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Detailed Survey Results for FCPS Sites With Monopoles
Centreville HS
Chantilly HS
TJHSST
Langley HS
South Lakes HS
Westgate ES

 

 

Centreville High School

 

At Centreville High School, thirty-one (31) exterior survey locations and ten (10) interior survey locations measured and recorded the total PCS RF emission, PCS cell phone receive band (1850 to 1910 MHz), the PCS cell phone base station transmit band (1930 to 1990 MHz), the local radio FM transmit bands (88 MHz to 107.9 MHz) and the local television transmit bands (174.0 MHz to 806.0 MHz), consisting of local television Channels 7 through 70.  This selected FM/TV measurement does not take into consideration local television Channels 4 and 5, which have a transmit frequency lower than the SRM-3000 can read.

 

Analysis of the data sets, shows that they are distributed log normal rather than normally distributed. The geometric mean is less affected by extreme values than is the arithmetic mean (average) and is useful as a measure of central tendency for log normal distributions.  That being said, the geometric mean would be more appropriate than the arithmetic mean in analyzing the data.

 

Outside the Building PCS Frequency Field Survey

 

The following graph represents the outside the building measurements at Centreville High School as they compare to the FCC exposure standard for the PCS frequency band of 1 milliwatt per centimeter squared (mW/cm²) or 1,000 microwatts per centimeter squared (uW/cm²).

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 1,000 uW/cm²
• Centreville HS Exterior Total PCS Maximum Measured Value: 0.0468888 uW/cm²
• Centreville HS Exterior Total  PCS Median Measured Value: 0.0085527 uW/cm²
• Centreville HS Exterior Total PCS Minimum Measured Value: 0.0004866 uW/cm²
• Centreville HS Exterior Total PCS Geometric Mean  Measured Value: 0.00627472 uW/cm²
   

The Centreville High School outside the building total PCS geometric average represents a measured value 159,370 times below the FCC standard.

 

 

 

Inside the Building PCS Frequency Field Survey

 

The following graph represents the inside the building measurements at Centreville High School as they compare to the FCC exposure standard for the PCS frequency band of 1 milliwatt per centimeter squared (mW/cm²) or 1,000 microwatts per centimeter squared (uW/cm²).

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 1,000 uW/cm²
• Centreville HS Interior Total PCS Maximum Measured Value: 0.0027389 uW/cm²
• Centreville HS Interior Total  PCS Median Measured Value: 0.00037725 uW/cm²
• Centreville HS Interior Total PCS Minimum Measured Value: 0.0002864 uW/cm²
• Centreville HS Interior Total PCS Geometric Mean  Measured Value: 0.000605434 uW/cm²

 

The Centreville High School inside the building total PCS geometric average represents a measured value 1,651,708 times below the FCC standard.

 

 

A Comparative View of Centreville High School Outside the Building PCS Frequency Field Survey vs. the Centreville High School Inside the Building PCS Frequency Field Survey

 

The Centreville High School outside the building total PCS geometric average represents a measured value 159,370 times below the FCC standard.

The Centreville High School inside the building total PCS geometric average represents a measured value 1,651,708 times below the FCC standard.

 

 

Other RF Emissions at Centreville High School

 

Outside the Building Selected FM/TV Frequency Field Survey

 

The following graph represents the outside the building measurements at Centreville High School as they compare to the FCC exposure standard for the FM/TV frequencies of 0.2 milliwatt per centimeter squared (mW/cm²) or 200 microwatts per centimeter squared (uW/cm²).  Though the FCC exposure standard for the television frequencies from 301 to 806 MHz ranges from 201 uW/cm² to 537 uW/cm² and the FCC exposure standard for the FM radio/television frequencies 88 to300 MHz is 200 uW/cm²  , the most conservative FCC exposure standard of 200 uW/cm² was used in comparing actual selected FM/television measurements.

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 200 uW/cm²
• Centreville HS Exterior Selected FM/TV Maximum Measured Value: 0.008964 uW/cm²
• Centreville HS Exterior Selected FM/TV Median Measured Value: 0.003117 uW/cm²
• Centreville HS Exterior Selected FM/TV Minimum Measured Value: 0.00228 uW/cm²
• Centreville HS Exterior Selected FM/TV Geometric Mean  Measured Value: 0.003375843 uW/cm²

 

The Centreville High School outside the building selected FM/TV geometric average represents a measured value 59,244 times below the FCC standard.

