HomeMy WebLinkAbout3338; Agua Hedionda & Calavera Creek Dredging; Agua Hedionda Creek Dredge Turbity Control Plan; 2006-03-01TURBIDITY CONTROL PLAN
FOR THE
AGUA HEDIONDA CREEK EMERGENCY DREDGING PROJECT
CARLSBAD, CALIFORNIA
Prepared for:
California Regional Water Quality Control Board
9174 Sky Park Court, Suite 100
San Diego, California 92123
Attention: Christopher Means
(858)637-5581
Prepared by:
City of Carlsbad
1635 Faraday Avenue
Carlsbad, California 92008
Attention: David Hauser
March 2006
TABLE OF CONTENTS
Section Page
1.0 INTRODUCTION AND PURPOSE 1
1.1 Dredging Description 2
1.2 Goals and Objectives 2
1.3 Contact Information 2
1.4 Scheduling 4
2.0 WATER QUALITY PROTECTION 5
2.1 Protection Features 5
3.0 DREDGE MONITORING 9
3.1 Turbidity Monitoring 9
3.1.1 Measurement Identification Codes 9
3.1.2 Measurements 9
3.1.3 Preconstruction Monitoring 10
3.1.4 Dredge Monitoring 10
3.1.5 Postconstruction Monitoring 10
3.2 Compliance Assessment 11
4.0 REPORTING REQUIREMENTS 13
4.1 Compliance Statements 13
5.0 REFERENCES 15
APPENDICES
A Clean Water Act Section 401 Water Quality Certification 06C-007
B Figures
C Horiba U-10 Water Quality Multimeter Specifications
D Field Data Collection Log
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LIST OF TABLES
Table Page
1 Project Contacts, Agua Hedionda Creek Emergency Dredging Project 3
2 Project Description by Channel, Agua Hedionda Creek Channel Emergency
Dredging Activity 11
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1.0 INTRODUCTION AND PURPOSE
The City of Carlsbad (City) has recently been issued a Clean Water Act (CWA) Section 401
Water Quality Certification (401 Certification; 06C-007, see Appendix A) by the San Diego
Regional Water Quality Control Board (RWQCB) for conducting emergency flood-control
dredging in Agua Hedionda Creek in Carlsbad, California. Other environmental authorizations
issued by the U.S. Army Corps of Engineers and the California Department of Fish and Game
for this emergency maintenance work include:
• California Department of Fish and Game (CDFG) California Fish and Game Code Section
1602 Streambed Alteration Agreement Notification No. 1600-2006-0060-R5 (1602)
• U.S. Army Corps of Engineers (ACOE) 404 Individual Permit (200600151 -KJC)
As required by the 404 Permit and CDFG agreement, the emergency dredging activity must be
completed before March 15, 2006.
The channel dredging is being conducted under emergency circumstances to maintain adequate
flood protection for the residential community of Rancho Carlsbad, an existing residential
mobile home community located east of El Camino Real and south of Cannon Road, in the
northeastern section of Carlsbad, California (Appendix B, Figure 1). Over 50 percent of the
homes in Rancho Carlsbad reside within the existing limits of the 100-year floodplain and will
be subjected to flood damage during a major storm event if the previous channel capacity is not
regained. The limit of channel dredging is shown by the project boundary lines in Figure 1
(Appendix B).
Agua Hedionda Creek is a earthen channel watercourse that flows northwesterly through the
western portion of Rancho Carlsbad. The channel has historically been subject to significant
sedimentation. Due to increased peak discharge from development within the watershed and the
accumulation of up to 6 feet of sediment currently in the channel, the channel's storm water
conveyance capacity has been greatly diminished, which places approximately 278 Rancho
Carlsbad properties at risk.
The purpose of this Turbidity Control Plan (TCP) has been prepared to describe how turbidity
will be monitored during the emergency project in accordance with the 401 Certification.
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Various best management practices (BMPs) will be employed to control turbidity within the
project limits.
1.1 DREDGING DESCRIPTION
The total extent of the emergency dredging in Agua Hedionda Creek will span from the
downstream edge of the Cannon Road bridge to approximately 3,100 feet upstream
(Appendix B, Figure 1). As planned, dredging will be conducted in phases. The first phase will
involve tree removal within the channel and dredging between the El Camino Real and Cannon
Road bridges (bend area). The second phase will include Agua Hedionda Creek channel from
the El Camino Real bridge, working westward (upstream) to the southern boundary of Rancho
Carlsbad Drive (Appendix B, Figure 1); and dredging of Agua Hedionda Creek channel from El
Camino Real Bridge, to its confluence with Calaveras Creek. Refer to dredging methodology
information provided by the City for the RWQCB permit application packet, submitted on
February 2, 2006.
1.2 GOALS AND OBJECTIVES
The main goal of the emergency dredging is to maintain flood protection (for a 100-year return
frequency storm) by removing accumulated sediment and improving the capacity to convey
floodwaters safely.
The goal of this TCP is to describe appropriate BMPs that will minimize potential turbidity
impacts and establish a protocol for monitoring upstream and downstream turbidity levels during
active dredging in Agua Hedionda Creek, which would then be used to:
• Monitor BMP effectiveness and maximize water quality protection,
• Document hourly upstream and downstream turbidity measurements, and
• Determine compliance with 401 Certification requirements.
1.3 CONTACT INFORMATION
To promote communication between all involved parties, Table 1 provides contact information
relative to resource agencies, City employees, consultants, and contractors involved in
implementing this emergency project.
