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Stewie
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1. Fluid transfer is best accomplished using

Explanation

A Pasteur pipet is the best tool for fluid transfer because it is specifically designed for accurate and precise measurements of small volumes of liquid. It has a narrow, tapered tip that allows for easy suction and release of fluids. Additionally, the glass construction of a Pasteur pipet makes it resistant to chemical reactions and contamination, ensuring the integrity of the transferred fluid.

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CDC 4b051 Vol3 - Quiz

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2. This occupational exposure limit (OEL) is a concentration of contaminants which can never be exceeded during any part of the working exposure

Explanation

The term "ceiling" in the context of occupational exposure limit refers to a concentration of contaminants that should never be exceeded at any time during the working exposure. This means that the level of contaminants in the air or environment should not go beyond the specified ceiling limit, ensuring the safety and health of workers. The ceiling limit is set to prevent any adverse effects that may occur due to prolonged exposure to high levels of contaminants.

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3. If any of your sampling equipment was contaminated it could cause

Explanation

If any of the sampling equipment used in the process is contaminated, it can lead to invalid sampling results. This is because the contamination can introduce foreign substances or impurities into the sample, thereby affecting its composition and accuracy. Contamination can occur through various means such as improper handling, storage, or cleaning of the equipment. Therefore, it is crucial to ensure that the sampling equipment is clean and free from any contaminants to obtain reliable and valid sampling results.

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4. Why do you need to use caution when using reagents to decontaminate sample equipment?

Explanation

Using caution when using reagents to decontaminate sample equipment is necessary because reagents can leave residue on the sampling equipment. This residue can contaminate future samples, leading to inaccurate results. To ensure the integrity of the samples, it is important to properly clean and remove any residue left by the reagents.

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5. When is the only time you collect bacteriological samples of a hot tub/spa?

Explanation

Bacteriological samples of a hot tub/spa are collected if an illness occurs as a result of someone using it. This is because the presence of illness indicates a potential contamination or bacterial growth in the hot tub/spa, which needs to be investigated and addressed. Collecting bacteriological samples in such cases helps in identifying the specific bacteria causing the illness and taking appropriate measures to prevent further infections.

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6. What type of sampling is being conducted if a technician is using a HAPSITE to sample at a specific time?

Explanation

I didn't need no stinking book to look this one up

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7. What type of sampler is best suited to collecting a water sample at various levels of a large tank containing an unknown liquid?

Explanation

not-available-via-ai

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8. When would it be advantageous to use field analytical screening methods that are direct reading?

Explanation

Field analytical screening methods that are direct reading are advantageous when an immediate answer is necessary or time is a constraint. This is because these methods provide real-time results, allowing for quick decision-making and immediate action. They eliminate the need for sending samples to a laboratory and waiting for the results, saving valuable time. In situations where time is limited, such as emergency response or on-site assessments, direct reading methods can provide rapid and reliable information, ensuring prompt and effective decision-making.

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9. The purpose of calibrating water sampling and analysis equipment is to

Explanation

The purpose of calibrating water sampling and analysis equipment is to ensure accurate results from drinking water sampling. Calibration involves adjusting and standardizing the equipment to ensure that it is measuring accurately and providing reliable data. This is crucial in order to obtain precise and trustworthy results when analyzing the quality of drinking water. Calibrating the equipment helps to eliminate any potential errors or inaccuracies in the sampling process, ensuring that the results obtained are reliable and can be used for making informed decisions regarding water quality and safety.

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10. A 15-minute time weighted average (TWA) short-term exposure limit is known as a

Explanation

this question reminded me of Short Round from Indiana Jones, hmmm I cant say I have seen to many Chinese in the AF

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11. How do you prepare a blank?

Explanation

To prepare a blank, it is important to open and immediately seal the media in the work area. This ensures that the media remains uncontaminated and prevents any outside particles from entering the sample. By sealing the media right away, the chances of contamination are minimized, allowing for accurate and reliable results during sampling. Keeping an unopened tube with the samples, sampling another worker away from the process, or leaving an opened tube in an area throughout sampling can all introduce potential sources of contamination, making them incorrect choices.

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12. When performing post sampling calibration, use the lowest flow rate for calculating the volume collected because

Explanation

Using the lowest flow rate for calculating the volume collected during post-sampling calibration is the most conservative approach. This means that it ensures the collected volume is not overestimated, providing a more accurate representation of the actual volume collected. By being conservative, any potential errors or uncertainties in the measurement are minimized, leading to more reliable results.

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13. Composite sampling is primarily used when sampling

Explanation

Ever get turned off from this job when 80% of your day is spent staring at a computer screen entering data in DOEHRS or other related work... or making this damn test

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14. When developing an Occupational Exposure strategy, the purpose of evaluating existing controls is to

Explanation

im done just focus on the damn quiz

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15. Which is not an AFI 48–146 guideline for performing exposure screening assessments?

Explanation

if you chose not to document your just asking for a bruising

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16. Which statement best describes chain of custody?

Explanation

Chain of custody refers to the process of documenting and maintaining the chronological history of the handling, transfer, and storage of samples or evidence. It ensures that there is a clear and unbroken record of the custody of the samples from the moment they are collected until they are analyzed. This helps to establish the integrity and reliability of the samples and the subsequent analysis.

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17. Which phrase most accurately describes the American Industrial Hygiene Association (AIHA) Exposure Model?

