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• • <br /> Sample sorting <br /> The sample identification number, as designated by the placard, will be recorded on the <br /> tally form (see Appendix 2 for an example of this form.) The sample will be moved into <br /> the designated sorting area. Next, the sampling crew will sort the Contamination <br /> materials, as defined in Appendix 1, out of the Toad and into sort containers. The <br /> sampling crew will then weigh the Contamination materials while the sampling crew <br /> manager records the weights on the tally form. The remainder of the Toad —all acceptable <br /> items —will be put into containers, weighed, and recorded on the tally form. The sampling <br /> crew manager is responsible for monitoring the homogeneity of material in each <br /> container and ensuring the accuracy of the sorting process. At the end of each sampling <br /> day the sampling crew will comply with any tipping floor staff directions regarding <br /> cleaning the designated sampling and sorting area and storing sampling and sorting <br /> supplies. <br /> Sample disposal <br /> After the weight of all material in each sample is recorded on the tally sheet, the <br /> sampling crew will move the sorted material to a location where it is safe and convenient <br /> for the loader to remove. <br /> Data management <br /> At the end of each sampling day, the sampling crew manager will review all forms for <br /> accuracy and completeness. Any issues shall be resolved immediately while the day's <br /> work is still fresh in the mind. To ensure the tally forms are not lost before inputting the <br /> data into an electronic form, copies shall be made of all completed forms and copies will <br /> be kept in a place separate from the originals. One copy of the forms will be mailed or <br /> hand delivered to the person inputting the data into an electronic form. <br /> The appendices cover calculations, data collection forms, and an equipment list for this <br /> study. <br /> 5. Sorting categories <br /> All Toads identified for sorting shall be sorted and weighed into the following two (2) <br /> categories: <br /> 1) Contamination <br /> 2) Targeted Recyclable Materials, Source - Separated Targeted Recycable <br /> Materials, Organic Materials, or Plant Materials <br /> 6. Calculations <br /> Estimates of Contamination and Targeted Recyclable Materials, Source - Separated <br /> Targeted Recyclable Materials, Organic Materials, or Plant Materials will be calculated <br /> using a method that gives equal weighting or "importance" to each sample within a given <br /> stream. Confidence intervals (error ranges) will be calculated based on assumptions of <br /> normality in the composition estimates. <br /> In the descriptions of calculation methods, the following variables will be used: <br /> • i denotes an individual sample. <br /> • j denotes the material type. <br /> • c is the weight of the material type j in a sample. <br /> Franchise Agreement for Collection Services with Recology San Mateo County Attachment E -1 <br /> Redwood City Page 5 of 14 <br />