Mean annual precipitation: 9 to 12 inches Mean annual air temperature: 63 degrees F Frost-free period: 210 to 240 days Farmland classification: Farmland of statewide importance

Map Unit Composition Ramona and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit.

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Description of Sunrise Setting Landform: Basin floors Landform position (two-dimensional): Backslope Landform position (three-dimensional): Talf Down-slope shape: Linear Across-slope shape: Linear Parent material: Alluvium derived from granite Typical profile H1 - 0 to 19 inches: loamy fine sand H2 - 19 to 31 inches: loam H3 - 31 to 48 inches: cemented H4 - 48 to 65 inches: stratified gravelly sandy loam to loam Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: 20 to 40 inches to petrocalcic Natural drainage class: Moderately well drained Runoff class: High Capacity of the most limiting layer to transmit water (Ksat): Very low (0.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 15 percent Salinity, maximum in profile: Nonsaline to very slightly saline (2.0 to 4.0 mmhos/cm) Available water storage in profile: Low (about 3.6 inches) Interpretive groups Land capability classification (irrigated): 3s Land capability classification (nonirrigated): 7e Hydrologic Soil Group: C Ecological site: Alkali flats 4-9" (R030XG020CA)

Minor Components Unnamed Percent of map unit: 5 percent Tray Percent of map unit: 5 percent Merrill Percent of map unit: 5 percent

Sv—Sunrise sandy loam

Map Unit Setting National map unit symbol: hchk Elevation: 1,500 to 3,500 feet

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Mean annual precipitation: 5 inches Mean annual air temperature: 63 degrees F Frost-free period: 230 to 300 days Farmland classification: Farmland of statewide importance

Map Unit Composition Sunrise and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Sunrise Setting Landform: Basin floors Landform position (two-dimensional): Backslope Landform position (three-dimensional): Talf Down-slope shape: Linear Across-slope shape: Linear Parent material: Alluvium derived from granite Typical profile H1 - 0 to 19 inches: sandy loam H2 - 19 to 31 inches: loam H3 - 31 to 48 inches: cemented H4 - 48 to 65 inches: stratified gravelly sandy loam to loam Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: 20 to 40 inches to petrocalcic Natural drainage class: Moderately well drained Runoff class: High Capacity of the most limiting layer to transmit water (Ksat): Very low (0.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 15 percent Salinity, maximum in profile: Nonsaline to very slightly saline (2.0 to 4.0 mmhos/cm) Available water storage in profile: Low (about 4.3 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (nonirrigated): 7e Hydrologic Soil Group: C Ecological site: Alkali flats 4-9" (R030XG020CA)

Minor Components Tray Percent of map unit: 5 percent Merrill Percent of map unit: 5 percent Unnamed Percent of map unit: 4 percent Unnamed Percent of map unit: 1 percent

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Landform: Playas

Sw—Sunrise sandy loam, shallow

Map Unit Setting National map unit symbol: hchl Elevation: 1,500 to 3,500 feet Mean annual precipitation: 5 inches Mean annual air temperature: 63 degrees F Frost-free period: 230 to 300 days Farmland classification: Not prime farmland

Map Unit Composition Sunrise and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Sunrise Setting Landform: Basin floors Landform position (two-dimensional): Backslope Landform position (three-dimensional): Talf Down-slope shape: Linear Across-slope shape: Linear Parent material: Alluvium derived from granite Typical profile H1 - 0 to 5 inches: sandy loam H2 - 5 to 20 inches: loam H3 - 20 to 30 inches: cemented H4 - 30 to 60 inches: stratified gravelly sandy loam to loam Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: 20 to 40 inches to petrocalcic Natural drainage class: Moderately well drained Runoff class: High Capacity of the most limiting layer to transmit water (Ksat): Very low (0.00 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 15 percent Salinity, maximum in profile: Nonsaline to very slightly saline (2.0 to 4.0 mmhos/cm) Available water storage in profile: Low (about 3.2 inches) Interpretive groups Land capability classification (irrigated): 4e Land capability classification (nonirrigated): 7e Hydrologic Soil Group: C Ecological site: Alkali flats 4-9" (R030XG020CA)

