HomeMy WebLinkAbout3537; North Agua Hedionda Interceptor West Segment; North Agua Hedionda Interceptor West Segment; 2007-07-01FINAL
MITIGATED NEGATIVE DECLARATION
for the
NORTH AGUA HEDIONDA INTERCEPTOR
WESTERN SEGMENT REALIGNMENT PROJECT
Prepared for:
CITY OF CARLSBAD
1635 Faraciay Avenue
Carlsbad, CA 92008
Prepared by:
DUDEK
605 Third Street
Encinitas, California 92024
July 2007
TABLE OF CONTENTS
Page No:
Section 1 Introduction • • •
1.1 Project, Background : ^'^
1.2 Califomia Environmental Quality Act (CEQA) Compliance... 1-2
1.3 Decisions To Be Made And Pennits Required..... 1-3
1.4 Content And Format Of Mitigated Negative Declaration... ,...1-3
1.5 Public Review Process • ^'^
Section 2 Project Description 2-1
2.1 Project Location •••• ^'^
2.2 Project Components • 2-1
2.3 Special Construction Methods.. • 2-1
2.4 Project Operations 2-6
Section 3 Initial Study • 3-1
I. Aesthetics - "Would The Project: 3-15
II. Agriculture Resources - Would The Project: 3-16
III. Air Quality - Would The Project: 3-16
rv. Biological Resources - Would The Project: 3-19
V. Cultural Resources - Would The Project: 3-28
VI. Geology And Soils - Would The Project: 3-35
VII. Hazards And Hazardous Materials - Would The Project: 3-38
Vill. Hydrology And Water Quality-Would The Project:.., 3-40
IX. Land Use And Planning • • 3-44
X. Mineral Resources • 3-44
XI. Noise •- •• • 3-44
XII. Population And Housing • 3-46.
Xm. Public Services 3-47
xrv. Recreation • •• 3-48
XV; Transportation And Traffic... • -3-48
XVI. Utilities And Service Systems • 3-50
XVII. Mandatory Findings Of Significance 3-51
XVIII. Eariier Analysis Used And Supporting Information Sources 3-52
Attachments
Attachment A Biological Resources Letter Report
July 2007 4775-09.
NAHI Western Segment Realignment Project MND ToC-l
Table of Contents
LIST OF FIGURES
2 2
Figure 2-1 Regional Map •. • ' 2 3 Figure 2-2 Vicinity Map..;. • •••• ^ -> ^ 2-4 Figure 2-3 Project Components ; ^ ^
Figure 3-1 Biological Resources & Jurisdictional Delineation Map 3-21
Figure 3-2 Biological Resources & Jurisdictional Delineation Map ; • • 3-22
Figure 3-3 Biological Resources & Jurisdictional Delineation Map,....;........; 3-23 :
Figure 3-4 Biological Resources & Jurisdictional Delineation Map • • 3-24
Figure 3-5 Biological Resources & Jurisdictional Delineation Map 3-25
LIST OF TABLES
Table 3-1 . Impacts To Vegetation Communities & Land Cover Types 3-20
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NAHI Western Segment Realignment Project MND ToC 2
Sect/on 1.0
Introduaion
SECTION 1.0
INTRODUCTION
1.1 PROJECT BACKGROUND
The North Agua Hedioncia Interceptor (NAHI) is a 24-inch diameter, vitrified clay, gravity flow
sewer pipeline constructed by the City of Carlsbad in 1965. The NAHI, located within the City
of Carlsbad, runs west from the intersection of El Camino Real and Cannon Road, across Agua
Hedionda Creek, along the north shore of Agua Hedionda Lagoon to an existing pump station
(Foxes Landing Lift Station) immediately east of Interstate 5 (1-5). The City owns and is
responsible for the operation and maintenance ofthe NAHI. Operation and maintenance ofthe
NAHI is addressed in the City's Sewer Master Plan.
The Sewer Master Plan Update, which evaluated the wastewater collection needs for the
planning periods between 2002 and buildout for the City's service area as anticipated by the City
of Carlsbad General Plan, identifies deficiencies in the existing system and recommends
improvements to be implemented as part ofthe City's Capital Improvement Program (CIP). The
evaluation ofthe existing wastewater conveyance facilities determined that the westem segment
of the NAHI, that portion between Cove Dr and 1-5, required maintenance and other remedial
actions.
Deficiencies in the westem segment include lack of accessibility which prevents general
maintenance, inspection and emergency response to potential blockage or breach in that segment.
The original access road has been undermined by, shoreline erosion and no longer exist.
Additionally wave, water and wind-driven erosion has exposed access holes along this alignment
and threatens to undermine the access holes and pipeline. Intemally the acidic wastewater
environment has corroded the concrete access holes which are now in need of rehabilitation or
replacement.
In October 2004, the City of Carlsbad certified a Final Environmental Impact Report (EIR) and
approved the NAHr Westem Segment Sewer Maintenance Access Road and Shoreline
Protection Project. The primary purpose of this project was to restore the access road, provide
shoreline stabilization to avert ftirther undermining and erosion, and to allow ftjture routine
sewer maintenance, cleaning, rehabilitation and emergency repairs of the westem segment ofthe
NAHI.
July'2007 •
NAHr Western Segment Realignment Project MND
4775-09
I-l
Sect/on 1.0
/ntroduction
The NAHI Westem Segment Sewer Maintenance, Access Road and Shoreline Protection Project,
approved by the City of Carlsbad, consisted of the following six components: (1) re-
establishment of the sewer maintenance access road; (2) constmction of a shoreline protection
wall; (3) sewer pipeline improvements; (4) rehabilitation of existing manholes; (5) ftiture
maititenance and operation activities for the sewer pipeline facilities; and (6) development of a
portion of the regional trail system.
In September 2005, the City submitted a Coastal Development Permit (CDP) application to the
Califomia Coastal Commission (Commission) for the project. As part of the Commission permit
application process, concems were raised regarding constmction of the shoreline protection wall
as well as impacts to environmentally sensitive habitat areas (ESHA) and wetlands. The
Commission recommended that the City relocate the westem segment of the NAHI to a more
suitable and less sensitive alignment rather than pursue a program to maintain, fortify and
perpetuate the westem segment ofthe NAHI in its present sensitive location (Califomia Coastal
Commission Staff Report, April 26, 2006).
To address the Commission's concems, the City has re-designed the project to relocate the
existing NAHI ftirther inland by utilizing micro-tunneling technology. The re-designed project,
hereby referred to as the "NAHI Westem Segment Realignment Project," has a different
configuration when compared to the project design described in the Final EIR (NAHI FEIR,
October 2004) and approved by the City. The currently proposed NAHI Westem Segment
Realignment Project would eliminate the need to re-establish the sewer maintenance access road
and associated trail, and constmct the shoreline protection wall, and would therefore avoid
impacts to wetlands and impacts to ESHA.
1.2 CALIFORNIA ENVIRONMENTAL QUALITY ACT (CEQA) COMPLIANCE
The City of Carlsbad is the lead agency for providing environmental documentation in
accordance with CEQA for the NAHI Westem Segment Realignment Project. Pursuant to
Section 15177(b) ofthe CEQA Guidelines, the City has prepared this Environmental Impact
Assessment Form - Initial Study to analyze whether the Proposed Project would result in a
significant effect , on the environment. As revealed in Section 4. Environmental Impact
Assessment - Initial Study, the project would not have a significant adverse effect on the
environment. Measures have been incorporated into the proposed project to ensure that any
impacts would be less than significant.
Based on the findings of the Environmental Impact Assessment. Form - Initial Sftidy, the City
has made the determination that a Mitigated Negative Declaration (MND) is the appropriate
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,;NAHI Western Segment Realignment Project MND' . • • . , • .
Sect/on i.O
Introduaion
environmental document to be prepared in compliance with CEQA. As.provided for by CEQA
§21064.5, and Secfion 15070 of the State CEQA Guidelines, an MND may be prepared for a
project subject to CEQA wheri;an Inifial Study has identified potentially significant effects on the
environment but revisions in the project have been made such that cleariy no significant effect on
the environment would occur. This MND has been prepared in conformance with § 15071 ofthe
State CEQA Guidelines,
1.3 DECISIONS TO BE MADE AND PERMITS REQUIRED
Other permits by responsible agencies with jurisdicfion over the Proposed Project include the
following:
• California Coastal Commission: Coastal Development Permit
1.4 CONTENT AND FORMAT OF MITIGATED NEGATIVE DECLARATION
This MND includes the following:
Section 1.0, Introduction: Provides an Introducfion to the MND.
Section 2.0, Project Description: Provides a descripfion of the Proposed Project evaluated in
this MND; V • . V • • . .
Section 3.0, Environmental Impact Assessment Form - Initial Study: Provides an analysis
of environmental issues and concems surrounding the project and list of mifigafion measures.
Attachments to the MND:
Attachment A Biological Resources Letter Report
1.5 PUBLIC REVIEW PROCESS
In reviewing the MND and Environmental Impact Assessment Form - Initial Study, affected
public agencies and the interested public should focus on the sufficiency of the document in
idenfifying and analyzing the possible impacts on the environment and ways in which the
significant effects of the project are proposed to be avoided or mifigated.
, Comments may be made on the MND in writing before the end.of the comment period. A 30-
, day review and comment period from June 14. 2007 to July 15,2007 has been established, in
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july2Ci07.. '•••;••-<• s'-• '.••'•"• '•.•':• - . r •-''";.tr ' •
NAHI Western jegrnentRealignment^Project MND; ^ ^ ' ^':':.''u:y '
Section i.O
Introduaion
accordance with §15105(b) of the CEQA guidelines: Following the close of the public comment
period, the City of Carisbad will consider this MND and comments thereto in determining
whether to approve the Proposed Project. Written comments on the MND should be sent to the
following address by Julv 15, 2007.
City of Carlsbad
Planning Department
1635 Faraday Avenue
Carlsbad, CA 92008
Attention; Pam Drew, Planner
.July 2007 4775-09
NAHI Western, Segment Realignment Project MND .
SECTION 2.0
PROJECT DESCRIPTION
2.1 PROJECT LOCATION
The NAHI Westem Segment Realignment Project is located along the north shore of the Agua
Hedionda Lagoon in the City of Carisbad (Figures 2-1, Regional Map, and 2-2, Vicinity Map).
The westem segment ofthe NAHI, as defined for this project, includes the existing portion ofthe
NAHI extending from new access hole (AH 1), located approximately 400 feet east of the
exisfing Foxes Lift Stafion to the new AH 5 which is approximately 800 feet west of Cove Drive
(see Figure 2-3). As illustrated in Figure 2-3, the Proposed Project would relocate the exisfing
alignment of gravity pipeline along the shoreline fiirther inland by ufilizing 1,821 linear feet of
micro-tunneling techniques. In addifion, approximately 436 linear feet of pipeline will be
replaced by way of convenfional open trench constmcfion and rehabilitation of four existing
access holes will also be preformed. Figure 2-3 also illustrates proposed constmction methods
and project components, including proposed access holes.
2.2 PROJECT COMPONENTS
• As shown in Figure 2-3, the project involves realigning the existing westem segment of
the NAHI with a new gravity pipeline. The intenfion of the proposed new pipeline is to
maintain the same 24-inch interior diameter and flow capacity as the existing pipeline.
The carrier pipeline would be constmcted of thick wall High Density Polyethylene
(HDPE) with heat fiised (welded) joints, or bell and spigot PVC, dependent on
constmction methods selected by the Contractor. Total pipeline length between AH no. 1
and 4 would be approximately 1,963 linear feet.
• At the east end of the project, approximately 208 linear feet of existing 24-inch pipe will
be relocated through a newly constmcted parking lot to provide better maintenance
access. As shown m Figure 2-3, the Project would also reconnect an existing lateral back
to new AH 4 and provide a connecfion for a new lateral.
• As shown in Figure 2-4, an existing access hole under an exisfing volleyball court will be
replaced by a curved section of HDPE pipe (approximately 86 linear feet), installed by
convenfional methods.
• Four exisfing access holes will be rehabilitated using an intemal lining system.
2.3 SPECIAL CONSTRUCTION METHODS
The Proposed gravity pipeline will be, installed using both convenfional trenching methods and
micro-tunneling constmcfion methods. The portion of the pipeline to be installed using
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NAIHI Western Segment Realignment Project MND . - •, .
Orange
County
San Diego
Q 1 Miles
MAHI Western Segment Realignment - MND
; Regional Map
FIGURE
2-1
NAHI Western Segment Realignment - MND
Vicinity Map
FIGURE
2-2
Legend
O Proposed Access Holes
• Proposed Access Hole Rehabilitation
Relocated NAHI using Conventional Open Trench
~ Relocated NAHI using Microtunneling
Proposed Sewer Lateral
(Reconnect existing lateral and provide new
lateral stub connection using conventional
open trench construction)
Microtunneling Pit Area
Staging Area
YX//^ Proposed Non-improved Sewer Access Road
Existing Sewer System
Existing Sewer Easement
Existing Property Lines
AERIAL SOURCE: AIRPHOTO USA, JAN 2006 0 100 200
=3 Feet
NAHI Western Segment Realignment - MND
Project Components
FIGURE
2-3
Sect/on 2.0
Projea Description
convenfional trenching methods, approximately 436 feet, will be located within exisfing
disturbed and developed areas as shown in Figw'e 2-3. The reconnection of an existing lateral
would also be installed using conventional trenching methods within the constmcfion easement
(see Figure 2-3). As illustrated in Figure 2-3, the portion of the pipeline to be constmcted using
micro-tunneling techniques would extend approximately 1,821 feet and would be accomplished
in two segments using two bores from AH 2 to AH 3 and from AH 3 to AH 4.
The Micro-tunneling pipeline installation method involves drilling and pulling a 36- to 42-inch
steel casing through the earth. One access hole will be installed along the micro-tunneling
alignment, at.approximately the mid-point. As shown in Figure 2-3, the installation pits will be
located within previously disturbed areas. The installation pits will require an approximate 100-
foot long by 40-foot wide work area for equipment staging and to set up and facilitate the micro-
tunneling operafion. Material collection pits approximately ten feet long by ten feet wide by five
feet deep would be dug at both the entry and exit hole locations to capture drilling cuttings.
These drilling cutfings would be removed and disposed of at an approved disposal site. As
illustrated in Figure 2-3, three staging areas for equipment, vehicles, and materials would also be
required and have been proposed in previously disturbed areas. Upon completion of activities,
the work sites and staging areas would be restored to their original condition.
Field constmction of the project is estimated to last approximately four months in the period
between September 2007 and December 2007. The first phase of constmction would involve
preparing the staging areas, followed by laying down two guide wires across the realigned
surface for the micro-tunneling effort. Placement of the guide wires would occur on foot in
order to avoid disturbance to sensitive habitat areas. Micro-tunneling and placement of the new
pipeline is estimated to take approximately three weeks for each of the two stretches and would
generate approximately 200 cubic yards of cutting materials. For the portion of the pipeline to
be constmcted using open trench methods, all constmction activity would occur within a
previously disturbed or improved area. A new easement will be established for most of the open
trench work. The connecfion points will both be within existing city property or easement.
A total of eight to ten workers would be employed at any given time during constmction. The
use of a micro-tunneling drill rig, delivery tmcks, dump tmcks, a crane loader, backhoe, an
engine-driven hydraulics pump, an engine-driven generator, soil classifier equipment, and
forklift would be necessary for project constmcfion. A total of 30 tmck trips are anticipated to
occur throughout the four-month constmction period to deliver heavy equipment, and to remove
spoils, debris and material. Access to and from the constmction site would occur from Harrison
and Hoover Streets on the west and Cove Drive on the east.
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NAHI Western Segment Realignment Project MND . •- • . 2-5
Sect/on 2.0
Projea Description
All constmcfion would occur Monday through Friday, 7:30 AM to 5:30 PM in accordance with
the City of Carisbad Municipal Code Chapter 8.48 Noise. Once constmction has been complete,
the existing westem segment of the NAHI will be abandoned in place.
2.4 PROJECT OPERATIONS
Once constmcted and installed, the new sewer facilifies would operate 24 hours per day and
would be maintained, by the City of Carisbad., The City staff, would monitor the facility on a
regular basis as part of regular maintenance.
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NAHI Western Segment.Realignment Project MND, - 2-6
SECTION 3.0
ENVIRONMENTAL IMPACT ASSESSMENT FORM
INITIALSTUDY
Case No.: EIA 07-01
Date: May 10. 2007
1. Case Name: North Agua Hedionda Interceptor Westem Segment Realignment Project
2. Lead agency name arid address:
Citv of Carisbad •
1635 Faradav Avenue ; •
Carisbad. CA 92008 ,
3. Contact person and phone number: Pam Drew (760) 602-4644
4. Project location: City of Carisbad. northem shoreline of Agua Hedionda Lagoon,
between Hoover Street and Cove Drive
5. Project sponsor's name and address:
Citv of Carisbad ,
1635 Faradav Avenue [
Carisbad. CA 92008 ^ - • • '
6. General Plan designation: Residential, travel/recreation commercial, open space
and species resource area .
7. Zoning: Low to medium densitv residential, high densitv residential, travel/recreation
commercial, open space
8. Other public agencies whose approval is reguired: (e.g., permits, financing
approval, or participation agreement.)
Califomia Coastal Commission: Coastal Development Permit
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NAHI Western Segment Realignment- Project MND , , - ' ' • 3-1
Section 3.0
Environmental Impaa Assessment Form - Initial Study
9. Project Description/Environmental Setting, and Surrounding Land Uses:
(Describe the whole action involved, including, but not limited to later phases of the
project, and any secondary, support, or offsite features necessary for its implementation.
Attach additional sheets if necessary.)
Project Description: The Proposed Project would relocate the existing North Agua
Hedionda Interceptor (NAHI) westem segment located along the shoreline of the North
Agua Hedionda Lagoon in the Citv of Carisbad, Countv of San Diego, to fiirther inland
by utilizing 1,821 linear feet of micro-tunneling techniques and approximately 436 linear
feet of conventional open trench constmction with eleven new access holes and
rehabilitation for four existing access holes (see Figure 2-1, Regional Map. Fisure 2-2,
Vicinity Map, and Fisure 2-3, Project Components). Constmction of the proiect would
take approximately four months beginning in September 2007. A total of eight to ten
workers would be employed at any one time during constmction. A total of 30 tmck trips
are anticipated to occur throughout the four-month constmction period. Surrounding land
uses include undeveloped open space, residential properties and recreational commercial
properties. See ^ec/Zow 2.0 for ftirther project description detail.
ENVIRONMENTAL FACTORS POTENTIALLY AFFECTED:
The summary of environmental factors checked below would be potentially affected by this
project, involving at least one impact that is "Potentially Significant Impact," or "Potentially
Significant Impact Unless Mifigation Incorporated" as indicated by the checklist on the
following pages:
• Aesthetics Geology/Soils O Noise
• Agricultural Resources • Hazards/Hazardous Materials O Population/Housing
• Air Quality
Cultural Resources
Hydrology/ Water Quality
Biological Resources Q Land Use and Planning
I I Mineral Resources
r~| Public Services
r~] Recreation
I I Transportation/Circulation
Mandatory Findings of
Significance
I I Utilities & Service Systems
July 2007 4775-09
NAHI Western Segment Realignment Project MND 3-2
Sect/on 3.0
Environmental Impact Assessment Form - Initial Study
DETERMINATION: (To be completed by the Lead Agency)
I I I find that the Proposed Project COULD NOT have a, significant effect on the
environment, and a NEGATIVE DECLARATION will be prepared.
^ I, find that - although the Proposed Project could have a significant effect on the
environment, there will not be a significant effect in this case because the mitigafion
, measures described on an attached sheet have been added to the project. A MITIGATED
.• NEGATIVE DECLARATION will-be prepared..^^^-- ' -
r~l I find that the Proposed Project MAY have a significant effect on the enviromnent, and
an ENVIRONMENTAL IMPACT REPORT is required.
i I I find that the Proposed Project MAY have a "potenfially significant impact(s)" on the
environment, but at least one potentially significant impact 1) has been adequately
analyzed in an earlier document pursuant to applicable legal standards, and 2) has been
addressed by mitigation measures based on the eariier analysis as described on attached
sheets. A Negative Declaration is required, but it must analyze only the effects that
remain to be addressed.
I I I find that although the Proposed Project could have a significant effect on the
environment, there WILL NOT be a significant effect in this case because all potenfially
significant effects (a) have been analyzed adequately in an earlier ENVIORNMENTAL
IMPACT REPORT or NEGATIVE DECLARATION pursuant to applicable standards,
and (b) have been avoided or mifigated pursuant to that earlier ENVIRONMENTL
IMPACT REPORT or NEGATIVE DECLARATION, including revisions or mitigation
measures that are imposed upon the Proposed Project. Therefore, nothing ftirther is
required.
Piamer Signature
Plan.ning DiYector's; Signature
Date
Q/Q/on
Date
July-2007 •' » 4775-09
NAHI Western Segment Realignm.ent Project MND
' Section 3.0
EnWronrrientol /m/joct Assessment Form - Initial Study
ENVIRONMENTAL IMPACTS
STATE CEQA GUIDELINES, Chapter 3, Article 5, Section 15063 requires that the City
conduct an Environmental Impact Assessment to determine if a project may have a significant
effect on the environment. The Environmental Impact Assessment appears in the following
pages in the form of a checklist. This checklist identifies any physical, biological and human
factors that might be impacted by the Proposed Project and provides the City with inforrnafion to
use as the basis for; deciding whether to prepare an Environmental Impact Report (EIR),
Negative Declaration,:or to:rely on a previously approved EIR or Negative Declarafion.
• A brief explanation is required for all answers except "No Impact" answers that are
adequately supported by an information source cited in the parentheses following each
question. A "No Impact" answer is adequately supported if the referenced information
sources show that the impact simply does not apply to projects like the one involved. A
"No Impact" answer should be explained when there is no source document to refer to, or
it is based on project-specific factors as well as general standards.
• "Less Than Significant Impact" applies where there is supporting evidence that the
potential impact is not significantly adverse, and the impact does not exceed adopted
general standards and policies.
• "Potenfially Significant Unless Mitigafion hicorporated" applies where the incorporafion
of mitigafion measures has reduced an effect from "Potenfially Significant Impact" to a
"Less Than Significant Impact." The developer (in this case, the City of Carisbad, since
the project is a public works project) must agree to the mifigation, and the City must
describe the mitigation measures, and briefly explain how they reduce the effect to a less
than significant level.
• "Potentially Significant Impact" is appropriate if there is substanfial evidence that an
effect is significantly adverse.
• Based on an "EIA-Part II", if a Proposed Project could have a potentially significant
adverse effect on the environment, but all potentially significant adverse effects (a) have
been analyzed adequately in an eariier EIR or Mitigated Negative Declaration pursuant to
applicable standards and (b) have been avoided or mitigated pursuant to that eariier EIR
or Mitigated Negative Declaration, including revisions or mitigation measures that are
imposed upon the Proposed Project,^and^4none of the circumstances requiring a
supplement to or supplemental EIR are present and all the mitigation measures required
by the prior environmental document have been incorporated into this project, then no
additional environmental document is required.
July 2007-4775-09.
NAHI Western Segment t^ealignment Project MND;-: ^ --^ ., . '^''^.
Section 3.0
Env/ronmento/ Impaa Assessment Form - Initial Study
• When "Potentially Significant Impact" is checked the project is not necessarily required
to prepare an EIR if the significant adverse effect has been analyzed adequately in an
eariier EIR pursuant to applicable standards and the effect will be mitigated, or a
"Statement of Overriding Considerations" has been made pursuant to that eariier EIR.
• A Negative Declaration may be prepared if the City perceives no substantial evidence
that the projecf or any of its aspects may cause a significant adverse effect on the
environment.
• If there are one or more potentially significant adverse effects, the City may avoid
preparing ah EIR if there are mitigation measures to cleariy reduce adverse impacts to
less than significant, and those mitigation measures are agreed to by the developer (i.e.,
City) prior to public review. In this case, the appropriate "Potenfially Significant Impact
Unless Mitigation Incorporated" may be checked and a Mifigated Negative Declaration
may be prepared.
