HomeMy WebLinkAboutCT 14-03; BEACHWALK AT MADISON; NOISE STUDY FOR THE PROPOSED BEACHWALK AT MADISON RESIDENTIAL DEVELOPMENT IN THE CITY OF CARLSBAD; 2014-10-24•
WIELAND
ACOUSTICS
noise & vibration consultants
WIELAND ACOUSTICS, INC.
3100 Airway Avenue, Suite 102
Costa Mesa, CA 92626
Tel: 949.474.1222
www.wielandacoustics.com
Noise Study for the Proposed
Beachwalk at Madison Residential Development
in the City of Carlsbad
Project File 14.039.00
October 24, 2014
Prepared for:
Vesta Pacific Development
1818 First Avenue, Suite 100
San Diego, CA 92101
Prepared by:
David Wieland, Principal Consultant
WIELAND
ACOUSTICS
noise&: v1brat100 const1ltarits
Table of Contents
VESTA PACIFIC DEVELOPMENT
Beachwalk at Madison
Project File 14.039.00 -FINAL
1 INTRODUCTION/PROJECT DESCRIPTION ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1
2 NOISE STANDARDS •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 3
2.1 CITY OF CARLSBAD ..................................................................................................................... 3
2.2 STATE OF CALIFORNIA NOISE INSULATION STANDARDS .................................................................... 3
3 EXTERIOR NOISE LEVELS ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 3
3.1 TRAFFIC NOISE .......................................................................................................................... 4
3.2 RAILROAD NOISE ....................................................................................................................... 4
3.3 OVERALL NOISE ENVIRONMENT ................................................................................................... 6
4 ASSESSMENT OF IMPACT ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 6
5 NOISE CONTROL REQUIREMENTS ......................................................................................... 6
6 PARTY WALL AND FLOOR/CEILING SEPARATION ASSEMBLIES ............................................... 7
7 CONCLUSION ....................................................................................................................... 7
8 IMPLEMENTATION DISCLAIMER ........................................................................................... 7
9 REFERENCES ........................................................................................................................ 7
List of Tables
Table 3-1. Data Used in Traffic Noise Analysis ...................................................................................... 4
Table 3-2. Existing and Future Train Volumes on the BNSF Railroad .................................................... 6
Table 3-3. Estimated Overall Future Noise Levels at the Project Site ................................................... 6
List of Figures
Figure 1-1. Location of Project Site ....................................................................................................... 1
Figure 1-2. Proposed Site Plan ............................................................................................................... 2
Figure 3-1. Location of Train Noise Measurement Relative to the Project Site .................................... 5
List of Appendices
Appendix I.
Appendix II.
Noise Measurements
Exterior Traffic Noise Analysis
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October 24, 2014
WIELAND
ACOUSTICS
noise & vibration consultants
1 Introduction/Project Description
VESTA PACIFIC DEVELOPMENT
Beachwalk at Madison
Project File 14.039.00 -FINAL
The purpose of this study is to provide a noise analysis for the proposed 6-unit condominium
development to be located on Madison Street in the City of Carlsbad, California. Refer to Figure 1-1
for the location of the project site and Figure 1-2 for the proposed site plan.
The project site is bounded on the northwest by a professional offices building, on the northeast by
apartments, on the southeast by a single family residence, and on the southwest by Madison Street.
Further to the southwest across Madison Street are several additional apartment buildings. To the
north and east of the project site are additional professional office properties.
Figure 1-1. Location of Project Site
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October 24, 2014
"' WIELAND
ACOUSTICS
VESTA PACIFIC DEVELOPMENT
Beachwalk at Madison
Project File 14.039.00 -FINAL
z
0
VJ
' : ! : ~~ l
'.~ I
I I ~.:~J-·-
1 : I i : : I I : :
: ,· --,_
I
SITE PLAN ---~ ~ =,-;'7~--------------------------·~-·; -7Rl-.H,Rl•\.(!. '<
Figure 1-2. Proposed Site Plan
The following report provides a description of the noise standards that apply to the project, an
analysis of the future noise environment at the site, an assessment of impact relative to the noise
standards, and noise mitigation recommendations.