 

 

Inside the Building Selected FM/TV Frequencies Field Survey

 

The following graph represents the inside the building measurements at Centreville High School as they compare to the FCC exposure standard for the FM/TV frequencies of 0.2 milliwatt per centimeter squared (mW/cm²) or 200 microwatts per centimeter squared (uW/cm²).  Though the FCC exposure standard for the television frequencies from 301 to 806 MHz ranges from 201 uW/cm² to 537 uW/cm² and the FCC exposure standard for the FM radio/television frequencies 88 to300 MHz is 200 uW/cm²  , the most conservative FCC exposure standard of 200 uW/cm² was used in comparing actual selected FM/television measurements.

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 200 uW/cm²
• Centreville HS Interior Selected FM/TV Maximum Measured Value: 0.006512 uW/cm²
• Centreville HS Interior Selected FM/TV Median Measured Value: 0.002637 uW/cm²
• Centreville HS Interior Selected FM/TV Minimum Measured Value: 0.002164 uW/cm²
• Centreville HS Interior Selected FM/TV Geometric Mean  Measured Value: 0.003090047 uW/cm²
   

The Centreville High School inside the building selected FM/TV geometric average represents a measured value 64,724 times below the FCC standard.

 

 

 

A Comparative View of Centreville High School Outside the Building selected FM/TV Frequencies Field Survey vs. the Centreville High School Inside the Building FM/TV Frequencies Field Survey

 

The Centreville High School outside the building selected FM/TV geometric average represents a measured value 59,244 times below the FCC standard.

The Centreville High School inside the building selected FM/TV geometric average represents a measured value 64,724 times below the FCC standard.

 

Chantilly High School

 

At Chantilly High School, twenty-six (26) exterior survey locations and ten (10) interior survey locations measured and recorded the total PCS RF emission, PCS cell phone receive band (1850 to 1910 MHz), the PCS cell phone base station transmit band (1930 to 1990 MHz), the local radio FM transmit bands (88 MHz to 107.9 MHz) and the local television transmit bands (174.0 MHz to 806.0 MHz), consisting of local television Channels 7 through 70. This selected FM/TV measurement does not take into consideration local television Channels 4 and 5, which have a transmit frequency lower than the SRM-3000 can read.

 

Analysis of the data sets, shows that they are distributed log normal rather than normally distributed. The geometric mean is less affected by extreme values than is the arithmetic mean (average) and is useful as a measure of central tendency for log normal distributions.  That being said, the geometric mean would be more appropriate than the arithmetic mean in analyzing the data.

 

Outside the Building PCS Frequency Field Survey

 

The following graph represents the outside the building measurements at Chantilly High School as they compare to the FCC exposure standard for the PCS frequency band 1 milliwatt per centimeter squared (mW/cm²) or 1,000 microwatts per centimeter squared (uW/cm²).

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 1,000 uW/cm²
• Chantilly HS Exterior Total PCS Maximum Measured Value: 0.0250163 uW/cm²
• Chantilly HS Exterior Total  PCS Median Measured Value: 0.0073577 uW/cm²
• Chantilly HS Exterior Total PCS Minimum Measured Value: 0.0022391 uW/cm²
• Chantilly HS Exterior Total PCS Geometric Mean Measured Value: 0.006164752 uW/cm²

 

The Chantilly High School outside the building total PCS geometric average represents a measured value 162,213 times below the FCC standard.

 

 

 

Inside the Building PCS Frequency Field Survey

 

The following graph represents the inside the building measurements at Chantilly High School as they compare to the FCC exposure standard for the PCS frequency band 1 milliwatt per centimeter squared (mW/cm²) or 1,000 microwatts per centimeter squared (uW/cm²).

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 1,000 uW/cm²
• Chantilly HS Interior Total PCS Maximum Measured Value: 0.0046895 uW/cm²
• Chantilly HS Interior Total  PCS Median Measured Value: 0.0012467 uW/cm²
• Chantilly HS Interior Total PCS Minimum Measured Value: 0.0002802 uW/cm²
• Chantilly HS Interior Total PCS Geometric Mean Measured Value: 0.001426839 uW/cm²

 

The Chantilly High School inside the building total PCS geometric average represents a measured value 700,850 times below the FCC standard.

 

 

A Comparative View of Chantilly High School Outside the Building PCS Frequency Field Survey vs. the Chantilly High School Inside the Building PCS Frequency Field Survey

 

The Chantilly High School outside the building total PCS geometric average represents a measured value 162,213 times below the FCC standard.