• An EIR must be prepared if "Potentially Significant Impact" is checked, and including
but not limited to the following circumstances: (1) the potenfially significant adverse
effect has not been discussed or mifigated in an eariier EIR pursuant to applicable
standards, and the City does not agree to mitigation measures that reduce the adverse
impact to less than significant; (2) a "Statement of Overriding Considerations" for the
significant adverse impact has not been made pursuant to an eariier EIR; (3) proposed
mifigation measures do not reduce the.adverse impact to less than significant; or (4)
through the EIA-Part II analysis it is not possible to determine the level of significance
for a potenfially adverse effect, or determine the effecfiveness of a mitigation measure in
reducing a potentially significant effect to below a level of significance.
A discussion of potential impacts and the proposed mifigafion measures appears at the end ofthe
form under DISCUSSION OF ENVIRONMENTAL EVALUATION. Particular attention
should be given to discussing mitigation for impacts, which would otherwise be determined
significant.
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NAHI Western Segment Realignment Proje'ct MND ^'^
Env/ronmento/ Impaa Assessment Form
Sect/on 3.0
Initial Study
Issues (and SuDDortina Information Sources).
Potentially
Significant
Impact
Potentially
Significant
Unless
Mitigation
Incorporated
Less Than
Significant
Impact
No
Impact
I. AESTHETICS - Would the project:
a) Have a substantial adverse effect on a scenic vista? • u • U
b) Substantially damage scenic resources, including but not
limited to, trees, rock outcroppings, and historic buildings
within a State scenic highway?
• • • IE!
c) Substantially degrade the existing visual character or
quality of the site and its surroundings?
• • •
d) Create a new source of substantial light and glare, which
would adversely affect day or nighttime views in the area?
• • • lEl
II. AGRICULTURAL RESOURCES - (In determining whether impacts to agricultural resources are significant
environmental effects, lead agencies may refer to the Califomia Agricultural Land Evaluation and Site Assessment
Model-1997 prepared by the California Department of Conservation as an optional model to use in assessing impacts
on agriculture and farmland.) Would the project:
a) Convert Prime Farmland, Unique Farmland, or Farmland of
Statewide Importance (Farmland), as shown on the maps
prepared pursuant to the Farmland Mapping and
Monitoring Program of the California Resources Agency, to
non-agricultural use?
u • u
b) Conflict with existing zoning for agricultural use, or a
, Williamson Act contract?
• • •
c) Involve other changes in the existing environment, which,
due to their location or nature, could result in conversion of
Farmland to non-agricultural use?
• • •
III. AIR QUALITY - (Where available, the significance criteria established by the applicable air quality management or air
pollution control district may be relied upon to make the following determinations.) Would the project:
a) Conflict with or obstruct implementation of the applicable
air quality plan?
• • u
b) Violate any air quality standard or contribute substantially
to an existing or projected air quality violation?
• • lEl •
c) Result in a cumulatively considerable net increase of any
criteria pollutant for which the project region is in non-
attainment under an applicable federal or state ambient air
quality standard (including releasing emissions which
exceed quantitative thresholds for ozone precursors)?
• • •
d) Expose sensitive receptors to substantial pollutant
concentrations?
• • lEl •
July200,7 4775-09
NAHI Western Segment Realignment Project MND 3-6
Env/ronmento/ /mf>oct Assessment Form
Sect/on 3.0
Initial Study
Issues (and Supporting Information Sources).
Potentially
Significant
Impact
Potentially
Significant
Unless
Mitigation
Incorporated
Less Than
Significant
Impact
No
Impact
e) Create objectionable odors affecting a substantial number
of people?
• • •
IV. BIOLOGICAL RESOURCES - Would the project: . v
a) Have a substantial adverse effect, either directly or through
habitat modifications, on any . species identified' as.'a '
• candidate, sensitive,.or special status species-in local "oj;.
regional plans, policies, or regulations, or byXaliforhia
Department of Fish and Game or U.S. Fish and Wildlife
Service?
, u u
b) Have a substantial adverse effect on any riparian, aquatic
or wetland habitat or other sensitive natural community
identified in local or regional plans, policies, or regulations
or by California Department of Fish and Game or U.S. Fish
and Wildlife Service? • ,
• • • 13
c) Have a substantial adverse effect on federally protected
wetlands as defined by Section 404 of the Clean Water Act
(including but not limited to marsh, vernal pool, coastal,
etc.) through direct removal, filing, hydrologlcal
interruption, or other means?
• • •
d) Interfere substantially with the movement of any native
resident or migratory fish or wildlife species or with
established native resident or migratory wildlife, corridors,
orimpedethe'useof native wildlife nursery sites? , .:
• • •
e) Conflict with any local policies or ordinances protecting;
biological resources, such as a tree preservation policy or
ordinance?
• Q.
f) Conflict . with the provisions of an adopted Habitat
Conservation Plan, Natural Community Conservation Plan,
or other approved local, regional, or' state habitat
conservation plan?
• • - •
V. CULTURAL RESOURCES - Would the project:
a) Cause a substantial adverse change in the significance of
a historical resource as defined in §15064.5?
• • U.
b) Cause a substantial adverse change in the significance of
an archeological resource pursuant to §15064.5?
„ • • •
c) Directly or indirectly destroy a unique paleontological
resource or site or unique geologic feature? .,•.
• m • •
July2007
NAHI Western Segment RealignmehtProje'ct MND
,4775-09
3-7
Environmental Impaa Assessment Form
Section 3.0
Initial Study
Issues (and Supporting Information Sources).
Potentially
Significant
Impact
Potentially
Significant
Unless
Mitigation
Incorporated
Less Than
Significant
Impact
No
Impact
d) Disturb any human remains, including those interred
outside of formal cemeteries?
• ,• • •
VI. GEOLOGY AND SOILS-Would the project:
a) Expose people or structures to potential substantial
adverse effects, including the risk of loss, injury or death,
involving:
i. Rupture of a known earthquake fault, as delineated on
the most recent Alquist-Priolo Earthquake Fault
Zoning Map issued by the State Geologist for the area
or based on other substantial evidence of a known
fault? Refer to Division of Mines and Geology Special
Publication 42.
• • K
ii. Strong seismic ground shaking? • lEl • •
iii. Seismic-related ground failure, including liquefaction? • KI • •
iv. Landslides? • • • K]
b) Result in substantial soil erosion or the loss of topsoil? • KI • •
c) Be located on a geologic unit or soil that is unstable, or that
would become unstable as a result of the project, and
, potentially result in on- or off-site landslide, lateral
spreading, subsidence, liquefaction, or collapse?
• KI • • •
d) ,Be located on expansive soils, as defined in Table 18 - 1-B
of the Uniform Building Code (1997), creating substantial
risks to life or property?
• KI • U
e) Have soils incapable of adequately supporting the use of
septic tanks or alternative wastewater disposal systems
where sewers are not available for the disposal of
wastewater?
• • • KI
VII. HAZARDS AND HAZARDOUS MATERIALS-Would the project:
a) Create a significant hazard to the public or the environment
through the routine transport, use, or disposal of
hazardous materials?
• U KI
b) Create a significant hazard to the public or environment
through reasonably foreseeable upset and accident
conditions involving the release of hazardous materials into
the environment?
• • •
July 2007 •
NAHI Western Segment Realignment Project MND
4775-09
3-8
Sect/on 3.0
Environmental Impaa Assessment Form - Initial Study
Issues (and Supporting Information Sources).
Potentially
Significant
Impact
Potentially
Significant
Unless
Mitigation
Incorporated
Less Than
Significant
Impact
No
Impact
c) Emit hazardous emissions or handle hazardous or acutely
hazardous materials, substances, or waste within one-
quarter mile of an existing or proposed school?
- • • , • K
d) Be located on a site which is included on a list of
hazardous materials sites compiled pursuant to
Government Code Section 65962.5 and, as a result, would
it create a significant hazard to the public or environment?
• • • K
e) For a project within an airport land use plan, or where such
a plan has not been adopted, within two miles of a public
airport or public use airport, would the project result in a
safety hazard for people residing or working in the project
area?
• • K
f) For a project within the vicinity of a private airstrip, would
the project result in a safety hazard for people residing or
working in the project area?
• • • • KI
g) Impair implementation of or physically interfere with an
adopted emergency response plan or emergency
evacuation plan?
• • •
h) Expose people or structures to a significant risk of loss,
injury or death involving wildland fires, including where
wildlands are adjacent to urbanized areas or where
residences are intermixed with wildlands?
• • • KI
VIII. HYDROLOGY AND WATER QUALITY-Would the project:
a) Violate any water quality standards or waste discharge
requirements?
• u . U
b) Substantially deplete groundwater supplies or interfere
substantially with ground water recharge such that there
would be a net deficit in aquifer volume or a lowering of the
local ground water table level (i.e., the production rate of
pre-existing nearby wells would drop to a level which would
not support existing land uses or planned uses fbr which
permits have been granted)?
• • KI U
c) Substantially alter the existing drainage pattern of the site
or area, including through the alteration of the course of a
stream or river, in a manner, which would result in
substantial erosion or siltation on- or off-site?
• • KI •
July 2007 4775-09
NAHI Western Segment Realignment Project MND 3-9
Sect/on 3.0
Env/ronmento/ Impaa Assessment Form - Initial Study
Issues (and Supporting Information Sources).
Potentially
Significant
Impact
Potentially
Significant
Unless
Mitigation
Incorporated
Less Than
Significant
Impact
No
Impact
d) Substantially alter the existing drainage pattern of the site
or area, including through the alteration of the course of a
stream or river, or substantially increase the flow rate or
amount (volume) of surface runoff in a manner, which
would result in flooding on- or off-site?
• • 13 u
' e) Create or contribute runoff water, which would exceed.the
capacity of existing or planned stormwater drainage
systems or provide substantial additional sources of
polluted runoff?
• • • .• K •
f) Otherwise substantially degrade water quality? • K . • •
g) Place housing within a 100-year flood hazard area as
mapped on a Federal Flood Hazard Boundary or Flood
Insurance Rate Map or other flood delineation map?
• • • KI
h) Place within 100-year flood hazard area structures, which
would impede or redirect flood flows?
• • KI •
i) Expose people or structures to a significant risk of loss
injury or death involving flooding, including flooding as a
result of the failure of a levee or dam?
• • • KI
j) Inundation by seiche, tsunami, or mudflow? • • . KI •
IX. LAND USE AND PLANNING - Would the project:
a) Physically divide an established community? •• , • •. U
b) Conflict with any applicable land use plan, policy, or
regulation of an agency with jurisdiction over the project
(including but not limited to the general plan, specific plan,
local coastal program, or zoning ordinance) adopted for the
purpose of avoiding or mitigating an environmental effect?
• • KI •
c) Conflict with any applicable habitat conservation plan or
natural community conservation plan?
• • KI •
X. MINERAL RESOURCES - Would the project:
a) Result, in the. loss of availability of a known mineral
resource that would be of future value to the region and the
residents of the State?
• • u 1^
b) Result in the loss of availability of a locally important
•mineral resource recovery site • delineated on a local
general plan', specific plan, or other land use plan?
• • • KI
July 2007 4775-09
NAHI Western Segment Realignment Project MND 3-10
Env/ronmento/ Impact Assessment Form
Seaion 3.0
Initial Study
Issues (and SuDDortina Information Sources).
Potentially
Significant
Impact
Potentially
Significant;
Unless
Mitigation
Incorporated
Less Than
Significant
Impact
No
Impact
X. NOISE - Would the project result in: .
a) Exposure of persons to or generation of noise levels ih
excess of standards established in the local general plan
or noise ordinance or applicable standards - of other
agencies? ; .,
• 13 U
•b) Exposure of pe'rsons to or., generation -of excessive
• groundbourne vibration or groundbourne noise levels? • •:v-v:B.. •
c) A substantial permanent increase in ambient noise levels
, in the project vicinity above levels existing without the
project?
• • •. KI
d) A substantial temporary or periodic increase in ambient
noise levels in the project vicinity above levels existing
without the project?
• • K •
e) For a project located-within an airport land use plan or,
where such a plan has not been adopted, within 2 miles of
a public airport or public use airport, would the project
expose people residing or working in the project area to
excessive noise levels?
• • • K
f) For a project within the vicinity of a private airstrip, would
. the project expose people residing or working in .the project
area,to excessive noise levels?
• • • K
XII. POPULATION AND HOUSING - Would the project: V
a) Induce substantial growth in an area either directly (for
example, by proposing new homes and businesses) or
indirectly (for example, through extension of roads or other
infrastructure)?
u U KI
b) Displace substantial numbers of existing housing,
necessitating the construction of replacement housing
elsewhere?-
• • • KI
c) Displace substantial numbers of people, necessitating the
construction of replacement housing elsewhere?
• • 3
Xlll. PUBLIC SERVICES
a) Would the project result in substantial adverse physical impacts associated with the provision of new or physically
altered government facilities, a need for new or physically altered government facilities, the construction of which
could cause significant environmental impacts,, in order to maintain acceptable service ratios, response times, or
other performance objectives for any of the public services:, .' . , •. •
• July 2007 -4775-09.
NAHI Western' Segm^nt Realignment Project MND 3-1 I
Section 3.0
Environmental Impact Assessment Form - /n/t/o/ Study
Issues (and Supporting Information Sources).
Potentially
Significant
Impact
Potentially .
Significant
Unless
Mitigation
Incorporated
Less Than
Significant
Impact
No
Impact
i) Fire protection? • . - •';. • . , 13-•
ii) Police protection? • • K
. iii) Schools? :. , • , ••;'-• , • KI
iv> Parks?'., • O ; v ; , •... ' ] ••
v) Other public facilities? . . • K •
XIV. RECREATION
a) Would the project increase the use of existing
neighborhood and regional parks or other recreational
facilities such that substantial physical deterioration of the
facility would occur or be accelerated?
• • U KI
b) Does the project include recreational facilities or require
the construction or expansion of recreational facilities,
which might have an adverse physical effect on the
environment?
• • . • KI
XV. TRANSPORTATION/TRAFFIC - Would the project:
a) Cause an increase in traffic, which is substantial in relation
to the existing traffic load, and capacity of the street system
(i.e., resuit in a substantial increase in either the number of
vehicle trips, the volume to capacity ratio on roads, or
congestion at intersections)? , ,•
• KI U
b) Exceed, either individually or cumulatively, a level of
service standard established by the county congestion
management agency for designated roads or highways?
• • KI . •
c) Result in a change in air traffic patterns, including either an
increase in traffic levels or a change in location that results
in substantial safety risks?
• • •
d) Substantially increase hazards due to a design feature
(e.g., sharp curves or dangerous intersections) or
incompatible uses (e;g., farm equipment)?"
• • •
e) Result in inadequate emergency access? • • • KI
f) Result in insufficient parking capacity? • KI •
July2007
NAHI Western Segment Realignment Project MND;;
4775-09
3-12
Environmental Impaa Assessment Form
Seaion 3.0
Initial Study
Issues (and Supporting Information Sources).
Potentially
Significant
Impact
Potentially
Significant
Unless
Mitigation
Incorporated
Less Than
Significant
Impact
No
Impact
g) Conflict with adopted policies, plans, or programs
supporting alternative transportation (e.g., bus turn-outs,
bicycle racks)?
• , • • KI
XVI. UTILITIES AND SERVICES SYSTEMS - Would the project:
a) Exceed wastewater treatment requirements of the
applicable Regional.Water Quality Control Board? •
• • • KI
b) Require or result in the construction of new water or
wastewater treatment facilities or expansion of existing
facilities, the construction of which would cause significant
environmental effects?
• -• • KI
c) Require or result in the construction of new storm water
drainage facilities or expansion of existing facilities, the
construction of which could cause significant
environmental effects?
• • • KI
d) Have sufficient water supplies available to serve the
project from existing entitlements and resources, or are
new or expanded entitlements needed?
• • • KI
e) Result in a determination by the wastewater treatment
provider, which serves or may serve the project that it has
adequate capacity to serve the project's projected demand
in addition to the provider's existing commitments?
• • •
f) Be served by a landfill with sufficient permitted capacity to
accommodate the project's solid waste disposal needs?
• • • K •
g) Comply with federal, state, and local statutes and
regulations related to solid waste?
• • • KI
XVll. MANDATORY FINDINGS OF SIGNIFICANCE
a) Does the project have the potential to degrade the quality of
the environment, substantially reduce the habitat of a fish
or wildlife species, cause a fish or wildlife population to
drop below self-sustaining levels, threaten to eliminate a
plant or animal community, reduce the number or restrict
the range of a rare or endangered plant or animal or
eliminate important examples of the major periods of
California history or prehistory?
• KI U U
July 2007 4775-09
NAHI,Western Segment Realignment Project MND 3-13
Sect/on 3.0
Env/ronmento/ Impaa Assessment Form - Initial Study
Issues (and Supporting Information Sources).
Potentially
Significant
Impact
Potentially
Significant
Unless
Mitigation
Incorporated
Less Than
Significant
Impact
No
Impact
b) Does the project have impacts that are individually limited,
but cumulatively considerable? ("Cumulatively
considerable" means that the incremental effects of a
project are considerable when viewed in connection with
the effects of past projects, the effects of other current
projects, and the effects of probable future projects?)
• KI • •
c) Does the project have environmental effects, which will cause
the substantial adverse effects on human beings, either
directly or indirectly?
KI •
XVlll. EARLIER ANALYSES
Earlier analyses may be used where, pursuant to the tiering, program EIR, or other CEQA
process, one or more effects have been adequately analyzed in an earlier EIR or negative
declarafion (Secfion 15063(c)(3)(D)). In this case a discussion should idenfify the
following on attached sheets:
a) Earlier analyses used. Identify earlier analyses and state where they are available
for review.
b) Impacts adequately addressed. Identify which effects from the above checklist
were within the scope of and adequately analyzed in an earlier document pursuant
to applicable legal standards, and state whether such effects were addressed by
mitigation measures based on the earlier analysis.
c) Mitigation measures. For effects that are "Less Than Significant with Mifigation
Incorporated," describe the mitigation measures, which were incorporated or
refined from the earlier document and the extent to which they address site-
specific conditions for the project.
July 2007 4775-09
NAHI Western Segnient Realignment Project MND 3-14
Sect/on 3.0
Env/ronmento/ Impact Assessment Form - Initial Study
DISCUSSION OF ENVIRONMENTAL EVALUATION
I. AESTHETICS - Would the project:
a. Have a substantial adverse effect on a scenic vista?
Less Than Significant Impact The current views of the northem shoreline of Agua
Hedionda Lagoon consist primarily of coastal bluffs dominated by native vegetation.
Patches of development also exist along the shoreline, including a boat rental area to the
west of the project site and private residences adjacent to Hoover Street and Cove Drive.
The project site is visible to motorists from 1-5 North, the railroad tracks. Hoover Street,
Cove Drive and to boat users of the lagoon.
The Proposed Project would not introduce new permanent structures along the northem
shore of Agua Hedionda Lagoon and therefore would not create long-term impacts to
visual resources from public vantage points. The project would however, cause short-
term impacts due to construction activifies. Due to the temporary nature of these impacts
(approximately four months), visual impact due to construction would be less than
significant.
b. Substantially damage scenic resources, including, but not limited to trees, rock
outcroppings, and historic buildings within a state scenic highway.
No Impact The project corridor is not visible from a state scenic highway.
c. Substantially degrade the existing visual character or quality ofthe project site and its
surroundings?
Less than significant Impact See response I-a.
d Create a new source of substantial light or glare which would adversely affect day or
nighttime views in the area?
No Impact: No lighting is planned as an element of the Proposed Project and there are
no above ground stmctures proposed. Therefore, the Project will not result in new light
or glare.
July2007. ^, , • . . ";•,'. • . .4775-09
NAHI Western Segment Realignment Project MND . , ' 3-15
Sect/on 3.0
Env/ronmento/ Impaa Assessment Form - Initial Study
IL AGRICULTURE RESOURCES - Would the project:
a. Convert Prime Farmland, Unique Farmland, or Farmland of Statewide Importance
(Farmland), as shown on the maps prepared pursuant to the Farmland Mapping and
Monitoring Program of the California Resources Agency, to non-agricultural use?
No Impact According to the State of Califomia Department of Conservation, Division
of Land Protection "1998 Important Farmland Map," the Proposed Project site does not
contain Prime Farmland, Unique Farmland or Farmland of Statewide Importance.
b. Confiict with existing zoning for agriculture use, or a Williamson Act contract?
No Impact The proposed project site is not zoned for agricultural use, therefore no
impact would occur.
c Involve other changes in the existing environment which, due to their location or
nature, could result in conversion of Farmland to non-agricultural use?
No Impact As described in responses Il-a) and Il-b) above, no portion of the project is
located within or adjacent to existing agricultural areas, nor would facilities necessary for
project implementation or operation result in the conversion of farmland to urban use.
Therefore, conversion of existing farmland to urban uses will not occur
ML AIR QUALITY - Would the project:
a. Conflict with or obstruct implementation of the applicable air quality plan?
No Impact The project site is located in the San Diego Air Basin which is a federal and
state non-attainment area for ozone (03), and a state non-attainment area for particulate
matter less than or equal to 10 microns in diameter (PMIO). The periodic violations of
national Ambient Air Quality Standards (AAQS) in the San Diego Air Basin (SDAB),
particularly for ozone in inland foothill areas, requires that a plan be developed outlining
the pollution controls that will be undertaken to improve air quality. In San Diego
County, this attainment plarming process is embodied in the Regional Air Quality
Strategies (RAQS) developed joinfiy by the Air Pollution Control District (APCD) and
the San Diego Association of Governments (SANDAG).
July200Z-. ,'•:...,,..,.•:,.:>,• Z' Z-.'-\^JZ. ] ' I.\ 4775-09
NAHI-Western Segment Realigninent Project MND -' ' 3-16'
Section 3.0
Environmental Impaa Assessment Form - Initial Study
A plan to meet the federal standard for ozone was developed in 1994 during the process
of updating the 1991 state-mandated plan. This local plan was combined with plans from
all other Califomia non-attainment areas having serious ozone problems and used to
create the Califomia State Implementation Plan (SIP). The SIP was adopted by the Air
Resources Board (ARB) after public hearings on November 9th through lOth in 1994,
and was forwarded to the Environmental Protection Agency (EPA) for approval. After
considerable analysis and debate, particularly regarding airsheds with the worst smog
problems, EPA approved the SIP in mi-1996.
The Proposed Project relates to the SIP and/or RAQS through the land use and growth
assumptions that are incorporated into the air quality planning document. These growth
assumptions are based on each city's and the Country's general plan. If a Proposed
Project is consistent with its applicable General Plan, the project presumably has been
anticipated with the regional air quality planning process. Such consistency would
ensure that the project would not have an adverse regional air quality impact.
Section 15125(B) ofthe State of Califomia Environment Quality Act (CEQA) Guidelines
contains specific reference to the need to evaluate any inconsistencies between the
Proposed Project and the applicable air quality management plan. Transportation Control
Measures (TCMs) are part of the RAQS. The RAQS and TCM plan set forth the steps
needed to accomplish attainment of state and federal ambient air quality standards. The
Califomia Air Resources Board provides criteria for determining whether a project
conforms with the RAQS which include the following:
• Is a regional air quafity plan being implemented in the project area?
• Is the project consistent with the growth assumptions in the regional air quality
plan?
The project area is located in the San Diego Air Basin, and as such, is located in an area
where a RAQS is being implemented. The project is consistent with the growth
assumpfions of the City's General Plan and the RAQS. Therefore, the project is
consistent with the regional air quality plan and will in no way conflict with or obstruct
implementation of the regional plan.
b. Violate any air quality standard or contribute substantially to an existing or projected
air quality violation?