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Attachment E: Regulatory Background Information

Regulatory Background Information Section 404 of the Clean Water Act (CWA) Section 404 of the CWA regulates the discharge of dredged material, placement of fill material, or certain types of excavation within “waters of the U.S.” (resulting in more than incidental fallback of material) and authorizes the Secretary of the Army, through the Chief of Engineers, to issue permits for such actions. Permits can be issued for individual projects (individual permits) or for general categories of projects (general permits). “Waters of the U.S.” are defined by the CWA as “rivers, creeks, streams, and lakes extending to their headwaters and any associated wetlands.” Wetlands are defined by the CWA as “areas that are inundated or saturated by surface or groundwater at a frequency and duration sufficient to support a prevalence of vegetation typically adapted for life in saturated soil conditions.” The Corps has adopted several revisions to their regulations in order to more clearly define “waters of the U.S.” Until the beginning of 2001, “waters of the U.S.” included, among other things, isolated wetlands and lakes, intermittent streams, prairie potholes, and other waters that are not part of a tributary system to interstate waters or to navigable “waters of the U.S.” The jurisdictional extent of Corps regulation changed with the 2001 SWANCC (Solid Waste Agency of Northern Cook County) ruling. The U.S. Supreme Court held that the Corps could not apply Section 404 of the CWA to extend their jurisdiction over an isolated quarry pit. The Court ruled that the CWA does not extend Federal regulatory jurisdiction over non-navigable, isolated, intra-state waters. However, the Court made it clear that non-navigable wetlands adjacent to navigable waters are still subject to Corps jurisdiction. Section 401 of the CWA Section 401 of the CWA requires that any applicant for a Federal permit for activities that involve a discharge to ‘waters of the State,’ shall provide the Federal permitting agency a certification from the State in which the discharge is proposed that states that the discharge will comply with the applicable provisions under the Federal Clean Water Act. Therefore, before the Corps will issue a Section 404 permit, applicants must apply for and receive a Section 401 Water Quality Certification from the RWQCB. Applications to the RWQCB must include a complete CEQA document (e.g., Initial Study/Mitigated Negative Declaration). Section 1602 of the California Fish and Game Code Section 1602 of the California Fish and Game Code requires any person, State or local governmental agency, or public utility which proposes a project that will substantially divert or obstruct the natural flow or substantially change the bed, channel, or bank of any river, stream, or lake, or use materials from a streambed, or result in the disposal or deposition of debris, waste, or other material containing crumbled, flaked, or ground pavement where it can pass into any river, stream, or lake, to first notify the CDFW of the proposed project. Notification is generally required for any project that will take place in or in the vicinity of a river, stream, lake, or their tributaries. This includes rivers or streams that flow at least periodically or permanently through a bed or channel with banks that support fish or other aquatic life and watercourses having a surface or subsurface flow that support or have supported riparian vegetation. Based on the notification materials submitted, the CDFW will determine if the proposed project may impact fish or wildlife resources. If the CDFW determines that a proposed project may substantially adversely affect existing fish or wildlife resources, a Lake or Streambed Alteration Agreement (SAA) will be required. A completed CEQA document must be submitted to CDFW before a SAA will be issued.