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Table 1
Project Contacts,
Agua Hedionda Creek Emergency Dredging Project
RESOURCE AGENCIES
U.S. Army Corps of Engineers, Los Angeles District
Regulatory Branch - San Diego Field Office
16885 W. Bernardo Drive, Suite 300-A
San Diego, California 92127
Regional Water Quality Control Board
San Diego Region
9174 Sky Park Court, Suite 100
San Diego, California 92123
California Department of Fish and Game
South Coast Region
4949 Viewridge Avenue
San Diego, California 92123
Kari Coler, Project Biologist
Tel: (858) 674-6783
Kari.j.coler@usace.army.mil
Chris Means, Environmental Scientist
Tel: (858) 637-5581
meanc@rb9.swrcb.ca.gov
Tamara Spear, Project Biologist
Tel: (858) 467-4223
tspear@dfg. ca. gov
LOCAL LEAD AGENCY
City of Carlsbad
1635 Faraday Avenue
Carlsbad, California 92008
David Hauser, Deputy City Engineer
Tel: (760) 602-2739
dhaus@ci.carlsbad.ca.us
Glen Van Peski, Project Manager
GVP Consultants
3764 Cavern Place
Carlsbad, CA 92010-6585
Tel: (760) 720-0500
gvanp@ci.carlsbad.ca.us
Glenn Pruim, City Engineer
Tel: (760) 602-2707
gprui@ci.carlsbad.ca.us
Marcela Escobar-Eck, Planning Director
Tel: (760) 602-4604
mesco@ci.carlsbad.ca.us
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PageS
CONSULTING TEAM
ED AW, Inc. (Environmental)
1420 Kettner Boulevard, Suite 620
San Diego, California 92101
Konecny Biological Services (Light Footed Clapper Rail
Surveys)
1501 East Grand Avenue, #2403
Escondido, California 92027
Marathon Construction (Dredging Contractor)
10108 Riverford Road
Lakeside, California 92040
Jacqueline Dompe, Principal in Charge
Tel: (619) 233-1454 ext. 323
dompej@edaw.com
Teresa Wilkinson, Senior Project Manager
Tel: (619) 233-1454 ext. 362
wilkinsont@edaw.com
Mark Williams, Senior Environmental Scientist
Tel: (619) 233-1454 ext. 367
williamsm@edaw.com
Jeff Warner, Environmental Analyst
Tel: (619) 233-1454 ext. 386
warnerj@edaw.com
John Konecny, Biologist
Tel: (760) 489-5276
jkonecny@nethere.com
Joe Ellis
Tel: (619) 276-4401
joe.ellis@marathonconstruction.biz
1.4 SCHEDULING
To avoid disturbing nearby sensitive birds during the breeding season, emergency dredging in
Agua Hedionda Creek will be completed by March 15, 2006 per the 404 permit Special
Condition l.a. and l.b., as well as CDFG Agreement Condition No. 12. Dredging activities are
anticipated to begin on March 6, following RWQCB approval of this TCP.
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2.0 WATER QUALITY PROTECTION
Water quality in Agua Hedionda Creek, as well as the sensitive downstream Agua Hedionda
Lagoon, will be protected to the maximum extent practicable through the implementation of a
variety of BMPs. The lagoon is listed on the CWA Section 303(d) list of Impaired Water Bodies
for sediment/siltation (and bacteria), and Agua Hedionda Creek is listed as impaired due to high
total dissolved totals. Accordingly, the City will incorporate a number of water quality
protection measures to minimize potential localized impacts and assist in protecting Agua
Hedionda Creek and the downstream lagoon. As discussed below, various BMPs will be
implemented to minimize impacts to water quality to the maximum extent practicable.
Protecting water quality within Agua Hedionda Creek will involve a variety of BMPs, as
described below.
2.1 PROTECTION FEATURES
Prior to any dredging work in the creek, BMPs for limiting turbidity and sediment dispersion will
be installed; the following steps are anticipated:
1. The upstream and downstream sections proposed for temporary check dam structures (see
below) will be surveyed for sensitive biological resources before installation. The footprint
alignment of the check dams will be modified as appropriate to avoid any sensitive
resources discovered. All temporary check dams will be constructed sufficiently from bank
to bank to avoid leakage or short-circuiting at the bank edges. This includes
accommodating for storm water runoff during the course of work.
2. A temporary sandbag check dam will be installed at the upstream end of the project (east of
Rancho Carlsbad Drive) to allow the construction of a diversion ditch and downstream
sediment-catchment system as described below. The dam structure will approximate a
wedge shape, with the vertical face upstream and the tapered, reinforced portion
downstream.
3. A gravel-bag check dam will be installed at the downstream end of the project boundary
(i.e., under the Cannon Road bridge). This check dam will be followed by two settling
ponds (Appendix B, Figure 2):
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a. The secondary settling pond will be constructed of at least three rows of gravel bags
around its perimeter. It will be keyed into the primary dam upstream to avoid short-
circuiting.
b. In the center of the top row, four or five of the gravel bags will be separated by 1 to 2
inches to provide a diffused release of detained water.
c. The tertiary settling pond will be constructed of at least two rows of gravel bags
around its perimeter. It will be keyed into the secondary dam upstream to avoid
short-circuiting.
d. The center two gravel bags on the top row of the tertiary settling pond will be
separated by 1 inch on each end (i.e., three small discharge relief slots) to provide a
diffused release to the creekbed below.
4. Create a diversion ditch along the bank of Agua Hedionda Creek to convey flow along the
toe of the bank and toward the settling ponds at the downstream end. The contractor may
choose which side to construct the diversion ditch relative to minimizing work interference.
a. A small berm will be constructed on the edge of the diversion ditch (opposite the
bank) to contain the flow over the anticipated range of water depths.
b. The diversion will be lined with heavy plastic and anchor it to the bank securely and
without tearing.
c. The lining will be allowed to cover to berm on the opposite side and place gravel bags
on and around the berm for anchoring. This diversion system will serve to keep water
out of the active dredging area.
5. A sedimentation trench will be created at lower limit of the project, upstream of the check
dam described in #3 above. An example plan view is provided in Figure 2 and a profile
view is shown in Figure 3 (see Appendix B).
6. The diversion ditch will be connected with the sedimentation trench (see Appendix B,
Figure 2).
7. The upstream check dam will be partially dismantled to allow water flow in the diversion
ditch only. The upstream dam will be bolstered to maintain structural integrity and
properly convey water into the diversion ditch only.
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a. Over the course of 1 to 2 hours, sandbags will be dismantled slowly to regulate a
controlled flow to the diversion ditch.
b. Any removed sandbags will be staged at one location on the adjacent bank for
readiness.
8. Once the water has filled the downstream sedimentation trench and clear water begins to
spill over the primary downstream check dam:
a. Two to three gravel bags will be removed from the top row in the center of the dam,
while standing on the downstream side of the dam. The bags will be stacked on the
top row but out of the flow line. A level sheet flow will be created at the discharge
point.
b. The secondary and tertiary settling ponds will be allowed to fill, and the clarity of the
spillover flow will be observed.
c. If outflow is not running clear, rows of gravel bags will be added to increase
detention volume and provide better dampening of the plunge pool.
d. If outflow from the tertiary settling pond is creating sediment disturbance of the
creekbed, gravel bags will be added directly underneath the outflow point(s) to
dissipate energy.
9. The entire diversion and check dam system will be inspected for integrity before
commencing dredging work. The area will be staked with yellow caution tape to avoid
unintentional damage.
10. Dredging will commence once the diversion system is stabilized.
11. The diversion system will be inspected twice daily (morning and evening) and make
necessary adjustments relative to any changes in water flow.
12. All check dam structures and materials used to control turbidity will be removed form the
creekbed once dredging is complete.
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3.0 DREDGE MONITORING
Monitoring of water quality in the vicinity of the Agua Hedionda Creek dredging project will
involve turbidity field measurements at pre-determined locations upstream of any dredging
activity and downstream of the project limits (Figure 1).
