Environmental monitoring factors affecting on-site sampling of water and wastewater

2.2 Reduce errors caused by equipment and instruments

The error of equipment and instruments often has incalculable consequences on the sampling results, so in order to ensure the sampling quality, the use of equipment and instruments must comply with the law to avoid problems caused by improper use of equipment. After the sampling of water and wastewater, the storage and sealing of samples must be carried out in accordance with the operating standards to avoid the negative impact of external factors on the samples. For some wastewater with special sampling requirements, the sampler and storage container should be washed with sampling water before the collection, and these special samples should be marked. And provide a suitable storage environment. Once there is a non-compliant part in the sample collection process, it is necessary to correct it in time and conduct supplementary collection, do not have a fluke mentality, and maintain a meticulous attitude to complete the work. In addition, during the sampling process, the relevant equipment and instruments should be properly protected, and the equipment should not be damaged due to operational errors. The equipment should also be isolated during transportation to avoid affecting the work efficiency due to damage.

2.3 Improve the quality awareness of staff

To reduce the influence of negative factors of on-site sampling of water and wastewater, it is necessary to improve the quality awareness of the staff, standardize the process of on-site sampling, and reduce the influence of accidental factors on the quality of on-site sampling. This requires that in the process of sampling work, staff in all aspects should strengthen the importance of the process, and work in accordance with uniform norms at each sampling point. In daily work, staff should be able to pay attention to improve their own work proficiency, in the sampling work can be timely and accurate to complete the relevant workflow. For on-site sampling work using law enforcement recorders, personnel, operations, equipment and real-time section environment should be taken into the video range at the same time, so as to facilitate later verification work.

2.4 Strengthen the monitoring of on-site sampling

In order to ensure the safety and accuracy of sampling, sampling personnel need to consider a variety of factors when conducting on-site sampling, and then determine the location of sampling samples. In addition, when taking water and wastewater, the staff should avoid some places with suspended materials, because these suspended materials will have a certain impact on the results of the selected samples. Of course, if the sampling personnel can not accurately select the sampling location, you can use the current technology GPS to select the sample location, so that with the help of high-tech will bring great convenience to the field sampling work. If workers use a boat to sample, they should be upstream to sample, so that they can protect against the impact of the sediment below. If the sampler samples at the same sampling site, it should choose a layered sampling method to select samples, so as to prevent the mutual disturbance between different levels. The unified operation before sampling should be to clean the container and instrument with water first, but for those with special requirements, it is not necessary to clean before sampling, and finally, it is necessary to make a record according to the relevant regulations.