Explanation

back for more of my shenanigans

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18. If you ship your bacteriological water samples to an approved laboratory, what is the maximum time between collection and examination?

Explanation

Bacteriological water samples are highly sensitive and can easily degrade over time. To ensure accurate results, it is crucial to minimize the time between collection and examination. The maximum time allowed for shipping these samples to an approved laboratory is 24 hours. Beyond this timeframe, the samples may become compromised, leading to inaccurate test results. Therefore, it is important to prioritize prompt transportation and analysis of bacteriological water samples to maintain their integrity.

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19. What type of Occupational and Environmental Exposure Limits (OEEL) is "set and enforced by governmental agencies?"

Explanation

can we speed this up, now!

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20. When should gas and vapor meters be field calibrated?

Explanation

Gas and vapor meters should be field calibrated both before and after use to ensure accurate measurements. Calibration before use ensures that the meter is properly calibrated and ready to provide accurate readings. Calibration after use is important to verify that the meter has not been affected or drifted during the measurement process. By calibrating before and after use, any potential inaccuracies can be identified and corrected, ensuring reliable and precise measurements.

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21. The equipment that functions as a fully equipped portable laboratory and is able to run about 100 tests is the

Explanation

The DREL 2800 is the correct answer because it is described as a fully equipped portable laboratory that can run about 100 tests. This suggests that it has all the necessary equipment and capabilities to perform various tests, making it a comprehensive and efficient option. The other options, such as the DREL 2010, M272 water testing kit, and Bacteriological water test kit, do not provide the same level of functionality and capacity as the DREL 2800.

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22. When should you take pH and chlorine measurements of the base swimming pool?

Explanation

Taking pH and chlorine measurements during the busiest time of the day is important because this is when the pool is likely to have the highest number of swimmers and therefore the highest level of contaminants. By measuring pH and chlorine levels during this time, the facility manager can ensure that the pool is properly balanced and sanitized to maintain the safety and comfort of the swimmers. This is crucial for preventing the spread of waterborne illnesses and maintaining the overall cleanliness of the pool.

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23. Which statement describes grab sampling?

Explanation

Grab sampling refers to the collection of an instantaneous sample to provide a quick estimate. This means that a single sample is taken at a specific moment in time, rather than over a period of time. It is a method commonly used when immediate results or quick estimates are needed, and it allows for a rapid assessment of the quality or composition of a substance. The other statements do not accurately describe grab sampling.

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24. What is the difference between the DOD and AF Assessment Models?

Explanation

Oh, its you again

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25. After the results from mass/volume concentration air sampling are received you find the results are reported in grams. Before you can use the formula to determine mass/volume concentration, you will have to convert the results reported in gram into what measure?

Explanation

The correct answer is mg, which stands for milligrams. Since the results are reported in grams, they need to be converted to milligrams before using the formula to determine mass/volume concentration. This conversion is necessary because milligrams are a smaller unit of measurement compared to grams, and it allows for more precise calculations when determining concentration.

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26. What sample media do you use for the Spread Plate Method?

Explanation

The correct answer is R2A Agar. The Spread Plate Method is a technique used in microbiology to isolate and enumerate bacteria in a sample. R2A Agar is a specific type of agar medium that is commonly used for this method. It contains a combination of nutrients that support the growth of a wide range of bacteria, including those that are typically found in environmental samples. This makes it suitable for the isolation and enumeration of bacteria from various sources, such as soil, water, and wastewater. EC medium, M-Endo broth, and M-FC medium are other types of media used for different purposes in microbiology, but they are not specifically designed for the Spread Plate Method.

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27. When calibrating a Photo Ionization Detector/Flame Ionization Detector (PID/FID), how many Tedlar sample bags need to be filled?

Explanation

When calibrating a Photo Ionization Detector/Flame Ionization Detector (PID/FID), three Tedlar sample bags need to be filled. This is because the calibration process requires the use of three different calibration gases to ensure accurate and reliable measurements. Each calibration gas is filled into a separate Tedlar sample bag, allowing the PID/FID to be calibrated at different concentration levels. This helps to establish a calibration curve and ensure the instrument's accuracy across a range of concentrations.

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28. What key indicators are measured by indoor air quality monitors?

Explanation

Indoor air quality monitors measure key indicators such as temperature, relative humidity, and carbon dioxide levels. These indicators are important in assessing the quality of the air indoors. Temperature can affect comfort levels and the growth of microorganisms, while relative humidity can impact the growth of mold and bacteria. Carbon dioxide levels are used to evaluate ventilation and the presence of pollutants from human activities. Monitoring these indicators helps identify potential air quality issues and allows for necessary actions to improve indoor air quality.

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29. According to American Industrial Hygiene Association (AIHA), the goal of random sampling is to

Explanation

this seems pretty easy so far, don't fuk it up

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30. Why is a single "blank" run sufficient as an operational check for the HAPSITE?

Explanation

The HAPSITE contains internal gas standards, which means that it is already calibrated and ready to be used. These internal gas standards ensure that the instrument is functioning properly and can accurately detect and analyze gases. Therefore, a single "blank" run is sufficient as an operational check for the HAPSITE because the internal gas standards within the instrument provide the necessary calibration.

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31. What are the most commonly used devices for particulate sampling?