Less Than Significant Impact The closest air quality monitoring station to the project is
located at Camp Pendleton. Data available for the San Diego APCD's Camp Pendleton
July2007 .;;,- -y'..,' . 4775-09
NAHI Western Segment Realignment Project MND • -3-17
. Sect/on 3.0
Environmental Impaa Assessment Form - Initial Study
air quality control monitoring site indicates that the federal 8-hour ozone standard, which
was formally adopted in. 2001, was exceeded at the Camp Pendleton monitoring station
twice in 2004. , '
The project would involve minimal short-term emissions associated with trenching and
microtunneling constmction. Such emissions would be. minimized through standard
construction, measures such as the use of properly tuned equipment and watering the site
for dust control. Long-term emissions associated with travel to and from the project will
be minimal., Although air pollutant emissions would be associated..\vith the project, they
\y,o,uld neither result, in the violation of any air quality standard (comprising only an
incremental contribution to overall air basin quality readings), nor contribute
substantially to an existing or projected air quality violation. Any impact is assessed as
less than significant.
Result in a cumulative considerable net increase of any criteria pollutant for which the
project region is in non-attainment under an applicable federal or state ambient air
quality standard?
Less Than Signiflcant Impact The Air Basin is currently .in a non-attainment zone for
ozone and suspended fine particulates. The Proposed Project would represent a
contribution to a cumulatively considerable potential net increase in emissions throughout
the air basin. As described above, however, ernissions associated with the Proposed
Project would be minimal. Given the limited emissions potentially associated with the
Proposed Project, air quality would be essentially the same whether or not the Proposed
Project is implemerited. According to the CEQA Guidelines Section 15130 (a) (4), the
Proposed Project's contribution to the cumulative impact is considered (ie m/nz/TiM^. Any
impact is assessed as less than significant.
Expose sensitive receptors to substantial pollutant concentrations?
Less Than Significant Impact As shown in Figure 2-3, residences are located within
the project vicinity. No other sensitive receptors (e.g., schools or hospitals) are located in
the vicinity of the Proposed Project. As noted above, the Proposed Project would not
result in substanfial pollutant emissions or concentrafions. Therefore, impacts to
sensitive receptors would be less than significant.
:july2d07'-;^;;'/,-5;.:V-,;S.'.:';^ : -'^ -,' : Z^'ft'''-.W-- ' • 'IZ y'''''''-'!Z^''j'''^ 4775-09'
NAHI Western Segmeht.Realignment Project MND .. • . ; • . •;, • . ', ' 3-18-
I
Seaion 3.0
Environmental Impaa Assessment Form - Initial Study
e. Create objectionable odors affecting a substantial number of people?
Less Than Significant Impact The constmction of the Proposed Project could generate
fumes from the operation of constmction equipment and from asphalt paving and
grading, which may be considered objectionable by some people. Such exposures would
be short-term and/or transient since they would occur during the constmction phase only,
and would not reach a level of significance.
IV. BIOLOGICAL RESOURCES-WOULD THE PROJECT:
A biological resources letter report was prepared for the project by Dudek, Febmary 2007, and is
provided as Attachment A. This report provides the basis for the biological analysis contained
below.
a. Have a substantial adverse effect, either directly or through habitat modifications, on
any species identified as a candidate, sensitive or special status species in local or
regional plans, policies, or regulations, or by the California Department of Fish and
Game or U.S. Fish and Wildlife Service ?
Potentially Significant Impact Unless Mitigation Incorporated.
The various components of the project include: staging, frenching, microtunnelling, and
access. Once constmction has been completed, the exisfing western segment ofthe
NAHI will be abandoned in place. All aspects of the project are incorporated into the
Constmction Footprint shown in Figure 2-3.
As discussed in more detail in Attachment A, Biological Resources Letter Report, Dudek
Febmary 2007, the microtunnel only areas will have no ground disturbance during
constmction and the presence of the underground pipe below the surface will not affect
the viability of vegetation or habitat conditions and therefore no impacts would occur.
Access to construcfion areas would utilize the existing compacted sandy base. Given that
no material is being deposited, no stmctures are being built, and future traffic will be
uncommon, this aspect ofthe project would not alter current environmental conditions in
that area.
Constmction plans for proposed staging area B, depicted in Figure 2-3 will include
project design (PD) feature BIO-1 which will note that additional resource avoidance is
July2007 ;, ,," '; ..,, ' V . .4775-09
NAHI Western Segment Realignment Project.MND ^ 3-19
Sect/on 3.0
Env/ronmento/ Impact Assessment form - Initial Study
necessary in this area due to the presence of coastal sage scmb. Implementation of PD-
BIO-I shall ensure that no direct impacts to coastal sage scmb (including disturbed
forms) within staging area B will occur through the placement of temporary fencing and
monitoring by a qualified biologist (see F/gure i-7).
Direct Impacts
Implerhentation of the proposed project would result in direi^t permanent impacts to
vegetation comrnunities; and. land coyer types listed in Table 3-7 and shown in Figures 3-
7 through 3-5.. No. direct impacts to jurisdictional waters or environmentally sensitive
habitat areas (ESHA) wouldl occur as a result of the project.
TABLE 3-1
IMPACTS TO VEGETATION COMMUNITIES & LAND COVER TYPES
Vegetation Community/Land Cover Type Construction Footprint
Annual Grassland 0.00
Coastal Salt Marsh 0.00
Disturbed Coastal Salt Marsh ' °^ 0.00
Coastal Sage Scrub 0.00
Disturbed Coastal Sage Scrub 0.00
Developed Land 0.22
Developed Land -Jurisdictional 0.00 '" . ., ,
Disturbed Land^ '1.26
Eucalyptus Woodland ' 0.00
Intertidal Mudflat ' 0.00
Intertidal Rocky Beach 0.00
Ornamental Plantings 0.01
Open Water 0.00
Disturbed Southern Willow Scrub 0.00
TOTAL 1.48
^ Areas mechanically disturbed such that they will not support native vegetation without restoration.
Regarding sensitive plant and wildlife species, the project avoids impacts to all known
sensitive plant and wildlife species locafions as well as suitable habitat areas. Therefore,
no direct impacts to sensitive plant or wildlife species would occur. Direct impacts to
disturbed habitat, developed land, and ornamental plantings are not considered significant
due to the lack of native species utilizing these land cover types.
July .2007. 4775-09
NAHI Western Segnient Realignment Projecf MND , 3-20
SEE FIGURE 3-2 FOR BIOLOGICAL
RESOURCES LEGEND
NAHI Western Segment Realignment Project • MND
BEST ORIGINAL ^'^'^Oical Resources & Jurisdictional Delination Map
HGURE
3-1
VEGETATION TYPES/LANDCOVERS:
Annual Grassland AGL DH
CSM
CSS
DEV
Coastal Salt Marsh
Coastal Sage Scrub
Developed Land
EOC
IM
IRB
Disturbed Habitat
Eucalyptus Woodland
Intertidal Mudflat
Intertidal Rocky Beach
NOTE: A lower case'd' in front of a vegetation type designator indicates that it is disturbed.
An upper case 'J' following a vegetation type designator indicates that it is Jurisdictional.
-.7' 7! Waters of the G. S.
(Number indicates width of unvegetated
channeL)
Data Station
Relocated
Conventional Open Trench
Relocated Microtunneling
Microtunneling Pit Area
Staging Area
SENSITIVE ANIMAL SPECIES:
CAGNOf Califomia gnatcatcher (Dudek, 2001)
CAGN07 Califomia gnatcatcher (Dudek, 2007)
SMS Salt marsh skipper (Dudek, 2003)
BASE PHOTO SOURCE: CITY OF CARLSBAD
SEWER SYSTEM SOURCE: CITY OF CARLSBAD GIS DEPT. (ADJUSTED TO TOPOGRAPHIC FEATURES)
ORN
OW
Ornamental
Open Water
SWS Southern Willow Scrub
Study Area
Construction Footprint
Impact
Proposed Non-Improved
Access Road Impact
Proposed Sewer Lateral
Existing Sewer System
CAGN General Area of
Calling/Movement (2001)
SENSITIVE PLANT SPECIES:
Ac Adolphia califomica
Ja Juncus acutus ssp. leopoldii
NOTE: Number indicates indhidual plant
counts at that location.
NAHI Western Segment Realignment Project • MND
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FIGURE
3-2
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FIGURE
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NAHI Western Segment Realignment Project - MND I FIGURE
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Indirect Impacts
Indirect impacts to. vegetation communities and waters from the proposed project
primarily would result fi-om adverse construction-related "edge effects" that may include
dust, soil erosion, pollution, siltation, and runoff Most ofthe indirect impacts to
vegetation communities and waters can also affect sensitive wildlife. In addition, short-
term noise during construction has the potential to affect wildlife activity including bird
breeding behavior.
Standard construction: Best Management Tractic^ and construction-related
minimization measures tp control dust, erosion, and runoff will be implemented and will
ameliorate these effects (refer to Section VIII, Hydrology and Water Quality, response a).
Therefore, significant indirect impacts to sensitive plant and wildlife species fi-om soil
erosion and runoff would be avoided through these measures.
Noise related impacts to sensitive breeding birds including the Califomia gnatcatcher are
considered potentially significant. Implementation of Mitigation Measure BIO-l would
reduce this impact to less than significant.
Mitigation Measures for Sensitive Wildlife Species
BIO-1
• The City construction contractor shall avoid construction activities outside ofthe
February IS through August 31 bird breeding season; or
• A qualified biologist shall conduct a focused survey for bird nests 500 feet from
construction activities not more than 72 hours prior to commencement of
construction. If active nests are found, noise levels at or below 60 dBA Leq shall
be maintained anywhere within 300 feet of occupied nest locations of sensitive
species. The maintenance of acceptable noise levels shall be confirmed through
noise measurements at active nest locations during peak construction activity by a
qualified acoustician.
Have a substantial adverse effect on riparian habitat or other sensitive natural
community identified in local or regional plans, policies, regulations or by the
California Department of Fish and Game or U.S. Fish and Wildlife Service?
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. No Impact. The project has been designed to avoid riparian, aquatic or wetland habitat.
Therefore no direct or indirect impacts to riparian, aquatic or wetland habitat would occur
as a result of the project. See Response IV-a.
c. Have a substantial adverse effect on federally protected wetlands as defined by Section
404 of the Clean Water Act (including, but not limited to, marsh, vernal pool, coastal,
etc.) through direct removal, filling, hydrologlcal interruption, or other means?
• No Impact. The project has been designed to avoid riparian, aquatic or wetland habitat.
: Therefore no'direct or indirect impacts to federally protected wefiands as defined by
Secfion 404 of the Glean Water Act would occur as a resuh of the proposed project. See
Response IV-a.
d Interfere substantially with the movement of any native resident or migratory fish or
wildlife species or with established native resident or migratory wildlife corridors, or
impede the use of native wildlife nursery sites?
Less Than Significant Impact Due to its locafion and surrounding residential
development, the habitat present within the project site is not coimected to any substantial
natural terrestrial habitat. Several small patches of coastal sage scrub occur northeast of
the site but are separated by development. The Proposed Project would not introduce
new permanent structures along the northem shore of Agua Hedionda and therefore
would not substantially interfere with wildlife movement.
e. Conflict with any local policies or ordinance protecting biological resources, such as a
tree preservation policy or ordinance?
Less than Significant Impact The project corridor is located within Focus Planning
Area (FPA) Core 4 of the Draft Habitat Management Plan (HMP) for Natural
Communities in the City of Carlsbad. The proposed project complies with the HMP due
to the avoidance of direct impacts to covered species and habitat. With the
implementation of mitigation measures for indirect impacts, no resources covered by the
HMP would be affected by implementation of the project.
/ Conflict with the provisions of an adopted Habitat Conservation Plan, Natural
Community Conservation Plan or other approved local, regional or state habitat
conservation plan?
Less Than Significant Impact. See Response (c) above.
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V. CULTURAL RESOURCES- Would the project:
A Cultural Resources Survey was prepared for the project by Gallegos & Associates,
February 2007, and is hereby incorporated by reference. This report provides the basis
for the cultural resources analysis contained below.
a. Cause a substantial adverse change in the significance of a historical resource as
defined in § 15064.5?
No Impact. As, af esult bf the record search conducted at the Soufii Coastal Irifbrmation
• Center, San Diego, State University, none ofthe, following were identified: National
Register of Historic Places, Califomia Register of Historic Resources, Califomia State
Landmarks, Califomia Points of Historic Interest or other historic property lists. Early
historic maps were also reviewed to identify stmctures and this was also negative,
identifying no early historic strucfiires. In addition to the literature review, a field survey
was conducted and no historic structures or features were identified within the project
area. Therefore, no impacts to historical resources would result.
b. Cause a substantial adverse change in the significance of an archaeological resource
pursuant to 115064.5?
Potentially Significant Impact Unless Mitigation Incorporated The record search
conducted at the South Coastal Information Center, San Diego State University identified
one previously,recorded' site (CA-SDI-13701) within the project area. The field survey
relocated site CA-SDI-13701 and identified one previously unrecorded site (NAHI-S-1).
These sites have'not been tested to determine site significance;
Potentially significant impacts to these sites due to project constmction would be
mitigated to less than significant by implementing the following mitigation measures:
CULT-1 Testing to Determine Site Significance and Monitoring of all earthmoving
activities shall occur to the satisfaction of the City of Carisbad Planning
Department. Testing and Archaeological Monitoring shall consist of the
following measures:
• Testing. Prior to ground disfiirbance activities, test those sites that have
not yet been tested-so that a determination of significance can be made. If
the resource is determined to be significant, then impacts shall be
mitigated through avoidance if feasible. If avoidance is not feasible, then
NAHI Western^SegmentRealignnnent Project MWDJ' .^ . ' . : . Z: --''ZZ:ir'''
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mitigation of impacts through the completion of a data recovery program
shall be required. - ,
• Data Recoverv.. If site avoidance, the preferred mitigation measure, is not
feasible, then a data recovery program shall be prepared and approved by
the City of Carisbad Yo recover a large enough sample of cultural material
so that information of importance in addressing regional research
questions will not be irretrievably lost through impacts.
. ,, > Monitoring. A qualified archaeblogicar monitor and Native American
monitor shall be provided during construction so that buried cultural
resources can be identified in the field. Upon idenfificafion, the
resource(s) shall be tested to determine significance with appropriate
mitigation measures used as identified above.
The City of Carisbad Cultural Resource Guidelines provide the following specific
measures to conduct the monitoring and evaluafion program that shall be used for cultural
resources within the NAHI project area.
Prior to Preconstruction (Precon) Meeting
1. Planning Department (PD) Plan Check
a. Prior to the first Precon Meeting, the Environmental CompHance Officer/Planner
(ECO/P) of PD shall verify that the. requirements for Archaeological Monitoring
and Native American monitoring, if applicable, have been noted on the
appropriate constmction documents.
2. Submit Letter of Qualification to ECO/P
a. Prior to the first Precon Meeting, the applicant shall provide a letter of verification
to the ECO/P stating that a qualified Archaeologist has been retained to
implement the monitoring program..
3. Records Search Prior to Precon Meeting
a. At least thirty days prior to the Precon Meeting the qualified Archaeologist shall
, verify that a records search has'been completed and updated-as necessary and
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introduce :any„pertinent information concerning expectations and probabilities of
discovery during trenching and/or grading activities. Verificafion includes, but is
. not limited to, a copy of a confirmation letter from South Coastal Informafion
Center or a letter of.verification, that the Archaeologist has conducted a recent
, record search for the project site.
Precon Meeting
: . , , 1. .Monitor Shall Attend Precon Meetings .
• a.- Trior tiot'beginning^-any work that requires monitoring^ tlJe'"Applicant ' '
' shall arrange a Precon Meeting thaf shall include the Archaeologist, Constmction
Manager and/or Grading Contractor. The qualified Archaeologist shall attend any
grading related Precon Meetings to make comments and/or suggestions
conceming the Archaeological Monitoring program with the Constmcfion
Manager and/or Grading Contractor.
2. Identify Areas to be Monitored
a. At the Precon Meeting, the Archaeologist shall submit to ECO/P a copy ofthe
site/grading plan (reduced to 11x17) that identifies areas to be monitored as well
as areas that may require delineafion of grading limits.
During Construction
1. Monitor Shall be Present During Grading/Excavation
a. The qualified Archaeologist shall be present full-time during grading/excavation
of native soils and shall document activity via the Consultant Monitor Record.
This record shall be sent to the ECO/P, as appropriate, each month.
2. Monitoring
a. Trenches will include staging areas and all pit and micro tunneling pit areas,
access areas and all appurtenances. Monitoring of trenches is required for the
staging areas and all pit and micro tunneling pit areas, access areas and all
appurtenances, services and all other appurtenances that ,impact native soils as
detailed on the plans or in the contract documents identified by drawing number
or plan file number. It is the Constmcfion Manager's responsibility to keep the
monitors up-to-date with current plans.
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3. Discoveries ,
a. Discovery Process
In the event of a discovery, and when requested by the Archaeologist, or the
Principal Invesfigator (PI) if the Monitor is not qualified as a PI, the Constmction
Manager (CM), as appropriate, shall be contacted and shall divert, direct or
temporarily halt ground disturbing activities in the area of discovery to allow for
preliminary evaluation of potentially significant archaeological resources. The PI
shall also.immediately nofify ECO/P of such findings at the time of discovery.
b. Determinafion of Significance
The significance of the discovered resources shall be determined by the PI. For
significant archaeological resources, a Research Design and Data Recovery
Program shall be prepared, approved by the agency and carried out to mitigate
impacts before ground-disturbing acfivifies in the area of discovery will be
allowed to resume.
c. Minor Discovery Process for Pipeline Projects
For all projects: The following is a summary of the criteria and procedures related
to the evaluation of smaU cultural resource deposits during excavation for
pipelines.
(1) Coordinafion and Nofification
(a) Archaeological Monitor shall notify PI, CM and ECO/P, as
appropriate.
(2) Criteria used to Determine if it is a Small Cultural Resource Deposit
(a) The deposit is limited in size both in length and depth; and,
(b) The information value is limited and is not associated with any other
resources; and,
(c) There are no unique features/artifacts associated with the deposit.
(d) A preliminary description and photographs, if available, shall be
transmitted to ECO/P.
(e) ECO will forward the informafion to Planning for consultation and
verification that it is a small historic deposit.
(3) Procedures for documentafion, curation and reporting the following
constitutes adequate mitigation of a small historic deposit to reduce impacts
due to excavafion acfivities to below a level of significance.
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(a) 100% of the artifacts within the trench alignment and width shall be
documented in-situ, to include photographic records, plan view of the
trench and profiles of sidewalls, recovered, photographed after
cleaning, and analyzed and curated.
(b) The remainder of the deposit within the limits of excavation (trench
walls) shall be left intact.
(c) The Final Results Report shall include a requirement for monitoring of
any future work in the vicinity.
4. Human Remains
If human remains are discovered, work shall halt in that area and procedures set forth
in the Califomia Public Resources Code (Sec. 5097.98) and State Health and Safety
Code (Sec. 7050.5) shall be followed as follows:
a. Notification
(1) Archaeological Monitor shall notify the PI, CM and ECO/P.
(2) The PI shall notify the County Coroner after consultation.
b. Stop work and isolate discovery site
(f) CM/ECO/P, as appropriate, shall stop work immediately in the location of
the discovery and any nearby area reasonably suspected to overiay adjacent
human remains until a determination can be made by the County Coroner in
consultation with the PI conceming the origin of the remains and the cause
of death.
(2) The County Coroner, in consultation with the PI, shall determine the need
for a field invesfigation to examine the remains and establish a cause of
death.
(3) If a field investigation is not warranted, the PI, in consultation with the
County Coroner, shall determine if the remains are of Native American
origin.
c. If Human Remains are Native American
(1) The Coroner shall notify the Native American Heritage Commission
(NAHC). (By law, ONLY the Coroner can make this call.)
(2) NAHC will identify the person or persons it believes to be the Most Likely
Descendent (MLD).
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(3) The MLD may make recommendations to the landowner or PI responsible
for the excavation work to determine the treatment, with appropriate dignity,
ofthe human remains and any associated grave goods (PRC 5097.98).
d. IfHuman Remains are not Native American
(1) The PI shall contact the NAHC and notify them ofthe historical
context of the burial. -
(2) NAHC will identify the person or persons it believes to be the MLD.
(3) The MLD may make recommendations to the landowner or PI responsible
for the excavation work to determine the treatment of the human remains
(PRC 5097.98).
(4) If the remains are of historic origin, they shall be appropriately removed and
conveyed to the coroner, specialist, or Museum of Man for analysis. The
decision for reinterment of human remains shall be made in consultation
with ECO/P, the landowner, PI, and the NAHC/MLD.
e. Disposition of Human Remains
The landowner, or his authorized representative, shall reinter the Native American
human remains and any associated grave goods, with appropriate dignity, on the
property in a location not subject to further subsurface disturbance, IF:
(1) The NAHC is unable to identify the MLD, or the MLD failed to make a
recommendation within 24 hours after being notified by the Commission;
or;
(2) The landowner or authorized representative rejects the recommendation of
the MLD and mediation in accordance with PRC 5097.94 (k) by the NAHC
fails to provide measures acceptable to the landowner.
5. Notificafion of Complefion
The Archaeologist shall notify the ECO/P, in writing ofthe end date of monitoring.
Post Construction
1. Handling and Curation of Artifacts and Letter of Acceptance
a. The Archaeologist shall be responsible for ensuring that all cultural remains
collected are cleaned, catalogued, and permanently curated with an appropriate
institution; that a letter of acceptance from the curation institution has been
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submitted to the Planning Department; that all artifacts are analyzed to identify
function and chronology as they relate to the history of the area; that faunal
material is identified as to species; and that specialty studies are completed, as
appropriate.
b. Curation of artifacts associated with the survey, testing and/or data recovery for
this project shall be completed in consultation with ECO/P and the Native
American representative, as applicable.
2. Final Results Reports (Monitoring and Research Design and Data Recovery Program)
a. Within three months following the complefion of monitoring, two copies of the
Final Results Report (even if negative) and/or evaluation report, if applicable,
which describes the results, analysis, and conclusions of the Archaeological
Monitoring Program (with appropriate graphics) shall be submitted to ECO/P for
approval.
b. For significant archaeological resources encountered during monitoring, the
Research Design and results of the Data Recovery Program shall be included as
part of the Final Results Report.
3. Recording Sites with State of Califomia Department of Park and Recreafion
The Archaeologist shall be responsible for recording (on the appropriate State of
Califomia Department of Park and Recreation forms-DPR 523 A/B) any significant
or potentially significant resources encountered during the Archaeological Monitoring
Program in accordance with the City's Historical Resources Guidelines, and submittal
of such forms to the South Coastal Informafion Center with the Final Results Report.
c Directly or indirectly destroy a unique paleontological resource or site or unique
geologic feature?
Potentially Significant Impact Unless Mitigation Incorporated The possibility exists of
encountering unknown paleontological resources within the study area. The project
corridor may contain Baypoint and Sanfiago formations. The Baypoint formation is a
potentially sensitive paleontological resource. The Santiago formation may be a
moderately sensitive paleontological resource (personal communication, Hugh Wagner,
Collections Manager, Department of Paleontology, San Diego Museum of Natural
History, April 1999).
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d. Disturb any human remains, including those interred outside of formal cemeteries?
Potentially Significant Impact Unless Mitigation Incorporated The record search
conducted at the South Coastal Information Center, San Diego State University identified
one previously recorded site (CA-SDI-13701) within the project area. The field survey
relocated previously recorded site CA-SDI-13701 and idenfified one previously
unrecorded site (NAHI-S- l): The presence or absence of human remains has not been
determined for these sites. Potentially significant impacts to human remains due to
project constmction would be mitigated to less than significant by implementing
mifigation measure CULT-1 as described under Item (a) above.
VI. GEOLOGY AND SOILS - Would The Project:
a. Expose people or structures to potential substantial adverse effects, including risk of
loss, injury or death involving:
(i) Rupture of a known earthquake fault, as delineated on the most recent Alquist-
Priolo Earthquake Fauh Zoning Map issued by the State Geologist for the area
or based on other substantial evidence of a known fault? Refer to Division of
Mines and Geology Special Publication 42.