Attachment F: Wetland Indicator Status of Plant Species Observed in the Study Area

Plant Species Observed Within the Study Area Wetland Latin Name Common Name Abundance Indicator Status VASCULAR PLANTS ASTERACEAE ASTER FAMILY Ambrosia acanthicarpa Annual sandbur Uncommon -- Chaenactis sp. Unid. Pincushion Scarce -- Chrysothamnus nauseosus Common rabbitbrush Occasional -- Lasthenia californica California goldfields Common FACU Lasthenia gracilis Needle goldfields Occasional -- Lessingia glandulifera var. peirsonii Peirson's lessingia Uncommon (?) -- Lessingia filaginifolia Chaparral aster Uncommon -- * Matricaria discoidea Pineapple weed Uncommon FACU BORAGINACEAE BORAGE FAMILY Amsinckia tessellata Checker fiddleneck Abundant -- Cryptantha circumscissa Cushion cryptantha Scarce -- Pectocarya penicillata Winged pectocarya Uncommon -- Plagiobothrys arizonicus Arizona popcornflower Uncommon -- BRASSICACEAE MUSTARD FAMILY * Capsella bursa-pastoris Shepherd's purse Scarce FACU * Descurainia sophia Flixweed, tansy mustard Occasional -- Lepidium nitidum Shining pepper grass Uncommon FAC * Sisymbrium irio London rocket Common -- Tropidocarpum gracile Slender tropidocarpum Common -- CHENOPODIACEAE GOOSEFOOT FAMILY Atriplex canescens Four-winged saltbush Common -- Atriplex polycarpa (?) Unid. saltbush Scarce FACU * Salsola tragus Russian thistle, tumbleweed Occasional FACU FABACEAE PEA FAMILY Lupinus bicolor Miniature lupine Common -- * Robinia pseudoacacia Black locust Uncommon FACU GERANIACEAE GERANIUM FAMILY * Erodium cicutarium Red-stemmed filaree Abundant -- MALVACEAE MALLOW FAMILY Eremalche exilis White mallow Scarce --

Plant Species Observed Within the Study Area Wetland Latin Name Common Name Abundance Indicator Status ONAGRACEAE EVENING PRIMROSE FAMILY Camissonia campestris Field evening primrose Occasional -- Chylismia claviformis Clavate fruited primrose Scarce -- Oenothera californica California evening primrose Uncommon -- OROBANCHACEAE BROOMRAPE FAMILY Castilleja exserta Owl’s clover Scarce -- PAPAVERACEAE POPPY FAMILY Eschscholzia californica California poppy Common -- POLEMONIACEAE PHLOX FAMILY Gilia tricolor (?) Tricolor gilia Occasional -- POLYGONACEAE BUCKWHEAT FAMILY Eriogonum brachyanthum Yellow Buckwheat Scarce -- SOLANACEAE NIGHTSHADE FAMILY Lycium cooperi (?) Peach desert thorn Uncommon -- TAMARICACEAE TAMARISK FAMILY * Tamarix aphylla Athel tree Occasional FAC ULMACEAE ELM FAMILY * Ulmus minor (?) English elm Uncommon -- LILIACEAE LILY FAMILY Dichelostemma capitata Wild hyacinth Uncommon -- POACEAE GRASS FAMILY * Arundo donax Giant reed Scarce FACW * Bromus tectorum Cheat grass Common -- * Hordeum murinum Hare barley Common FACU * Schismus barbatus Mediterranean schismus Uncommon -- Stipa sp. Unid. needlegrass Scarce -- * Vulpia myuros Annual fescue Uncommon FACU Alien species are indicated by asterisk, special status species indicated by two asterisks. This list includes only species observed within the Vegetation Study Area. Others may have been overlooked or unidentifiable due to season. Plants were identified using keys, descriptions, and illustrations in Munz (1974) and Baldwin et al (2012). Taxonomy and nomenclature generally follow Baldwin et al. Vouchers, indicated by Justin Wood's collection numbers, will be deposited at Rancho Santa Ana Botanic Garden.

