Monitoring existing networks

Although spectroradiometers appear to have many advantages, their use in comparison to simpler broadband detectors in dense monitoring UV networks is not necessarily the best choice. First, because in general are unable to produce continuous measurements, since even the faster instruments would need a few minutes to complete a typical UV scan, while broadband detectors can be sampled easily once every a few seconds. The second reason is their purchase and operational cost, which can be 5-10 times higher than for a typical broadband detector. Finally, due to their extreme sensitivity their operation and maintenance requires special experimental support and experienced, well-trained personnel. Despite these disadvantages, their superior quality imposes the existence of at least on spectroradiometer to support each network and provide proper absolute calibration of the broadband detectors. 

Stationary monitoring networks are also operated to determine the impact of new sources of emissions. As part of the environmental impact statement and Prevention of Significant Deterioration processes, the projected impact of a new source on existing air quality must be assessed. Air quality monitoring is one means of making this type of assessment. A monitoring network... 

Identification of organic components of ambient aerosols and estimation of the contributions of various pathways are of immediate interest for control strat es and could by achieved by using the existing monitoring networks so as to provide more information on aerosol chemical composition. In view of the adverse effects (e.g., on health and visibility) associated with submicrometer aerosols, an air quality standard for submicrometer particles might be more adequate than the present standard for total suspended particles. 

After consideration of all the technical and economic aspects of expanding the existing system versus installing a completely new system, the Honeywell system was replaced by a TRK system of ouch greater speed and capacity (see Figure S). Also added waa a SCADA console at each GC control roam to allow the CC operators to monitor well pad operationa and if necessary to take control action. Another addition was a revised microwave communications network thet includes the well peds. The system has an inner dual redundant loop for the most critical communications path between GCs, HOC, and CPS, with redundant radial shots from each GC to its associated well pads. 

Fig. 18.2 Water inventory map that includes the water monitoring stations and all the existing wells. The latter may be checked whenever alarming pollution has been observed at any of the regular monitoring stations. Lines A-A1 and C-C1 are suggested directions of geological-hydrological cross-sections to be prepared for the monitoring network reference book.

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