No Impact A Geotechnical Investigation Report was prepared in 2003 for the
NAHI westem segment (Terra Costa Consulting Group Inc., 2003). According to
the report, the Proposed Project is not located within any Earthquake Fault Zone
delineated by the State of Califomia for the hazard of fault surface mpture. A
small fault segment has been mapped within the study area but is not considered
to be potentially active.
(ii) Strong seismic ground shaking?
Potentially Significant Impact Unless Mitigation Incorporated Southem
Califomia, including the Proposed Project site is located in a seismically active
area. The closest known active fault to the project site is the Rose Canyon fault
zone, which is located approximately 5.3 miles to the west ofthe site. This fault
could result in an earthquake movement with a magnittide of 6.9. An earthquake
of this magnitude has the possibility of causing damage/mpture of underground
pipelines. Potentially significant ground shaking impacts would be mitigated to
less than significant by implementing the following mitigation measures:
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' GEO-1 All proposed facilities shall be designed and built in accordance with the
seismic design provisions of the 1997 Uniform Building Code or the
2001 Califomia Building Code. Additionally, all facets of excavation,
constmction, and facility design shall meet the standards established
during final engineering design. Specifically, this shall include
measures such as the over-excavation of unsuitable base soils and
geologic units, the proper composition, placement, and compacfion of all
constmction fill, the use of addifional foundation design techniques as
necessary, and the utilization of appropriate constmction materials and
methods.
GEO-2 During final design, the City shall perfonn design-level geotechnical
investigations to evaluate the potential for liquefaction and seismic
instability to affect the approved project and all associated facilities.
Where these hazards are found to exist, appropriate engineering design
and constmction measures shall be incorporated into the project design.
Appropriate measures could include ground improvement of liquefiable
zones.
GEO-3 Design and constmction shall be implemented under the direct
supervision of a geotechnical engineer or engineering geologist as
prescribed by the Califomia Board of Consumer Affairs. These
professionals shall be licensed in Califomia by the Cahfomia Board of
Consumer Affairs.
(iii) Seismic-related ground failure, including liquefaction?
Potentially Significant Impact Unless Mitigation Incorporated Areas
susceptible to liquefacfion include areas with loose to medium dense, sandy soils
that have become saturated. The proposed site is located within an area generally
underiain by alluvial deposits and groundwater levels are relatively shallow.
Therefore the likelihood of liquefaction to occur as a result of a seismic event is
considered moderate to high (TCG, 2003). Potentially significant impacts due to
seismic-related ground failure, including liquefaction would be mitigated to less
than significant by implementing mitigafion measures GEO-1 through GEO-3
described above.
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(iv) Landslides?
No Impact Landslide hazard areas are generally considered to exist when
substantial slopes are located on or immediately adjacent to a subject property.
The Proposed Project is located within the low-lying area associated with Agua
Hedionda Lagoon, and is not in a potenfial landslide area as depicted in the
SanGis Natural Features Map (www.sangis.org, accessed March 2003).
Considering the relatively level terrain of the area proposed for the realignment of
the westem segment of the NAHI, it is not anticipated that landslide hazards
would impact the Proposed Project.
Resuh in substantial soil erosion or the loss of topsoil?
Potentially Significant Impact Unless Mitigation Incorporated. Project constmction is
expected to last approximately four months and would be conducted between September
and December in order to avoid impacts to potentially-occurring sensitive bird species.
Due to the seasonal restrictions associated with the potenfially-occurring sensitive bird
species near the project corridor, trenching and micro-tunneling acfivifies may take place
during the rainy season and soil erosion may potenfially occur. As a result of staging
area preparation, trenching and micro-ttinneling during project constmction, potential
erosion and siltation impacts could occur. Standard BMPs would be employed during
constmction, such as installation of sediment barriers and gravel/sand bags to prevent
offsite sedimentafion; dust abatement to minimize ftagitive dust; and removal of soil
tracked onto paved surfaces. Potentially significant erosion impacts would be mitigated
to less than significant by implementation of the following mifigafion measures:
GEO-4 All trenching, micro-tunneling and site preparation shall be performed under the
observation of a geotechnical engineer and in accordance with the City's
Grading Ordinance, Standard Specification for Public Works, and the 1997
Regional Supplemental Amendments.
GEO-5 All unconsolidated and loose soils shall be excavated to competent soils or
formational soil and benched, as required by the City's grading ordinance.
Stmctural fill soils shall be compacted to a minimum 90 percent of the
maximum dry density, as determined by ASTM Test Method D 1557-91.
Moisture content in the fill shall be maintained between the optimum moisture
content and three percent over optifnum.
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c. Be located on geologic unit or solid that is unstable, or that would become unstable as
a result of the project, and potentially result in on- or offsite landslide, lateral
spreading, subsidence, liquefaction or collapse?
Potentially Significant Impact Unless Mitigation Incorporated See response Vl-a, iii.
During trenching and micro-tunneling, caving during excavafion could occur. Impacts
associated with caving during excavafion activities would be mitigated to less than
significant by implementing the following mitigation measures:
GEO-6 All trenching and micro-tunneling activities shalL comply with OSHA and
CALOSHA requirements. Excavated areas shall be shored or sloped back for
stability. Trench shields may be used in place of shoring or sloping the
excavation, provided that OSHA and CALOSHA requirements are followed.
Any shoring designs shall be reviewed by the geotechnical engineer or other
qualified personnel. Excavation conditions shall be checked in the field and
adjusted as necessary.
d Be located on expansive soil, as defined in Table 18-1-B of the Uniform Building Code
(1994), creating substantial risks to life or property?
Potentially Significant Impact Unless Mitigation Incorporated. See response V1 a.ii and
Vlb.
e. Have soils incapable of adequately supporting the use of septic tanks or alternative
wastewater disposal systems where sewers are not available for the disposal of
wastewater?
No Impact Implementation of the Proposed Project would not result in any need for a
septic tank or altemative wastewater disposal system.
VII. HAZARDS AND HAZARDOUS MATERIALS - Would the project:
a. Create a significant hazard to the public or the environment through the routine
transport, use or disposal of hazardous materials?
Less Than Significant Impact Relatively small amounts of hazardous substances, such
as fossil fuels, lubricants, and solvents would be used onsite for constmction and
maintenance of the project. These materials shall be transported and handled in
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accordance with all federal, state, and local laws regulating the management and use of
hazardous materials. Consequenfiy, use of these materials for their intended purpose
would not pose a significant risk to the public or environment, and impacts would be less
than significant.
b. Create a significant hazard to the public or the environment through reasonably
foreseeable upset and accident conditions involving the release of hazardous materials
into the environment?
Less Than Significant Impact See response Vll-a. '
c Would the project emit hazardous emissions or handle hazardous or acutely hazardous
materials, substances or waste within one quarter mile of an existing or proposed
school?
No Impact See response Vll-a. The Proposed Project would not be located within one-
quarter mile of an existing or proposed school (City of Carisbad 2002). As such, no
impact to existing or proposed schools would result.
d. Be located on a site which is included on a list of hazardous materials sites compiled
pursuant to Government Code Section 65962.5 and, as a result, would it create a
significant hazard to the public or the environment?
No Impact The project site is not included on a list of hazardous materials sites
compiled pursuant to Govemment Code Section 65962.5 (NAHI FEIR, October 2004).
e. For a project located within an airport land use plan or, where such a plan has not
been adopted, within two miles of a public airport or public use airport, would the
project result in a safety hazard for people residing or working in the project area?
No Impact The project is not located within an airport land use plan or within two miles
of a public airport or public use airport.
/ For a project within the vicinity of a private airstrip, would the project result in a safety
hazard for people residing or working in the project area?
No Impact The project is not located within the vicinity of a private airstrip.
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g. Impair implementation of, or physically interfere with, an adopted emergency response
plan or emergency evacuation plan?
No Impact The project corridor is not located within an established access route and
therefore, project implementation would not impair or interfere with an emergency
response plan or evacuafion plan.
h. Expose people or structures to a significant risk of loss, injury or death involving
wildlands fires, including where wildlands are adjacent to urbanized areas or where
residences are intermixed with wildlands?
No Impact The constmction of this project would involve underground facilities to
transport wastewater; therefore, no impact to people or stmctures involving wildland fire
would occur.
VIII. HYDROLOGY AND WATER QUALITY - Would the project:
a. Violate any water quality standards or waste discharge requirements?
Potentially Significant Impact Unless Mitigation Incorporated Exposed soils from
excavation boring and trenching activities could erode and be transported to nearby water
resources. Sedirnentation to drainages in the project area could have adverse effects on
water quality. Additionally, accidental spills or disposal of potentially harmfijl materials
used during constmction could wash into and pollute surface waters or groundwater.
These potential impacts would be short-term (during the constmction phase) and would
be mitigated to less than significant by implementing the following mitigation measures:
HYDRO-1 Short-term water quality impacts during constmction shall be minimized by
complying with federal and state regulations for groundwater discharge into
surface water bodies. All discharges shall be in compliance with RWQCB
requirements. If dewatering activities associated with trenching, boring and
excavation result in possible exposure to contaminated groundwater and/or
soils, the City shall ensure compliance with the State of Califomia CCR
Title 24 Health and Safety Regulations as managed by the San Diego
County Department of Environmental Health. Additionally, the City shall
ensure compliance with the Clean Water Act and National Pollutant
Discharge Elimination System (NPDES) regulations regarding water
discharge from construction activities to surface waters.
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HYDRO-2 The constmction contractor shall be required to implement Best
Management Practices (BMPs) during constmction in accordance with the
\ plans and specifications prepared for the project, the General Constmction
Storm Water Permit (NPDES Order 99-08-DWQ), and to the satisfaction of
the City Engineer. These BMPs shall address temporary soils stabilization,
temporary sediment control, wind erosion control, tracking control, and non-
stormwater management.
HYDRO-3 All equipment and vehicles required for constmction, maintenance and
operafion shall be refueled or maintained within paved roadways or
designated staging areas. All stationary equipment, such as motors or
generators, shall be stored on the exisfing access road, drip pans shall be
placed under all potenfial discharge conduits or leaks. All connecfions and
fitfings of hoses shall be periodically checked for leaks.
HYDRO-4 All project related spills of hazardous materials shall be reported to the
appropriate enfities, including the USFWS, CDFG, RWQCB, and shall be
cleaned up immediately. Contaminated soils shall be removed to approved
disposal areas.
Substantially deplete groundwater supplies or interfere substantially with groundwater
recharge such that there would be a net defick in aquifer volume or a lowering ofthe
local groundwater table level (e.g., the projection rate of pre-existing nearby wells
would drop to a level which would not support existing land uses or planned uses for
which permits have been granted?
Less Than Significant Impact Constmction of the Proposed Project is expected to
include trenching and excavafion and micro-tunneling techniques. As part of the
constmcfion methods ufilized, dewatering of the open trench and tunnel sections may be
required. Changes in the groundwater existing conditions related to altered direction, rate
of flow, or quality, are considered less than significant as dewatering impacts are
localized and will occur for a short-term only during constmction. Furthermore, the
project would not change the regional groundwater absorption rates as the increase in
impervious surface area associated with the access holes would be negligible when
compared to the existing condition and therefore would be considered less than
significant.
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c. Substantially alter the existing drainage pattern of the site or area, including through
the alteration of the course of a steam or river, in a manner which would resuh in
substantial erosion or siltation on- or offsite?
Less Than Significant Impact Stormwater currently sheet flows into the Agua Hedionda
Lagoon. The project would not alter the course of a stream or river. The Proposed Project
involves the addition of new below ground stmctures. No changes to absorption rates,
drainage patterns or storm mnoff would occur due to the proposed project. The
constmction of access holes would increase the amount of mnoff However, the increase
in impervious surface area associated with the new access holes would be negligible
when compared to the existing condition and therefore would have a less than significant
impact to the existing drainage pattem of the site.
d. Substantially alter the existing drainage pattern of the site or area, including through
the alteration of the course of a stream or river, or substantially increase the rate or
amount of surface runoff in a manner which would resuh in flooding on- or offsite?
Less Than Significant Impact As discussed in responses Vlll-a and -c, project
implementation would not substanfially alter the exisfing drainage pattems onsite or
within the vicinity of the project corridor such that the rate or amount of surface mnoff
would increase in a manner that would result in flooding on or offsite.
e. Create or contribute runoff water which would exceed the capacity of existing or
planned stormwater drainage systems or provide substantial additional sources of
polluted runoff?
Less Than Significant Impact Upon project completion, the surface mnoff would
continue to enter Agua Hedionda Lagoon. As discussed in response Vlll-d, the Proposed
Project would not contribute mnoff which would exceed the capacity of any existing or
planned stormwater drainage systems or provide substantial sources of polluted mnoff
/ Otherwise substantially degrade water quality?
Potentially Significant Impact Unless Mitigation Incorporated As described in
response Vlll-a, there is a potential for mnoff and sedimentation transport to occur during
constmction. Implementation of mitigation measures HYDRO-1 through HYDRO-4
would reduce this impact to less than significant.
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g. Place housing within a 100-year flood hazard area as mapped on a federal flood
Hazard Boundary or Flood Insurance Rate Map or other flood hazard delineation
map?
No Impact The Proposed Project is limited to the realignment of the NAHI westem
segment and does not include the development of housing.
h. Place within a 100-year flood hazard area structures which would impede or redirect
flood flows?
Less Than Signiflcant Impact The Proposed Project is located in the 100-year flood
plain, as defined by FEMA. The Proposed Project involves re-alignment and
constmction of a portion of the NAHI. It is unlikely that the project components
occurring within the 100-year floodplain would impede or redirect flow because the new
pipeline would be placed underground and the new access holes would be placed
relatively flush with existing contours. Therefore, impacts associated with placement of
stmctures in a 100-year floodplain are considered less than significant.
i. Expose people or structures to a signiflcant risk or loss, injury or death involving
flooding, including fiooding as a resuh of the failure of a levee or dam?
No Impact See responses Vlll-g and-h.
/. Result in inundation by seiche, tsunami or mudflow?
Less Than Significant Impact The threat to the NAHI westem segment due to seiche or
tsunamis remains the same regardless whether the westem segment of the NAHI is re-
aligned as proposed or not. The NAHI westem segment is located less than one mile
from the Pacific Ocean. The presence of this large body of water coupled by Carisbad's
location within seismically active southem Califomia exposes the project site to seiche
and tsunami hazards. While the project site is not located within an earthquake hazard
zone as designated on Alquist-Priolio Maps, seismic activity can still impact this area of
the Pacific Coast. That said, the frequency of such events occurring is very low,
therefore impacts associated with potential project site inundation by seiche or tsunami is
considered less than significant.
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IX. LAND USE AND PLANNING - Would the project:
a. Physically divide an established community?
No Impact The Proposed Project would be located underground in the vicinity of the
Agua Hedionda Lagoon and would not limit public access to the lagoon or shoreline, or
divide an established community.
b. Confiict with any applicable land use plan, policy or regulation of an agency with
jurisdiction over the project (including, but not limited to the general plan, specific
plan, local coastal program or zoning ordinance) adopted for the purpose of avoiding
or mitigating an environmental effect?
Less Than Significant Impact The project site is designated as low to medium density
residential, high density residential, travel/recreation commercial and open space by the
City of Carisbad General Plan and Zoning Map. These designations include public
utilities as an allowable use and therefore would not conflict with the City's General Plan
or Zoning Ordinance. Additionally, to ensure that potential conflicts with the local
coastal program would be less than significant, the proposed project has been designed to
relocate the existing NAHI ftirther inland and to avoid impacts to wefiands and ESHA.
c. Confiict with any applicable habitat conservation plan or natural community
conservation plan?
Less Than Significant Impact. See response W-c.
X. MINERAL RESOURCES - Would the project:
a. Result in the loss of availability of a locally-important mineral resource recovery site
delineated on a local general plan, specific plan or other land use plan?
No Impact No mineral resources considered to be of value to the future of the region or
state occur onsite, therefore no impact would occur.
XI. NOISE - Would the project:
a. Exposure of persons to or generation of noise levels in excess of standards established
in the local general plan or noise ordinance, or applicable standards of other agencies?
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Less Than Significant Impact Constmction of the Proposed Project would take
approximately 4 months and would be limited to the City of Carlsbad's allowable
constmction hours and days (i.e., 7:30 a.m. to 5:30 p.m. Monday through Friday).
Noise generated by constmction equipment would occur with varying intensities and
durations during the various phases of constmction. Noise impacts associated with
tunneling operations are similar to cut-and-cover pipeline constmction. However, rather
than the constmction noise progressing lineariy, the noise would be confined at the tunnel
access locations {see Figure 2-3). Thus,.noise impacts could last for several weeks rather,
than a few days at the area adjacent to the access points.
Constmction equipment would include a micro-tunneling drill, delivery tmcks, dump
tmcks, a crane loader, backhoe, an engine-driven hydraulics pump, an engine-driven
generator, and forklift.
The closest sensifive receptors (site residences) are located approximately 100-200 feet
from the proposed drilling and trenching constmction areas. At this distance the
-maximum noise level would be approximately 80 dB or less.
Due to the short-term duration of the constmcfion activities, and because the constmction
activities would occur during the City's allowable time periods, this noise level would
result in a less significant noise impact.
b. Exposure of persons to or generation of excessive groundborne vibration or
groundborne noise levels?
Less Than Significant Impact. See response Xl-a.
c A substantial permanent increase in ambient noise levels in the project vicinity above
levels existing without the project?
No Impact The ambient noise levels of the project vicinity would not be permanently
impacted: up to four maintenance vehicle trips per year are anticipated.
d. A substantial temporary or periodic increase in ambient noise levels in the project
vicinity above levels existing without the project?
Less Than Significant Impact Sensitive receptors, including adjacent private
residences, recreational users of the lagoon and visitors to the Carlsbad Boat Club dock
area could potentially be impacted by constmction noise and maintenance vehicle noise.
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b.
However, as described in response Xl-a, the project will comply with the City's Noise
Ordinance. Future maintenance and operation acfivities will not generate significant
traffic (approximately one trip per week), and no substantial temporary or periodic
increase in ambient noise levels are anticipated.
For a project located within an airport land use plan or, where such a plan has not
been adopted, within two miles of a public airport or public use airport, would the
project expose people residing or working in the project area to excessive noise levels?
No Impact The project is located over 2 miles to the west of McClellan-Palomar
Airport. The project involves relocafing an underground sewer pipehne and would not
expose people to noise associated with the Palomar Airport. The proposed underground
pipeline will not interfere with the McClellan-Palomar Airport Comprehensive Land Use
Plan (SANDAG 1994), or pose a safety hazard due to air traffic noise to local residences
or those working in the project area.
For a project located within the vicinity of a private airstrip, would the project expose
people residing or working in the project area to excessive noise levels?
No Impact The project is not located within the vicinity of a private airstrip.
Xll. POPULATION AND HOUSING - Would the project:
a. Induce substantial population growth in an area, either directly (e.g., by proposing new
homes and business) or indirectly (e.g., through extension of roads or other
infrastructure)? . >
No Impact Although improvements to public service facilities are generally regarded as
extensions of major infrastmcture, the project as proposed would not alter the capacity of
the existing sewer line or extend service. The project has been developed in an effort to
protect the existing sewer line from erosion and provide maintenance access rather than
to expand the infrastmcUire of the City. Therefore, since no expansion of the sewer
system is proposed, the proposed project would not induce population growth.
Displace substantial numbers of existing housing, necessitating the construction of
replacement housing elsewhere?
No Impact Several private residences are located within the direct vicinity of the site.
The Proposed Project would not alter or remove these homes.
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c. Displace substantial numbers of people, necessitating the construction of replacement
housing elsewhere?
No Impact The Proposed Project would not cause any of the nearby residents to be
displaced.
Xlll. PUBLIC SERVICES - Would the project:
a. Resuh in substantial adverse physical impacts associated with the provision of new or
physically altered government facilities, need for new or physically altered government
facilities, the construction of which could cause significant environmental impacts, in
order to maintain acceptable service ratios, response times or other performance
objectives for any of the following public services:
(i) Fire protection?
Less Than Significant Impact The project would not create a long term fire
hazard, therefore the need for increased fire protection would not occur.
(ii) Police protection?
No Impact Constmcfion, maintenance, and liability of the proposed project
would be the responsibilifies of the City. The nature of the project would not
warrant police intervention; therefore an increased need of local police protection
would not occur.
(iii) Schools?
No Impact The Proposed Project would not increase the local population,
therefore a demand on nearby schools would not occur.
(iv) Parks?
No Impact The Proposed Project would not have any effect upon area parks as it
would not provide, nor result in an increased demand for parks.
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(v) Other public facilities?
Less Than Significant Impact All constmcfion, maintenance, management, and
liability of the Proposed Project would be assumed by the City.
XIV. RECREATION - Would the project:
a. Increase the use of existing neighborhood and regional parks or other recreational
facilities such that substantial physical deterioration of tlie facility would occur or be
accelerated?
No Impact Re-alignment of the NAHI would not affect the use of existing
neighborhood and regional parks or recreational facilifies. Public boating and fishing
within Agua Hedionda Lagoon would not be impacted.
b. Does the project include recreational facilities or require the construction or expansion
of recreational facilities which might have an adverse physical effect on the
environment?
No Impact The project site is privately owned property and is not associated with
recreafional facilities nor the use of such facilities.
XV. TRANSPORTATION AND TRAFFIC - Would the project:
a. Cause an increase in traffic which is substantial in relation to the existing traffic load
and capacity ofthe street system (i.e., resuh in a substantial increase in either the
number of vehicle trips, the volume to capacity ratio on roads or congestion at
intersections?
Less Than Significant Impact During project constmction, traffic will be generated.
The primary sources of constmction tt-affic would be workers, delivery of materials and
removal of excess material. A total of 20 tmck trips per day are expected to occur
throughout the four-month constmcfion period. This traffic will utilize the following
roadways: Adams Street, Tamarack, Hoover, Cove Drive and possibly 1-5. After
constmcfion, long-term traffic would not change from the exisfing condifions which
typically generates one trip per week for roufine maintenance. The Proposed Project is
not expected to cause an increase in traffic that is substantial in relation to the existing
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traffic load and capacity ofthe street system. The impacts from the Proposed Project are
less than significant.
b. Exceed, either individually or cumulatively, a level of service standard established by
the County Congestion Management Agency for designated roads or highways?
Less Than Significant Impact See response XV-a. Short-term and limited
constmction-related traffic would not create a substanfial impact on fraffic volumes nor
change traffic pattems in such a way as to affect the LOS or vehicle to congestion ratio
on stiidy area roadways. Long-term traffic associated with operafing and maintenance
would not change from the exisfing condifions and therefore would have no impact to the
LOS on study area roadways.
c. Resuh in a change in air traffic patterns, including either an increase in traffic levels
or a change in location that results in substantial safety risks?
No Impact The Proposed Project does not include components that would alter air
traffic pattems and would not conflict with the Comprehensive Land Use Plan for the
McClellan-Palomar Airport. It would not, therefore, result in a change of air traffic
pattems or result in substanfial safety risks.
d Substantially increase hazards due to a design feature (e.g., sharp curves or dangerous
intersections) or incompatible uses (e.g., farm equipment)?
No Impact The project would not involve the alteration of existing roadways nor would
it require incompatible vehicles access. Vehicles used during constmcfion would be
driven to the site and away from the site pursuant to state transportation laws. Any
equipment or vehicles not designated as adequate for public roadway travel would be
transported to the site via a trailer unit. Hence, no impacts are expected.
e. Result in inadequate emergency access?
No Impact The Proposed Project has been designed to safisfy the emergency
requirements of the Fire and Police Departments. No impact assessed.
/ Result in inadequate parking capacity?
Less Than Significant Impact All constmcfion workers (between 8 and 10) and
constmcfion vehicles and equipment would utilize proposed stalling areas (see^F/gure 2-
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3) and local area streets for parking. No additional permanent employees would be
necessary for operation of the proposed facilities. No loss of public parking would occur.
Therefore, impacts would be less than significant.
g. Confiict with adopted policies, plans or programs supporting alternative transportation
(e.g., bus turnouts, bicycle racks)?