The Chantilly High School inside the building total PCS geometric average represents a measured value 700,850 times below the FCC standard.

 

 

Other RF Emissions at Chantilly High School

 

Outside the Building Selected FM/TV Frequency Field Survey

 

The following graph represents the outside the building measurements at Chantilly High School as they compare to the FCC exposure standard for the FM/TV frequencies of 0.2 milliwatt per centimeter squared (mW/cm²) or 200 microwatts per centimeter squared (uW/cm²).  Though the FCC exposure standard for the television frequencies from 301 to 806 MHz ranges from 201 uW/cm² to 537 uW/cm² and the FCC exposure standard for the FM radio/television frequencies 88 to300 MHz is 200 uW/cm²  , the most conservative FCC exposure standard of 200 uW/cm² was used in comparing actual selected FM/television measurements.

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 200 uW/cm²
• Chantilly HS Exterior Selected FM/TV Maximum Measured Value: 0.005282 uW/cm²
• Chantilly HS Exterior Selected FM/TV Median Measured Value: 0.0026825 uW/cm²
• Chantilly HS Exterior Selected FM/TV Minimum Measured Value: 0.00229 uW/cm²
• Chantilly HS Exterior Selected FM/TV Geometric Mean Measured Value: 0.002886096 uW/cm²

 

The Chantilly High School outside the building selected FM/TV geometric average represents a measured value 69,298 times below the FCC standard.

 

 

 

Inside the Building Selected FM/TV Frequencies Field Survey

 

The following graph represents the inside the building measurements at Chantilly High School as they compare to the FCC exposure standard for the FM/TV frequencies of 0.2 milliwatt per centimeter squared (mW/cm²) or 200 microwatts per centimeter squared (uW/cm²).  Though the FCC exposure standard for the television frequencies from 301 to 806 MHz ranges from 201 uW/cm² to 537 uW/cm² and the FCC exposure standard for the FM radio/television frequencies 88 to300 MHz is 200 uW/cm²  , the most conservative FCC exposure standard of 200 uW/cm² was used in comparing actual selected FM/television measurements.

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 200 uW/cm²
• Chantilly HS Interior Selected FM/TV Maximum Measured Value: 0.00245 uW/cm²
• Chantilly HS Interior Selected FM/TV Median Measured Value: 0.0023105 uW/cm²
• Chantilly HS Interior Selected FM/TV Minimum Measured Value: 0.002154 uW/cm²
• Chantilly HS Interior Selected FM/TV Geometric Mean Measured Value: 0.00230703 uW/cm²

 

The Chantilly High School inside the building selected FM/TV geometric average represents a measured value 86,692 times below the FCC standard.

 

A Comparative View of Chantilly High School Outside the Building selected FM/TV Frequencies Field Survey vs. the Chantilly High School Inside the Building FM/TV Frequencies Field Survey

 

The Chantilly High School outside the building selected FM/TV geometric average represents a measured value 69,298 times below the FCC standard.

The Chantilly High School inside the building selected FM/TV geometric average represents a measured value 86,692 times below the FCC standard.

 

Thomas Jefferson High School for Science and Technology

 

At TJHSST, thirty-one (31) exterior survey locations and five (5) interior survey locations measured and recorded the total PCS RF emission, PCS cell phone receive band (1850 to 1910 MHz), the PCS cell phone base station transmit band (1930 to 1990 MHz), the local radio FM transmit bands (88 MHz to 107.9 MHz) and the local television transmit bands (174.0 MHz to 806.0 MHz), consisting of local television Channels 7 through 70. This selected FM/TV measurement does not take into consideration local television Channels 4 and 5, which have a transmit frequency lower than the SRM-3000 can read.

 

Analysis of the data sets, shows that they are distributed log normal rather than normally distributed. The geometric mean is less affected by extreme values than is the arithmetic mean (average) and is useful as a measure of central tendency for log normal distributions.  That being said, the geometric mean would be more appropriate than the arithmetic mean in analyzing the data.

 

Outside the Building PCS Frequency Field Survey

 

The following graph represents the outside the building measurements at TJHSST as they compare to the FCC exposure standard for the PCS frequency band 1 milliwatt per centimeter squared (mW/cm²) or 1,000 microwatts per centimeter squared (uW/cm²).