3.1 TURBIDITY MONITORING
During active dredging, turbidity monitoring will be conducted in accordance with the 401
Certification, which is discussed further below. Field logs will be kept for each day of
monitoring. These logs, along with the other compliance assessment materials (see Section 4.1),
will be forwarded to the RWQCB within 30 days of completing the emergency dredging activity.
3.1.1 Measurement Identification Codes
For each upstream and downstream turbidity measurement, unique measurement identifier codes
will be provided on field logs that can be correlated to date, time, and location of the measurement.
All turbidity measurements will be recorded in accordance with the following convention:
UP-031006-1300
Where:
UP = Upstream sampling location ("DN" shall designate downstream)
031006 = March 10, 2006 (mmddyy)
1300 = 1:00 p.m. (1100 = 11:00 a.m.)
3.1.2 Measurements
Turbidity monitoring during the emergency dredging will involve:
• Collecting water samples within the active flow for measuring turbidity onshore,
• Measuring creek velocity at the point of measurement, and
• Recording visual observations.
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For upstream and downstream monitoring locations (Figure 1), grab samples of creek water will be
collected, transferred to a calibrated container cup, and measured for turbidity via electronic
instrumentation (see Appendix C). Grab samples will be collected via a telescopic pole to avoid
water disturbance from foot traffic.
Collecting the grab sample will include:
• Placing a sampling cup in the center of the discharge flow;
• Collecting water just below the surface to avoid interference with underlying sediment; and
• Allowing the cup to fill while facing into the current.
To keep turbidity measurements consistent throughout each day, upstream recordings will be taken
on the hour, while downstream recordings will be taken on the half hour. This will allow time to
record observations, inspect BMPs, and travel to the next measurement location.
3.1.3 Preconstruction Monitoring
Prior to any site work, ambient turbidity measurements will be collected at several locations
along the Agua Hedionda Creek alignment to document preconstruction conditions (Figure 1).
3.1.4 Dredge Monitoring
Turbidity measurements during active dredging will be taken at upstream and downstream
project locations (Figure 1) hourly. Upstream measurements will be collected to the east of
Rancho Carlsbad Drive, and downstream measurements taken at the outflow point of the tertiary
settling pond.
3.1.5 Postconstruction Monitoring
As with preconstruction ambient turbidity monitoring, turbidity measurements will be repeated at
the same eight locations along the Agua Hedionda Creek channel to document postconstruction
conditions (Figure 1). Measurements will be taken approximately 72 hours following
demobilization.
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3.2 COMPLIANCE ASSESSMENT
Turbidity measurements recorded throughout the course of the Agua Hedionda emergency
dredging activity will be compared to the tolerance ranges specified in Condition B.I of the 401
Certification (Table 2).
Table 2
Project Description by Channel, Agua Hedionda Creek Channel
Emergency Dredging Activity
Background Turbidity
0-50 NTU
50-100NTU
Greater than 100 NTU
Maximum Increase
20% over background turbidity level
10 NTU
10% over background turbidity level
The data will be compiled, tabulated, and graphed for reporting with the compliance statement
(see Section 4.1).
During active dredging, should the downstream measurement exceed the maximum allowable
increase in turbidity, the water quality monitor will assess BMPs conditions and make
recommendations to the City and the contractor to immediately adjust, modify, or replace any
BMP (or component thereof) to prevent further exceedances of turbidity levels. Any such
remedial actions taken will be reported to the RWQCB within 2 working days.
After approximately 1 week and pending compliance with the turbidity limitations stated in
Table 2 above (and 401 Certification Condition B.I), the following schedule may be presented to
.the RWQCB for considering a possible amendment to the 401 Certification:
• Three times daily
o Measurements 1 hour after start of construction
o Midday measurements
o Measurements 1 hour before stop of construction
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Should these measurements continue to demonstrate compliance with 401 Certification
conditions, the monitoring schedule may be requested to:
• Twice daily
o Midday measurements
o Measurements 1 hour before stop of construction
Any such modifications to the 401 Certifications are contingent on RWQCB approval and the
issuance of a 401 Certification Amendment.
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4.0 REPORTING REQUIREMENTS
Reporting of water quality parameters will be consistent with RWQCB requirements (i.e., 401
Certification Condition B.3). A post-dredging water quality monitoring summary will be
prepared within 30 days of site demobilization.
Daily monitoring log forms (Appendix D) will be attached to show each measurement and set of
observations. At least one photograph will be taken each day at upstream and downstream
locations to visually document water quality conditions and BMP integrity. These photographs
will be included as attachment material to the final water quality monitoring report for the
project.
4.1 COMPLIANCE STATEMENTS
A statement of compliance with 401 Certification Condition B will be provided within the final
report. Turbidity measurements will be plotted relative to limitations (401 Certification B.I) for
compliance comparison. The statement will describe physical conditions, best management
practices, dredging dates, and a summary tabulation of turbidity measurements.
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5.0 REFERENCES
RWQCB (San Diego Regional Water Quality Control Board). 2006. Clean Water Act Section
401 Water Quality Certification and Waiver of Waste Discharge Requirements for
Discharge of Dredged and/or Fill Materials. Issued for the Agua Hedionda Channel
Dredging Project (File No. 06C-007). March 2.
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APPENDIX A
CLEAN WATER ACT SECTION 401
WATER QUALITY CERTIFICATION 06C-007
California Regional Water Quality Control Board
San Diego Region
"~^^~^^™^~~ Internet Address- httpK/7ww\rswrcb!ca!gov/nvqcb9/
Alan C. Lloyd Ph I) 9174 Sk Pafk c Suit£ ]00 San Di California 92123 AmnW ts^h^a^.™^™.^
5,rrew^/0r Phone (858) 467-2952 - FAX (858) 571-6972 Arnold SchwarzeneggerEnvironmental uovernor
Protection
Action on Request for
Clean Water Act Section 401 Water Quality Certification
and Waiver of Waste Discharge Requirements
for Discharge of Dredged and/or Fill Materials
PROJECT: Agua Hedionda Channel Dredging Project (File No. 06C-007)
APPLICANT: Mr. Glenn Pruim, Public Works Director
City of Carlsbad
1635 Faraday Avenue
Carlsbad, CA 92008
ACTION:
a Order for Low Impact Certification a Order for Denial of Certification
• Order for Technically-conditioned • Waiver of Waste Discharge
Certification Requirements
STANDARD CONDITIONS:
The following three standard conditions apply to all certification actions, except as noted under
Condition 3 for denials (Action 3).
1. This certification action is subject to modification or revocation upon administrative or
judicial review, including review and amendment pursuant to section 13330 of the California
Water Code and section 3867 of Title 23 of the California Code of Regulations (23 CCR).