No Impact The Proposed Project is not currently served by or not located in an area
conducive to piiblic transportafion. No impacts to adopted policies, plans or programs
• supporting altemafive transportafion are anticipated.
XVI. UTILITIES AND SERVICE SYSTEMS- Would the project:
a. Exceed wastewater treatment requirements of the applicable Regional Water Quality
ControlBoard?
No Impact The Proposed Project would not result in addifional demands for wastewater
treatment.
b. Require or resuh in the construction of new water or wastewater treatment facilities or
expansion of existing facilities, the construction of which could cause significant
environmental effects?
No Impact As discussed in Response Xll-a, the Proposed Project would not generate
population growth; and no additional wastewater treatment or water production capacity
is proposed as part of the project. Therefore, no new demand on water or wastewater
facilities would occur.
c. Require or resuh in the construction of new storm water drainage facilities or
expansion of existing facilities, the construction of which could cause significant
environmental effects?
No Impact No planned expansion of, or constmction of new storm water drainage
facilifies or expansion of existing storm water drainage facilifies is planned or required as
part of the Proposed Project. See Response Vll-d.
d. Have sufficient water supplies available to serve the project from existing entitlements
and resources, or are new or expanded entitlements needed?
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No Impact The Proposed Project would relocate an existing sewer line and therefore
would not require water supply services.
e. Resuh in determination by the wastewater treatment provider which serves or may
serve the project that it has adequate capacity to serve the project's projected demand
in addition to the provider's existing commitments?
No Impact As discussed in Response XVI-b, the Proposed Project would not require
wastewater treatment services. ,
/ Be served by a landfill with sufficient permitted capacity to accommodate the project's
solid waste disposal needs?
Less Than Significant Impact Solid waste disposal is provided by Waste Management,
Inc., which operates under a franchise agreement with the City. The project would
generate a limited amount of solid waste during constmcfion. It is anficipated that the
solid waste generated by project constmction would not be substantial or interfere with
the permitted capacity of nearby landfills and therefore would have a less than significant
impact on local solid waste facilifies. No demand for regular solid waste disposal woiild
be generated by or is proposed as part of project operations.
g. Comply with federal, state and local statutes and regulations related to solid waste?
No Impact Disposal of solid waste generated during project constmcfion would be
disposed of in a manner consistent with federal, state and. local statutes and regulafions.
After constmction, the project would not generate a demand for solid waste material
recovery or disposal.
XVll. MANDATORY FINDINGS OF SIGNIFICANCE
a. Does the project have the potential to degrade the quality of the environment,
substantially reduce the habitat of a fish or wildlife species, cause a fish or wildlife
population to drop below self-sustaining levels, threaten to eliminate a plant or animal
community, reduce the number or restrict the range of rare or endangered plants or
animals, or eliminate important examples of the major periods of California history or
prehistory?
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Potentially Significant Impact Unless Mitigation Incorporated. Based on evaluation
and discussions contained in this Initial Study, the Proposed Project would not
significanfiy affect the environment with the recommended mitigation measures
incorporated into the project, particulariy for the topics of biological resources (see
Secfion IV responses IV-a through IV-f) and cultural resources (Section V responses V-a
through V-d) as analyzed herein.
b. Does the project have impacts that are individually limited, but cumulatively
considerable? ("Cumulatively considerable" means that the incremental effects of a
project are considerable when viewed in connection with the effect of past projects, the
effects of other current projects, and the effects ofprobable future projects.)
Potentially Significant Impact Unless Mitigation Incorporated Mitigation measures
are provided to reduce the project's impacts, to biological resources, cultural resources,
geology/soils, and hydrology and water quality to a level that would be less than
significant and not cumulatively considerable. With the incorporation of the project
mitigation measures identified in this Initial Study, project-level impacts to the
environment would be reduced to less than significant levels, and impacts would not be
cumulafively considerable when viewed in connecfion with the effects of reasonably
foreseeable projects.
c. Does the project have environmental effects which will cause substantial adverse
effects on human beings, either directly or indirectly?
Less Than Significant Impact Based on the analysis of all the above questions, it has
been determined that there would be no significant direct or indirect effect on human
beings.
XVlll. EARLIER ANALYSIS USED AND SUPPORTING INFORMATION SOURCES
The following documents were used in the analysis of this project and are on file in the City of
Carisbad Planning Department located at 1635 Faraday Avenue, Carisbad, Califomia,
92008.
Final Environmental Impact Report for the City of Carisbad North Agua Hedionda Interceptor
Westem Segment Sewer Maintenance, Access Roads Shoreline Protection Project (SCH
No.2003051076). City of Carisbad Planning Department. October 2004.
McClellan-Palomar Airport Comprehensive Land Use Plan. San Diego Associafion of
Govemment (SANDAG). Amended October 4, 2004.
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Califomia, State of Department of Conservation, Division of Mines and Geology. 1996. Tan,
S.S., and Kennedy, M.P. Geologic Maps of the Northwestem part of San Diego County,
Califomia. DMG Open-File Report 96-02, pis. 1-2 (map sheets, 1:24,000).
Preliminary Geotechnical Engineering Invesfigafion Report. North Agua Hedionda Interceptor
Access Roads Shoreline Protection - TerraCosta Consulfing Group. July 2003.
SanDiegoCountyFloodplain. SANGIS. June 1997.
San Diego County Important Farmland 1998. Sheet 1 of 2. State of Califomia, Department of
Conservafion, Division of Land Resource Protecfion Farmland Mapping and Monitoring
Program.
Update of Mineral Land Classificafion: Aggregate Materials in the Westem San Diego County
Production - Consumpfion Region. DMG Open File Report 96-04. State of Califomia,
Department of Conservafion, Division of Mines and Geology. 1996.
Zoning Map. City of Carisbad GIS. July 25, 2006..
Gallegos & Associates. Cultural Resource Survey for the North Aqua Hedionda Interceptor
Sewer Project. Febmary 2007.
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LIST OF MITIGATION MEASURES
Biological Resources
Mitigation Measures for Sensitive Wildlife Species
BIO - 1 The City constmcfion contractor shall avoid constmcfion acfivifies outside of
the Febraary 15 through August 31 bird breeding season; or
• A qualified biologist shall conduct a focused survey for bird nests 500 feet
from constmction activities not more than 72 hours prior to
commencement of constmcfion. If acfive nests are found, noise levels at
or below 60 dBA Leq shall be maintained anywhere within 300 feet of
occupied nest locations of sensitive species. The maintenance of
acceptable noise levels shall be confirmed through noise measurements at
acfive nest locafions during peak constmcfion acfivity by a qualified
acoustician.
Project Design Feature B-1: Constmction plans for staging Area B shall note that all
direct impacts to coastal sage scmb (including disturbed forms) shall be avoided
during constmction through the placement of temporary fencing and monitoring
by a qualified biologist.
Cultural Resources
CULT-I Testing to Determine Site Significance and Monitoring of all earthmoving
acfivifies shall occur to the safisfacfion of the City of Carisbad Planning
Departinent. Tesfing and Archaeological Monitoring shall consist of the
following measures:
• Tesfing. Prior to ground disttirbance acfivities, a qualified archaeologist
approved by the City of Carlsbad shall test those sites that have not yet
been tested so that a determinafion of significance can be made. If the
resource is determined to be significant, then impacts shall be mitigated
through avoidance if feasible. If avoidance is not feasible, then mifigation
of impacts through the completion of a data recovery program shall be
. required. v .
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• Data Recoverv. If site avoidance, the preferred mifigation measure, is not
feasible, then a data recovery program shall be prepared and approved by
the City of Carisbad to recover a large enough sample of cultural material
so that informafion, of importance in addressing regional research
questions will not be irretrievably lost through impacts.
• Monitoring. Provide a qualified archaeological monitor and Native
American monitor shall be provided during constmction so that buried
culttiral resources can be idenfified in the field. Upon identification, the
resource(s) shall be tested to determine significance with appropriate
mitigation measures used as identified above.
The City of Carisbad Cultural Resource Guidelines provide the following
specific measures to conduct the monitoring and evaluation program that shall
be used for cultural resources within the NAHI project area.
Prior to Preconstruction (Precon) Meeting
1. Planning Department (PD) Plan Check
a. Prior to the first Precon Meeting, the Environmental Compliance Officer/Planner
(ECO/P) of PD shall verify that the requirements for Archaeological Monitoring
and Nafive American monitoring, if applicable, have been noted on the
appropriate constmction documents.
2. Submit Letter of Qualification to ECO/P
a. Prior to the first Precon Meeting, the applicant shall provide a letter of verification
to the ECO/P stafing that a qualified Archaeologist has been retained to
implement the monitoring program.
3. Records Search Prior to Precon Meeting
a. At least thirty days prior to the Precon Meefing the qualified Archaeologist shall
verify that a records search has been completed and updated as necessary and
introduce any pertinent information conceming expectations and probabilities of
discovery during trenching and/or grading acfivifies. Verificafion includes, but is
not limited to, a copy of a confirmafion letter from South Coastal Information
Center or a letter of verification that the Archaeologist has conducted a recent
record search for the project site.
J"''^^""^ • ; ,:>'':.:V • .'. "• : , • / J ; 4775-09
NAHI Western Segment Realignment Project MND . •- 355
Sect/on 3.0
Environmental Impaa Assessment Form - Initial Study
Precon Meeting
1. Monitor Shall Attend Precon Meefings
a. Prior to beginning any work that requires monitoring, the Applicant
shall arrange a Precon Meefing that shall include the Archaeologist, Constmcfion
Manager and/or Grading Contractor. The qualified Archaeologist shall attend any
grading related Precon Meefings to make comments and/or suggestions
conceming the Archaeological. Monitoring program with the Constmcfion
Manager and/or Grading Contractor.
2. Identify Areas to be Monitored
a. At the Precon Meeting, the Archaeologist shall submit to ECO/P a copy of the
site/grading plan (reduced to 11x17) that identifies areas to be monitored as well
as areas that may require delineafion of grading limits.
During Construction
1. Monitor .Shall be Present During Grading/Excavation
a. The qualified Archaeologist shall be present full-fime during grading/excavation
of native soils and shall document acfivity via the Consultant Monitor Record.
This record shall be sent to the ECO/P, as appropriate, each month.
2. Monitoring
a. Trenches will include staging areas and all pit and micro ttinneling pit areas,
access areas and all appurtenances. Monitoring of trenches is required for the
staging areas and all pit and micro ttjnneling pit areas, access areas and all
appurtenances, services and all other appurtenances that impact nafive soils as
detailed on the plans or in the contract documents idenfified by drawing number
or plan file number. It is the Constmction Manager's responsibility to keep the
monitors up-to-date with current plans.
3. Discoveries
a. Discovery Process
In the event of a discovery, and when requested by the Archaeologist, or the
Priiicipal Investigator (PI) if the Monitor is not qualified as a PI, the Constmction
. • .r V. • • ••, -. • Z •.'4775-09 July 2007
NAHI Western Segment Realignment Project MND ,•' • " 3 56
Section 3.0
Environmental Impaa Assessment Form - Initial Study
Manager (CM), as appropriate, shall be contacted and shall divert, direct or
temporarily halt ground disturbing activities in the area of discovery to allow for
preliminary evaluation of potentially significant archaeological resources. The PI
shall also immediately notify ECQ/P of such findings at the time of discovery.
b. Determination of Significance
The significance of the discovered resources shall be detennined by the PI. For
significant archaeological resources, a Research Design and Data Recovery
Program shall be prepared, approved by the agency and carried out to mitigate
impacts before ground-disturbing acfivifies in the area of discovery will be
allowed to resume.
c. Minor Discovery Process for Pipeline Projects
For all projects: The following is a summary of the criteria and procedures related
to the evaluation of small cultural resource deposits during excavafion for
pipelines.
(1) Coordinafion and Nofificafion
(a) Archaeological Monitor shall nofify PI, CM and ECO/P, as
appropriate.
(2) Criteria used to Determine ifit is a Small Cultural Resource Deposit
(a) The deposit is limited in size both in length and depth; and,
(b) The information value is limited and is not associated with any other
resources; and,
(c) There are no unique feattires/artifacts associated with the deposit.
(d) A preliminary description and photographs, if available, shall
be transmitted to ECO/P.
(e) ECO will forward the informafion to Planning for consultation
and verification that it is a small historic deposit.
(3) Procedures for documentation, curation and reporting the following
constitutes adequate mifigafion of a small historic deposit to reduce impacts
due to excavation acfivifies to below a level of significance. ^
(a) 100% of the artifacts within the trench alignment and width shall be
documented in-situ, to include photographic records, plan view of the
trench and profiles of sidewalls, recovered, photographed after
cleaning, and analyzed and curated.
(b) The remainder of the deposit within the limits of excavafion (trench
walls) shall be left intact.
July2007 - ; _ , ..: , • : , . . • / 4775.09
NAHI VVestern Segment Realignment Project MND ,./ ' V ' . 3.57
I
I , Sect/on 3.0
Environmental Impact Assessment Form - Initial Study
(c) The Final Results Report shall include a requirement for monitoring of
aiiy future work in the vicinity.^ ; --
4. Human Remains
, If human remains are discovered, work shall halt in that-area and procedures
set forth in the Califomia Public Resources Code (Sec. 5097.98) and State
Health and Safety Code (Sec. 7050.5) sball be followed as follows; :
• ;, ~ ,.: a. Nofificafion ''vV'. ZZZ ZriZZ . . '-".:Z - Z ' " • •
(1) Archaeological Monitor 'shall nofify the PI, CM and ECO/P. ;
(2) The PI shall nofify the County Coroner after consultation.
b. Stop work and isolate discovery site
(1) CM/ECO/P, as appropriate, shall stop work immediately in the location of
the discovery and any nearby area reasonably suspected to overiay adjacent
human remains until a determinafion can be made by the County Coroner in
consultation with the PI concerning the origin ofthe remains and the cause
of death.
(2) The County Coroner, in consultation with the PI, shall detennine the need
for a field investigation to examine the remains and establish a cause of
death.
(3) If a field investigation is not warranted, the PI, in consultafion with the
County Coroner, shair determine, if the remains. are of Native American
origin.
c. If Human Remains are Native American
(1) The Coroner shall notify the Nafive American Heritage Commission
(NAHC). (By law, ONLY the Coroner can make this call.)
(2) NAHC will identify the person or persons it believes to be the Most Likely
Descendent (MLD).
(3) The MLD may make recommendafions to the landowner or PI responsible
for the excavation work to determine the treatment, with appropriate
dignity, of the human remains and any associated grave goods (PRC
5097.98). , .'
d. If Human Remains are not Nafive American
(1) The PI shaft contact the NAHC and nofify them ofthe historical
. context of the burial. ' ;
•July.2007 ..--i^.; v -. , '''/^Z-Z''"ZZZ'. Z/-'" '':Z'.'X • : ' \ .••'•.•v.:'' -v' • 'V-':;4775-09'
. NAHI Western SegmentRealignrneht Project MND-V • " '• ' ,. , ' -V '..•/.' , • 3.58
Sect/on 3.0
Environmental Impact Assessment Form - Initial Study
(2) NAHC will identify the person or persons it believes to be the MLD.
(3) The MLD may make recommendations to the landowner or PI responsible
for the excavation work to determine the treafmeiit ofthe human remains
(PRC 5097.98).
(4) If the remains are of historic origin, they shall be appropriately removed
and conveyed to the coroner, specialist, or Museum of Man for analysis.
The decision for reinterment of human remains shall be made in
consultation with ECO/P, the landowner, PI, and the NAHC/MLD.
e. Disposition of Hufnan Remains
The landowner, or his authorized representative, shall reinter the Native
American human remains and any associated grave goods, with appropriate
dignity, on the property in a locafion not subject to further subsurface
disturbance, IF:
(1) The NAHC is unable to identify the MLD, or the MLD failed to make a
recommendafion within 24 hours after being notified by the Commission;
or;
(2) The landowner or authorized representafive rejects the recommendation of
the MLD and mediafion in accordance with PRC 5097.94 (k) by the NAHC
fails to provide measures acceptable to the landowner.
5. Notificafion of Completion
The Archaeologist shall notify the ECO/P, in writing of the end date of monitoring.
Post Construction
1. Handling and Curation of Artifacts and Letter of Acceptance
a. The Archaeologist shall be responsible for ensuring that all cultural remains
collected are cleaned, catalogued, and permanently curated with an appropriate
institution; that a letter of acceptance from the curation institution has been
submitted to the Planning Department; that all artifacts are analyzed to identify
ftinction and chronology as they relate to the history of the area; that faunal
material is identified as to species; and that specialty studies are completed, as
appropriate.
juiy2oo7:, :, , ; . - 4775-09
NAHI Western Segment-Realignment Project MND • 3.59
Section 3.0
Erivironmentai Impaa Assessment Form - Initial Study
h. Curafion of artifacts associated with the survey, testing and/or data recovery for
this project shall be completed in consultation with ECO/P and the Native
American representafive, as applicable.
2. Final Results Reports ^(Monitoring and Research Design and Data Recovery
Program)
a. Within three months following the complefion of monitoring, two copies of the
Final Results-Report (even if negafive) and/or evaluation report, if applicable,
• which describes the results, analysis, ;and conclusions of the Archaeological
Monitoring Program (with appropriate graphics) shallbe submitted to ECO/P for
approval.
b. For significant archaeological resources encountered during monitoring, the
Research Design and results of the Data Recovery Program shall be included as
part of the Final Results Report.
3. Recording Sites with State of Cahfomia Department of Park and Recreation
The Archaeologist shall be responsible for recording (on the appropriate State of
Califomia Department of Park and Recreafion forms-DPR 523 A/B) any significant
or potenfially significant resources encountered during the Archaeological
Monitoring Program in accordance with the City's Historical Resources Guidelines,
and submittal of such fonns to the South Coastal Inforariafion Center with the Final
Results Report.
Geology/Soils
I
GEO-1 All proposed facilifies shall be designed and built in accordance with the
seisinic design provisions ofthe 1997 Uniform Building Code or the 2001
Califomia Building Code. Additionally, all facets of excavafion, constmction,
and facility design shall meet the standards established during final
engineering design. Specifically, this shall include measures such as the over-
excavafion of unsuitable base soils and geologic units, the proper composifion,
placement, and compaction of all constmcfion fill, the use of addifional
foundafion design techniques as necessary, and the ufilization of appropriate
constmction materials and methods.
juiy2007 -; :y^y: ,p>:,:- Z.::- -: )ZjZ,Z:->ZZZ "Vv>;^.:^;^..:'••:^•.: :- ^Z -ZZ 'ZZ-u-P'P'^.P'-z:. • 4775-09
, NAHI Western Segment ^Realignment Project,MND . ,',', " y.'-,, ' ' •- :'''^'J^Z'''Z^:y''-. ' ', ' ' •. 3.^0
Sect/on 3.0
Environmental Impact Assessment Form - Initial Study
GEO-2
GEO-3
GEO-4
GEO-5
GEO-6
During final design, the City shall performed design-level geotechnical
investigations to evaluate the potenfial for liquefaction and seismic instability
to affect the approved project and all associated facilities. Where these
hazards are found to exist, appropriate engineering design and constmcfion
measures shall be incorporated into the project design. Appropriate measures
could include ground improvement of liquefiable zones;
Design and constmcfion shall be implemented under the direct supervision of
a geotechnical engineer or engineering geologist as prescribed by the
California'Board of Consumer Affairs. These professionals shall be licensed
in Califomia by the Califomia Board of Consumer Affairs.
All trenching micro-ttjnneling and site preparation shall be performed under
the observation of a geotechnical engineer and in accordance with the City's
Grading Ordinance, Standard Specification for Public Works, and the 1997
Regional Supplemental Amendments.
All unconsolidated and loose soils shall be excavated to competent soils or
formational soil and benched, as required by the City's grading ordinance.
Stmctural fill soils shall be compacted to a minimum 90 percent of the
maximum dry density, as determined by ASTM Test Method D 1557-91.
Moishare content in the fill shall be maintained between the opfimum moisture
content and three percent over opfimum.
All trenching and micro-ttinneling activifies shall comply with OSHA and
CALOSHA requirements. Excavated areas shall be shored or sloped back for
stability. Trench shields may be used in place of shoring or sloping the
excavation, provided that OSHA and CALOSHA requirements are followed.
Any shoring designs shall be reviewed by the geotechnical engineer or other
qualified personnel. Excavation conditions shall be checked in the field and
adjusted as necessary.
Hydrology and Water Quality
HYDRO-1 Short-term water quality impacts during constmction shall be minimized by
complying with federal and state regulations for groundwater discharge into
surface water bodies. All discharges shall be in compliance with RWQCB
requirements. If dewatering activifies associated with trenching, boring and
July 2007 4775-09
NAHI Western Segment Realignment ,(project MND 3-61
Sect/on 3.0
Environmental Impaa Assessment Form - Initial Study
I
I
I
excavation result in possible exposure to contaminated groundwater and/or
soils, the City shall ensure compliance with the State of Califomia CCR
Tifie 24 Health and Safety Regulafions as managed by the San Diego
County Department of Environmental Health. Additionally,, the City shall
ensure compliance with the Clean Water Act and National Pollutant
Discharge : Eliminafion System (NPDES) regulafions regarding water
discharge from constmction activities to surface waters.
. HYDRO-2 rThe xoristrucfion contractor shall be required/to implement BMPs during
cohstruction in accordance with the plans and specifications.prepared for the
project, the General Constmcfion Storm Water Permit (NPDES Order 99-
08-DWQ), and to the satisfaction of the City Engineer. These BMPs shall
address temporary soils stabilization, temporary sediment control, wind
erosion control, tracking control, and non-stormwater management.
HYDRO-3 All equipment and vehicles required for constmction, maintenance and
operation shall be refueled or maintained within paved roadways or
designated staging areas. All stationary equipment, such as motors or
generators, shall be stored on the existing access road, drip pans shall be
placed under all potential discharge conduits or leaks. All connections and
fittings of hoses shall be periodically checked for leaks.
HYDRO-4 All project related spills of hazardous materials shall be reported to the
appropriate enfifies, including the USFWS, CDFG, RWQCB, and shall be
cleaned up immediately. Contaminated soils shall be removed to approved
disposal areas.
J(jly:2007 -./V :ZZ/ ' ' ' ; ' \Z'' , -Z''- ' Z . . '\\ ' ' Z.. 4775-09
NAHI Western Segment RealignmentProject MND ' . " ' , ' .• ,. . . '3.62
Page 1,of 14
PROJECT NAME:
APPROVAL DATE:
North Aqua Hedionda Interceptor Western
Segment Realignment Proiect
FILE NUMBERS:
The following environmental mitigation measures were incorporated into the Conditions of Approval for this project in order to mitigate
identified environmental impacts to a level of insignificance. A completed and signed checklist for.each mitigation measure indicates that
this mitigation measure has been complied with and implemented, and fulfills the City's monitoring requirements with respect to Assembly
iBill 3180 (Public Resources Code Section 21081.6).
Mitigation Measure Monitoring Monitoring
Department
; Shown on:
Plans
• Verified
Implementation Remai-ks
Biological Resources
Mitigation Measures for Sensitive Wildlife Species
The City construction contractor shall avoid construction
activities outside of the February 15 through August 31
bird breeding season; or.
A qualified biologist shall conduct a focused survey for bird
nests 500 feet from construction activities not more than
72 hours prior to commencement of construction. If active
nests are found, noise levels at or below 60 dBA Leq shall
be maintained anywhere within 300 feet of occupied nest
locations of sensitive species. The maintenance of
acceptable noise levels shall be confirmed through noise
measurements at active nest locations during peak
construction activity by a qualified acoustician.
Project Design Feature B-1: Construction plans, for
staging Area B shall note that all direct impacts to coastal
sage scrub (including disturbed forms) shall be avoided
dunng construction through the placement of temporary
fencing and monitoring by a.qualified biologist.
Explanation of Headings:
Type = Project, ongoing, cumulative.
Monitoring Dept. = Department, or Agency, responsible for monitoring a particular
.. mitigation measure.
