HomeMy WebLinkAboutRF-EME 2018 Compliance Reportr)
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Radio Frequency
(RF-EME)
— Electromagnetic Energy
Compliance Report
Site No. SBLO51
M RLOS038772
SBL051-01 Santa Rosa park
190 Santa Rosa Street
San Luis Obispo, California 93405
San Luis Obispo County
35.290106;-120.663881 NAD83
Light Pole
The proposed AT&T installation will be in compliance with FCC regulations
upon proper installation of recommended signage.
EBI Project No. 6218000226
January 23, 2018
Prepared for:
AT&T Mobility, LLC
c/o MasTec Network Solutions
18 Centerpoint Drive, Suite 110
La Palma, CA 90623
Prepared by:
,MEBI Consulting
environmental I engineering I due diligence
RF-EME Compliance Report
EBI Project No. 6218000226
USID No. 115061 Site No. SBL051
190 Santa Rosa Street, San Luis Obispo, California
TABLE OF CONTENTS
EXECUTIVESUMMARY ...............................
1.0 FEDERAL COMMUNICATIONS COMMISSION (FCC) REQUIREMENTS 2.0 AT&T RF EXPOSURE POLICY REQUIREMENTS ..................................... 3
................................... S
3.0 WORST -CASE PREDICTIVE MODELING................................................................................. S 4.0 RECOMMENDED SIGNAGE/COMPLIANCE PLAN,,,,,,,,,,,,,,
S.O SUMMARY AND CONCLUSIONS.. 7
6.0 LIMITATIONS.........................................................................................................................8
APPENDICES
Appendix A Personnel Certifications
Appendix B AT&T Compliance/Signage Plan
Appendix C ROOFVIEWO EXPORT FILE
EBI Consulting ♦ 21 B Street ♦ Burlington, MA 01$03 ♦ 1.800.786.Z346
f
RF-EME Compliance Report
EBI Project No. 6218000226
EXECUTIVE SUMMARY
Purpose of Report
USID No. 115061 Site No. SBL051
190 Santa Rosa Street, San Luis Obispo, California
EnviroBusiness Inc. (dba EBI Consulting) has been contracted by AT&T Mobility, LLC to conduct radio
frequency electromagnetic (RF-EME) modeling for AT&T Site SBLO51 located at 190 Santa Rosa Street in
San Luis Obispo, California to determine RF-EME exposure levels from proposed AT&T wireless
communications equipment at this site. As described in greater detail in Section 1.0 of this report, the
Federal Communications Commission (FCC) has developed Maximum Permissible Exposure (MPE) Limits
for general public exposures and occupational exposures. This report summarizes the results of RF-EME
modeling in relation to relevant FCC RF-EME compliance standards for limiting human exposure to RF-
EME fields.
This report contains a detailed summary of the RF EME analysis for the site, including the following:
■ Site Plan with antenna locations
■ Graphical representation of theoretical MPE fields based on modeling
■ Graphical representation of recommended signage and/or barriers
This document addresses the compliance of AT&T's transmitting facilities independently and in relation
to all collocated facilities at the site.
Statement of Compliance
A site is considered out of compliance with FCC regulations if there are areas that exceed the FCC
exposure limits and there are no RF hazard mitigation measures in place. Any carrier which has an
installation that contributes more than 5% of the applicable MPE must participate in mitigating these RF
hazards.
As presented in the sections below, based on worst -case predictive modeling, the worst -case emitted
power density may exceed the FCC's general public limit within approximately 2 feet of ATT's proposed
antennas at the utility line level. Modeling also indicates that the worst -case emitted power density will
not exceed the FCC's occupational limit at the utility line level. Additionally, there are areas where
elevated workers may be exposed to power densities greater than the occupational limits. The worst -
case emitted power density may exceed the FCC's occupational limit within approximately 12 feet of
AT&T's proposed antennas at the antenna face level. Workers and the general public should be informed
about the presence and locations of antennas and their associated fields.