2. This certification action is not intended and shall not be construed to apply to any discharge
from any activity involving a hydroelectric facility requiring a Federal Energy Regulatory
Commission (FERC) license or an amendment to a FERC license unless the pertinent
certification application was filed pursuant to 23 CCR subsection 3855(b) and the
application specifically identified that a FERC license or amendment to a FERC license for a
hydroelectric facility was being sought.
3. The validity of any non-denial certification action (Actions 1 and 2) shall be conditioned
upon total payment of the full fee required under 23 CCR section 3833, unless otherwise
stated in writing by the certifying agency.
California Environmental Protection Agency
The energy challenge facing California is real. Every Califomian needs to take immediate action to reduce energy consumption. For a list of
simple ways you can reduce demand and cut your energy costs, see our Web-site at http://www.swrcb.ca.gov.
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File No. 06C-007
ADDITIONAL CONDITIONS:
In addition to the three standard conditions, the City of Carlsbad shall satisfy the following:
A. GENERAL CONDITIONS
1. The City of Carlsbad shall, at all times, fully comply with the engineering plans,
specifications and technical reports submitted with this application for 401 Water Quality
Certification and all subsequent submittals required as part of this certification.
2. The City of Carlsbad shall maintain a copy of this certification at the project site so as to
be available at all times to site personnel and agencies.
3. Prior to the start of the project, the City of Carlsbad shall educate all personnel on the
requirements in this certification, pollution prevention measures, spill response, and best
management practices.
4. The City of Carlsbad shall permit the San Diego Regional Water Quality Control Board
(SDRWQCB) or its authorized representative at all times, upon presentation of
credentials:
a. Entry onto project premises, including all areas on which wetland fill or wetland
mitigation is located or in which records are kept.
b. Access to copy any records required to be kept under the terms and conditions of this
certification.
c. Inspection of any treatment equipment, monitoring equipment, or monitoring method
required by this certification.
5. The City of Carlsbad shall notify the SDRWQCB within 24 hours of any unauthorized
discharge to waters of the U.S. and/or State; measures that were implemented to stop and
contain the discharge; measures implemented to clean-up the discharge; the volume and
type of materials discharged and recovered; and additional BMPs or other measures that
will be implemented to prevent future discharges.
6. The City of Carlsbad shall, at all times, maintain appropriate types and sufficient quantities
of materials onsite to contain any spill or inadvertent release of materials that may cause a
condition of pollution or nuisance if the materials reached a waters of the U.S. and/or State.
7. The City of Carlsbad shall dispose of the dredge material at a contained upland location,
or provide a plan, including text description and figures, indicating how containment of
dredge materials will occur at all sites where dredge material may be stockpiled. The plan
shall include a delineation of all waters of the US/State within the vicinity of the
stockpiles. This plan will be provided to the SDRWQCB for review prior to initiating
dredging activities.
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File No. 06C-007
8. Dredge material shall not be deposited in a location that may cause significant adverse
effects to aquatic life, fish, or wildlife or may harm the beneficial uses of the receiving
waters.
9. This Certification is not transferable to any person except after notice to the Executive
Officer of the SDRWQCB. The applicant shall submit this notice in writing at least 30
days in advance of any proposed transfer. The notice must include a written agreement
between the existing and new owner containing a specific date for the transfer of this
Certification's responsibility and coverage between the current discharger and the new
discharger. This agreement shall include an acknowledgement that the existing owner is
liable for compliance and violations up to the transfer date and that the new owner is
liable from the transfer date on.
10. In the event of any violation or threatened violation of the conditions of this certification,
the violation or threatened violation shall be subject to any remedies, penalties, process or
sanctions as provided for under state law. For purposes of section 401(d) of the Clean
Water Act, the applicability of any state law authorizing remedies, penalties, process or
sanctions for the violation or threatened violation constitutes a limitation necessary to
assure compliance with the water quality standards and other pertinent requirements
incorporated into this certification.
11. In response to a suspected violation of any condition of this certification, the SDRWQCB
may require the holder of any permit or license subject to this certification to furnish,
under penalty of perjury, any technical or monitoring reports the Regional Board deems
appropriate, provided that the burden, including costs, of the reports shall be a reasonable
relationship to the need for the reports and the benefits to be obtained from the reports.
12. In response to any violation of the conditions of this certification, the SDRWQCB may
add to or modify the conditions of this certification as appropriate to ensure compliance.
13. This certification authorizes sediment removal activities only. This certification does not
authorize the construction of any structure within Agua Hedionda or Calavera Creek, nor
does it authorize any widening, armoring or realignment of any waters of the US/State.
B. TURBIDITY MONITORING PROGRAM
1. To ensure that the emergency dredging project does not adversely affect the beneficial
uses of Agua Hedionda Creek, the City of Carlsbad shall develop and implement a
Turbidity Monitoring Plan to measure turbidity levels above and below the dredging
project site. Turbidity monitoring shall continue until such a time that emergency
dredging activities have been completed. The turbidity monitoring program shall be
developed and submitted to the Regional Board for acceptance prior to initiation of
dredging. Hourly turbidity levels shall not exceed the following limits:
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File No. 06C-007
Background Turbidity
0-50 MTU
50-100 NTU
Greater than 100 NTU
Maximum Increase
20% over background turbidity
level
10 NTU
10% over background turbidity
level
2. The City of Carlsbad shall immediately assess the results of each sampling event, and if
the results of the downstream site exceed the maximum allowable increase in turbidity,
the City of Carlsbad shall conduct an immediate assessment of erosion and sediment
control best management practices being implemented on-site. The City of Carlsbad
shall:
a. Repair or replace any BMP that has failed.
b. Maintain any BMP that is not functioning properly due to lack of maintenance.
c. Evaluate whether additional or alternative BMPs should be implemented to
prevent further exceedences of turbidity levels.
d. Report to the Regional Board within 2 working days the actions taken to remedy
the situation.
3. The City of Carlsbad shall retain all turbidity monitoring data, and report the results of
the monitoring program to the SDRWQCB at the conclusion of dredging activities.
C. MITIGATION
1. Mitigation for permanent impacts to 0.8 acres of vegetated waters of the U.S. will be
achieved at a 3:1 ratio, consisting of the creation of 1.6 acres of wetlands within the
Carlsbad Hydrologic Unit, and the enhancement or restoration of 0.8 acres of wetlands
within the Carlsbad Hydrologic Unit.
2. Mitigation for temporary impacts to 4.2 acres, will be achieved at a 1:1 ratio, by the
enhancement of 4.2 acres of waters of the U.S./State within the Carlsbad Hydrologic
Unit.