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October 24, 2014
WIELAND
ACOUSTICS
noise &: vibration consultants
VESTA PACIFIC DEVELOPMENT
Beachwalk at Madison
Project File 14.039.00 -FINAL
2 Noise Standards
2.1 City of Carlsbad
The City of Carlsbad's Noise Guidelines Manual [1] identifies the maximum permissible exterior and
interior noise levels for residential uses. Exterior noise levels must be mitigated to a community
noise equivalent level (CNEL) of 60 dB or less, except for areas impacted by McClellan Palomar
Airport, which must be mitigated to 65 dB CNEL or less. However, it is our understanding that the
City has waived the exterior noise standard for this project.
Interior noise levels must be mitigated to 45 dB CNEL or less when openings to the exterior of the
residence are closed.
2. 2 State of California Noise Insulation Standards
All multifamily projects must comply with the State of California's noise insulation standards (CAC
Title 24). The State's Title 24 standards specify that the intrusion of noise from exterior sources
(such as trains) shall not exceed a CNEL of 45 dB within the interior of any habitable space. In
addition, the State standards set minimum ratings for the sound and impact transmission of party
wall and floor/ceiling separation assemblies. This report only provides an evaluation ot and
recommendations for, the exterior-to-interior requirements of the State standards. It is the project
developer and/or architect's responsibility to ensure compliance with the separation assembly
requirements of the State standards.
3 Exterior Noise Levels
In order to document the existing noise environment at the project site, a measurement was
obtained on the adjacent property to the northwest at the setback (about 40 feet) of the proposed
buildings from the centerline of Madison Street. To obtain the measurement, the microphone was
positioned at a height of 5' above the ground, and extraneous noise sources (such as sirens) were
excluded from the measurement by placing the sound level meter on "standby" until the noise
event concluded. The results of the noise measurements, provided in Appendix I, indicate an
average noise level of 53.4 dBA during the early afternoon.
The instrumentation used to obtain the noise measurement consisted of an integrating sound level
meter (Model 820) and an acoustical calibrator (Model CAL200) manufactured by Larson Davis
Laboratories. The accuracy of the calibrator is maintained through a program established by the
manufacturer, and is traceable to the National Bureau of Standards. All instrumentation meets the
requirements of the American National Standards Institute (ANSI) Sl.4.
The two noise sources that potentially impact the project site are traffic on the local streets and the
1-5 freeway, and train movements on the Burlington Northern Santa Fe (BNSF) railroad. Each will be
discussed separately in the following sections.
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WIElAND
3. 1 Traffic Noise
VESTA PACIFIC DEVELOPMENT
Beachwatk at Madison
Project File 14.039.00 -FINAL
The following data were used in the analysis of future noise exposures at the project site due to
traffic on the local streets and freeway:
Table 3-1. Data Used in Traffic Noise Analysis
Traffic: Parameter I Laguna Drive I Jefferson Street I 1-5 Fwy.
Year 2035 Average Daily Traffic Volume (ADT)1 6,700 8,600 242,400
Traffic Speed 30mph 30mph 65 mph
% Automobiles Daily2 97.42% 97.42% 95.19%
% Medium Trucks Daily2 1.84% 1.84% 1.89%
0.74% 0.74% 2.92%
No traffic data is available from the SAN DAG database for Madison Street; therefore, it has been
excluded from the analysis.
Using the above traffic data and the FHWA RD 77-108 Highway Traffic Noise Prediction Model [2],
an analysis was conducted to estimate the traffic noise exposures at the project site due to these
arterials. The results of our analysis, provided in Appendix II, indicate an estimated CNEL of 55 dB at
the nearest property line due to traffic on Laguna Drive, 56 dB at the nearest property line due to
traffic on Jefferson Street, and 63 dB at the nearest property line due to traffic on the 1-5 freeway.
3.2 Railroad Noise
Located to the southwest, at a distance of about 1,170 feet, is the Burlington Northern Santa Fe
(BNSF) railroad. This railroad is used by both passenger trains (Amtrak and COASTER) and freight
trains (BNSF). The overall noise levels generated by the railroad are determined by a combination of
variables including the type and number of trains, the length and speed of trains, the time of day at
which trains pass by, the use of train horns associated with at-grade crossings, the distance from the
railroad to the project site, and the presence of intervening walls or structures.