As such, the proposed AT&T installation is in compliance with FCC regulations upon proper installation
of recommended signage and/or barriers.
AT&T Recommended Signage/Compliance Plan
AT&T's RF Exposure: Responsibilities, Procedures & Guidelines document, dated October 28, 2014,
requires that:
I. All sites must be analyzed for RF exposure compliance;
2. All sites must have that analysis documented; and
3. All sites must have any necessary signage and barriers installed.
Site compliance recommendations have been developed based upon protocols presented in AT&T's RF
Exposure: Responsibilities, Procedures & Guidelines document, dated October 28, 2014, additional
EBI Consulting ♦ 21 B Street ♦ Burlington, MA 01803 ♦ 1.800.786.2346
ok1
RF-EME Compliance Report
EBI Project No. 6218000226
USID No. 115061 Site No. SBL051
190 Santa Rosa Street, San Luis Obispo, California
guidance provided by AT&T, EBI's understanding of FCC and OSHA requirements, and common industry
practice. Barrier locations have been identified (when required) based on guidance presented in AT&T's
RF Exposure: Responsibilities, Procedures & Guidelines document, dated October 28, 2014. The following
signage is recommended at this site:
■ Yellow CAUTION 2 sign posted 12.6' below the bottom of the northern light pole antennas (21.4'
AG L).
Yellow CAUTION 2 sign posted 15.7' below the bottom of the southern light pole antennas (24'
AG L).
The signage proposed for installation at this site complies with AT&T's RF Exposure: Responsibilities,
Procedures & Guidelines document and therefore complies with FCC and OSHA requirements. Barriers
are not recommended on this site. More detailed information concerning site compliance
recommendations is presented in Section 4.0 and Appendix B of this report.
EBI Consulting ♦ 21 B Street ♦ Burlington, MA 01803 ♦ 1.800.786.2346
RF-EME Compliance Report USID No. 115061 Site No. SBLO51
EBI Project No. 6218000226 190 Santa Rosa Street, San Luis Obispo, California
1.0 FEDERAL COMMUNICATIONS COMMISSION (FCC) REQUIREMENTS
The FCC has established Maximum Permissible Exposure (MPE) limits for human exposure to
Radiofrequency Electromagnetic (RF-EME) energy fields, based on exposure limits recommended by the
National Council on Radiation Protection and Measurements (NCRP) and, over a wide range of
frequencies, the exposure limits developed by the Institute of Electrical and Electronics Engineers, Inc.
(IEEE) and adopted by the American National Standards Institute (ANSI) to replace the 1982 ANSI
guidelines. Limits for localized absorption are based on recommendations of both ANSI/IEEE and NCRP.
The FCC guidelines incorporate two separate tiers of exposure limits that are based upon
occupational/controlled exposure limits (for workers) and general publicluncontrolled exposure limits for
members of the general public.
Occupational/controlled exposure limits apply to situations in which persons are exposed as a
consequence of their employment and in which those persons who are exposed have been made fully
aware of the potential for exposure and can exercise control over their exposure. Occupational/
controlled exposure limits also apply where exposure is of a transient nature as a result of incidental
passage through a location where exposure levels may be above general public/uncontrolled limits (see
below), as long as the exposed person has been made fully aware of the potential for exposure and can
exercise control over his or her exposure by leaving the area or by some other appropriate means.
General -public/uncontrolled exposure limits apply to situations in which the general public may be
exposed or in which persons who are exposed as a consequence of their employment may not be made
fully aware of the potential for exposure or cannot exercise control over their exposure. Therefore,
members of the general public would always be considered under this category when exposure is not
employment -related, for example, in the case of a telecommunications tower that exposes persons in a
nearby residential area.
