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The scale house staff will instruct the driver to place the placard in a highly visible place at the front of the truck (e.g., on the dashboard), and will direct the driver where to unload. The placard is the signal to the sampling crew that a load selected for sampling has arrived. The placard is marked with a unique sample identification number and additional information used to randomly select cells, identify loads in photographs, and correlate net weights with sample details. Each placard will be coded according to its corresponding sampling population (e.g., '0-S-01' indicates a load of Single-Family Organic Materials from the south geographic area). Sample collection The tipping house staffwill direct the driver to empty the entire truckload of material in an elongated pile on a designated dumping area. To the extent possible, this area shall be clean and the unloaded material shall be segregated from other loads on the tipping floor. The location of the unloading area may change during any given day. The sampling crew manager will collect the placard from the Contractor and, once the load is emptied, will assist the loader operator(s) in locating the appropriate cell for the sample, as noted on the sample placard, using the map shown in Figure 1. The loader operator(s) will then extract the material in the selected cell. The sampling crew manager will guide the loader operator(s) to a designated tarpaulin, and will ensure that the proper quantity of material (one-hundred and twenty five (125) to two hundred and twenty five (225) pounds, depending on the material stream) is unloaded on the tarpaulin. 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 failed to collect. Pulling the tarpaulin taught is a basic test used to estimate sample weight. 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 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 shall be kept separate. The sampling crew manager will place the sample placard on its respective sample for a photograph and, if the sample is not immediately sorted, wrap the sample in its tarpaulin for later sampling. The sampling crew manager will photograph each load individually with the sample placard visible and legible. Facility Agreement, Attachment 2-H Contamination Measurement Methodology Page 6 of 19