Explanation

Filters are the most commonly used devices for particulate sampling because they are effective in capturing and retaining particles from the air. They can be made of various materials such as paper, glass fiber, or quartz, and are designed to trap particles of different sizes. Filters are easy to use, cost-effective, and can be analyzed in a laboratory to determine the concentration and composition of particulate matter. They are widely used in industries, research institutions, and environmental monitoring to assess air quality and evaluate the potential health risks associated with airborne particles.

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32. Which device allows the collection of respirable sized particles?

Explanation

A cyclone is a device that allows the collection of respirable sized particles. It works by using centrifugal force to separate the particles from the air stream. As the air enters the cyclone, it is forced to move in a circular motion, causing the heavier particles to be thrown outwards and collected in a separate container. This allows for the collection and analysis of particles that are of a size that can be inhaled and potentially cause respiratory issues.

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33. Which of these is not a consideration when comparing analysis results to a standard?

Explanation

When comparing analysis results to a standard, it is important to ensure that all individuals potentially affected are listed in supportive documentation. This means that the documentation should include information about all the individuals who may be impacted by the analysis results. This consideration is important because it ensures that the analysis is comprehensive and takes into account all relevant individuals. The other considerations listed in the question (correct laboratory analysis method, correct type of standard, correct units of measurement) are also important, but they are not the answer to the question as they are all considerations when comparing analysis results to a standard.

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34. When you are sampling for solids, what is the maximum regulatory time the samples can be stored prior to analysis?

Explanation

The maximum regulatory time for storing samples prior to analysis when sampling for solids is 2-7 days. This time frame allows for sufficient time to transport the samples to the laboratory and conduct the necessary analysis while minimizing the risk of sample degradation or contamination. Storing the samples for longer periods may lead to inaccurate results and compromise the integrity of the analysis.

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35. Which is a portable gas chromatograph designed for response situations where "on-scene" detection, identification and quantification of chemical warfare agents and toxic industrial is

Explanation

The correct answer is Hazardous Air Pollutants on Site (HAPSITE). HAPSITE is a portable gas chromatograph that is specifically designed for response situations where "on-scene" detection, identification, and quantification of chemical warfare agents and toxic industrial chemicals is required. It is used to analyze air samples for hazardous air pollutants and provides quick and accurate results in the field. HAPSITE is a reliable tool for first responders and emergency personnel to assess the presence of dangerous substances in real-time.

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36. Drinking water with a high pH level (above 8.5) indicates to you the water

Explanation

Water with a high pH level (above 8.5) can cause aesthetic problems. Aesthetic problems refer to issues that affect the appearance or taste of the water. High pH levels can result in a bitter or metallic taste, as well as discoloration or staining of fixtures and laundry. While it may not pose a health risk or be corrosive, it can still be undesirable due to the impact on the water's taste and appearance.

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37. When collecting potable water samples for bacteriological analysis, you should adhere to all of the following guidelines except which one?

Explanation

When collecting potable water samples for bacteriological analysis, it is important to adhere to all of the following guidelines except for always flushing out the bottle before taking the sample. Flushing out the bottle before taking the sample can introduce contaminants into the water, thereby affecting the accuracy of the analysis. It is essential to maintain good personal hygiene, never hold the bottle by the neck, and never lay the bottle down on the ground to ensure the integrity of the sample.

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38. In addition to being a required mandate, sampling is performed to

Explanation

come on now

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39. Remediation sampling is conducted to determine

Explanation

Remediation sampling is conducted to determine if any contamination exists after a cleanup process. This is important because it helps to ensure that the cleanup process was effective in removing the contamination. By conducting remediation sampling, it is possible to identify any remaining contamination and take further action if necessary. This can include additional cleanup measures or implementing preventive measures to prevent further contamination. Overall, remediation sampling is a crucial step in the cleanup process to ensure that the area is safe and free from contamination.

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40. Blank samples are prepared and shipped along with air samples to

Explanation

The correct answer is to determine if any contamination occurred from the time the media was opened until the time it reached the laboratory. This is because the blank samples are prepared and shipped along with air samples to specifically check for any contamination that may have occurred during the transportation process. By comparing the results of the blank samples with the air samples, any potential contamination can be identified and accounted for in the analysis.

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41. Why are proper protocol and preservation guidelines important elements of a quality assurance/ quality control (QA/QC) program?

Explanation

Proper protocol and preservation guidelines are important elements of a QA/QC program because they ensure that water data is accurate and useful. By following these guidelines, the data collected will be reliable and can be used for various purposes such as scientific research, regulatory compliance, and decision-making. The guidelines help in standardizing the procedures for sample collection, handling, and analysis, which minimizes errors and ensures consistency. This ultimately leads to reliable and trustworthy water data that can be used with confidence.

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42. When determining the collection volume for an air sample, you would opt to collect less volume of air when

Explanation

When concentrations are expected to be high, it is advisable to collect less volume of air. This is because high concentrations can lead to saturation of the collection media, resulting in the loss of sample integrity and accuracy. By collecting less volume of air, the collection media can effectively capture and retain the high concentrations, ensuring reliable and representative results.

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43. In the liquid sampling quality assurance/ quality control (QA/QC) process, what is the difference between trip blanks and equipment blanks?

Explanation

Trip blanks are provided by the laboratory, whereas equipment blanks are not necessarily provided by the laboratory. Trip blanks are used to measure any contamination that may occur during the transportation of samples from the field to the laboratory. On the other hand, equipment blanks are used to measure any contamination that may occur from the equipment used in the sampling process.

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44. What are the two types of augers?