Over a 24-hour period between June 3 and June 4, 2014, a noise measurement was obtained on
Roosevelt Street as part of a previous study [3] in order to document the existing noise environment
generated by trains and traffic in the study area. (Refer to Figure 3-1 for the location of the
measurement relative to the project site on Madison Street.) The measurement microphone was
positioned at a height of about 20' above the ground in order to be more representative of the
upper floors of the proposed buildings. The results of the noise measurements indicated an existing
CNEL of 61.0 dB at this location. To provide a conservative study, the results of the noise
measurement were attributed in the previous study entirely to train noise, rather than to a
combination of train and traffic noise. The same assumption will be used in the current study for the
Beachwalk at Madison project.
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WIELAND
ACOUSTICS
noise a 111brat1on consultants
VESTA PACIFIC DEVELOPMENT
Beachwalk at Madison
Project File 14.039.00 -FINAL
Figure 3-1. Location of Train Noise Measurement Relative to the Project Site
In the future the railroad corridor will include a second line (double tracking), and the number of
trains using the corridor will increase. The inclusion of future double-tracking was based on publicly
available environmental/planning documents [4] for proposed improvements to the Los Angeles-
San Diego-San Luis Obispo (LOSSAN) Rail Corridor, which includes the BNSF railroad adjacent to the
project site. The estimated increase in rail traffic was determined from existing train timetables and
from data provided in the LOSSAN Corridorwide Strategic Implementation Plan [4). Table 3-2
summarizes the existing and future train data. Based on the indicated increase of 96% in train
volumes, it was estimated that the overall noise level of the railroad would increase by 2.9 dBA.
Thus, at the measurement position on Roosevelt Street, the estimated future CNEL due to railroad
operations is 63.9 dB.
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WIELAND
ACOUSTICS
VESTA PACIFIC DEVELOPMENT
Beachwalk at Madison
Project File 14.039.00 -FINAL
Table 3-2. Existing and Future Train Volumes on the BNSF Railroad
I Existing Daily Train I Future (2030) Daily I % Increase in Train
Rail Operator/Line Volume Train Volume Volume
Amtrak Pacific Surfliner 22 36 64%
Metrolink Commuter Service 0 14 -
COASTER 22 40 82 %
BNSF Frel;ht 6 8 33%
Total Trains 50 98 96 %
Using procedures developed by the Federal Transit Administration [5], the noise level at the
Madison Street project can be estimated by calculating the additional attenuation that will occur as
a result of the increase distance from the railroad tracks relative to the Roosevelt site. The Roosevelt
measurement was obtained at a distance of approximately 550 feet from the tracks, and the
Madison Street project is located approximately 1,170 feet from the tracks. This increased distance
will provide about 4.9 dB of additional attenuation. Applying this to the estimated future CNEL of
63.9 dB at the Roosevelt site yields an estimated future CNEL of 59 dB at the Madison site.
3. 3 Overall Noise Environment
The overall noise environment at the project site is obtained by adding together, on a logarithmic
basis, the individual contributions of the various traffic and railroad noise sources that impact the
site, taking into account the barrier effects that will be provided by the project buildings. This is
illustrated in Table 3-3.
Table 3-3. Estimated Overall Future Noise Levels at the Project Site
\ ... -_lrldt,'!c!u~fl!l"!l:>ut'ic>rl_ te>_Q.,er~ CN~ _ ] overall
Location ~ CNEL
Northwest 56 dB 63 dB
Northeast N li ible 64 dB
Southeast 56 dB 62 dB
Southwest 59 dB 60 dB
4 Assessment of Impact
As indicated in Table 3-3, the estimated future CNEL at the exterior facades of the project buildings
is expected to be 64 dB or less. Since standard building construction provides a noise reduction of 20
dB or more with windows and doors closed, the estimated future interior CNEL within the project
buildings is 44 dB or less. This complies with the City and State interior standard of 45 dB CNEL.