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 1,000 uW/cm²
• TJHSST Total PCS Maximum Measured Value: 0.0211746 uW/cm²
• TJHSST Total  PCS Median Measured Value: 0.0050799 uW/cm²
• TJHSST Total PCS Minimum Measured Value: 0.0007956 uW/cm²
• TJHSST Total PCS Geometric Mean Measured Value: 0.005181045 uW/cm²

 

The TJHSST outside the building total PCS geometric average represents a measured value 193,011 times below the FCC standard.

 

 

 

Inside the Building PCS Frequency Field Survey

 

The following graph represents the inside the building measurements at TJHSST as they compare to the FCC exposure standard for the PCS frequency band 1 milliwatt per centimeter squared (mW/cm²) or 1,000 microwatts per centimeter squared (uW/cm²).

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 1,000 uW/cm²
• TJHSST Total PCS Maximum Measured Value: 0.0006054 uW/cm²
• TJHSST Total  PCS Median Measured Value: 0.0003318 uW/cm²
• TJHSST Total PCS Minimum Measured Value: 0.0002841 uW/cm²
• TJHSST Total PCS Geometric Mean Measured Value:0.000360352 uW/cm²

 

The TJHSST inside the building total PCS geometric average represents a measured value 2,775,064 times below the FCC standard.

 

 

A Comparative View of TJHSST Outside the Building PCS Frequency Field Survey vs. the TJHSST Inside the Building PCS Frequency Field Survey

 

The TJHSST outside the building total PCS geometric average represents a measured value 193,011 times below the FCC standard.

The TJHSST inside the building total PCS geometric average represents a measured value 2,775,064 times below the FCC standard.

 

Other RF Emissions at TJHSST

 

Outside the Building Selected FM/TV Frequency Field Survey

 

The following graph represents the outside the building measurements at TJHSST as they compare to the FCC exposure standard for the FM/TV frequencies of 0.2 milliwatt per centimeter squared (mW/cm²) or 200 microwatts per centimeter squared (uW/cm²).  Though the FCC exposure standard for the television frequencies from 301 to 806 MHz ranges from 201 uW/cm² to 537 uW/cm² and the FCC exposure standard for the FM radio/television frequencies 88 to300 MHz is 200 uW/cm²  , the most conservative FCC exposure standard of 200 uW/cm² was used in comparing actual selected FM/television measurements.

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 200 uW/cm²
• TJHSST Exterior Selected FM/TV Maximum Measured Value: 0.005218 uW/cm²
• TJHSST Exterior Selected FM/TV Median Measured Value: 0.003677 uW/cm²
• TJHSST Exterior Selected FM/TV Minimum Measured Value: 0.002937 uW/cm²
• TJHSST Exterior Selected FM/TV Geometric Mean Measured Value: 0.003721438 uW/cm²

 

The TJHSST outside the building selected FM/TV geometric average represents a measured value 53,743 times below the FCC standard.

 

 

 

Inside the Building Selected FM/TV Frequencies Field Survey

 

The following graph represents the inside the building measurements at TJHSST as they compare to the FCC exposure standard for the FM/TV frequencies of 0.2 milliwatt per centimeter squared (mW/cm²) or 200 microwatts per centimeter squared (uW/cm²).  Though the FCC exposure standard for the television frequencies from 301 to 806 MHz ranges from 201 uW/cm² to 537 uW/cm² and the FCC exposure standard for the FM radio/television frequencies 88 to300 MHz is 200 uW/cm²  , the most conservative FCC exposure standard of 200 uW/cm² was used in comparing actual selected FM/television measurements.

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 200 uW/cm²
• TJHSST Interior Selected FM/TV Maximum Measured Value: 0.002948 uW/cm²
• TJHSST Interior Selected FM/TV Median Measured Value: 0.002395 uW/cm²
• TJHSST Interior Selected FM/TV Minimum Measured Value: 0.001862 uW/cm²
• TJHSST Interior Selected FM/TV Geometric Mean Measured Value: 0.002394741 uW/cm²

 

The TJHSST inside the building selected FM/TV geometric average represents a measured value 83,516 times below the FCC standard.

 

 

A Comparative View of TJHSST Outside the Building selected FM/TV Frequencies Field Survey vs. the TJHSST Inside the Building FM/TV Frequencies Field Survey

 

The TJHSST outside the building selected FM/TV geometric average represents a measured value 53,743 times below the FCC standard.

The TJHSST inside the building selected FM/TV geometric average represents a measured value 83,516 times below the FCC standard.

Langley High School

 

At Langley High School, thirty (30) exterior survey locations and ten (10) interior survey locations measured and recorded the total PCS RF emission, PCS cell phone receive band (1850 to 1910 MHz), the PCS cell phone base station transmit band (1930 to 1990 MHz), the local radio FM transmit bands (88 MHz to 107.9 MHz) and the local television transmit bands (174.0 MHz to 806.0 MHz), consisting of local television Channels 7 through 70. This selected FM/TV measurement does not take into consideration local television Channels 4 and 5, which have a transmit frequency lower than the SRM-3000 can read.

 

Analysis of the data sets, shows that they are distributed log normal rather than normally distributed. The geometric mean is less affected by extreme values than is the arithmetic mean (average) and is useful as a measure of central tendency for log normal distributions.  That being said, the geometric mean would be more appropriate than the arithmetic mean in analyzing the data.

 

Outside the Building PCS Frequency Field Survey

 

The following graph represents the outside the building measurements at Langley High School as they compare to the FCC exposure standard for the PCS frequency band 1 milliwatt per centimeter squared (mW/cm²) or 1,000 microwatts per centimeter squared (uW/cm²).

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 1,000 uW/cm²
• Langley HS Exterior Total PCS Maximum Measured Value: 0.0869778 uW/cm²
• Langley HS Exterior Total  PCS Median Measured Value: 0.0214528 uW/cm²
• Langley HS Exterior Total PCS Minimum Measured Value: 0.0013276 uW/cm²
• Langley HS Exterior Total PCS Geometric Mean Measured Value: 0.019029419 uW/cm²

 

The Langley High School outside the building total PCS geometric average represents a measured value 52,550 times below the FCC standard.

 

 

 

Inside the Building PCS Frequency Field Survey

 

The following graph represents the inside the building measurements at Langley High School as they compare to the FCC exposure standard for the PCS frequency band 1 milliwatt per centimeter squared (mW/cm²) or 1,000 microwatts per centimeter squared (uW/cm²).

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 1,000 uW/cm²
• Langley HS Interior Total PCS Maximum Measured Value: 0.0050702 uW/cm²
• Langley HS Interior Total  PCS Median Measured Value: 0.0007502 uW/cm²
• Langley HS Interior Total PCS Minimum Measured Value: 0.0003799 uW/cm²
• Langley HS Interior Total PCS Geometric Mean Measured Value: 0.001107029 uW/cm²

 

The Langley High School inside the building total PCS geometric average represents a measured value 903,319 times below the FCC standard.

 

 

A Comparative View of Langley High School Outside the Building PCS Frequency Field Survey vs. the Langley High School Inside the Building PCS Frequency Field Survey

 

The Langley High School outside the building total PCS geometric average represents a measured value 52,550 times below the FCC standard.

The Langley High School inside the building total PCS geometric average represents a measured value 903,319 times below the FCC standard.

 

 

Other RF Emissions at Langley High School

 

Outside the Building Selected FM/TV Frequency Field Survey

 

The following graph represents the outside the building measurements at Langley High School as they compare to the FCC exposure standard for the FM/TV frequencies of 0.2 milliwatt per centimeter squared (mW/cm²) or 200 microwatts per centimeter squared (uW/cm²).  Though the FCC exposure standard for the television frequencies from 301 to 806 MHz ranges from 201 uW/cm² to 537 uW/cm² and the FCC exposure standard for the FM radio/television frequencies 88 to300 MHz is 200 uW/cm²  , the most conservative FCC exposure standard of 200 uW/cm² was used in comparing actual selected FM/television measurements.

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 200 uW/cm²
• Langley HS Exterior Selected FM/TV Maximum Measured Value: 0.3078 uW/cm²
• Langley HS Exterior Selected FM/TV Median Measured Value: 0.03791 uW/cm²
• Langley HS Exterior Selected FM/TV Minimum Measured Value: 0.0104 uW/cm²
• Langley HS Exterior Selected FM/TV Geometric Mean Measured Value: 0.04547706 uW/cm²

 

The Langley High School outside the building selected FM/TV geometric average represents a measured value 4,398 times below the FCC standard.

 

 

 

Inside the Building Selected FM/TV Frequencies Field Survey

 

The following graph represents the inside the building measurements at Langley High School as they compare to the FCC exposure standard for the FM/TV frequencies of 0.2 milliwatt per centimeter squared (mW/cm²) or 200 microwatts per centimeter squared (uW/cm²).  Though the FCC exposure standard for the television frequencies from 301 to 806 MHz ranges from 201 uW/cm² to 537 uW/cm² and the FCC exposure standard for the FM radio/television frequencies 88 to300 MHz is 200 uW/cm²  , the most conservative FCC exposure standard of 200 uW/cm² was used in comparing actual selected FM/television measurements.