Attachment G: Federal Non-Wetland/Wetland Waters Indicator Information

Table 1. Potential Geomorphic Indicators of Ordinary High Water Marks for the Arid West (A) Below OHW (B) At OHW (C) Above OHW 1. In-stream dunes 1. Valley flat 1. Desert pavement 2. Crested ripples 2. Active floodplain 2. Rock varnish 3. Flaser bedding 3. Benches: low, mid, most prominent 3. Clast weathering 4. Harrow marks 4. Highest surface of channel bars 4. Salt splitting 5. Gravel sheets to rippled sands 5. Top of point bars 5. Carbonate etching 6. Meander bars 6. Break in bank slope 6. Depositional topography 7. Sand tongues 7. Upper limit of sand-sized particles 7. Caliche rubble 8. Muddy point bars 8. Change in particle size distribution 8. Soil development 9. Long gravel bars 9. Staining of rocks 9. Surface color/tone 10. Cobble bars behind obstructions 10. Exposed root hairs below intact soil 10. Drainage development 11. Scour holes downstream of layer 11. Surface relief obstructions 11. Silt deposits 12. Surface rounding 12. Obstacle marks 12. Litter (organic debris, small twigs and 13. Stepped-bed morphology in leaves) gravel 13. Drift (organic debris, larger than twigs) 14. Narrow berms and levees 15. Streaming lineations 16. Desiccation/mud cracks 17. Armored mud balls 18. Knick Points

Table 2. Potential Vegetation Indicators of Ordinary High Water Marks for the Arid West (D) Below OHW (E) At OHW (F) Above OHW Hydroriparian 1. Herbaceous marsh species 1. Annual herbs, hydromesic 1. Annual herbs, xeric ruderals indicators 2. Pioneer tree seedlings ruderals 2. Perennial herbs, non-clonal 3. Sparse, low vegetation 2. Perennial herbs, 3. Perennial herbs, clonal and 4. Annual herbs, hydromesic hydromesic clonals non-clonal co-dominant ruderals 3. Pioneer tree seedlings 4. Mature pioneer trees, no 5. Perennial herbs, hydromesic 4. Pioneer tree saplings young trees clonals 5. Mature pioneer trees w/upland species 6. Late-successional species Mesoriparian 6. Pioneer tree seedlings 5. Sparse, low vegetation 7. Xeroriparian species Indicators 7. Sparse, low vegetation annual herbs, hydromesic 8. Annual herbs, xeric ruderals 8. Pioneer tree saplings 6. ruderals 9. Perennial herbs, non-clonal 9. Xeroriparian species 7. Perennial herbs, 10. Perennial herbs, clonal and hydromesic clonals non-clonal codominent 8. Pioneer tree seedlings 11. Mature pioneer trees, no 9. Pioneer tree saplings young trees 10. Xeroriparian species 12. Mature pioneer trees, xeric 11. Annual herbs, xeric understory ruderals 13. Mature pioneer trees w/upland species 14. Late-successional species 15. Upland species Xeroriparian 10. Sparse, low vegetation 12. Sparse, low vegetation 16. Annual herbs, xeric ruderals indicators 11. Xeroriparian species 13. Xeroriparian species 17. Mature pioneer trees 12. Annual herbs, xeric 14. Annual herbs, xeric w/upland species ruderals ruderals 18. Upland species

Table 3. Summary of Wetland Indicator Status Category Probability Obligate Wetland OBL Almost always occur in wetlands (estimated probability >99%) Facultative Wetland FACW Usually occur in wetlands (estimated probability of 67–99%) Facultative FAC Equally likely to occur in wetlands/non-wetlands (estimated probability of 34–66%) Facultative Upland FACU Usually occur in non-wetlands (estimated probability 67–99%) Obligate Upland UPL Almost always occur in non-wetlands (estimated probability >99%) Non-Indicator NI No indicator status has been assigned Source: Reed, 1988; USFWS, 1997; USACE, 2012.

Table 4. Wetland Hydrology Indicators* Primary Indicators Secondary Indicators Watermarks Oxidized Rhizospheres Associated with Living Roots Water-Borne Sediment Deposits FAC-Neutral Test Drift Lines Water-Stained Leaves Drainage Patterns Within Wetlands Local Soil Survey Data *Table adapted from 1987 USACE Manual and Related Guidance Documents.