Table I and Figure I (below), which are included within the FCC's OET Bulletin 65, summarize the MPE
limits for RF emissions. These limits are designed to provide a substantial margin of safety. They vary by
frequency to take into account the different types of equipment that may be in operation at a particular
facility and are "time -averaged" limits to reflect different durations resulting from controlled and
uncontrolled exposures.
The FCC's MPEs are measured in terms of power (mW) over a unit surface area (cmz). Known as the
power density, the FCC has established an occupational MPE of 5 milliwatts per square centimeter
(mW/cmz) and an uncontrolled MPE of I mW/cm2 for equipment operating in the 1900 MHz frequency
range. For the AT&T equipment operating at 850 MHz, the FCC's occupational MPE is 2.83 mW/cmz and
an uncontrolled MPE of 0.57 mW/cmz. For the AT&T equipment operating at 700 MHz, the FCC's
occupational MPE is 2.33 mW/cmz and an uncontrolled MPE of 0.47 mW/cmz. These limits are considered
protective of these populations.
Table 1: Limits for Maximum Permissible Exposure (MPE)
(A) Limits for Occupational/Controlled Exposure
Frequency Range Electric Field Magnetic Field
Averaging Time
Power Density (S)
(MHz) Strength (E) Strength (H)
(mW/cm)
[E]'. [H]2. or S
_ (Vim) (A/m)
(minutes)
0.3-3.0
614
1.63
(100)*
6
3.0-30
1842/f
4.89/f
(9001 )*
6
30-300
_
61.4
0.163 _
--
1.0
0300
6
6
300-1,500
--
EBI Consulting ♦ 21 B Street ♦ Burlington, MA 01803 0 1.800.786.2346
RF-EME Compliance Report USID No. 115061 Site No. SBL051
EBI Project No. 6218000226 190 Santa Rosa Street, San Luis Obispo, California
Table I: Limits for Maximum Permissible Exposure (MIRE)
(A) Limits for Occupational/Controlled Exposure
Frequency Range Electric Field Magnetic Field
(MHz) Strength (E) Strength (H)
(V/m) (Alm)
1,500-100,000
(6) Limits for General Public/Uncontrolled Exposure
Frequency Range Electric Field Magnetic Field
(MHz) Strength (E) Strength (H)
1.34
614
1.63
2.19/f
Power Density (S)
(mW/cm2)
5
Power Density (S)
(mW/cm=)
NOW
.su-3uu 27.5 0.073 0.2
300-1,500 -- -- f/ 1,500
1,500-100,000E:�
-- -- 1.0
f = Frequency in (MHz)
* Plane -wave equivalent power density
Figure 1. FCC Limits for Maximum Permissible Exposure (MPE)
Plane -wave Equivalent Power Density
Occupational/Controlled Exposure
I 100 : — General Population/Uncontrolled Exposute�
1
I to ■
■
S ■
I ■
1 i----------
■ fi
0.1
0.03 0.3 3 30 ?O0 13.000 30,000
1-M 1,500 100,000
Frequency (MHz)
Averaging Time
[E]=, [HIV, or S
(minutes)
[E]', [H]', or S
30
30
30
Based on the above, the most restrictive thresholds for exposures of unlimited duration to RF energy for
several personal wireless services are summarized below:
Personal Wireless Service
Approximate
Occupational
Frequency
MIRE
Public MPE
Personal Communication (PCS)
1,950 MHz
5.00 mW/cm
1.00 mW/cm
Cellular Telephone
870 MHz
2.90 mW/cm
0.58 mW/cm
Specialized Mobile Radio
855 MHz
2.85 mW/cm
0.57 mW/cm
Long Term Evolution (LTE)
700 MHz
2.33 MW/CM2
0.47 mW/cm
Most Restrictive Freq, Range
34-300 MHz
1.00 mW/cm
0.20 mW/cm
MPE limits are designed to provide a substantial margin of safety. These limits apply for continuous
exposures and are intended to provide a prudent margin of safety for all persons, regardless of age, gender,
size, or health.