3. Within 120 days of the issuance of this certification, the City of Carlsbad shall develop
and submit a Final Wetlands Mitigation and Monitoring Plan for SDRWQCB approval,
that shall be consistent with Conditions C.I and C.2 above, and shall achieve the
following performance standards:
a. Created wetlands that are installed to compensate for impacts to jurisdictional wetland
areas must posses the three criteria (wetland hydrology, hydrophytic vegetation, and
hydric soils) necessary to be delineated as a Corps jurisdictional area;
b. All mitigation sites shall be maintained 95 percent free of exotic/nonnative plant
species;
c. All mitigation sites must be self-sustaining; and
4 of 13
File No. 06C-007
d. All mitigation sites must exhibit evidence of natural recruitment of native wetland
and/or riparian species.
4. Implementation of mitigation shall provide the following functional gains:
a. Habitat function - Creation of structurally and spatially diverse habitat surrounding
riparian areas will provide nesting and foraging grounds for birds, amphibians, and
other wildlife.
b. Biogeochemical/water quality functions - Expansion of wetland areas shall increase
areas for natural water quality functions, such as microbial action that removes toxins,
nitrogen, and other nutrients from runoff.
c. Hydrologic functions - Expansion of wetland areas will allow greater flood flow
attenuation, energy dissipation, and storage during storm events.
5. The Final Wetlands Mitigation and Monitoring Plan shall include function-based success
criteria. Criteria may be based on Function-Based Performance Standards for Evaluating
the Success of Riparian and Depressional/Emergent Marsh Mitigation Sites (Prepared by
PCR Services Corporation for the U.S. Army Corps of Engineers, Los Angeles District;
1999), or equivalent functional analysis. Functional analysis shall include, but not be
limited to: structural diversity, coverage, and spatial density of habitat; percent of exotic
and invasive vegetation present; hydrologic regime of the riparian zone; hydrologic
support; saturation duration; micro and macro topographic complexity; and vegetation
roughness and organic carbon. Ultimate success of the mitigation areas will be
determined by the attainment of the target scores.
6. The Final Wetlands Mitigation and Monitoring Plan shall include construction plans and
specifications that include, but are not limited to, the following:
a. Proposed channel designs and earthwork for all mitigation areas, including
appropriate cross sections and plan views;
b. A detailed planting plan, including species lists, plant sizes and numbers, and planting
designs;
c. Detailed implementations schedule, including but not limited to, dates for initiation
and completion of mitigation installation at different on-site and off-site mitigation
areas, recordation of conservation easements; initiation of monitoring period;
reporting dates, etc.;
d. An irrigation plan;
e. Signage and barrier designs adequate to prevent intrusion into mitigation areas and
creek buffer zones;
f. Specific details regarding hydrologic and biogeochemical monitoring, including
function-based performance standards, sample locations, periodicity, and qualitative
and quantitative indicators; and
g. All other information, as appropriate.
7. No Later than 90 days after SDRWQCB acceptance of the Final Mitigation Plan, the City
of Carlsbad shall provide a draft preservation mechanism (e.g. deed restriction,
5 of 13
File No. 06C-007
conservation easement, etc.) that will protect all mitigation areas and their buffers in
perpetuity. The conservation easement or other legal limitation on the mitigation
property shall be adequate to demonstrate that the site will be maintained without future
development or encroachment on the site or which could otherwise reduce the functions
and values of the site for the variety of beneficial uses of waters of the U.S. that it
supports. The conservation easement or other appropriate legal limitation shall prohibit,
without exception, all residential, commercial, industrial, institutional, and transportation
development, and any other infrastructure development that would not maintain or
enhance the wetland functions and values of the site. Other infrastructure development to
be prohibited includes, but is not limited to, additional utility lines, paved maintenance
roads, and areas of maintained landscaping for recreation. The City of Carlsbad shall
submit proof of a completed preservation mechanism within one year of the submittal of
the draft preservation mechanism
8. The City of Carlsbad shall submit a report (including topography maps and planting
locations) to the SDRWQCB within 90 days of completion of mitigation site preparation
and planting, describing as-built status of the mitigation project. If the site grading and
planting are not completed within six weeks of each other, separate reports will be
submitted describing those specific as-built conditions.
9. The construction of proposed mitigation shall be completed within the same calendar year
as impacts occur, or at least no later than 9 months following the close of the calendar
year in which impacts first occur (e.g., if impacts occur in June 2006, construction of
mitigation for all impacts must be completed no later than September 2007).
10. Mitigation areas shall be maintained free of perennial exotic plant species including, but
not limited to, pampas grass, giant reed, tamarisk, sweet fennel, tree tobacco, castor bean,
and pepper tree. Annual exotic plant species shall not occupy more than 5 percent of the
onsite or offsite mitigation areas.
11. If at any time during the implementation and establishment of the mitigation area(s), and
prior to verification of meeting success criteria, a catastrophic natural event (e.g., fire,
flood) occurs and impacts the mitigation area, the City of Carlsbad be responsible for
repair and replanting of the damaged area(s).
12. Mitigation monitoring reports shall be submitted annually until mitigation has been
deemed successful. Monitoring reports shall be submitted no later than 30 days following
the end of the monitoring period. Monitoring reports shall include, but not be limited to,
the following:
a. Names, qualifications, and affiliations of the persons contributing to the report;
b. Tables presenting the raw data collected in the field as well as analyses of the
physical and biological data;
c. Qualitative and quantitative comparisons of current mitigation conditions with pre-
construction conditions and previous mitigation monitoring results;
d. Photodocumentation from established reference points;
6 of 13
File No. 06C-007
e. Survey report documenting boundaries of mitigation area; and
f. Other items specified in the draft and final Wetland and Riparian Mitigation and
Monitoring Plan.
13. For the purpose of determining enhancement mitigation credit for the removal of
exotic/invasive plant species, only the actual area occupied by exotic/invasive plant
species shall be quantified to comply with mitigation requirements.
14. For purposes of this certification, creation is defined as the creation of vegetated or
unvegetated waters of the U.S. where they have never been documented or known to
occur (e.g., conversion of nonnative grassland to freshwater marsh). Restoration is
defined as the creation of waters of the U.S. where they previously occurred (e.g.,
removal of fill material to restore a drainage). Enhancement is defined as modifying
existing waters of the U.S. to enhance functions and values (e.g., removal of exotic plant
species from jurisdictional areas and replacing with native species).
D. BENTHIC MACROINVERTEBRATE COMMUNITY ANALYSIS
1. The City of Carlsbad shall develop and implement a five-year Bioassessment Monitoring
program to evaluate changes in the benthic macroinvertebrate community in Agua
Hedionda Creek resulting from impacts of the dredging project and future planned flood
control projects.
