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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