Table 5. Wetland Hydrology Indicators for the Arid West* Primary Indicator (any one Secondary Indicator (two or more indicator is sufficient to make a indicators are required to make a determination that wetland determination that wetland hydrology is present) hydrology is present) Group A – Observation of Surface Water or Saturated Soils A1 – Surface Water X A2 – High Water Table X A3 – Saturation X Group B – Evidence of Recent Inundation B1 – Water Marks X (Non-riverine) X (Riverine) B2 – Sediment Deposits X (Non-riverine) X (Riverine) B3 – Drift Deposits X (Non-riverine) X (Riverine) B6 – Surface Soil Cracks X B7 – Inundation Visible on Aerial Imagery X B9 –Water-Stained Leaves X B10 – Drainage X X B11 – Salt Crust X B12 – Biotic Crust X B13 – Aquatic Invertebrates X Group C – Evidence of Current or Recent Soil Saturation C1 – Hydrogen Sulfide Odor X C2 – Dry-Season Water Table X C3 – Oxidized Rhizospheres along Living X Roots Table 5. Wetland Hydrology Indicators for the Arid West* Primary Indicator (any one Secondary Indicator (two or more indicator is sufficient to make a indicators are required to make a determination that wetland determination that wetland hydrology is present) hydrology is present) C4 – Presence of Reduced Iron X C6 – Recent Iron Reduction in Tilled Soils X C7 – Thin Muck Surface X C8 – Crayfish Burrows X C9 – Saturation Visible on Aerial Imagery X Group D – Evidence from other Site Conditions or Data D3 – Shallow Aquitard X D5 – FAC-Neutral Test X *Table adapted from Regional Supplement to the USACE of Engineers Wetland Delineation Manual: Arid West Region, Version 2.0.

Table 6. Field Indicators of Hydric Soil Conditions* 1. Indicators of Historical Hydric Soil Conditions 2. Indicators of Current Hydric Soil Conditions a. Histosols a. Aquic or peraquic moisture regime (inundation and/or soil b. Histic epipedons; saturation for *7 continuous days) c. Soil colors (e.g., gleyed or low-chroma colors, b. Reducing soil conditions (inundation and/or soil saturation soils with bright mottles (Redoximorphic for *7 continuous days) features) and/or depleted soil matrix c. Sulfidic material (rotten egg smell) d. High organic content in surface of sandy soils e. Organic streaking in sandy soils f. Iron and manganese concretions g. Soil listed on county hydric soils list *Table adapted from 1987 USACE Manual and Related Guidance Documents.

Table 7. Hydric Soil Indicators for the Arid West*

Hydric Soil Indicators Hydric Soil Indicators All Soils Sandy Soils Loamy and Clay Soils for Problem Soils** A1 – Histosol S1 – Sandy Mucky Mineral F1 – Loamy Mucky Mineral A9 – 1 cm Muck A2 – Histic Epipedon S4 – Sandy Gleyed Matrix F2 – Loamy Gleyed Matrix A10 – 2 cm Muck A3 – Black Histic S5 – Sandy Redox F3 – Depleted Matrix F18 – Reduced Verti A4 – Hydrogen Sulfide S6 – Stripped Matrix F6 – Redox Dark Surface TF2 – Red Parent Material A5 – Stratified Layers — F7 – Depleted Dark Surface Other (See Section 5 of Regional Supplement, Version 2.0) A9 – 1 cm Muck — F8 – Redox Depressions — A11 – Depleted Below — F9 – Vernal Pools — Dark Surface A12 – Thick Dark Surface — — — * Table adapted from Regional Supplement to the USACE of Engineers Wetland Delineation Manual: Arid West Region, Version 2.0. ** Indicators of hydrophytic vegetation and wetland hydrology must be present.