Explanation

The two types of augers mentioned in the answer are bucket and screw. Augers are tools used for drilling holes in the ground or other materials. A bucket auger is designed with a hollow cylinder and a cutting edge at the bottom, allowing it to collect soil or other materials as it is rotated. A screw auger, on the other hand, has a spiral-shaped blade that helps in pushing the soil or material out of the hole as it is drilled. These two types of augers are commonly used in various industries for different purposes.

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45. What item must be field checked but cannot be calibrated?

Explanation

Hand-held sampling pumps must be field checked to ensure they are functioning properly and providing accurate samples. However, they cannot be calibrated because they do not have adjustable settings or mechanisms that can be calibrated. Calibration is the process of adjusting and setting the parameters of a device to ensure its accuracy. Since hand-held sampling pumps do not have this capability, they cannot be calibrated.

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46. What test do you use to obtain qualitative information on whether or not your water sample contains coliforms?

Explanation

The presence/absence method is used to obtain qualitative information on whether or not a water sample contains coliforms. This method involves testing the sample for the presence or absence of coliform bacteria, which are indicators of potential fecal contamination. If coliforms are present in the sample, it indicates that the water may be contaminated and further testing is required. If coliforms are absent, it suggests that the water is free from fecal contamination. This method is commonly used in water quality testing to ensure the safety of drinking water.

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47. What is a primary benefit of field analysis?

Explanation

Field analysis is beneficial because it indicates where possible contamination exists. This means that by conducting a field analysis, one can identify areas or sources that may be contaminated, allowing for targeted interventions and preventive measures to be implemented. This can help in minimizing the spread of contaminants and ensuring the safety and quality of the environment or samples being analyzed.

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48. If you sample for 7 hours of a 10 hour shift and can document that the worker is never exposed during the remaining three hours, you should calculate the time weighted average using which value?

Explanation

The time weighted average should be calculated using the value of 10 hours because the worker is still considered to be potentially exposed during the remaining three hours of the shift, even though no exposure was documented. The calculation takes into account the entire duration of the shift to accurately assess the average exposure over time.

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49. The purpose of establishing an Immediately Dangerous to Life or Health (IDLH) exposure concentration is to

Explanation

hows this career field going for you, by the looks of this test you may not survive

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50. If you need to determine the residual chlorine content in a drinking water sampling, which piece of equipment would you use?

Explanation

A color comparator is used to determine the residual chlorine content in a drinking water sampling. This piece of equipment allows for the comparison of the color of the water sample with a set of standard color discs or tubes, which represent different chlorine concentrations. By matching the color of the sample with the closest standard disc or tube, the residual chlorine content can be determined. This method is commonly used in water treatment plants and laboratories to ensure that the drinking water is safe for consumption.

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51. What action should be taken before collecting any surface or subsurface soil samples?

Explanation

Before collecting any surface or subsurface soil samples, it is important to clear the sampling area of any debris. This is necessary to ensure that the samples collected are representative of the soil in that specific area and not contaminated by any foreign materials. Debris such as leaves, rocks, or other organic matter can alter the composition of the soil and affect the accuracy of the analysis. Therefore, removing any debris from the sampling area is a crucial step in obtaining accurate and reliable soil samples.

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52. What action should you take if the bacteriological quality of the swimming pool water does not meet standards?

Explanation

If the bacteriological quality of the swimming pool water does not meet standards, the appropriate action to take is to collect repeat samples from the sections where the original samples were taken. This is important to verify the initial results and ensure accuracy. By collecting repeat samples, it allows for a thorough assessment of the bacteriological quality of the water and provides a basis for determining the necessary steps to address the issue. It also helps in identifying any potential areas of concern or contamination within the pool.

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53. Water sample result interpretation is conducted by

Explanation

The correct answer is comparing results to a selected standard. When interpreting water sample results, it is important to compare them to a specific standard or guideline. This helps determine if the water quality meets the required criteria for safe consumption or specific purposes. By comparing the results to a selected standard, any deviations or abnormalities can be identified, and appropriate actions can be taken to address any potential issues.

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54. The development of your flight's Environmental Sampling Analysis and Monitoring Plan is based on

Explanation

The development of the flight's Environmental Sampling Analysis and Monitoring Plan is based on the regulatory requirements for the drinking water system. This means that the plan is created in accordance with the rules and regulations set by the governing bodies responsible for ensuring the safety and quality of drinking water. These regulations outline the specific parameters, sampling frequency, and analysis methods that must be followed to ensure compliance and maintain the safety of the drinking water system.

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55. If the color of the water in the test tube does not exactly match any of the color comparator standards, you

Explanation

When the color of the water in the test tube does not exactly match any of the color comparator standards, it means that it falls between two standard colors. In this case, the best course of action is to record the residual as the reading between the two standards. This allows for a more accurate representation of the color of the water, as it acknowledges that it is not a perfect match to either of the standards.

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56. After sampling results have been obtained, how are they interpreted?

Explanation

After sampling results have been obtained, they are compared to the selected Occupational and Environmental Exposure Limit (OEEL). This comparison helps to determine whether the levels of occupational and environmental exposure are within the acceptable limits set by regulatory bodies. By comparing the results to the OEEL, it is possible to assess the potential risks and take appropriate measures to ensure the health and safety of individuals.

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57. When collecting drinking water samples, in what order should you collect them?

