Watchman service

Watchman service has long been popular with the industry. Some are capable of excellent service and others were only a token supervision. A guard service could consist of college students who foimd an opportunity to work and study at the same time. Many others had retirees hired without concern for their health and physical condition. With some guard services, guards change often, and time was not taken to train the replacement. Asa result, a less than satisfactory service was being provided. 

Some commonly used technology is already being used in semiconductor fabrication facilities. A common approach is the card entry system. When the guard enters an area secured by a card entry system, the card will send a coded message to the proprietary station much the same way as the central station key system. Another innovative system is motion activated TV s in normally unoccupied areas. Motion activated TV s are much more suitable for human response than the close circuit TV that is constantly mnning. An operator can quickly become complacent to a large number of 

The semiconductor fabrication facility appears to be very safe with its clean white walls and yellow lights. In reality, the hazards and the reactions of the materials involved makes it take on a likeness to a miniature High Hazard Chemieal feeility. Chemicals in all phases are used. Some materials are used in more than one phase. Many of the chemicals are combustible, flammable, pyrophoric, toxic, inert, oxidizers, acids, etc. In the semiconductor facility it is critical that only the desired reactions will occur. It is not only important that they properly react in the manufacturing process, it is just as important they are not permitted to react in storage and disposal. 

Flammable gas should be stored in a room cut off from the fabrication building by a pressure resistant wall having a four hour fire resistant rating. The wall should be blank and can be tied into the steel of the main stracture but not the gas room itself The wall should be capable of withstanding at least 100 psf. 

Electrics in the room should conform to the National Electric Code (NFPA 70). 

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Surveillance. Lastly, an HPR facility requires surveillance. It may consist of a continuous occupancy, watchman service and/or electronic surveillance. 

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