2. Bioassessment monitoring and assessment using benthic macroinvertebrates shall be
performed using the Targeted Riffle Composite (TRC) method consistent with the latest
sampling and analysis methods in the Surface Water Ambient Monitoring Program
Quality Assurance Management Plan (SWAMP QAMP). *At a minimum, bioassessment
monitoring shall be performed at four sites (assessment stations) in Agua Hedionda Creek
(as flow permits) in May/June and October of each year. One assessment site shall be
located upstream of the dredging activity, one assessment site shall be located within the
dredged reach of Aqua Hedionda Creek, and one assessment site shall be located in a
reach of Agua Hedionda Creek downstream of the dredging activity. A control station
upstream of the project shall be located and sampled concurrently with the assessment
stations. Each assessment site and the control site sampled shall also be evaluated using
the core quantitative physical habitat assessment measures consistent with the latest
version of the SWAMP QAMP in addition to any additional measures required by the
SDRWQCB consistent with the SWAMP QAMP.
1 The SWAMP QAMP is being updated to include these procedures. Current copies of the QAMP may be found at
http://www.waterboards.ca.gov/swamp/qamp.html
7 of 13
File No. 06C-007
3. Results of the bioassessment monitoring for benthic macroinvertebrates shall be reported
using the Southern California Index of Biotic Integrity as described in Ode et al (2005)2
and shall include an evaluation of the assessment and control sites sampled in comparison
to at least one true reference site (least disturbed conditions) as sampled semi-annually in
the San Diego Region by the San Diego Co-Permittees per the most recent version of the
San Diego County Municipal Separate Storm Sewer System (MS4) NPDES permit
Receiving Waters Monitoring and Reporting Program.
4. The five-year Bioassessment Monitoring Program will begin concurrently with the habitat
mitigation program pursuant to Section C. of this certification. The bioassessment data
and analysis shall be submitted as part of the required habitat mitigation monitoring
reports pursuant to Condition C.12 of this certification.
5. The SDRWQCB Executive Officer may make revisions to the Bioassessment monitoring
program at any time during the five year monitoring term, and may include changes in
sampling or assessment methods, a reduction or increase in the number of locations
monitored, or the frequency of monitoring required
E. REPORTING
1. All information requested in this Certification is pursuant to California Water Code
(CWC) section 13267. Civil liability may be administratively imposed by the Regional
Board for failure to furnish requested information pursuant to CWC section 13268.
2. All applications, reports, or information submitted to the Regional Board shall be signed
and certified as follows:
"/ certify under penalty of law that I have personally examined and am familiar
with the information submitted in this document and all attachments and that,
based on my inquiry of those individuals immediately responsible for obtaining
the information, I believe that the information is true, accurate, and complete. I
am aware that there are significant penalties for submitting false information,
including the possibility of fine and imprisonment."
2 Ode, P., A. Rehn, J. May (2005). A Quantitative Tool for Assessing the Integrity of Southern Coastal California
Streams Environmental Management Vol. 35, No. 1, pp. 1-13
8 of 13
File No. 06C-007
3. The City of Carlsbad shall submit reports required under this certification, or other
information required by the Regional Board, to:
Executive Officer
California Regional Water Quality Control Board
San Diego Region
Attn: 401 Certification; File No 06C-007
9174 Sky Park Court, Suite 100
San Diego, California 92123
PUBLIC NOTIFICATION OF PROJECT APPLICATION:
On February 9, 2006, receipt of the project application was posted on the SDRWQCB web site to
serve as appropriate notification to the public.
REGIONAL WATER QUALITY CONTROL BOARD CONTACT PERSON:
Christopher Means
California Regional Water Quality Control Board, San Diego Region
9174 Sky Park Court, Suite 100
San Diego, CA 92123
(858) 637-5581
cmeans@waterboards.ca.gov
9 of 13
File No. 06C-007
WATER QUALITY CERTIFICATION:
I hereby certify that the proposed discharge from the Agua Hedionda Channel Dredging Project
(File No. 06C-007) will comply with the applicable provisions of sections 301 ("Effluent
Limitations"), 302 ("Water Quality Related Effluent Limitations"), 303 ("Water Quality
Standards and Implementation Plans"), 306 ("National Standards of Performance"), and 307
("Toxic and Pretreatment Effluent Standards") of the Clean Water Act. This discharge is also
regulated under California Regional Water Quality Control Board, San Diego Region, Waiver of
Waste Discharge Requirements (Waiver Policy) No. 17. Please note that this waiver is
conditional and, should new information come to our attention that indicates a water quality
problem, the SDRWQCB may issue waste discharge requirements at that time.
Except insofar as may be modified by any preceding conditions, all certification actions are
contingent on (a) the discharge being limited and all proposed mitigation being completed in
strict compliance with the applicants' project description and/or on the attached Project
Information Sheet, and (b) on compliance with all applicable requirements of the Regional Water
Quality Control Board's Water Quality Control Plan (Basin Plan).
RobertusDate
Eecutive Officer
Regional Water Quality Control Board
Attachments: 1. Project Information
2. Distribution List
3. Location Map
4. Rancho Carlsbad Flood Control Project diagram
10 of 13
Attachment 1 FileNo.06C-007
Applicant:
ATTACHMENT 1
PROJECT INFORMATION
Mr. Glen Pruim, Public Works Director
City Of Carlsbad
1635 Faraday Avenue
Carlsbad, CA 92008
N/A
Agua Hedionda Channel Dredging Project
The proposed dredging project would occur Along 3000 feet of Agua
' Hedionda Creek (see attachment 3)
, Creek dredging for flood control purposes
/The dredge work will include the removal of 30,000 to 40,000 cubic yards
of accumulated sediment in Agua Hedionda Creek and Calavera Creek,
located within and adjacent to the Rancho Carlsbad Mobile Home park.
Material will be removed by backhoe or excavator, and no grading of
access roads will be necessary.
Federal Agency/Permit: Army Corps of Engineers Emergency Individual Permit
Applicant
Representatives:
Project Name:
Project Location:
Type of Project:
Project Description:
Other Required Regulatory
Approvals:
California Environmental
Quality Act (CEQA)
Compliance:
Receiving Waters:
Impacted Waters of the
United States:
Dredge Volume:
Related Projects
Implemented/to be
Implemented by the
Applicant(s):
California Department of Fish & Game Streambed Alteration Agreement
California Coastal Commission Jurisdictional Determination
On February 6,2006 the City of Carlsbad approved a Notice of Exemption
from CEQA for an emergency project
Agua Hedionda Creek & Calavera Creek
The project will result in permanent impacts to 0.8 acres of wetlands in
Agua Hedionda Creek, and temporary impacts to 4.2 acres of
Jurisdictional streambed.
30,000 - 40,000 cubic yards of sediment
See attachment 4 (Rancho Carlsbad Flood Control Program of Projects)
Compensatory Mitigation: Mitigation for permanent impacts to 0.8 acres of vegetated waters of the
11 of 13
Attachment 1 File No.06C-007
Best Management
Practices:
Public Notice:
Fees:
U.S. will be achieved at a 3:1 ratio, consisting of the creation of 1.6 acres
of wetlands within the Carlsbad Hydrologic Unit, and the enhancement or
restoration of 0.8 acres of wetlands within the Carlsbad Hydrologic Unit.