Explanation

When collecting drinking water samples, it is important to prioritize the collection of metals, followed by chemicals, and then microbiological samples. This order ensures that any potential contamination from metals, such as lead or copper, is detected first. Chemicals, such as pesticides or industrial pollutants, can also pose health risks and should be tested for next. Finally, microbiological samples, which test for bacteria or other microorganisms, should be collected last as they are more likely to be affected by external factors such as temperature or exposure to air.

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58. The reason you need make sure historical data and recent data are obtained and analyzed in the same manner for trend analysis is to

Explanation

To assure accurate, comparative results, it is important to obtain and analyze historical and recent data in the same manner for trend analysis. This ensures that any conclusions drawn from the analysis are reliable and valid. If the data is not collected or analyzed consistently, it may lead to inaccurate conclusions and unreliable trends. Therefore, by ensuring that the data is obtained and analyzed in the same manner, accurate and comparative results can be obtained.

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59. What type of water/liquid do you use to calibrate the pH pen?

Explanation

Buffer solution is the correct answer for calibrating a pH pen. Buffer solutions are specifically designed to have a stable and known pH value. They are made by mixing a weak acid and its conjugate base or a weak base and its conjugate acid. By using a buffer solution to calibrate the pH pen, it ensures that the pen is accurately measuring pH levels and providing reliable readings. Distilled water, deionized water, or the calibration fluid that comes with the pH pen may not have a known and stable pH value, making them unsuitable for calibration.

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60. The 95th percentile exposure estimates

Explanation

The 95th percentile exposure estimate refers to a value above which approximately 5 percent of exposures occur. This means that 95 percent of the exposures fall below this value. It is used to understand the upper range of exposures and is often used in risk assessment and setting regulatory limits.

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61. The scheduled work week has changed to 8 hours per day/6 days a week. Which reduction factor formula should be used to determine the equivalent Occupational and Environmental Exposure Limit-time weighted average (OEEL-TWA)?

Explanation

The correct answer is "Weekly" because the question states that the work week has changed to 8 hours per day/6 days a week. Therefore, to determine the equivalent Occupational and Environmental Exposure Limit-time weighted average (OEEL-TWA), the reduction factor formula that should be used is the one that is based on a weekly time frame.

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62. You should seal your liquid sample containers because it

Explanation

Sealing the liquid sample containers helps detect unauthorized tampering of the samples. By sealing the containers, any attempt to open or tamper with them would be evident, as the seal would be broken or tampered with. This ensures the integrity of the samples and helps maintain their reliability and accuracy. It is an important security measure to prevent any unauthorized access or manipulation of the samples.

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63. When considering additive effects of chemicals, the occupational exposure limit (OEL) is exceeded if the compliance factor is which of the following?

Explanation

When considering additive effects of chemicals, the occupational exposure limit (OEL) is exceeded if the compliance factor is greater than one. This means that the combined effect of multiple chemicals is higher than the acceptable limit, indicating a potential risk to the health and safety of individuals exposed to these chemicals in the workplace.

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64. If air sampling showed that a worker is exposed to concentrations of 35 ppm xylene (OEEL, 100 ppm), 20 ppm methyl chloride (OEEL, 50 ppm), and 25 ppm perchloroethylene (OEEL, 50 ppm), if these chemicals have a similar toxicological effect what would be their total atmospheric concentration?

Explanation

The total atmospheric concentration of the three chemicals can be calculated by adding their individual concentrations together. In this case, the worker is exposed to 35 ppm xylene, 20 ppm methyl chloride, and 25 ppm perchloroethylene. Adding these values together gives a total of 80 ppm, which represents the combined concentration of the three chemicals in the air.

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65. What must you calculate from the sampling and analytical error and your air sampling results to determine whether the time weighted average could be above the occupational exposure limit?

Explanation

To determine whether the time-weighted average could be above the occupational exposure limit, you need to calculate the Upper Confidence Limit (UCL) from the sampling and analytical error and your air sampling results. The UCL represents the upper boundary of the confidence interval, indicating the highest possible value for the average concentration of the substance in the air. By comparing the UCL with the occupational exposure limit, you can determine if the average concentration exceeds the limit and poses a potential risk to workers.

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66. Sample holding times, preservatives, and collection tool hygiene are things that a technician should be aware of when conducting which type of sampling?

Explanation

You know I cant say I know too many people at the office who care to stay in this profession, might be worth while to see how different work is in the civy sector, fk cross training, aint nobody got time for that

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67. How can the workers be affected if you calculate a compliance factor for multiple chemicals?

Explanation

When calculating a compliance factor for multiple chemicals, if they attack the same organ in the same way, it means that these chemicals have a similar toxic effect on a specific organ. This can have a significant impact on the workers as it increases the risk of organ damage or dysfunction. The cumulative effect of these chemicals targeting the same organ can be more severe and potentially lead to long-term health issues for the workers.

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68. If a soil sample is mixed or blended to create an even distribution of the contamination that is in the soil, what type of sample has been collected?

Explanation

The correct answer is Homogenized. When a soil sample is mixed or blended to create an even distribution of the contamination present in the soil, it is referred to as a homogenized sample. This process ensures that the sample accurately represents the overall contamination levels in the soil, as it eliminates any potential variations or inconsistencies that may exist in different parts of the soil. By homogenizing the sample, researchers can obtain a representative and reliable analysis of the contamination present in the soil.

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69. When comparing your sample results to a standard, what is the generally accepted practice?

Explanation

The generally accepted practice when comparing sample results to a standard is to use the most current and stringent occupational and environmental exposure limit (OEEL). This ensures that the comparison is based on the most up-to-date and strict guidelines for occupational and environmental safety. Using the most current and stringent OEEL helps to ensure that the sample results are evaluated against the highest level of protection for workers and the environment.

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70. What is the proper way to document your sample results once they have been interpreted, is done according to

Explanation

could find an answer in the book for this, msg me if im wrong

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71. What level of Protective Action Criteria (PAC) indicates life-threatening health effects?

Explanation

你个笨蛋 for those that are Chinese in the AF

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72. What is the major concern when sampling for volatile organic compounds?

Explanation

Minimizing air contact with the soil sample is the major concern when sampling for volatile organic compounds because these compounds can easily evaporate into the air. By minimizing air contact, the risk of losing or altering the volatile organic compounds is reduced, ensuring a more accurate analysis of the sample. Proper preservation and timely analysis are also important, but minimizing air contact specifically addresses the concern related to volatile organic compounds.

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73. When sterilizing a water tap, what is the percentage of chlorine solution you should use and how long should the tap be immersed in the solution?

Explanation

not-available-via-ai

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74. The recommended flow rate of an example chemical is 0.5 to 1.0 liters per minute (lpm). If you wanted to calculate the minimum amount of time you can sample and still meet the limit of detection, what flow rate would you use?

Explanation

To calculate the minimum amount of time to meet the limit of detection, you would want to use the lowest flow rate within the recommended range. Since the recommended flow rate is 0.5 to 1.0 lpm, the lowest flow rate within this range is 0.5 lpm. However, using a flow rate lower than the recommended range may not ensure accurate detection. Therefore, to be on the safe side and ensure accurate detection, it is better to use the higher flow rate within the range, which is 1.0 lpm.

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75. When collecting breathing zone air samples the flow rate changes since you began sampling. As a worst case measure which flow rate observed should be used to determine volume collected?

Explanation

When collecting breathing zone air samples, it is important to determine the volume of air collected accurately. In order to do this, the worst case scenario should be considered. This means that the lowest flow rate observed should be used to determine the volume collected. By using the lowest flow rate, we can ensure that the volume calculation is based on the smallest amount of air collected, which is the most conservative approach.

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76. Which type of sampling strategy should be used when there is minimal site background information available and there are no visible signs of contamination?

Explanation

When there is minimal site background information available and no visible signs of contamination, a simple random sampling strategy should be used. This type of sampling ensures that each potential sampling location has an equal chance of being selected, which helps to reduce bias and increase the representativeness of the sample. By randomly selecting sampling locations, it is possible to obtain a more accurate understanding of the overall contamination levels in the area, even without prior knowledge or visible signs of contamination.

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77. What type of sampling strategy would be used to investigate large sites that encompass a number of soil types, topographical features, or land uses?

Explanation

A stratified random sampling strategy would be used to investigate large sites that encompass a number of soil types, topographical features, or land uses. This sampling strategy involves dividing the site into different strata or subgroups based on the characteristics of interest, such as soil types or land uses. Then, a random sample is taken from each stratum to ensure representation from all the different characteristics. This allows for a more comprehensive understanding of the site as a whole and ensures that all the important variations are captured in the sampling process.

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78. What is the definition of quality control?

Explanation

The definition of quality control is the steps to be taken to determine the validity of sampling and analytical procedures. This involves ensuring that the methods used for collecting samples and conducting analyses are accurate and reliable. Quality control measures help to identify and correct any errors or biases in the sampling and analysis process, ensuring that the results obtained are valid and trustworthy.

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79. Integrated sampling is also referred to as

Explanation

Integrated sampling is a method used in environmental monitoring to continuously measure pollutants over a period of time. It involves collecting samples at regular intervals and analyzing them to determine the concentration of pollutants. This method provides a more accurate and comprehensive understanding of pollutant levels compared to instantaneous sampling, as it takes into account variations in pollutant concentrations over time. Therefore, the answer "indirect reading or continuous monitoring" is correct as it accurately describes the process of integrated sampling.

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80. How and why would you develop a time series plot when analyzing environmental health data?

Explanation

Developing a time series plot when analyzing environmental health data allows us to observe changes or trends over time. By plotting each data value as a function of time, we can visually identify patterns or fluctuations in the data that may indicate long-term trends or seasonal variations. This helps in understanding the temporal dynamics of environmental health factors and can assist in making informed decisions or interventions to address any identified issues. Plotting the data values on a map or analyzing relationships between variables from a sampling plot are not relevant to identifying changes or trends over time in this context.

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81. At a minimum, the information gathered for trend analysis should include

Explanation

The information gathered for trend analysis should include the sample location, sample date/time, constituent, analytical result, and selected OEEL. This information is important for analyzing trends over time and identifying any patterns or changes in the data. The sample location and date/time help to track where and when the samples were collected, while the constituent and analytical result provide information about the specific substance being measured and its concentration. The selected OEEL is used as a reference to determine if the measured concentration exceeds any established exposure limits.

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82. It is important to know how a contaminant interacts within the soil because it

Explanation

Understanding how a contaminant interacts within the soil is crucial because it allows you to determine the depth and extent of the contamination. This knowledge helps in deciding how deep and how far out from the contamination area to collect samples for analysis. By knowing the spread of contamination, you can ensure that you collect an adequate amount of soil samples to accurately assess the level of contamination in the area.

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83. Which would it be prudent to accomplish if the time weighted average (TWA) is already above the occupational and environmental exposure limit (OEEL)?

Explanation

If the time weighted average (TWA) is already above the occupational and environmental exposure limit (OEEL), it would be prudent to calculate the lower confidence limit (LCL). This is because the LCL provides a range of values that are likely to contain the true mean exposure level with a certain level of confidence. By calculating the LCL, one can assess the level of risk associated with the exposure and determine if further actions need to be taken to reduce it.

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84. When performing a detector tube system check, how long should you wait after squeezing the pump to look for the end of stroke indicator?

Explanation

When performing a detector tube system check, it is recommended to wait for 15 minutes after squeezing the pump to look for the end of stroke indicator. This waiting time allows for proper gas sampling and ensures accurate readings. Waiting for a longer duration, such as 40 minutes, may result in inaccurate readings as the gas concentration could change during that time. Therefore, 15 minutes is the appropriate waiting time for a reliable detector tube system check.

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85. When sampling for vapors, minimum and maximum flow rates are used with a solid sorbent tube to ensure

Explanation

The use of minimum and maximum flow rates with a solid sorbent tube ensures that the contaminant will be in contact with the collection media long enough to be captured. By adjusting the flow rates, the sampling process can be optimized to ensure that an adequate amount of the contaminant is collected without damaging the media. This allows for a more effective sampling strategy and ensures accurate results.

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86. You perform heterotrophic plate counts for swimming pools to

Explanation

Heterotrophic plate counts are performed to measure changes in the swimming pool treatment process. This is because heterotrophic organisms are commonly found in water and their presence can indicate the effectiveness of the treatment process. By comparing the plate counts before and after treatment, any changes in the numbers of heterotrophic organisms can be observed, providing insights into the efficiency of the treatment process.

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87. Your goal using a direct reading instrument (DRI) to perform air sampling is to obtain

Explanation

When using a direct reading instrument (DRI) to perform air sampling, the goal is to obtain the most representative air sample possible. This means that the sample should accurately reflect the air quality in the specific area or environment being tested. By obtaining a representative sample, it allows for a more accurate assessment of potential hazards or pollutants present in the air. This information can then be used to make informed decisions regarding safety measures or mitigation strategies.

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88. You are developing a Conceptual Site Model (CSM) to identify type(s) of data needed. Which step of the Data Quality Objectives (DQO) process is being conducted?

Explanation

The correct answer is Step 3- Identify the information inputs. In this step of the DQO process, the focus is on identifying the type(s) of data needed to address the problem or decision at hand. The Conceptual Site Model (CSM) is being developed to understand the site and its potential sources of contamination, and in order to do so, it is necessary to identify the specific information inputs required for the CSM. This step helps ensure that the necessary data is collected and analyzed to support the decision-making process.

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89. Exposure excursions above the Occupational and Environmental Exposure Limit - time weighted average (OEEL-TWA) should not exceed three times the OEEL-TWA for more than a total of how many minutes during a work day?

Explanation

Exposure excursions above the Occupational and Environmental Exposure Limit - time weighted average (OEEL-TWA) should not exceed three times the OEEL-TWA for more than a total of 30 minutes during a work day. This means that if the exposure level exceeds the limit, it can do so for a maximum of 30 minutes in total throughout the day. Going beyond this limit could pose a risk to the health and safety of workers.

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90. Although the true limits are not to be exceeded, which can be a single sample or a series of consecutive samples totaling 15 minutes?

Explanation

The term "Ceiling" refers to the maximum allowable limit that should not be exceeded. In this context, the question is asking about a limit that can be a single sample or a series of consecutive samples totaling 15 minutes. The correct answer, "Ceiling," implies that this limit is the maximum threshold that should not be crossed, regardless of whether it is a single sample or a cumulative duration of 15 minutes.

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91. The goal of a case-control epidemiological study is to

Explanation

A case-control epidemiological study aims to understand whether exposures increase the risk of a disease. This type of study compares individuals who have a specific disease (cases) with individuals who do not have the disease (controls). By examining the different exposures and characteristics of cases and controls, researchers can determine if certain exposures are associated with an increased risk of developing the disease. This information is crucial for identifying potential risk factors and developing preventive measures to reduce the incidence of the disease.

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92. Which is an example of an adsorption device?

Explanation

A fritted bubbler is an example of an adsorption device because it is commonly used to remove unwanted gases or vapors from a gas stream by trapping them on a solid surface. The fritted bubbler consists of a glass tube with a porous frit at the bottom, allowing the gas to pass through while the adsorbent material inside the bubbler captures the target substances. This process of adsorption helps to purify the gas stream by effectively removing contaminants.

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93. It is important to use a chain of custody form because it helps ensure sample integrity from

Explanation

A chain of custody form is important because it helps maintain the integrity of a sample from the moment it is collected until the data is reported. It ensures that the sample is properly handled and documented throughout the entire process, including collection, analysis, and data reporting. This helps prevent any tampering or contamination of the sample, ensuring accurate and reliable results.

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94. When considering the type of analysis and sampling goal for environment health data, what strategy is used for identifying changes over time?

Explanation

To identify changes over time in environment health data, the strategy used is to collect multiple samples at a single location over time. This approach allows for the examination of variations and trends in the data at a specific location, providing insights into any temporal changes that may occur. By collecting samples over time, it becomes possible to track and analyze the data for any patterns or shifts, which can be valuable for understanding the dynamics and changes in environmental health.

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95. Why would you develop a histogram when analyzing environmental health data?

Explanation

A histogram is not the appropriate tool for analyzing environmental health data as it displays the frequency distribution of a single variable, typically a continuous variable, in different bins. It does not provide data values as a function of time or on a map. Instead, developing a time series plot is more suitable as it allows for the visualization of data over time, enabling the identification of changes or trends. This plot helps in understanding how the environmental health data varies with time and can provide insights into patterns and relationships that may exist.

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96. Which is a true statement regarding duplicate samples?

Explanation

No longer used question so answer doesn't matter

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Fluid transfer is best accomplished using
This occupational exposure limit (OEL) is a concentration of...
If any of your sampling equipment was contaminated it could cause
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When is the only time you collect bacteriological samples of a hot...
What type of sampling is being conducted if a technician is using a...
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When would it be advantageous to use field analytical screening...
The purpose of calibrating water sampling and analysis equipment is to
A 15-minute time weighted average (TWA) short-term exposure limit is...
How do you prepare a blank?
When performing post sampling calibration, use the lowest flow rate...
Composite sampling is primarily used when sampling
When developing an Occupational Exposure strategy, the purpose of...
Which is not an AFI 48–146 guideline for performing exposure...
Which statement best describes chain of custody?
Which phrase most accurately describes the American Industrial Hygiene...
If you ship your bacteriological water samples to an approved...
What type of Occupational and Environmental Exposure Limits (OEEL) is...
When should gas and vapor meters be field calibrated?
The equipment that functions as a fully equipped portable laboratory...
When should you take pH and chlorine measurements of the base swimming...
Which statement describes grab sampling?
What is the difference between the DOD and AF Assessment Models?
After the results from mass/volume concentration air sampling are...
What sample media do you use for the Spread Plate Method?
When calibrating a Photo Ionization Detector/Flame Ionization Detector...
What key indicators are measured by indoor air quality monitors?
According to American Industrial Hygiene Association (AIHA), the goal...
Why is a single "blank" run sufficient as an operational...
What are the most commonly used devices for particulate sampling?
Which device allows the collection of respirable sized particles?
Which of these is not a consideration when comparing analysis results...
When you are sampling for solids, what is the maximum regulatory time...
Which is a portable gas chromatograph designed for response situations...
Drinking water with a high pH level (above 8.5) indicates to you the...
When collecting potable water samples for bacteriological analysis,...
In addition to being a required mandate, sampling is performed to
Remediation sampling is conducted to determine
Blank samples are prepared and shipped along with air samples to
Why are proper protocol and preservation guidelines important elements...
When determining the collection volume for an air sample, you would...
In the liquid sampling quality assurance/ quality control (QA/QC)...
What are the two types of augers?
What item must be field checked but cannot be calibrated?
What test do you use to obtain qualitative information on whether or...
What is a primary benefit of field analysis?
If you sample for 7 hours of a 10 hour shift and can document that the...
The purpose of establishing an Immediately Dangerous to Life or Health...
If you need to determine the residual chlorine content in a drinking...
What action should be taken before collecting any surface or...
What action should you take if the bacteriological quality of the...
Water sample result interpretation is conducted by
The development of your flight's Environmental Sampling Analysis and...
If the color of the water in the test tube does not exactly match any...
After sampling results have been obtained, how are they interpreted?
When collecting drinking water samples, in what order should you...
The reason you need make sure historical data and recent data are...
What type of water/liquid do you use to calibrate the pH pen?
The 95th percentile exposure estimates
The scheduled work week has changed to 8 hours per day/6 days a week....
You should seal your liquid sample containers because it
When considering additive effects of chemicals, the occupational...
If air sampling showed that a worker is exposed to concentrations of...
What must you calculate from the sampling and analytical error and...
Sample holding times, preservatives, and collection tool hygiene are...
How can the workers be affected if you calculate a compliance factor...
If a soil sample is mixed or blended to create an even distribution of...
When comparing your sample results to a standard, what is the...
What is the proper way to document your sample results once they have...
What level of Protective Action Criteria (PAC) indicates...
What is the major concern when sampling for volatile organic...
When sterilizing a water tap, what is the percentage of chlorine...
The recommended flow rate of an example chemical is 0.5 to 1.0 liters...
When collecting breathing zone air samples the flow rate changes since...
Which type of sampling strategy should be used when there is minimal...
What type of sampling strategy would be used to investigate large...
What is the definition of quality control?
Integrated sampling is also referred to as
How and why would you develop a time series plot when analyzing...
At a minimum, the information gathered for trend analysis should...
It is important to know how a contaminant interacts within the soil...
Which would it be prudent to accomplish if the time weighted average...
When performing a detector tube system check, how long should you wait...
When sampling for vapors, minimum and maximum flow rates are used with...
You perform heterotrophic plate counts for swimming pools to
Your goal using a direct reading instrument (DRI) to perform air...
You are developing a Conceptual Site Model (CSM) to identify type(s)...
Exposure excursions above the Occupational and Environmental Exposure...
Although the true limits are not to be exceeded, which can be a single...
The goal of a case-control epidemiological study is to
Which is an example of an adsorption device?
It is important to use a chain of custody form because it helps ensure...
When considering the type of analysis and sampling goal for...
Why would you develop a histogram when analyzing environmental health...
Which is a true statement regarding duplicate samples?
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