Information. ' ,
, Shown on Plans = When mitigation measure is shown on plans, this column will be
, -initialed and dated.
Verified Implementation = When mitigation rheasure has been implemented,
this column will be initialed and dated.
Remarks = Area for describing status of ongoing mitigation measure, or for other,
RD - Appendix P..
Page 2 of 14
Mitigation Measure Monitoring
Type
Monitoring
Department
Shown on
Plans
Verified
Implementation Remarks
Cultural Resources
Testing to Determine Site Significance and Monitoring of
all, earthmoving activities shall occur to the satisfaction of
the. City of Carlsbad Planning Department.' Testing and
..Arphaeological Monitoring shall consist of the following
measures:
•TfeStinq. Prior to ground disturbance activities, a qualified
archaeologist approved by the City of Carlsbad shall test
those sites that have not yet been tested so that a
determination of significance can be made. If the resource
,is; determined to be significant, then impacts shall be
mitigated through avoidance if feasible. If avoidance is not
feasible, then mitigation of impacts through the
Data Recoverv. If site avoidance, the preferred mitigation
measure, is not feasible, then a data recovery program
shall be prepared and approved by the City of Carlsbad td
recover a large enough sample of cultural material so that
information of importance in addressing regional research
questions will not be irretrievably lost through impacts.
Monitoring. Provide a qualified archaeological monitor and
Native American monitor shall be provided during
epnstruction so that, buried cultural resources can be
Identified in the field. Upon identification, the resource(s)
shall be tested to determine significance with appropriate
.rhitigation measures used as identified, above.
The City of Carlsbad Cultural Resource Guidelines provide
the following specific measures to conduct the monitoring
and evaluation program that shall be used for cultural
Explanation of Headings:
Type = Project, ongoing, cumulative.
Monitoring Dept. = Department, or Agency, responsible for
mitigation measure. monitoring a particular
information.
Shown on,Plans = When mitigation measure is shown on plans, this column will be
•, : • ' initialed and dated.
Verified Implementation = When mitigafion rneasure'has been implemented,
this column will be initialed and dated. :
Remarks = Area for describing status of ongoing mitigation measure, or for other
RD - Appendix P.
Page 3 of 14
Mitigation Measure
resources within the NAHI project area.
Prior to Preconstruction (Precon) Meeting
1. Planning Department (PD).PIan Check
Pnor to the first Precon Meeting, the Environmental
Compliance Officer/Planner (ECO/P) of PD shall verify that
,.the requirements for Archaeological Monitoring and Native
Amencan monitoring, if applicable, have been noteci on the
'appropriate construction,documents.
2 Submit Letter of Qualification to ECO/P
Prior to the first Precon Meeting, the applicant shall
provide a letter of verification to the ECO/P stating that a
.qualified Archaeologist has been retained to implement the
monitonng program.
3. Records Search Prior to Precon Meeting
At least thirty days prior to the Precon Meeting the
qualified Archaeologist shall verify that a records search
has been completed and updated as necessary and
introduce any pertinent information concerning
expectations and probabilities of discovery during
trenching and/or grading activities. Verification includes;
but IS not limited to,' a copy of a confirmation letter from
South Coastal Information Center or a letter of verification
that the Archaeologist has conducted a recent record
search for the project site. . .
Monitoring
Type
Explanation of Headings:
Type^ = Project, ongoing, cumulative.
. Monitoring Dept. = Department, or Agency, responsible for monitoring a particular
, mitigation measure. . .
.information. •
Shown on Plans = When mitigation measure is shown on plans, this column will be
initialed and dated.
Monitoring
Department
Shown on
Plans
Verified
Implementation Remarks
Verified Implementation = When mitigation measure has been implemented,
this column will be initialed and dated.
Remarks = Area for describing status of ongoing mitigation measure, or for other
RD- Appendix P.
Page 4 of 14
Mitigation Measure Monitoring:
Type
- Monitoring
Department
Shown on
Plans
Verified
Implementation Remarks
Precon Meeting
1. Monitor Shall Attend Precon Meetings
Prior to beginning any work that requires monitoring, the
Applicant shall arrange a Precon Meeting that shall
include the Archaeologist, Construction Manager and/or
Grading Contractor. The qualified Archaeologist shall
attend any grading related Precon Meetings to make
comments and/or suggestions concerning the
Archaeological Monitoring program with the Construction
Manager and/or Grading Contractor.
2. Identify Areas to be Monitored
At the Precon Meeting, the Archaeologist shall submit to
ECO/P a copy of the site/grading plan (reduced to 11x17)
that identifies areas to be monitored as well as areas that
may require delineation of grading limits.
During Construction
Monitor Shall be Present During Grading/Excavation
a. The qualified Archaeologist shall be present full-
time during grading/excavation of native soils and
shall document activity via the Consultant Monitor
Record., This record shall be sent to the ECO/P, as
appropriate, each month.
2. Monitoring
a. Trenches will include staging areas and all pit and
Explanation of Headings:
Type = Project, ongoing, cumulative.
Monitoring Dept. = Department, or Agency, responsible for monitoring a particular mitigation measure.
information.
Shown on Plans = When mitigation measure is shown on plans, this column will be
initialed and dated.
Verified Implementation = When mitigation measure has been implemented
this column will be initialed and dated.
Remarks = Area for describing status of ongoing mitigation measure, or for other
RD - Appendix P.
Page 5 of 14
IVjItigation Measure
micro tunneling pit areas, access areas and all
appurtenances. Monitoring of trenches is required
. for the staging areas and all pit and micro tunneling
pit areas, access areas and all appurtenances,
services and all other appurtenances that impact
-native soils as detailed on the plans or in the
contract documents identified by drawing number
or plan file number. It is the Construction
• Manager's responsibility to keep the monitors up-
to-date with current plans.
3: .,- Discoveries
b.
Discovery Process
In the event of a discovery, and when requested
by the Archaeologist, or the Principal Investigator
(PI) if the Monitor is not qualified as a PI, the
Construction Manager (CM), as appropriate, shall
be contacted and shall divert, direct or
temporarily halt ground disturbing activities in the
area of discovery to allow for preliminary
evaluation of potentially significant archaeological
resources. The PI shall also immediately notify
ECO/P of such findings at the time of discovery.
Determination of Significance
The significance of the discovered resources
• shall be determined by the PI. For significant
archaeological resources, a Research Design
and Data Recovery Program shall be prepared,
approved by the agency and carried. out to
mitigate impacts before ground-disturbing
activities in the area of discovery will be allowed
to resume.
Mpnitpring.
Type> V.
Explanation of Headings:
Type = Project, ongoing, cumulative.
Monitoring Dept. = Department, or Agency, responsible for monitoring a particular
mitigation measure.
information. •
Stiown on Plans = When mitigation measure is shown on plans, this column will be
initialed and dated.
Monitoring .
Department-
Shown on
Plans';^
Verified
Implementation: Remarks
Verified Implementation = When mitigation measure has been implemented,
this column will be initialed and dated.
Remarks = Area for describing status of ongoing mitigation measure, or for other
RD - Appendix P.
Page 6 of 14
Mitigation IVIeasure Monitoring:
Type .•
Monitoring ,:
Departmerit
Shown on
Plans
'Verified^
Implementation Remarks
Minor Discovery Process for Pipeline Projects
For all projects: The following is a summary of the
criteria and procedures related to the evaluation
of small cultural resource deposits during
excavation for pipelines.
, (1) Coordination and Notification
(a) Archaeological Monitor shall notify PI,
CM and ECO/P, as appropriate.
(2) Criteria used to Determine if it is a Srnall
Cultural Resource Deposit
(a) The deposit is limited in size both in
length and depth; and,
(b) The information value is limited and is
not associated with any other resources;
and,
(c) There are no unique features/artifacts
associated with the deposit:
(d) A preliminary description and
photographs, if available, shall
be transmitted to ECO/P.
(e) ECO will forward the information
to Planning for consultation and
verification that it is a small
historic deposit.
(3) Procedures for documentation, curation and
reporting the following constitutes adequate
mitigation of a small historic deposit to
. reduce impacts due to excavation activities
to below a level of significance. •
(a) 100% of the artifacts within the trench
alignment and width shall , be
documented in-situ, to . . include
Explanation of Headings:
Type = Project, ongoing, cumulative.
Monitoring Dept. = Department, or Agency, responsible for monitoring a particular
mitigation measure.
information.
Shown on Plans = When mitigation measure is shown on plans, this column will be
initialed and dated.
Verified Implementation = When mitigation measure has been implemented,
this column will be initialed and dated.
Remarks = Area for describing status of ongoing mitigation measure, or for other
RD - Appendix P.
Page 7 of 14
Mitigation MeasM^^^ Moriitpring' ;:Mpnitoring :
Department
Shown on
,,'.Plans
Verified
Implerriehtation Remarks
. photographic records, plan view of the
; trench and profiles of sideWalls,
recovered, photographed after cleaning,
"iv and analyzed and curated.
• ; (b) The remainder of the deposit within the
limits of excavation (trench, walls) shall
be left intact,
(c) The Final Results Report shail include a
: requirement for monitoring of any future
work in the vicinity.
4. Hurnan Remains
• Z If human remains are discovered, work shall halt in
?• V that area and procedures set forth in the California
; K Public Resources Code (Sec. 5097.98) and State
Health and Safety Code (Sec. 7050.5) shall be
: . followed as follows:
a. . Notification
(1) Archaeological Monitor shall notify the
PI, CM and ECO/P.
(2) The PI shall notify the County Coroner after
consultation.
: b. Stop work and isolate discovery site
(1) CM/ECO/P, as appropriate, shall stop work
immediately in the location of the discovery
and any nearby area reasonably suspected to
overlay adjacent human remains until a
determination can be made by the Couhty
Coroner in consultation with the PI
V,. concerning the origin of the remains and the
cause of death.
Explanation of Headings:
Type = Project, ongoing, cumulative.
Monitoring Dept. = Department, or Agency, responsible for monitoring a particular
mitigation measure.
information.
Shown on Plans = When mitigation measure is shown on plans, this column will be
• initialed and dated.
Verified Implementation = When mitigation measure has been implemented,
this column will be initialed and dated.
Remarks = Area for describing status of ongoing mitigation measure, or for other
RD - Appendix P.
Page 8 of 14
Mitigation Measure
; (2) The County Coroner, in consultation with the
PI, shall determine the need for a field
investigation to examine the remains and
• ' . establish a cause of death.
, (3) If a field investigation is pot warranted, the PI,
in consultation with the County Coroner, shall
determine if the remains are of. Native
~ American origin.
;c. If Human Remains are Native American
^(1) The Coroner shall notify the Native American
. " Heritage Commission (NAHC). (By laW,
ONLY the Coroner can make this call.)
, (2) NAHC will identify the person or person's it
believes to be the Most Likely Descendent
(MLD).
(3) The MLD may make recommendations to
the landowner or PI responsible for the
excavation work to determine the treatment,
with appropriate dignity, of the human
remains and any associated grave goods
(PRC 5097.98).
d. If Human Remains are not Native American
(1) The PI shall contact the NAHC and notify
them of the historical context of the burial.
(2) NAHC will identify the person or persons it
believes to be the MLD.
(3) The MLD may make recommendations to
.. . the landowner or PI responsible for the
excavation work to determine the treatment
ofthe human remains (PRC 5097.98).
,. (4) If the remains are of historic origin, they shall
be appropriately removed and conveyed to
Monitoring :
Type :
Monitoring,
Department
Shown on
Plans,. .
Verified '
Implementation Remarks
. !
Expiariation of Headings:
Type = Project, ongoing, cumulative.
Monitoring Dept. = Department, or Agency, responsible for monitoring a particular
mitigation measure.
information.
Shown on Plans = When mitigation measure is shown on plans, this column will be
initialed and dated. .
Verified Implementation = When mitigation measure has been implemented,
this column will be initialed arid dated.
Remarks = Area for describing status of ongoing mitigation measure, or for other
RD - Appendix P.
Page 9 of 14
Mitigation lyieasure Monitoring
Type
Monitoring
Department
Shown on
. Plans
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Implementation Remarks
the coroner, specialist, or Museum of;Man
for analysis. The decision for reinterment :of
human remains shall be made in
consultation with ECO/P, the landowner, PI
and the NAHC/MLD.
e. Disposition of Human Remains
the landowner, or his authorized representative,
shall reinter the Native American human remains
and any associated grave goods, with appropriate
dignity, on the property in a location not subject to
further subsurface disturbance, IF:
(1) The NAHC is unable to identify the MLD, or
the MLD failed fo make a recommendation
within 24 hours after being notified by the
Commission; or;
(2) The landowner or authorized representative
rejects the recommendation of the MLD and
mediation in accordance with PRC 5097.94
(k) by the NAHC fails to provide measures
acceptable to the landowner.
Notification of Completion
The Archaeologist shall notify the ECO/P, in writing of
the end date of monitoring.
Post Construction
Handling and Curation of Artifacts and Letter of
Acceptance
a. The Archaeologist shall be responsible for
ensuring that all cultural remains collected are
Explanation of Headings:
Type = Project, ongoing, cumulative.
Monitoring Dept. = Department, or Agency, responsible for monitoring a particular
mitigation measure.
Information.
Shown on Plans = When mitigation measure is shown on plans, this column will be
initialed and dated.
Verified Implementation = When mitigation measure has been implemented,
this column will be Initialed and dated.
Remarks = Area for describing status of ongoing mitigation measure, or for other
RD - Appendix P.
Page 10 of 14
Mitigation Measure Monitoring
Type
Monitoring
Department
Shown pn
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Implementation Remarks
cleaned, catalogued, and permanently curated
with an appropriate institution; that a letter of
acceptance from the curation institution has been
submitted to the Planning Department; that all
artifacts are analyzed to identify function and
chronology as they relate to the history of the
area; that faunal material is identified as to
species; and that specialty studies are completed,
as appropriate,
b. Curation of artifacts associated with the survey,
testing and/or data recovery for this project shall
, be completed in consultation with ECO/P and the
Native American representative, as applicable.
2. Final Results Reports (Monitoring and Research
Design and Data Recovery Program)
a. Within three months following the completion of
monitoring, two copies of the Final Results Report
(even if negative) and/or evaluation report, if
applicable, which describes the results, analysis,
and conclusions of the Archaeological Monitoring
Program (with appropriate graphics) shall be
submitted to ECO/P for approval.
b. For significant archaeological resources
encountered during monitoring, the Research
Design and results of the Data Recovery Program
shall be included as part of the Final Results
Report.
3. Recording Sites with State of California Department of
Park and Recreation
The Archaeologist shall be responsible for recording
(on the appropriate State of California Department of
Park and Recreation forms-DPR 523 A/B) any
Explanation of Headings:
Type = Projecf, ongoing, cumulative.
Monitoring Dept. = Department, or Agency, responsible for monitoring a particular
mitigation measure.
Information.
Shown on Plans = When mitigation measure is shown on plans, this column will be
initialed and dated.
Verified Implementation = When mitigation measure has been implemented,
this column will be initialed and dated.
Remarks = Area for describing status of ongoing mitigation measure, or for other
RD - Appendix P.
Page 11 of 14
Mitigation Measure Monitoring
Type
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Department
Shown on
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significant or potentially significant resources
encountered during the Archaeological Monitoring
Program in accordance with the City's Historical
Resources Guidelines, and submittal of such forms to
the South Coastal Information Center with the Final
Results Report.
Geology/Soilis
GEO-1 All proposed facilities shall be designed and built
in accordance with the seismic design provisions
of the 1997 Uniform Building Code or the 2001
California Building Code. Additionally, all facets
of excavation, construction, and facility design
shall meet the standards established during final
engineering design. Specifically, this shall
include measures such as the over-excavation of
unsuitable base soils and geologic units, the
proper composition, placement, and compaction
of all construction fill, the use of additional
foundation design techniques as necessary, and
the utilization of appropriate construction
materials and methods.
GEO-2 During final design, the City shall performed'
design-level geotechnical investigations to
evaluate the potential for liquefaction and seismic
instability to affect the approved project and all
associated facilities. Where these hazards are
found to exist, appropriate engineering design
and construction measures shall be incorporated
into the project design. Appropriate measures
could include ground improvement of liquefiable
zones.
Explanation of Headings:
Type = Project, ongoing, cumulative.
Monitoring Dept. = Department, or Agency, responsible for monitoring a particular
mifigation measure.
information.
Shown on Plans = When mitigation measure is shown on plans, this column will be
initialed and dated.
Verified Implementation = When mitigation measure has been implemented,
this column will be initialed and dated. .
Remarks = Area for describing status of ongoing mitigation measure, or for other
RD - Appendix P.
Page 12 of 14
Mitigation Measure Monitoring
Type
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Department
•Shown on:
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Implernehtation Remarks
GEO-3 Design and construction shall be implemented
under the direct supervision of a geotechnical
engineer or engineering geologist as prescribed
by the California Board of Consumer Affairs.
These professionals shall be licensed in
California by the California Board of Consumer
Affairs.
GEO-4 All trenching micro-tunneling and site preparation
shall be performed under the observation of a
geotechnical engineer and in accordance with the
City's Grading Ordinance, Standard Specification
, for Public Works, and the 1997 Regional
; , . , Supplemental Amendments.
.GEO-5 All unconsolidated and loose soils shall be
excavated to competent soils or formational soil
and benched, as required by the City's grading
ordinance. Structural fill soils shall be compacted
to a minimum 90 percent of the maximum dry
density, as determined by ASTM Test Method D
1557-91. Moisture content in the fill shall be
maintained between the optimum moisture
content and three percent over optimum.
GEO-6 Air trenching and micro-tunneling activities shall
comply with OSHA and CALOSHA requirements.
Excavated areas shall be shored or sloped back
for stability. Trench shields may be used in place
of shoring or sloping the excavation, provided
that OSHA and CALOSHA requirements are
followed. Any shoring designs shall be reviewed
by the geotechnical engineer or other qualified
Explanation of Headings:
Type = Project, ongoing, cumulative.
Monitoring Dept. = Department, or Agency, responsible for monitoring a particular
. mitigation measure.
infonnation.
Shown on Plans = When mitigation measure is shown on plans, this column will be
initialed and dated.
Verified Implementation = When mitigation measure has been implemented,
this column will be initialed and dated.
Remari<s = Area for describing status of ongoing mitigation measure, or for other
RD - Appendix P. ' •
Page 13 of 14
MitigationMeasure Monitoring
Type
Monitoring,
Department'
Shown on
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Verified
Implementation Remarks
personnel. Excavation conditions shall be
checked in the field and adjusted as necessary.
Hydrology and Water Quality
.HYDRO-1 Short-term water quality impacts during
construction shall be minimized by complying
with federal and state regulations for
groundwater discharge into surface water
bodies. All discharges shall be in compliance
with RWQCB requirements. If dewatering
activities associated with trenching, boring and
' / excavation result in possible exposure to
contaminated groundwater and/or soils, the
City shall ensure compliance with the State of
California CCR Title 24 Health and Safety
Regulations as managed by the San Diego
County Department of Environmental Health.
Additionally, the City shall ensure compliance
with the Clean Water Act and National
Pollutant Discharge Elimination System
(NPDES) regulations regarding water
discharge from construction activities to
surface Waters.
HYDRO-2 The construction contractor shall be required
to implement BMPs during construction in
accordance with the plans and specifications
prepared for the project, the General
Construction Storm Water Permit (NPDES
Order 99-08-DWQ), and to the satisfaction of
the City Engineer. These BMPs shall address
temporary soils stabilization, temporary
• sediment control, wind erosion control.
Explanation of Headings:
Type = Project, ongoing, cumulative.
Monitoring Dept. = Department, or Agency, responsible for monitoring a particular
mitigation measure. ,
information.
Shown oh Plans = When mitigation measure is shown on plans, this column will be
initialed and dated. ,
Verified Implementation = When mitigation measure has been implemented,
this column will be initialed and dated.
Remarks = Area for describing status of ongoing mitigation measure, or for other
RD - Appendix P.
Page 14 of 14
Mitigation Measiure Monitoring':
Type •
Monitoring
Department
Shown en
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Implementation Remarks
tracking control,
management.
and non-stormwater
HYDRO-3 All equipment and vehicles required for
construction, maintenance and operation shall
be refueled or maintained within paved
roadways or designated staging areas. All
stationary equipment, such as motors or
generators, shall be stored on the existing
access road, drip pans shall be placed under
all potential discharge conduits or leaks., All
connections and fittings of hoses shall be
periodically checked for leaks.
HYDRO-4 All project related spills of hazardous materials
shall be reported to the appropriate entities,
including the USFWS, CDFG, RWQCB, and
shall be cleaned up immediately.
Contaminated soils shall be removed to
approved disposal areas.
Explanation of Headings:
Type = Project, ongoing, cumulative.
Monitoring Dept. = Department, or Agency, responsible for monitoring a particular
mitigation measure.
information.
Shown on Plans = When mitigation measure is shown on plans, this column will be
initialed and dated.
Verified Implementation = When mitigation measure has been implemented,
this column will be initialed and dated.
Remari<s = Area for describing status of ongoing mitigation measure, or for other
RD - Appendix P.
Sect/on 3.0
Environmental Impaa Assessment Form - Initial Study
APPLICANT CONCURRENCE WITH MITIGATION MEASURES
THIS IS TO CERTIFY THAT 1 HAVE REVIEWED THE ABOVE MITIGATING
MEASURES AND CONCUR WITH THE ADDITION OF THESE MEASURES TO THE
PROJECT.
(^/ o/o 7
Date
//
Signature
July 2007 4775-09
NAHI Western Segment Realignrrient Project MND 3-63
ATTACHMENT A
Biological Resources Letter Report
Dudek March, 2007
DUDEK
May 1,2007
MAIN OFFICE
605 THIRD STREET
ENCINITAS. CALIFORNIA 92024
T 760.942.5147 T 800.450.1818 F 760.632.0164
4775-05
Mr. Mark Biskop
City of Carlsbad
1635 Faraday Avenue
Carlsbad, CA 92008
Subject: Biological Resource Letter Report
NAHI Westem Segment Realignment Project, Carlsbad, CaUfomia
Dear Mr. Biskup:
INTRODUCTION
In October 2004, the City of Carlsbad icertified a Final Environmental Lnpact Report (EIR) arid
approved the North Agua Hedionda Interceptor (NAHI) Westem Segment Sewer Maintenance
Access Road and Shoreline Protection Project The purposes of that project was to restore tiie access
road that has deteriorated substantially over the years due to wave, water and wind erosion, and
provide shoreline stabilization to avert further undennining and/or erosion, and to allow future
routine sewer maintenance cleaning, rehabilitation and emergency repairs of the westem segment of
theNAHL
In September 2005, the City submitted a coastal development permit application to the Califomia
Coastal Commission (Commission) for the project As part of the Commission permit application
process, concems were raised regarding construction of the shoreline protection wall as well as
impacts to oivironmentally sensitive habitat areas (ESHA) and wetiands. To address the
Commission's concems, the City has re-designed the project to relocate the existing NAHI located
along the northem shoreline of the Aqua Hedionda Lagoon to further inland by utilizing micro-
tunneling techniques. The re-designed project, referred to as the "NAHI Westem Segment
Realignmeait Project," would eliminate the need to re-establish the sewer maintenance access road
and constmct the associated trail, as well as constraction of the shoreline protection wall and would
also avoid impacts to wetiands and to ESHA.
The purposes of this letter are to review the biological resources assessmoit conducted for the
original project and provide an updated assessment of impacts associated with the new realignment
project. This letter includes discussions of mefliodology, results (i.e., existing biological conditions),
impacts analysis, determination of significant impacts and recommended mitigation measures. Hiis
letter report, along witii the original Biological Resources Technical Report (Dudek 2004) provides
Mr. Mark Biskup
Re: Biological Resources Letter Report, NAHI Westem Segment Realignment Project
sufficient infonnation to evaluate project impacts to biological resources pursuant to the California
Environmental Quality Act (CEQA), state and federal wetiands and endangered species regulations,
and the City of Carlsbad Habitat Management Plan (HMP).
