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CDP 07-13; BATIQUITOS INTERCEPTOR SEWER REHABILITATION; BIOLOGICAL ASSESSMENT; 2008-04-29
I I I I I I I I I I I I I II I I I I I FINAL DRAFT BIOLOGICAL ASSESSMENT FOR THE NORTH BATIQUITOS INTERCEPTOR SEWER IM:PROVEMEl\lS PROJECT CARLSBAD, CALIFORJ\TIA CITY PROJECT NO. 3538 April 29, 2008 Prepared for: City of Carlsbad 1635 Faraday Avenue Carlsbad, California Prepared by: PLANNING SYSTEMS 1530 Faraday Avenue Suite 100 Carlsbad, CA 92008 II I I-II LAA"D USE/COASTAL PLAl'Ic1'l."'ING PLAArmNG LAA"DSCAPE ARCHITECTURE· LA3900 SYSTEMS POLICY AND PROCESSING ENVIRONMEl'Ii'TAL T\nTIGATION Habitat Type and SF of Possibj~ Temporary Impacts Sensitive eSM ess DEV DIS EXO AG NNG FM SWS Manhole Nos. 22 XX XX XX 24 XX XX XX 26 XX XX 29 XX 30 XX XX 31 XX XX XX XX 32 XX XX 34 XX 36 XX XX 41 XX XX 46 XX XX XX XX 47 XX XX XX 48 XX XX 54 XX XX 55 XX 56 XX XX 57 XX XX XX 58 XX XX 59 XX XX 60 XX CSM Coastal Salt Marsh EXO Exotic CSS Coastal Sage Scrub AG Agricultural DEV Developed FM Freshwater Marsh DIS Disturbed SWS Southern Willow Scrub , . 1530 FARADAY AVENUE· SUITE 100· CARLSBAD, CA 92008· (760) 931-0780· FAX (760) 931-5744· info@pIanningsystems.net I I I I I I I I I I I I I I I I I I I Final Draft BIOLOGICAL ASSESSMENT FOR THE NORTH BATIQUITOS INTERCEPTOR SEWER Th1PROVEMENTS PROJECT CITY PROJECT NO. 3538 CarlsbacL California April 29, 2008 Table of Contents 1.0 PROJECT SUMMARY 2.0 ENVIROl\1MENTAL SETTING Al,\l]) SURROlThl])ING LMl]) USES ........ . 3.0 REHABILITATION CONSTRUCTION METHODOLOGy ...................... . 4.0 VEGETATION RESOURCES .......................................................... . 4.1 Vegetation Survey Methodology ................................................ . 4.2 Freshwater Marsh ................................................................. . 4.3 Diegan Coastal Sage Scrub ....................................................... . 4.4 Developed Lands ................................................................. .. 4.5 Disturbed Lands .................................................................... . 4.6 Exotic Lands ........................................................................ . 4.7 Non-native Grasslands ............................................................ . 4.8 Southern Coastal Salt Marsh .................................................... .. 4.9 Riparian Scrub ..................................................................... . 5.0 SENSIThT£ HABITATS AND SENSITIVE SPECIES ............................ ,. 5.1 Sensitive Habitats ................................................................. . 5.2 Sensitive Plant Species ........................................................... . 6.0 PROJECT IMPACTS .................................................................................. . Table 1 -Plant Species Potentially Present in the Project Area .............. . 6.1 Direct hnpacts to Habitat ........................................................ , 6.2 Direct Impacts to Wildlife ........................................................ . 6.3 Indirect Impacts .................................................................... . 7.0 JURISDICTIONAL RESPONSmILITIES .................................................... .. 7.1 U.S. Army Corps of Engineers ................................................... . 7.2 California Regional Water Quality Control Board .......................... . 7.3 California Department ofFish and Game ....................................... . 8.0 PROJECT :r..flTIGATION ............................................................................. .. 8.1 HMP Conservation Setting Compliance ...................................... . 8.2 MItigation Measures .............................................................. . 9.0 REFERENCES .............................................................................................. . Figure 1-Vicinity Map ......................................................... . Figures 2-6 -Preliminary Vegetation and Impacts Assessment Maps ..... . Appendix A -Plants of the North Batiquitos Sewer Improvements Project page 1 page 3 page 3 page 4 page 4 page 5 page 5 page 5 page 6 page 6 page 6 page 7 page 7 page 7 page 7 page 8 page 8 page 9 page 11 page 13 page 13 page 13 page 13 page 14 page 14 page 14 page 14 page 15 page 18 page 19 pages 20-24 I I I I I I I I I I I I I I I I I I I Final Draft BIOLOGICAL ASSESSMENT For The North Batiquitos Interceptor Sewer Improvements Carlsbad, CA City Project No. 3538 April 29 , 2008 1.0 Project Summary The proposed project involves the repair and rehabilitation of forty-three (43) existing sewer manholes 1l{hich are located at intervals along an existing sewer interceptor line bernTeen Gabbiano Lane and El Camino Real in Carlsbad (Figure 1). The length totals approximately 1.9 miles. Batiquitos Lagoon is located immediately south of the project area. The sewer interceptor conveys wastewater for the majority of development in the southwest quadrant of the city of Carlsbad. The rehabilitation is necessary due to the fact that the \Tertical concrete manhole structures have reached the approximate en d of their usefu1life, have become corroded over years of deterioration, and are in danger of collapse. This report describes the scope of the project, inventories habitats in the project area, assesses biological impacts, and proposes mitigation measures to reduce impacts to a level of insignificance. 1.1 Project Description The permanent work of the project \",rill occur entirely within the interior of the manhole, but temporary access to each manhole site and use of land adjacent to each manhole is necessary to accomplish the work, and to stage equipment and materials. The work area that has the greatest potential to significantly impact habitats occurs immediately adjacent to each manhole, where workers supporting the re-lining activity will stage equipment and assist vdth the work. This intensive work \\rill be contained within a five ft. radius area, to be referred to in this report as the Immediate 'Nork Zone (IWZ). Vehicles used to access and support the work shall operate primarily on existing decomposed granite trails, dirt trails, and asphalt roads. On the eastern end of the project, manholes are accessed via an access road that is in some places reverting to native habitat. Vehicular access to manholes #56 to #59 must utilize measures proposed to protect this re-establishing habitat. The project also includes ongoing, regular maintenance of the manholes and below- ground sewer interceptor line. This maintenance will include general condition inspection and minor repair, video pipeline inspection and pipeline cleaning. General condition inspection and min.or repair will occur approximately tvw times per year, and ",rill involve removing the manhole covers and entry into the manholes for minor repairs or removal of debris. Video inspection requires a ccess to or near the manholes with a box truck or van, inserting a video camera into the interceptor and running the camera Biological Assessment -North Batiquitos Interceptor Sewer Improvements, 4-29-08 1 I I I I I I I I I I I I I I I I I I I up or dov",nstream until the next manhole to review for leaks or blockages. This would occur at least once every five years, but not more than once per year. Pipeline cleaning involves heal"y vactor and ·wat~r trucks parked as close as convenient to the manholes, but still parked within the trail access areas (the range is 1000 linear feet from the hole). Since both sensitive and non-sensitive vegetation exists in an irregular mosaic across the landscape of the north shore of Batiquitos Lagoon, the project proponent has agreed that specific access routes for ,,,,Torkers and machlnery to manholes from the improved trails will be identified prior to conducting scheduled maintenance activities. The routing , .. ill be identified and defined by a qualified biologist through on-site observation immediately prior to conducting the maintenance activities. The occasional schedule of this maintenance and this identification of non-impacting access routing is considered a substantive aspect of the maintenance program which ""ill sente to ensure that the ongoing maintenance does not result in any permanent impacts to sensitive biology in the area. 1.2 Assessment Methodology and Findings To assess the projects potential biological impacts, a survey of vegetation \\'as conducted in a 30 ft radius around each manhole, and along access routes to each manhole. All project '''lork will occur on lands surveyed by the project, or on lands that support development, or are maintained as developed lands such as the l\.·furphy property. Habitats occurring ,,,,"ithin or accessing the 3D-foot radius survey zone of each manhole include: coastal sage scrub, developed lands, disturbed lands, exotic lands, and non- native grassland, southern coastal salt marsh, freshwater marsh and riparian scrub. No permanent project related impacts to sensitive upland or wetland habitats ",,"ill occur provided that construction and maintenance of the project is accomplished per the proposed plan and per the recommendations of this report. The work necessary may cause minor superficial and temporary disturbance veget ation near each manhole, such as crushing of vegetation and minor pruning. However, no significant impacts are anticipated, because no sub-surface work that would kill roots ,,,,"ill occur. Complete re- growth of all crushed or pruned vegetation is expected to occur during the first rainy season following the work. No project related impacts to non-sunTeyed areas are expected to occur due to project work. Habitat Management Plan (HMP) listed sensitive plant species occur along the north shore of the Batiquitos Lagoon, however no HMP listed sensitive plant species \vere identified during field investigations in the immediate areas of project work. No significant impacts to sensitive plant species are anticipated as a result of the proposed project. Biological Assessment -North Batiquitos Interceptor Sewer Improvements, 4-29-08 2 I I I I I I I I I I I I I I I I I I I Wildlife surveys were not conducted for this report because the area has been repeatedly surveyed by the Batiquitos Lagoon Foundation and the Port of Los Angeles as part of the Batiquitos Lagoon Enhancement Project. Sensitive bird species are knO"\VI1 to occupy habitats along the north shore of Batiquitos Lagoon. The avian species most closely associated "\'\'ith a habitat likely to be temporarily impacted by the project is the coastal California gnatcatcher (CAGN). No impacts to CAGN are anticipated to occur provided recommended project measures are implemented. In summary, no significant, direct project related impacts ·will occur provided that recommended construction procedures and methods are utilized. Hm\7ever, indirect impacts have the potential to occur due to construction noise. The high pressure water pump to be used to clean the interior surface of each manhole is anticipated to produce noise above 60 dBA at the source point. Therefore, Significant impacts due to noise have the potential to occur unless measures are implemented to control noise. 2.0 EnvironmenW Setting and Surrounding Land Uses The North Batiquitos Interceptor SelNer is an existing sewer pipeline system which ,vas constructed in 1974. The interceptor sewer conveys wastewater for the majority of development in the southwest quadrant of the City of Carlsbad. This project includes that portion of the interceptor along the north shoreline of the Batiquitos Lagoon, between El Camino Real and Gabbiano Lane, a distance of approximately 1.9 miles. Oty staff has completed an inspection and assessment of the system finding many of the manhole structures have reached the end of their useful life and are in need of replacement or rehabilitation. These concrete structures are severely corroded as a result of their e.xposure to the acidic environment of the sewer system. There are significa nt issues vvith ground water infiltration through the corroded structure walls and if manhole remediation is not accomplished, there is potential for partial or entire structural collapse of the corroded manholes. The project is comprised of forty-three (43) manholes. One of the manholes is located in the CM:\VD pump station at the western terminus of the project, hventy are located on or adjacent to the public trail along the north shore of the lagoon, eight are located on the A ·viara golf course, five are on the Murphy property, seven are on the Mitsuuchi property, one is on property mvned by the State of California, and the one is located in the RO.W. of a public street on the eastern terminus of the project. 3.0 Rehabilitation Construction Methodology Manholes v.il1 be rehabilitated using a non-excavation, low-impact work method designed to eliminate direct impacts to surrouncling habitat. To the degree pOSSible, access to the manholes will. be via the existing public trail and dirt roads that are located along or near the trunk line. Vehicles used to support the work will be restricted from areas that could be significantly impacted. Low impact vehicles v..ith rubber tires "will be Biological Assessment -North Batiquitos Interceptor Sewer Improvements, 4-29-08 3 I I I I I I I I I I I I I I I I I I I used, and as necessary all-terrain vehicles with balloon tires may be used at the eastern end of the project to access manholes AH #57 to AH #60. The interior of each manhole 'will be cleaned with a high pressure hose. The cleaned manhole \vill then be lined (walls and bottom) with a fiberglass reinforced epm.,}7liner, which adheres to the cleaned interior v\rith resin. No excavation, grading, or movement of soil ",rill be required for implementation of the rehabilitation project. Specifically, the anticipated manhole rehabilitation ,,70rk is as follows: 4.0 1. Vehicles and personnel \\rill access manhole sites via established road or trails. 2. The interior of each manhole will be cleaned with either a high pressure hose or by physically chipping off hard deposits by hand. 3. The primary \'\'ork of the project is to re-line the interior surface of the manhole with a liner. The liner will be adhered to the manhole's interior sides with glue. A work area measuring approximately 16' X 8' ",rill be utilized to layout the liner and apply the glue. This work ",ill be performed on the existing dirt road or nearby disturbed lands. In manhole locations where sensitive vegetation occurs, the liner layout area ,,,rill be sited in a place where the work can occur without impacting sensitive habitat. 4. The liner v,rill be hand carried to the manhole, and installed using a tripod de,rice and hose equipment. The tripod de,rice ",rill be positioned over the top of the open manhole opening. Hoses utilized in the work process \\rill be connected to machinery positioned as near or as distant as necessary to avoid impacts to surrounding habitat. Personnel ",rill assist by performing ,vork around the edge of the manhole. This ,vork can be accomplished within a variable footprint, such that sensitive vegetation can be protected. The maximum size of the footprint around a manhole necessary to assist in the interior manhole work has been determined to be a five-foot radius around the manhole (for this report to be known as the Immediate Work Zone (IWZ»). Vegetation Resources Field work to classify habitat and inventory plants present was conducted on December 1 and December 4, 2006, using and engineered base with topography, and a recent color aerial photo of the site, plotted with manhole locations. Each manhole location and the access to each manhole was traversed on foot. Vegetation within a 30 ft. radius of each manhole and potential vehicular access to each manhole was identified and classified by plant association. 4.1 Vegetation Survey Methodology This project is the sum of 43 small work areas, with a connected access between them. Classification of a band of habitat along the entire 1.9 mile length of the project is not Biological Assessment -North Batiquitos Interceptor Sewer Improvements, 4-29-08 4 I I I I I I I I I I I I I I I I I I I necessary to inventory that portion of existing habitat ,\ ... ith the potential to be impacted. Therefore, we have inventoried and assessed ha bitats within tl:rirty feet of each manhole and the preferred access routes to each manhole. The 43 manhole sites happen to include all plant associations occurring along the 1.9 mile North Batiquitos Interceptor Sewer easement, so all plants and animals with the potential to in these associations ""ill be addressed. Classification of plant associations shall follow City of Carlsbad Habitat Management Plan designations. All plant species were recorded. Sensitive plant habitats such as clay beds, indicator species, sandstone, mesic and xeric slope aspects were sought. Plant names follow the most recent botanical Iiterature: (Rebman and Simpson, 2006), and (Hickman, 1993); plant identification was determined in the field and lab using: (Hickman, 1993), (Munz, 1974), (Beauchamp, 1986), (Abrams, 1960), (Mason, 1957); plant communities are classified according to (Sa'\",",)'er and Keeler-\VoIf, 1995), (Holland, 1986), and (Gordon and \Vhite, 1994); status of sensitive plants were eyaluated according to: (Skinner and Pavlik, 1994) and soil surveys, (Bowman, 1973). Vegetation resources ·were surveyed and are described by Greg Evans, restoration ecologist. Site vegetation is classified based on dominant species present, existing soils, and if the vegetation is disturbed, the degree and type of disturbance. Plant communities occurring on-site include: Freshwater Marsh (FM) Diegan coastal sage scrub (CSS) Developed Lands (DEV) Disturbed Lands (DIS) Exotic Lands (EXO) Non-native grassland (NNG) Southern coastal salt marsh (CSM) Riparian Scrub (SWS) 4.2 Freshwater Marsh (FM) Coastal and valley freshwater marsh is an emergent vegetation association occurring typically in low-lying areas fed by fresh,\·\tater. On the project site, F11 is located where storm drains outfall and where freshwater is seeping onto low lying areas. The dominant species of FM observed is Broad-leaved cattail (Typha latifolia). FM is emerging in a particularly low-lying area of the sewer line easement road on the :Mitsuchii Property at the eastern end of the project. Biological Assessment -North Batiquitos Interceptor Sewer Improvements, 4-29-08 5 I I I I I I I I I I I I I I I I I I I 4.3 Diegan Coastal Sage Scrub (CSS) Coastal sage scrub in the project area is strongly influenced by the presence of water and salt. On upper elevations of the project site, Coast sagebrush (Artemesia californica) often dominates, occurring ,,,,Tjth other typical associates such as Flat-top buckwheat (Eriogonurn fasciculatum), and Black sage (Salvia Melifera). But in lower elevations of the project site, a pioneering phase of CSS is encountered, where Coast golden bush (Isocoma menziesii) often occurs in monotypic stands. In one project location, Coyote brush (Baccharis pilularis) is the dominant CSS species occurring in an area where eroded sediments have collected. 4.4 Developed Lands (DEV) Areas are designated "Developed lands" when the soil surface is covered by an impermeable material such as concrete. On-site, concrete walks and streets are identified as developed. 4.5 Disturbed Lands (DIS) Areas are designated "Disturbed Lands" when over 50% of the soil surface supports no vegetation. On-site, trails and roads eAl'osing bare soil, and lands intentionally manicured to remain bare are identified as disturbed lands. 4.6 Exotic Lands (EXO) Exotic lands are characterized by the predominance of ornamental vegetation and other non-natives. On-site, the golf course and other ornamental landscapes occupied by species such as Eucalyptus (Eucalyptus sp.), Hottentot Fig (Carpobrotus edulis), Acacia (Acacia sp.), Pine (Pinus sp.), and Turf (Festuca hybrid) are identified as exotic lands. 4.7 Non-native Grassland) (NNG) Non-native grassland is characterized by annual grasses such as wild oats, bromes, and others. This vegetation type is not considered a sensitive habitat, however in some locations it may be a significant resource for r aptor foraging. Non-native grassland occurs in upland areas where natural habitat have been severely disturbed in the past. On the project site, NNG occurs on a variety of disturbed sites, as the under-story of Eucalyptus woodlands, and on sites in private ownership that are permanently "maintained" to non-native grassland. Typical species observed include brome grasses (Bromus sp.), Mustards (Hirsfeldia Spa and Brassica sp.), 'Wild radish (Raphanus sp.), among many others. The only re-emerging native of note in areas characterized in this report as NNG is Coast Goldenbush (!socoma menziesii var. vernonioides). Biological Assessment -North Batiquitos Interceptor Sewer Improvements, 4-29-08 6 I I I I I I I I I I I I I I I I I I I 4.8 Southern Coastal Salt Marsh (CSM) Southern coastal salt marsh is a ,,,'etland community that principally occurs :in 10'''' ly:ing areas where sal:ine conditions occur. The plants of this association are low grovv:ing, often herbaceous species. The principal CS:M species grm·v:ing :in the project area are PickIeweed (Salicornia vil'giniana), Alkali heath (Fl'ankenia salina), and Saltgrass (Distichlis spicata). Each of these species can be the dom:inant plant of the association when encountered. Other associates observed include Alkali 'weed (Cressa tru:xillen.sis), Alkali- mallow (Malvella leprosa), and Alkali heliotrope (Heliotropum cumssavicum). Southwestern spiny-rush (funcus acutis spp. leopaldii), occurs as scattered :individuals associated with other CSM species. 4.9 Riparian Scrub (SWS) In one location. manhole AH #46. riparian scrub species supported by storm water runoff occur v..ithin 30 ft. of a manhole. Dornjnant species include Arroyo willo\,' (Salix lasiolepis) and Mulefat (Baccharis salisifolia). 5.0 Sensitive Habitats and Sensitive Species The forty-three manhole sites and access to these sites support southern coastal salt marsh, coastal sage scrub, freshwater marsh, non-native grassland and riparian scrub, all plant associations considered sensitive:in Carlsbad. Outside of the surveyed 30 ft. radius around each manhole, non-''Iretland and wetland Waters of the u.s occur. No vernal pools were identified:in the project vicinity. No plants considered sensitive per the Carlsbad m1P were identified as occurring with:in the surveyed 30 ft. radius around each manhole. No animal surveys were conducted for this project. 5.1 Sensitive Habitats Project manhole sites support two protected upland associations, Diegan coastal sage scrub, and non-native grassland. Coastal sage scrub is considered a sensitive habitat because it can support the Federally-threatened Coastal California gnatcatcher. Non- native grassland is protected because it may be utilized for foraging by raptor species considered sensitive, threatened, or rare. Project related impacts to coastal sage scrub 'would require mitigation measures to reduce impacts to a level of insignificance. Project related impacts to non-natiye grassland may require the payment of a fee per the Carlsbad Habitat Management Plan. Project manhole sites also support three sensitive wetland associations, southern coastal salt marsh, freshwater marsh, and riparian scrub. CSM is an association utilized by Beld:ing's savannah sparrow. Freshwater marsh is an association knov\'n to be utilized by Clapper rail and several other shore birds. Southern 'willow scrub is knO\\'l1 to be utilized Biological Assessment -North Batiquitos Interceptor Sewer Improvements, 4-29-08 7 I I I I I I I I I I I I I I I I I I I by Least Bell's vireo and other birds. Project related impacts to these wetland plant communities would require mitigation measures to reduce project related impacts to a level of insignificance. However, no mitigation is required beca use no habitat will be permanently impacted, and any vegetation damage is anticipated to be superficial and of short term duration. 5.2 Sensitive Plant Species No plant species listed as sensitive :in the Carlsbad HlvIP were observed vdth:in 30 feet of a manhole. 1his survey was conducted during the ·winter, a time of year when most but not all rare plants kno"\\"'n to occur locally ·would be visible above-grade. Several HMP protected forbs are dormant over-winter, and could have gone undetected during the "inter survey. Though a negative find:ing has not been made for several HMP listed species during the project survey, in practical terms this find:ing is not significant, because the proposed project will not disturb soil below-grade, and will be scheduled to occur outside of spring/early summer when flower:ing and vegetative growth of these species occurs. Because no root damage or disturbance to HMP listed species will occur as a result of the project, no significant impacts are anticipated to occur. Therefore it is concluded that spr:ingtime surveys are not necessary because proposed project activities will not result in plant mortality. Table 1 provides a list of sensitive plant species sought and the find:ings. 6.0 Project Impacts The primary work of the project occurs inside of the 43 existing manhole structures. However, to accomplish this v'lOrk, equipment and personnel must access the manholes to perform various tasks. The v\,rork to be accomplished can be divided :into four categories based on the :intensity of work activity and the potential for the ,,,ork to impact biological resources: 1. ·Work Inside a :Manhole -this work has no potential to impact habitat because all work is occurring in the "developed" structure itself. Work inside the manhole "ill not create significant noise impacts. 2. Immediate "\Vork Zone -the immediate work zone is defined as work occurring within a 5 foot radius (78.5 if) of each manhole. The existing habitats in this zone \\ill be directly affected by the support personnel assisting workers inside the manhole and the equipment used to assist the work. :Minor crushing of vegetation and pruning of vegetation is necessary to access and to accomplish the required work in the I\VZ of some manholes. Work in the I,VZ has the potential to impact habitats unless the work is conducted in a manner that avoids significant impacts. \Vork occurring in the l\VZ also has the potential to impact nesting birds. 3. Staging Areas -stag:ing areas are a) locations where vehicles are parked, and b) work areas remote from the manhole such as the liner gluing station. Provided that staging areas are chosen in non-sensitive habitats, work in this zone will not Biological Assessment -North Batiquitos Interceptor Sewer Improvements, 4-29-08 8 ------------------- TABLE 1. SENSITIVE AND PROTECTED PLANT SPECIES POTENTIALLY PRESENT IN THE PROJECT AREA Latin Name Common Name Fed State HMP Habitat Occurrence Potential for Occurrence Status Status Status PLANTS Acanthomintha iliclfolia San Diego thom-mint FT SE Narrow Chprl, CoScr, Absent Low, no vernal pools observed, specific Endemic VFGrs, VnPls soil type does not occur on-site Ambrosia pumila San Diego ambrosia none none Narrow CoScr, RpWld Absent Low, minimal, readily-observable Endemic habitat on-site Arctostaphylos g. ssp. Del Mar manzanita FE none Narrow Chprl Absent Low, habitat does not occur on-site crasslfolla Endemic Baecharis vanessae Encinitas baccharis FT SE Narrow Chprl Absent Low, No populations known in Carlsbad Endemic Brodiaea filifolla Thread-leaf bradiaea FT SE Narrow Medws, VFGre, Absent Low, no vernal pools observed, on-site Endemic VnPls grassland occurs due to disturbance, not because of soil type Brodlaea oreutti Otcutfs Bradiaea none none Narrow CCfrs, Chprl, Absent Low, no vernal pools observed, on-site Endemic CmWld, Medws, grassland occurs due to disturbance, BVFGrs, VnPls not because of soil type Ceanothus verrucosus Coast white lilac FSC none Listed Chprl Absent Low, habitat does not occur on-site Chorizanthe orcuttlana Orout's spineRower FE CE Narrow CoSer Absent Low, outside of known range Endemic Comarostaphylis d. Summer Holly FSC none Listed Chprl Absent Low, habitat does not occur on-site ssp. dlversifolia 1--Del Mar Mesa sand Narrow Chprl, CoSer High, site intensively searched, not Corethrogyne none none Absent fIIaglnlfolia var. linlfolia aster Endemic present Dudleya blochmaniae Blochman's dudleya FSC SE Narrow CoScr Absent Low to moderate, no concretions ssp. blochmanlae Endemic observed on site -----'-- Ahhreviations: FE -: Fedrally Endangered: FT = Federally Threatened; FSC = Federal Spccics of Special Concern; SE " California ESA Endangered: NE "" HMP Narrow Endemic Listed ~ conservation encouraged by HMP, but not recommended for the heightened protection afforded Narrow Endemic species. IIahitnl Codes: Per California Native Plant Society's Rare and Indangered Vascular Plants of California (Skinner anel Pavlik lQg4). CeFrs'" closed-cone conifer forest; ChprJ = chaparral: CoScr = coastal scrub; SmWlk "" cismontanc woodland; MshSw = marshes and swamps: Medws = meadows and seeps; RpWld '" riparian woodland: VFGrs c= valley and foothill grassland; VnPls '" Vernal pools Biological Assessment -North Bntiquitos Interceptor Sewer Improvcment~. 4-29-08 i ! ------------------- TABLE 1. SENSITIVE AND PROTECTED PLANT SPECIES POTENTIALLY PRESENT IN THE PROJECT AREA (continued) Latin Name Common Name Fed State HMP Habitat Occurrence Potential for Occurrence Status Status Status Dudleya vlscida Sticky dudleya FSC none Listed Chprl, CoScr Absent Low to moderate, distinctive plant with specific preferred conditions not found on-site Eryngium arlstulatum San Diego button celety FE SE Narrow VnPls Absent Low, no vernal pools observed on-site ssp. parishii Endemic ~phorbla misera Cliff spurge none none Listed CoScr Absent Low, preferred conditions absent Ferocactus virldescens San Diego barrel cactus FSC none Listed CoScr Absent Low -distinctive plant sought, not observed on-site Hazardia orcuttii Orcutt's hafZardia FSC none Narrow Chaprl Absent Low, outside of known range, plant Endemic sought, not observed on-site Iva hayesiana San Diego marsh-elder FSC none Listed RpWlk Absent Low, distinctive plant sought, not observed on-site Muilia clevelandii San Diego Goldenstar FSC none Narrow Absent Low to moderate, near edge of range, Endemic Chprl, CoScr plant sought, not observed on-site Myosurus mln/mus Little Mousetail FSC none Narrow VnPls Absent Low, no vernal pools observed on-site, ssp.apus Endemic Navarretia fossa lis Prostrate navarretia FT none Narrow VnPls Absent Low, no vernal pools observed on-site Endemic Orcuttia californ/ca California orcutt grass FE SE Narrow VnPls Absent Low, no vernal pools observed on-site Endemic preferred conditions not present Pinus torreyana Torrey pine FSC none Listed Chprl Absent Low, distinctive plant would have been easily observed if present -' Quercus dumosa Nuttal's scrub oak FSC none Listed Chprl Absent Low, known nearby, no oaks occur on-I site Quercus engelmanni Engelmann oak none none Lisated Chprl, CmWlk, Absent Low, known nearby, no oaks occur on-I RpWlk, VFGrs site -~--~----~~~ -~-~-----. -- Abhreviations: FE ~ Fedrally Endangered; FT = Federally Threatened; FSC "" Federal Species of Special Concern; ~E-California ESA Endangered; NE "" HMP Narrow Endemic U1'ted = conservation encouraged by HMP, but not recommended for the heightened protection afforded Narrow Endemic species. I'uhilal Codes: Per California Native Plant Society's Rare and Indangered Vascular Plants of California (Skinner and Pavlik 1994). CCFrs = closed-cone conifer forest; Chprl "" chaparral: CoSer = coastal scrub; SmWlk -= c/smontane woodland; MshSw = marshes and swamps; Medws = meadows nnd seeps; RpWld = riparian woodland; VFGrs 00" valley and foothill grassland; VoPls '" Vertutl pools Hiological Assessment -North Batiquitos Interceptor Sewer Improvements, 4-29-0R J I I I I I I I I I I I I I I I I I I I 6.1 impact sensitive habitat. Staging Area work may produce noise levels that have the potential to impacts to nesting birds. 4. Access Routes -All access routes are either: a) a paved surface, b) bare dirt on a private lot, c) a designated trail and/or easement road surfaced with decomposed granite or bare dirt, or d) an access road surfaced vvith decomposed granite and emerging freshwater marsh or southern coastal salt marsh No significant project related impacts have the potential to occur due to Access Routes except in the case of the access road where freshwater marsh or southern coastal salt marsh is emerging. Mitigating measures must be employed to ensure that no significant impacts occur to habitat or nesting birds due to vehicular access across the portion of road. Direct Impacts to Habitat Non-Sensitively Sited Manholes -Twenty-one (21) of the forty-three manholes sites occur in developed or disturbed habitats. The work occurring in the Immediate Work Zone, in Staging Areas, and along Access Routes to these manholes v.Tj]l not permanently or temporarily impact sensitive habitats or sensitive plants potentially occurring in zone of work. Sensitively Sited Manholes -Twenty-two (22) of the forty-three manholes occur in the immediate vicinity of or within habitats considered sensitive in Carlsbad. Each of these manholes has been scrutinized to identify a work plan that uses methods and procedures designed to reduce project impacts to a level of insignificance. Figures 2 though 6 include enlargements of these 22 sensitively sited manholes, and include descriptions of the particular work methods recommended to reduce project related impacts to a level of insignificance. Regarding work in the Immediate Work Zone, no significant impacts are anticipated to occur provided that the specific work methods identified in Figures 3 through 7 are utilized. In several instances, direct access to a manhole is impeded by existing habitat. However, the pruning necessary to provide adequate access is anticipated to damage only above grade, vegetative plant parts. No root damage is anticipated to occur. Complete re-growth of any pruned plant(s} is anticipated to occur during the growing season following work operations. Activities in the Immediate Work Zone are also likely to crush small quantities of habitat, particularly low-stature vegetation immediately adjoining certain manholes. However, this crushing of vegetation v.Tj]l be caused by people and light equipment, not heavy machinery or vehicles. Therefore, damage to vegetative parts due to crushing will be Biological Assessment -North Batiquitos Interceptor Sewer Improvements, 4-29-08 11 I I I I I I I I I I I I I I I I I I I minimal and insignificant. Complete re-growth due to crushing is also anticipated to occur during the grO\\ring season follov.ring work operations. Regarding work in the staging areas, all equipment locations, access to these locations, and work to be performed in these locations can be achieved such that no significant impacts to sensitive habitats shall occur. Machinery necessary to accomplish the work can be located at whatever distance from each manhole is necessary to ensure sensitive habitat protection. Hoses placed between the machinery and the manhole can be positioned around or over sensitive vegetation in such a way that impacts are not anticipated to occur. Preparation of each manhole liner material can be accomplished in a location that does not impact sensitive habitat. The liner material can then be hand carried to the installation site and lowered into the manhole such that no significant impacts to sensitive habitat will occur. Regarding vehicular access routes, the eastern end of the project supports several locations where sensitive habitat could be impacted by vehicular use unless protective measures are implemented. Vehicular access to manholes located on Mitsuuchi and State of California property shall be via a dirt/ decomposed granite roadway that has been used for east-west access along the Batiquitos Lagoon north shore for many decades. On the Mitsuuchi property just west of AH #56, freshwater marsh is emerging on the roadway, and protective measures are recommended to allow vehicles to pass. To protect this vegetation from significant impacts, minor pruning is recommended, and then the roadway surface to be tracked shall be temporarily covered V\rith railroad ties. This procedure will protect plant roots from permanent damage. In the central portion of the Mitsuuchi property, this roadway has been recolonized by emergent species for a distance of approximately 400 feet. This portion of the road is especially wet and densely recolonized. It is likely that any vehicular traffic across crossing this area at any time of the year will displace soils such that permanent impacts are likely to occur. Therefore, it is recommended that all vehicular traffic shall be excluded from this portion of the roadway, from approximately 100 feet west of AH #57, to approximately 30 feet west of AH #58. On the eastern end of the Mitsuuchi property, just west of AH #59, freshwater marsh and coastal salt marsh is emerging on the decomposed granite surface. Minor pruning and the use of railroad ties and/or plywood sheet is recommended to overlay the vegetation in this location, so roots are protected from tire damage. On state of California land, a narrow, dirt road connects the asphalt service road near Arenal Dr. to the primary east-west roadway. In three locations along this +north-south access, emerging coastal salt marsh vegetation has the potential to be damaged unless measures are implemented to avoid impacts. It is recommended that plywood sheet Biological Assessment -North Batiquitos Interceptor Sewer Improvements, 4-29-08 12 I I I I I I I I I I I I I I I I I I I and/or railroad ties are laid over the surface in these locations and that All Terrain Vehicles and light trailers are used exclusively along this narrow dirt road. Provided that the above stated protective measures are implemented, no significant impacts are expected to occur as a result of vehicular access along existing roadways and trails proposed for used by the project. 6.2 Direct Impacts to Wildlife A number of sensitive bird species, and possibly other sensitive animal species may utilize areas in the vicinity of the project. The work proposed does not involve activities that are likely to have the potential to directly take an individual of a protected animal species. The work proposed will not significantly impact sensitive habitats which might lead to direct impacts to sensitive species. In terms of animals that may be nesting below-grade, the proposed work does not involve below-grade exca\'ations that would disrupt nesting activity and potentially take an animal. However, there is a possibility that bird nesting could be occurring \\ithln the Immediate Work Zone of the project at the time when construction operations are scheduled. Under these circumstances, a chance exists that a direct impact could occur unless measures are proposed to ensure that impacts to nesting birds do not occur. 6.3 Indirect Impacts The biological monitor "\-vill be equipped with a noise meter to deterrrrine sound levels at varying distances from the noise source. If nesting birds are located in an area exposed to noise levels is excess of 60 dBA, (measured as a 60 minute time weighted average) then construction activities will be halted or noise attenuation barriers \\ill be erected to reduce noise levels to below 60 dBA at the biolOgical receptor. 7.0 Jurisdictional Responsibilities 7.1 U.S. Army Corps of Engineers Under Section 404 of the Clean Water Act (CWA), the U.S. Army Corps of Engineers (USACE) maintalns regulatory authority over jurisdictional wetlands, waters of the United States, and non-wetlands waters under certain conditions. Based on existing wetland vegetation resources, some areas in and near the project may be characterized as jurisdictional wetlands (a wetland delineation has not been performed to render a conclusive determination). As stated in section 6.1. no permanent impacts to wetlands or waters of the U.s. are expected to occur. The project will not affect the subsurface as equipment will be staged BiolOgical Assessment -North Batiquitos Interceptor Sewer Improvements, 4-29-08 13 I I I I I I I I I I I I I I I I I I I from an existing compacted dirt road. In addition, previous site visits indicate that wetland hydrology is not present at the manhole locations. 7.2 California Regional Water Quality Control Board Section 401 of the CW A also requires a water quality certification or waiver for projects which v.'ill result in impacts pursuant to Section 404. It is not anticipated that an application for such certification to the California Regional Water Quality Control Board (RWQCB) is required for this project as the project 'will not cause changes to water volume or flow. 7.3 California Department of Fish and Game The California Dept of Fish & Game (CDFG) allo'ws for impacts to streambeds only in conjunction with execution of a Streambed Alteration Agreement (SAA) pursuant to Section 1600 of the California Fish & Game Code. A SAA is not a discretionary permit, but rather an agreement developed between an applicant and CDFG 'which addresses the proposed limits of impacts, and includes mitigation measures. CDFG jurisdiction is usually calculated based upon the exi:ent of wetland or riparian vegetation. CDFG jurisdiction applies also to any body of ",,,ater that flows at least periodically or intermittently through a bed or channel ha ving banle. Under this criterion, CDFG jurisdiction applies to the CSM vegetation described in section 6.l. Hm\Tever the v,\Tork is not envisioned in any streambed or in any feature that runs between definable banks, thus no CDFG permit is required. 8.0 Proj ect Mitigation Under the requirements of the California Environmental Quality Act (CEQA), projects that create significant environmental impacts to biological resources at a project site must propose mitigation to offset the environmental damage attributable to the project. 8.1 HMP Conservation Setting Compliance The Oty of Carlsbad Habitat Management Plan (HMP) received final resource agency approval and was adopted by the City in November 2004. This HMP establishes the policy impact and mitigation standards with regard to the Federal and State Endangered Species Act (ESA) compliance. The I-Th1P permits the maintenance of existing public utilities within Hardline Conservation Areas. Several manholes occur in EJ..isting Hard1ine Conservation Areas. No portions of the project occur in Proposed Hardline Conservation Areas or Proposed Standards Areas. The project is located vdthin, or in the immediate vicinity of HMP Core Biological Assessment-North Batiquitos Interceptor Sewer Improvements, 4-29-D8 14 I I I I I I I I I I I I I I I I I I I Focus Planning Area #8. Though the project passes through Focus Planning Area #8 and a portion of the HMP Hardline Conservation Area, no significant impacts are proposed by the project and therefore the project is consistent with HMP requirements. The proposed project does not constitute a significant biological impact to lands protected by the H:MP and therefore mitigation is not required. 8.2 Mitigation Measures Portions of the project shall occur in sensitive habitat that is known to support sensitive arumal species. Significant, direct impacts are not anticipated to occur provided that the project is constructed using the methods and procedures described herein. To ensure that no direct impacts occur, the follm\'ing mitigation measures are recommended: 1. Bird Nesting Season prohibition. Implementation of the follo"\\'ing mitigation measures shall be required for project components that result in indirect impacts (e.g., construction-generated noise) to the coastal California gnatcatcher, the least Bell's vireo, and the Southwestern willow flycatcher. A. No clearing, grubbing, grading, or other construction activities shall occur betw'een March 1 and August 15, the breeding season of the above-referenced bird species, until the followmg requirements have been met to the satisfaction of the City: i. A qualified Biologist (possessing a valid Endangered Species Act Section 10(a)(I)(a) Recovery Permit) shall survey appropriate habitat areas subject to construction noise levels exceeding 60 dBA Leq for the presence of gnatcatcher. Gnatcatcher, Bell's vireo and Flycatcher surveys shall be conducted pursuant to USFWS protocol survey guidelines a minimum of 4 weeks (within the breeding season) prior to commencement of construction. If gnatcatchers, Bell's vireo or Flycatchers are present, then the follm\'ing conditions must be met: Between March 1 and August 15, no construction activities shall occur 'where such activities would result in noise levels exceeding 60 dBA Leq at the edge of occupied gnatcatcher habitat. An analysis concluding that construction-generated noise would not exceed 60 dBA Leq at the edge of occupied habitat must be completed by a qualified Acoustician (possessing current noise engineer license or registration, with experience monitoring noise levels for listed wildlife species) at least 2 weeks prior to commencement of construction activities; OR ii. At least 2 weeks prior to commencement of construction activities, and under the direction of a qualified Acoustician, noise attenuation measures (e.g., berms, "ralls) shall be implemented to ensure that construction generated noise will not exceed 60 dBA Leq at the edge of occupied gnatcatcher, Bell's vireo or Flycatcher habitat Concurrent with Biological Assessment-North Batiquitos Interceptor Sewer Improvements, 4-29-08 15 I I I I I I I I I I I I I I I I I I I commencement of construction activities and 1I\ith implementation of necessary noise attenuation measures, noise monitoring shall be conducted at the edge of occupied habitat to ensure that construction- generated noise does not exceed 60 dBA Leq. If the noise attenuation measures implemented are determined to be inadequate by the qualified Acoustician or Biologist, then the associated construction activities shall cease until such time that adequate noise attenuation is achieved or until the end of the breeding season (August 15). iii. If gnatcatchers, Bell's vireo or Flycatchers are not detected during the preconstruction survey vdthin areas that would be subject to construction noise levels exceeding 60 dBA Leq, the qualified Biologist shall submit substantial evidence to the City and applicable regulatory agencies demonstrating whether noise attenuation measures (e.g., berms, walls) are necessary between March 1 and August 15 as follows: a. If this evidence indicates the potential is high for gnatcatcher to be present based on historical records or site conditions, then the applicant shall adhere to mitigation measure 1a. above. b. If this evidence concludes that no impacts to this species are anticipated, no mitigation measures will. be necessary. 2. Biological Monitor Required. A Wildlife Agency-approved biological monitor shall be present to monitor and oversee all construction activities having the potential to significantly impact sensitive biological resources. The biolOgical monitor shall have the authority to stop construction and require additional precautions or conservation measures deemed necessary to protect the biological resources in the area. Implementation of this measure shall be verified by the City of Carlsbad Planning Department prior to and concurrent with construction. 3. Access Through Sensitive Vegetation. Only rubber-tired vehicles and/or balloon-tired all-terrain vehicles shall be used for construction and ongoing maintenance of the project. When vehicles are accessing manholes AH #54-#60 where sensitive vegetation may be encountered, a biological monitor shall be present to direct access per the following guidelines: A. Hoses shall be laid over existing vegetation as directed by monitor. B. Hoses must be extended to their maximum length prior to vehicular crossing of sensitive vegetation. C. Vehicles may only cross sensitive vegetation on a service road/trail, and only on the least impacting location along that road/trail. D. Pruning of sensitive vegetation along each tire track shall be no more than 24" wide. E. All sensitive vegetation to be crossed by vehicles shall be overlaid with deckin& either a plywood shield or railroad ties, in a manner that limits Biological Assessment-North Batiquitos Interceptor Sewer Improvements, 4-29-08 16 I I I I I I I I I I I I I I I I I I I crushing of vegetation. The monitor shall direct whether block or RR ties shall be used to elevate the decking from the ground surface to reduce the crushed footprint. \"lb.en workers are accessing manholes AH #22, #29-#36, #41, #45-#48, #54-#60 where sensitive vegetation may be encountered in the immediate work zone, a biological monitor shall be present to direct access per the following guidelines: F. Pruning of shrubs in sensitive vegetation that occurs in the Immediate Work Zone (within a five foot radius of the manhole), shall be directed by the biological monitor. G. Sensitive low-growing vegetation in the Immediate Work Zone shall be overlaid V\ith pl)TV\7ood sheeting that has been cut into a 5-foot radius over that portion of the work to be protected. The monitor shall direct if block must be used to elevate the plywood from the ground surface to reduce the crushed footprint. 4. Pre-Construction Contractor Education. The biologist shall prepare a Pre-Construction Education Plan. This plan shall provide information necessary to train all contractors and construction personnel on the biological resources associated with this project. At a minimum, training shall include: 1) the purpose for resource protection; 2) a description of sensitive habitats and protected plants and animals in the vicinity of the project; 3) the guidelines involving limiting activities, vehicles, equipment and construction materials, including identification of acceptable vehicle parking stations and remote work stations, during implementation of the project; 4) environmentally responsible construction practices; 5) protocols to be followed to resolve conflicts that may arise at any time during the construction process, and 6) the penalties associated with violations of the Endangered Species Act. 5. Post-Construction Report. A post-construction report shall be prepared and distributed to the City Planning Department to document compliance with the mitigation measures identifie d in this :MMRP. If the post-construction report concludes that any permanent impacts have occurred to sensitive vegetation in the area as a result of implementation of the project, a revegetation and monitoring plan (with a schedule for implementation), reviewed and accepted by the USFWS shall be prepared and implemented. Biological Assessment -North Batiquitos Interceptor Sewer Improvements, 4-29-08 17 I I I I I I I I I I I I I I I I I I I 9.0 References Beauchamp, R M. 1986. A Flora of San Diego County, California. Sweetwater Press, National City, California. Bowan, R H. 1973. Soil Survey, San Diego Area, California, Part 1. United States Department of Agriculture. 104 pp. appendices. City of Carlsbad, Habitat Management Plan for Natural Communities in the City of Carlsbad, Final Approval November, 2004. Hickman, J. C. 1993. The Jepson Manual, Higher Plants of California, University of California Press, Berkeley, California. 1400 pp. + 1 p. errata Holland, Robert F. 1986. "Preliminary Vegetative Plant Communities of California." Department of Fish and game, Natural Heritage Section. Munz, P. 1974. A Flora of Southern California. University of California Press, Berkeley, California. 1086 pp. Reed, Porter B. Jr., National List of Plant Species That Occur in Wetlands: California (Region 0), U.s. Fish and Wildlife Service, may 1988. Rebman, J. P. and Simpson, M. G., 2006. Checklist of the Vascular Plants of San Diego County, 4th Edition, San Diego Natural History Museum, San Diego, California. Reiser Craig H. 1994. Rare Plants of San Diego County, Aqua fir Press. Imperial Beach, CA. San Diego County Department of Planning and Land Use, Guidelines for the Implementation of the California Environmental Quality Act, Aug. 1991. Skinner, M. W. and Pavlik, B. M. 1994. California Native Plant Society's Inventory of Rare and Endangered Vascular Plants of California. Special Publication No.1 (Fifth Edition), California Native Plant Society, Sacramento, California. 338 pp. Sunset Publishing Corporation, Sunset Western Garden Book. 2001. Biological Assessment -North Batiquitos Interceptor Sewer Improvements, 4-29-08 18 I I I I I I I I I I I I I I I I I I I SOURCE: The Thomas Guide, San Diego County, 2005 Figure 1 Location Map Batiquitos Sewer Manhole Rehabilitation Carlsbad, California March 5, 2007 PS# 061029 NORTH o PLANNING i SYSTEIW _ 1250 2500 SCALE: 1" = 2500' SOOOFT • I I I I I I I I I I I I I I I I Appendix A Plants of North Batiquitos Interceptor Sewer Improvements Project I I I I I I I I I I I I I I I I I I I Appendix A Plants of North Batiquitos Interceptor Sewer Improvements Project ANGIOSPERMS (MONOCOTS) Juncaceae -Rush Family ! Iuncus acutus ~ lepopoldii Poaceae -Grass family * Avena barbata * Bromus diandrus * * * Bromus madritensis Distichlis spicata Cortaderia selloana Festuca §P:. Levmus condensatus Typhaceae -Cattail Family Tyhpa latifoIia ANGIOSPERMS (EUDICOTS) SouthV\Testern spiny rush Slender "Wild oat Ripgut grass Redbrome Saltgrass Selloa Pampus grass Turf Giant vdld rye Broad-leaved cattail Aizoaceae -Carpetweed, Fig-marigold or Iceplant family * Carpobrotus eduIis Hottentot fig Anacardiaceae -Sumac family Rhus integrifoIia Amaranthaceae -Amaranth Family * Dysophania ambrosioides Apocynaceae -Dogbane Family * Nerium oleander Amaryllidaceae -Amaryllis Family * Agapanthus §P.:. Anacardiaceae -Sumac family * Schinus molle Lemonadeberry Mexican tea Oleander Lily-of the-Nile California pepper BiolOgical Assessment -North Batiquito5 Interceptor Sewer Improvements, April 29, 2008 I I I I I I I I I I I I I I I I I I I Apiaceae -Carrot family * Foenculum vulgare Areacaceae -Palm family * Phoenix canariensis Asteraceae -Sunflower family Ambrosia psilostachya Aute~iacalifornica Baccharis pilularis Baccharis salicifolia * * Centaurea solstitia1is Conyza canadensis Encelia californica Isocoma menziesii var. vernonioides Iaumea camosa Picrus echioides Pluchea odorata Xanthium strumarium Brassicaceae -Mustard family * Iacaranda mimosifolia Brassicaceae -Mustard family * Brassica nigra * Hirschfeldia incana Cactaceae -Cactus Family Opuntia littoralis Chenipodiaceae -Goosefoot family * Atriplex semibaccata Salicornia pacifica Salsola tragus * Convolvulaceae -Morning-Glory Family Cressa truxillensis Crassulaceae-Stonecrop Family Dudleya pulverulenta Euphorbiaceae -Spurge Family * Ricinus communis Sweet fennel Canary Island palm Western ragweed Coast sagebrush Coyote brush Mule fat Yellow star-thistle Horseweed California encelia Coast Goldenbush Salty Susan Bristly ox-tongue Salt marsh fleabane Cocklebur Jacaranda Black mustard Perennial mustard Prickly-pear Australian saltbush Pacific pickleweed Russian !!thistlelf Alkali weed Chalk Live-forever Castor bean BIOlOgIcal Assessment -North Batlquitos Interceptor Sewer Improvements, April 29, 2008 I I I I I I I I I I I I I I I I I I I Fabaceae -Pea Family * Acacia§R. * Lotus scoparius Melilotus albus Frankeniaceae -Frankenia Family Frankenia salina Heliotropium -Heliotrope Family Heliotropum curassavicum Lamiaceae -Mint Family Salvia mellifera Malvaceae -Mallow family Malvella leprosa Moraceae -Fig Family * Ficus sp. Myrtaceae -Myrtle Family * Euclayptus sp. Myoporaceae -Myoporum Family * Myoporumlaetum Pinaceae -Pine Family * Pinus.§p.:, Polygonaceae -Buckwheat family Eriogonum fascicu1atum Rosaceae -Rose family Heteromeles arbutifolia SaIicaceae -Willow family Salix lasiolepis Sapindaceae -Soapberry Family * Cupaniopsis anacardioides Solanaceae -Nightshade family * Datura wrightii * Nicotiana glauca Acacia Deerweed White sweetclover Alkali heath Alkali heliotrope Black sage Alkali-mallow Fig Eucalyptus Myoporum Pine Flat-top buckwheat Toyon Arroyo willow Carrotwood Western jimson weed Tree tobacco BIological Assessment -North Batiquitos Interceptor Sewer Improvements, April 29, 2008 I I I I I I I I I I I I I I I I I I I Tamaricaceae -Tamarisk Family * Tamarix parvifolia STATUS ! Oassified Sensitive * Non-native (weed or cult.) Plant Communities Coastal and Valley Freshwater Marsh Coastal sage scrub Developed Lands Disturbed Lands Exotic Lands Non-native grassland Southern coastal salt marsh Southern willow Scrub Tamarisk Biological Assessment -North Banquitos Interceptor Sewer Improvements, April 29, 2008 o 75 leo IT EB~ NORTH SCALE: -1" = 150' NO VEHICULAR ACCESS EAST OF THIS POINT NO VEHICULAR ACCESS WEST OF THIS POINT MANHOLES AH #58 --------- AH #57 DETAIL 1" 40' MITSUUCHI PROPERTY AH #60 (SEE DETAIL THIS SHEET) ONLY FOOT TRAFFIC ALONG THIS TRAIL AH -PREPARE LINER AH #58 DETAIL \ -\ \ -- 1" = 40' AH #59 VEGET ATION ASSOCIATIONS tess I COASTAL SAGE SCRUB I DEV I DEVELOPED LANDS [QjD DISTURBED LANDS EXOTIC LANDS I NNG I NON-NATIVE GRASSLAND 4RtN4 ~-FRESHWATER MARSH L RD. l1li RIPARIAN SCRUB CALIFORNIA '" W CC :11 SO. COASTAL SALT MARSH WORK PROCEDURE o SUGGESTED PARKING AND STAGING ® PRUNE VEGETATION AS NECESSARY © @ ® ® @) USE l80d PLYWOOD SHIELD IN LEAST IMPACTING LOCATION USE UP TO 360d PLYWOOD SHIELD AS NECESSARY PROTECT LOW VEG. WIT ARP CONFINE WORK ZONE TO TRAIL SURFACE REPAIR ROPE FENCE TO ORIGINAL CONDITION (AT TRAIL EDGE) ® PROTECT SIGN FROM DAMAGE CD PRUNE VEGETATION AS NECESSARY, THEN OVERLAY wi RR TIES AS NECESSARY TO PROTECT ROOTS FROM TIRE DAMAGE. REMOVE TIES WHEN FINISHED o BIOLOGIST SHALL DIRECT FOOT PATH OF TRAVEL AND PLYWOOD SHIELD PLACEMENT IF NECESSARY '- ---.- 1" = 40' AH #60 DETAIL 1" 40' II .... C Q) E en en Q) en en « CCS U C> 0 0 (() a C .... o :: '0 u "tJ a .0 ., 't: a u -0 a> ~ ..... 0 i !r . .., 0 L-a.. L-a> ~ a> (/) L- 0 -a.. a> 0 L-a> -c en 0 -.-::J CT :;: 0 ID .r:. t: 0 Z DATE: 2-15-08 CITY NO. CP 3538 FIGURE: 6 I ~I --------------------------------------------~ I I I I I I I I I I I I I I I I I I VEGETATION ASSOCIATIONS COASTAL SAGE SCRUB DEVELOPED LANDS DISTURBED LANDS EXOTIC LANDS I NNG I NON-NATIVE GRASSLAND _ FRESHWATER MARSH RIPARIAN SCRUB SO. COASTAL SALT MARSH o 75 1&0 FT EB~ MANHOLE S AH AH NORTH SCALE: -1" = 150' MURPHY PROPE\~TY \ \ ~ 20 FT. SEWER SYW.) \"11. ~ d{EASE .. ENT (TYP." \ : C---( fr------AH .\,.~~ \EASUA£S , ' AH # l6",~ SHEET) ~ ---------------~~Y) (SEE D£r ~~ spt~)O"E~ _____ ~~ _ NECESSARY ----- AH #53A (NO SPECIAL .. EASURES NECESSARY) ~~~/\ AH #52 /' /' /''-- / AH #47 DETAIL L --./ ~ '\ 1" 40' AH #48 DETAIL (NO SPECIAL .. EASURES NECESSARY) I . \ II a /' , - /' AH #54 AH 1" 40' AH #54, #55, & #56 DETAILS 1" 80' \\ \ MITSUUCHI PROPERTY WORK PROCEDURE o SUGGESTED PARKING AND STAGING ® PRUNE VEGETATION AS NECESSARY © @ ® ® @) ® CD USE 180d PLYWOOD SHIELD IN LEAST IMPACTING LOCATION USE UP TO 360d PLYWOOD SHIELD AS NECESSARY PROTECT LOW VEG. W / T ARP CONFINE WORK ZONE TO TRAIL SURFACE REPAIR ROPE FENCE TO ORIGINAL CONDITION (AT TRAIL EDGE) PROTECT SIGN FROM DAMAGE PRUNE VEGETATION AS NECESSARY, THEN OVERLAY W / RR TIES AS NECESSARY TO PROTECT ROOTS FROM TIRE DAMAGE. REMOVE TIES WHEN FINISHED I I ~~ I! ,l 2 II I. IE § " :; I +-"' C Q) E en en Q) en en « rn u 0> 0 0 ea c::i z ~ c 'c ... o :!; c (.J "C C .ll III -.::: c (.J -0 a> .~ 0 L-a.. L-a> ~ a> en L- 0 -Q. a> 0 L-a> -c en 0 :!:: :J 0" + c CO ...c -L- 0 z ~ DATE: 2-15-08 CITY NO. C P 3538 FIGURE: 5 VEGETATION ASSOCIATIONS MANHOLES AH #40 ~ COASTAL SAGE SCRUB I DEV I DEVELOPED LANDS [Q!U DISTURBED LANDS _ EXOTIC LANDS I NON-NATIVE GRASSLAND " ~--........... ~ ~~-: ..... ~--....... ... ---..... ~/\ _ FRESHWATER MARSH _ RIPARIAN SCRUB ICSM I SO. COASTAL SALT MARSH BATIQUITOS DRIVE AH #43 (NO SPECiAl NEASURES NECESSARY) \ POND AH #44 (NO SPECIAL t.lEASURES NECESSARY) AH AH #36 DETAIL 1-= 40' AH #41 DETAIL I" = 40' AH #45 DETAIL #49 1-= 40' AH #46 DET AI L I" 40' r-' o 7!! 1110 FT EB~ NORTH SCALE: -1-= 150' WORK PROCEDURE ~ © @ ® ® SUGGESTED PARKING AND STAGING PRUNE VEGETATION AS NECESSARY USE 180d PLYWOOD SHIELD IN LEAST IMPACTING LOCATION USE UP TO 360d PLYWOOD SHIELD AS NECESSARY PROTECT LOW VEG. W / T ARP CONFINE WORK ZONE TO TRAIL SURFACE @) REPAIR ROPE FENCE TO ORIGINAL CONDITION (AT TRAIL EDGE) I I ~ C) ~ ~ o C ... o == o (J "t:I o .ll III L: o (J -(,) Q) '0' L. a.. L. Q) ~ Q) (/) +-' L. C 0 (1) -E g- en e en .! (1) c en en (I) « 2 ::J CO .~ U --c OlCD o oJ: o 1: -0 CO z !)ATE: 2-15-08 an MO. CP 3538 F1GURE: 4 I ~i --------------------------------------------~ I I I I I I I I I I I I I I I I I I VEGETATION ASSOCIATIONS r-r--.... COASTAL SAGE SCRUB I DEV I DEVELOPED LANDS [QJL] DISTURBED LANDS EXOTIC LANDS \\ I NNG I l '.' NON-NATIVE GRASSLAND }, . ! FRESHWATER MARSH RIPARIAN SCRUB .. I ~ SO. COASTAL SALT MARSH ~ ~ ...... ,,-'. . BATIQUITOS LAGOON AH #32 DETAIL 1" = 40' AH #33 ') ~ ~ ~ \_J// ~ ~ l I \ -l l BATIQUITOS DRIVE " l! . '--,~: ~~~---+-'-/ GOLF COURSE o 75 1110 FT ffi~ MANHOLES NORTH SCALE: - 1 n = 150' --- 1" = 40' AH #34 DETAIL 1" = 40' AH #35 DETAIL 1" 40' \ \ --Y ~ ./'l ~ -- #30 AH #39 WORK PROCEDURE o SUGGESTED PARKING AND STAGING ® PRUNE VEGETATION AS NECESSARY @ USE 180d PLYWOOD SHIELD IN LEAST IMPACTING LOCATION @ USE UP TO 360d PLYWOOD SHIELD AS NECESSARY ® PROTECT LOW VEG. W / TARP ® CONFINE WORK ZONE TO TRAIL SURFACE @) REPAIR ROPE FENCE TO ORIGINAL CONDITION (AT TRAIL EDGE) I LI I Eli' IJ is I I' ,,' II +-" C Q) E en en Q) en Ii -_ N Oi ~ !I ~ ~ i ~ c 'c ... o ~ '0 (.) "C C .Q 1/1 L: C (.) -0 a> '-0 L-a.. L-a> ~ a> (/) L- 0 -a.. a> 0 L-a> -c en I (I) « ~ ::l rn .2" U --0 e>al o L: o t .-0 (l) z DATE: 2-15-01 CITY NO. CP 3538 FIGURE: 3 MANHOLES AH #21 -AH #29 BATIQUITOS LAGOON ~ ", AH #22 DETAIL SEWAGE " 1" = 40' AH #24 DETAIL 1" 40' AH #29 DETAIL WORK PROCEDURE o SUGGESTED PARKING AND STAGING ® PRUNE VEGETATION AS NECESSARY © @ ® ® USE 180d PLYWOOD SHIELD IN LEAST IMPACTING LOCATION USE UP TO 360d PLYWOOD SHIELD AS NECESSARY PROTECT LOW VEG. W / T ARP CONFINE WORK ZONE TO TRAIL SURFACE @ REPAIR ROPE FENCE TO ORIGINAL CONDITION (AT TRAIL EDGE) \ ~ ~ \.. -" ....... ~-. 1" 40' AH #30 DETAIL 1" 40' VEGETATION ASSOCIATIONS less .1 COASTAL SAGE SCRUB I DEV I DEVELOPED LANDS rnIU DISTURBED LANDS _ EXOTIC LANDS I NNG I NON-NATIVE GRASSLAND _ FRESHWATER MARSH _ RIPARIAN SCRUB l es~ I SO. COASTAL SALT MARSH o 75 1eo FT m~ NORTH SCALE: -1" = 150' / AH #31 ...... "..---~------... ...-----... ---- -~ DETAIL 1" 40' I I ~t e !; r I ' .. ' Il ~ .. ::; I . ~ !i! Ie c 'c ~ o :: "0 u -0 c .Q fII ;: C U -(.) Q) '-o "-a.. "-Q) ~ Q) (/) ...... "-c 0 CD a. E ~ en "-en ~ CD c:: en en (I) <2:: ~ -:J CO .~ () --0 e>al o .s::. o t -0 CCz OATE: 2-15-08 CITY NO. CP 3538 FIGURE: 2