Mitigation for temporary impacts to 4.2 acres will be achieved at a 1:1
ratio, by the enhancement of 4.2 acres of waters of the U.S./State within
the Carlsbad Hydrologic Unit.
Within 120 days of the issuance of this certification, the City of Carlsbad
shall develop and submit a Final Wetlands Mitigation and Monitoring
Plan for SDRWQCB approval, which shall be consistent with certification
conditions.
The City of Carlsbad shall dispose of the dredge material at a contained
upland location, or prior to initiation of dredging activities, provide a plan,
including text description and figures, indicating how containment of
dredge materials will occur at all sites where dredge material may be
stockpiled.
The City will monitor hourly for turbidity during dredging activities, and
if turbidity limits are exceeded will re-evaluate the effectiveness of BMPs
in place.
On February 9, 2006, receipt of the project application was posted on the
SDRWQCB web site to serve as appropriate notification to the public.
Total Due: $11,250.00
Total Paid (check No. 141046, 2178): $11,250.00
12 of 13
Attachment 2 Fi|e No Q6C-007
ATTACHMENT!
DISTRIBUTION LIST
Ms. Kari Coler
U.S. Army Corps of Engineers
Regulatory Branch
16885 W. Bernardo Dr., Suite 300 A
San Diego, CA 92127
Mr. Mark Durham
U.S. Army Corps of Engineers
Regulatory Branch
P.O. Box 532711
Los Angeles, CA 90053-2325
State Water Resources Control Board
Division of Water Quality
13 of 13
«*•-*«»
Agua Hedionda and Calavera Creek
Dredging and Improvement Project
Dredging Limits
com
Q
Z
CMavera Outlet Repair
BnsmBJB
Basin B J
84 hirh Storm Drain
Rnnrlio Cnrlsbnd
ConunuiiitY
Legend
Pnojec t Conuuete
hi Plnmiiiig Design Rancho Carlsbad Hood Control Prog'ani of Projects
APPENDIX B
FIGURES
Temporary Upland
Dewatering Site
Future Developmen
Robertson Ranch Master
Rancho Carlsbad
Project Boundary*
Proposed Staging Areas
1 \ "1 Environmentally Sensitive Areas (No Construction/Dredge Work Allowed)
Monitoring
x Preconstruction and Postconstruction Monitoring Locations
• Upstream Monitoring Location
t- Downstream Monitoring Location
* Project Boundary does not reflect actual creek bank limits of emergency dredge work.
All emergency dredge work is permitted to occur only within Agua Hedionda Creek Channel
Source: Eagle Aerial 2004; SanGIS.
600 300 0
^^g^^r
600 Feet
Scale: 1 : 7,200: 1 inch = 7,200 feet
Figure 1
Turbidity Monitoring Plan, Agua Hedionda Creek Channel Emergency Dredging
Agua Hedionda Channel Emergency Dredge Work
2005/OSOaol01/5CK/Mxd/EMERGENCtDREDGE/March 2006 Base Map.mxd SPSlf F6 IB.Marraccini) 3/6/2006
Figure 2. Plan View of Sediment/Turbidigy Protection System, Agua Hedionda Creek Channel
Emergency Dredging Project.
Figure 3. Profile View of Sediment/Turbidity Protection System, Agua Hedionda Creek Channel Emergency Dredging Project.
APPENDIX C
HORIBAU-10
WATER QUALITY MULTIMETER SPECIFICATIONS
Explore the future
WATER QUALITY CHECKER
U-10
\^r~
Simple, Handy Instrument Contains Powerful Sensor for S
The Horiba U-10 water quality checker brings laboratory accuracy and the ease
of push-button operation to water quality measurement in the field. Six parame-
ters can be measured : pH, temperature, dissolved oxygen, electrolytic conduc-
tivity, turbidity, and, salinity. Featuring a powerful sensor and state-of-the-art-
functions, the U-10 makes it easy to get highly reliable water quality data simply
and quickly just by submersing the sensor in the water. The U-10 is flexible
enough to use for cheeking the quality of a broad range of water samples, from
factory effluent to urban drainage, river water, lake and marsh water, aquatic
culture tanks, agricultral water supplies, and sea water. The main unit is water-
resistant, so it can be used safely even in the rain.
Automatic calibration function
calibrates the instrument simply at
the touch of a button for more high-
ly reliable data
what used to be a complicated calibra-
tion process is now easy. Just fill the
supplied beaker with the standard solu-
tion, immerse the sensor and press a
button once for one-point calibration for
each of the four parameterijili^i(Si»B«
ductivity, turbidity and DO. 'tp^Mttlt
calibration is also possible should more
precise data be required.
Automatic salinity correction
functio makes it possible to
measure DO in both fresh water and
salt water
It is now possible to measure DO in
either fresh or salf water with the same
instrument. When meauring DO in salt
water, it will automaticaly measure the
salt concentration and make the salinity
correction. It is also possible to set.fi
freely selectable salinity correction fac-
tor of between 0 and 4
20 samples of data on 6 parameters
can be stored in memory to be
recalled later for display and print out
Store the results of measurement of all
six parameters for up to 20 samples.
There is no need to record measured
values on site. Data stored in memory
can be recalled and displayed at any
time, and can even be simultaneously
printed out on any standed prir»6W by-
connecting it to the Centronicsr-spsip-
cation printer output terminals.
Simultaneous Measurement of Six Parameters
Expanded display function handles
any need for more precise data
If more precise data is needed, select the
expanded display mode to display data on
any para-
meter to
we
Temp, sensor
pH sensor
(reference electrode)
Direct-submersion sensor, no need
samples
: 11-10 sensor measures by being
submersed in the river, sea or
water. Forget troublesome sam-
pling. The standard cable length is two
meters, but the sensor is constructed to
be able to withstand water pressure at
depths of up to 10 meters and is thus
suitable for an even wider range of appli-
cations if used with the optional 10-meter
cable.
Data back-up function keeps data
safe even if batteries run down
The U-10 features a data back-up func-
tion to ensure that precious data is never
lost by accident. Sensor calibration values
and stored data remain safely in the
memory even if the batteries run down.
No need to worry even if you forget
to switch off the power
Attention to the smallest detail has result-
ed in an automatic energy-saving function
that switches the instrument off automati-
cally any time 30 minutes pass without
any key being pressed.
Carrying case,
(included)
Powerful sensor gives precise data
pH
Glass electrode. The glass electrode and
reference electrode are of the cartridge
type so they are simple to replace and
require no maintenance.