5 Noise Control Requirements
The City and State interior noise standard of 45 dB will be achieved with standard residential
construction. Therefore, additional noise control measures are not required. However, the interior
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WIELAND
ACOUSTICS
noise & 111brat1on con!:.ultarits
VESTA PACIFIC DEVELOPMENT
Beachwalk at Madison
Project File 14.039.00 -FINAL
noise standard is to be met in all units with windows and doors closed. Therefore, ventilation is
required in all homes per the Uniform Building Code and Uniform Mechanical Code standards in
order to provide a habitable environment. Wall-mounted air conditioners shall not be used.
6 Party Wall and Floor/Ceiling Separation Assemblies
The State's noise insulation standards (Title 24) specify minimum sound ratings for party wall and
floor/ceiling separation assemblies between residential units within a multifamily building. The
design of these assemblies is beyond the scope of this report. It is the project developer and/or
architect's responsibility to ensure compliance with the separation assembly requirements of the
State standards.
7 Conclusion
Analysis indicates that the project site is not exposed to significant levels of noise as a result of
traffic on the local roadways and freeway, or by trains on the nearby BNSF railroad. It is concluded,
therefore, that the project will comply with the City and State interior noise standards using
standard residential building construction with mechanical ventilation.
The findings and recommendations provided in this report are based on the referenced plans. If
these plans change in the future then it is further recommended that a qualified acoustical
consultant review the final design to verify compliance with the City and State's noise standards.
It is noted that, even after the implementation of the recommendations, passing trains will still be
audible within the homes, particularly when they sound their horns.
8 Implementation Disclaimer
Wieland Acoustics assumes no responsibility whatsoever for the implementation of the
recommendations provided in this report, or for the details of construction or the final noise levels
following completion of the project. We are responsible only for the accuracy of our calculations,
which are based on the construction elements detailed in this report. No guarantees or assurances
are given or implied.
9 References
1. City of Carlsbad, Noise Guidelines Manual. City of Carlsbad/Nolte and Associates, Inc. September
1995.
2. FHWA Highway Traffic Noise Prediction Model. Federal Highway Administration Report No.
FHWA-RD-77-108. December 1978.
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,,·
WIELAND
ACOUSTICS
t1111se tl v1brat•on cons,Jltant>
;<•-,""'
VESTA PACIFIC DEVELOPMENT
Beachwalk at Madison
Project File 14.039.00 -FINAL
3. Noise Study far the Proposed Carlsbad Village Residential Development at 2683 Roosevelt Street
in the City of Carlsbad. Wieland Acoustics, Inc. July 2, 2014.
4. LOSSAN Carridarwide Strategic Implementation Plan, Final Report. HNTB. April 2012.
5. Transit Noise and Vibration Impact Assessment. U.S. Department of Transportation/Federal
Transit Administration (FTA-VA-90-1003-06). May 2006.
6. Beachwalk @ Madison Design Package. The McKinley Associates, Inc. September 10, 2014.
7. Tentative Map for Beachwalk at Madison. Pasco Laret Sutter & Associates. September 17, 2014.
www.wfelandacoustics.com 8
October 24, 2014
APPENDIX I
Noise Measurements
Table 1-1. Noise Survey
Project:
Position:
Date:
Time:
Noise Source:
Distance:
SLM Height:
LD 820 SIN:
LD CAL200
Calibrator S/N:
Operator:
70
65
g 60 Ill "O
"ii t 55
..J
GI "' ·o 50 z
45
40
0
Beachwalk at Madison
On adjacent property to the northwest,
at the offset of the proposed residences
October 23, 2014
Noted
Ambient traffic
40' from centerline of Madison St.
5'
0996
2916
Cynthia Bordash
20 40 60 80
Percent of Time Noise Level is Exceeded
* Leq is the average sound level during the measurement period.
n*
2
8
25
50
90
99
Leq
Lmax
Lmin
100
Ln is the sound level exceeded n% of the time during the measurement period.
Measurement Period
1:uis PM
to to
1:44 PM
Ln Ln
62.8
58.7
51.3
46.6
43.7
42.8
53.4
69.2
42.5
Lmax and Lmin are the maximum and minimum sound levels during the measurement period.