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 200 uW/cm²
• Langley HS Interior Selected FM/TV Maximum Measured Value: 0.008189 uW/cm²
• Langley HS Interior Selected FM/TV Median Measured Value: 0.002991 uW/cm²
• Langley HS Interior Selected FM/TV Minimum Measured Value: 0.002273 uW/cm²
• Langley HS Interior Selected FM/TV Geometric Mean Measured Value: 0.003283398 uW/cm²

 

The Langley High School inside the building selected FM/TV geometric average represents a measured value 60,913 times below the FCC standard.

 

A Comparative View of Langley High School Outside the Building selected FM/TV Frequencies Field Survey vs. the Langley High School Inside the Building FM/TV Frequencies Field Survey

 

The Langley High School outside the building selected FM/TV geometric average represents a measured value 4,398 times below the FCC standard.

The Langley High School inside the building selected FM/TV geometric average represents a measured value 60,913 times below the FCC standard.

South Lakes High School

 

At South Lakes High School, thirty (30) exterior survey locations and eight (8) interior survey locations measured and recorded the total PCS RF emission, PCS cell phone receive band (1850 to 1910 MHz), the PCS cell phone base station transmit band (1930 to 1990 MHz), the local radio FM transmit bands (88 MHz to 107.9 MHz) and the local television transmit bands (174.0 MHz to 806.0 MHz), consisting of local television Channels 7 through 70. This selected FM/TV measurement does not take into consideration local television Channels 4 and 5, which have a transmit frequency lower than the SRM-3000 can read.

 

Analysis of the data sets, shows that they are distributed log normal rather than normally distributed. The geometric mean is less affected by extreme values than is the arithmetic mean (average) and is useful as a measure of central tendency for log normal distributions.  That being said, the geometric mean would be more appropriate than the arithmetic mean in analyzing the data.

 

Outside the Building PCS Frequency Field Survey

 

The following graph represents the outside the building measurements at South Lakes High School as they compare to the FCC exposure standard for the PCS frequency band 1 milliwatt per centimeter squared (mW/cm²) or 1,000 microwatts per centimeter squared (uW/cm²).

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 1,000 uW/cm²
• South Lakes HS Exterior Total PCS Maximum Measured Value: 0.0335885 uW/cm²
• South Lakes HS Exterior Total  PCS Median Measured Value: 0.0091317 uW/cm²
• South Lakes HS Exterior Total PCS Minimum Measured Value: 0.0007698 uW/cm²
• South Lakes HS Exterior Total PCS Geometric Mean Measured Value: 0.008963121 uW/cm²

 

The South Lakes High School outside the building total PCS geometric average represents a measured value 111,568 times below the FCC standard.

 

 

 

Inside the Building PCS Frequency Field Survey

 

The following graph represents the inside the building measurements at South Lakes High School as they compare to the FCC exposure standard for the PCS frequency band 1 milliwatt per centimeter squared (mW/cm²) or 1,000 microwatts per centimeter squared (uW/cm²).

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 1,000 uW/cm²
• South Lakes HS Interior Total PCS Maximum Measured Value: 0.0022327 uW/cm²
• South Lakes HS Interior Total  PCS Median Measured Value: 0.00076155 uW/cm²
• South Lakes HS Interior Total PCS Minimum Measured Value: 0.0003143 uW/cm²
• South Lakes HS Interior Total PCS Geometric Mean Measured Value: 0.000795987 uW/cm²

 

The South Lakes High School inside the building total PCS geometric average represents a measured value 1,256,302 times below the FCC standard.

 

 

A Comparative View of South Lakes High School Outside the Building PCS Frequency Field Survey vs. the South Lakes High School Inside the Building PCS Frequency Field Survey

 

The South Lakes High School outside the building total PCS geometric average represents a measured value 111,568 times below the FCC standard.

The South Lakes High School inside the building total PCS geometric average represents a measured value 1,256,302 times below the FCC standard.

 

Other RF Eemissions at South Lakes High School

 

Outside the building selected FM/TV Frequency Field Survey

 

The following graph represents the outside the building measurements at South Lakes High School as they compare to the FCC exposure standard for the FM/TV frequencies of 0.2 milliwatt per centimeter squared (mW/cm²) or 200 microwatts per centimeter squared (uW/cm²).  Though the FCC exposure standard for the television frequencies from 301 to 806 MHz ranges from 201 uW/cm² to 537 uW/cm² and the FCC exposure standard for the FM radio/television frequencies 88 to300 MHz is 200 uW/cm²  , the most conservative FCC exposure standard of 200 uW/cm² was used in comparing actual selected FM/television measurements.

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 200 uW/cm²
• South Lakes HS Exterior Selected FM/TV Maximum Measured Value: 0.005736 uW/cm²
• South Lakes HS Exterior Selected FM/TV Median Measured Value: 0.003404 uW/cm²
• South Lakes HS Exterior Selected FM/TV Minimum Measured Value: 0.002505 uW/cm²
• South Lakes HS Exterior Selected FM/TV Geometric Mean Measured Value: 0.003524264 uW/cm²

 

The South Lakes High School outside the building selected FM/TV geometric average represents a measured value 56,749 times below the FCC standard.

 

 

 

Inside the Building Selected FM/TV Frequencies Field Survey

 

The following graph represents the inside the building measurements at South Lakes High School as they compare to the FCC exposure standard for the FM/TV frequencies of 0.2 milliwatt per centimeter squared (mW/cm²) or 200 microwatts per centimeter squared (uW/cm²).  Though the FCC exposure standard for the television frequencies from 301 to 806 MHz ranges from 201 uW/cm² to 537 uW/cm² and the FCC exposure standard for the FM radio/television frequencies 88 to300 MHz is 200 uW/cm²  , the most conservative FCC exposure standard of 200 uW/cm² was used in comparing actual selected FM/television measurements.

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 200 uW/cm²
• South Lakes HS Interior Selected FM/TV Maximum Measured Value: 0.002366 uW/cm²
• South Lakes HS Interior Selected FM/TV Median Measured Value: 0.0022475 uW/cm²
• South Lakes HS Interior Selected FM/TV Minimum Measured Value: 0.002183 uW/cm²
• South Lakes HS Interior Selected FM/TV Geometric Mean Measured Value: 0.0022562 uW/cm²

 

The South Lakes High School inside the building selected FM/TV geometric average represents a measured value 88,645 times below the FCC standard.

 

 

A Comparative View of South Lakes High School Outside the Building selected FM/TV Frequencies Field Survey vs. the South Lakes High School Inside the Building FM/TV Frequencies Field Survey

 

The South Lakes High School outside the building selected FM/TV geometric average represents a measured value 56,749 times below the FCC standard.

The South Lakes High School inside the building selected FM/TV geometric average represents a measured value 88,645 times below the FCC standard. 

Westgate Elementary School

 

At Westgate Elementary School, twenty-two (22) exterior survey locations and eleven (11) interior survey locations measured and recorded the total PCS RF emission, PCS cell phone receive band (1850 to 1910 MHz), the PCS cell phone base station transmit band (1930 to 1990 MHz), the local radio FM transmit bands (88 MHz to 107.9 MHz) and the local television transmit bands (174.0 MHz to 806.0 MHz), consisting of local television Channels 7 through 70. This selected FM/TV measurement does not take into consideration local television Channels 4 and 5, which have a transmit frequency lower than the SRM-3000 can read.

 

Analysis of the data sets, shows that they are distributed log normal rather than normally distributed. The geometric mean is less affected by extreme values than is the arithmetic mean (average) and is useful as a measure of central tendency for log normal distributions.  That being said, the geometric mean would be more appropriate than the arithmetic mean in analyzing the data.

 

Outside the Building PCS Frequency Field Survey

 

The following graph represents the outside the building measurements at Westgate Elementary School as they compare to the FCC exposure standard for the PCS frequency band 1 milliwatt per centimeter squared (mW/cm²) or 1,000 microwatts per centimeter squared (uW/cm²).

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 1,000 uW/cm²
• Westgate ES Exterior Total PCS Maximum Measured Value: 0.0585861 uW/cm²
• Westgate ES Exterior Total  PCS Median Measured Value: 0.0188777 uW/cm²
• Westgate ES Exterior Total PCS Minimum Measured Value: 0.0007406 uW/cm²
• Westgate ES Exterior Total PCS Geometric Mean Measured Value: 0.00996311 uW/cm²

 

The Westgate Elementary School outside the building total PCS geometric average represents a measured value 100,370 times below the FCC standard.

 

 

 

Inside the Building PCS Frequency Field Survey

 

The following graph represents the inside the building measurements at Westgate Elementary School as they compare to the FCC exposure standard for the PCS frequency band 1 milliwatt per centimeter squared (mW/cm²) or 1,000 microwatts per centimeter squared (uW/cm²).

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 1,000 uW/cm²
• Westgate ES Interior Total PCS Maximum Measured Value: 0.002788 uW/cm²
• Westgate ES Interior Total  PCS Median Measured Value: 0.0007328 uW/cm²
• Westgate ES Interior Total PCS Minimum Measured Value: 0.0003021 uW/cm²
• Westgate ES Interior Total PCS Geometric Mean Measured Value: 0.00084026 uW/cm²

 

The Westgate Elementary School inside the building total PCS geometric average represents a measured value 1,190,108 times below the FCC standard.

 

 

A Comparative View of Westgate Elementary School Outside the Building PCS Frequency Field Survey vs. the Westgate Elementary School Inside the Building PCS Frequency Field Survey

 

The Westgate Elementary School outside the building total PCS geometric average represents a measured value 100,370 times below the FCC standard.

The Westgate Elementary School inside the building total PCS geometric average represents a measured value 1,190,108 times below the FCC standard.

 

Other RF Emissions at Westgate Elementary School

 

Outside the Building Selected FM/TV Frequency Field Survey

 

The following graph represents the outside the building measurements at Westgate Elementary School as they compare to the FCC exposure standard for the FM/TV frequencies of 0.2 milliwatt per centimeter squared (mW/cm²) or 200 microwatts per centimeter squared (uW/cm²).  Though the FCC exposure standard for the television frequencies from 301 to 806 MHz ranges from 201 uW/cm² to 537 uW/cm² and the FCC exposure standard for the FM radio/television frequencies 88 to300 MHz is 200 uW/cm²  , the most conservative FCC exposure standard of 200 uW/cm² was used in comparing actual selected FM/television measurements.

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 200 uW/cm²
• Westgate ES Exterior Selected FM/TV Maximum Measured Value: 0.4988 uW/cm²
• Westgate ES Exterior Selected FM/TV Median Measured Value: 0.05277 uW/cm²
• Westgate ES Exterior Selected FM/TV Minimum Measured Value: 0.0218 uW/cm²
• Westgate ES Exterior Selected FM/TV Geometric Mean Measured Value: 0.057315789 uW/cm²

 

The Westgate Elementary School outside the building selected FM/TV geometric average represents a measured value 3,489 times below the FCC standard.

 

 

 

Inside the building selected FM/TV Frequencies Field Survey

 

The following graph represents the inside the building measurements at Westgate Elementary School as they compare to the FCC exposure standard for the FM/TV frequencies of 0.2 milliwatt per centimeter squared (mW/cm²) or 200 microwatts per centimeter squared (uW/cm²).  Though the FCC exposure standard for the television frequencies from 301 to 806 MHz ranges from 201 uW/cm² to 537 uW/cm² and the FCC exposure standard for the FM radio/television frequencies 88 to300 MHz is 200 uW/cm²  , the most conservative FCC exposure standard of 200 uW/cm² was used in comparing actual selected FM/television measurements.

 

The below graph is logarithmically scaled.  Each major gridline on the vertical axis [Maximum Average Power Density (uW/cm²)] decreases by a power of ten (10) from the top of the graph.  Each bar represents the following measurements.

 

• FCC Standard: 200 uW/cm²
• Westgate ES Interior Selected FM/TV Maximum Measured Value: 0.01157 uW/cm²
• Westgate ES Interior Selected FM/TV Median Measured Value: 0.004062 uW/cm²
• Westgate ES Interior Selected FM/TV Minimum Measured Value: 0.002597 uW/cm²
• Westgate ES Interior Selected FM/TV Geometric Mean Measured Value: 0.004429319 uW/cm²

 

The Westgate Elementary School inside the building selected FM/TV geometric average represents a measured value 45,154 times below the FCC standard.

 

 

A Comparative View of Westgate Elementary School Outside the Building selected FM/TV Frequencies Field Survey vs. the Westgate Elementary School Inside the Building FM/TV Frequencies Field Survey

 

The Westgate Elementary School outside the building selected FM/TV geometric average represents a measured value 3,489 times below the FCC standard.

The Westgate Elementary School inside the building selected FM/TV geometric average represents a measured value 45,154 times below the FCC standard.

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Last update: October 24, 2006
Curator: Liz Gaadt
Elizabeth.Gaadt@fcps.edu