Controlled area

Personnel change rooms and non-sterile manufacturing or preparation areas are common examples of controlled areas. Particulate matter in the air should be no greater than 100,000 particles greater than or equal to 0.5 pm per-cubic foot. Air locks must be provided to entrances and exits, surfaces must be easily cleanable, and air supply should be filtered and conditioned. The number of air changes should be at least 20 per hour. For explosion-proof areas where solvents are used, the air supply operates on a once-through basis. 

Dress requirements in controlled areas should include hair covering, beard covering, and a long-sleeved protective overgarment. Garments should be free from the shedding of particles and fibers. 

---

Practical applications [2] of a GammaMat M model using the new Selenium crawler camera loaded with approx. 1 TBq (30Ci) on a pipeline of diameter 12 and wall thickness of 0.25 showed 6-7 m axial distance to the exposed source as limit of the radiation controlled area (40pSv/h) and 22m perpendicular to the pipeline. Other authors [3] have reported about a comparison for Ir-192 and Selenium source on a 4.5 diameter pipe and 0,125 steel thickness they have found for 0.7 Tbq (18Ci) Selenium a value of 1 Om behind the film (in the unshielded beam) comparing under same conditions to approx. 40m for Iridium. 

The ultrasonic controls section, shown in Figure 7, provides the means for the user to set the operating parameters for the inspection. The majority of the controls are direct equivalents of those found on a conventional ultrasonic flaw detecfor some additional controls are provided to give access to the special features of the CamuS system. The Controls area is sub-divided into three parts. 

As mentioned, nonattainment areas will have to implement different control measures, depending on their classification. Marginal areas, for example, are the closest to meeting the standard. They will be required to conduct an inventory of their ozone-causing emissions and institute a permit program. Nonattainment areas with more serious air quality problems must implement various control measures. The worse the air quality, the more controls areas will have to implement. 

Conduct work in designated controlled areas (e.g. in UK these are areas in which instantaneous dose rates >7.5 pSv/hour occur, or where employees may exceed 6 mSv annual dose limit, or where air concentration or surface contamination exceeds specified levels). 

Do not eat, drink, smoke, apply cosmetics or use mouth pipettes in controlled areas. Dress any wounds prior to entering the area. 

SI 1991/1282 Smoke Control Areas (Authorized Euels) Regulations... 

In some cases, decontamination workers wear the same level of PPE as workers entering the controlled area or exclusion zone. In others, decontamination workers are sufficiently protected by wearing a lower level of PPE. In many instances, level D protection is not acceptable in the CRZ. In addition, all decontamination workers should be decontaminated before entering the support zone. Appropriate equipment and clothing for protecting decontamination workers should be planned by the project team [2]. 

Advantages include the whttle flow pattern can be controlled, areas upstream of sources can be kept clean, and high contaminant removal and tern... 

MACC was established in 1967 and encompasses nearly 50,000 square miles from Virginia to New York. MAAC contains the PJM centrally dispatched electric control area, which is the largest such area in North America and the third largest in the world. PJM Interconnection became the first operational independent system operator in the United States on Januai y 1, 1998. 

At very low frequencies the movement of the panel will be controlled by the stiffness, as inertia is a dynamic force and cannot come into effect until the panel has measurable velocity. Stiffness controls the performance of the panel at low frequencies until resonance occurs. As the driving frequency increases, the resonance zone is passed and we enter the mass-controlled area. The increase in the sound-reduction index with frequency is approximately linear at this point, and can be represented by Figure 42.8. 

Traditional Coordinated and Congruent Phosphate Program control areas ... 

Analysis and Interpretation of the Information and data resulting from the exploratory study will provide the basis for designing the final definitive monitoring study Including all elements of the QA/QC plan. For example, decisions must be made on whether or not the selected control area Is adequate and appropriate whether the hypothesized model Is valid whether the study area should be stratified and If so, how what number of samples should be collected at what locations and whether or not the QA/QC plan for sampling is adequate and if not, how it should be changed. 

Untreated (control) soil is collected to determine the presence of substances that may interfere with the measurement of target analytes. Control soil is also necessary for analytical recovery determinations made using laboratory-fortified samples. Thus, basic field study design divides the test area into one or more treated plots and an untreated control plot. Unlike the treated plots, the untreated control is typically not replicated but must be sufficiently large to provide soil for characterization, analytical method validation, and quality control. To prevent spray drift on to the control area and other potential forms of contamination, the control area is positioned > 15 m away and upwind of the treated plot, relative to prevailing wind patterns. 

The foliar and soil treated plots and control area will be identified with markers so that the treated plots and control area do not have the same flag or marker colors. 

Once the first spray has been applied, overhead sprinklers must not be used in the treated plot and control area under any circumstances. Irrigate only under plants for non-DSR studies. 

All maintenance pesticide applications must be approved in advance and documented. Pesticides that do not interfere with analysis may be applied in order to control weeds, pathogens, and other pests if they appear in the treated plot and control area only if absolutely necessary. The treated plot and control area should be maintained with the same compound and rate and at the same time. 

The treated plots and control area should be managed according to agricultural practice in the area. Fertilization should be made according to normal agricultural practice and documented as to when and how applied include rate and composition. Soil preparation and other cultural practices must be noted. 

Six control sample jars of 0.01% Aerosol OT detergent in distilled water solution (200 mL each) were prepared at each site on sampling days 1,14 and 28 by dislodging leaf disks taken from the untreated control area. Triplicate samples were fortified at each of two concentrations. Fortification levels were 50 and 400 qg of oxamyl per sample. 

Idaho National Engineering Laboratory - Subsurface Disposal Area (SDA) and control area, 1978-1979... 

---