WIELAND ACOUSTICS, INC.
to
Ln
APPENDIX II
Exterior Traffic Noise Analysis
Table 11-1. Analysis of Unmitigated Traffic Noise Levels at N. Property Line, from Laguna Drive
ADT: 6,700 No. of Lanes: 2
Site Conditions: Hard
Noise Emission Curves: Calveno
Autos: Total%: 97.42% Daytime%:
Medium Trucks: Total%: 1.84% Daytime%:
Heavy Trucks: Total%: 0.74% Daytime%:
Elevations: Source: 0.0 ft. Barrier:
Heights: Source: varies Barrier:
Gradient of Near Lane: 0.00%
Speed Limit: 30 mph
Date: Oct. 23, 2014
75.51% Evening%: 12.57%
1.56%
0.64%
Evening%:
Evening%:
0.0 ft. Receiver:
0.0 ft. Receiver:
0.09%
0.02%
0.0 ft.
5.0 ft.
Angle of View, Left:
Angle of View, Right:
Nighttime %: 9.34%
Nighttime %: 0.19%
Nighttime %: 0.08%
-90.0 deg.
90.0 deg.
Distance from Receiver to Lanes, #1: 219.0 ft. Calibration Factor for Each Lane, #1:
Average Daytime Leq:
CNEL:
Ldn:
#2: ft.
#3: ft.
#4: 231.0 ft.
#5: ft.
#6: ft.
54.1 dB(A)
55.3 dB
54.8 dB
#2:
#3:
#4:
#5:
#6:
Average Evening Leq: 50.9 dB(A) Average Nighttime Leq:
0.0 dB
dB
dB
0.0 dB
dB
dB
46.3 dB(A)
Table 11-2. Analysis of Unmitigated Traffic Noise Levels at E. Property Line, from Jefferson Street
ADT: 8,600 No. of Lanes: 2
Site Conditions: Hard
Noise Emission Curves: Calveno
Autos: Total%: 97.42% Daytime%:
Medium Trucks: Total%: 1.84% Daytime%:
Heavy Trucks: Total%: 0.74% Daytime%:
Elevations: Source: 0.0 ft. Barrier:
Heights: Source: varies Barrier:
Gradient of Near Lane: 0.00 %
Speed Limit: 30 mph
Date: Oct. 23, 2014
75.51% Evening%: 12.57%
1.56%
0.64%
Evening%:
Evening%:
0.0 ft. Receiver:
0.0 ft. Receiver:
0.09%
0.02%
0.0 ft.
5.0 ft.
Angle of View, Left:
Angle of View, Right:
Nighttime %: 9.34%
Nighttime %: 0.19%
Nighttime %: 0.08%
-90.0 deg.
90.0 deg.
Distance from Receiver to Lanes, #1: 217.0 ft. Calibration Factor for Each Lane, #1:
Average Daytime Leq:
CNEL:
Ldn:
#2: ft.
#3: ft.
#4: 229.0 ft.
#5: ft.
#6: ft.
55.2 dB(A)
56.4 dB
56.0 dB
#2:
#3:
#4:
#5:
#6:
Average Evening Leq: 52.1 dB(A) Average Nighttime Leq:
0.0 dB
dB
dB
0.0 dB
dB
dB
47.4 dB(A)
)
Table 1/-3. Analysis of Unmitigated Traffic Noise Levels at E. Property Line, from /-5 Freeway
ADT: 242,400 No. of Lanes: 6
Site Conditions: Soft
Noise Emission Curves: Calveno
Autos: Total%: 95.19% Daytime%:
Medium Trucks: Total%: 1.89% Daytime%:
Heavy Trucks: Total%: 2.92% Daytime%:
Elevations: Source: 0.0 ft. Barrier:
Heights: Source: varies Barrier:
Gradient of Near Lane: 0.00 %
Speed Limit: 65 mph
Date: Oct. 23, 2014
67.16% Evening%: 18.34%
1.52%
1.99%
Evening%:
Evening%:
0.0 ft. Receiver:
0.0 ft. Receiver:
0.10%
0.22%
0.0 ft.
