Laserfiche WebLink
<br />CONTAMINATION MEASUREMENT METHODOLOGY <br /> <br />This Attachment presents the methodology for quantifying the Contamination Level of <br />single load(s) of Recyclable Materials Collected in the Service Area and delivered to the <br />Designated Transfer and Processing Facility by the Collection Contractor. <br /> <br />This Attachment is organized into the following six (6) sections: <br /> <br />1. Objectives-describes the purpose of the methodology. <br /> <br />2. Sampling rationale-defines which loads will be sampled. <br /> <br />3. Sampling allocation-describes the number of samples required to provide a <br />sufficient level of accuracy in findings. <br /> <br />4. Test procedures-describes sampling and sorting activities for each load. <br /> <br />5. Sorting categories-describes the sorting categories. <br /> <br />6. Calculations <br /> <br />Appendices 1 through 3 con~ist of: <br />1. methodology checklist <br />2. sample data collection forms <br />3. equipment list <br /> <br />1. Objectives <br />This methodology is designed to estimate the Contamination Level (as a percentage by <br />weight of the entire load) in an individual load from five (5) inbound material types <br />Collected in the Service Area. These material streams are listed below and described <br />further in Section 3. <br /> <br />. Commercial Source Separated and Targeted Recyclable Materials <br />. Commercial Organic Materials <br />. Commercial Plant Materials <br />. Single-Family Targeted Recyclable Materials <br />. Single-Family Organic Materials <br />The methodology described herein is intended to produce consistent and statistically <br />reliable estimates of the Contamination Level of individual loads from above material <br />streams. In addition, the methodology is designed to require the minimum necessary <br />organizational time and financial investment. <br /> <br />2. Sampling rationale <br />Loads may be selected for sampling when observation of the load by AUTHORITY or <br />Facility Operator indicates that it may exceed the allowed Contamination Level. A <br />statistical sampling process will be used to determine the Measured Contamination <br />Level in individual loads. <br /> <br />3. Sampling allocation <br /> <br />Approximately five (5) samples, each weighing approximately one hundred and fifty <br />(150) pounds, are required from an individual load in order to calculate the Measured <br />Contamination Level with a sufficient level of accuracy for every material stream except <br />Commercial Organic Materials. Because of the variability typically found in loads of <br /> <br />Facility Agreement, Attachment 2E <br />Contamination Measurement Methodology <br />Page 3 of 15 <br />