METHODS
Sensifive biological resources present or potaitially present onsite were id^tified through a
literature search using the following sources: U.S. Fish and Wildlife Service (2006), Califomia
Natural Diversity Database (CDFG 2006 a, b, c), tiie Califomia Native Plant Society (CNPS)
Inventory or Rare and Endangered Vascular Plants (CNPS 2006), and the vegetation and sensitive
species maipping performed for the Multiple Habitat Conservation Program (SANDAG 2001).
General infoimation regarding Avildhfe spedes present in the region was obtmned form Unitt (1984),
Ehrlich (1988), and Garrett and Dunn (1981) for Birds; Bond (1977) fw mammals; Stebbins (1985)
for reptiles and amphibians; and Emmel and Emmel (1973) for butterflies.
Dudek biologist Jennifer Tumbull conducted a biological reconnaissance survey and general wildlife
survey of the project study area on January 15,2007. The survey took place from 1:15 to 3:45 pm
with weathCT consisting of clear skies, 60 to 65 degree temperatures, and winds ihat ranged fix)m
three to 12 miles per hour. During this survey the entire project area was walked and vegetation
communities within flie project study area that were previously mapped by Dudek in 2001 were
visually confirmed. A more detailed delineation of vegetation community boundaries was conducted
witiiin the proposed staging area B using a global positioning system (GPS) backpack unit with sub-
meter accuracy. All wildhfe observed within the study area was recorded {Appendix B).
Following completion of the field work, the vegetation boundaries were transferred to a topographic
base and digitized into an AutoCAD drawing. Using ArcCAD, a GIS coverage was created, and the
acreages of each vegetation type were determined.
All vegetation communities were m^)ped according to Holland (1986) with modifications to
accommodate the lack of conformity of the observed communities to those of Holland.
Wildlife species detected during the field survey by sight, vocalizations, burrows, and other sign
were recorded. Binoculars were used to aid in the identification of obsorved wildlife. Latin and
common names of animals referred to in this report follow Stebbins (1985) for reptiles and
amphibians, American Omitiiologists' Union (1983,1989,2000) forbirds, and Jones et al. (1997) for
mammals. A cumulative list of wildlife species observed on the project site during all surveys is
presented in Appendix B.
DUDEK 4775-05
2 May 2007
Mr. MarkBiskup
Re: Biological Resources Letter Report, NAHI Westem Segment Realignment Project
RESULTS
Project Location
The proposed project is located along the north shore of Agua Hedionda Lagoon fiom Hoover Street
in the west to Cove Drive in the east (Figures I & 2). Land use within the study area has not
changed substantially since the 2004 report. Other physical characters such as hydrology, soils,
topography are also unchanged and exist as described in the 2004 report.
Vegetation Communities and Land Covers
Based on species composition and general physiognomy, eight native vegetation communities or
habitat types were identified onsite: opai water, intertidal mudflat, intertidd rocky shore, southem
coastal salt marsh, disturbed southem coastal salt marsh, disturbed southem willow scmb, coastal
sage scmb, and disturbed coastal sage scrab (Fibres 3A-3E). In addition, five altered or non-native
vegetation communities or land covers are present annual (non-native) grassland, eucalyptus
woodland, disturbed land, omamental, and developed land. The acreage of each vegetation
community and land cover type within the project study area, based on the 2007 survey, is presented
in Table 1.
In general, vegetation communities and land cover types exist in the same location and with the same
composition of species as documented in Dudek's previous Biological Resources Technical Report
(Dudek2004). Changes observed during the January2007 site visit include the expansion of coastal
salt marsh near Hoover Ehive, boimdaiy adjustments of coastal sage scmb in and around proposed
staging area B, and conversion of land aroimd the proposed eastem tunnel pit location.
Within the vicinity of sta^g area B, vegetation was mapped at a high level of detail. Three types of
communities were identified in the area: coastal sage scmb containing native shrob cover of 50% or
greater, disturbed coastal sage scrub supporting native shrab cover of 20 to 50%, and disturbed
habitat siq)porting native shmb cover less than 20%. A minimum mapping unit of 0.1 acrewasused
in the area in order to document any potential ESHA. The same mapping thresholds were used in the
assessment of highly disturbed land near the proposed eastem tunnel pit location. Although native
shrubs are present within that area, shmb cover is less than 20% in any given 0.1-acre area and
therefore the area is mapped as disturbed habitat
DUDEK 477S05
3 May 2007
Mr. MarkBiskup
Re: BiologicalResources Letter Report, NAHI Westem Segment Realignment Project
TABLE!
EXISTING VEGETATION COMMUNITY & LAND COVER TYPES
fismsi Grassfand
Coastal Salt 0.60
Dteturbed Coastal Salt 0.06
Coastal Sage Scrub 4.12
D'lsturted Coastal Sage Scrub 0.63
Developed Land 8.87
Developed. Land-Jurisdicfional 0.05
Disturbed Land ; - 5.11
Eucalyptus Woodland 0.38
Int^tidal Mudflat 3.22
Intertidal Rocky Beac^ 0.25
Omamental Plantings 0.77
Open Water 0.91
Disturbed Southem WiDow Scrub
0.08
0.11
'EST COP
Jurisdictional Waters
In addition to the regulated wetiand habitat types described above, two unvegetated ephemeral
stream channels occur in the project study corridor. These areas are defined by a bed and bank,
support an ordinary high water level between one and three feet wide, but do not suj^ort wetiand
vegetation. ' Rather, they support vegetation consistent with surrounding uplands. As stream
chaimels, these areas are considered non-wetiand waters regulated by sections 401 and 404 of the
Clean Water Act and Section 1600 of the Fish and Game Code and are thoefore considered sensitive
resources.
The alignment of the easton drainage was modified as a result of the 2007 survey. This drainage
appears to have been reah'gned during constmction ofthe private residence on that parcel.
Zoology-Wildlife Diversity
Qffliulative survey visits to the project site resulted in the observation of 48 bird species, I reptile
species, 5 rpammal species, and 20 invertebrates, including 8 butterfly species and 12 intertidal
DUDEK 4775-05
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Mr. Mark Biskup
Re: BiologicalResources Letter Report, NAHI Westem Segment RealignmentProject
species. Overall composition of wildlife species within the study area has not changed based on
conditions obsaved during the 2007 survey. A hst of wildlife species observed witiiin flie project
area is presented in ^/>pen</ix 5.
Sensitive Plant Species
One sensitive plant species was confirmed within the project study area: soufliwestem spiny rush
(Juncus acutus spp. leopoldii)' As was previously determined, the site does not support habitat for
othCT sensitive plant species. A cumulative list of plant ^ecies observed within the project area is
presented ia Appendix A.
Sensitive Wildlife Species
One fedCTally-hsted threatened wildlife species was confirmed to occupy habitat witii the project
study area: two pairs of Califomia gnatcatcher (PoUoptila califomica). One non-listed wildlife
species considered locally sensitive, the salt marsh skipper {Panoquina errans) was previously
observed within the project study area arid is considered to still be present based on unchanged
habitat conditions. Focused surveys resulted in observation of 16 individuals in seven locations
throughout the project alignment. The salt marsh skipper is a HMP covered species. The general
Agua Hedionda Lagoon environment supports habitat for other sensitive wildlife species including:
silvery legless lizard {Anniella pulchra pulchra), coastal westem whiptail {Cnemidophoms tigris
multiscutatus), orange-throated whiptail {Cnemidophoms hyperythrus beldingi), San Diego homed-
lizard {Phrynosoma coronatum blainvillei), Soufliem Califomia rafous-arowned sparrow {Aimophila
mficeps canescens), westem snowy plover {Charadrius alexandrinus nivosus), Califomia homed
lark {Eremophila alpestris actia), loggerhead shrike {Lanius ludoviciarms), large-billed savannah
sparrow {Passerculus sandmchensis rostratus), Belding's savannah sparrow {Passerculus
sandwichensis beldingi), white-faced ibis (Plegadis chihi), westem burrowing owl {Speotyto
cunicularia hypugaea), elegant tem {Sterna elegans), California least tem {Sterna antillamm
browni), Dulzura California pocket mouse, {Chaetodipus califomicus femoralis), San Diego black-
tailed jackrabbit {Lepus califomicus bennettii), San Diego desert woodrat {Neotoma lepida
intermedia), and American badger {Taxidea taxus).
Wildlife Corridors and Habitat Linkages
Due to its location and surrounding residential development, the habitat present vrithin the project
site is not connected to any substantial natural terrestrial habitat. Several small patches of coastal
sage serab occur northeast of the site but are separated by development These areas likely function
more as a buffer for waterbirds using the lagoon or intertidal area than as a movement corridor for
DUDEK 4775^5
... 5, May2007
I Mr. MarkBiskup
Re: Biological Resources Letter Report, NAHI Westem Segment Realignment Project
upland species. The intertidal area also is not likely to function as a movement corridor as it is
bounded on both the east and west ends by marinas.
Regional Resource Planning Context
The lagoon lies within Local Facilities Management Plan Zone I as addressed in the City's Growth
Manageinent Program. The planning standards for this zone include no net loss of wetiands,
presmration of coastal sage scmb, and management of natural habitats adjacent to the lagoon as
wetiands bufiTers. Unavoidable impacts should be mitigated by creation or enhancement of like
habitats adjacent to the lagoon or within biological core and linkage areas.
Agua Hedionda Lagoon and surrounding properties are also regulated by the City's Aqua Hedionda
Land Use Plan and Local Coastal Program (LCP) (1982). The LCP identifies the lagoon as
supporting water quality, viewshed, public use, and biological values that require protection.
The proposed project is located within the City of Carlsbad, which has a Habitat Management Plan
(HMP) q>proved in 2004, to guide biological resource planning, protection and development within
the City in conformance with the NCCP. Based on proposed development and biological resources,
hard arid soft line Focus Plarining Areas (FPA) are designated in the HMP. Hard line areas generally
require 100% conservation and soft line areas generally require specific conservation standards to be
implonented during development review. The proposed project lies mostiy within the hardline FPA
(Figure 4). The project study corridor contains several habitat ^es considered sensitive by the
HMP: intertidal mudflats, intertidal rocky beach, open water, disturbed southem willow scrab,
southon coastal salt marsh and coastal sage scrab. Sensitive species found within the study area
which are covered under the HMP include Califomia gnatcatcher and salt marsh skipper. As a public
infi'astracture project within the proposed FPA, the HMP allows for impacts to covered habitats and
species but also requires mitigation.
IMPACTS ANALYSIS
The project involves realigning the existing westem segment ofthe NAHI with a new foreernain
pipeline. The carrier pipeline would be constructed of thick wall High Daisity Polyethylene (HDPE)
with heat fused (welded) joints, or bell and spigot PVC, dependent on constraction methods selected
by the Contractor. Total pipeline length would be approximately 2,257 linear feet. The Proposed
gravity pipeline will be installed using both conventional trenching methods and micro-turmeling
constraction methods (Figi/re 5).
The various components of the project include: staging, trenching, microtunnelling, and
establishment of a section of non-improved new access road. Once constraction has been completed,
DUDEK 4775-05
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Re: Biological Resources Letter Report, NAHI Westem Segment Realignment Project
the existing westem segment of the NAHI will be abandoned in place. All aspects of the project are
incorporated into the Constraction Footprint and considered a direct impact with the exception of
areas that are microtuimel only and non-improved access used for constraction (Figures 6A-E).
The microtunnel only areas will have no ground disturbance during constraction and the presence of
the underground pipe below the surfece will not affect the viabihty of vegetation or habitat
conditions and therefore no impacts would occur.
Constraction access would utilize the existing compacted sandy base. Given that no material is
being deposited, no stractures are bemg built, and future traffic will be uncommon, this aspect of the
project would not alter current environmental conditions in that area.
Proposed staging area B is depicted rn Figure 6D as it is described in the temporary constraction
easement for the project Howeverj constraction plans and Mitigation Monitoring and Reporting
Plan (MMRP) for the project will note that additional resource avoidance is necessary in this area
due to the presence of coastal sage scrab. AU direct impacts to coastal sage scrab (including
disturbed forms) within staging area B will be avoided during constraction through the placement of
temporary fencing and monitoring by a qualified biologist The project design feature will ensure
that the project results in no impacts to ESHA.
Direct Impacts
Implementation ofthe proposed project would result in impacts to vegetation communities and land
cover types Usted in Table 2. No direct impacts to jurisdictional waters would occur as a result of
the project
Regarding sensitive plant and wildlife species, the project avoids impacts to all knoWn sensitive
plant and wildlife species locations as well as suitable habitat areas. Therefore, no direct impacts to
sensitive plant or wildlife species would occur.
Indirect Impacts
Indirect impacts to vegetation communities and waters fi-om the proposed project primarily would
result fiom adverse constraction-related "edge effects" that may include dust, soil erosion, pollution,
siltation, and runoff. Most of the indirect impacts to vegetation communities and waters can also
affect sensitive wildlife. In addition, short-term noise during constraction has the potential to affect
wildUfe activity including bird breeding behavior.
DUDEK 4775^5
7 May 2007
Mr. Mark Biskup
Re: Biological Resources Letter Report, NAHI Western Segment
'. • '] • TABLE 2
IMPACTS TO VEGETATION COMMUNITIES & LAND COVER TYPES
Annual Gras^and
Co^SaRM^ 0.00
[Ksturbed Co^td Salt Marsh 0.00
C(^£dSageS(7yb 0.00
Dsturbed Coastal Sage Scrub 0.00
Developed Land 0.22 ,
Deyek^ Land-Jurisdictional 0.00
[MrrbedLand N • • . ,c ;r.26•-
EiN^^tus Woodland 0.00
Interftld Mudflat 0.00
Interfidd Rocky Beach 0.00
Ornamental Rantings 0.01
Open Water 0.00
C^hirbed Southem Willow Scmb 0.00
SIGNIFICANCE/MITIGATION
i
Direct impacts to disturbed land, developed land, and omamental plantings are not considered
sigriificant due to the lack of native species utilizing these land cover types.
The indirect;short-term impacts of dust, soil erosion, pollution, siltation, runoff, and noise firom
coiistraction activiti^ are significant to vegetation communities, jurisdictional waters, and sensitive
wildlife. These impacts may be mitigated by the implementation of a Best Management Practices
(BMP) plan approved by the City that may include the use of silt fencing, straw bales, gravel bags,
and stabilized constraction aitrances prior to constraction. Noise related impacts to sensitive
breeding birds including the Califomia gnatcatcher may be mitigated by avoiding constraction
activities during the breeding season or by the maintenance of rioise levels below 60 dBA Leq at
occupied nest locations of sraisitive species. The maintenance of appropriate noise levels would be
confirmed through nesting bird surveys to determine the presence of sensitive nesting birds within
500 feet of the project constraction and noise measurements at nest locations during peak
constraction activity by a qualified acoustician.
DUDEK 4775-05
May 2007
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Re: Biolo^cal Resources Letter Report, NAHI Westem Segment Realignment Project
HMP COMPLIANCE
The proposed project is compliant with the HMP as it would avoid direct impacts to covered species
and habitat With the implementation mitigation measures for indirect impacts, no resources covered
by the HMP would be affected by implementation of the project.
If you have any questions or comments, please do not hesitate to coritact me at (760) 479-4284.
Very truly yours.
^ipul
Biologist
AtL Figures 1 — 6
cc: Pam Drew. Gty of Carbbad
John Poneous, Dudek
Russ Berhok, Dudek
LITERATURE CITED
Bond, S.L 1977. Annotated List of the Mammals bf San Diego County, Califomia. Trans. San
Diego Soc. Nat Hist. 18:229-248.
Califomia Department of Fish and Game, Natural Diversity Data Base (CDFG). 2006a. Rarefind.
Version 3.0.5. Computer database. March 3,2006.
Califomia Department of Fish and Game, Natural Diversity Data Base (CDFG). 2006b. Special
Animals. Biannual publication, miriieo. Febmary 2006. 55 pp.
Califomia Department ofFish and Game, Natural Diversity Data Base (CDFG). 2006c. Special
Vascular Plants, Bryophytes, and Lichens List. Biannual publication, mimeo. May2006. 96
pp.
Califomia Native Plant Society (CNPS). 2006. Inventory of Rare and Endangered Plants (online
edition, v7-06b 4-18-06). Califomia Native Plant Society. Sacramento, CA.
DUDEK 4775-05
9 May 2007
Mr. Mark Biskup
Re: Biological Resources Letter Report, NAHI Westem Segment Realignment Project
Carlsbad, City of2005. Habitat Management Plan (HMP). Carlsbad, CA:
Dudek 2004. Biological Resources Technical Report for tiie NAHI Westem Segment Maintenance
Access Road, and Shoreline Stabilization Project. Encinitas, CA.
Ehrlich, P.R. 1988. The Birder's Handbook: a Field Guide to tiie Natural History of North
American Birds. Simon and Schuster, Fireside, New York, New York.
Emmel, T.C. and J.F. Emmel. 1973. The Butterflies of Soutiiem California. Natural History
Museum of Los Angeles County, Science Series 26:1-148.
Garrett, K. and J.Durm. 1981. Birdsof Southem Califomia: Status and Distribution. LosAngeles
Audubon Sodety, Los Angeles, California.
SANDAG (San Diego Association of Governments). 2001 Multiple Habitat Conservation Program.
CD-ROM
Stebbins, R.C. 1985. A Field Guide to Westem Reptiles and Amphibians. Houghton MifiQin Co.,
Boston, Mass.
United States Fish and Wildlife Service (USFWS). 2006. Endangered and Threatened Wildlife and
Plants; Review ofNative Species that are Candidates or Proposed for Listing as Endangered
or Threatened; Annual Notice of Findings on Recycled Petitions; Annual Description of
Progress on Listing Actions. Federal Register 1\{\1€): 53756 - 53835.
Unitt, P. A. 1984. Birds of San Diego County. Memoir 13, San Diego Society of Natural History.
DUDEK 4775-05
10 May 2007
Orange
County
1* - 8 Miles
Tijiura
North Agua Hedionda Sewer Westem Segment Realignment Project
Biological Resources Letter Report
Regional Map
FIGURE
•it
J V
4 *v-
Legend
Proposed Realignment
Existing NAHI Western Segment
•^u « " ^
\SOURCE: USGS 7.5 ll/linut^Series, San Luis Rey Quadrangle
500 =iFeet
North Agua Hedionda Sewer Western Segment Realignment Project
Biological Resources Letter Report
Vicinity Map
FIGURE
mast BasiB BMII KM tmd^wam lalm wma ^^g'^^-''-'igi^^''^j^':'^^j^'
North Agua Hedionda Sewer Western Segment Realignment Project - Biological Resources Letter Report
\mfs\Mk ^'°'°9ical Resources & Jurisdictional Delineation Index Map
FIGURE
3A
VEGETATION TYPES/LANDCOVERS:
Annual Grassland AGL DH
CSM
CSS
DEV
Coastal Salt Marsh
Coastal Sage Scrub
Developed Land
EUC
IM
NOTE:
IRB
Disturbed Habitat
Eucalyptus Woodland
Intertidal Mudflat
Intertidal Rocky Beach
^Zl^lf' Vt ^'^'''^^'^ ^ that It is disturbed. An upper case J fonawlng a vegetation type designator Indicates U»t It is Jurls^rtional
71
f ••-»;/ Waters of the as.
(Number Indicates width of unoegetated channel.)
Data Station
SENSmVE ANIMAL SPECIES:
CAGNOf CaUfomia gnatcatcher (Dudek, 2001)
CAGH07 CaUfomia gnatcatcher (Dudek, 2007)
SMS SaU marsh skipper (Dudek, 2003)
BASE PHOTO SOURCE: CITY OF CARISBAD
SEWER SYSTEM SOURCE: CITY OF CARISBAD GIS DEPT. (ADJUSTED TO TOPOGRAPHIC FEATURESI
ORN
OW
SWS
Ornamental
Open Water
Southem Willow Scmb
Study Area
Existing Sewer System
CAGN General Area of
Calling/Movement (2001)
SENSITn/E PLANT SPECIES;
Ac Adolphia califomica
Ja Juncus acutus ssp. leopoldU
NOTE: Number Indicates individual plant
counts at that location.
North Aoua Hedionda Sewer Western Segn»nt Realignn»nt Project - Biologicl Resources Letter Report
Biological Resources & Jurisdictional Delineation Map
North Agua Hedionda Sewer Western Segment Realignment Project - Biological Resources Letter Report
Biological Resources & Jurisdictional Delineation Map
FIGURE
3C
North Ague Hedionda Sewer Western Segment Realignment Project • Biological Resources Utter Report
Biological Resources & Jurisdictional Delineation Map
North Agua Hedionda Sewer Western Segment Realignment Project - Biological Resources Letter Report
Biological Resources & Jurisdictional Delineation Map
FIGURE
3E
Feet North Agua Hedionda Sewer Western Segment Realignment Project • Biological Resources Letter Report
Regional Vegetation & Species and Proposed FPA Hard/Soft Lines Map
FIGURE
4
AERIAL SOURCE: AIRPHOTO USA, JAN 2006
Legend
O Proposed Access Holes
Proposed Access Hole Rehabilitation
Relocated NAHI using Conventional Open Trench
Relocated NAHI using Microtunneling
Proposed Sewer Lateral
(Reconnect existing lateral and provide new
lateral stub connection using conventional
open trench construction)
Microtunneling Pit Area
I Staging Area
Proposed Non-improved Sewer Access Road
Existing Sewer System
Existing Sewer Easement
Existing Property Lines BEST ORIGINAL
North Agua Hedionda Sewer Western Segment Realignment Project • Biological Resources Letter Report
Project Components
FIGURE
.'V,.
—>4
^SEE iFIGURE 6B FOR iibtbScAL RESOURCES LEGEND
North Agua Hedionda Sewer Westem Segment Realignment Project - Biological Resources Letter Report
Biological Resources & Jurisdictional Delination Map
with Construction Footprint & Non-Improved Access Road Impacts
VEGETATION TYPES/LANDCOVERS:
Annual Grassland AGL DH
CSM
CSS
DEV
Coastal Salt Marsh
Coastal Sage Scmb
Developed Land
Eac
IM
IRB
Disturbed Habitat
Eucalyptus Woodland
Intertidal Mudflat
Intertidal Rocky Beach
NOTE: A lower case'd* In front of a vegetation type designator Indicates that It is disturbed.
An upper case J following a vegetation lype designator Indicates Uiat K is Jurisdictional.
TV Waters of the U. S.
(Fiumber Indicates width of unvegetated
cfiarmeL)
Data Station
Relocated
Conventional Open Trench
Relocated Microtunneling
Microtunneling Pit Area
Staging Area
SENSITIVE ANIMAL SPECIES:
CAGNOf CaUfomia gnatcatcher (Dudek, 2001)
CAGN07 CaUfomia gnatcatcher (Dudek, 2007)
SMS SaU marsh skipper (Dudek, 2003)
BASE PHOTO SOURCE: CITY OF CARISBAD
SEWER SYSTEM SOURCE: CITY OF CARISBAD GIS DEPT. (ADJUSTED TO TOPOGRAPHIC FEATURES)
ORN
OW
SWS
1^
Omamental
Open Water
Southem Willow Scmb
Study Area
Constmction Footprint
Impact
Proposed Non-Improved
Access Road Impact
Proposed Sewer Lateral
Existing Sewer System
CAGN General Area of
Calling/Movement (2001)
SENSITIVE PLANT SPECIES:
Ac Adolphia califomica
Ja Juncus acutus ssp. leopoldU
NOTE: Number indicates indhridual plant
counts at that location.
North Agua Hedionda Sewer Western Segment Realignment Project • Biological Resources Letter Report
Biological Resources & Jurisdictional Delination Map
with Construction Footprint & Non-Improved Access Road Impacts
North Agua Hedionda Sewer Western Segment Realignment Project • Biological Resources Letter Report
Biological Resources & Jurisdictional Delination Map
with Construction Footprint & Non-Improved Access Road Impacts
FIGURE
6C
I SEE FIGURE 6B FOR BIOLOGICAL
I RESOURCES LEGEND
I
North Agua Hedionda Sewer Western Segment Realignment Project • Biological Resources Letter Report
Biological Resources & Jurisdictional Delination Map
with Construction Footprint & Non-improved Access Road Impacts
FIGURE
60
I SEE FIGURE 6B FOR BIOLOGICAL
I RESOURCES LEGEND
I
160
SCALE IN FEET
North Agua Hedionda Sewer Western Segment Realignment Project • Biological Resources Letter Report
Biological Resources & Jurisdictional Delination Map
with Construction Footprint & Non-Improved Access Road Impacts
FIGURE
6E
APPENDIX A
CUMULATIVE LIST OF PLANT SPECIES OBSERVED ONSITE
VASCULAR PLANT SPECIES
ANGIOSPERMAE (DICOTYLEDONES)
ACANTHACEAE - ACANTHUS FAMILY
* Thunbergia alata - black-eyed susan vine
AIZOACEAE - CARPET-WEED FAMILY
* Aptenia cordifolia - aptenia
* Carpobrotus edulis - Hottentot-fig
* Mesembryanthemum crystallinum - crystal ice plsoit
* Mesembryanthemum nodiflomm - sea-fig
AMARANTHACEAE - AMARANTH FAMILY
Amaranthus blitoides - prostrate amaranth
ANACARDIACEAE - SUMAC FAMILY
Malosma Icmrina - laurel sumac
Rhus integrifolia - lemonadebeny
Rhus ovata - sugar bush
Toxicodendron diversilobum - poison-oak
APIACEAE - CARROT FAMILY
* Foeniculum vulgare - sweet fennel
APOCYNACEAE - DOGBANE FAMILY
* Nerium oleander - oleander
ASTERACEAE - SUNFLOWER FAMILY
Ambrosia confertifolia - weak-leaved burweed
Ambrosia psilostachya var. califomica - westem ragweed
Artemisia califomica - coastal sagebrush
Artemisia douglasiana - Califomia mugwort
Baccharis pilularis - coyote brush
Baccharis salicifolia - mule fat
Baccharis sarothroides - broom baccharis
* Conyza canadensis - horseweed
* Chrysanthemum coronarium - garland chrysanthemum
DUDEK 477W)5
A-1 May2007
APPENDIXA
CUMULATIVE UST OF PLANT SPECIES OBSERVED ONSITE
Encelia califomica California encelia
£Hcawienfl er/cozVfes - heather goldenbush
i^f/ogo anzomca - Arizona filago
* Fi/flgoga/Z/ca-nanow-leaf filago
Gnaphalium bicolor-\Aco\or cudweed
Grindelia campomm-g}jm plant
Hazardia squarrosa - saw-toothed goldenbush
* /fe</(jJ/Jo/j cre//ca - Crete hedypnois
Hemizonia fasciculata- fascicled tarweed
Heterotheca grandifiord - telegraph weed
Isocoma menziesii ssp. veneta - coastal goldenbush
Jaumea camosa salty susan
Lessingiajilaginifolia - virgate cudweed aster
Pluchea odorata ^ nmsh-Heabane
* Picris echioides-hnsAyox-tongae
* Senecio mikanioides - German ivy
* 5b/icAuy oyper - priddy sow-thistle
* Sonchus sp. - sow thistle
Xanthium strumarium - cocklebur
BORAGINACEAE - BORAGE FAMILY
Heliotropium curassavicum - wild heliotrope
BRASSICACEAE - MUSTARD FAMILY
* .firasj/ca wgra - black mustard
* Cakile tnaritima - sea rocket
Lepidium sp. - pepp^grass
* Raphanus sativus - wild radish
CACTACEAE - CACTUS FAMILY
* Opuntia fieus-ihdica - hidian fig
Opuntia littoralis - coastal prickly-pear
Opuntia prolifera - coast cholla
CAPPARACEAE - CAPER FAMILY
Isomeris arborea - bladderpod
DUDEK 4775-05
A-2 IWay2007
APPENDIXA
CUMULATIVE LIST OF PLANT SPECIES OBSERVED ONSITE
CARYOPHYLLACEAE - PINK FAMILY
* Spergularia bocconii - sand-spxtrrey
CHENOPODUCEAE - GOOSEFOOT FAMILY
Atriplex lentiformis- big saltbush, quail brush
Atriplex pacifica - south coast saltbush
Atriplex patula - spear oracle
* .<4/nip/ei5e7W/7>acca/a-Australian saltbush
Atriplex triangularis - spearscale
* Bassia hyssopifolia - ^ve-hookedhassia
* Chenopodium ambrosioides-Meidcan tea
* Chenopodium murale - nettle-leaved goosefoot
Salicomia subterminalis - Parish's pickleweed
51a//Gorn/a vi>;g/mca - common pickleweed
* Salsola tragus - Russian-thistle
Suaeda califomica - Califomia sea-bhte
CONVOLVULACEAE - MORNING-GLORY FAMILY
Calystegia macrostegia - westem bindweed
Cressa truxillensis - alkali weed
CRASSULACEAE - STONECROP FAMILY
Crassula argentea-jade plant
Dudleya pulvemlenta - chalk dudleya
CUSCUTACEAE - DODDER FAMILY
Cuscuta salina - salt marsh dodder
EUPHORBIACEAE - SPURGE FAMILY
Chamaesyce sp. - spurge
* Ricimis cornmunis - castor-bean
FABACEAE - PEA FAMILY
Lotus scoparius - deerweed
* Medicago polymorpha - Califonnahvtrclover
DUDEK
.•.•.•'•'"*;..•'•• ^ , •'. A-3 . May2007
APPENDIXA
CUMULATIVE LIST OF PLANT SPECIES OBSERVED ONSITE
FRANKENIACEAE - FRANKENIA FAMILY
Frankenia salina - alkali-heath
GERANIACEAE - GERANIUM FAMILY
* £r<MAum sp. - filaree
HYDROPHYLLACEAE - WATERLEAF FAMILY
Eriodictypn crassifolium - yerba santa
LAMUCEAE-MINT FAMILY
* Marrubium vulgare - horehound
Salvia mellifera - black sage
MALVACEAE - MALLOW FAMILY
Malocothamnus fasciculatus - mesa bushmallow
* Malva parviflora - cheeseweed
Mahella leprosa - alkali-mallow
MYOPORACEAE - MYOPORUM FAMILY
* Myoporum laetum - myoponmi
MYRTACEAE - MYRTLE FAMILY
* Eucalyptus sp. - eucalyptus
OXALIDACEAE - WOOD-SORREL FAMILY
* Oxalis pes-caprae - Bermuda buttercup
PLANTAGINACEAE - PLANTAIN FAMILY
Plantago erecta - dot-seed plantain
PLATANACEAE - SYCAMORE FAMILY
Platartus racemosa - westem sycamore
PLUMBAGINACEAE - LEADWORT FAMILY
* LimoniuTh perezii - statice
DUDEK 4775-05
A-4 May2007
APPENDIXA
CUMULATIVE UST OF PLANT SPECIES OBSERVED ONSITE
POLYGONACEAE - BUOCWHEAT FAMILY
.£WogowM/n jJwc/cj/Aift/m - California buckwheat
* .^Mwcccmpus-cuilydock
PRIMULACEAE - PRIMROSE FAMILY
* -<4/jaga//is an'ewiyir - scarlet pimpernel
RUBIACEAE - MADDER FAMILY
Galium angustifolium - narrow-leaved bedstraw
SALICACEAE-WILLOW FAMILY
PopM/uj^eTwow/ii-Remonfs cottonwood
5!a/ix exigva - narrow-leaved willow
Salix gooddingii var. gooddingii ^ black willow
Salix lasiolepis var, bracelinae - arroyo willow
SAURURACEAE - LIZARD'S-TAIL FAMILY
Anemopsis califomica - yaba mansa
SOLANACEAE - NIGHTSHADE FAMILY
* Datura wrightii - westem jimsonweed
Zycium ca/j^rw/cMiJ!-Califomia box-thom
* Mco/ifl/ifl^/aMca-tree tobacco
TAMARICACEAE - TAMARISK FAMILY
* jTa/womsp.-tamarisk
URTICACEAE - NETTLE FAMILY
Urtica dioica - giant creek nettle
ZYGOPHYLLACEAE - CALTROP FAMILY
* Tribulus terrestris - puncture vine
ANGIOSPERMAE (MONOCOTYLEDONES)
ARECACEAE - PALM FAMILY
* Washingtonia robusta - fan palm
DUDEK
APPENDIXA
CUMULATIVE LIST OF PLANT SPECIES OBSERVED ONSITE
CYPERACEAE - SEDGE FAMILY
* Cyperus involucrahts - umbrella sedge
Eleocharis sp. - ^»ke-rush
Scirpus acutus - hard-stemmed buhush
Scirpus maritimus - prairie bulrush
Scirpus robustus - Pacific coast buhush
JUNCACEAE - RUSH FAMILY
Juncus acutus - spiny rush
^/icus ^2{^/jn/5 - toad rush
LILUCEAE - LILY FAMILY
Agave americana - no common name
Chlorogalumpomeridiamim - soap plant
Lilium sp. - lily
Yucca schidigera - Mohave yucca
POACEAE - GRASS FAMILY
* Arundo donax - giant reed
* Avena barbata - sloider wild oat
* Bromus diandrus - ripgut grass
* Bromus hordeaceus - SO&. chess
* Bromus madritensis ssp. rubens - foxtail chess
* (^rtaikria seiloana - pampas-grass
* Cynodon dactylon-BemxudsL gcass
Distichlis spicata - salt grass
Hordeum sp. - barley
* Lolium multiflomm - Engli^ ryegrass
Nassella pulchra - purple needlegrass
* Paspalum dilatatum - dallis grass
* Poa sp. - bluegrass
* Pofypogon monspeliensis - rabbit's-foot grass
* Vulpia myuros - ratlail fescue
TYPHACEAE - CATTAIL FAMILY
Typha angustifolia - narrow-leaved cattail
lypha latifolia - broad-leaved cattail
DUDEK
. A6 . 4775^5
May 2007
APPENDIXA
CUMULATIVE LIST OF PLANT SPECIES OBSERVED ONSITE
ZOSTERACEAE - EEL-GRASS FAMILY
Zostera marina - eel-grass
* signifies introduced (non-native) species
DUDEK
A-7 4775-05
May 2007
APPENDIX B
CUMULATIVE LIST OF WILDLIFE SPECIES OBSERVED ONSITE
WILDLIFE SPECIES -INVERTEBRATES
CLASS CRUSTACEA - BARNACLES, BEACH HOPPERS, SHRIMPS, LOBSTERS,
CRABS, ETC.
Balanus glandula - bamacle
Hemigrapsus oregonensis - mud-flat crab
CLASS GASTROPODA - SNAILS, LIMPETS, SEA HARES, NUDIBRANCHS, ETC.
Collisella digitalis-Gngeredlimpet
Collisella scabra - ro\i0ilunpet
Littorina sp. (probably L. scutulata)-periwinkle species
Lottia gigantea - giant owl limpet
Tegula funebralis - black tegula
CLASS BIVALVIA - CLAMS, COCKLES, MUSSELS, OYSTERS, SHIPWORMS, ETC.
Mytilus edulis - blue mussel
Ostrea lurida - Pacific oyster
Tagelus subteres - razor clam
Argopecten aequisulcatus - speckled scallop
Tresus nuttalli - gaper clam
BUTTERFLIES AND MOTHS
HESPERIIDAE - SKIPPERS
Hylephila phyleus - fieiy skipper
Panoquina errans - salt marsh skipper
PIERIDAE - WHITES AND SULFURS
Pieris rapae - cabbage butterfly
LYCAENIDAE - BLUES, HAIRSTREAKS, & COPPERS
Brephidium exile - pygmy blue
Leptotes marina - marine blue
Blue species
DUDEK 477««
B-1 May2007
APPENDIX B
CUMULATIVE UST OF WILDLIFE SPECIES OBSERVED ONSITE
I:
NYMPHALIDAE - BRUSH-FOOTED BUTTERFLIES
Vanessa annabella - west coast lady
Junonia coenia-buckeye
WILDLIFE SPECIES -VERTEBRATES
REPTILES
IGUANIDAE - IGUANH) LIZARDS
Wa j/anjfci/na/ia - side-blotched lizard
BIRDS
PODICIPEDIDAE - GREBES
Podiceps nigricollis - eared grebe
Podilymbus podiceps - pied^billed grebe
ANATIDAE - WATERFOWL
Bucephala albeola - bufflehead
PELECAMODAE - PELICANS
Pelecanus occidentalis - brown pelican
ARDEIDAE - EIERONS
Ardea herodias - great blue heron
Casmerodius albus - great egret
RALLIDAE - RAILS & GALLINULES
Fulica americana - American coot
CHARADRHDAE - PLOVERS
Charadrius vociferus - killdeer
Pluvialis squatarola-black-belMed plover
SCOLOPACIDAE - SANDPIPERS
Calidris alpine—dunlin
Calidris minutilla - least sandpiper
DUDEK
B-2 477S05
May2007 i
I
APPENDIX B
CUMULATIVE LjST OF WILDLIFE SPECIES OBSERVED ONSITE
.(4c/irii macu/ana -spotted sandpiper
Calidris mauri - westem sandpiper
Catoptrophorus semipalmatus — willet
Limosa fedoa - marbled godwit
Numenius americanus - long-billed curlew
Numenius phaeopus - whimbrel
LARIDAE - GULLS & TERNS
Larus occidentalis-v/estem gall
Larus califomicus :-' <2aMorrda gall
Sterna caspia- Caspitea tem
Sterna forsteri-Torstei'stem
ACCIPITRIDAE - HAWKS
Buteo jamaicensis ^ red^tailed hawk
FALCONIDAE - FALCONS
Falco sparverius - American kestrel
PHASIANIDAE - PHEASANTS & QUAILS
Callipepla califomica - CaUfomia quail
COLUMBIDAE - PIGEONS & DOVES
Columba livia-rockdove
Zenaida macroura - mourning dove
TROCHILIDAE - HUMMINGBIRDS
Calypte anna - Annans hummingbird
Calypte costae - Costa's hummingbird
TYRANNIDAE - TYRANT FLYCATCHERS
Sayomis nigricans - black phoebe
Sayomis soya - Say's phoebe
Tyrannus verticalis - westem kingbird
Tyrannus vociferans - Cassin's kingbird
DUDEK 4775-05
fc7
B-3 May 2007
APPENDIX B
CUMULATIVE LIST OF WILDLIFE SPECIES OBSERVEd ONSITE
HIRUNDINIDAE - SWALLOWS
Hirundo pynhonota-cliff swallow
CORVIDAE - JAYS & CROWS
Aphelocoma coenilescais - scrab jay
Corvus braeh)^hynchos - American crow
AEGITHALIDAE - BUSHTITS
Psaltriparus minirmis-bnshtit
TROGLODYTIDAE-WRENS
Thryomanes bewickii-Bewick's wren
MUSCICAPIDAE - KINGLETS, GNATCATCHERS, THRUSHES & BABBLERS
PoUoptila califomica - Califomia gnatcatcher
MBVHDAE - THRASHERS
Mimus polyglottos - northem mockingbird
STURNIDAE - STARLINGS
* •S'/i/mu^ vi//gflm - European starling
PARULIDAE - WOOD WARBLERS
Z)e/ufro/ca corona/a - yellow-rumpai warbler
Geo//i/_)^is/>icAay - common yellowthroat
EMBERIZIDAE - SPARROWS
Melospiza melodia - song sparrow
PipUo crissalis - Califomia towhee
Pipilo maculatus - spotted towhee
Zo/io/ncA/Vi/ei/co/;Ar>'j - white-crowned sparrow
FRINGILLIDAE - FINCHES
Carpodacus mexicanus-house Gnch
Carduelis psaltria-lesser gold&ich
DUDEK
B-4^ 4775-05
May 2007
APPENDIXB
CUMULATIVE LIST OF WILDUFE SPECIES OBSERVED ONSITE
MAMMALS
LEPORIDAE - HARES & RABBITS
Syhnlagus bachmani - brush rabbit
GEOMYIDAE - POCKET GOPHERS
Thomomys bottae - Botta's pocket gopher
HETEROMYIDAE - POCKET MICE & KANGAROO RATS
Chaetodipus califomicus - Califomia pocket mouse,
CANIDAE - WOL VES & FOXES
* Canisfamiliaris - domestic dog
MUSTELIDAE - WEASELS, SKUNKS, & OTTERS
Mephitis mephitis - striped skunk
signifies introduced (non-native) species
DUDEK
4775-05
,-, - .. , . . ... ,May,2007
J
City of Carlsbad
North Agua Hediondia Interceptor
Project Schedule
ID Task Name
Final Design
Easement Acquisition
start Finish
20 days
60 days
Wed 12/5/07
Wed 12/5/07
Tue 1/1/08
Tue 2/26/08
Permitting
Advertise Project
Contract Review
Award Construction Contract
60 days
35 days
15 days
1 day?
Wed 12/5/07
Wed 4/2/08
Wed 5/21/08
Wed'e/11/08"
Tue 2/26/08
"Tuel/20/08
Tue 6/10/08
Wed 6/11/08
Construction
Notice to Proceed
Kicl<off Meeting
Material procurement
136 days?
' "l dayT
5 days
50 days
Thu 6/19/08 Thu 12/25/08
Thu 6/19/08
Fri 6/20/08
Fri 6/27/08'
Thu 6/19/08
Thu 6/26/08
Thu"'9/4/08
Construction Stal<ing 10 days
MIcrotunnelTing 70 days
Bore Pit Excavation 15 days
Hinge Point Excavation 20 days
Fri 8/22/08 Thu 9/4/08
Fri 9/5/08 Thu 12/11/08
Fri 9/5/08
Fri 9/5/08
Thu 9/25/08
thu 1072/08'
Microtunnelling 30 days Fri 10/3/08 Thu 11/13/08
"" 'Pipeline Assembly'anJlnstall " ' 10 days ' 'FTIT/14/08 thi7l'l/27/o'8
Accesshole Construction 10 days Fri 11 /28/08 Thu 12/11 /08
Pipe Realignment 45 days Fri 9/5/08 Thu 11/6/08
Pipe Trenching 15 days Fri 9/5/08 Thu 9/25/08
Pipeline Installation 10 days Fri 9/26/08 Thu 10/9/08
Accesshole Installation 10 days Fri 10/10/08 Thu 10/23/08
Backfill and Paving 10 days Fri 10/24/08 ' "thu 11'/6/68
Final Cleanup 10 days Fri 12/12/08 Thu 12/25/08
Hait 1. 2008 , ^ -
• [jl FlM lAlM JlJiAISlDlNlplj
Project: Project2
Dale: Wed 12/&07
Tasl^
Split
Progress
Milestone
Summary
Project Summary
External Tasks ]] Deadline ^
External Milestone ^
Page l
STATE OF CAUFORNIA-THE RESOURCES AGENCY • ' ARNOLD SCHWARZENEGGER, Gover/ior
CALIFORNIA COASTAL COMMISSION
SAN DIEGO COAST DISTRICT . . ' "
7575 METROPOUTAN DRIVE, SUITE 103
SANDIEGO,CA 92108-4421
(619) 767-2370 FAX (619) 767-2384
www.coastal.ca.gov
Page: ^
Date: February 15, 2008
IMPORTANT PUBLIC HEARING NOTICE
COASTAL PERMIT APPLICATION
PERMIT NUMBER: 6-07-092
APPLICANT(S): City of Carisbad, Attn: Mark Biskup
PROJECT DESCRIPTION:
The project involves relocating and rehabilitating an existing sewer pipline which has reached its
useful life. New sewer pipeline will be installed by utilizing 1,821 lineal feet of micro-tunneling
technique and approximately 436 lineal feet of conventional open trench construction, Additionaly 11
access holeswill be constructed in the new pipline alignment and 4 existing access holes will be
rehabilitated. All improvemnets will be at or below exisiting grade. A portion of the existing pipe will
remain and be abandoned in place.
PROJECT LOCATION:
North shore ,of Agua Hedionda between Cove Dr; and Hoover Dr,: Agua, Hedionda, Carlsbad (San
Diego County) (APN(s):206-^()P-;l 3, 206-200-12, 206-200-07, 206-200-06, 206-200-05, 206-200-04,
206-2d0'-b3?206'-20b-^^^ 206-172-07, 206-172-06, 206-172-05, 206-172-03, 206-172-04
?Q6-1i71a03):ar^;ir: ;-:.':-?.3i,iJ vti:-A\^.;: ^ ...
l^EARj^l6'DAfEi^NDtdcAT^ J'',."^-^ • • • '
PATE: , thurc^^^
TIME: Meeting begins at 9:00 AM
PLACE: Rancho Canada Golf Club ^
4860 Carmel Valley Road, Carmel, CA .
PHONE: (831)624-0111
HEARING PROCEDURES:
This item has been scheduled for a public hearing and vote. People wishing to testify on this matter
may appear at the hearing or may present their concerns by letter to the Commission on or before
the hearing date. The Coastal Commission is not equipped to receive comments on any official business
by electronic mail. Any information relating to official business should be sent to the appropriate
Commission office using U.S. Mail or courier service.
AVAILABILITY OF STAFF REPORT
A copy of the. staff,report pn this matter is available on the Coastal Commission's website at
httD://Www.coastal.ca.a6v/mtacurr html Alternatively, you may request a paper copy of the report from
•Toni Ross, Coastal Program Analyst, at the San Diego Coast District office.
SUBMISSION OF WRITTEN MATERIALS: :V'''J'^-ZZ^t'i^,''-^ . ; ; , r V ' ' '
If ydu yvish^'tq submit written materials for revievy by the Commission,, please observe the following
suggestions:.
. We request that you submit your materials to the Commission staff no later than three working days
before the hearing (staff will then distribute your materials to the Commission).
SSr CALIFORNIA COASTAL COMMISSION
Page: 2
Date: February 15, 2008
IMPORTANT PUBLIC HEARING NOTICE
COASTAL PERMIT APPLICATION
• Mark the agenda number of your item, the application number, your name and your position in favor
or opposition to the project on the upper right hand corner of the first page of your submission. If you do
not know the agenda number, contact the Commission staff person listed on page 2.
ft
• If you wish, you may obtain a current list of Commissioners' names and addresses from any of the
Commission's offices and mail the materials directly to the Commissioners. If you wish to submit
materials directly to Commissioners, we request that you mail the materials so that the Commissioners
receive the materials no later than Thursday of the week before the Commission meeting. Please mail
the same materials to all Commissioners, alternates for Commissioners, and the four non-voting
-members on ihe'Commission with a copy to th'e Commission "staff person listed on page 2.
• You are requested to summarize the reasons for your position in no more than two or three pages, if
possible. You may attach as many exhibits as you feel are necessary.
Please note: While you are not prohibited from doing so, you are discouraged from submitting written
materials to the Commission on the day of the hearing, unless they are visual aids, as it is more difficult
for the Commission to carefully consider late materials. The Commission requests that if you submit
written copies of comments to the Commission on the day of the hearing, that you provide 20 copies.
ALLOTTED TIME FOR TESTIMONY:
Oral testimony may be limited to 5 minutes or less for each speaker depending on the number of
persons wishing to be heard.
ADDITIONAL PROCEDURES:
The above item may be moved to the Consent Calendar for this Area by the Executive Director when,
prior to Commission consideration of the Consent Calendar, staff and the applicant are in agreement on
the staff recommendation. If this item is moved to the Consent Calendar, the Commission will either
approve it with the recommended actions in the staff report or remove the item from the Consent
Calendar by a vote of three or more Commissioners. If the item is removed, the public hearing
described above will still be held at the point in the meeting originally indicated on the'agenda.
No one"can predict'how quickly the Commission will complete agenda items or how many will be
postponed to a later date. The Commission begins each session at the time listed and considers
each item in order, except in extraordinary circumstances. Staff at the appropriate Commission
office can give you more information prior to the hearing date.
Questions regarding the report or the hearing should be directed to Toni Ross, Coastal Program Analyst,
at the San Diego Coast District office.