5.0 ft.
Angle of View, Left:
Angle of View, Right:
Nighttime %: 9.68%
Nighttime %: 0.26%
Nighttime %: 0.71%
-90.0 deg.
90.0 deg.
Distance from Receiver to Lanes, #1: 1669.0 ft. Calibration Factor for Each Lane, #1:
Average Daytime Leq:
CNEL:
Ldn:
#2:
#3:
#4:
#5:
#6:
60.4 dB(A)
63.0 dB
62.4 dB
1686.5 ft. #2:
1704.0 ft. #3:
1754.0 ft. #4:
1772.0 ft. #5:
1790.0 ft. #6:
Average Evening Leq: 60.0 dB(A) Average Nighttime Leq:
0.0 dB
0.0 dB
0.0 dB
0.0 dB ' )
0.0 dB
0.0 dB
54.4 dB(A)
GeoTek, Inc.
13&4 Poinsettia Avenue, Suite A Vista. CA 92081-8505
(760) 599-0509 · / . (760) 599-0593 www.geoteku$a.com
Vesta Pacific Development
1818 2"d Street
San Diego, CA 920 i I
Attention: Mr. Geoff McComic
Subject: Comments Regarding Tentative Map
Beachwalk at Madison
Carlsbad, California
September 19, 2014
Project Number 3441-SD
Reference: "Preliminary Geotechnical Evaluation, APN 203-100-0 I, Madison Street Project,
Carlsbad, California" by Geo Tek, Inc:, dated September, 30 2015
Dear Mr. McComic:
Presented herein are comments regarding the "Tentative Map for Beachwalk at Madison"
prepared by Pasco Laret Suitor, dated September 17, 2014. The Tentative Map includes Sheets I
and 2. Sheet 2 is a Preliminary Grading Plan.
We had not been provided with a grading plan in preparing our referenced report. However, the
proposed overall grading is to lower the site from existing grades which was addressed in our
report and recommendations developed accordingly.
We were requested to address three specific items pertinent to the Tentative Map.
a. Determine the minimum and maximum recommended positive grade away from the foundation
for impervious and pervious surfaces:
Comments: The Preliminary Grading Plan indicates that a minimum fall of 2.0% will be
maintained near the foundations. This is consistent with our opinion for both pervious and
impervious surfaces.
b. Provide recommendations for the pervious pavement and bio-retention (vegetated
swale) design:
Comments: Sheet I of the Tentative Map provides typical sections for both the pervious
pavement and bio-retention designs are provided. Those designs are in general keeping with
industry practice and are as such considered acceptable. Paver manufacturers may have slightly
variant preferred section designs and the final design should consider the manufacturers criteria.
GEOTECHNICAL I ENVIRONMENTAL I MATERIALS
------------------------
Comments on Tentative Map
Beachwalk at Madison
Carlsbad, California
September 19, 2014
3441-SD
Page 2
c. Provide analysis of potential soil contamination caused by a history of dumped vehicles and
other equipment on site which has since been removed.
Comments: As part of a Phase I Environmental Site Assessment, Geo T ek reviewed
environmental data base report and other pertinent data for the site and nearby area. The site
was observed in aerial photographs to have vehicles and possibly storage containers on it starting
in late 2006 and continuing through late 2012 or early 2013. While it seems likely that some oil,
or other petroleum products were spilled during that time period, our experience suggest that
lubricants would be the most significant products. These typically leave obvious soil staining. No
significant staining was noted during site observations. No conditions of recognized
environmental concern were noted that were considered to warrant further assessment.
Closure
Our above findings/recommendations were prepared in conformance with generally accepted
professional engineering practices and no further warranty is implied. This report is subject to
review by the controlling authorities for this project. GeoTek accepts neither responsibility nor
liability for work, testing, or recommendations performed or provided by others.
If you should have any questions, or if Geo T ek can be of additional service, please do not
hesitate to contact the undersigned.
GeoTek, Inc.
RCE 35007, Exp. ~ilffl'l-5-
Senior Project En
Copies: (I) Addressee via email
(I) Brian Ardolino via email
GEOTEK