SITE RADIATION SURVEY

Transcription

1 SITE RADIATION SURVEY Site X, zzz Town XX XXXXXXX, XXXXXXX Site ID No: Dated:

2 CONTENTS 1.0 SCOPE EQUIPMENT TRANSMITTERS FM Antenna Details GENERAL A SUPPLEMENTARY WORK PRACTICES REFERENCES SURVEY DETAILS SITE/RADIATION DRAWINGS CAUTION SHEET

3 1.1 SITE Site Name, Owner Name Structure Height: 50m Latitude: Longitude: Type of site: FM Broadcast Microwave Link Data Link 2 Way Comms 400MHz 2 Way Comms 900MHz 1.0 SCOPE This radiation survey is limited to the structure of the mast and areas that are reasonably accessible. No attempt was made to measure the radiation IN-FRONT of radiating antennas. It is assumed that normal precautions for work on high power sites will be followed and NO work will be carried out in front of any antenna unless it has been confirmed that no significant power is being radiated from the antenna. 3

4 2.0 EQUIPMENT The radiation survey was conducted using a RAHAM model 40 meter, a RAHAM 94 E field probe S/N and a RAHAM H105 H field probe S/N H Field Probe Covers the Frequency Range 100 khz 1 GHz. The correction factors for the probe are within 2% for the frequencies involved in this survey. The E field probe covers the frequency range 200 khz 3GHz. The correction factors are less than 2% and no correction has been applied, as this is much smaller than the probes accuracy. All Equipment Calibrated by ARPANSA, 28 th August 2007 NOTE: in some cases this procedure will overestimate the measured field. 4

5 3.0 TRANSMITTERS FM Broadcast Equipment Other Services Rack 1 Comms Room RACK 2 5

6 Rack 3 Rack 4 1. Rack 6 Rack 8 6

7 Other The transmitters were confirmed as actively transmitting before and after the radiation survey. Serial Numbers are listed when clearly visible on equipment. At no time were live transmitter cabinets opened during the survey. 4.0 FM Antenna Details FM Array Model: 16U3311 RFS 904CP Panels 16 Panel Array Gain: 14dBi Feeder: 3/12 x 2 Height: 40m-50m For Other antenna Types and Locations See Tower Drawings. 7

8 5.0 MEASUREMENTS The attached drawings have the results of the radiation survey measurements on them. Sufficient readings were taken to establish the fields during the conditions when the tests were conducted. These are shown in two columns one an average or typical value and the maximum value recorded in the general area. Two tables are given, first on ladders and platforms. The second table for inside the tower/mast/mounting steelwork structure or inside the line of the legs. In some areas the readings are calculated from knowledge of the field and the measurements on similar parts of the antennas. These inferred values are enclosed in (parentheses). Anywhere where the peak reading of either the E or H field is between 1.0 mw/sq cm and 4.99 mw / sq cm, an easily identifiable area, hatched with and coloured yellow. NOTE: These areas may contain positions with areas below 2.0mW/sq cm but are intended to contain all areas which should be avoided. The maximum time allowed by ARPANSA standard in these areas is also shown on the drawings. Following exposure to these elevated levels the standard calls for a recovery period of not less than 40 minutes. This shall be spent in an area in which the field strength is substantially less than the maximum occupational levels. The standard suggests 0.5mW/sq cm would satisfy this requirement. Anywhere where the peak reading of either the E or H field is above 5.0 mw/sq cm an easily identifiable area is defined, hatched and coloured red. NOTE these areas may contain positions with levels below 1.0mw/sq cm but are intended to contain all areas, which must be avoided. In some cases no readings were taken. A large part of the structure clearly presents no possibility of radiation hazards. Other areas the levels can be determined by the radiation from different configurations of antennas and can be deduced from other attached drawings. These areas are not marked. Other areas clearly present a Radiation Hazard and readings were not taken to minimise the risks to the survey team. Typically these areas are adjacent to >5mW areas. These areas are hatched and coloured but no readings are given. 8

9 6.0 GENERAL As well as the tower the transmitter room was also surveyed. Within the transmitter area with the transmitter running at full power into the antenna all areas were less than the minimum discernible reading on the meter. ALL LEVELS WERE BELOW <0.001 mw/cm2 6.1 A SUPPLEMENTARY Evaluation of RF site utilising the ACMA s supplements 1, 2, 3, 4, 5 and 6. This evaluation utilises the charts and calculations of signal strengths from the data given by the ACMA. These figures over estimate the signal strength and if you require a more accurate survey a full-metered survey will be required. Not required as full survey conducted. 9

10 7.0 WORK PRACTICES 1) No work is to be carried out in front of radiating antennas. 2) General Public should not Enter Site under any Circumstances. 3) All GridPaks and Microwave Dishes should be assumed to be actively transmitting NO work should be carried out in front unless connected equipment has been confirmed to be DISSCONECTED. 4) All Areas 3-6m below FM Antennas are Time Limited 5) Areas 0-3m below and directly behind FM Antennas are NO GO zones 6) Before work is performed on site the EMR Folder should be read and signed. 10

11 8.0 REFERENCES WHO, 1993, Electromagnetic Fields (300Hz to 300GHz) Environmental health Criteria 137. World Health Organisation, Geneva. Standards Association of Australia, Principle exposure levelsradiofrequency radiation-300 khz to 300 GHz, Publication AS (int), Standards Association of Australia, North Sydney. Standards Association of Australia, Principles and methods of measurement-radiofrequency radiation- 300kHz to 100 GHz, publication AS , Standards Association of Australia, North Sydney. ARPANSA Radiation Protection Standard Maximum Exposure Levels to Radiofrequency Fields- 3 khz to 300 GHz (2002) 9.0 SURVEY DETAILS Survey Performed On XX_/_XX_/XXXX Report Compiled By Sample Signed XXXXXXXXX Field Service Technician Date: 25/11/2007 Report Endorsed By Sample Signed XXXXXXXXX Technical Services Manager Date: 29/11/

12 10.0 SITE/RADIATION DRAWINGS Site layout and radiation drawing. Note: If more than the structure assessed the site radiation drawings will include rooftop and building layouts. 12

13 Intentionally left Blank 13

14 SRF LOG BOOK TO BE SIGNED BY ANY PERSONS ENTERING RF HAZARD AREAS. Sheet Number:.. Transmitter Site:. I certify that I have read this Site Radiation Folder and understand the RF Hazard Areas and Safety procedures at this site. Date Name Company and /or Section Telephone No. Reason for visit signature 14

15 SRF LOG BOOK TO BE SIGNED BY ANY PERSONS ENTERING RF HAZARD AREAS. Sheet Number:.. Transmitter Site:. I certify that I have read this Site Radiation Folder and understand the RF Hazard Areas and Safety procedures at this site. Date Name Company and /or Section Telephone No. Reason for visit signature 15

16 SRF LOG BOOK TO BE SIGNED BY ANY PERSONS ENTERING RF HAZARD AREAS. Sheet Number:.. Transmitter Site:. I certify that I have read this Site Radiation Folder and understand the RF Hazard Areas and Safety procedures at this site. Date Name Company and /or Section Telephone No. Reason for visit signature 16

17 CAUTION SHEET CAUTION! This Site Radiation Folder may not accurately describe the extent of Hazardous RF Radiation at this site for the reasons indicated below. A person accredited to perform RF measurements must record the RF radiation hazard of the proposed work area or an approved calibrated personal RF monitor must be used at all times in conjunction with the RF Safe Working Procedures. (Tick) THIS SITE WAS MEASURED ON / /. And a new SRF is being prepared. And/or (Tick) Errors have been detected. An Amendment return form has been submitted and noted in the site amendment registrar. And/or (Tick) Short term rearrangements are in place as follows: They have noted in the site amendment index registrar, which is to be signed off when restored to the original state. This sheet must then be removed and discarded. And/or (Tick) Other: Please give details:.... Inserted by (Name)..Date:././.. Signature:.Contact Tel:. 17