EBI Consulting ♦ 21 B Street 4 Burlington, MA 01803 ♦ 1.800.786.2346
RF-EME Compliance Report USID No. 115061 Site No. SBL051
EBI Project No. 6218000226 190 Santa Rosa Street, San Luis Obispo, California
Personal Communication (PCS) facilities used by AT&T in this area operate within a frequency range of
700-1900 MHz. Facilities typically consist of: 1) electronic transceivers (the radios or cabinets) connected
to wired telephone lines; and 2) antennas that send the wireless signals created by the transceivers to be
received by individual subscriber units (PCS telephones). Transceivers are typically connected to antennas
by coaxial cables.
Because of the short wavelength of PCS services, the antennas require line -of -site paths for good
propagation, and are typically installed above ground level. Antennas are constructed to concentrate
energy towards the horizon, with as little energy as possible scattered towards the ground or the sky.
This design, combined with the low power of PCS facilities, generally results in no possibility for exposure
to approach Maximum Permissible Exposure (MPE) levels, with the exception of areas directly in front of
the antennas.
2.0 AT&T RF EXPOSURE POLICY REQUIREMENTS
AT&T's RF Exposure: Responsibilities, Procedures & Guidelines document, dated October 28, 2014,
requires that:
I. All sites must be analyzed for RF exposure compliance;
2. All sites must have that analysis documented; and
3. All sites must have any necessary signage and barriers installed.
Pursuant to this guidance, worst -case predictive modeling was performed for the site. This modeling is
described below in Section 3.0. Lastly, based on the modeling and survey data, EBI has produced a
Compliance Plan for this site that outlines the recommended signage and barriers. The recommended
Compliance Plan for this site is described in Section 4.0.
3.0 WORST -CASE PREDICTIVE MODELING
In accordance with AT&T's RF Exposure policy, EBI performed theoretical modeling using RoofView®
software to estimate the worst -case power density at the site utility line level and ground- resulting from
operation of the antennas. RoofView® is a widely -used predictive modeling program that has been
developed by Richard Tell Associates to predict both near field and far field RF power density values for
roof -top and tower telecommunications sites produced by vertical collinear antennas that are typically
used in the cellular, PCS, paging and other communications services. The models utilize several operational
specifications for different types of antennas to produce a plot of spatially -averaged power densities that
can be expressed as a percentage of the applicable exposure limit.
For this report, EBI utilized antenna and power data provided by AT&T, and compared the resultant
worst -case MPE levels to the FCC's occupational/controlled exposure limits outlined in OET Bulletin 65.
For this report, EBI utilized antenna and power data provided by AT&T and compared the resultant worst -
case MPE levels to the FCC's occupational/controlled exposure limits outlined in OET Bulletin 65.
The assumptions used in the modeling are based upon information provided by AT&T and information
gathered from other sources. Verizon and T-Mobile also have antennas on the light pole. Information
about these antennas was included in the modeling analysis.
Based on worst -case predictive modeling, the worst -case emitted power density may exceed the FCC's
general public limit within approximately 2, 2, and I feet of AT&T's Sector A, B, and C antennas,
respectively, at the utility light level of the southern pole antennas and I foot of AT&T's Sector A, B, and
C antennas at the utility light level of the north pole antennas. Additionally, there are areas where elevated
workers may be exposed to power densities greater than the occupational limits. The worst -case emitted
power density may exceed the FCC's occupational limit within approximately 12 feet of AT&T's proposed
EBI Consulting 4 21 B Street 4 Burlington, MA 01803 • 1.800.786.2346
RF-EME Compliance Report
EBI Project No. 6218000226
USID No. 115061 Site No. SBL051
190 Santa Rosa Street, San Luis Obispo, California
antennas at the antenna face level. Workers and the general public should be informed about the presence
and locations of antennas and their associated fields.
At the nearest walking/working surfaces to the AT&T antennas, the maximum power density generated
by the AT&T antennas is approximately 26.10 percent of the FCC's general public limit (5.22 percent of
the FCC's occupational limit). The composite exposure level from all carriers on this site is approximately
194.30 percent of the FCC's general public limit (38.86 percent of the FCC's occupational limit) at the
nearest walking/working surface to each antenna. Based on worst -case predictive modeling, there are no
areas at ground level related to the proposed AT&T antennas that exceed the FCC's occupational or
general public exposure limits at this site. At ground level, the maximum power density generated by the
antennas is approximately 18.10 percent of the FCC's general public limit (3.62 percent of the FCC's
occupational limit).
There were also worst -case predicted exposures above the general public MPE in front of the Sector A,
B, and C Verizon and T-Mobile antennas. Modeling indicates that the AT&T contribution to these areas is
greater than 5% of the general public MPE and, as such, under FCC regulations, AT&T is responsible for
these predicted exceedances.
A graphical representation of the RoofView® modeling results is presented in Appendix B. It should be
noted that RoofView® is not suitable for modeling microwave dish antennas; however, these units are
designed for point-to-point operations at the elevations of the installed equipment rather than ground -
level coverage. Based on AT&T's RF Exposure: Responsibilities, Procedures & Guidelines document, dated
October 28, 2014, microwave antennas are considered compliant if they are higher than 20 feet above
any accessible walking/working surface. There are no microwaves installed at this site.
EBI Consulting • 21 B Street 4 Burlington, MA 01803 4 1.800.786.2346
r
RF-EME Compliance Report
EBI Project No. 6218000226
4.0 RECOMMENDED SIGNAGE/COMPLIANCE PLAN
USID No. 115061 Site No. SBLO51
190 Santa Rosa Street, San Luis Obispo, California
Signs are the primary means for control of access to areas where RF exposure levels may potentially
exceed the MPE. As presented in the AT&T guidance document, the signs must:
■ Be posted at a conspicuous point;
■ Be posted at the appropriate locations;
• Be readily visible; and
■ Make the reader aware of the potential risks rior to entering the affected area.
The table below presents the signs that may be used for AT&T installations.
Informational Signs i
INFO 1
INFO 2
INFO 3
Alerting Signs
•
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NOTICE I
NOTICE 2
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NOTICE DECAL
CAUTION
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ki Emusimsrnry e.¢ed the
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CAUTION I —
CAUTION 2.
ROOFTOP
ROOFTOP
QCAUTION
i
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neew nqueney nam near come
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enrennes may a,aeee Fcc rvles
ror hymen exposure
� , .•.ak��_I�,,I .� .,♦„�.
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CAUTION -
TOWER
WARNING
EBI Consulting 4 21 B Street 4 Burlington, MA 01803 ♦ 1.800.786.2346
A.
RF-EME Compliance Report USID No. 115061 Site No. SBL051
EBI Project No. 6218000226 190 Santa Rosa Street, San Luis Obispo, California
Based upon protocols presented in AT&T's RF Exposure: Responsibilities, Procedures & Guidelines
document, dated October 28, 2014, and additional guidance provided by AT&T, the following signage is
recommended on the site:
Yellow CAUTION 2 sign posted 12.6' below the bottom of the northern light pole antennas (21.4'
AG L).
■ Yellow CAUTION 2 sign posted 15.7' below the bottom of the southern light pole antennas (24'
AG L).
No barriers are required for this site. It is important to note that this Signage Plan is specific for AT&T
antennas only, and does not address RF emissions of other carrier antennas.
5.0 SUMMARY AND CONCLUSIONS
EBI has prepared this Radiofrequency Emissions Compliance Report for the proposed AT&T
telecommunications equipment at the site located at 190 Santa Rosa Street in San Luis Obispo, California.
EBI has conducted theoretical modeling to estimate the worst -case power density from AT&T antennas
and other carrier antennas to document potential MPE levels at this location and ensure that site control
measures are adequate to meet FCC and OSHA requirements, as well as AT&T's corporate RF safety
policies. As presented in the preceding sections, based on worst -case predictive modeling, the worst -case
emitted power density may exceed the FCC's general public limit within approximately 2 feet of ATT's
proposed antennas at the utility line level. Modeling also indicates that the worst -case emitted power
density will not exceed the FCC's occupational limit at the utility line level. Additionally, there are areas
where elevated workers may be exposed to power densities greater than the occupational limits. The
worst -case emitted power density may exceed the FCC's occupational limit within approximately 12 feet
of AT&T's proposed antennas at the antenna face level. Workers and the general public should be
informed about the presence and locations of antennas and their associated fields.
Signage is recommended at the site as presented in Section 4.0 and Appendix B. Posting of the signage
brings the site into compliance with FCC rules and regulations and AT&T's corporate RF safety policies.
Workers or members of the general public accessing areas directly in front of the other carrier antennas
should contact the carrier and/or landlord to determine appropriate setbacks or measures to safely
occupy those areas.
6.0 LIMITATIONS
This report was prepared for the use of AT&T Mobility, LLC to meet requirements outlined in AT&T's
corporate RF safety guidelines. It was performed in accordance with generally accepted practices of other
consultants undertaking similar studies at the same time and in the same locale under like circumstances.
The conclusions provided by EBI are based solely on the information provided by the client. The
observations in this report are valid on the date of the investigation. Any additional information that
becomes available concerning the site should be provided to EBI so that our conclusions may be revised
and modified, if necessary. This report has been prepared in accordance with Standard Conditions for
Engagement and authorized proposal, both of which are integral parts of this report. No other warranty,
expressed or implied, is made.
EBI Consulting ♦ 21 B Street ♦ Burlington, MA 01803 4 1.800.786.2346
RF-EME Compliance Report
EBI Project No. 6218000226
USID No. 115061 Site No. SBL051
190 Santa Rosa Street, San Luis Obispo, California
Appendix A
Personnel Certifications
EBI Consulting ♦ 21 B Street ♦ Burlington, MA 01803 ♦ 1.800.786.2346
RF-EME Compliance Report
EBI Project No. 6218000226
Preparer Certification
I, Ian Swanson, state that:
USID No. 115061 Site No. SBLO51
190 Santa Rosa Street, San Luis Obispo, California
• I am an employee of EnviroBusiness Inc. (d/b/a EBI Consulting), which provides RF-EME safety and
compliance services to the wireless communications industry.
• 1 have successfully completed RF-EME safety training, and I am aware of the potential hazards from
RF-EME and would be classified "occupational' under the FCC regulations.
• I am familiar with the FCC rules and regulations as well as OSHA regulations both in general and
as they apply to RF-EME exposure.
■ I have been trained in on the procedures outlined in AT&T's RF Exposure: Responsibilities,
Procedures & Guidelines document (dated October 28, 2014) and on RF-EME modeling using
RoofViewO modeling software.
■ I have reviewed the data provided by the client and incorporated it into this Site Compliance
Report such that the information contained in this report is true and accurate to the best of my
knowledge.
EBI Consulting ♦ 21 B Street 4 Burlington, MA 01803 • 1.800.786.2346
RF-EME Compliance Report
EBI Project No. 6218000226 U51❑ No. I i 506I Site No. 58L05 I
190 Santa Rosa Street, San Luis Obispo, California
Appendix B
AT&T Compliance/Signage Plan
EBI Consulting ♦ 21 B Street ♦ Burlington, MA 01803 ♦ 1.800.786.2346
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EBI Project No. 6218000226
USID No. 115061 Site 1
190 Santa Rosa Street, San Luis Obispc
APPENDIX C
ROOFVIEW@ EXPORT FILE
EBI Consulting • 21 B Street • Burlington, MA 01803 4 1.800.786.2346
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