Conductivity
Alternating four-electrode cell resistant to
the effect of polarization. Gives reliable,
stable data even at high, concentrations.
Range switches automatically to the most
appropriate of three — 0-1 mS/cm, 1-10
mS/cm, or 10-100 mS/cm — depending
upon the sample.
Turbidity
Ratio of transmitted to scattered light. The
light source is an LED. This method gives
a broader meaurement range than optical
systems based purely on transmitted light
or scattered light and is little affected by
particle coloration, thus giving highly
dependable data.
DO
Membrane/galvanic cell. Capable of sta-
ble data display, unaffected by coexisting
gases other than oxygen. The electrode
is of the cartridge type.
Temperature
Thermistor. Can measure from 0 to 50°C.
Also used for automatic temperature
compensation when measuring pH, DO
and conductivity.
Salinity
Computed from conductivity data. Mea-
surement range is 0 to 4 percent.
SPECIFICATIONS
Parameters
Principle
Range
Resolution
Standard
Expanded
Repeatability
Temp, compensation
Calibration
Display
Printer output
Power
Sensor assembly
Weight
pH
Glass electrode
0-14 pH
0.1 pH
O.OIpH
±0.05pH
0-50 'C
Auto one-point
calibration, manual
two-point calibration
Conductivity
Alternating
four-electrode
0— 100mS/cm
(mS/cm) (mS/cm)
0-1 0.01
1-10 0.1
10-100 1
(mS/cm) (mS/cm)
0-1 0.001
1-10 0.01
10-100 0.1
±1%of
full scale
0-50'C
Auto one-point
calibration, manual
two-point calibration
Turbidity
Scattering/
transmitting light
0-800 NTU
10NTU
1 NTU
±3%of
full scale
-
Auto one-point
calibration, manual
two-point calibration
Dissolved oxygen
Membrane/
galvanic cell
0-19.9 mg/«
0.1 mgl i
0.01 mg/l
±0.1 mg/l
o-4or
Auto one-point cali-
bration(air), manual
two-point calibration
Temperature
Thermistor
o-sor
1 'C
0.1 'C
±0.3'C
-
-
Salinity
I' Alternating "I*
I four-electrode J
0-4 %
0.1 %
0.01 %
±0.1 %
-
-
LCD
Centronics
Battery 6F22(S-006P)X1pc.
Standard : sensor with 2 m cable, Optional : sensor with 10 m cable
Main unit : approx. 400g (0.9 Ib), Sensor assembly (2 m cable) : approx. 800 g (1 .8 Ib)
* Salinity is calculataed from the conductivity data.
Dimensional Outlines unit
11',
NO. 3 BftTE / /
Ptf,.
:<G»
-•3.92*4. Si
25.5fl»22
Data stored in memory can be printed out on any
printer with Centronics interface.
•7
• 8
*ta
8
a
*
h
«,sr
9
s
P.6}
oo o n1
U J
-41 .
Please read the operation manual before using this product to assure safe and proper handling of the product.
•The contents of this catalog are subject to change without prior notice, and without any subsequent liability to this company.
•The color of the actual products may differ from the color pictured in this catalog due to printing limitations.
• It is strictly forbidden to copy the content of this catalog in part or in full. /HUKII
Head Office
Miyanohigashi, Kisshoin
Minami-ku, Kyoto, Japan
Phone: 81 (75)313-8123
Fax: 81 (75) 321-5725
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Pte. LTD.10Ubi Crescent
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LIMITED
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CpjWl, http://www.horiba.com e-mail: info@horiba.co.jp
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Phone: 81 (3)3861-8231
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Phone: 1 (949) 250-481 1
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Head OfficeHans-Mess- Sir. 6
D-61440Oberursel/Ts.Germany
Phone: 49 (6172) 1396-0Fax: 49 (6172) 137385
Beijing Representative Office
Suite 1409, Tower B,
COFCO Plaza, No. 8,
Jianguomennei Avenue,
Beijing, China, 100005
Phone:8610-6522-7573
Fax: 86 10-6522-7582
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Phone: 1 (734)213-6555
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Phone: 49 (2175) 8978-0Fax: 49 (21 75) 8978-50
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UnitFI 16F
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Fax: 1 (408) 730-8975
HORIBA FRANCE
Rue L et A. Lumiere
Technoparc
F-oi630St-Genis-Pouilly
FrancePhone: 33 (4) 50-42-27-63
Fax: 33 (4) 50-42-07-74
:e Taiwan Representative Office
No.15Alley6, Lane 485,
Sec. 1, Kuang Fu Rd.,i, Hsin-Chu, Taiwan, R.O.C.
Phone: 886 (3) 5799143Fax: 886 (3) 5799164
Kaplanstrasse 5
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Phone: 43 (2272) 65225
Fax: 43 (2272) 65230
HORIBA SWEDEN
Hertig Carlsvag 55-57
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Phone: 46 (8) 550-80701
Fax: 46 (8) 550-80567
Explore the future - 2003
112-6Sogong-DongChoong-ku, Seoul, Korea
Phone: 82 (2) 753-7911Fax: 82 (2) 756-4972
HORIBA CZECHIA
Organizachi slozka PrahaPetrohradska 13
CZ-101 00 Praha 10, Czech Republic
Phone: 420 (2) 717-464-80
Fax: 420 (2) 71 7-470-64
HORIBA ITALY
EuropalaceCorso Torino 43/45
10043 Orbassano,Torino,ltaly
Phone: 39 (01 1)9040601
Fax: 39 (01 1)9000448
|iuTletin:HFIE-1876Dl Printed in Japan ZH-R(SK)33
APPENDIX D
FIELD DATA COLLECTION LOG
Turbidity Monitoring for Agua Hedionda Creek Emergency Project
Weather Conditions:
Time Turbidity Flow
(military) (NTU) (ft/sec)Comments
Date:
Monitor:
DN-
UP-
Time Turbidity Flow
(military) (NTU) (ft/sec) Comments
DN-
UP-
Time Turbidity Flow
(military) (NTU) (ft/sec) Comments
DN-
UP-
Time Turbidity Flow
(military) (NTU) (ft/sec) Comments
DN-
UP-
Time Turbidity Flow
(military) (NTU) (ft/sec) Comments
DN-
UP-
Time Turbidity Flow
(military) (NTU) (ft/sec) Comments
DN-
UP-
Time Turbidity Flow
(military) (NTU) (ft/sec) Comments
IDN-
UP-
Time Turbidity Flow
(military) (NTU) (ft/sec) Comments
DN-
UP-
Time Turbidity Flow
(military) (NTU) (ft/sec) Comments
DN-
UP-
Time Turbidity Flow
(military) (NTU) (ft/sec)
DN-
UP-
Comments
General Comments: