Common use of Sampling rationale Clause in Contracts

Sampling rationale. Loads may be selected for sampling when observation of the load by SBWMA or Contractor indicates that it may exceed the allowed Contamination level. A sampling process will be used to determine the measured Contamination level in individual loads. Approximately five (5) samples, each weighing approximately one hundred and fifty (150) pounds, are required from an individual load in order to calculate the measured Contamination level with a sufficient level of accuracy. It is expected that a two (2) person crew can obtain, sort, and weigh five (5) samples in a five (5) to seven (7) hours period. Test procedures are broken down in to the following steps, which shall be used by SBWMA, or a third party designated by the SBWMA. • Safety training and staff coordination • Sampling and sorting area designation • Sample selection • Sample sorting • Sample disposal • Data management These steps are described in more detail following the definitions of roles. Each step is the responsibility of a specific person or group of people as follows: • sampling crew manager—responsible for selecting samples, working with Operator and the • sampling crew—responsible for sorting samples. • facility manager—responsible for coordinating with the sampling crew manager. • tipping floor staff—responsible for identifying loads potentially Contaminated beyond the acceptable threshold, creating a designated sampling and sorting area, and ensuring segregation of selected loads in that area. • loader operator(s)—responsible for segregating the selected the load from other loads in the designated sampling and sorting area. When the sampling crew manager and the sampling crew arrive at the Composting Facility they will participate in any required safety training and put on all required personal protective equipment (see the equipment list shown in Appendix 3). The sampling crew manager will also walk through the process of extracting samples from the designated load with both the loader operator(s) and the tipping floor staff. With the input of the tipping floor staff and the loader operator(s), the sampling crew manager and sampling crew will set up in the designated sampling and sorting area near the tipping floor. The sorting area should be in a location near the load to be sampled and from which the loader can safely remove samples after sorting. Five (5) cells will be randomly selected for sampling from each load using a random number generator. The sampling crew manager will assist the loader operator in locating the appropriate cell for each sample using the sample cell map in Figure 1 below. After the loader has extracted the material in the selected cell, the sampling crew manager will guide the loader to a designated tarp. Using visual cues the sampling crew manager will ensure the loader operator(s) deposits the proper quantity of material on the tarp. A shovel may be used to add material from the bottom of the cell to ensure the sample includes some heavy and small material that the loader bucket cannot collect. Pulling the tarp is a basic test used to estimate sample weight.1 If it is determined that a sample is too heavy it may be lightened by removing vertical slices from the sample. If it is determined that a sample is too light it may be increased by removing or adding more material. It is important to add or remove all material in the slice from the top to bottom, to ensure that both small, heavy, and loose materials and large, light, and bagged materials are added or removed. Samples can be queued and stored on tarps until sorted but samples must be prevented from mixing with each other and with other material on the tipping floor. The sampling crew manager will place a unique sample placard on each sample for a photograph and, if the sample is not immediately sorted, for later identification. The placard is marked with a unique sample identification number and additional information (such as the date) used to identify loads in photographs and correlate load net weights with sample details. Each placard will be coded according to its corresponding sampling population (e.g., ’SPM-1’ indicates the first load of segregated Plant Material). Each load will be photographed individually with the sample placard visible and legible. The sample identification number, as designated by the placard, will be recorded on the tally form (see Appendix 2 for an example of this form.) The sample will be moved into the designated sorting area. Next, the sampling crew will sort the Contamination materials, as defined in Appendix 1, out of the load and into sort containers. The sampling crew will then weigh the Contamination materials while the sampling crew manager records the weights on the tally form. The remainder of the load–all acceptable items–will be put into containers, weighed, and recorded on the tally form. The sampling crew manager is responsible for monitoring the homogeneity of material in each container and ensuring the accuracy of the sorting process. At the end of each sampling day the sampling crew will comply with any tipping floor staff directions regarding cleaning the designated sampling and sorting area and storing sampling and sorting supplies. After the weight of all material in each sample is recorded on the tally sheet, the sampling crew will move the sorted material to a location where it is safe and convenient for the loader to remove. At the end of each sampling day, the sampling crew manager will review all forms for accuracy and completeness. Any issues shall be resolved immediately while the day’s work is still fresh in the mind. To ensure the tally forms are not lost before inputting the data into an electronic form, copies shall be made of all completed forms and copies will be kept in a place separate from the originals. One copy of the forms will be mailed or hand delivered to the person inputting the data into an electronic form. The appendices cover calculations, data collection forms, and an equipment list for this study. All loads identified for sorting shall be sorted and weighed into the following two (2) categories:

Sampling rationale. Loads may be selected for sampling when observation of the load by SBWMA or Contractor indicates that it may exceed the allowed Contamination level. A sampling process will be used to determine the measured Contamination level in individual loads. Approximately five (5) samples, each weighing approximately one hundred and fifty (150) pounds, are required from an individual load in order to calculate the measured Contamination level with a sufficient level of accuracy. It is expected that a two (2) person crew can obtain, sort, and weigh five (5) samples in a five (5) to seven (7) hours period. Test procedures are broken down in to the following steps, which shall be used by SBWMA, or a third party designated by the SBWMA. • Safety training and staff coordination • Sampling and sorting area designation • Sample selection • Sample sorting • Sample disposal • Data management These steps are described in more detail following the definitions of roles. Each step is the responsibility of a specific person or group of people as follows: • sampling crew manager—responsible for selecting samples, working with Operator and the • sampling crew—responsible for sorting samples. • facility manager—responsible for coordinating with the sampling crew manager. • tipping floor staff—responsible for identifying loads potentially Contaminated beyond the acceptable threshold, creating a designated sampling and sorting area, and ensuring segregation of selected loads in that area. • loader operator(s)—responsible for segregating the selected the load from other loads in the designated sampling and sorting area. When the sampling crew manager and the sampling crew arrive at the Composting Facility they will participate in any required safety training and put on all required personal protective equipment (see the equipment list shown in Appendix 3). The sampling crew manager will also walk through the process of extracting samples from the designated load with both the loader operator(s) and the tipping floor staff. With the input of the tipping floor staff and the loader operator(s), the sampling crew manager and sampling crew will set up in the designated sampling and sorting area near the tipping floor. The sorting area should be in a location near the load to be sampled and from which the loader can safely remove samples after sorting. Five (5) cells will be randomly selected for sampling from each load using a random number generator. Harvest Power_SBWMA_Organic Material Processing Agreement The sampling crew manager will assist the loader operator in locating the appropriate cell for each sample using the sample cell map in Figure 1 below. After the loader has extracted the material in the selected cell, the sampling crew manager will guide the loader to a designated tarp. Using visual cues the sampling crew manager will ensure the loader operator(s) deposits the proper quantity of material on the tarp. A shovel may be used to add material from the bottom of the cell to ensure the sample includes some heavy and small material that the loader bucket cannot collect. Pulling the tarp is a basic test used to estimate sample weight.1 If it is determined that a sample is too heavy it may be lightened by removing vertical slices from the sample. If it is determined that a sample is too light it may be increased by removing or adding more material. It is important to add or remove all material in the slice from the top to bottom, to ensure that both small, heavy, and loose materials and large, light, and bagged materials are added or removed. Samples can be queued and stored on tarps until sorted but samples must be prevented from mixing with each other and with other material on the tipping floor. The sampling crew manager will place a unique sample placard on each sample for a photograph and, if the sample is not immediately sorted, for later identification. The placard is marked with a unique sample identification number and additional information (such as the date) used to identify loads in photographs and correlate load net weights with sample details. Each placard will be coded according to its corresponding sampling population (e.g., ’SPM-1’ indicates the first load of segregated Plant Material). Each load will be photographed individually with the sample placard visible and legible. The sample identification number, as designated by the placard, will be recorded on the tally form (see Appendix 2 for an example of this form.) The sample will be moved into the designated sorting area. Next, the sampling crew will sort the Contamination materials, as defined in Appendix 1, out of the load and into sort containers. The sampling crew will then weigh the Contamination materials while the sampling crew manager records the weights on the tally form. The remainder of the load–all acceptable items–will be put into containers, weighed, and recorded on the tally form. The sampling crew manager is responsible for monitoring the homogeneity of material in each container and ensuring the accuracy of the sorting process. At the end of each sampling day the sampling crew will comply with any tipping floor staff directions regarding cleaning the designated sampling and sorting area and storing sampling and sorting supplies. After the weight of all material in each sample is recorded on the tally sheet, the sampling crew will move the sorted material to a location where it is safe and convenient for the loader to remove. At the end of each sampling day, the sampling crew manager will review all forms for accuracy and completeness. Any issues shall be resolved immediately while the day’s work is still fresh in the mind. To ensure the tally forms are not lost before inputting the data into an electronic form, copies shall be made of all completed forms and copies will be kept in a place separate from the originals. One copy of the forms will be mailed or hand delivered to the person inputting the data into an electronic form. The appendices cover calculations, data collection forms, and an equipment list for this study. All loads identified for sorting shall be sorted and weighed into the following two (2) categories: